CN111024410B - Power overrun fault detection method and device for vehicle, vehicle and storage medium - Google Patents
Power overrun fault detection method and device for vehicle, vehicle and storage medium Download PDFInfo
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Abstract
The invention discloses a method and a device for detecting a power overrun fault of a vehicle, the vehicle and a storage medium, wherein the method comprises the following steps: reading the actual power and the limited power of a part to be detected of the vehicle at the current time T to obtain first actual power and first limited power; when the difference value of subtracting the first limiting power from the first actual power is larger than a first threshold value, determining whether the actual power at the current moment T of the component to be detected responds to the limiting power according to the rate of reduction of the actual power at the current moment T of the component to be detected and the rate of change of the limiting power; and when the actual power of the part to be detected at the current moment T does not respond to the limit power and the actual power of each moment in a time interval [ T-T, T ] before the current moment T does not respond to the limit power, determining that the part to be detected has a power overrun fault. The invention can improve the accuracy of detecting the power overrun fault of the part to be detected of the vehicle.
Description
Technical Field
The invention relates to the technical field of electric vehicles, in particular to a method and a device for detecting a power overrun fault of a vehicle, the vehicle and a storage medium.
Background
In the power transmission of the electric automobile, the actual power of each component is generally required not to exceed the limit power, so as to prevent the vehicle power from over-discharging and affecting the safety and reliability of the vehicle operation. However, due to the influence of factors such as power loss during power transmission, a battery state of the vehicle, or an operating environment of the vehicle, the actual power of each component of the vehicle may exceed the limit power, and a power overrun fault may occur. Therefore, it is necessary to detect power overrun faults of various components of the vehicle and to perform vehicle protection measures to ensure normal operation of the vehicle.
In the prior art, when detecting whether each component of a vehicle has a power overrun fault, it is usually detected and judged whether the actual power of a certain component exceeds a limit power, and when the actual power exceeds the limit power, it is determined that the component has the power overrun fault, and then subsequent vehicle protection measures are executed.
However, the limit power of each component of the vehicle may change, and after the limit power changes, the actual power responds to the limit power, and the actual power also changes. It is also possible that the actual power may exceed the limit power during a normal response, but this time is not a power overrun fault, but the vehicle's normal power control process. If the scheme in the prior art is adopted, whether a power overrun fault exists in a certain component is detected only according to whether the actual power exceeds the limit power, and the component is possibly falsely detected as the power overrun fault exists when the component is in a normal power control process. Therefore, the prior art solutions fail to accurately detect the presence of power overrun faults in vehicle components.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a method and an apparatus for detecting a power overrun fault of a vehicle, and a storage medium, which can improve the accuracy of detecting the power overrun fault of a to-be-detected component of the vehicle.
In order to solve the above technical problem, in a first aspect, the present invention provides a method for detecting a power overrun fault of a vehicle, the method including:
reading the actual power and the limited power of a part to be detected of the vehicle at the current time T to obtain first actual power and first limited power;
when the difference value of subtracting the first limiting power from the first actual power is larger than a first threshold value, determining whether the actual power at the current moment T of the component to be detected responds to the limiting power according to the rate of reduction of the actual power at the current moment T of the component to be detected and the rate of change of the limiting power;
when the actual power of the part to be detected at the current moment T does not respond to the limit power and the actual power of each moment in a time interval [ T-T, T ] before the current moment T does not respond to the limit power, determining that the part to be detected has a power overrun fault;
determining whether the actual power of the component to be detected at the current time T responds to the limited power according to the rate of decrease of the actual power of the component to be detected at the current time T and the rate of change of the limited power, specifically including:
and when the absolute value of the rate of reducing the actual power of the part to be detected at the current moment T is smaller than a second threshold value and the absolute value of the rate of changing the limited power of the part to be detected at the current moment T is smaller than a third threshold value, determining that the actual power of the part to be detected at the current moment T does not respond to the limited power.
