CN218567401U - On-site checking device for motor vehicle overspeed monitoring equipment - Google Patents
On-site checking device for motor vehicle overspeed monitoring equipment Download PDFInfo
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- CN218567401U CN218567401U CN202220227386.XU CN202220227386U CN218567401U CN 218567401 U CN218567401 U CN 218567401U CN 202220227386 U CN202220227386 U CN 202220227386U CN 218567401 U CN218567401 U CN 218567401U
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Abstract
The utility model belongs to motor vehicle overspeed monitoring facilities metrological verification/calibration field discloses a motor vehicle overspeed monitoring facilities field inspection school device. The device comprises a sensor unit, a signal processing unit, a power supply unit, a display unit and a PC unit; the power supply unit is respectively connected with the sensor unit, the signal processing unit and the display unit, and the sensor unit, the signal processing unit and the display unit are sequentially connected; the signal processing unit is connected with the PC unit; the field calibration device for the motor vehicle overspeed monitoring equipment can meet the calibration and calibration of field speed measurement errors of speed measurement equipment based on four speed measurement principles of radar, a ground induction coil, an interval and video, and can also detect the running distance of an automobile, the running time interval, the moment equidistant distance of the automobile passing through a bayonet and time parameters.
Description
Technical Field
The utility model belongs to motor vehicle overspeed monitoring facilities metrological verification/calibration field, the utility model relates to a motor vehicle overspeed monitoring facilities field inspection device.
Background
The motor vehicle overspeed monitoring equipment is a metering device used for monitoring the running state of a motor vehicle by a traffic management department and large enterprises and public institutions, a forced inspection metering device catalog issued in 2019 by China lists the forced inspection metering device in safety protection forced inspection metering devices, and key management is implemented in China. In order to ensure the accuracy and reliability of the speed measurement of the motor vehicle speed measuring instrument (or system), all regions pay great attention to the problem of the traceability of the quantity value of the motor vehicle speed measuring instrument, the motor vehicle speed measuring instrument needs to be periodically verified by a legal metering technical mechanism every year according to the management method of China for forcibly detecting metering instruments, and the motor vehicle speed measuring instrument can be used if the verification is qualified.
At present, measurement technical regulations relating to motor vehicle velocimeters published in China comprise four verification regulations, namely JJG527-2015, JJG528-2015, JJJG 1122-2015 and JJG1074-2012, which correspond to a fixed motor vehicle radar velocimeter, a movable motor vehicle radar velocimeter, a motor vehicle ground sensing coil velocimeter and a motor vehicle laser velocimeter respectively. In the four regulations, the field speed measurement error is required to be calibrated, so that a set of metering standard device which can simultaneously meet four speed measurement principles and can complete calibration on the field is required.
For a motor vehicle interval speed measurement system and a motor vehicle video speed measurement system, relevant metering technical specifications do not exist in China at present. However, the field speed measurement error is the most important metering characteristic of the speed measurement equipment of the motor vehicle, and the field speed measurement errors of the interval speed measurement system and the video speed measurement system also need to be regularly calibrated.
According to the speed measurement principle, the interval speed measurement system and the video speed measurement system are used for measuring the speed, namely the average speed in a certain distance, so that the speed measurement error needs to be measured, parameters such as the interval distance, the driving time interval and the time when a vehicle passes through a bayonet are firstly calibrated, and the existing calibration devices for detecting the radar and the ground sensing coil at home and abroad do not have the function of simultaneously detecting the distance, the time interval and the time, and cannot meet the detection requirements of the motor vehicle interval and the video speed measurement system.
