CN115167372A - Fault determination method, fault determination device, processor and electronic control unit - Google Patents

Abstract

The application provides a fault determination method, a fault determination device, a processor and an electronic control unit, wherein the fault determination method comprises the following steps: respectively calculating the voltage value of a target detection point of one acquisition time point by adopting a plurality of preset calculation formulas to obtain a plurality of voltage calculation values; calculating the difference value between each voltage calculation value and each voltage acquisition value to obtain a target difference value, and calculating the ratio of the target difference value to each voltage acquisition value to obtain a plurality of target percentages; determining a target fault type of the sensor at least according to a plurality of target percentages corresponding to one acquisition cycle and a preset deviation range, or determining a target fault type of the connector at least according to voltage calculation values and voltage acquisition values of a plurality of acquisition cycles, wherein the target fault type at least comprises one of the following types: the sensor is short-circuited to the ground, the sensor is short-circuited to the power supply, the sensor is open-circuited, and the connector is connected in a virtual mode, so that the problem that the fault type of the connector or the sensor is difficult to determine in the prior art is solved.

Description

Fault determination method, fault determination device, processor and electronic control unit

technical field

The present application relates to the field of vehicle control, and in particular, to a fault determination method, a fault determination device, a computer-readable storage medium, a processor and an electronic control unit.

Background technique

An electronic control unit (Electronic Control Unit, ECU for short) is generally connected to a plurality of sensors to obtain data information from the plurality of sensors, thereby performing logic control on the engine. The connection between the electronic control unit and the corresponding sensor generally requires the use of connectors and wiring harnesses. For example, two ends of the wire harness are respectively connected with connectors, wherein one end of the wire harness connected with the connector is connected to the sensor, and the other end of the wire harness connected with the connector is connected to the electronic control unit.

In the prior art, in order to determine whether the connector connected to one end of the electronic control unit or the sensor connected to the electronic control unit is faulty, an RC circuit (resistor-capacitor circuit, Resistor-Capacitancestry circuit, referred to as abbreviated as RC circuit) is generally set in the electronic control unit. RC circuit) and an analog quantity acquisition module, wherein the analog quantity acquisition module is used to collect the voltage on the branch between the filter capacitor and the filter resistor in the RC circuit. Then use the voltage collected by the analog quantity acquisition module to determine whether the connector or sensor is faulty. For example, a typical analog signal is a voltage-type signal or a resistance-type signal of 0-5V. When the analog quantity acquisition module collects 0V or 5V, it can report the fault that the voltage value exceeds the lower limit or the upper limit. However, in this case, the specific fault types of the voltage value exceeding the lower limit or the upper limit cannot be distinguished. For example, it cannot be determined whether the voltage value exceeding the upper limit or the lower limit is caused by an external short circuit or an open circuit. In addition, in the case of a virtual connection of the connector, since the voltage value of the RC circuit fluctuates all the time, it cannot reach the upper limit or the lower limit, and it is impossible to determine whether the connector is virtual connection.

Therefore, there is a need for a method that can determine the type of failure of a connector or a sensor.

The above information disclosed in this Background section is only for enhancement of understanding of the background of the technology described in this article and therefore it may contain certain information that does not form part of the already known in this country to a person of ordinary skill in the art known prior art.

SUMMARY OF THE INVENTION

The main purpose of the present application is to provide a fault determination method, a fault determination device, a computer-readable storage medium, a processor and an electronic control unit, so as to solve the problem that it is difficult to determine the fault type of a connector or a sensor in the prior art.

According to an aspect of the embodiments of the present invention, a fault determination method is provided. An electronic control unit is connected to a sensor at least through a connector, and the electronic control unit includes an RC circuit and an analog quantity acquisition module, wherein the analog quantity acquisition module It is used to collect the voltage collection value of the target detection point, and the target detection point is located on the branch between the filter resistor and the filter capacitor in the RC circuit. The fault determination method includes: using a plurality of preset calculation formulas, respectively calculating Collecting the voltage value of the target detection point at one time point to obtain a plurality of voltage calculation values, wherein one of the preset calculation formula corresponds to one of the voltage calculation values, and a plurality of the collection time points constitute a collection period; Calculate the difference between each of the calculated voltage values and the voltage collected value to obtain a target difference value, and calculate the ratio of the target difference value to the voltage collected value to obtain multiple target percentages; at least according to one of the collected voltage values A plurality of the target percentages corresponding to the cycle and a preset deviation range are used to determine the target fault type of the sensor, or, at least according to the calculated voltage values and the voltage collected values of a plurality of the collection cycles, to determine the The target fault type of the connector, the target fault type includes at least one of the following: sensor-to-ground short-circuit, sensor-to-power short-circuit, sensor open-circuit, and virtual connection of the connector.

计算所述目标检测点的电压值，得到所述第一电压计算值，其中，R₂为所述滤波电阻的电阻值，C₂为所述滤波电容的电容值，t为当前的所述采集时间点与上一次的所述采集时间点的时间间隔，U1为所述传感器的输入电压，VF1为所述电压计算值；采用

计算所述目标检测点的电压值，得到所述第二电压计算值，其中，R₁为所述RC电路中的上拉电阻或者下拉电阻的电阻值，VF2为所述第二电压计算值；采用

计算所述目标检测点的电压值，得到所述第三电压计算值，VF3为所述第三电压计算值。Optionally, the voltage calculation value includes a first voltage calculation value, a second voltage calculation value and a third voltage calculation value, and a plurality of preset calculation formulas are used to respectively calculate the voltage of the target detection point at a collection time point. value to obtain multiple voltage calculation values, including:

Calculate the voltage value of the target detection point to obtain the first calculated voltage value, where R ₂ is the resistance value of the filter resistor, C ₂ is the capacitance value of the filter capacitor, and t is the current acquisition The time interval between the time point and the last acquisition time point, U1 is the input voltage of the sensor, and VF1 is the calculated value of the voltage; using

Calculate the voltage value of the target detection point to obtain the second voltage calculation value, wherein R1 is the resistance value of the pull-up resistor or pull _- down resistor in the RC circuit, and VF2 is the second voltage calculation value; use

Calculate the voltage value of the target detection point to obtain the third voltage calculation value, where VF3 is the third voltage calculation value.

Optionally, determining the target fault type of the sensor according to at least a plurality of the target percentages corresponding to one collection period and a preset deviation range, including: at the current collection time point, the target failure type will be lower than the first The preset calculation formula corresponding to the voltage calculation value of the preset threshold value is determined as the target calculation formula, or the preset calculation formula corresponding to the voltage calculation value higher than the second preset threshold value is determined. is the target calculation formula; in the first N collection time points of the current collection time point, if each of the target percentages corresponding to the target calculation formula is within the corresponding preset deviation range , determine the target fault type of the sensor according to the fault type corresponding to the target calculation formula, wherein N is less than or equal to the total number of the collection time points in one collection period.

