CN110988384A

CN110988384A - Wireless transmission type motor vehicle speed measuring system and method utilizing pressing belt

Info

Publication number: CN110988384A
Application number: CN201911164698.XA
Authority: CN
Inventors: 赵清泉; 杨栋; 王亚辉; 赵�卓; 方华; 马寅骞; 李皓
Original assignee: China Certification Western Detection Co ltd
Current assignee: China Certification Western Detection Co ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-04-10

Abstract

The invention discloses a wireless transmission type motor vehicle speed measuring system and a speed measuring method by utilizing a press belt, the system comprises a plurality of sub-equipment modules and a main equipment module which is wirelessly connected with the plurality of sub-equipment modules, a press belt mechanism comprises a first press belt and a second press belt, the sub-equipment modules comprise sub-shells, sub-controllers and sub wireless communication modules, the input end of each sub-controller is connected with a first signal acquisition module and a second signal acquisition module, and the main equipment module comprises a main shell, a main controller and a main wireless communication module. The method comprises the following steps: firstly, arranging a belt pressing mechanism; secondly, data acquisition and data processing; and thirdly, data judgment, alarm and prompt. The invention realizes the speed measurement of the motor vehicle, can accurately measure the instantaneous speed at a measuring point and adopts a wireless transmission mode to transmit data, and the test system is convenient to build, convenient and fast to operate and accurate in test data acquisition.

Description

Wireless transmission type motor vehicle speed measuring system and method utilizing pressing belt

Technical Field

The invention belongs to the technical field of motor vehicle speed measurement, and particularly relates to a wireless transmission type motor vehicle speed measurement system and a speed measurement method by using a pressing belt.

Background

As a vehicle, the motor vehicle is frequently used in life, and a detection organization is required by the country to detect noise of the motor vehicle, and in the detection process of these items, the speed of the motor vehicle passing a specific point needs to be tested. Such as motorcycle noise detection, the instantaneous vehicle speed specified to pass the test road entry point must be within 3% of the specified vehicle speed. However, the current widely used speed measuring device, such as a GPS speed meter, cannot accurately record the instantaneous speed of the motorcycle passing through a specified point, and can only rely on the driver to visually measure and record, so that the accuracy of data is questioned and potential safety hazards exist.

In addition, the existing speed measuring system is mostly in wired connection with a plurality of sub-equipment modules and a main equipment module, and the field arrangement time and difficulty before testing are increased. Therefore, a wireless transmission type motor vehicle speed measuring system and a speed measuring method which are simple in structure and reasonable in design and utilize the press belts are absent at present, the instantaneous speed of the motor vehicle when the motor vehicle passes through the two press belts is calculated according to the time difference of signals generated between every two press belts and the distance between the press belts, so that the speed measurement of the motor vehicle is realized, the host machine is in wireless data communication with the plurality of sub-devices, the speed measurement of the plurality of motor vehicles is facilitated, the operation is convenient, and the experimental data acquisition is accurate.

Disclosure of Invention

The invention aims to solve the technical problem that the prior art is not enough, and provides a wireless transmission type motor vehicle speed measurement system utilizing press belts, which has the advantages of simple structure, reasonable design and low cost, wherein the sub-controller calculates the instantaneous speed of a motor vehicle passing through two press belts according to the time difference of signals generated between each press belt and the distance between the press belts, and then sends the instantaneous speed of the motor vehicle passing through a test point to the main controller, so that the test accuracy is improved, and the main equipment module is in wireless data communication with the sub-equipment modules.

In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides an utilize wireless transmission formula motor vehicle speed measurement system of pressing area which characterized in that: comprises a plurality of sub-equipment modules for testing the instantaneous speed of a plurality of motor vehicles when the motor vehicles pass through and a main equipment module which is in wireless connection with the sub-equipment modules, a plurality of belt pressing mechanisms are respectively arranged on a test road, the belt pressing mechanism comprises a first belt pressing and a second belt pressing which are arranged at intervals along a test road, the sub-equipment module comprises a sub-shell and a first electronic circuit board arranged in the sub-shell, and a sub-controller integrated on the first electronic circuit board and a sub-wireless communication module connected with the sub-controller, the input end of the sub-controller is connected with a first signal acquisition module connected with the first press belt and a second signal acquisition module connected with the second press belt, the first signal acquisition module generates a high level signal to the sub-controller when the motor vehicle does not roll the first press belt, and the second signal acquisition module generates a high level signal to the sub-controller when the motor vehicle does not roll the second press belt; the first signal acquisition module generates a low-level signal to the sub-controller when a front wheel of the motor vehicle rolls the first press belt, and the sub-controller starts timing to obtain an initial moment; the second signal acquisition module generates a low-level signal to the sub-controller when the front wheel of the motor vehicle rolls the second press belt, and the sub-controller finishes timing to obtain an end moment;

the main equipment module comprises a main shell, a second electronic circuit board arranged in the main shell, a main controller integrated on the second electronic circuit board and a main wireless communication module connected with the main controller, and the plurality of sub wireless communication modules are in data wireless communication with the main wireless communication module.

The wireless transmission type motor vehicle speed measuring system utilizing the press belt is characterized in that: the sub-shell is provided with a sub-key module, a sub-display screen, a first sub-indicator light, a second sub-indicator light and a third sub-indicator light, the sub-equipment module further comprises a sub-USB (universal serial bus) conversion serial port circuit and a clock module which are connected with the sub-controller, the output end of the sub-key module is connected with the input end of the sub-controller, the sub-display screen is controlled by the sub-controller, the output end of the sub-controller is connected with a sub-acousto-optic indicator circuit, and the first sub-indicator light, the second sub-indicator light and the third sub-indicator light are all controlled by the sub-acousto-optic;

the main casing body is last to be provided with main display screen, first main pilot lamp, second main pilot lamp and test environment pilot lamp, main equipment module still includes the main USB who meets with main control unit changes serial circuits, main memory and USB memory cell circuit, main control unit's output termination has main reputation indicating circuit, the main display screen is controlled by main control unit, first main pilot lamp and second main pilot lamp are controlled by main reputation indicating circuit.

The wireless transmission type motor vehicle speed measuring system utilizing the press belt is characterized in that: the sub-equipment module further comprises a sub-power supply module, the main equipment module further comprises a main power supply module, the sub-power supply module and the main power supply module are identical in structure, and the sub-power supply module and the main power supply module respectively comprise a chip LM2596-5 and a chip LM 2596-3.3.

The wireless transmission type motor vehicle speed measuring system utilizing the press belt is characterized in that: the sub acousto-optic indicating circuit comprises a chip U14 with the model number of ULN2003A, pins 1 to 3 of the chip U14 are respectively connected with a sub controller, the 7 th pin of the chip U14 is connected with a sub-controller, the 9 th pin of the chip U14 is connected with a 5V power output end and is grounded through a capacitor C23, the 10 th pin of the chip U14 is connected with one end of a buzzer LS1, the other end of the buzzer LS1 is connected with a 5V power supply output end, the 16 th pin of the chip U14 is connected with the cathode of the LED D3 through the resistor R39, the anode of the LED D3 is connected with the 5V power output end, the 15 th pin of the chip U14 is connected with the cathode of the LED D4 through a resistor R40, the anode of the light-emitting diode D4 is connected with the 5V power output end, the 14 th pin of the chip U14 is connected with the cathode of the light-emitting diode D5 through a resistor R41, and the anode of the light-emitting diode D5 is connected with the 5V power output end.

The wireless transmission type motor vehicle speed measuring system utilizing the press belt is characterized in that: the main acousto-optic indicating circuit comprises a chip U8 with the model number of ULN2003A, wherein a pin 1 to a pin 6 of the chip U8 are respectively connected with a main controller, a pin 7 of the chip U8 is connected with the main controller, a pin 9 of the chip U8 is connected with a 5V power supply output end and is grounded through a capacitor C24, a pin 10 of the chip U8 is connected with one end of a buzzer LS2, the other end of the buzzer LS2 is connected with a 5V power supply output end, a pin 16 of the chip U8 is connected with a cathode of a light emitting diode D14 through a resistor R19, an anode of the light emitting diode D14 is connected with the 5V power supply output end, a pin 15 of the chip U8 is connected with a cathode of the light emitting diode D15 through a resistor R53, an anode of the light emitting diode D15 is connected with the 5V power supply output end, a pin 14 of the chip U8 is connected with a cathode of the light emitting diode D16 through a resistor R54, and an anode of the light emitting diode D16 is connected, the 13 th pin of the chip U8 is connected with the cathode of the LED D17 through the resistor R22, the anode of the LED D17 is connected with the 5V power output end, the 12 th pin of the chip U8 is connected with the cathode of the LED D19 through the resistor R70, the anode of the LED D19 is connected with the 5V power output end, the 11 th pin of the chip U8 is connected with the cathode of the LED D20 through the resistor R71, and the anode of the LED D20 is connected with the 5V power output end.

The wireless transmission type motor vehicle speed measuring system utilizing the press belt is characterized in that: the first signal acquisition module comprises a chip U2 with the model of PC817, one end of a first push belt is a contact of a switch S1, the other end of the first push belt is another contact of a switch S1, the anode of the chip U2 is connected with the 5V power output end through a resistor R32, the cathode of the chip U2 is connected with another contact of a switch S1, the collector of the chip U2 is divided into two paths, one path is connected with the 3.3V power output end through the resistor R1, and the other path is the output end of the first signal acquisition module; the emitter of the chip U2 and one contact of the switch S1 are grounded;

the second signal acquisition module comprises a chip U4 with the model of PC817, one end of a second push belt is a contact of a switch S2, the other end of the second push belt is another contact of a switch S2, the anode of the chip U4 is connected with the 5V power output end through a resistor R4, the cathode of the chip U4 is connected with the other contact of a switch S2, the collector of the chip U4 is divided into two paths, one path is connected with the 3.3V power output end through the resistor R3, and the other path is the output end of the second signal acquisition module; the emitter of the chip U4 and one contact of the switch S2 are grounded.

