CN111137261B - Brake control device and brake distance testing method and system - Google Patents
Brake control device and brake distance testing method and system Download PDFInfo
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- CN111137261B CN111137261B CN201911251747.3A CN201911251747A CN111137261B CN 111137261 B CN111137261 B CN 111137261B CN 201911251747 A CN201911251747 A CN 201911251747A CN 111137261 B CN111137261 B CN 111137261B
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- 238000012360 testing method Methods 0.000 title claims description 15
- 238000001514 detection method Methods 0.000 claims abstract description 68
- 238000005096 rolling process Methods 0.000 claims abstract description 12
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- 239000003990 capacitor Substances 0.000 claims description 18
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/172—Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters
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Abstract
The invention discloses a brake control device, which comprises a detection module and a control panel connected with the detection module; the detection module is used for detecting the rolling action of a vehicle to be detected, generating an indication signal and sending the indication signal to the control panel; the control panel is connected with the control system of the vehicle to be tested and used for sending a control instruction to the control system of the vehicle to be tested after receiving the indication signal, so that the vehicle to be tested is braked to stop. According to the invention, the detection module is used for detecting the indication signal generated by the vehicle to be detected, and the control panel is used for braking the vehicle to be detected according to the indication signal, so that the problem of control advance or control delay caused by the deviation of the hand-eye reaction time is avoided, the detection precision of the braking distance is improved, and the detection cost of the braking distance is reduced.
Description
Technical Field
The invention relates to the technical field of information, in particular to a brake control device and a method and a system for testing a brake distance.
Background
In the detection of the braking distance of a vehicle, the prior art mainly adopts the following two modes:
the method comprises the steps that firstly, a starting line is fixed, when a vehicle moves to the starting line, a control rod or a remote controller is manually loosened to realize braking, and the distance between the starting line and a parking position is used as a braking distance; and secondly, a camera snapshot method is adopted, a high-frequency frame rate camera is started by setting scale marks, a first scale mark where a vehicle is located when a control rod or a remote controller is loosened and a second scale mark where the vehicle is located when the vehicle is parked are recorded, and the distance between the first scale mark and the second scale mark is used as a braking distance.
For the first mode, due to the deviation of the hand-eye reaction time, the consistency of manual control is poor, the brake distance is smaller than the true value due to the advance of control, the brake distance is larger than the true value due to the delay of control, and the detection precision is low. For the second mode, the camera is required to clearly shoot the scale marks, the requirement on the tested pavement is high, the cost is high, and the transportability is poor.
Therefore, finding a method to solve the problems of low precision and high cost existing in the prior art when detecting the braking distance of the vehicle becomes a technical problem that the skilled person needs to solve urgently.
Disclosure of Invention
The embodiment of the invention provides a brake control device and a method and a system for testing a brake distance, and aims to solve the problems of low precision and high cost in the process of detecting the brake distance of a vehicle in the prior art.
A brake control device comprising:
the detection module is connected with the control panel;
the detection module is used for detecting the rolling action of a vehicle to be detected, generating an indication signal and sending the indication signal to the control panel; the control panel is connected with the control system of the vehicle to be tested and used for sending a control instruction to the control system of the vehicle to be tested after receiving the indication signal, so that the vehicle to be tested is braked to stop.
Optionally, the detection module includes:
conductive rubber and a signal trigger circuit;
the conductive rubber is connected with the signal trigger circuit;
the signal trigger circuit is connected with the control board;
when a vehicle to be tested rolls the conductive rubber, the conductive rubber generates a first signal and sends the first signal to the signal trigger circuit, and the signal trigger circuit generates an indication signal according to the first signal and sends the indication signal to the control panel.