Further, the determining, according to the rate of decrease of the actual power of the component to be detected at the current time T and the rate of change of the limited power, whether the actual power of the component to be detected at the current time T responds to the limited power specifically includes:
and when the absolute value of the rate of reducing the actual power of the component to be detected at the current moment T is not less than a second threshold, or the absolute value of the rate of limiting the power change of the component to be detected at the current moment T is not less than a third threshold, determining that the actual power of the component to be detected at the current moment T responds to the limiting power.
Further, the rate of reducing the actual power of the component to be detected at the current time T is the reduction amount of the actual power of the component to be detected from the previous time T- Δ T to the current time T;
and the limiting power change rate of the current moment T of the part to be detected is the change quantity of the limiting power of the part to be detected from the previous moment T-delta T to the current moment T.
In order to solve the above technical problem, in a second aspect, the present invention further provides a power overrun fault detection apparatus for a vehicle, the apparatus including:
the device comprises an obtaining module, a judging module and a control module, wherein the obtaining module is used for reading the actual power and the limited power of a part to be detected of a vehicle at the current time T to obtain a first actual power and a first limited power;
a first determining module, configured to determine whether the actual power at the current time T of the component to be detected responds to the limited power according to a rate of decrease of the actual power at the current time T of the component to be detected and a rate of change of the limited power when a difference between the first actual power and the first limited power is greater than a first threshold;
the second determining module is used for determining that the component to be detected has a power overrun fault when the actual power of the component to be detected at the current moment T does not respond to the limit power and the actual power of each moment in a time interval [ T-T, T ] before the current moment T does not respond to the limit power;
the first determining module is specifically configured to:
and when the absolute value of the rate of reducing the actual power of the part to be detected at the current moment T is smaller than a second threshold value and the absolute value of the rate of changing the limited power of the part to be detected at the current moment T is smaller than a third threshold value, determining that the actual power of the part to be detected at the current moment T does not respond to the limited power.
Further, the first determining module is specifically configured to:
and when the absolute value of the rate of reducing the actual power of the component to be detected at the current moment T is not less than a second threshold, or the absolute value of the rate of limiting the power change of the component to be detected at the current moment T is not less than a third threshold, determining that the actual power of the component to be detected at the current moment T responds to the limiting power.
Further, the rate of reducing the actual power of the component to be detected at the current time T is the reduction amount of the actual power of the component to be detected from the previous time T- Δ T to the current time T;
and the limiting power change rate of the current moment T of the part to be detected is the change quantity of the limiting power of the part to be detected from the previous moment T-delta T to the current moment T.
In order to solve the above technical problem, in a third aspect, the present invention further provides a vehicle, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor, when executing the computer program, implements the power overrun fault detection method for the vehicle according to any one of the aspects.
In order to solve the above technical problem, in a fourth aspect, the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, and when the computer program runs, the apparatus on which the computer-readable storage medium is located is controlled to execute the power overrun fault detection method for a vehicle according to any one of the aspects provided in the first aspect.
According to the method, the device, the vehicle and the storage medium for detecting the power overrun fault of the vehicle, the power overrun fault of a component to be detected can be detected and judged in a multi-dimensional manner according to the difference condition of the actual power and the limited power, the condition that the actual power does not respond to the limited power determined based on the reduction rate of the actual power and the change rate of the limited power, and the duration time meeting the conditions, so that the normal overrun process caused by the non-power overrun fault is eliminated, the false detection is reduced, and the accuracy of detecting the power overrun fault of the component to be detected of the vehicle can be improved.