Meanwhile, the invention also discloses a wireless transmission type motor vehicle speed measuring method using the press belt, which has the advantages of simple method steps, reasonable design, convenient realization, high detection accuracy and good use effect, and is characterized by comprising the following steps:

step one, arranging a belt pressing mechanism:

101, respectively arranging a plurality of belt pressing mechanisms at a plurality of test points along an ith test road; each belt pressing mechanism comprises a first belt pressing and a second belt pressing which are arranged at intervals along the test road, and the distance between the first belt pressing and the second belt pressing on the ith test road is S_iI is a positive integer, S_iThe value range of (A) is 0.5 m-1 m;

102, laying a sub-equipment module at one side of an ith test road, and recording the sub-equipment module as an ith sub-equipment module;

103, inputting the distance S between the adjacent first pressing belt and the second pressing belt on the ith test road through the sub-key module of the ith sub-equipment module_iA sub-controller to the ith sub-device module;

step two, data acquisition and data processing:

step 201, the motor vehicle moves along the ith test road, when the front wheel of the motor vehicle rolls the first press belt on the ith test road, the first press belt is switched on, the first press belt outputs a low level signal to the first signal acquisition module, the first signal acquisition module outputs a low level signal to the sub-controller, the sub-controller controls the third sub-indicator light to flicker through the sub-acousto-optic indicator circuit, and the sub-controller obtains the starting time through the clock module and records the starting time as t_i0The sub-controller will obtain the starting time t_i0Through sub wirelessThe communication module emits the signal, the sub-controllers control the second sub-indicator light to be on through the sub-acousto-optic indicator circuit, and the main controller obtains the initial time t through the main wireless communication module_i0The main controller controls the second main indicating lamp to be on through the main acousto-optic indicating circuit, and the main controller also displays the initial moment t through the main display screen_i0；

Step 202, after a rear wheel of the motor vehicle rolls over a first press belt on an i test road, the first press belt is disconnected, a first signal acquisition module outputs a high-level signal to a sub-controller, and the sub-controller controls a third sub-indicator lamp to not flicker through a sub-acousto-optic indicating circuit;

step 203, when the front wheel of the motor vehicle rolls the second press belt on the ith test road, the second press belt is switched on, the second press belt outputs a low level signal to the second signal acquisition module, the second signal acquisition module outputs a low level signal to the sub-controller, the sub-controller controls the third sub-indicator light, namely the light emitting diode D5, to flash again through the sub-acousto-optic indicator circuit, and the sub-controller obtains the end time through the clock module and records the end time as t_i1The sub-controller will obtain the end time t_i1The light emitting diode D4 is emitted through the sub-wireless communication module, the sub-controller controls the second sub-indicator light through the sub-acousto-optic indicating circuit, and the main controller obtains the end time t through the main wireless communication module_i1The main controller controls the second main indicating lamp to be on through the main acousto-optic indicating circuit, and the main controller also displays the ending time t through the main display screen_i1；

Step 204, after the rear wheel of the motor vehicle rolls over a second press belt on the ith test road, the second press belt is disconnected, a second signal acquisition module outputs a high-level signal to a sub-controller, and the sub-controller controls a third sub-indicator light to not flicker through a sub-acousto-optic indicating circuit;

step 205, the sub-controller according to the formula t_i＝t_i1-t_i0Obtaining the running time t of the motor vehicle on the ith test road passing through the test point_i(ii) a Meanwhile, the sub-controller obtains the driving time t of the motor vehicle on the ith test road_iIs transmitted out through the sub-wireless communication module, and the sub-controller passes throughThe sub acousto-optic indicating circuit controls the second sub indicating lamp to be on, and the main controller obtains the motor vehicle running time t on the ith test road through the main wireless communication module_iThe main controller controls the second main indicating lamp to be on through the main acousto-optic indicating circuit, and the main controller also displays the running time t of the motor vehicle on the ith test road through the main display screen_i；

Step 206, the sub-controller according to the formula

Obtaining the instantaneous speed V of the motor vehicle on the ith test road passing through the test point_i；

Step three, data judgment alarm reminding:

301, the sub-controller obtains the instantaneous speed V of the motor vehicle passing the test point on the ith test road_iThe sub-wireless communication module emits the signal, and the sub-controller controls the second sub-indicator light to be on through the sub-acousto-optic indicator circuit;

step 302, the main controller obtains the instantaneous speed V of the motor vehicle passing the test point on the ith test road through the main wireless communication module_iMeanwhile, the main controller controls the second main indicator light to be on through the main acousto-optic indicating circuit;

step 303, the main controller obtains the instantaneous speed V of the motor vehicle on the ith test road passing through the test point_iAnd a speed threshold V_sComparing, and when the motor vehicle on the ith test road passes through the instantaneous speed V of the test point_iNot meeting the speed threshold V_sWhen the alarm is given, the main controller controls the buzzer LS2 to give an alarm through the main acousto-optic indicating circuit, and the main controller displays NG reminding through the main display screen;

when the motor vehicle on the ith test road passes through the instantaneous speed V of the test point_iMeet speed threshold V_sAnd the main controller displays the OK reminding through the main display screen.

The above method is characterized in that: and (3) between the layout of the belt pressing mechanism in the step one and the data acquisition and data processing in the step two, the system test is required, and the specific process is as follows:

step A, confirming that the sub power supply module supplies power to the sub controller normally, and controlling a first sub indicator lamp to be on by the sub controller through a sub acousto-optic indicating circuit;

b, confirming that the first pressure belt is normally connected with the sub-controller through the first signal acquisition module, and confirming that the second pressure belt is normally connected with the sub-controller through the second signal acquisition module;

step C, confirming that the sub key module, the clock module, the sub wireless communication module, the sub acousto-optic indicating circuit and the sub display screen are normally connected with the sub controller;

d, confirming that the main power supply module supplies power to the main controller normally, and controlling a first main indicator lamp to be turned on by the main controller through a main acousto-optic indicating circuit;

e, confirming that the main memory, the main wireless communication module, the main acousto-optic indicating circuit and the main display screen are normally connected with the main controller;

and F, confirming that the communication between the sub wireless communication module and the main wireless communication module is normal, and finishing the initial check of each module.

The above method is characterized in that: according to the method from the first step to the third step, the returning instantaneous speed V of the motor vehicle on the ith test road is obtained in the process that the motor vehicle returns to pass through the second pressing belt and the first pressing belt in sequence_i′；

According to the formula

Obtaining the deviation value e of the back-and-forth speed of the motor vehicle on the ith test road, and comparing the deviation value e of the back-and-forth speed of the motor vehicle on the ith test road with the deviation set value e of the back-and-forth speed of the motor vehicle_sComparing, when e is less than or equal to e_sTime, the instantaneous speed V of the vehicle returning on the ith test road is described_i' and the instantaneous speed V of the vehicle on the ith test road passing through the test point_iEffective according to the formula

Obtaining the ith test roadCorrected instantaneous speed of motor vehicle

When e is>e_sTime, the instantaneous speed V of the vehicle returning on the ith test road is described_i' and the instantaneous speed V of the vehicle on the ith test road passing through the test point_iAnd if the vehicle is invalid, re-detecting the vehicle according to the method from the first step to the third step.

The above method is characterized in that: deviation set value e of motor vehicle back-and-forth speed_sIs not more than 3%.

Compared with the prior art, the invention has the following advantages:

1. simple structure, reasonable in design and simple and convenient, the input cost is lower in the installation.

2. The invention detects the signal of the first press belt through the first signal acquisition module, detects the signal of the second press belt through the second signal acquisition module, and sends the detected first press belt signal and the second press belt signal to the sub-controller, obtains the time difference of rolling two press belts by the front wheel of the motor vehicle and the distance between the two press belts, and calculates the instantaneous speed of the motor vehicle when the motor vehicle passes through the press belts, so as to realize the measurement of the instantaneous speed of the motor vehicle passing through the test point.

3. According to the invention, the first press belt and the second press belt are arranged, because the high level signal is generated to the sub-controller when the front wheel of the motor vehicle does not roll the first press belt and the second press belt, the low level signal is generated to the sub-controller when the front wheel of the motor vehicle rolls the first press belt and the second press belt, and according to the change of the level signal, the sub-controller obtains the time difference of rolling the two press belts by the front wheel of the motor vehicle, so that the accuracy of obtaining the time difference is improved, and the accuracy of testing the speed of the motor vehicle is further improved.

4. The main equipment module and the plurality of sub-equipment modules are in wireless data communication, so that the plurality of sub-equipment modules are conveniently in wireless connection with the main equipment module, and the field arrangement time and difficulty before testing are reduced; in addition, the sub-controller calculates the instantaneous speed of the motor vehicle passing through the two press belts, and then sends the instantaneous speed of the motor vehicle passing through the test point to the main controller, so that data errors caused by interference and other conditions are avoided, signal loss or errors caused by transmission cable faults or signal interference are avoided, and the accuracy of obtaining test data is improved; secondly, be convenient for to the control of a plurality of sub-equipment modules, be convenient for centralized management, be convenient for the speed measuring of a plurality of motor vehicles, the simple operation.