Optionally, the signal triggering circuit comprises:
the circuit comprises a voltage stabilizing diode, a first resistor, a second resistor, a third resistor, an N-channel MOS transistor, a first capacitor, a fourth resistor, a fifth resistor, a P-channel MOS transistor, a second capacitor, a sixth resistor, a seventh resistor and a triode;
the negative electrode of the voltage stabilizing diode, the first end of the first resistor, the first end of the first capacitor, the first end of the fourth resistor and the source electrode of the P-channel MOS transistor are connected to an input voltage in common;
the first end of the sixth resistor is connected with the conductive rubber, a common junction point between the second end of the sixth resistor and the base electrode of the triode is connected with the first end of the seventh resistor, and the collector electrode of the triode is connected with a common junction point between the second end of the first resistor and the first end of the second resistor;
a common junction point between the second end of the second resistor and the grid electrode of the N-channel MOS transistor is connected with the first end of the third resistor, the drain electrode of the N-channel MOS transistor is connected with the first end of the fifth resistor, a common junction point between the second end of the fifth resistor and the grid electrode of the P-channel MOS transistor is connected with a common junction point between the second end of the first capacitor and the second end of the fourth resistor, and a common junction point between the drain electrode of the P-channel MOS transistor and the first end of the second capacitor is used as a power output end to be connected with the control board;
the positive electrode of the voltage stabilizing diode, the second end of the second capacitor, the second end of the seventh resistor, the emitting electrode of the triode, the second end of the third resistor and the source electrode of the N-channel MOS transistor are respectively grounded.
Optionally, the length of the conductive rubber is greater than or equal to the distance between the outer edges of the two front wheel hubs of the vehicle to be tested, the width of the conductive rubber is less than or equal to 2 centimeters, and the thickness of the conductive rubber is less than 5 millimeters.
Optionally, the control board includes a central processing unit and a communication module;
the central processing unit is respectively connected with the communication module and the detection module;
the communication module is connected with a control system of the vehicle to be tested;
the central processing unit is used for receiving the indication signal sent by the detection module, generating a control instruction according to the indication signal, and sending the control instruction to the control system of the vehicle to be tested through the communication module so that the vehicle to be tested is braked to stop.
Optionally, the communication module is a bluetooth communication module.
A braking distance testing method is applied to the braking control device, and comprises the following steps:
the vehicle rolling detection module to be detected generates an indication signal and sends the indication signal to the control panel;
the control board receives the indication signal and generates a control instruction according to the indication signal;
the control panel sends the control instruction to a vehicle to be tested, so that the vehicle to be tested is braked to stop;
and taking the distance between the middle point of the part of the front wheel of the vehicle to be tested, which is contacted with the ground after parking, and the detection module as the braking distance of the vehicle to be tested.
Optionally, after sending the control instruction to the vehicle to be tested, the testing method further includes:
and acquiring the indication signal generated by the detection module again within a preset time period, wherein the control panel does not respond to the indication signal.
Optionally, the control instruction is sent to the vehicle to be tested in a bluetooth communication mode.
A test system for a braking distance comprises the braking control device and a control system of a vehicle to be tested;
and the brake control device is in connection communication with a control system of the vehicle to be tested through Bluetooth.
The brake control device provided by the embodiment of the invention comprises a detection module and a control panel connected with the detection module; the detection module is used for generating an indication signal according to rolling of a vehicle to be detected and sending the indication signal to the control board; the control panel is connected with the control system of the vehicle to be tested and used for sending a control instruction to the control system of the vehicle to be tested after receiving the indication signal, so that the vehicle to be tested is braked to stop. Through detection module detects the vehicle that awaits measuring and produces the pilot signal, and pass through the control panel basis pilot signal makes the vehicle that awaits measuring carries out the brake operation to avoided because the deviation of hand eye reaction time, the control that leads to is advanced or the problem that control lags behind, guaranteed the detection and the brake control of vehicle to be measured between the uniformity, improved brake distance's detection precision, and reduced brake distance's detection cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic diagram of a braking distance detection system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a brake control apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a brake control apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a conductive rubber provided in an embodiment of the present invention;
FIG. 5 is a schematic diagram of a signal triggering circuit according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a brake control device according to another embodiment of the present invention;
fig. 7 is a flowchart of a method for detecting a braking distance according to an embodiment of 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 some, not all, embodiments of the present invention. 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.