Drawings
FIG. 1 is a schematic flow chart diagram of a preferred embodiment of a method for detecting an over-power fault in a vehicle according to the present invention;
FIG. 2 is a schematic diagram of the variation of the actual power and the limited power of the part to be detected provided by the present invention;
FIG. 3 is a schematic structural diagram of a preferred embodiment of a power overrun fault detection apparatus for a vehicle provided by the present invention;
fig. 4 is a schematic structural diagram of a preferred embodiment of a vehicle provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The present invention provides a method for detecting a power overrun fault of a vehicle, please refer to fig. 1, fig. 1 is a schematic flow chart of a preferred embodiment of the method for detecting a power overrun fault of a vehicle provided by the present invention; specifically, the method comprises the following steps:
s1, reading the actual power and the limited power of the part to be detected of the vehicle at the current time T to obtain a first actual power and a first limited power;
s2, when the difference value of the first actual power minus the first limiting power is larger than a first threshold value, determining whether the actual power at the current moment T of the component to be detected responds to the limiting power according to the rate of reduction of the actual power at the current moment T of the component to be detected and the rate of change of the limiting power;
s3, when the actual power of the part to be detected at the current moment T does not respond to the power limitation and the actual power of each moment in the time interval [ T-T, T ] before the current moment T does not respond to the power limitation, determining that the part to be detected has the power overrun fault.
It should be noted that the limited power is the maximum power limit value provided by the vehicle to the component to be detected, and if the component to be detected is stably and normally controlled, the actual power does not exceed the limited power. The limited power can be continuously adjusted due to the fact that the vehicle operation state changes at multiple ends, for example, the limited power of the component to be detected is originally 2500W, and is gradually reduced within a certain time and is finally changed into 2000W after adjustment, during the period, the actual power of the component to be detected can be gradually reduced in response to the change of the limited power under normal conditions, but may be affected by aging of some components of the vehicle or other reasons, when the vehicle adjusts the actual power of the component to be detected, the rate of reduction of the actual power is likely to be slightly low, but as long as the actual power is gradually reduced in a certain degree of reduction trend, even if the actual power is greater than the limited power in the reduction process, the actual power can be considered as a normal power adjusting process of the vehicle, the process that the actual power normally responds to the limited power is considered, and the component to be detected has a power overrun fault.
It should be noted that the actual power reduction rate refers to a reduction amount of the actual power of the component to be detected in a unit detection period, so that if the actual power at the current time is increased compared with the actual power at the previous time, the actual power at the current time is not reduced but increased, and at this time, the actual power reduction rate defaults to 0, and may also be set to other values that do not affect the implementation of the technical solution provided by the present invention.
It should be noted that t is a preset time length, and the first threshold is a preset value greater than 0. As shown in fig. 2, assuming that the difference between the actual power of the component to be detected minus the limiting power at time T2 is just equal to the first threshold value, assuming that the actual power of the component to be detected does not respond to the limiting power at time T3, the time difference between time T4 and time T3 is T. The following describes the implementation process of this embodiment by taking the change process of the actual power and the limited power shown in fig. 2 as an example:
in specific implementation, as shown in fig. 2, if the current time T is any time within [0, T1], reading the actual power and the limited power of the component to be detected of the vehicle at the current time T to obtain a first actual power and a first limited power, where the first actual power does not exceed the first limited power, that is, it is determined that a difference between the first actual power and the first limited power is not greater than a first threshold, it is determined that the component to be detected does not have the power overrun fault at any time within [0, T1], and the detection and monitoring of the power overrun fault are continued.
And if the current time T is any time within [ T1, T2), reading the actual power and the limited power of the part to be detected of the vehicle at the current time T to obtain a first actual power and a first limited power. Although the first actual power exceeds the first limit power and the power overrun is started at the time T1, the difference between the first actual power and the first limit power is not larger than the first threshold, during which the power overrun may be caused only by small fluctuation of the actual power of the component to be detected, or the power overrun may be caused by the fact that the actual power of the component to be detected is in the process of normally responding to the limit power, that is, at any time when the current time T is [ T1, T2 ], and the power overrun is not necessarily caused by the power overrun fault. Therefore, at any time in [ T1, T2 ], the power overrun fault of the component to be detected is not determined, and the detection and the monitoring of the power overrun fault are continuously carried out.