5. The wireless transmission type motor vehicle speed measuring method using the belt pressing is simple and convenient to operate and good in using effect, firstly, the belt pressing mechanism is arranged, secondly, data acquisition and data processing are carried out, and the instantaneous speed V of a motor vehicle passing through a test point on the ith test road is obtained through the sub-equipment module_iThen, the sub-equipment module obtains the instantaneous speed V of the motor vehicle passing the test point on the ith test road_iThe automobile speed measuring system is characterized in that the sub wireless communication module and the main wireless communication module are used for sending the speed measuring system to the main equipment module, so that the equipment module can be judged and monitored conveniently, centralized management is facilitated, speed measurement of a plurality of automobiles is achieved, and operation is convenient and fast.

6. According to the invention, the two press belts are arranged on the test road, and the distance between the two press belts is smaller, so that the instantaneous speed of the motor vehicle passing through the two press belts can be conveniently obtained, and the instantaneous speed of the motor vehicle passing through each test point of the test road can be conveniently realized.

In conclusion, the invention has reasonable design and low cost, the sub-controller calculates the instantaneous speed of the motor vehicle passing through the two press belts according to the time difference of the signals generated between the press belts and the distance between the press belts, and then the instantaneous speed of the motor vehicle passing through the test point is sent to the main controller, thereby avoiding data errors caused by interference and the like, improving the test accuracy, and the main equipment module is in wireless data communication with the plurality of sub-equipment modules, so that the test system is convenient to build, convenient to test the speed of the plurality of motor vehicles, convenient to operate, accurate in test data acquisition and strong in practicability.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

Fig. 1 is a schematic structural diagram of a wireless transmission type motor vehicle speed measuring system using a press belt according to the present invention.

FIG. 2 is a schematic block circuit diagram of a sub-device module of the present invention.

FIG. 3 is a schematic block circuit diagram of the master device module of the present invention.

Fig. 4 is a schematic circuit diagram of the sub power supply module and the main power supply module of the present invention.

FIG. 5 is a schematic circuit diagram of the sub acousto-optic indicating circuit of the present invention.

FIG. 6 is a schematic circuit diagram of the main acousto-optic indicating circuit of the present invention.

FIG. 7 is a schematic circuit diagram of a USB to serial circuit according to the present invention.

FIG. 8 is a schematic circuit diagram of a host USB to serial circuit according to the present invention.

Fig. 9 is a schematic circuit diagram of a first signal acquisition module according to the present invention.

Fig. 10 is a schematic circuit diagram of a second signal acquisition module according to the present invention.

Fig. 11 is a schematic circuit diagram of the sub-wireless communication module of the present invention.

Fig. 12 is a circuit schematic of the primary wireless communication module of the present invention.

FIG. 13 is a schematic circuit diagram of the main memory of the present invention.

FIG. 14 is a schematic circuit diagram of a USB memory cell circuit according to the present invention.

FIG. 15 is a circuit schematic of the clock circuit of the present invention.

FIG. 16 is a schematic circuit diagram of the sub-key module of the present invention.

Fig. 17 is a schematic structural diagram of a sub-device module according to the present invention.

Fig. 18 is a schematic structural diagram of a master device module according to the present invention.

Fig. 19 is a flow chart of the wireless transmission type motor vehicle speed measuring method using the press belt according to the present invention.

Description of reference numerals:

1-a sub-device module; 1-subshell; 10-a clock module;

11-subcontroller; 12-a sub-power supply module;

13-a first signal acquisition module; 14-a second signal acquisition module; 15-sub key module;

16-a sub wireless communication module; 17-sub acousto-optic indicating circuit; 17-1 — a first sub-indicator light;

17-2 — a second sub-indicator light; 17-3-a third sub-indicator light; 18-sub display screen;

19-sub USB to serial port circuit; 2-a master device module; 2-1-main housing;

21 — a master controller; 22-a main power supply module; 23-main memory;

24-USB memory cell circuit; 26-a primary wireless communication module; 27-a main acousto-optic indication circuit;

27-1 — a first main indicator light; 27-2 — a second main indicator light; 27-3 — a first test indicator light;

27-4 — second test indicator light; 27-5-third test indicator light;

27-6-fourth test indicator light; 28-main display screen; 29-main USB to serial circuit;

3-a first press belt; 4-a second press belt; and 5, testing the road.

Detailed Description

As shown in fig. 1, 2, 3, 17 and 18, the wireless transmission type vehicle speed measuring system using a press belt comprises a plurality of sub-device modules 1 for respectively testing instantaneous speeds of a plurality of vehicles when passing through and a main device module 2 wirelessly connected with the plurality of sub-device modules 1, a plurality of belt pressing mechanisms are respectively arranged on a test road 5, the belt pressing mechanisms comprise first press belts 3 and second press belts 4 arranged at intervals along the test road 5, the sub-device module 1 comprises a sub-housing 1-1, a first electronic circuit board arranged in the sub-housing 1-1, a sub-controller 11 integrated on the first electronic circuit board and a sub-wireless communication module 16 connected with the sub-controller 11, a first signal acquisition module 13 connected with the first press belt 3 and a second signal acquisition module 14 connected with the second press belt 4 are connected with input ends of the sub-controller 11, the first signal acquisition module 13 generates a high level signal to the sub-controller 11 when the motor vehicle does not roll the first press belt 3, and the second signal acquisition module 14 generates a high level signal to the sub-controller 11 when the motor vehicle does not roll the second press belt 4; the first signal acquisition module 13 generates a low level signal to the sub-controller 11 when the front wheel of the motor vehicle rolls the first push belt 3, and the sub-controller 11 starts to time to obtain an initial time; the second signal acquisition module 14 generates a low level signal to the sub-controller 11 when the front wheel of the motor vehicle rolls the second push belt 4, and the sub-controller 11 finishes timing to obtain an end time;

the main device module 2 includes a main housing 2-1, a main controller 21 disposed in the main housing 2-1, and a main wireless communication module 26 connected to the main controller 21, and the plurality of sub wireless communication modules 16 perform data wireless communication with the main wireless communication module 26.

In this embodiment, in specific implementation, the first push belt 3 and the second push belt 4 adopt TSJ strip push belt switches, the TSJ strip push belt switch is a rubber-packaged strip switch with a length of 2000mm and a width of 20mm, when the surface of the external force push belt is greater than 40N, the upper and lower copper foil strips in the TSJ strip push belt switch are switched on, the TSJ strip push belt switch is switched on, when the external force disappears, the upper and lower copper foils are separated, and the TSJ strip push belt switch is switched off. In addition, the TSJ strip-shaped press belt switch is strong in dust and water resistance, flexible and convenient to use, high in reliability and suitable for being used for testing road vehicle speed test signals.

It should be noted that, in the actual use process, the first push belt 3 and the second push belt 4 may also adopt other switches that can achieve the same function.

In this embodiment, in specific implementation, the sub-controller 11 and the main controller 21 are both STM32F407VET6Mini controllers. It should be noted that, in practical use, other single-chip microcomputers, ARM sub-controllers, DSP sub-controllers or PLC modules, etc. capable of realizing the same function may be adopted.

In this embodiment, the sub-housing 1-1 is provided with a sub-key module 15, a sub-display screen 18, a first sub-indicator light 17-1, a second sub-indicator light 17-2, and a third sub-indicator light 17-3, the sub-device module 1 further includes a sub-USB serial port circuit 19 and a clock module 10 connected to the sub-controller 11, an output end of the sub-key module 15 is connected to an input end of the sub-controller 11, the sub-display screen 18 is controlled by the sub-controller 11, an output end of the sub-controller 11 is connected to a sub-acousto-optic indicator circuit 17, and the first sub-indicator light 17-1, the second sub-indicator light 17-2, and the third sub-indicator light 17-3 are controlled by the sub-acousto-optic indicator circuit 17;

the main casing 2-1 is provided with a main display screen 28, a first main indicator lamp 27-1, a second main indicator lamp 27-2 and a test environment indicator lamp, the main equipment module 2 further comprises a main USB-to-serial port circuit 29 connected with the main controller 21, a main memory 23 and a USB storage unit circuit 24, the output end of the main controller 21 is connected with a main acousto-optic indicator circuit 27, the main display screen 28 is controlled by the main controller 21, and the first main indicator lamp 27-1 and the second main indicator lamp 27-2 are controlled by the main acousto-optic indicator circuit 27.

As shown in fig. 16, in this embodiment, the sub-key module 15 includes a first key, a second key, a third key, and a fourth key, where the first key, the second key, the third key, and the fourth key are respectively a key S25, a key S26, a key S27, and a key S29, one end of the key S25, one end of the key S26, one end of the key S27, and one end of the key S29 are all grounded, the other end of the key S25 is divided into two paths, one path is connected to the 3.3V power output terminal through a resistor R15, and the other path is connected to a pin PE10 of the sub-controller 11; the other end of the key S26 is divided into two paths, one path is connected with the 3.3V power output end through a resistor R16, and the other path is connected with a PE11 pin of the sub-controller 11; the other end of the key S27 is divided into two paths, one path is connected with the 3.3V power output end through a resistor R47, and the other path is connected with a PE12 pin of the sub-controller 11; the other end of the key S29 is divided into two paths, one path is connected with the 3.3V power output end through a resistor R48, and the other path is connected with a PE13 pin of the sub-controller 11.