Disclosure of Invention
In order to solve the above problems existing in the prior art, the utility model provides a can satisfy the on-the-spot verification and calibration of the error that tests the speed of the speed measuring equipment of four kinds of principles that test the speed of radar, induction coil, interval and video, still can detect vehicle driving distance, driving time interval, vehicle simultaneously and pass through the motor vehicle hypervelocity monitoring facilities on-the-spot school device that examines of bayonet socket constantly equidistance and time parameter.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a field calibration device for an overspeed monitoring device of a motor vehicle comprises a sensor unit, a signal processing unit, a power supply unit, a display unit and a PC unit; the power supply unit is respectively connected with the sensor unit, the signal processing unit and the display unit, and the sensor unit, the signal processing unit and the display unit are sequentially connected; the signal processing unit is connected with the PC unit;
the sensor unit comprises a photoelectric sensor and a GPS/Beidou dual-mode antenna, wherein the photoelectric sensor comprises a grating measuring sensor and a photoelectric sensor mounting bracket; the grating measuring sensor is fixed on the photoelectric sensor mounting bracket, and the GPS/Beidou dual-mode antenna is an external antenna which can be used for receiving GPS and Beidou positioning time service signals simultaneously. The sensor unit acquires relevant information such as vehicle running speed, time, distance, current time, current date and the like through the photoelectric sensor and the GPS/Beidou dual-mode receiver, and displays the information on the display unit in a wireless mode.
The signal processing unit comprises an acquisition processing module, a crystal oscillation module, a positioning time service module, a language transceiving module A, an analysis calculation module and a wireless transmitting module. The acquisition processing module, the crystal oscillation module and the positioning time service module are respectively connected with the analysis and calculation module, the analysis and calculation module is connected with the wireless transmitting module, and the language transceiving module A is connected with the wireless transmitting module; the positioning time service module is connected with the crystal oscillation module;
the photoelectric sensor is connected with the acquisition processing module, and the GPS/Beidou dual-mode antenna is connected with the positioning time service module;
the power supply unit is a vehicle-mounted 12V storage battery or a mobile power supply, and provides working power for the sensor unit, the signal processing unit and the display unit through the vehicle-mounted 12V storage battery or the mobile power supply.
The display unit comprises an external display screen, an internal display screen and a remote display screen, and synchronously displays the information of the instantaneous speed, the running distance, the running time, the current date, the standard Beijing time and the like of the vehicle.
The PC unit is an ordinary computer.
Furthermore, the photoelectric sensor mounting bracket is fixed on the outer side of the door of the test vehicle in a sucking disc or magnet mode, or the photoelectric sensor mounting bracket is fixed on the outer side of the vehicle at other positions approximately vertical to the ground; the sucker or the magnet is connected with the photoelectric sensor mounting bracket through a connecting piece and a universal joint;
furthermore, the grating measuring sensor is fixed on the mounting bracket through a screw hole and a screw, so that the grating measuring sensor is perpendicular to the ground and keeps a distance of 150-300 mm;
furthermore, the GPS/Beidou dual-mode antenna is a vehicle-mounted sucker type small external antenna, and the frequency is 2.4GHz;
furthermore, the acquisition processing module acquires and processes the output information of the grating sensor and provides distance information for the device; the crystal oscillation module is a crystal oscillator and a frequency division and mixing circuit and provides a unified time sequence signal for the device; the crystal oscillator comprises a Raynaud crystal oscillator with the frequency of 10MHz;
furthermore, the positioning time service module is a GPS and Beidou dual-mode receiver, the position of the positioning time service module can be accurately positioned by acquiring satellite information, standard time can be accurately transmitted, and frequency signals provided by the crystal oscillation module can be corrected and corrected;
furthermore, the language transceiving module A is used for a driver to carry out voice communication with personnel at a remote display screen in a wireless transmission mode;
furthermore, the analysis and calculation module analyzes and calculates the information of the vehicle such as instantaneous speed, driving distance, driving time, current date, beijing time and the like by integrating the distance information provided by the acquisition and processing module, the frequency and time sequence information provided by the crystal oscillation circuit and the position and time information provided by the positioning time service module;