If the current time T is any time within [ T2, T3], reading the actual power and the limited power of the component to be detected of the vehicle at the current time T to obtain a first actual power and a first limited power, where the first actual power is greater than the first limited power, and a difference between the first actual power and the first limited power is greater than a first threshold, it is necessary to consider whether the power overrun at the current time is a normal power control process of the component to be detected, that is, it is necessary to further determine whether the actual power at the current time T of the component to be detected responds to the limited power. When the vehicle controls the actual power of the component to be detected to respond to the limited power, the rate of reduction of the actual power of the component to be detected and the rate of change of the limited power meet certain requirements, and the requirements specifically met by the rate of reduction of the actual power and the rate of change of the limited power are different for different vehicles and different components to be detected. Therefore, the invention determines whether the actual power of the part to be detected at the current moment T responds to the limited power or not through the rate of reduction of the actual power and the rate of change of the limited power. As shown in fig. 2, at any time within [ T2, T3), it is determined that the actual power of the component to be detected at the current time T responds to the limited power according to the rate of decrease of the actual power of the component to be detected and the rate of change of the limited power, and then it is not determined at every time within this time period that the component to be detected has the power overrun fault, and the detection and monitoring of the power overrun fault are continued.
If the current time T is T3, reading the actual power and the limited power of the component to be detected at the current time to obtain a first actual power and a first limited power; after the difference value obtained by subtracting the first limiting power from the first actual power is calculated and determined to be larger than the first threshold value, determining that the actual power of the component to be detected does not respond to the limiting power at the current moment according to the rate of reducing the actual power of the component to be detected at the current moment and the rate of changing of the limiting power; further, in the time interval [ T3-T, T3] before the current time T3, the actual power at each time does not respond to the limited power, the actual power only at the time T3 does not respond to the limited power, and the state that the actual power does not respond to the limited power does not last for the time period T, at this time, it is likely that the operation state of the vehicle is unstable, and the component to be detected does not necessarily have the power overrun fault, so that the component to be detected is not determined to have the power overrun fault, and the detection and monitoring of the power overrun fault are continued.
After continuous detection, similar to the time T3, when the current time T is any time within (T3, T4), since the actual power at each time is not unresponsive to the limited power in the time interval [ T-T, T ] before the current time T, at any time within (T3, T4) the current time T is not certain that the component to be detected has the power overrun fault, and the detection and monitoring of the power overrun fault are continued.
And continuously detecting whether the power overrun fault exists in the component to be detected, if the current time T is the time T4, calculating and determining that the difference value of the first actual power minus the first limit power is larger than a first threshold value, and further determining that the actual power of the component to be detected at the current time T4 does not respond to the limit power according to the rate of reduction of the actual power of the component to be detected at the current time and the rate of change of the limit power. And the actual power of the part to be detected at each moment in the time interval [ T4-T, T4] before the current moment T4 (namely, in the time interval [ T3, T4 ]) does not respond to the limited power, which indicates that the power is over-limited, and the state that the actual power does not respond to the limited power lasts for the time period T, and then at the moment T4, the part to be detected is determined to have the power over-limit fault. And the time T4 is the power overrun fault determination time of the component to be detected. Subsequent vehicle protection measures can be further implemented to ensure normal operation of the vehicle.
It should be noted that the variation process of the actual power and the limited power of the part to be detected in fig. 2 is only an illustration of one variation process, and actually, during the operation of the vehicle, the variation process of the actual power and the limited power has other variation processes besides fig. 2, for example, the limited power may not be kept unchanged as shown in fig. 2, but may be a variation process of increasing or decreasing, etc. It should be noted that the specific value of the first threshold value may be set according to the type of vehicle, the application of the vehicle, and the specific component to be detected.
The method for detecting the power overrun fault of the vehicle can detect and judge the power overrun fault of a component to be detected in a multi-dimensional manner according to the difference condition of the actual power and the limited power, the condition that the actual power does not respond to the limited power determined based on the actual power reduction rate and the limited power change rate, and the duration time of meeting all the conditions, so that the normal overrun process caused by the non-power overrun fault is eliminated, the false detection is reduced, and the accuracy of detecting the power overrun fault of the component to be detected of the vehicle can be improved.