的情况下，确定所述目标故障类型为所述传感器对地短路；在所述目标计算公式

的情况下，确定所述目标故障类型为所述传感器开路；在所述目标计算公式为

的情况下，确定所述目标故障类型为所述传感器对电源短路。Optionally, determining the target fault type of the sensor according to the fault type corresponding to the target calculation formula, including: in the target calculation formula:

In the case of , determine that the target fault type is the short circuit of the sensor to ground;

In the case of , determine that the target fault type is the sensor open circuit; in the target calculation formula is

In the case of , it is determined that the target fault type is a short circuit of the sensor to the power supply.

对应的所述电压计算值是否均与所述电压采集值相同；在各所述电压计算值均与所述电压采集值相同的情况下，控制所述计数器增加预定值，得到目标计数次数；在预定时间内，所述目标计数次数超出预定计数次数的情况下，确定所述目标故障类型为所述接插件虚接。Optionally, the electronic control unit further includes a counter, which determines the target fault type of the connector according to at least the calculated voltage values and the collected voltage values of a plurality of the collection periods, including: determining multiple During the collection period,

Whether the corresponding calculated voltage values are the same as the collected voltage values; in the case that each of the calculated voltage values is the same as the collected voltage value, control the counter to increase a predetermined value to obtain the target number of counts; Within a predetermined time, when the target number of counts exceeds the predetermined number of counts, it is determined that the target fault type is the virtual connection of the connector.

Optionally, the fault determination method further includes: controlling the counter to reset when the time counted by the counter exceeds the predetermined time.

According to another aspect of the embodiments of the present invention, a fault determination device is also provided, the electronic control unit is connected to the sensor at least through a connector, the electronic control unit includes an RC circuit and an analog quantity acquisition module, wherein the analog quantity The acquisition module is used to collect the voltage acquisition value of the target detection point, the target detection point is located on the branch between the filter resistor and the filter capacitor in the RC circuit, and the fault determination device includes: a first calculation unit for adopting A plurality of preset calculation formulas, respectively calculate the voltage value of the target detection point at a collection time point, and obtain a plurality of voltage calculation values, wherein one of the preset calculation formula corresponds to one of the voltage calculation values, and a plurality of The collection time point constitutes a collection cycle; the second calculation unit is used to calculate the difference between each of the voltage calculation values and the voltage collection values, obtain a target difference value, and calculate the target difference value and the voltage collection value. A ratio of values to obtain a plurality of target percentages; a determining unit, configured to determine a target fault type of the sensor at least according to a plurality of target percentages corresponding to one of the collection periods and a preset deviation range, or, at least according to multiple target percentages and a preset deviation range. Determine the target fault type of the connector by calculating the voltage calculation value and the voltage acquisition value for each of the acquisition cycles, and the target fault type includes at least one of the following: sensor-to-ground short circuit, sensor-to-power short circuit , Sensor open circuit, virtual connection of connectors.

According to yet another aspect of the embodiments of the present invention, a computer-readable storage medium is further provided, the computer-readable storage medium includes a stored program, wherein the program executes any one of the fault determination methods.

According to yet another aspect of the embodiments of the present invention, a processor is also provided, and the processor is configured to run a program, wherein any one of the fault determination methods is executed when the program runs.

According to an aspect of the embodiments of the present invention, an electronic control unit is further provided, including a fault determination device, wherein the fault determination device is configured to execute any one of the fault determination methods.

In the embodiment of the present invention, in the fault determination method, first, at a collection time point, a plurality of preset calculation formulas are used to calculate the voltage values of the target detection points respectively, so as to obtain a plurality of voltage calculation values; then, according to a A plurality of voltage calculation values and voltage collection values corresponding to the collection time points are determined, and a plurality of target difference values are determined, and according to each of the target difference values and the voltage collection values, a plurality of target percentages are determined; finally, at least one target percentage is determined. A plurality of the target percentages and preset deviation ranges corresponding to the collection period are used to determine the target fault type of the sensor, or, at least according to the calculated voltage values and the voltage collection values of the plurality of collection periods, The target fault type for the connector is determined. In this solution, multiple preset calculation formulas are collected, and multiple voltage calculation values of the target detection point at the same collection time point are calculated respectively; and then the same collection time point is determined according to the multiple voltage calculation values and voltage collection values. Finally, the target fault type of the sensor is determined at least according to the multiple target percentages corresponding to one collection period and the preset deviation range, or at least according to the voltage calculation value and the voltage collection value corresponding to the multiple collection periods, the connection is determined. The target failure type for the plugin. That is to say, in this scheme, the target fault type of the sensor or the connector can be determined ingeniously by calculating the voltage calculation value of the target detection point. Since this solution does not need to change the internal circuit of the electronic control unit, and does not need to increase the cost of hardware, the cost of the fault determination method of this solution is guaranteed to be low, and the fault type of the sensor or connector can be determined only through the above fault determination method. Thus, the problem that it is difficult to determine the fault type of the connector or the sensor in the prior art is solved.

Description of drawings

The accompanying drawings that form a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute improper limitations on the present application. In the attached image:

FIG. 1 shows a flowchart of a fault determination method according to an embodiment of the present application;

FIG. 2 shows a schematic structural diagram of a voltage-type analog quantity acquisition circuit according to an embodiment of the present application;

3 shows a schematic structural diagram of a resistance-type analog quantity acquisition circuit according to an embodiment of the present application;

FIG. 4 shows a schematic structural diagram of a fault determination apparatus according to an embodiment of the present application.

Wherein, the above-mentioned drawings include the following reference signs:

10. The first calculation unit; 20. The second calculation unit; 30. The determination unit; 100, the electronic control unit; 200, the analog quantity acquisition module; 300, the filter capacitor; Capacitance; 700, sensor; 800, pull-up resistor; 900, target detection point.

Detailed ways

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only The embodiments are part of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.

It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances for the embodiments of the application described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

As mentioned in the background art, it is difficult to determine the fault type of a connector or a sensor in the prior art. In order to solve the above problem, a typical implementation of the present application provides a fault determination method, a fault determination device, Computer readable storage medium, processor and electronic control unit.

According to an embodiment of the present application, a fault determination method is provided.