furthermore, a high-performance CPU is arranged in the wireless transmitting module, a standard asynchronous serial interface is adopted, data are transmitted transparently, the working frequency is 418 MHz-455 MHz, the transmission distance is not less than 1500 m, and the wireless transmitting module is used for transmitting data measured by the sensor unit and the signal processing unit to the display unit accurately in real time;
furthermore, the display screen outside the vehicle comprises a wireless receiving module A and a display module A, and the whole display screen is fixed on the top of the vehicle or in front of the vehicle through a display screen mounting bracket outside the vehicle, so that the motor vehicle overspeed monitoring system can clearly take a snapshot; the wireless receiving module A can receive the signal sent by the wireless transmitting module in real time and display the signal on the display module A; the display module A consists of a high-brightness LED nixie tube array;
furthermore, the in-vehicle display screen comprises a wireless receiving module B and a display module B, and the whole is fixed at a position which is right in front of a driver in the vehicle and does not influence safe driving through the in-vehicle display screen mounting bracket, so that the driver can master the states of all parameters of the calibration device at any time and change the values of all the parameters by controlling the vehicle to adjust;
furthermore, the remote display screen comprises a wireless receiving module C, a display module C and a language transceiving module B, and can remotely display the vehicle running information in real time within 1500 meters away from the test vehicle; the operator can remotely and real-timely carry out voice communication with a driver driving the test vehicle.
Through with sensor unit, signal processing unit and the inside and outside display screen of car, install on test vehicle, go through motor vehicle overspeed monitoring facilities monitoring area at the uniform velocity of test vehicle, the utility model discloses can be in real time, accurate, clear measurement to in the vehicle in step, outside and remote display test vehicle instantaneous speed, driving distance, driving time, current date, and information such as standard Beijing time supply motor vehicle overspeed monitoring facilities scene snapshot, through the comparison method, realize examination, calibration and the detection to each parameter of monitoring facilities.
Compared with the prior art, the utility model beneficial effect who has is:
1. the existing field calibration device of the motor vehicle overspeed monitoring equipment can only measure the instantaneous speed or the running distance of the motor vehicle; the utility model discloses but simultaneous measurement motor vehicle instantaneous speed, driving time, driving distance, current date and current moment isoparametric realize that a set of equipment detects when to a plurality of parameters.
2. The existing field calibration device for the motor vehicle overspeed monitoring equipment can only meet the calibration of a single radar velocimeter and a ground induction coil velocimeter; the utility model can meet the calibration and detection of the motor vehicle velocimeter based on the principles of radar speed measurement, ground sensing coil speed measurement, interval speed measurement, laser speed measurement, video speed measurement, infrared sensor speed measurement and the like; the detection and calibration of a set of equipment capable of measuring speed by various principles are realized.
3. The existing field calibration device for the overspeed monitoring equipment of the motor vehicle adopts a single sensor, a photoelectric sensor or a GPS sensor for measuring the speed, and the two sensors have limitations; the photoelectric sensor is seriously influenced by the ground and weather, and if the photoelectric sensor meets the road surfaces of unevenness, water stains on the ground and the like, or meets the weather of heavy fog, rain, snow and the like, the speed and the running distance of the vehicle cannot be accurately measured; the GPS sensor is seriously influenced by space and signals, and if the GPS sensor cannot be accurately positioned and cannot accurately time in road sections such as tunnels or underground passages or at the time when satellite signals are weak, the vehicle speed cannot be measured; the utility model discloses be in the same place photoelectric and GPS big dipper dual sensor integration, effective complementary, but anytime and anywhere accurate measurement vehicle speed overcomes and receives factors such as weather, road conditions, satellite signal are weak and influence, and the practicality is wider, and the interference killing feature is stronger.
4. The utility model builds the remote voice communication system of the driver of the driving test vehicle and the operator at the remote display screen, which is convenient for the driver to communicate with the personnel at the front section of the speed measuring equipment in time, thus greatly improving the working efficiency; the hidden traffic safety hazards caused by the communication of drivers to make calls or adopting interphone and the like are reduced.