Preferably, the determining whether the actual power of the component to be detected at the current time T responds to the limited power according to the rate of decrease of the actual power of the component to be detected at the current time T and the rate of change of the limited power specifically includes:
and when the absolute value of the rate of reducing the actual power of the part to be detected at the current moment T is smaller than a second threshold value and the absolute value of the rate of changing the limited power of the part to be detected at the current moment T is smaller than a third threshold value, determining that the actual power of the part to be detected at the current moment T does not respond to the limited power.
Specifically, the difference between the actual power and the limited power is greater than a first threshold, and if the actual power is in a power adjustment process that normally responds to the limited power, the absolute value of the rate at which the actual power is reduced needs to be greater than a second threshold. If the absolute value of the rate of change of the limited power is smaller than the third threshold, and the absolute value of the rate of decrease of the actual power is smaller than the second threshold, for example, the actual power is unchanged or the decrease trend is smaller, it may be considered that the actual power at the current time does not respond to the limited power. Based on this, in this embodiment, when the absolute value of the rate of actual power reduction is smaller than the second threshold and the absolute value of the rate of limiting power change is smaller than the third threshold, the present invention determines that the actual power of the component to be detected at the current time T does not respond to the limiting power.
In this embodiment, the component to be detected determines that the power overrun fault exists only when the component to be detected simultaneously satisfies the difference condition between the actual power and the limited power, the rate condition of the actual power reduction, and the limited power change rate condition, and when the duration time that the three conditions are simultaneously satisfied reaches t.
The second threshold and the third threshold may be set according to the type of the vehicle, the application of the vehicle, the specific component to be detected, and the like, and are not limited herein.
Preferably, the determining whether the actual power of the component to be detected at the current time T responds to the limited power according to the rate of decrease of the actual power of the component to be detected at the current time T and the rate of change of the limited power specifically includes:
and when the absolute value of the rate of reducing the actual power of the component to be detected at the current moment T is not less than a second threshold, or the absolute value of the rate of limiting the power change of the component to be detected at the current moment T is not less than a third threshold, determining that the actual power of the component to be detected at the current moment T responds to the limiting power.
Specifically, the difference between the actual power and the limited power is greater than a first threshold, and if the actual power is in a power adjustment process of normally responding to the limited power, the absolute value of the rate of decrease of the actual power needs to be greater than a second threshold. If the absolute value of the rate of change of the limited power is smaller than the third threshold, and the absolute value of the rate of decrease of the actual power is smaller than the second threshold, for example, the actual power is unchanged or the decrease trend is smaller, it may be considered that the actual power at the current time does not respond to the limited power. Based on this, in this embodiment, the present invention determines that the actual power at the current time T of the component to be detected responds to the limit power when the absolute value of the rate of decrease of the actual power is not less than the second threshold, or the absolute value of the rate of change of the limit power is not less than the third threshold.
The second threshold and the third threshold may be set according to the type of the vehicle, the application of the vehicle, the specific component to be detected, and the like, and are not limited herein.
Preferably, the rate of reduction of the actual power of the component to be detected at the current time T is the reduction of the actual power of the component to be detected from the previous time T- Δ T to the current time T;
and the limiting power change rate of the current moment T of the part to be detected is the change quantity of the limiting power of the part to be detected from the previous moment T-delta T to the current moment T.
It should be noted that Δ t is a preset unit detection period, that is, a time interval between two adjacent detection times, for example, if Δ t is set to 10ms, the power overrun fault of the component to be detected is detected once every 1ms, and a specific value of Δ t may be specifically set according to actual needs. It is foreseen that the length of the time period T is a plurality of lengths of Δ T, for example, T is 2s, Δ T is 10ms, and when a difference obtained by subtracting the first limit power from the first actual power is continuously detected for 200 times and is greater than a first threshold, and the actual power of the component to be detected at the current time T does not respond to the limit power, it is determined that the component to be detected has the power overrun fault. In the present embodiment, the rate of reduction of the actual power is the amount of reduction of the actual power in one unit detection period, and the limit power change rate is the amount of change in the limit power in one unit detection period.