As shown in fig. 4, in this embodiment, the sub-device module 1 further includes a sub-power supply module 12, the main device module 2 further includes a main power supply module 22, the sub-power supply module 12 and the main power supply module 22 have the same structure, and the sub-power supply module 12 and the main power supply module 22 both include a chip LM2596-5 and a chip LM2596-3.3, a1 st pin of the chip LM2596-5 is divided into three paths, one path is grounded through a capacitor C15, the other path is grounded through a capacitor C13, and the third path is connected to one end of a fuse F1; the other end of the fuse F1 is connected with a positive output end of a 12V power supply, the 5 th pin and the 3 rd pin of the chip LM2596-5 are both grounded, the connecting ends of the 2 nd pin and the 4 th pin of the chip LM2596-5 are divided into three paths, one path is grounded through a capacitor C14, the other path is grounded through a capacitor C16, and the third path is a 5V power supply output end; the No. 1 pin of the chip LM2596-3.3 is divided into three paths, one path is connected with the output end of a 5V power supply, the other path is grounded through a capacitor C19, and the third path is grounded through a capacitor C22; the connecting end of the 5 th pin and the 3 rd pin of the chip LM2596-3.3 is grounded, the connecting end of the 2 nd pin and the 4 th pin of the chip LM2596-3.3 is divided into four paths, the first path is grounded through a capacitor C20, the second path is grounded through a capacitor C25, the third path is connected with the anode of a light-emitting diode D8 through a resistor R44, and the fourth path is a 3.3V power supply output end; the cathode of the light emitting diode D8 and the negative output end of the 12V power supply are both grounded.

In the embodiment, the chip LM2596-5 is arranged in the sub-equipment module, so that a 12V power supply is converted into a 5V power supply to be output, and the requirements of the sub-acousto-optic indicating circuit 17 and other power supply modules are met; the chip LM2596-3.3 is arranged in the sub-equipment module, so that a 5V power supply is converted into a 3.3V power supply to be output, and the requirements of the sub-controller 11 and other power supply modules are met.

In the embodiment, the chip LM2596-5 is arranged in the main equipment module, so that a 12V power supply is converted into a 5V power supply to be output, and the requirements of the main acousto-optic indicating circuit 27 and other power supply modules are met; the chip LM2596-3.3 is arranged in the main equipment module, so that a 5V power supply is converted into a 3.3V power supply to be output, and the requirements of the main controller 21 and other power supply modules are met.

In this embodiment, in the actual use process, the 12V power supply may adopt a CHS-150-12V switching power supply to supply power, so as to realize the conversion from 12V to 5V, and in addition, the sub power supply module 12 and the main power supply module 22 may further be provided with a 5V/20000MA lithium ion battery as a 5V standby power supply, so as to improve the portability of the device.

As shown in fig. 5, in this embodiment, the sub-audible and visual indicator circuit 17 includes a chip U14 with a model number ULN2003A, the first sub-indicator lamp 17-1 is a light emitting diode D3, the second sub-indicator lamp 17-2 is a light emitting diode D4, the third sub-indicator lamp 17-3 is a light emitting diode D5, the pins 1 to 3 of the chip U14 are respectively connected to pins PE1-PE3 of the sub-controller 11, the pin 7 of the chip U14 is connected to pin PE0 of the sub-controller 11, the pin 9 of the chip U14 is connected to a 5V power output terminal and is grounded via a capacitor C23, the pin 10 of the chip U14 is connected to one end of a buzzer LS1 LS, the other end of the buzzer 1 is connected to a 5V power output terminal, the pin 16 of the chip U14 is connected to a cathode of a light emitting diode D3 via a resistor R39, and an anode of the light emitting diode D3 is connected to a 5V power output terminal, the 15 th pin of the chip U14 is connected with the cathode of the LED D4 through the resistor R40, the anode of the LED D4 is connected with the 5V power output end, the 14 th pin of the chip U14 is connected with the cathode of the LED D5 through the resistor R41, and the anode of the LED D5 is connected with the 5V power output end.

In the present embodiment, the chip U14 serves as a driving element for driving the light emitting diode D3, the light emitting diode D4, and the light emitting diode D5, and the buzzer LS 1.

In this embodiment, the buzzer LS1 is provided to give an alarm when the sub device module 1 fails.

In this embodiment, in specific implementation, the sub-controller 11 outputs a high level to the input terminal of the chip U14, the output terminal of the chip U14 outputs a low level, the light emitting diode D3 and the light emitting diode D4 are bright, the buzzer LS1 alarms, and the sub-controller 11 alternately outputs high and low levels to control the light emitting diode D5 to blink.

In this embodiment, the light emitting diode D3 is used for power indication of the sub-device module to visually check whether power supply is normal;

light emitting diode D4 is used for the sub-equipment module communication indication to see if sub-controller 11 is in normal communication;

the light emitting diode D5 is used for indicating the working state of the push belt, so that when a front wheel of a motor vehicle rolls the first push belt 3, the first push belt 3 is turned on, that is, the switch S1 is closed, the first signal acquisition module 13 outputs a low level signal to the sub-controller 11, the sub-controller 11 controls the third sub-indicator lamp 17-3, that is, the light emitting diode D5 to blink through the chip U14, until when a front wheel of the motor vehicle rolls the second push belt 4, the second push belt 4 is turned on, that is, the switch S2 is closed, the second signal acquisition module 14 outputs a low level signal to the sub-controller 11, and the sub-controller 11 controls the third sub-indicator lamp 17-3, that is, the light emitting diode D5 to not blink through the chip U14, thereby indicating the.

In this embodiment, the number of the test environment indicator lamps is four, and the four test environment indicator lamps are respectively a first test indicator lamp 27-3, a second test indicator lamp 27-4, a third test indicator lamp 27-5 and a fourth test indicator lamp 27-6.

In this embodiment, the first test indicator lamp 27-3, the second test indicator lamp 27-4, the third test indicator lamp 27-5, and the fourth test indicator lamp 27-6 correspond to the test environments such as the highest vehicle speed, the acceleration noise, the acceleration performance, and the maximum climbing capability, respectively.

In this embodiment, the first main indicator light 27-1 is a light emitting diode D14, the second main indicator light 27-2 is a light emitting diode D15, the first test indicator light 27-3 is a light emitting diode D16, the second test indicator light 27-4 is a light emitting diode D17, the third test indicator light 27-5 is a light emitting diode D19, and the fourth test indicator light 27-6 is a light emitting diode D20.

As shown in fig. 6, in this embodiment, the main sound and light indicating circuit 27 includes a chip U8 of the model number ULN2003A, the 1 st pin to the 6 th pin of the chip U8 are respectively connected to pins PE1-PE6 of the main controller 21, the 7 th pin of the chip U8 is connected to pin PE0 of the main controller 21, the 9 th pin of the chip U8 is connected to the 5V power output terminal and is grounded via a capacitor C24, the 10 th pin of the chip U8 is connected to one end of a buzzer LS2, the other end of the buzzer LS2 is connected to the 5V power output terminal, the 16 th pin of the chip U8 is connected to the cathode of a light emitting diode D14 via a resistor R19, the anode of the light emitting diode D14 is connected to the 5V power output terminal, the 15 th pin of the chip U8 is connected to the cathode of the light emitting diode D15 via a resistor R53, the anode of the light emitting diode D15 is connected to the 5V power output terminal, the first pin U8 is connected to the cathode of the light emitting diode 599R 68628, the anode of the light-emitting diode D16 is connected with a 5V power output end, the 13 th pin of the chip U8 is connected with the cathode of the light-emitting diode D17 through a resistor R22, the anode of the light-emitting diode D17 is connected with the 5V power output end, the 12 th pin of the chip U8 is connected with the cathode of the light-emitting diode D19 through a resistor R70, the anode of the light-emitting diode D19 is connected with the 5V power output end, the 11 th pin of the chip U8 is connected with the cathode of the light-emitting diode D20 through a resistor R71, and the anode of the light-emitting diode D20 is connected with the 5V power output end.

In the present embodiment, the chip U8 serves as a driving element for driving the light emitting diode D14, the light emitting diode D15, the light emitting diode D16, the light emitting diode D17, the light emitting diode D19, the light emitting diode D20, and the buzzer LS 2.

In this embodiment, in specific implementation, the main controller 21 outputs a high level to the input terminal of the chip U8, the output terminal of the chip U8 outputs a low level, the light emitting diode D14, the light emitting diode D15, the light emitting diode D16, the light emitting diode D17, the light emitting diode D19, and the light emitting diode D20 are lit, and the buzzer LS2 gives an alarm.

In this embodiment, the light emitting diode D14 is used for power indication of the main device module to visually check whether power supply is normal;

the light emitting diode D15 is used for master device module communication indication to see if the master controller 21 is in normal communication;

the light emitting diode D16, the light emitting diode D17, the light emitting diode D19 and the light emitting diode D20 are used for the vehicle test environment indication monitored by the master device module.