FIG. 1 is a flowchart of a fault determination method according to an embodiment of the present application. The electronic control unit is connected to the sensor at least through a connector. The electronic control unit includes an RC circuit and an analog quantity acquisition module, wherein the analog quantity acquisition module is used to collect the voltage acquisition value of the target detection point, and the target detection point is located in the RC circuit. On the branch between the filter resistor and the filter capacitor, as shown in Figure 1, the fault determination method includes the following steps:

Step S101, using a plurality of preset calculation formulas to calculate the voltage value of the target detection point at a collection time point, respectively, to obtain a plurality of voltage calculation values, wherein one of the above-mentioned preset calculation formula corresponds to one of the above-mentioned voltage calculation values, and a plurality of voltage calculation values are obtained. The above collection time points constitute a collection period;

Step S102, calculating the difference between each of the above-mentioned calculated voltage values and the above-mentioned voltage acquisition value to obtain a target difference value, and calculating the ratio of the above-mentioned target difference value to the above-mentioned voltage acquisition value to obtain a plurality of target percentages;

Step S103: Determine the target fault type of the sensor according to at least a plurality of the target percentages and a preset deviation range corresponding to the above collection period, or, at least according to the above-mentioned voltage calculation value and the above-mentioned voltage collection value of the plurality of above-mentioned collection periods, Determine the target fault type of the connector, and the target fault type includes at least one of the following: sensor-to-ground short-circuit, sensor-to-power short-circuit, sensor open-circuit, and connector virtual connection.

In the above-mentioned fault determination method, first, at a collection time point, a plurality of preset calculation formulas are used to calculate the voltage values of the target detection points respectively, so as to obtain a plurality of voltage calculation values; Determine a plurality of target difference values according to each of the above-mentioned target difference values and the above-mentioned voltage acquisition values, and determine a plurality of target percentages according to each of the above-mentioned target difference values and the above-mentioned voltage acquisition values; finally, according to at least a plurality of above-mentioned target percentages corresponding to one of the above-mentioned acquisition periods and a preset deviation range to determine the target fault type of the sensor, or at least determine the target fault type of the connector according to the voltage calculation value and the voltage acquisition value of a plurality of acquisition cycles. In this solution, multiple preset calculation formulas are collected, and multiple voltage calculation values of the target detection point at the same collection time point are calculated respectively; and then the same collection time point is determined according to the multiple voltage calculation values and voltage collection values. Finally, the target fault type of the sensor is determined at least according to the multiple target percentages corresponding to one collection period and the preset deviation range, or at least according to the voltage calculation value and the voltage collection value corresponding to the multiple collection periods, the connection is determined. The target failure type for the plugin. That is to say, in this scheme, the target fault type of the sensor or the connector can be determined ingeniously by calculating the voltage calculation value of the target detection point. Since this solution does not need to change the internal circuit of the electronic control unit, and does not need to increase the cost of hardware, the cost of the fault determination method of this solution is guaranteed to be low, and the fault type of the sensor or connector can be determined only through the above fault determination method. Thus, the problem that it is difficult to determine the fault type of the connector or the sensor in the prior art is solved.

Specifically, the above-mentioned sensor is a sensor connected to the electronic control unit through a connector and a wire harness. The above-mentioned connector is a connector connected to the electronic control unit.

Specifically, as shown in FIG. 2 and FIG. 3 , the electronic control unit 100 has an RC circuit and an analog quantity acquisition module 200 inside, wherein the RC circuit includes a filter capacitor 300 and a filter resistor 400 , and the target detection point 900 is located at the filter capacitor 300 and the branch between the filter resistor 400. In addition, the RC circuit may further include an electrostatic capacitor 600 and a pull-down resistor 500 (as shown in FIG. 2 ), or a pull-up resistor 800 (as shown in FIG. 3 ). Wherein, the sensor 700 is connected to the electronic control unit 100 through a wire harness with connectors at both ends (not shown in FIG. 2 and FIG. 3 ).

In a specific embodiment of the present application, for example, if a collection period is 10 minutes, the voltage calculation value of the target detection point is calculated every 1 minute, that is, a collection period includes 10 collection time points, and in each At the acquisition time point, a plurality of preset calculation formulas are used to calculate the voltage value of the target detection point respectively, such that one acquisition time point corresponds to multiple voltage calculation values and one voltage acquisition value, and then each voltage calculation value and the voltage acquisition value are calculated separately. The difference between the values is obtained to obtain multiple target differences, and then the ratio of each target difference to the voltage acquisition value is calculated to obtain multiple target percentages, such that one acquisition time point corresponds to multiple target percentages. Subsequently, the target fault type of the sensor may be determined at least according to multiple target percentages and preset deviation ranges corresponding to one collection period, or the target fault type of the connector may be determined at least according to the voltage calculation value and voltage collection value of multiple collection periods, This further ensures that the determined target fault type of the sensor or connector is more accurate.

Of course, in an actual application process, one collection period and the number of multiple collection time points included in one collection period can be adjusted according to actual application conditions.

It should be noted that the steps shown in the flowcharts of the accompanying drawings may be executed in a computer system, such as a set of computer-executable instructions, and, although a logical sequence is shown in the flowcharts, in some cases, Steps shown or described may be performed in an order different from that herein.

计算上述目标检测点的电压值，得到上述第一电压计算值，其中，R₂为上述滤波电阻的电阻值，C₂为上述滤波电容的电容值，t为当前的上述采集时间点与上一次的上述采集时间点的时间间隔，U1为上述传感器的输入电压，VF1为上述第一电压计算值；采用

计算上述目标检测点的电压值，得到上述第二电压计算值，其中，R₁为上述RC电路中的上拉电阻或者下拉电阻的电阻值，VF2为上述第二电压计算值；采用

计算上述目标检测点的电压值，得到上述第三电压计算值，VF3为上述第三电压计算值。在该实施例中，对于同一个采集时间点，分别采用不同的预设计算公式，计算目标检测点的电压计算值，后续根据多个采集时间点的多个电压计算值以及多个电压采集值，确定传感器的目标故障类型，这样可以进一步地较为巧妙地确定出传感器的目标故障类型。In an embodiment of the present application, the voltage calculation value includes a first voltage calculation value, a second voltage calculation value, and a third voltage calculation value, and a plurality of preset calculation formulas are used to calculate the above-mentioned target at the same collection time point respectively. Detect the voltage value of the point, and obtain multiple voltage calculation values, including:

Calculate the voltage value of the above-mentioned target detection point to obtain the above-mentioned first calculated voltage value, wherein R ₂ is the resistance value of the above-mentioned filter resistor, C ₂ is the capacitance value of the above-mentioned filter capacitor, and t is the current above-mentioned collection time point and the last time The time interval of the above-mentioned collection time points, U1 is the input voltage of the above-mentioned sensor, and VF1 is the calculated value of the above-mentioned first voltage;

Calculate the voltage value of the above-mentioned target detection point to obtain the above-mentioned second voltage calculation value, wherein R1 is the resistance value of the pull-up resistor or pull-down resistor in the above _- mentioned RC circuit, and VF2 is the above-mentioned second voltage calculation value; using

Calculate the voltage value of the target detection point to obtain the third voltage calculation value, and VF3 is the third voltage calculation value. In this embodiment, for the same collection time point, different preset calculation formulas are respectively used to calculate the voltage calculation value of the target detection point, and then according to the multiple voltage calculation values and the multiple voltage collection values of the multiple collection time points , to determine the target fault type of the sensor, so that the target fault type of the sensor can be further determined more subtly.