The invention provides a power overrun fault detection method of a vehicle, which is implemented specifically, the actual power and the limited power of a part to be detected of the vehicle at the current time T are read to obtain a first actual power and a first limited power; when the difference value of subtracting the first limiting power from the first actual power is larger than a first threshold value, determining whether the actual power of the component to be detected at the current moment T responds to the limiting power or not according to the rate of reduction of the actual power of the component to be detected at the current moment T and the rate of change of the limiting power; and when the actual power of the part to be detected at the current moment T does not respond to the limited power and the actual power of each moment in a time interval [ T-T, T ] before the current moment T does not respond to the limited power, determining that the part to be detected has a power overrun fault.
According to the method for detecting the power overrun fault of the vehicle, provided by the invention, the power overrun fault of a component to be detected can be detected and judged in a multi-dimensional manner according to the difference condition of the actual power and the limited power, the condition that the actual power does not respond to the limited power determined based on the actual power reduction rate and the limited power change rate and the duration time of meeting the conditions, the normal overrun process caused by the non-power overrun fault is eliminated, the false detection is reduced, and the accuracy of detecting the power overrun fault of the component to be detected of the vehicle can be further improved.
Example two
The invention also provides a power overrun fault detection device for a vehicle, please refer to fig. 3, fig. 3 is a schematic structural diagram of a preferred embodiment of the power overrun fault detection device for the vehicle provided by the invention; specifically, the apparatus comprises:
the obtaining module 11 is configured to read actual power and limited power of a component to be detected of a vehicle at a current time T to obtain first actual power and first limited power;
a first determining module 12, configured to determine, when a difference between the first actual power and the first limited power is greater than a first threshold, whether the actual power at the current time T of the component to be detected responds to the limited power according to a rate of decrease of the actual power at the current time T of the component to be detected and a rate of change of the limited power;
the second determining module 13 is configured to determine that a power overrun fault exists in the component to be detected, when the actual power of the component to be detected at the current time T does not respond to the limit power and the actual power of each time within a time interval [ T-T, T ] before the current time T does not respond to the limit power.
Preferably, the first determining module 12 is specifically configured to:
and when the absolute value of the rate of reducing the actual power of the part to be detected at the current moment T is smaller than a second threshold value and the absolute value of the rate of changing the limited power of the part to be detected at the current moment T is smaller than a third threshold value, determining that the actual power of the part to be detected at the current moment T does not respond to the limited power.
Preferably, the first determining module 12 is specifically configured to:
and when the absolute value of the rate of reducing the actual power of the component to be detected at the current moment T is not less than a second threshold, or the absolute value of the rate of limiting the power change of the component to be detected at the current moment T is not less than a third threshold, determining that the actual power of the component to be detected at the current moment T responds to the limiting power.
Preferably, the rate of reduction of the actual power of the component to be detected at the current time T is the reduction of the actual power of the component to be detected from the previous time T- Δ T to the current time T;
and the limiting power change rate of the current moment T of the part to be detected is the change quantity of the limiting power of the part to be detected from the previous moment T-delta T to the current moment T.
The power overrun fault detection device for the vehicle can detect and judge the power overrun fault of a component to be detected in a multi-dimensional manner according to the difference condition of the actual power and the limited power, the condition that the actual power does not respond to the limited power determined based on the actual power reduction rate and the limited power change rate, and the duration time of meeting the conditions, eliminates the normal overrun process caused by the non-power overrun fault, reduces false detection, and further can improve the accuracy of detecting the power overrun fault of the component to be detected of the vehicle.
It should be noted that the power overrun fault detection apparatus for a vehicle provided in the embodiment of the present invention is used to execute the steps of the power overrun fault detection method for a vehicle described in any one of the embodiments, and working principles and beneficial effects of the two are in one-to-one correspondence, so details are not repeated.
It will be understood by those skilled in the art that the schematic diagram of the power overrun fault detection apparatus of the vehicle is merely an example of the power overrun fault detection apparatus of the vehicle, and does not constitute a limitation of the power overrun fault detection apparatus of the vehicle, and may include more or less components than those shown, or combine some components, or different components, for example, the power overrun fault detection apparatus of the vehicle may further include an input-output device, a network access device, a bus, and the like.