As shown in fig. 7, in this embodiment, the sub-USB serial-to-serial port circuit 19 includes a chip U31 and a chip PL2303HX of a model MAX232ESE, a1 st pin of the chip U31 is connected to a3 rd pin of the chip U31 through a capacitor C9, a 4 th pin of the chip U31 is connected to a 5 th pin of the chip U31 through a capacitor C10, a 11 th pin of the chip U31 is connected to a PA9 pin of the sub-controller 11, a 12 th pin of the chip U31 is connected to a PA10 pin of the sub-controller 11, a 15 th pin of the chip U31 is grounded, a 6 th pin of the chip U31 is grounded through a capacitor C7, a2 nd pin of the chip U31 is connected to a 16 th pin, one of the pins is connected to a 3.3V power output terminal, and the other of the pins is grounded through a capacitor C60;

the 1 st pin of the chip PL2303HX is connected with the 13 th pin of the chip U31, the 5 th pin of the chip PL2303HX is connected with the 14 th pin of the chip U31, the 4 th pin of the chip PL2303HX is connected with the 3.3V power supply output end, the 8 th pin of the chip PL2303HX is connected with the 5V power supply output end, the 15 th pin of the chip PL2303HX is connected with one end of a resistor R52, the other end of the resistor R52 is divided into two paths, one path is connected with the 3.3V power supply output end through a resistor R55, and the D + pin of the other path of USB interface P20 is connected; a 16 th pin of the chip PL2303HX is connected with one end of a resistor R51, the other end of the resistor R51 is connected with a D-pin of a USB interface P20, a 17 th pin of the chip PL2303HX is divided into two paths, one path is connected with a 3.3 power supply output end, and the other path is grounded through a capacitor C6; a 19 th pin, a 20 th pin and a 24 th pin of the chip PL2303HX are all connected with a 5V power supply output end, a 22 nd pin of the chip PL2303HX is connected with the 5V power supply output end through a resistor R50, a 23 rd pin of the chip PL2303HX is grounded through a resistor R49, a 27 th pin of the chip PL2303HX is divided into two paths, one path is connected with one end of a crystal oscillator Y1, and the other path is grounded through a capacitor C51; the 28 th pin of the chip PL2303HX is connected with the other end of the crystal oscillator Y1, and the other path is grounded through a capacitor C4.

In this embodiment, the sub-USB to serial port circuit 19 is provided to realize rotation from the RS232 level to the TTL level, and thus serves as a USB/RS232 bidirectional converter to perform data communication between the sub-controller 11 and the monitoring computer. In addition, the speed measuring device can be used as a standby communication interface, so that the wired connection between the speed measuring device and a monitoring computer is convenient to realize, and the problem that the wireless connection fault cannot be remotely monitored is avoided.

In this embodiment, the crystal oscillator Y1 in the sub USB serial-to-serial port circuit 19 is configured to provide a clock signal to the chip PL2303HX, and the capacitor C51 and the capacitor C4 are configured as oscillation starting capacitors. The resistor R52 and the resistor R51 are provided to prevent the reflection phenomenon of the high-speed signal at the USB interface. Resistor R55 is provided to perform an enumeration function as a pull-up resistor.

As shown in fig. 8, in this embodiment, the main USB to serial port circuit 29 includes a chip U32 and a chip CH340G with a model of MAX232ESE, a1 st pin of the chip U32 is connected to a3 rd pin of the chip U32 through a capacitor C66, a 4 th pin of the chip U32 is connected to a 5 th pin of the chip U32 through a capacitor C65, a 11 th pin of the chip U32 is connected to a PA9 pin of the main controller 21, a 12 th pin of the chip U32 is connected to a PA10 pin of the main controller 21, a 15 th pin of the chip U32 is grounded, a 6 th pin of the chip U32 is grounded through a capacitor C68, a2 nd pin of the chip U32 is connected to a 16 th pin, one of the two paths are connected to a 3.3V power output terminal, and the other path is grounded through a capacitor C67; the 1 st pin of the chip CH340G is grounded, the 2 nd pin of the chip CH340G is connected with the cathode of a diode D23, the anode of the diode D23 is connected with the 13 th pin of the chip U32, the 3 rd pin of the chip CH340G is connected with the 14 th pin of the chip U32 through a resistor R61, the 4 th pin of the chip CH340G is divided into two paths, one path is connected with a 3.3V power output end, and the other path is grounded through a capacitor C8; a 5 th pin of the chip CH340G is connected with a D + pin of a USB interface P22, a 6 th pin of the chip CH340G is connected with a D-pin of a USB interface P22, and a 7 th pin of the chip CH340G is divided into two paths, wherein one path is connected with one end of a crystal oscillator Y3, and the other path is grounded through a capacitor C45; the 8 th pin of the chip CH340G is connected with the other end of the crystal oscillator Y3, and the other path is grounded through a capacitor C46; the 16 th pin of the chip CH340G is divided into two paths, one path is connected with the output end of a 3.3V power supply, and the other path is grounded through a capacitor C47.

In this embodiment, the main USB to serial port circuit 29 is provided to realize rotation from the RS232 level to the TTL level, and thus serves as a USB/RS232 bidirectional converter for data communication between the main controller 21 and other computers. In addition, it may serve as a backup communication interface.

As shown in fig. 9 and 10, in this embodiment, the first signal acquiring module 13 includes a chip U2 with a model of PC817, one end of the first push belt 3 is a contact of a switch S1, the other end of the first push belt 3 is another contact of a switch S1, an anode of the chip U2 is connected to the 5V power output terminal through a resistor R32, a cathode of the chip U2 is connected to another contact of a switch S1, a collector of the chip U2 is divided into two paths, one path is connected to the 3.3V power output terminal through a resistor R1, and the other path is the output terminal of the first signal acquiring module 13; the emitter of the chip U2 and one contact of the switch S1 are grounded;

the second signal acquisition module 14 comprises a chip U4 with a model of PC817, one end of the second push belt 4 is a contact of a switch S2, the other end of the second push belt 4 is another contact of a switch S2, an anode of the chip U4 is connected with the 5V power output end through a resistor R4, a cathode of the chip U4 is connected with another contact of a switch S2, a collector of the chip U4 is divided into two paths, one path is connected with the 3.3V power output end through the resistor R3, and the other path is the output end of the second signal acquisition module 14; the emitter of the chip U4 and one contact of the switch S2 are grounded.

In this embodiment, the output end of the first signal acquisition module 13 is connected to a pin PD8 of the sub-controller 11, and the output end of the second signal acquisition module 14 is connected to a pin PD9 of the sub-controller 11. In the actual connection process, the output end of the first signal acquisition module 13 and the output end of the second signal acquisition module 14 may also be connected to other IO ports of the sub-controller 11, so as to realize the acquisition of high and low level signals.

In this embodiment, the sub-button module 15 is configured to input a distance between the first push belt 3 and the second push belt 4 to the sub-controller 11.

In this embodiment, in specific implementation, when a front wheel of a motor vehicle rolls a first push belt 3, the first push belt 3 is turned on, that is, the switch S1 is closed, the first signal acquisition module 13 outputs a low level signal to the sub-controller 11, the sub-controller 11 obtains a start time, the sub-controller 11 controls the third sub-indicator lamp 17-3, that is, the light emitting diode D5, to flash through the chip ULN2003A until the front wheel of the motor vehicle rolls a second push belt 4, the second push belt 4 is turned on, that is, the switch S2 is closed, the second signal acquisition module 14 outputs a low level signal to the sub-controller 11, the sub-controller 11 obtains an end time, and a time difference between the front wheel of the motor vehicle and the start time is obtained according to a difference between the end time and. The sub-controller 11 divides the distance between the first pressing belt 3 and the second pressing belt 4 by the time difference to obtain the instantaneous speed of the motor vehicle passing through the test point, and according to the change of the level signal, the sub-controller obtains the time difference of rolling the two pressing belts by the front wheel of the motor vehicle, so that the accuracy of obtaining the time difference is improved, and the accuracy of testing the speed of the motor vehicle is further improved.

In this embodiment, the sub-display 18 is provided to display the speed of the vehicle for easy viewing.

As shown in fig. 11 and 12, in this embodiment, the sub wireless communication module 16 is a 2.4G wireless rf communication module U15 with model ZA2530-2591, a Rest pin of the sub wireless communication module 16 is divided into two paths, one path is grounded via a capacitor C63, and the other path is connected to a 3.3V power output terminal via a resistor R57; the P1.0 pin of the sub wireless communication module 16 is connected with the anode of a light emitting diode D7 through a resistor R43, the cathode of the light emitting diode D7 is grounded, the P1.3 of the sub wireless communication module 16 is divided into two paths, one path is connected with a 3.3V power output end through a resistor R37, and the other path is connected with the 3 rd pin of a toggle switch S13; the P1.5 of the sub wireless communication module 16 is divided into two paths, one path is connected with the 3.3V power output end through a resistor R36, and the other path is connected with the 4 th pin of a toggle switch S13; the 1 st pin and the 2 nd pin of the toggle switch S13 are grounded, the P1.6 pin of the sub wireless communication module 16 is connected with the PA3 pin of the sub controller 11, the P1.7 pin of the sub wireless communication module 16 is connected with the PA2 pin of the sub controller 11, the VDD pin of the sub wireless communication module 16 is connected with the 3.3V power output end and is grounded through a capacitor C11, and the GND of the sub wireless communication module 16 is grounded;

the main wireless communication module 26 is a 2.4G wireless radio frequency communication module U20 with the model number ZA2530-2591, a Rest pin of the main wireless communication module 26 is divided into two paths, one path is grounded through a capacitor C64, and the other path is connected with a 3.3V power supply output end through a resistor R60; the P1.0 pin of the main wireless communication module 26 is connected with the anode of a light-emitting diode D18 through a resistor R45, the cathode of the light-emitting diode D18 is grounded, the P1.3 of the main wireless communication module 26 is divided into two paths, one path is connected with a 3.3V power output end through a resistor R24, and the other path is connected with the 3 rd pin of a toggle switch S16; the P1.5 of the main wireless communication module 26 is divided into two paths, one path is connected with a 3.3V power supply output end through a resistor R23, and the other path is connected with a 4 th pin of a toggle switch S16; the 1 st pin and the 2 nd pin of the toggle switch S16 are grounded, the P1.6 pin of the main wireless communication module 26 is connected with the PA3 pin of the main controller 21, the P1.7 pin of the main wireless communication module 26 is connected with the PA2 pin of the main controller 21, the VDD pin of the main wireless communication module 26 is connected with the 3.3V power output end and is grounded through a capacitor C42, and the GND of the main wireless communication module 26 is grounded.