5. The utility model arranges the display screen in the front of the driver in the vehicle, so that the driver can instantly and clearly master the running state of the vehicle and control the vehicle according to the measurement requirement; the situation that an observer needs to be added in the vehicle independently to pay attention to the state of each parameter in the running process of the vehicle at any time and communicate with a driver in the prior art is avoided; the current situation that a driver needs to stare at an instrument panel to control a vehicle all the time to keep constant speed in the prior art is avoided, driving safety is ensured, and traffic accidents are avoided.
6. Compared with the prior art, the photoelectric sensor mounting bracket A provided by the utility model is additionally provided with the sensor extension plate, so that a sensor with any size can be conveniently mounted on any vehicle; the problem that in the prior art, the working distance between a photoelectric sensor and the ground cannot be met due to the fact that a chassis of a large-scale SUV vehicle is high, a pedal shields light and the like is solved; the utility model discloses can install on any vehicle, guarantee that any ground clearance's photoelectric sensor normally works.
Drawings
The invention is further described below with reference to the following figures and examples:
fig. 1 is a schematic diagram of the on-site calibration device of the overspeed monitoring apparatus of a motor vehicle of the present invention.
Fig. 2 is a schematic diagram of the sensor unit, the signal processing unit, and the power supply unit of the present invention.
Fig. 3 is a schematic diagram of the display unit according to the present invention.
FIG. 4 is a schematic view of the connection piece connecting the suction cup and the gimbal.
FIG. 5 is a schematic view of the photosensor mounting bracket after attachment to the gimbal.
Fig. 6 is a side view of a photosensor.
Fig. 7 is a schematic view of a sensor extension plate according to the present invention.
In the figure, 1, a power supply unit, 2, a sensor unit, 3, a signal processing unit, 4, a display unit, 5, a PC unit, 201, a photoelectric sensor, 202, a GPS/Beidou dual-mode antenna, 301, an acquisition processing module, 302, a positioning time service module, 303, a crystal oscillation module, 304, a voice transceiving module A,305, an analysis calculation module, 306, a wireless transmission module, 401, an exterior display screen, 402, an interior display screen, 403, a remote display screen, 4011, a wireless receiving module A,4012, a display module A,4021, a wireless receiving module B,4022, a display module B,4031, a wireless receiving module C,4032, a display module C,4033, a language transceiving module B,203, a sucker, 204, a universal joint, 205, A,206, a screw hole B,207 and a screw hole C are arranged.
Detailed Description
The present invention will be further described with reference to the drawings attached to the specification, but the present invention is not limited to the following embodiments.
Example 1
A field calibration device of an overspeed monitoring device of a motor vehicle is shown in figures 1-7 and comprises a sensor unit 2, a signal processing unit 3, a power supply unit 1, a display unit 4 and a PC unit 5; the power supply unit 1 is respectively connected with the sensor unit 2, the signal processing unit 3 and the display unit 4, and the sensor unit 2, the signal processing unit 3 and the display unit 4 are sequentially connected; the signal processing unit 3 is connected with a PC unit 5;
the sensor unit 2 comprises a photoelectric sensor 201 and a GPS/Beidou dual-mode antenna 202, wherein the photoelectric sensor 201 comprises a grating measuring sensor and a photoelectric sensor 201 mounting bracket; the grating measuring sensor is fixed on the photoelectric sensor 201 mounting bracket, and the GPS/Beidou dual-mode antenna 202 is an external antenna which can be used for receiving GPS and Beidou positioning time service signals simultaneously. The sensor unit 2 obtains the relevant information such as the vehicle running speed, time, distance, current time, current date and the like through the photoelectric sensor 201 and the GPS/Beidou dual-mode antenna 202 receiver, and displays the information on the display unit 4 in a wireless mode.