EXAMPLE III
The invention also provides a vehicle, please refer to fig. 4, fig. 4 is a schematic structural diagram of a preferred embodiment of the vehicle provided by the invention; the vehicle comprises a processor 10, a memory 20 and a computer program stored in the memory 20 and configured to be executed by the processor 10, wherein the processor 10, when executing the computer program, implements the power overrun fault detection method for the vehicle as provided in any one of the above embodiments.
Specifically, the processor and the memory in the vehicle may be one or more.
The embodiment provides a vehicle including: a processor, a memory and a computer program (such as computer program 1, computer program 2, … … of fig. 4) stored in said memory and operable on said processor. When the processor executes the computer program, implementing the steps in the power overrun fault detection method for the vehicle provided in any one of the above embodiments, for example, step S1 shown in fig. 1, reading the actual power and the limited power of the component to be detected of the vehicle at the current time T, and obtaining a first actual power and a first limited power; or, the processor, when executing the computer program, implements the functions of the modules in the above device embodiments, for example, implements the obtaining module 11, configured to read the actual power and the limited power of the component to be detected of the vehicle at the current time T, and obtain the first actual power and the first limited power.
Illustratively, the computer program may be partitioned into one or more modules/units that are stored in the memory and executed by the processor to implement the invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program in the vehicle. For example, the computer program may be divided into an obtaining module 11, a first determining module 12 and a second determining module 13, and the specific functions of each module are as follows:
the obtaining module 11 is configured to read actual power and limited power of a component to be detected of a vehicle at a current time T to obtain first actual power and first limited power;
a first determining module 12, configured to determine, when a difference between the first actual power and the first limited power is greater than a first threshold, whether the actual power at the current time T of the component to be detected responds to the limited power according to a rate of decrease of the actual power at the current time T of the component to be detected and a rate of change of the limited power;
the second determining module 13 is configured to determine that a power overrun fault exists in the component to be detected, when the actual power of the component to be detected at the current time T does not respond to the limit power and the actual power of each time within a time interval [ T-T, T ] before the current time T does not respond to the limit power.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like that is the control center of the vehicle and connects the various parts of the overall vehicle using various interfaces and wiring.
The memory may be used to store the computer programs and/or modules, and the processor may implement various functions of the vehicle by running or executing the computer programs and/or modules stored in the memory, as well as by invoking data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
Wherein the vehicle integrated module/unit, if implemented in the form of a software functional unit and sold or used as a separate product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method for detecting the power overrun fault of the vehicle provided in any one of the above embodiments may also be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the steps of the method for detecting the power overrun fault of the vehicle provided in any one of the above embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
Example four
The invention also provides a computer readable storage medium, which includes a stored computer program, wherein when the computer program runs, the apparatus in which the computer readable storage medium is located is controlled to execute the method for detecting the power overrun fault of the vehicle as described in any one of the above embodiments.
In summary, the power overrun fault detection method for the vehicle, the power overrun fault detection device for the vehicle, the vehicle and the computer storage medium provided by the invention have the following beneficial effects:
the power overrun fault of the component to be detected can be detected and judged in a multidimensional way according to the difference condition of the actual power and the limited power, the condition that the actual power does not respond to the limited power and the duration time meeting the conditions on the basis of the actual power reduction rate and the limited power change rate, the normal overrun process caused by the non-power overrun fault is eliminated, the false detection is reduced, and the accuracy of detecting the power overrun fault of the component to be detected of the vehicle can be improved.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (8)
1. A method of power overrun fault detection for a vehicle, the method comprising:
reading the actual power and the limited power of a part to be detected of the vehicle at the current time T to obtain first actual power and first limited power;
when the difference value of subtracting the first limiting power from the first actual power is larger than a first threshold value, determining whether the actual power at the current moment T of the component to be detected responds to the limiting power according to the rate of reduction of the actual power at the current moment T of the component to be detected and the rate of change of the limiting power;
when the actual power of the part to be detected at the current moment T does not respond to the limit power and the actual power of each moment in a time interval [ T-T, T ] before the current moment T does not respond to the limit power, determining that the part to be detected has a power overrun fault;
determining whether the actual power of the component to be detected at the current time T responds to the limited power according to the rate of decrease of the actual power of the component to be detected at the current time T and the rate of change of the limited power, specifically including:
and when the absolute value of the rate of reducing the actual power of the part to be detected at the current moment T is smaller than a second threshold value and the absolute value of the rate of changing the limited power of the part to be detected at the current moment T is smaller than a third threshold value, determining that the actual power of the part to be detected at the current moment T does not respond to the limited power.