As shown in fig. 13 and 14, in the present embodiment, the main memory 23 includes a chip AT24C256, the 1 st pin to the 4 th pin of the chip AT24C256 are all grounded, the 5 th pin of the chip AT24C256 is divided into two paths, one path is connected to the 3.3V power output terminal through a resistor R66, and the other path is connected to the PC9 pin of the main controller 21; the 6 th pin of the chip AT24C256 is divided into two paths, one path is connected with the 3.3V power supply output end through a resistor R65, and the other path is connected with a PA8 pin of the main controller 21; the 8 th pin of the AT24C256 chip is divided into two paths, one path is grounded through a capacitor C27, and the other path is connected with the output end of a 3.3V power supply;

the USB storage unit circuit 24 comprises a chip CH376S, pins 15-22 of the chip CH376S are respectively connected with pins PD8-PD15 of the main controller 21, pins 3, 4, 23, 8 and 1 of the chip CH376S are respectively connected with pins PB14, PB15, PB12, PB13 and PC6 of the main controller 21, pin 10 of the chip CH376S is connected with a pin D + of the USB interface P21, pin 11 of the chip CH376S is connected with a pin D of the USB interface P21, pin 13 of the chip CH376S is divided into two paths, one path is connected with one end of the crystal Y4, and the other path is grounded through a capacitor C70; the 14 th pin of the chip CH376S is divided into two paths, one path is connected with the other end of the crystal oscillator Y4, and the other path is grounded through a capacitor C69.

In this embodiment, the sub wireless communication module 16 and the main wireless communication module 26 are provided to facilitate wireless data communication between the main device module and the plurality of sub device modules, so that the plurality of sub device modules are wirelessly connected with the main device module, thereby reducing the field arrangement time and difficulty before testing; in addition, signal loss or error caused by transmission cable faults or signal interference is avoided, and the accuracy of test data acquisition is improved; secondly, be convenient for to the control of a plurality of sub-equipment modules, be convenient for centralized management, be convenient for the speed measuring of a plurality of motor vehicles, the simple operation.

It should be noted that, in actual use, the sub wireless communication module 16 and the main wireless communication module 26 may also adopt other modules that can implement wireless transmission, such as bluetooth.

In the present embodiment, the USB memory unit circuit 24 is provided to copy and store test data stored in the host device module in a USB disk for data export.

In this embodiment, in specific implementation, the sub-controller 11 sends out the obtained instantaneous speed test value of the motor vehicle passing through the test point through the sub-wireless communication module 16, the main wireless communication module 26 receives the instantaneous speed test value of the motor vehicle passing through the test point sent out by the sub-wireless communication module 16 and sends the instantaneous speed test value to the main controller 21, and the main controller 21 displays the motor vehicle speed test value through the main display screen 28, so as to facilitate checking; in addition, the main controller 21 stores the speed test value of the motor vehicle in the main memory 23 for data analysis.

As shown in fig. 15, in this embodiment, the clock circuit 10 includes a chip DS1302, a1 st pin of the chip DS1302 is divided into two paths, one path is connected to a 5V power output terminal through a resistor R9, and the other path is grounded through a capacitor C50; the 6 th pin of the chip DS1302 is divided into two paths, one path is connected with a PB7 pin of the sub-controller 11, and the other path is connected with a 5V power supply output end through a resistor R8; the 7 th pin of the chip DS1302 is divided into two paths, one path is connected with a PB5 pin of the sub-controller 11, and the other path is connected with a 5V power supply output end through a resistor R6; the 5 th pin of the chip DS1302 is divided into two paths, one path is connected with a PB6 pin of the sub-controller 11, and the other path is connected with a 5V power supply output end through a resistor R7; the 2 nd pin of the chip DS1302 is connected with one end of a crystal oscillator Y10, the 3 rd pin of the chip DS1302 is connected with the other end of a crystal oscillator Y10, and the 4 th pin of the chip DS1302 is grounded.

Fig. 19 shows a method for measuring speed of a wireless transmission type motor vehicle using a push belt, which comprises the following steps:

step one, arranging a belt pressing mechanism:

101, respectively arranging a plurality of belt pressing mechanisms at a plurality of test points along the ith test road 5; each belt pressing mechanism comprises a first belt pressing 3 and a second belt pressing 4 which are arranged at intervals along a test road 5, and the distance between the first belt pressing 3 and the second belt pressing 4 on the ith test road 5 is S_iI is a positive integer, S_iThe value range of (A) is 0.5 m-1 m;

102, laying a sub-equipment module 1 on one side of an ith test road 5, and recording the sub-equipment module as an ith sub-equipment module;

103, inputting the distance S between the adjacent first press belt 3 and the second press belt 4 on the ith test road 5 through the sub-key module 15 of the ith sub-equipment module_iSub-controllers 11 to the ith sub-plant module;

step two, data acquisition and data processing:

step 201, the motor vehicle moves along the ith test road 5, when the front wheel of the motor vehicle rolls the first press belt 3 on the ith test road 5, the first press belt 3 is switched on, the first press belt 3 outputs a low level signal to the first signal acquisition module 13, the first signal acquisition module 13 outputs a low level signal to the sub-controller 11, the sub-controller 11 controls the third sub-indicator 17-3, namely the light emitting diode D5, to flash through the sub-acousto-optic indicator circuit 17, and the sub-controller 11 obtains the starting time through the clock module 10 and records the starting time as t_i0The start time t to be obtained by the sub-controller 11_i0The light is emitted through the sub wireless communication module 16, the sub controller 11 controls the second sub indicator light 17-2, namely the light emitting diode D4, to be on through the sub acousto-optic indicator circuit 17, and the main controller 21 obtains the starting time t through the main wireless communication module 26_i0The main controller 21 controls the second main indicating lamp 27-2, i.e. the light emitting diode D15, to be turned on through the main audio-visual indicating circuit 27, and the main controller 21 also displays the starting time t through the main display 28_i0；

Step 202, after the rear wheel of the motor vehicle rolls over the first push belt 3 on the ith test road 5, the first push belt 3 is disconnected, the first signal acquisition module 13 outputs a high-level signal to the sub-controller 11, and the sub-controller 11 controls the third sub-indicator light 17-3, namely the light emitting diode D5, not to flicker through the sub-acousto-optic indicator circuit 17;

step 203, when the front wheel of the motor vehicle rolls the second push belt 4 on the ith test road 5, the second push belt 4 is switched on, the second push belt 4 outputs a low level signal to the second signal acquisition module 14, the second signal acquisition module 14 outputs a low level signal to the sub-controller 11, the sub-controller 11 controls the third sub-indicator 17-3, namely the light emitting diode D5, to flash again through the sub-acousto-optic indicator circuit 17, and the sub-controller 11 obtains the end time through the clock module 10 and records the end time as t_i1The end time t to be obtained by the sub-controller 11_i1The light is emitted through the sub wireless communication module 16, the sub controller 11 controls the second sub indicator light 17-2, namely the light emitting diode D4, to be on through the sub acousto-optic indicator circuit 17, and the main controller 21 obtains the ending time t through the main wireless communication module 26_i1The main controller 21 controls the second main indicating lamp 27-2, i.e. the light emitting diode D15, to be turned on through the main audio-visual indicating circuit 27, and the main controller 21 also displays the ending time t through the main display 28_i1；

Step 204, after the rear wheel of the motor vehicle rolls over the second push belt 4 on the ith test road 5, the second push belt 4 is disconnected, the second signal acquisition module 14 outputs a high-level signal to the sub-controller 11, and the sub-controller 11 controls the third sub-indicator light 17-3, namely the light emitting diode D5, not to flicker through the sub-acousto-optic indicator circuit 17;

step 205, the sub-controller 11 calculates the formula t_i＝t_i1-t_i0Obtaining the running time t of the motor vehicle on the ith test road 5 passing through the test point_i(ii) a At the same time, the sub-controller 11 will obtain the vehicle running time t on the ith test road 5_iThe signal is transmitted by the sub wireless communication module 16, the sub controller 11 controls the second sub indicator light 17-2, namely the light emitting diode D4, to be on by the sub acousto-optic indicator circuit 17, and the main controller 21 obtains the driving time t of the motor vehicle on the ith test road 5 by the main wireless communication module 26_iThe main controller 21 controls the second main indicating lamp 27-2, i.e. the light emitting diode D15, to be on through the main acousto-optic indicating circuit 27, and the main controller 21 also displays the vehicle running time t on the ith test road 5 through the main display 28_i；

Step 206, the sub-controller 11 according to the formula

Obtaining the instantaneous speed V of the motor vehicle on the ith test road 5 passing through the test point_i；

Step three, data judgment alarm reminding:

step 301, the sub-controller 11 obtains the instantaneous speed V of the motor vehicle passing the test point on the ith test road 5_iThe light is emitted through the sub wireless communication module 16, and meanwhile, the sub controller 11 controls the second sub indicator light 17-2, namely the light emitting diode D4, to be on through the sub acousto-optic indicator circuit 17;

step 302, the main controller 21 obtains the instantaneous speed V of the motor vehicle passing the test point on the ith test road 5 through the main wireless communication module 26_iMeanwhile, the main controller 21 controls the second main indicator light 27-2, namely the light emitting diode D15, to be on through the main acousto-optic indicator circuit 27;

step 303, the main controller 21 obtains the instantaneous speed V of the motor vehicle passing the test point on the ith test road 5_iAnd a speed threshold V_sComparing, and when the motor vehicle on the ith test road 5 passes through the instantaneous speed V of the test point_iNot meeting the speed threshold V_sWhen the alarm is given, the main controller 21 controls the buzzer LS2 to give an alarm through the main acousto-optic indicating circuit 27, and the main controller 21 displays an NG alarm through the main display 28;

when the motor vehicle on the ith test road 5 passes through the test point, the instantaneous speed V_iMeet speed threshold V_sAnd the main controller 21 displays an OK reminder through the main display 28.