In order to further determine the target fault type of the sensor more simply, in another embodiment of the present application, the target fault type of the above-mentioned sensor is determined at least according to a plurality of above-mentioned target percentages corresponding to one above-mentioned collection period and a preset deviation range, The method includes: at the current collection time point, determining the preset calculation formula corresponding to the voltage calculation value lower than the first preset threshold as the target calculation formula, or determining the voltage higher than the second preset threshold The above-mentioned preset calculation formula corresponding to the calculated value is determined as the above-mentioned target calculation formula; in the first N above-mentioned collection time points of the current above-mentioned collection time point, if each of the above-mentioned target percentages corresponding to the above-mentioned target calculation formula is in the corresponding above-mentioned Within the preset deviation range, the target fault type of the sensor is determined according to the fault type corresponding to the target calculation formula, wherein N is less than or equal to the total number of the above-mentioned collection time points in one of the above-mentioned collection periods.

Specifically, the first preset threshold may be the voltage threshold exceeding the lower limit of the target detection point, and the second preset threshold may be the voltage threshold exceeding the upper limit of the target detection point. When a typical analog signal is a voltage-type signal or a resistance-type signal of 0-5V, the first preset threshold may be 0V, and the second preset threshold may be 5V.

Specifically, one collection period may correspond to a preset deviation range, and of course, each collection time point may also correspond to a preset deviation range. In the present application, this is not limited.

Specifically, in the above-mentioned embodiment, if the current collection time point is the first collection time point of a collection period, then the first N above-mentioned collection time points of the collection time point may be the first collection time point in the previous collection period. N acquisition time points. If in the same collection period, the total number of all collection time points before the current collection time point does not satisfy N, multiple collection time points in the previous collection period may also be taken. In the present application, this is not limited. In the actual application process, N can be adjusted according to the actual situation.

的情况下，确定上述目标故障类型为上述传感器对地短路；在上述目标计算公式为

的情况下，确定上述目标故障类型为上述传感器开路；在上述目标计算公式为

的情况下，确定上述目标故障类型为上述传感器对电源短路。在该实施例中，根据预设计算公式对应的故障类型，确定传感器的目标故障类型，这样可以进一步地较为简单地确定出传感器的目标故障类型。In another embodiment of the present application, determining the target fault type of the sensor according to the fault type corresponding to the target calculation formula includes: in the target calculation formula:

In the case of

In the case of , determine that the above target fault type is the above sensor open circuit; the above target calculation formula is

In the case of , it is determined that the above-mentioned target fault type is the short-circuit of the above-mentioned sensor to the power supply. In this embodiment, the target fault type of the sensor is determined according to the fault type corresponding to the preset calculation formula, so that the target fault type of the sensor can be further determined relatively simply.

对应的上述电压计算值是否均与上述电压采集值相同；在各上述电压计算值均与上述电压采集值相同的情况下，控制上述计数器增加预定值，得到目标计数次数；在预定时间内，上述目标计数次数超出预定计数次数的情况下，确定上述目标故障类型为上述接插件虚接。若接插件存在虚接的情况下，计算的电压计算值会存在着波动，故在多个采集周期对应的电压计算值均为传感器开路时的电压采集值相同的情况下，控制计数器增加预定值，得到目标计数次数。若预定时间内，目标计数次数超出预定计数次数的情况下，确定接插件的目标故障类型为接插件虚接，这样可以进一步地较为准确地确定出接插件的故障类型。In yet another embodiment of the present application, the electronic control unit further includes a counter, which determines the target fault type of the connector according to at least the calculated voltage values and the collected voltage values at a plurality of the collection time points, including: determining During multiple of the above acquisition cycles,

Whether the corresponding calculated values of the voltages are the same as the collected values of the voltages; if each of the calculated values of the voltages is the same as the collected values of the voltages, control the counters to increase by a predetermined value to obtain the target number of counts; within a predetermined time, the above-mentioned When the target count times exceed the predetermined count times, it is determined that the target fault type is the virtual connection of the connector. If there is a virtual connection of the connector, the calculated voltage value will fluctuate. Therefore, when the voltage calculated values corresponding to multiple acquisition cycles are the same as the voltage acquisition value when the sensor is open, the control counter is increased by a predetermined value. , get the target count times. If the target number of counts exceeds the predetermined number of counts within the predetermined time, it is determined that the target fault type of the connector is a virtual connection of the connector, so that the fault type of the connector can be determined more accurately.

对应的各电压计算值均与电压采集值相同的情况下，控制计数器增加1。Specifically, in the above-mentioned embodiment, the above-mentioned counter is increased by a predetermined value, specifically, it can be increased by 1. That is, in each acquisition cycle,

When the corresponding calculated voltage values are the same as the collected voltage values, the control counter is incremented by 1.

Specifically, the size of the above-mentioned predetermined time can be adjusted according to the actual application situation, which is not limited in this application.

In an embodiment of the present application, the above-mentioned fault determination method further includes: when the time counted by the above-mentioned counter exceeds the above-mentioned predetermined time, controlling the above-mentioned counter to reset. In this way, errors in the target count times of the counter can be further avoided, and inaccurate determination of the target failure type of the docking plug-in can be further avoided.

The embodiment of the present application further provides a fault determination apparatus. It should be noted that the fault determination apparatus of the embodiment of the present application may be used to execute the method for fault determination provided by the embodiment of the present application. The following describes the fault determination device provided by the embodiment of the present application.

FIG. 4 is a schematic structural diagram of a fault determination apparatus according to an embodiment of the present application. The electronic control unit is connected to the sensor at least through a connector. The electronic control unit includes an RC circuit and an analog quantity acquisition module, wherein the analog quantity acquisition module is used to collect the voltage acquisition value of the target detection point, and the target detection point is located in the RC circuit. On the branch between the filter resistor and the filter capacitor, as shown in Figure 4, the fault determination device includes:

The first calculation unit 10 is configured to use a plurality of preset calculation formulas to calculate the voltage value of the target detection point at a collection time point, respectively, to obtain a plurality of voltage calculation values, wherein one of the above-mentioned preset calculation formula corresponds to one of the above-mentioned voltages Calculated value, a plurality of the above collection time points constitute a collection period;

The second calculation unit 20 is configured to calculate the difference between each of the above-mentioned voltage calculation values and the above-mentioned voltage acquisition values to obtain a target difference value, and calculate the ratio of the above-mentioned target difference value to the above-mentioned voltage acquisition value to obtain a plurality of target percentages;

The determining unit 30 is configured to determine the target fault type of the sensor according to at least a plurality of the target percentages and the preset deviation range corresponding to the above collection period, or, at least according to the above-mentioned voltage calculation value and the above-mentioned voltage of the plurality of above-mentioned collection periods. Collect the value to determine the target fault type of the connector. The target fault type includes at least one of the following: sensor-to-ground short-circuit, sensor-to-power short-circuit, sensor open circuit, and connector virtual connection.