2. The method according to claim 1, wherein the determining whether the actual power at the current time T of the to-be-detected component responds to the limit power according to the rate of decrease of the actual power at the current time T of the to-be-detected component and the rate of change of the limit power includes:
and when the absolute value of the rate of reducing the actual power of the component to be detected at the current moment T is not less than a second threshold, or the absolute value of the rate of limiting the power change of the component to be detected at the current moment T is not less than a third threshold, determining that the actual power of the component to be detected at the current moment T responds to the limiting power.
3. The power overrun fault detection method of a vehicle according to claim 1,
the actual power reduction rate of the part to be detected at the current moment T is the reduction amount of the actual power of the part to be detected from the previous moment T-delta T to the current moment T;
and the limiting power change rate of the current moment T of the part to be detected is the change quantity of the limiting power of the part to be detected from the previous moment T-delta T to the current moment T.
4. An over-power fault detection device for a vehicle, the device comprising:
the device comprises an obtaining module, a judging module and a control module, wherein the obtaining module is used for reading the actual power and the limited power of a part to be detected of a vehicle at the current time T to obtain a first actual power and a first limited power;
a first determining module, configured to determine whether the actual power at the current time T of the component to be detected responds to the limited power according to a rate of decrease of the actual power at the current time T of the component to be detected and a rate of change of the limited power when a difference between the first actual power and the first limited power is greater than a first threshold;
the second determining module is used for determining that the component to be detected has a power overrun fault when the actual power of the component to be detected at the current moment T does not respond to the limit power and the actual power of each moment in a time interval [ T-T, T ] before the current moment T does not respond to the limit power;
the first determining module is specifically configured to:
and when the absolute value of the rate of reducing the actual power of the part to be detected at the current moment T is smaller than a second threshold value and the absolute value of the rate of changing the limited power of the part to be detected at the current moment T is smaller than a third threshold value, determining that the actual power of the part to be detected at the current moment T does not respond to the limited power.
5. The vehicle over-power fault detection device of claim 4, wherein the first determination module is specifically configured to:
and when the absolute value of the rate of reducing the actual power of the component to be detected at the current moment T is not less than a second threshold, or the absolute value of the rate of limiting the power change of the component to be detected at the current moment T is not less than a third threshold, determining that the actual power of the component to be detected at the current moment T responds to the limiting power.
6. The power overrun fault detection apparatus of a vehicle as claimed in claim 4,
the actual power reduction rate of the part to be detected at the current moment T is the reduction amount of the actual power of the part to be detected from the previous moment T-delta T to the current moment T;
and the limiting power change rate of the current moment T of the part to be detected is the change quantity of the limiting power of the part to be detected from the previous moment T-delta T to the current moment T.
7. A vehicle comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor when executing the computer program implementing the method of over-power fault detection for a vehicle as claimed in any one of claims 1 to 3.
8. A computer-readable storage medium, comprising a stored computer program, wherein the computer program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform a method for detecting an over-power fault of a vehicle according to any one of claims 1 to 3.
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| CN111688701B (en) * | 2020-05-06 | 2022-05-17 | 华人运通(江苏)技术有限公司 | Power overrun control method and device for vehicle and vehicle |
| CN112248878B (en) * | 2020-09-17 | 2022-04-08 | 华人运通(江苏)技术有限公司 | Vehicle power boundary flexible control method and system |
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