In this embodiment, between the layout of the belt pressing mechanism in the first step and the data acquisition and data processing in the second step, a system test needs to be performed, and the specific process is as follows:

step A, confirming that the sub power supply module 12 supplies power to the sub controller 11 normally, the sub controller 11 controls the first sub indicator lamp 17-1, namely the diode D3, to be on through the sub acousto-optic indicating circuit 17;

step B, confirming that the first press belt 3 is normally connected with the sub-controller 11 through the first signal acquisition module 13, and confirming that the second press belt 4 is normally connected with the sub-controller 11 through the second signal acquisition module 14;

step C, confirming that the sub key module 15, the clock module 10, the sub wireless communication module 16, the sub acousto-optic indicating circuit 17 and the sub display screen 18 are normally connected with the sub controller 11;

step D, confirming that the main power supply module 22 supplies power to the main controller 21 normally, the main controller 21 controls the first main indicator lamp 27-1, namely the light emitting diode D14, to be on through the main acousto-optic indicating circuit 27;

step E, confirming that the main memory 23, the main wireless communication module 26, the main acousto-optic indication circuit 27 and the main display 28 are normally connected with the main controller 21;

and F, confirming that the communication between the sub wireless communication module 16 and the main wireless communication module 26 is normal, and finishing the initial check of each module.

In this embodiment, according to the method described in the first to third steps, in the process that the motor vehicle returns to pass through the second belt press 4 and the first belt press 3 in sequence, the instantaneous speed V of the motor vehicle returning on the ith test road 5 is obtained_i′；

According to the formula

Obtaining the deviation value e of the round trip speed of the motor vehicle on the ith test road 5, and setting the deviation value e of the round trip speed of the motor vehicle on the ith test road 5 and the deviation set value e of the round trip speed of the motor vehicle_sComparing, when e is less than or equal to e_sTime, the instantaneous speed V of the return of the motor vehicle on the ith test road 5 is illustrated_i' and the instantaneous speed V of the motor vehicle on the ith test road 5 passing through the test point_iEffective according to the formula

Obtaining a corrected instantaneous speed of the motor vehicle on the ith test road 5

When e is>e_sWhen the speed is zero, the instantaneous speed of the vehicle on the ith test road 5 is shownDegree V_i' and the instantaneous speed V of the motor vehicle on the ith test road 5 passing through the test point_iAnd if the vehicle is invalid, re-detecting the vehicle according to the method from the first step to the third step.

In this embodiment, the deviation set value e of the back-and-forth speed of the motor vehicle_sIs not more than 3%.

In this embodiment, it should be noted that the first signal acquisition module 13 generates a low level signal when the rear wheel of the vehicle rolls the first push belt 3, but determines that the signal is invalid, the second signal acquisition module 14 generates a low level signal when the rear wheel of the vehicle rolls the second push belt 4, and the sub-controller 11 determines that the test is finished and resets the test.

In this embodiment, the speed threshold V_sCan be set according to the test requirements. And it should be noted that the speed threshold V_sAnd the instantaneous speed of the motor vehicle passing the test point

And (4) relationship.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides an utilize wireless transmission formula motor vehicle speed measurement system of pressing area which characterized in that: the system comprises a plurality of sub-equipment modules (1) for testing the instantaneous speed of a plurality of motor vehicles when the motor vehicles pass through and a main equipment module (2) in wireless connection with the plurality of sub-equipment modules (1), wherein a plurality of belt pressing mechanisms are respectively arranged on a test road (5), each belt pressing mechanism comprises a first belt pressing (3) and a second belt pressing (4) which are arranged at intervals along the test road (5), each sub-equipment module (1) comprises a sub-shell (1-1), a first electronic circuit board arranged in the sub-shell (1-1), a sub-controller (11) integrated on the first electronic circuit board and a sub-wireless communication module (16) connected with the sub-controller (11), the input end of the sub-controller (11) is connected with a first signal acquisition module (13) connected with the first belt pressing (3) and a second signal acquisition module (14) connected with the second belt pressing (4), the first signal acquisition module (13) generates a high-level signal to the sub-controller (11) when the motor vehicle does not roll the first press belt (3), and the second signal acquisition module (14) generates a high-level signal to the sub-controller (11) when the motor vehicle does not roll the second press belt (4); the first signal acquisition module (13) generates a low level signal to the sub-controller (11) when the front wheel of the motor vehicle rolls the first push belt (3), and the sub-controller (11) starts to time to obtain an initial moment; the second signal acquisition module (14) generates a low level signal to the sub-controller (11) when the front wheel of the motor vehicle rolls the second push belt (4), and the sub-controller (11) finishes timing to obtain an end time;

the main equipment module (2) comprises a main shell (2-1), a second electronic circuit board arranged in the main shell (2-1), a main controller (21) integrated on the second electronic circuit board and a main wireless communication module (26) connected with the main controller (21), and the plurality of sub wireless communication modules (16) are in data wireless communication with the main wireless communication module (26).

2. A system for measuring the speed of a motor vehicle by wireless transmission using a push belt according to claim 1, wherein: the sub-shell (1-1) is provided with a sub-key module (15) and a sub-display screen (18), a first sub-indicator light (17-1), a second sub-indicator light (17-2) and a third sub-indicator light (17-3), the sub-equipment module (1) further comprises a sub-USB (universal serial bus) to serial port circuit (19) and a clock module (10) which are connected with a sub-controller (11), the output end of the sub-key module (15) is connected with the input end of the sub-controller (11), the sub-display screen (18) is controlled by the sub-controller (11), the output end of the sub-controller (11) is connected with a sub-acousto-optic indicator circuit (17), and the first sub-indicator light (17-1), the second sub-indicator light (17-2) and the third sub-indicator light (17-3) are controlled by the sub-acousto-optic indicator circuit (17);

the main casing body (2-1) is provided with a main display screen (28), a first main indicator lamp (27-1), a second main indicator lamp (27-2) and a test environment indicator lamp, the main equipment module (2) further comprises a main USB serial port circuit (29) connected with the main controller (21), a main memory (23) and a USB storage unit circuit (24), the output end of the main controller (21) is connected with a main acousto-optic indicator circuit (27), the main display screen (28) is controlled by the main controller (21), and the first main indicator lamp (27-1) and the second main indicator lamp (27-2) are controlled by the main acousto-optic indicator circuit (27).

3. A system for measuring the speed of a motor vehicle by wireless transmission using a push belt according to claim 1, wherein: the sub-device module (1) further comprises a sub-power supply module (12), the main device module (2) further comprises a main power supply module (22), the sub-power supply module (12) and the main power supply module (22) are identical in structure, and the sub-power supply module (12) and the main power supply module (22) respectively comprise a chip LM2596-5 and a chip LM 2596-3.3.

4. A system for measuring the speed of a motor vehicle by wireless transmission using a push belt according to claim 1, wherein: the sub acousto-optic indicating circuit (17) comprises a chip U14 with the model number of ULN2003A, pins 1 to 3 of the chip U14 are respectively connected with a sub-controller (11), pin 7 of the chip U14 is connected with the sub-controller (11), pin 9 of the chip U14 is connected with a 5V power supply output end and is grounded through a capacitor C23, pin 10 of the chip U14 is connected with one end of a buzzer LS1, the other end of the buzzer LS1 is connected with the 5V power supply output end, pin 16 of the chip U14 is connected with the cathode of a light-emitting diode D3 through a resistor R39, the anode of the light-emitting diode D3 is connected with the 5V power supply output end, pin 15 of the chip U14 is connected with the cathode of a light-emitting diode D4 through a resistor R40, the anode of the light-emitting diode D4 is connected with the 5V power supply output end, pin 14 of the chip U14 is connected with the cathode of a light-emitting diode D5 through a resistor R41, and the anode of the light-emitting diode D5 is connected with the 5V power supply output end.

5. A system for measuring the speed of a motor vehicle by wireless transmission using a push belt according to claim 1, wherein: the main acousto-optic indicating circuit (27) comprises a chip U8 with the model number of ULN2003A, pins 1 to 6 of the chip U8 are respectively connected with a main controller (21), pin 7 of the chip U8 is connected with the main controller (21), pin 9 of the chip U8 is connected with a 5V power output end and is grounded through a capacitor C24, pin 10 of the chip U8 is connected with one end of a buzzer LS2, the other end of the buzzer LS2 is connected with the 5V power output end, pin 16 of the chip U8 is connected with the cathode of a light emitting diode D14 through a resistor R19, the anode of the light emitting diode D14 is connected with the 5V power output end, pin 15 of the chip U8 is connected with the cathode of a light emitting diode D15 through a resistor R53, the anode of the light emitting diode D15 is connected with the 5V power output end, pin 14 of the chip U8 is connected with the cathode of a light emitting diode D16 through a resistor R54, the anode of the light-emitting diode D16 is connected with a 5V power output end, the 13 th pin of the chip U8 is connected with the cathode of the light-emitting diode D17 through a resistor R22, the anode of the light-emitting diode D17 is connected with the 5V power output end, the 12 th pin of the chip U8 is connected with the cathode of the light-emitting diode D19 through a resistor R70, the anode of the light-emitting diode D19 is connected with the 5V power output end, the 11 th pin of the chip U8 is connected with the cathode of the light-emitting diode D20 through a resistor R71, and the anode of the light-emitting diode D20 is connected with the 5V power output end.