In order to solve the problems of low precision and high cost in the detection of the braking distance of a vehicle in the prior art, the embodiment of the invention provides the braking control device, which is used for detecting an indicating signal generated by the vehicle to be detected and controlling the vehicle to be detected to perform braking operation according to the indicating signal so as to replace the prior art that a control rod or a remote controller is manually loosened, so that the problems of control advance or control delay caused by the deviation of hand-eye reaction time are solved, the detection precision of the braking distance is effectively improved, and the detection cost of the braking distance is reduced.
For convenience of understanding, the embodiment of the present invention first describes a braking distance detection system, and then describes the braking control device. Fig. 1 is a schematic composition diagram of a braking distance detection system according to an embodiment of the present invention. As shown in fig. 1, the braking distance detecting system includes: a brake control device 10, a control system 20 of a vehicle to be tested;
the brake control device 10 is connected and communicated with a control system 20 of the vehicle to be tested through Bluetooth.
Here, the control system 20 of the vehicle under test includes a remote controller receiver, and executes corresponding operations by receiving commands sent by a remote controller or a control lever. When the vehicle is braked, the remote controller is manually loosened or the control rod is restored to a preset position, so that the remote controller or the control rod sends a braking instruction to the vehicle to be tested, and the braking operation is realized.
The brake control device 10 provided by the embodiment of the invention is laid on a road surface, generates an indication signal when a vehicle to be tested passes through the detection, and sends a control instruction to the control system 20 of the vehicle to be tested according to the indication signal, so as to replace a remote controller or a control rod to send a brake instruction to the vehicle to be tested, so that the vehicle to be tested executes a brake operation according to the control instruction, and thus the brake control of the vehicle to be tested is realized. And after the vehicle to be tested is parked, the distance between the middle point of the part, contacting the ground, of the front wheel of the vehicle to be tested and the brake control device 10 is used as the brake distance of the vehicle to be tested.
Fig. 2 is a schematic structural diagram of a brake control device according to an embodiment of the present invention. As shown in fig. 2, the brake control apparatus 10 includes:
the detection module 11, the control panel 12 connected with said detection module 11;
the detection module 11 is used for detecting the rolling action of the vehicle to be detected, generating an indication signal and sending the indication signal to the control board 12; the control panel 12 is connected with the control system 20 of the vehicle to be tested, and is used for sending a control instruction to the control system 20 of the vehicle to be tested after receiving the indication signal, so that the vehicle to be tested brakes and stops.
Here, the detection module 11 is laid on the road surface. When the vehicle to be detected passes through the detection module 11, the detection module 11 generates an indication signal according to the rolling action of the vehicle to be detected, and sends the indication signal to the control panel 12. When receiving the indication signal, the control board 12 determines that the current vehicle to be tested passes through, generates a control instruction according to the indication signal, and sends the control instruction to the vehicle to be tested, so that the vehicle to be tested executes a braking operation according to the control instruction. After the vehicle to be tested is parked, the distance between the middle point of the part, contacting the ground, of the front wheel of the vehicle to be tested and the detection module 11 of the brake control device 10 is used as the brake distance of the vehicle to be tested.
Optionally, the embodiment of the invention adopts conductive rubber to detect the rolling action of the vehicle to be detected. Fig. 3 is a schematic structural diagram of a brake control device according to another embodiment of the present invention. As shown in fig. 3, in the brake control device, the detection module 11 includes:
the conductive rubber 111 is connected with the signal trigger circuit 112;
the signal trigger circuit 112 is connected with the control board 12;
when the vehicle to be tested rolls the conductive rubber 111, the conductive rubber 111 generates a first signal and sends the first signal to the signal trigger circuit 112, and the signal trigger circuit 112 generates an indication signal according to the first signal and sends the indication signal to the control panel 12.