The signal processing unit 3 comprises an acquisition processing module 301, a crystal oscillation module 303, a positioning time service module 302, a language transceiving module a 304, an analysis calculation module 305 and a wireless transmitting module 306. The acquisition processing module 301, the crystal oscillation module 303 and the positioning time service module 302 are respectively connected with an analysis calculation module 305, the analysis calculation module 305 is connected with a wireless transmitting module 306, and a language transceiving module A304 is connected with the wireless transmitting module 306; the positioning time service module 302 is connected with the crystal oscillation module 303;
the photoelectric sensor 201 is connected with an acquisition processing module 301, and the GPS/Beidou dual-mode antenna 202 is connected with a positioning time service module 302;
the power supply unit 1 is a vehicle-mounted 12V storage battery or a mobile power supply, and provides a working power supply for the sensor unit 2, the signal processing unit 3 and the display unit 4 through the vehicle-mounted 12V storage battery or the mobile power supply.
The display unit 4 comprises an outside display screen 401, an inside display screen 402 and a remote display screen 403, and synchronously displays information such as the instantaneous speed, the driving distance, the driving time, the current date, the standard Beijing time and the like of the vehicle.
The PC unit 5 is a common computer and is used for storing the live photos extracted in the traffic management system.
The mounting bracket of the photoelectric sensor 201 is fixed on the outer side of the door of the test vehicle in a sucking disc 203 or magnet mode, or the mounting bracket of the photoelectric sensor 201 is fixed on other positions, approximately vertical to the ground, of the outer side of the vehicle; the sucker 203 or the magnet is connected with the mounting bracket of the photoelectric sensor 201 through a connecting piece and a universal joint 204; the photoelectric sensor 201 is fixed on the photoelectric sensor 201 mounting bracket; the photosensor 201 mounting bracket is adjusted in position by a gimbal 204. Thereby driving the photoelectric sensor 201 to adjust the position.
Furthermore, the grating measuring sensor is fixed on the mounting bracket of the photoelectric sensor 201 through a screw hole and a screw, so that the grating measuring sensor is ensured to be vertical to the ground and keep a distance of 150 mm-300 mm;
further, the GPS/beidou dual-mode antenna 202 is a vehicle-mounted sucker type small external antenna with a frequency of 2.4GHz;
further, the acquisition processing module 301 acquires and processes information output by the grating sensor to provide distance information for the device; the crystal oscillation module 303 is a crystal oscillator, and a frequency division and mixing circuit, and provides a unified timing signal for the device; the crystal oscillator comprises a Raynaud crystal oscillator with the frequency of 10MHz;
furthermore, the positioning and timing module 302 is a GPS and beidou dual-mode receiver, and can accurately position the position by acquiring satellite information, accurately transmit standard time, and correct a frequency signal provided by a crystal oscillation module;
furthermore, the language transceiver module a 304 is used for voice communication between a driver and a person at a remote display screen in a wireless transmission mode;
further, the analysis and calculation module 305 analyzes and calculates information such as the instantaneous speed, the driving distance, the driving time, the current date and beijing time of the vehicle by integrating the distance information provided by the acquisition and processing module 301, the frequency and the time sequence information provided by the crystal oscillation circuit, and the position and time information provided by the positioning and time service module 302;
furthermore, the wireless transmitting module 306 is internally provided with a high-performance CPU, adopts a standard asynchronous serial interface, transparently transmits data, has a working frequency of 418MHz to 455MHz, has a transmission distance of not less than 1500 meters, and is used for accurately transmitting the data measured by the signal processing unit 3 to the display unit 4 in real time;
further, the display screen 401 outside the vehicle comprises a wireless receiving module A4011 and a display module A4012, and the whole display screen 401 outside the vehicle is fixed on the top of the vehicle or in front of the vehicle through a mounting bracket of the display screen 401 outside the vehicle, so that the motor vehicle overspeed monitoring system can clearly snapshot; the wireless receiving module a 4011 can receive the signal sent by the wireless transmitting module 306 in real time, and display the signal on the display module a 4012; the display module A4012 consists of a high-brightness LED nixie tube array;
furthermore, the in-vehicle display screen 402 comprises a wireless receiving module B4021 and a display module B4022, and the whole is fixed at a position which is right in front of a driver in the vehicle and does not affect safe driving through the in-vehicle display screen 402 mounting bracket, so that the driver can master the states of various parameters of the calibration device at any time, and the values of the various parameters are changed by controlling the vehicle to adjust;
further, the remote display screen 403 includes a wireless receiving module C4031, a display module C4032 and a language transceiver module B4033, and can remotely display vehicle driving information in real time within 1500 meters from the test vehicle; the operator can remotely and real-timely carry out voice communication with a driver driving the test vehicle.