In the above fault determination device, the first calculation unit is configured to use a plurality of preset calculation formulas to calculate the voltage value of the target detection point at a collection time point, respectively, to obtain a plurality of voltage calculation values; the second calculation unit is used to calculate The difference between each of the above-mentioned voltage calculation values and the above-mentioned voltage acquisition values is obtained to obtain a target difference value, and the ratio of the above-mentioned target difference value to the above-mentioned voltage acquisition value is calculated to obtain a plurality of target percentages; the determining unit is configured to correspond to at least one of the above-mentioned acquisition periods The target fault type of the sensor is determined, or the target fault type of the connector is determined at least according to the voltage calculation value and the voltage acquisition value of a plurality of the above collection periods. In this solution, multiple preset calculation formulas are collected, and multiple voltage calculation values of the target detection point at the same collection time point are calculated respectively; and then the same collection time point is determined according to the multiple voltage calculation values and voltage collection values. Finally, the target fault type of the sensor is determined at least according to the multiple target percentages corresponding to one collection period and the preset deviation range, or at least according to the voltage calculation value and the voltage collection value corresponding to the multiple collection periods, the connection is determined. The target failure type for the plugin. That is to say, in this scheme, the target fault type of the sensor or the connector can be determined ingeniously by calculating the voltage calculation value of the target detection point. Since this solution does not need to change the internal circuit of the electronic control unit, and does not need to increase the cost of hardware, the cost of the fault determination method of this solution is guaranteed to be low, and the fault type of the sensor or connector can be determined only through the above fault determination method. Thus, the problem that it is difficult to determine the fault type of the connector or the sensor in the prior art is solved.

Specifically, the above-mentioned sensor is a sensor connected to the electronic control unit through a connector and a wire harness. The above-mentioned connector is a connector connected to the electronic control unit.

Specifically, as shown in FIG. 2 and FIG. 3 , the electronic control unit 100 has an RC circuit and an analog quantity acquisition module 200 inside, wherein the RC circuit includes a filter capacitor 300 and a filter resistor 400 , and the target detection point 900 is located at the filter capacitor 300 and the branch between the filter resistor 400. In addition, the RC circuit may further include an electrostatic capacitor 600 and a pull-down resistor 500 (as shown in FIG. 2 ), or a pull-up resistor 800 (as shown in FIG. 3 ). Wherein, the sensor 700 is connected to the electronic control unit 100 through a wire harness with connectors at both ends (not shown in FIG. 2 and FIG. 3 ).

In a specific embodiment of the present application, for example, if a collection period is 10 minutes, the voltage calculation value of the target detection point is calculated every 1 minute, that is, a collection period includes 10 collection time points, and in each At the acquisition time point, a plurality of preset calculation formulas are used to calculate the voltage value of the target detection point respectively, such that one acquisition time point corresponds to multiple voltage calculation values and one voltage acquisition value, and then each voltage calculation value and the voltage acquisition value are calculated separately. The difference between the values is obtained to obtain multiple target differences, and then the ratio of each target difference to the voltage acquisition value is calculated to obtain multiple target percentages, such that one acquisition time point corresponds to multiple target percentages. Subsequently, the target fault type of the sensor may be determined at least according to multiple target percentages and preset deviation ranges corresponding to one collection period, or the target fault type of the connector may be determined at least according to the voltage calculation value and voltage collection value of multiple collection periods, This further ensures that the determined target fault type of the sensor or connector is more accurate.

Of course, in an actual application process, one collection period and the number of multiple collection time points included in one collection period can be adjusted according to actual application conditions.

计算上述目标检测点的电压值，得到上述第一电压计算值，其中，R₂为上述滤波电阻的电阻值，C₂为上述滤波电容的电容值，t为当前的上述采集时间点与上一次的上述采集时间点的时间间隔，U1为上述传感器的输入电压，VF1为上述第一电压计算值；上述第二计算模块用于采用

计算上述目标检测点的电压值，得到上述第二电压计算值，其中，R₁为上述RC电路中的上拉电阻或者下拉电阻的电阻值，VF2为上述第二电压计算值；上述第三计算模块用于采用

计算上述目标检测点的电压值，得到上述第三电压计算值，VF3为上述第三电压计算值。在该实施例中，对于同一个采集时间点，分别采用不同的预设计算公式，计算目标检测点的电压计算值，后续根据多个采集时间点的多个电压计算值以及多个电压采集值，确定传感器的目标故障类型，这样可以进一步地较为巧妙地确定出传感器的目标故障类型。In an embodiment of the present application, the voltage calculation value includes a first voltage calculation value, a second voltage calculation value, and a third voltage calculation value, and the first calculation unit includes a first calculation module, a second calculation module, and a third calculation module. A calculation module, wherein the above-mentioned first calculation module is used for adopting

Calculate the voltage value of the above-mentioned target detection point to obtain the above-mentioned first calculated voltage value, wherein R ₂ is the resistance value of the above-mentioned filter resistor, C ₂ is the capacitance value of the above-mentioned filter capacitor, and t is the current above-mentioned collection time point and the last time The time interval of the above-mentioned collection time points, U1 is the input voltage of the above-mentioned sensor, VF1 is the above-mentioned calculated value of the first voltage; the above-mentioned second calculation module is used to adopt

Calculate the voltage value of the target detection point to obtain the second voltage calculation value, where R1 is the resistance value of the pull-up resistor or pull _- down resistor in the RC circuit, and VF2 is the second voltage calculation value; The third calculation module for adopting

Calculate the voltage value of the target detection point to obtain the third voltage calculation value, and VF3 is the third voltage calculation value. In this embodiment, for the same collection time point, different preset calculation formulas are respectively used to calculate the voltage calculation value of the target detection point, and then according to the multiple voltage calculation values and the multiple voltage collection values of the multiple collection time points , to determine the target fault type of the sensor, so that the target fault type of the sensor can be further determined more subtly.

In order to further determine the target fault type of the sensor more simply, in another embodiment of the present application, the target fault type of the above-mentioned sensor is determined at least according to a plurality of above-mentioned target percentages corresponding to one above-mentioned collection period and a preset deviation range, The method includes: at the current collection time point, determining the preset calculation formula corresponding to the voltage calculation value lower than the first preset threshold as the target calculation formula, or determining the voltage higher than the second preset threshold The above-mentioned preset calculation formula corresponding to the calculated value is determined as the above-mentioned target calculation formula; in the first N above-mentioned collection time points of the current above-mentioned collection time point, if each of the above-mentioned target percentages corresponding to the above-mentioned target calculation formula is in the corresponding above-mentioned Within the preset deviation range, the target fault type of the sensor is determined according to the fault type corresponding to the target calculation formula, wherein N is less than or equal to the total number of the above-mentioned collection time points in one of the above-mentioned collection periods.