6. A system for measuring the speed of a motor vehicle by wireless transmission using a push belt according to claim 1, wherein: the first signal acquisition module (13) comprises a chip U2 with the model of PC817, one end of a first push belt (3) is a contact of a switch S1, the other end of the first push belt (3) is another contact of a switch S1, the anode of the chip U2 is connected with a 5V power output end through a resistor R32, the cathode of the chip U2 is connected with another contact of a switch S1, the collector of the chip U2 is divided into two paths, one path is connected with a 3.3V power output end through the resistor R1, and the other path is the output end of the first signal acquisition module (13); the emitter of the chip U2 and one contact of the switch S1 are grounded;

the second signal acquisition module (14) comprises a chip U4 with the model of PC817, one end of a second push belt (4) is a contact of a switch S2, the other end of the second push belt (4) is another contact of a switch S2, the anode of the chip U4 is connected with the 5V power output end through a resistor R4, the cathode of the chip U4 is connected with the other contact of the switch S2, the collector of the chip U4 is divided into two paths, one path is connected with the 3.3V power output end through the resistor R3, and the other path is the output end of the second signal acquisition module (14); the emitter of the chip U4 and one contact of the switch S2 are grounded.

7. A method of measuring speed of a motor vehicle using the system of claim 1, wherein: the method comprises the following steps:

step one, arranging a belt pressing mechanism:

101, respectively arranging a plurality of belt pressing mechanisms at a plurality of test points along an ith test road (5); each belt pressing mechanism comprises a first belt pressing (3) and a second belt pressing (4) which are arranged at intervals along a test road (5), and the distance between the first belt pressing (3) and the second belt pressing (4) on the ith test road (5) is S_iI is a positive integer, S_iThe value range of (A) is 0.5 m-1 m;

102, laying a sub-equipment module (1) on one side of an ith test road (5), and recording the sub-equipment module as an ith sub-equipment module;

103, inputting the distance S between the adjacent first press belt (3) and the second press belt (4) on the ith test road (5) through the sub-key module (15) of the ith sub-equipment module_iA sub-controller (11) to the ith sub-plant module;

step two, data acquisition and data processing:

step 201, motor vehicle along the firstThe i test roads (5) move, when a front wheel of the motor vehicle rolls a first press belt (3) on the ith test road (5), the first press belt (3) is switched on, the first press belt (3) outputs a low level signal to a first signal acquisition module (13), the first signal acquisition module (13) outputs a low level signal to a sub-controller (11), the sub-controller (11) controls a third sub-indicator lamp (17-3) to flicker through a sub-acousto-optic indicator circuit (17), and the sub-controller (11) obtains an initial moment through a clock module (10) and records the initial moment as t_i0The sub-controller (11) will obtain the starting time t_i0The light is emitted through the sub wireless communication module (16), the sub controller (11) controls the second sub indicator light (17-2) to be on through the sub acousto-optic indicator circuit (17), and the main controller (21) obtains the starting time t through the main wireless communication module (26)_i0The main controller (21) controls the second main indicator light (27-2) to be on through the main acousto-optic indicator circuit (27), and the main controller (21) also displays the starting time t through the main display screen (28)_i0；

Step 202, after a rear wheel of the motor vehicle rolls over a first press belt (3) on an i test road (5), the first press belt (3) is disconnected, a first signal acquisition module (13) outputs a high-level signal to a sub-controller (11), and the sub-controller (11) controls a third sub-indicator light (17-3) not to flicker through a sub-acousto-optic indicator circuit (17);

step 203, when the front wheel of the motor vehicle rolls the second press belt (4) on the ith test road (5), the second press belt (4) is switched on, the second press belt (4) outputs a low level signal to the second signal acquisition module (14), the second signal acquisition module (14) outputs a low level signal to the sub-controller (11), the sub-controller (11) controls the third sub-indicator lamp (17-3) to flash again through the sub-acousto-optic indicator circuit (17), and the sub-controller (11) obtains the end time through the clock module (10) and records the end time as t_i1The sub-controller (11) will obtain the end time t_i1The light is emitted through the sub wireless communication module (16), the sub controller (11) controls a second sub indicator lamp (17-2), namely a light emitting diode D4, to be on through the sub acousto-optic indicator circuit (17), and the main controller (21) obtains the ending time t through the main wireless communication module (26)_i1The main controller (21) controls the second main indicator light (27-2) to be on through the main acousto-optic indicator circuit (27), and the main controller (21) also displays the end time through the main display screen (28)Moment t_i1；

Step 204, after the rear wheel of the motor vehicle rolls over the second press belt (4) on the ith test road (5), the second press belt (4) is disconnected, the second signal acquisition module (14) outputs a high-level signal to the sub-controller (11), and the sub-controller (11) controls the third sub-indicator light (17-3) not to flicker through the sub-acousto-optic indicator circuit (17);

step 205, the sub-controller (11) according to the formula t_i＝t_i1-t_i0Obtaining the running time t of the motor vehicle on the ith test road (5) passing through the test point_i(ii) a Meanwhile, the sub-controller (11) obtains the driving time t of the motor vehicle on the ith test road (5)_iThe test signal is transmitted through the sub wireless communication module (16), the sub controller (11) controls the second sub indicator lamp (17-2) to be on through the sub acousto-optic indicator circuit (17), and the main controller (21) obtains the motor vehicle running time t on the ith test road (5) through the main wireless communication module (26)_iThe main controller (21) controls the second main indicating lamp (27-2) to be on through the main acousto-optic indicating circuit (27), and the main controller (21) also displays the running time t of the motor vehicle on the ith test road (5) through the main display screen (28)_i；

Step 206, the sub-controller (11) according to the formula

Obtaining the instantaneous speed V of the motor vehicle passing the test point on the ith test road (5)_i；

Step three, data judgment alarm reminding:

step 301, the sub-controller (11) obtains the instantaneous speed V of the motor vehicle passing the test point on the ith test road (5)_iThe light is emitted through the sub wireless communication module (16), and meanwhile, the sub controller (11) controls the second sub indicator lamp (17-2) to be on through the sub acousto-optic indicator circuit (17);

step 302, the main controller (21) obtains the instantaneous speed V of the motor vehicle passing the test point on the ith test road (5) through the main wireless communication module (26)_iMeanwhile, the main controller (21) controls a second main indicator lamp (27-2) to be turned on through a main acousto-optic indicator circuit (27);

step 303, the main controller (21) obtains the instantaneous speed V of the motor vehicle passing the test point on the ith test road (5)_iAnd a speed threshold V_sComparing, and when the vehicle on the ith test road (5) passes the instantaneous speed V of the test point_iNot meeting the speed threshold V_sWhen the alarm is given, the main controller (21) controls the buzzer LS2 to give an alarm through the main acousto-optic indicating circuit (27), and the main controller (21) displays an NG alarm through the main display screen (28);

when the motor vehicle on the ith test road (5) passes through the test point, the instantaneous speed V_iMeet speed threshold V_sWhen the user wants to use the system, the main controller (21) displays the OK prompt through the main display screen (28).

8. The method of claim 7, wherein: and (3) between the layout of the belt pressing mechanism in the step one and the data acquisition and data processing in the step two, the system test is required, and the specific process is as follows:

step A, confirming that the sub power supply module (12) supplies power to the sub controller (11) normally, and controlling the first sub indicator lamp (17-1) to be on by the sub controller (11) through the sub acousto-optic indicator circuit (17);

step B, confirming that the first press belt (3) is normally connected with the sub-controller (11) through the first signal acquisition module (13), and confirming that the second press belt (4) is normally connected with the sub-controller (11) through the second signal acquisition module (14);

step C, confirming that the sub key module (15), the clock module (10), the sub wireless communication module (16), the sub acousto-optic indicating circuit (17) and the sub display screen (18) are normally connected with the sub controller (11);

d, confirming that the main power supply module (22) supplies power to the main controller (21) normally, and controlling a first main indicator lamp (27-1) to be on by the main controller (21) through a main acousto-optic indicating circuit (27);

step E, confirming that the main memory (23), the main wireless communication module (26), the main acousto-optic indicating circuit (27) and the main display screen (28) are normally connected with the main controller (21);

and F, confirming that the communication between the sub wireless communication module (16) and the main wireless communication module (26) is normal, and finishing the initial check of each module.

9. The method of claim 7, wherein: according to the method from the first step to the third step, the returning instantaneous speed V of the motor vehicle on the ith test road (5) is obtained in the process that the motor vehicle returns to pass through the second press belt (4) and the first press belt (3) in sequence_i′；

According to the formula

Obtaining the deviation value e of the round trip speed of the motor vehicle on the ith test road (5), and setting the deviation value e of the round trip speed of the motor vehicle on the ith test road (5) and the deviation set value e of the round trip speed of the motor vehicle_sComparing, when e is less than or equal to e_sWhen the speed of the vehicle on the ith test road (5) is within the range of the speed of the vehicle_i' and the instantaneous speed V of the motor vehicle passing the test point on the ith test road (5)_iEffective according to the formula

Obtaining a corrected instantaneous speed of the motor vehicle on the ith test road (5)

When e is>e_sWhen the speed of the vehicle on the ith test road (5) is within the range of the speed of the vehicle_i' and the instantaneous speed V of the motor vehicle passing the test point on the ith test road (5)_iAnd if the vehicle is invalid, re-detecting the vehicle according to the method from the first step to the third step.

10. The method of claim 9, wherein: deviation set value e of motor vehicle back-and-forth speed_sIs not more than 3%.