Here, the conductive rubber 111 is laid on a road surface, and includes an upper layer and a lower layer, each layer is provided with a convex portion, the convex portion is conductive, and the convex portion of the upper layer conductive rubber is disposed opposite to the convex portion of the lower layer conductive rubber. For convenience of understanding, fig. 4 is a diagram illustrating a structure of the conductive rubber according to the embodiment of the present invention. When the vehicle to be detected is not rolled, the conductive rubber 111 outputs a second signal; when the vehicle to be tested runs at the rated speed and the front wheels crush the conductive rubber 111, the upper layer conductive rubber is in contact with the convex part of the lower layer conductive rubber for short circuit, so that a first signal is generated and sent to the signal trigger circuit 112, the signal trigger circuit 112 is triggered to generate an indication signal, and the indication signal is sent to the control board 12. At this time, after the vehicle to be tested stops, the distance between the midpoint of the part, contacting the ground, of the front wheel of the vehicle to be tested and the midpoint of the conductive rubber 111 is used as the braking distance of the vehicle to be tested. Alternatively, the first signal may be a low level, and the second signal may be a high level.
Optionally, the length of the conductive rubber 111 is preferably greater than or equal to the distance between the outer edges of the hubs of the two front wheels of the vehicle to be tested, so that the two front wheels synchronously roll the conductive rubber 111 when the vehicle to be tested passes through, and a specific application scenario can be adjusted according to a vehicle type and the distance between the two front wheels. The width of the conductive rubber 111 is preferably less than or equal to 2 cm, so as to improve the detection precision of the vehicle to be detected. The thickness of the conductive rubber 111 is preferably less than 5 mm, so as to reduce the influence of the deformation of the conductive rubber on the running speed of the vehicle to be tested. Experiments prove that the influence on the running speed of the vehicle to be tested can be ignored due to the fact that the thickness of the conductive rubber 111 is thin, the first signal is triggered to be calculated after the center position of the conductive rubber 111 is pressed down, and the maximum deviation of the vehicle to be tested on the braking distance is smaller than 1 cm due to the triggering position.
Fig. 5 is a schematic diagram of a signal trigger circuit according to an embodiment of the present invention. As shown in fig. 5, the signal trigger circuit 112 includes:
the circuit comprises a voltage stabilizing diode ZD, a first resistor R1, a second resistor R2, a third resistor R3, an N-channel MOS transistor T1, a first capacitor C1, a fourth resistor R4, a fifth resistor R5, a P-channel MOS transistor T2, a second capacitor C2, a sixth resistor R6, a seventh resistor R7 and a triode VT.
The cathode of the zener diode ZD, the first end of the first resistor R1, the first end of the first capacitor C1, the first end of the fourth resistor R4, and the source of the P-channel MOS transistor T2 are commonly connected to the input voltage Ui.
The first end of the sixth resistor R6 is connected with conductive rubber, the common junction point between the second end of the sixth resistor R6 and the base electrode of the triode VT is connected with the first end of the seventh resistor R7, and the collector electrode of the triode VT is connected with the common junction point between the second end of the first resistor R1 and the first end of the second resistor R2.
The common junction point between the second end of the second resistor R2 and the gate of the N-channel MOS transistor T1 is connected with the first end of the third resistor R3, the drain of the N-channel MOS transistor T1 is connected with the first end of the fifth resistor R5, the second end of the fifth resistor R5 is connected with the common junction point between the gates of the P-channel MOS transistor T2 and the common junction point between the second end of the first capacitor C1 and the second end of the fourth resistor R4, and the common junction point between the drain of the P-channel MOS transistor T2 and the first end of the second capacitor C2 is used as a power output end and is connected with the control board.
The anode of the zener diode ZD, the second end of the second capacitor C2, the second end of the seventh resistor R7, the emitter of the triode VT, the second end of the third resistor R3, and the source of the N-channel MOS transistor T1 are respectively grounded.
Here, when the vehicle to be tested is not rolled, the conductive rubber 111 outputs a high level, the transistor VT is turned on, so that the N-channel MOS transistor T1 and the P-channel MOS transistor T2 are turned off, the drain of the P-channel MOS transistor T2 is at a low level, and the control board 12 is not triggered. When a vehicle to be tested rolls, the conductive rubber is conducted to output a low level, the triode VT is turned off, the input voltage Ui is divided by the first resistor R1, the second resistor R2 and the third resistor R3, so that the N-channel MOS transistor T1 is conducted, then the P-channel MOS transistor T2 is conducted, and the conducted drain electrode of the P-channel MOS transistor T2 outputs a high level which is sent to the control panel 12 as an indication signal.