The device is arranged on a test vehicle, can accurately and clearly measure in real time, synchronously display the information of the instantaneous speed, the running distance, the running time, the current date, the standard Beijing time and the like of the vehicle inside, outside and remotely, and is used for the on-site snapshot of the overspeed monitoring equipment of the motor vehicle, and the verification, the calibration and the detection of all parameters of the monitoring equipment are realized through a comparison method.
The photosensor 201 is mounted. Firstly, adsorbing a mounting bracket of a photoelectric sensor 201 on the outer side of a door of a test vehicle or other outer surfaces of the vehicle, which can ensure that the photoelectric sensor 201 is vertical to the ground, through a sucking disc 203, and extruding air in the sucking disc 203 to firmly adsorb the mounting bracket of the photoelectric sensor 201 on the vehicle through a connecting piece and a universal joint 204; the photoelectric sensor 201 is provided with a plurality of screw holes A205; a plurality of screw holes B206 are formed on the mounting bracket of the photoelectric sensor 201; and can be provided with a sensor extension plate according to specific requirements; a plurality of screw holes C207 are arranged on the sensor extension plate; aligning a screw hole A205 on the photoelectric sensor 201 with a screw hole B206 on a mounting bracket of the photoelectric sensor 201 and a screw hole C207 of a sensor extension plate, aligning other screw holes in sequence, and installing a bolt and a nut to be screwed; adjusting the universal joint 204 to enable the light source of the photoelectric sensor 201 to vertically irradiate the ground, and fixing the universal joint 204; up to this point, the mounting of the photosensor 201 is completed. The screw hole C207 is selected according to the vertical distance between the photoelectric sensor 201 and the ground, so as to ensure that the vertical distance meets the speed and distance measurement requirements of the photoelectric sensor 201, and is generally less than 300 mm.
A GPS/beidou dual-mode antenna 202 is installed. The GPS/Beidou dual-mode antenna 202 is adsorbed on the roof of the test vehicle or other positions outside the test vehicle, so that firm installation is ensured, and satellite signals can be received; the antenna output end is connected with the antenna interface of the signal processing unit 3.
And installing a display screen. The display screen 401 outside the vehicle is arranged on the roof of the test vehicle or the number plate of the front and rear vehicles through a bracket or a sucker or other modes, or can be grabbed by the motor vehicle overspeed monitoring system at other positions of the vehicle clearly; the in-vehicle display screen 402 is arranged at a position where a driver can conveniently see at any time in a sucking disc or bracket mode, and the normal driving of the driver is not influenced; the remote display screen 403 is carried by ground personnel and is typically located at the ground installation location of the vehicle overspeed monitoring system.
The signal processing unit 3 is mounted. The signal processing unit 3 is arranged in the test car, the normal driving position of a driver is not influenced, the driver can conveniently listen to the language information of the language transceiver module A304 normally, the signal processing unit must be firmly arranged, and an instrument heat dissipation opening cannot be shielded.
The power supply unit 1 is connected. The power supply unit 1 generally supplies power for direct current 12V, can be obtained through a test vehicle battery, and can also be provided by a portable mobile power supply; the power supply unit 1 supplies power to the photoelectric sensor 201 and the signal processing unit 3, as well as the display screen 401 outside the vehicle, the display screen 402 inside the vehicle, and the like.