Specifically, the first preset threshold may be the voltage threshold exceeding the lower limit of the target detection point, and the second preset threshold may be the voltage threshold exceeding the upper limit of the target detection point. When a typical analog signal is a voltage-type signal or a resistance-type signal of 0-5V, the first preset threshold may be 0V, and the second preset threshold may be 5V.

Specifically, one collection period may correspond to a preset deviation range, and of course, each collection time point may also correspond to a preset deviation range. In the present application, this is not limited.

Specifically, in the above-mentioned embodiment, if the current collection time point is the first collection time point of a collection period, then the first N above-mentioned collection time points of the collection time point may be the first collection time point in the previous collection period. N acquisition time points. If in the same collection period, the total number of all collection time points before the current collection time point does not satisfy N, multiple collection time points in the previous collection period may also be taken. In the present application, this is not limited. In the actual application process, N can be adjusted according to the actual situation.

的情况下，确定上述目标故障类型为上述传感器对地短路；上述第二确定子模块用于上述目标计算公式为

的情况下，确定上述目标故障类型为上述传感器开路；上述第三确定子模块用于在上述目标计算公式为

的情况下，确定上述目标故障类型为上述传感器对电源短路。在该实施例中，根据预设计算公式对应的故障类型，确定传感器的目标故障类型，这样可以进一步地较为简单地确定出传感器的目标故障类型。In another embodiment of the present application, the second determination module includes a first determination sub-module, a second determination sub-module, and a third determination sub-module, wherein the first determination sub-module is used for the target calculation formula:

Under the condition of

Under the condition of

In the case of , it is determined that the above-mentioned target fault type is the short-circuit of the above-mentioned sensor to the power supply. In this embodiment, the target fault type of the sensor is determined according to the fault type corresponding to the preset calculation formula, so that the target fault type of the sensor can be further determined relatively simply.

对应的上述电压计算值是否均与上述电压采集值相同；上述控制模块用于在各上述电压计算值均与上述电压采集值相同的情况下，控制上述计数器增加预定值，得到目标计数次数；上述第四确定模块用于在预定时间内，上述目标计数次数超出预定计数次数的情况下，确定上述目标故障类型为上述接插件虚接。若接插件存在虚接的情况下，计算的电压计算值会存在着波动，故在多个采集周期对应的电压计算值均为传感器开路时的电压采集值相同的情况下，控制计数器增加预定值，得到目标计数次数。若预定时间内，目标计数次数超出预定计数次数的情况下，确定接插件的目标故障类型为接插件虚接，这样可以进一步地较为准确地确定出接插件的故障类型。In yet another embodiment of the present application, the electronic control unit further includes a counter, and the determination unit further includes a third determination module, a control module, and a fourth determination module, wherein the third determination module is used to determine a plurality of the above During the acquisition period,

Whether the corresponding calculated values of the above-mentioned voltages are the same as the above-mentioned collected voltage values; the above-mentioned control module is configured to control the above-mentioned counter to increase a predetermined value to obtain the target count times when each of the above-mentioned calculated values of the above-mentioned voltages is the same as the above-mentioned voltage collected values; the above-mentioned The fourth determining module is configured to determine that the target fault type is the virtual connection of the connector when the target number of counts exceeds the predetermined number of counts within a predetermined time. If there is a virtual connection of the connector, the calculated voltage value will fluctuate. Therefore, when the voltage calculated values corresponding to multiple acquisition cycles are the same as the voltage acquisition value when the sensor is open, the control counter is increased by a predetermined value. , get the target count times. If the target number of counts exceeds the predetermined number of counts within the predetermined time, it is determined that the target fault type of the connector is a virtual connection of the connector, so that the fault type of the connector can be determined more accurately.

对应的各电压计算值均与电压采集值相同的情况下，控制计数器增加1。Specifically, in the above-mentioned embodiment, the above-mentioned counter is increased by a predetermined value, specifically, it can be increased by 1. That is, in each acquisition cycle,

When the corresponding calculated voltage values are the same as the collected voltage values, the control counter is incremented by 1.

Specifically, the size of the above-mentioned predetermined time can be adjusted according to the actual application situation, which is not limited in this application.

In an embodiment of the present application, the above-mentioned fault determination device further includes a control unit, configured to control the above-mentioned counter to reset when the time counted by the above-mentioned counter exceeds the above-mentioned predetermined time. In this way, errors in the target count times of the counter can be further avoided, and inaccurate determination of the target failure type of the docking plug-in can be further avoided.

The above-mentioned fault determination device includes a processor and a memory, and the above-mentioned first calculation unit, the second calculation unit and the determination unit are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to realize corresponding functions. .

The processor contains a kernel, and the kernel calls the corresponding program unit from the memory. One or more kernels can be set, and the problem that it is difficult to determine the fault type of a connector or a sensor in the prior art can be solved by adjusting kernel parameters.

Memory may include non-persistent memory in computer readable media, random access memory (RAM) and/or non-volatile memory, such as read only memory (ROM) or flash memory (flash RAM), the memory including at least one memory chip.

An embodiment of the present invention provides a computer-readable storage medium on which a program is stored, and when the program is executed by a processor, the above-mentioned fault determination method is implemented.

An embodiment of the present invention provides a processor, where the processor is configured to run a program, wherein the above-mentioned fault determination method is executed when the above-mentioned program is running.

In a typical embodiment of the present application, an electronic control unit is further provided, and the electronic control unit includes a fault determination device, and the fault determination device is configured to execute any one of the above fault determination methods.

The above-mentioned electronic control unit includes the above-mentioned fault determination device, and the above-mentioned fault determination device is configured to execute any one of the above-mentioned fault determination methods. In the above-mentioned fault determination method, first, at a collection time point, a plurality of preset calculation formulas are used to calculate the voltage values of the target detection points respectively, so as to obtain a plurality of voltage calculation values; Determine a plurality of target difference values according to each of the above-mentioned target difference values and the above-mentioned voltage acquisition values, and determine a plurality of target percentages according to each of the above-mentioned target difference values and the above-mentioned voltage acquisition values; finally, according to at least a plurality of above-mentioned target percentages corresponding to one of the above-mentioned acquisition periods and a preset deviation range to determine the target fault type of the sensor, or at least determine the target fault type of the connector according to the voltage calculation value and the voltage acquisition value of a plurality of acquisition cycles. In this solution, multiple preset calculation formulas are collected, and multiple voltage calculation values of the target detection point at the same collection time point are calculated respectively; and then the same collection time point is determined according to the multiple voltage calculation values and voltage collection values. Finally, the target fault type of the sensor is determined at least according to the multiple target percentages corresponding to one collection period and the preset deviation range, or at least according to the voltage calculation value and the voltage collection value corresponding to the multiple collection periods, the connection is determined. The target failure type for the plugin. That is to say, in this scheme, the target fault type of the sensor or the connector can be determined ingeniously by calculating the voltage calculation value of the target detection point. Since this solution does not need to change the internal circuit of the electronic control unit, and does not need to increase the cost of hardware, the cost of the fault determination method of this solution is guaranteed to be low, and the fault type of the sensor or connector can be determined only through the above fault determination method. Thus, the problem that it is difficult to determine the fault type of the connector or the sensor in the prior art is solved.