In the embodiment of the present invention, the signal trigger circuit 112 converts the low level output by the conductive rubber into the high level, and sends the high level as the indication signal to the control board 12, which is beneficial to filtering noise and improving the accuracy of the indication signal compared with directly sending the low level generated when the conductive rubber is rolled as the indication signal to the control board 12.
Optionally, fig. 6 is a schematic structural diagram of a brake control device according to another embodiment of the present invention. As shown in fig. 6, in the brake control device, the control plate 12 includes:
a central processor 121, a communication module 122;
the central processor 121 is connected to the communication module 122 and the detection module 11 respectively;
the communication module 122 is connected with the control system 20 of the vehicle to be tested;
the central processing unit 121 is configured to receive the indication signal sent by the detection module 11, generate a control instruction according to the indication signal, and send the control instruction to the control system 20 of the vehicle to be tested through the communication module 122, so that the vehicle to be tested is braked to stop.
In the embodiment of the present invention, the signal trigger circuit 112 converts the first signal output by the conductive rubber into a second signal, and sends the second signal as an indication signal to the control board 12; the central processing unit 121 analyzes the indication signal, then generates a control instruction, and sends the control instruction to the control system 20 of the vehicle to be tested through the communication module 122, which is equivalent to forcibly restoring the remote controller or the control lever to a preset 0 point position, so that the vehicle to be tested naturally brakes to stop under the action of friction force.
Optionally, the central processing unit 121 is further configured to acquire the indication signal generated by the detection module 11 again within a preset time period, and not respond to the indication signal.
After the front wheel rolls the conductive rubber, the conductive rubber bounces, the rear wheel of the vehicle to be detected passes through the conductive rubber and can trigger the detection module 11 to generate an indication signal, and in order to avoid sending out a control instruction again, the embodiment of the invention enables the central processing unit 121 not to respond to the indication signal generated by rolling the rear wheel through software compatibility design.
Optionally, the communication module is preferably a bluetooth communication module. The central processing unit 121 sends the control instruction to the control system 20 of the vehicle to be tested in a bluetooth communication manner.
According to the embodiment of the invention, the vehicle to be tested is detected through the deformation of the conductive rubber, and the control instruction is transmitted in a Bluetooth communication mode, as mentioned above, the maximum deviation of the vehicle to be tested on the displacement is smaller than 1 cm due to the triggering position of the conductive rubber 111, the Bluetooth communication transmission delay is 5 milliseconds, and the delay distance is 0.5 cm at a rated speed of 1 m/s, so that the maximum deviation between the braking distance and the actual value obtained through the braking control realized through the braking control device provided by the embodiment of the invention is not more than 1.5 cm.
In summary, the brake control device provided in the embodiment of the present invention includes a detection module and a control board, wherein the detection module generates an indication signal according to rolling of a vehicle to be detected, and sends the indication signal to the control board, and the control board sends a control instruction to a control system of the vehicle to be detected according to the received indication signal, so that the vehicle to be detected is braked to stop, thereby avoiding a problem of control advance or control delay caused by deviation of hand-eye reaction time, ensuring consistency between detection and brake control of the vehicle to be detected, improving detection accuracy of a brake distance, and reducing cost of brake distance detection.
It should be noted that all or part of each module in the brake control device may be implemented by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
Optionally, fig. 7 is a flowchart of an implementation of the method for detecting a braking distance according to the embodiment of the present invention. In the embodiment of the present invention, the method for detecting the braking distance is applied to the braking control device shown in fig. 2 to 6. Optionally, the detection method includes:
in step S701, a vehicle to be detected rolls the detection module, and the detection module generates an indication signal and sends the indication signal to the control board.
In step S702, the control board receives the indication signal and generates a control command according to the indication signal.
In step S703, the control board sends the control instruction to a vehicle to be tested, so that the vehicle to be tested is braked to stop.