And (5) a detection process. And starting a power supply, waiting for the time service module to obtain the current Beijing time, starting the vehicle after stably displaying, enabling the test vehicle to pass through the area monitored by the detected motor vehicle overspeed monitoring system at a constant speed, testing and recording the running state of the test vehicle by the monitoring system, and finishing detection.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (5)
1. A field calibration device for an overspeed monitoring device of a motor vehicle is characterized by comprising a sensor unit (2), a signal processing unit (3), a power supply unit (1), a display unit (4) and a PC unit (5); the power supply unit (1) is respectively connected with the sensor unit (2), the signal processing unit (3) and the display unit (4), and the sensor unit (2), the signal processing unit (3) and the display unit (4) are sequentially connected; the signal processing unit (3) is connected with the PC unit (5);
the sensor unit (2) comprises a photoelectric sensor (201) and a GPS/Beidou dual-mode antenna (202), wherein the photoelectric sensor (201) comprises a grating measuring sensor and a photoelectric sensor (201) mounting bracket; the grating measuring sensor is fixed on a mounting bracket of the photoelectric sensor (201);
the signal processing unit (3) comprises an acquisition processing module (301), a crystal oscillation module (303), a positioning time service module (302), a language transceiving module A (304), an analysis calculation module (305) and a wireless transmitting module (306); the acquisition processing module (301), the crystal oscillation module (303) and the positioning time service module (302) are respectively connected with the analysis and calculation module (305), the analysis and calculation module (305) is connected with the wireless transmitting module (306), and the language transceiving module A (304) is connected with the wireless transmitting module (306); the positioning time service module (302) is connected with the crystal oscillation module (303);
the photoelectric sensor (201) is connected with the acquisition processing module (301), and the GPS/Beidou dual-mode antenna (202) is connected with the positioning time service module (302).
2. The field calibration device of the motor vehicle overspeed monitoring equipment according to claim 1, characterized in that the power supply unit (1) is a vehicle-mounted 12V battery or a mobile power supply, and the sensor unit (2), the signal processing unit (3) and the display unit (4) are supplied with working power supply through the vehicle-mounted 12V battery or the mobile power supply.
3. The on-site calibration device for the overspeed monitoring equipment of motor vehicles as claimed in claim 2, wherein said display unit (4) comprises an off-board display screen (401), an on-board display screen (402) and a remote display screen (403).
4. The field calibration device for the motor vehicle overspeed monitoring device according to claim 3, characterized in that the mounting bracket of the photoelectric sensor (201) is fixed on the outer side of the door of the test vehicle by means of a suction cup (203) or a magnet, or the mounting bracket of the photoelectric sensor (201) is fixed on the outer side of the vehicle at another position approximately perpendicular to the ground; the sucker (203) or the magnet is connected with the mounting bracket of the photoelectric sensor (201) through a connecting piece and a universal joint (204); the photoelectric sensor (201) is fixed on the photoelectric sensor (201) mounting bracket; the photoelectric sensor (201) mounting bracket is adjusted in position through a universal joint (204).
5. The on-site calibration device for the overspeed monitoring equipment of motor vehicles according to claim 4, wherein the grating measuring sensor is fixed on the mounting bracket of the photoelectric sensor (201) through a screw hole and a screw structure, so as to ensure that the grating measuring sensor is perpendicular to the ground and keeps a distance of 150mm to 300 mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116303395A (en) * | 2023-03-08 | 2023-06-23 | 交通运输部公路科学研究所 | Online metering calibration verification method for intelligent monitoring system of highway infrastructure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116303395A (en) * | 2023-03-08 | 2023-06-23 | 交通运输部公路科学研究所 | Online metering calibration verification method for intelligent monitoring system of highway infrastructure |
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