An embodiment of the present invention provides a device. The device includes a processor, a memory, and a program stored in the memory and running on the processor. The processor implements at least the following steps when executing the program:

Step S101, using a plurality of preset calculation formulas to calculate the voltage value of the target detection point at a collection time point, respectively, to obtain a plurality of voltage calculation values, wherein one of the above-mentioned preset calculation formula corresponds to one of the above-mentioned voltage calculation values, and a plurality of voltage calculation values are obtained. The above collection time points constitute a collection period;

Step S102, calculating the difference between each of the above-mentioned calculated voltage values and the above-mentioned voltage acquisition value to obtain a target difference value, and calculating the ratio of the above-mentioned target difference value to the above-mentioned voltage acquisition value to obtain a plurality of target percentages;

Step S103: Determine the target fault type of the sensor according to at least a plurality of the target percentages and a preset deviation range corresponding to the above collection period, or, at least according to the above-mentioned voltage calculation value and the above-mentioned voltage collection value of the plurality of above-mentioned collection periods, Determine the target fault type of the connector, and the target fault type includes at least one of the following: sensor-to-ground short-circuit, sensor-to-power short-circuit, sensor open-circuit, and connector virtual connection.

The devices in this article can be servers, PCs, PADs, mobile phones, and so on.

The present application also provides a computer program product that, when executed on a data processing device, is adapted to execute a program initialized with at least the following method steps:

Step S101, using a plurality of preset calculation formulas to calculate the voltage value of the target detection point at a collection time point, respectively, to obtain a plurality of voltage calculation values, wherein one of the above-mentioned preset calculation formula corresponds to one of the above-mentioned voltage calculation values, and a plurality of voltage calculation values are obtained. The above collection time points constitute a collection period;

Step S102, calculating the difference between each of the above-mentioned calculated voltage values and the above-mentioned voltage acquisition value to obtain a target difference value, and calculating the ratio of the above-mentioned target difference value to the above-mentioned voltage acquisition value to obtain a plurality of target percentages;

Step S103: Determine the target fault type of the sensor according to at least a plurality of the target percentages and a preset deviation range corresponding to the above collection period, or, at least according to the above-mentioned voltage calculation value and the above-mentioned voltage collection value of the plurality of above-mentioned collection periods, Determine the target fault type of the connector, and the target fault type includes at least one of the following: sensor-to-ground short-circuit, sensor-to-power short-circuit, sensor open-circuit, and connector virtual connection.

In the above-mentioned embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the above-mentioned units may be a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated. to another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of units or modules, and may be in electrical or other forms.

The units described above as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

If the above-mentioned integrated units are implemented in the form of software functional units and sold or used as independent products, they may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , which includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the above-mentioned methods in various embodiments of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes .

From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

1) In the fault determination method of the present application, first, at a collection time point, a plurality of preset calculation formulas are used to calculate the voltage value of the target detection point respectively, and a plurality of voltage calculation values are obtained; then, according to one of the above collection time points A plurality of calculated voltage values and voltage acquisition values corresponding to the points, determine a plurality of target difference values, and determine a plurality of target percentages according to each of the above target difference values and the above voltage acquisition values; Determine the target fault type of the sensor, or at least determine the target fault type of the connector according to the voltage calculation value and the voltage acquisition value of a plurality of the above-mentioned collection periods. In this solution, multiple preset calculation formulas are collected, and multiple voltage calculation values of the target detection point at the same collection time point are calculated respectively; and then the same collection time point is determined according to the multiple voltage calculation values and voltage collection values. Finally, the target fault type of the sensor is determined at least according to the multiple target percentages corresponding to one collection period and the preset deviation range, or at least according to the voltage calculation value and the voltage collection value corresponding to the multiple collection periods, the connection is determined. The target failure type for the plugin. That is to say, in this scheme, the target fault type of the sensor or the connector can be determined ingeniously by calculating the voltage calculation value of the target detection point. Since this solution does not need to change the internal circuit of the electronic control unit, and does not need to increase the cost of hardware, the cost of the fault determination method of this solution is guaranteed to be low, and the fault type of the sensor or connector can be determined only through the above fault determination method. Thus, the problem that it is difficult to determine the fault type of the connector or the sensor in the prior art is solved.

2) In the fault determination device of the present application, the first calculation unit is configured to use a plurality of preset calculation formulas to calculate the voltage value of the above-mentioned target detection point at a collection time point, respectively, to obtain a plurality of voltage calculation values; the second calculation The unit is used to calculate the difference between each of the above-mentioned voltage calculation values and the above-mentioned voltage acquisition values to obtain the target difference value, and to calculate the ratio of the above-mentioned target difference value to the above-mentioned voltage acquisition value to obtain a plurality of target percentages; the determining unit is used for at least one A plurality of the above target percentages and preset deviation ranges corresponding to the above collection periods are used to determine the target fault type of the above sensors, or, at least according to the above voltage calculated values and the above voltage collection values of the above collection periods, the above-mentioned connector is determined. Target failure type. In this solution, multiple preset calculation formulas are collected, and multiple voltage calculation values of the target detection point at the same collection time point are calculated respectively; and then the same collection time point is determined according to the multiple voltage calculation values and voltage collection values. Finally, the target fault type of the sensor is determined at least according to the multiple target percentages corresponding to one collection period and the preset deviation range, or at least according to the voltage calculation value and the voltage collection value corresponding to the multiple collection periods, the connection is determined. The target failure type for the plugin. That is to say, in this scheme, the target fault type of the sensor or the connector can be determined ingeniously by calculating the voltage calculation value of the target detection point. Since this solution does not need to change the internal circuit of the electronic control unit, and does not need to increase the cost of hardware, the cost of the fault determination method of this solution is guaranteed to be low, and the fault type of the sensor or connector can be determined only through the above fault determination method. Thus, the problem that it is difficult to determine the fault type of the connector or the sensor in the prior art is solved.