And taking the distance between the middle point of the part of the front wheel of the vehicle to be tested, which is contacted with the ground after parking, and the detection module as the braking distance of the vehicle to be tested.
Optionally, the detection module includes conductive rubber, and the embodiment of the present invention detects the rolling action of the vehicle to be detected by a low level generated when the conductive rubber is rolled, and generates an indication signal. And then generating a control instruction according to the indication signal, and sending the control instruction to the vehicle to be tested so as to restore the remote controller or the control rod of the vehicle to be tested to a preset position, so that the vehicle to be tested is braked to stop. Optionally, the control instruction is sent to the vehicle to be tested in a bluetooth communication mode. In the embodiment of the invention, the distance between the middle point of the part of the front wheel of the vehicle to be tested, which is contacted with the ground after parking, and the middle point of the conductive rubber of the detection module is used as the braking distance of the vehicle to be tested.
Optionally, after sending the control instruction to the vehicle to be tested, the detection method further includes:
and acquiring the indication signal generated by the detection module again within a preset time period, wherein the control panel does not respond to the indication signal.
Here, after the front wheel of the vehicle to be tested presses the conductive rubber, the conductive rubber bounces, and the rear wheel of the vehicle to be tested passes through the conductive rubber, so that the detection module is triggered to generate the indication signal again. In order to avoid sending out the control command again, the embodiment of the invention adopts a software compatible design, and after the control command is sent to the vehicle to be detected, if the indication signal generated by the detection module is obtained again in a preset time period, the indication signal is not responded.
Optionally, as a preferred example of the present invention, the length of the conductive rubber is preferably greater than or equal to the distance between the outer edges of the hubs of the two front wheels of the vehicle to be tested, so that the two front wheels synchronously roll the conductive rubber 111 when the vehicle to be tested passes through, and a specific application scenario may be adjusted according to a vehicle type and the distance between the two front wheels. The width of the conductive rubber is preferably less than or equal to 2 cm, so that the detection precision of the vehicle to be detected is improved. The thickness of the conductive rubber is preferably less than 5 mm, so that the influence of the deformation of the conductive rubber on the running speed of the vehicle to be tested is reduced.
Through experiments, if the thickness of the conductive rubber is less than 5 mm and the width of the conductive rubber is about 2 cm, the influence of the thickness of the rubber with points on the running speed of the vehicle to be tested can be ignored, low level calculation is triggered after the center position of the conductive rubber is pressed down, and the maximum deviation of the vehicle to be tested on the displacement is less than 1 cm due to the triggering position. And if the Bluetooth communication transmission delay is 5 milliseconds, the delay distance of the vehicle to be tested is 0.5 centimeter at the rated speed of 1 m/s. Brake control is realized based on the brake control device, the maximum deviation between the detected brake distance and the actual value is not more than 1.5(1+0.5) cm, and the accuracy of brake distance detection is greatly improved.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, databases, or other media used in embodiments provided herein may include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (8)
1. A brake control apparatus, comprising:
the detection module is connected with the control panel;
the detection module is used for detecting the rolling action of a vehicle to be detected, generating an indication signal and sending the indication signal to the control panel; the control panel is connected with a control system of the vehicle to be tested and used for sending a control instruction to the control system of the vehicle to be tested after receiving the indication signal so as to brake the vehicle to be tested to stop;
the detection module comprises:
conductive rubber and a signal trigger circuit;
the conductive rubber is connected with the signal trigger circuit;
the signal trigger circuit is connected with the control board;
when a vehicle to be tested rolls the conductive rubber, the conductive rubber generates a first signal and sends the first signal to the signal trigger circuit, and the signal trigger circuit generates an indication signal according to the first signal and sends the indication signal to the control board;
the signal trigger circuit includes:
the circuit comprises a voltage stabilizing diode, a first resistor, a second resistor, a third resistor, an N-channel MOS transistor, a first capacitor, a fourth resistor, a fifth resistor, a P-channel MOS transistor, a second capacitor, a sixth resistor, a seventh resistor and a triode;
the negative electrode of the voltage stabilizing diode, the first end of the first resistor, the first end of the first capacitor, the first end of the fourth resistor and the source electrode of the P-channel MOS transistor are connected to an input voltage in common;
the first end of the sixth resistor is connected with the conductive rubber, a common junction point between the second end of the sixth resistor and the base electrode of the triode is connected with the first end of the seventh resistor, and the collector electrode of the triode is connected with a common junction point between the second end of the first resistor and the first end of the second resistor;
a common junction point between the second end of the second resistor and the grid electrode of the N-channel MOS transistor is connected with the first end of the third resistor, the drain electrode of the N-channel MOS transistor is connected with the first end of the fifth resistor, a common junction point between the second end of the fifth resistor and the grid electrode of the P-channel MOS transistor is connected with a common junction point between the second end of the first capacitor and the second end of the fourth resistor, and a common junction point between the drain electrode of the P-channel MOS transistor and the first end of the second capacitor is used as a power output end to be connected with the control board;
the positive electrode of the voltage stabilizing diode, the second end of the second capacitor, the second end of the seventh resistor, the emitting electrode of the triode, the second end of the third resistor and the source electrode of the N-channel MOS transistor are respectively grounded.