3) The electronic control unit of the present application includes the above-mentioned fault determination device, and the above-mentioned fault determination device is used to execute any one of the above-mentioned fault determination methods. In the above fault determination method, first, at a collection time point, a plurality of preset calculation formulas are used to calculate the voltage value of the target detection point respectively, and a plurality of voltage calculation values are obtained; The calculated voltage value and the voltage acquisition value, determine multiple target difference values, and determine multiple target percentages according to each of the above-mentioned target difference values and the above-mentioned voltage acquisition values; finally, according to at least a plurality of the above-mentioned target percentages corresponding to the above-mentioned acquisition period and The preset deviation range is used to determine the target fault type of the sensor, or, at least, the target fault type of the connector is determined according to the voltage calculation value and the voltage acquisition value of the plurality of acquisition cycles. In this solution, multiple preset calculation formulas are collected, and multiple voltage calculation values of the target detection point at the same collection time point are calculated respectively; and then the same collection time point is determined according to the multiple voltage calculation values and voltage collection values. Finally, the target fault type of the sensor is determined at least according to the multiple target percentages corresponding to one collection period and the preset deviation range, or at least according to the voltage calculation value and the voltage collection value corresponding to the multiple collection periods, the connection is determined. The target failure type for the plugin. That is to say, in this scheme, the target fault type of the sensor or the connector can be determined ingeniously by calculating the voltage calculation value of the target detection point. Since this solution does not need to change the internal circuit of the electronic control unit, and does not need to increase the cost of hardware, the cost of the fault determination method of this solution is guaranteed to be low, and the fault type of the sensor or connector can be determined only through the above fault determination method. Thus, the problem that it is difficult to determine the fault type of the connector or the sensor in the prior art is solved.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims (10)

1. A fault determination method, the electronic control unit is connected to the sensor at least through a connector, and the electronic control unit comprises an RC circuit and an analog quantity acquisition module, wherein the analog quantity acquisition module is used to collect the voltage acquisition of the target detection point. value, the target detection point is located on the branch between the filter resistor and the filter capacitor in the RC circuit, and it is characterized in that, the fault determination method includes: Using multiple preset calculation formulas, respectively calculate the voltage value of the target detection point at a collection time point, and obtain multiple voltage calculation values, wherein one preset calculation formula corresponds to one voltage calculation value, and multiple voltage calculation values are obtained. The collection time point constitutes a collection period; Calculate the difference between each of the calculated voltage values and the voltage collected value to obtain a target difference value, and calculate the ratio of the target difference value to the voltage collected value to obtain multiple target percentages; Determining the target fault type of the sensor according to at least a plurality of the target percentages corresponding to one of the collection periods and a preset deviation range, or at least according to the calculated voltage values and the voltage of the plurality of collection periods Collect values to determine the target fault type of the connector, where the target fault type includes at least one of the following: sensor-to-ground short-circuit, sensor-to-power short-circuit, sensor open circuit, and connector virtual connection. 2 . The fault determination method according to claim 1 , wherein the voltage calculation value includes a first voltage calculation value, a second voltage calculation value and a third voltage calculation value, and a plurality of preset calculation formulas are used, respectively. 3 . Calculate the voltage value of the target detection point at a collection time point, and obtain a plurality of voltage calculation values, including: use

Calculate the voltage value of the target detection point to obtain the first calculated voltage value, where R ₂ is the resistance value of the filter resistor, C ₂ is the capacitance value of the filter capacitor, and t is the current acquisition The time interval between the time point and the last acquisition time point, U1 is the input voltage of the sensor, and VF1 is the calculated value of the first voltage; use

Calculate the voltage value of the target detection point to obtain the second voltage calculation value, wherein R1 is the resistance value of the pull-up resistor or pull _- down resistor in the RC circuit, and VF2 is the second voltage calculation value; use

Calculate the voltage value of the target detection point to obtain the third voltage calculation value, where VF3 is the third voltage calculation value. 3. The fault determination method according to claim 1, wherein determining the target fault type of the sensor according to at least a plurality of the target percentages corresponding to one of the collection periods and a preset deviation range, comprising: At the current collection time point, the preset calculation formula corresponding to the voltage calculation value lower than the first preset threshold value is determined as the target calculation formula, or the preset calculation formula higher than the second preset threshold value is determined as the target calculation formula. The preset calculation formula corresponding to the voltage calculation value is determined as the target calculation formula; In the first N collection time points of the current collection time point, if each of the target percentages corresponding to the target calculation formula is within the corresponding preset deviation range, according to the target calculation formula For the corresponding fault type, the target fault type of the sensor is determined, wherein N is less than or equal to the total number of the collection time points in one collection period. 4. The fault determination method according to claim 3, wherein determining the target fault type of the sensor according to the fault type corresponding to the target calculation formula, comprising: The target calculation formula is

In the case of , determine that the target fault type is a short circuit of the sensor to ground; The target calculation formula is

In the case of , determine that the target fault type is the sensor open circuit; The target calculation formula is

In the case of , it is determined that the target fault type is a short circuit of the sensor to the power supply. 5 . The fault determination method according to claim 1 , wherein the electronic control unit further comprises a counter, which determines the The target fault type of the connector, including: determine a number of the acquisition cycles,

Whether the corresponding calculated voltage values are the same as the collected voltage values; In the case that each of the calculated voltage values is the same as the collected voltage value, controlling the counter to increase by a predetermined value to obtain a target number of counts; Within a predetermined time, when the target number of counts exceeds the predetermined number of counts, it is determined that the target fault type is virtual connection of the connector. 6. The fault determination method according to claim 5, wherein the fault determination method further comprises: In a case where the time counted by the counter exceeds the predetermined time, the counter is controlled to be reset. 7. A fault determination device, an electronic control unit is connected to a sensor at least through a connector, and the electronic control unit comprises an RC circuit and an analog quantity acquisition module, wherein the analog quantity acquisition module is used to collect voltage acquisition at a target detection point value, the target detection point is located on the branch between the filter resistor and the filter capacitor in the RC circuit, and it is characterized in that, the fault determination device includes: The first calculation unit is configured to use a plurality of preset calculation formulas to calculate the voltage value of the target detection point at a collection time point, respectively, to obtain a plurality of voltage calculation values, wherein one of the preset calculation formulas corresponds to each of the predetermined calculation formulas. the calculated value of the voltage, and a plurality of the collection time points constitute a collection period; The second calculation unit is configured to calculate the difference between each of the calculated voltage values and the collected voltage values to obtain a target difference value, and calculate the ratio of the target difference value to the collected voltage value to obtain multiple target percentages ; A determination unit, configured to determine the target fault type of the sensor at least according to a plurality of the target percentages corresponding to one collection period and a preset deviation range, or at least according to the voltage calculation of a plurality of the collection periods value and the voltage collection value to determine the target fault type of the connector, the target fault type includes at least one of the following: sensor-to-ground short-circuit, sensor-to-power short-circuit, sensor open circuit, and connector virtual connection. 8 . A computer-readable storage medium, wherein the computer-readable storage medium comprises a stored program, wherein the program executes the fault determination method according to any one of claims 1 to 6 . 9 . A processor, characterized in that the processor is used to run a program, wherein when the program runs, the fault determination method according to any one of claims 1 to 6 is executed. 10 . An electronic control unit, characterized in that it comprises: a fault determination device, the fault determination device is configured to execute the fault determination method according to any one of claims 1 to 6 .

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