2. The brake control device according to claim 1, wherein the conductive rubber has a length greater than or equal to a distance between outer edges of two front wheel hubs of the vehicle to be tested, a width less than or equal to 2 cm, and a thickness less than 5 mm.
3. The brake control device according to claim 1, wherein the control board includes a central processor, a communication module;
the central processing unit is respectively connected with the communication module and the detection module;
the communication module is connected with a control system of the vehicle to be tested;
the central processing unit is used for receiving the indication signal sent by the detection module, generating a control instruction according to the indication signal, and sending the control instruction to the control system of the vehicle to be tested through the communication module so that the vehicle to be tested is braked to stop.
4. The brake control device of claim 3, wherein the communication module is a Bluetooth communication module.
5. A braking distance testing method applied to the brake control apparatus according to any one of claims 1 to 4, the testing method comprising:
the vehicle rolling detection module to be detected generates an indication signal and sends the indication signal to the control panel;
the control board receives the indication signal and generates a control instruction according to the indication signal;
the control panel sends the control instruction to a vehicle to be tested, so that the vehicle to be tested is braked to stop;
and taking the distance between the middle point of the part of the front wheel of the vehicle to be tested, which is contacted with the ground after parking, and the detection module as the braking distance of the vehicle to be tested.
6. The method for testing a braking distance according to claim 5, wherein after the control command is transmitted to the vehicle under test, the method further comprises:
and acquiring the indication signal generated by the detection module again within a preset time period, wherein the control panel does not respond to the indication signal.
7. The method for testing the braking distance according to claim 6, wherein the control command is sent to the vehicle to be tested in a Bluetooth communication mode.
8. A braking distance testing system, characterized in that the testing system comprises a control system of a vehicle to be tested, a braking control device according to any one of claims 1 to 4;
and the brake control device is in connection communication with a control system of the vehicle to be tested through Bluetooth.
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| CN114593922A (en) * | 2022-03-16 | 2022-06-07 | 广州朗晴电动车有限公司 | Brake system detection device and system for electric vehicle production |
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| US6132016A (en) * | 1997-05-02 | 2000-10-17 | Hydro-Aire, Inc. | System and method for adaptive brake application and initial skid detection |
| CN2599560Y (en) * | 2003-01-30 | 2004-01-14 | 聂建伟 | Motor-driven braking property detector |
| CN201225937Y (en) * | 2007-10-31 | 2009-04-22 | 重庆车辆检测研究院有限公司 | Test instrument for automobile anti-locking brake system performance based on GPS |
| CN202853589U (en) * | 2012-08-28 | 2013-04-03 | 林德（中国）叉车有限公司 | Vehicle braking distance testing arrangement |
| CN203798577U (en) * | 2014-03-28 | 2014-08-27 | 广州华工机动车检测技术有限公司 | Braking distance calibration device of portable automobile braking performance tester |
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