CN201438335U - Speed measurement reference device of motor vehicle speed measuring and scene shooting system - Google Patents
Speed measurement reference device of motor vehicle speed measuring and scene shooting system Download PDFInfo
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- CN201438335U CN201438335U CN2009200801837U CN200920080183U CN201438335U CN 201438335 U CN201438335 U CN 201438335U CN 2009200801837 U CN2009200801837 U CN 2009200801837U CN 200920080183 U CN200920080183 U CN 200920080183U CN 201438335 U CN201438335 U CN 201438335U
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Abstract
The utility model discloses a speed measurement reference device of a motor vehicle speed measuring and scene shooting system, which consists of a GPS receiving antenna, a GPS receiving and processing module, a signal processing module, a keyboard/display module, a remote control keyboard, an on-vehicle display window, a singlechip, an high-brightness display screen which is hung outside and a printer. The speed measurement reference device is arranged in the vehicle, the GPS antenna is installed at the roof of the vehicle, and the high-brightness display screen is hung at the head or tail of the vehicle. During the running of the vehicle, the GPS antenna receives satellite signals, then the signals are processed by an information processing circuit at real time to get the parameters of speed, mileage, time and the like of the vehicle, and the high-brightness display screen hung outside displays the real-time running speed of the vehicle clearly. When the vehicle under detection running with a speed exceeding the limit speed passes through the motor vehicle speed measuring and scene shooting system, the system shoots the vehicle to get evidence and to get the running speed value of the vehicle. The reference speed valve of the detected vehicle displayed on the high-brightness display screen hung outside is also shot at the same time. The manager of the motor vehicle speed measuring and scene shooting system can get the error between the two speed values only by comparing the two speed valves so as to detect/adjust the speed measuring and scene shooting system.
Description
Technical field
The utility model relates to a kind of examination criteria device, particularly a kind of automobile overspeed with overspeed shooting function is monitored the device that evidence-obtaining system is examined and determine and calibrated automatically.
Background technology
At present, domestic measuring principle to the motor vehicle monitoring system mostly is greatly that radar velocity measurement, ground induction coil test the speed, laser velocimeter and video etc., is aided with the monitoring system that suitable Taking Pictures recording transmission system has just constituted various principles again.Usually use special-purpose calibrating installation to examine and determine at the monitoring system of different measuring principles.But all there is certain problem in they when verification test.The Doppler's principle that the radar velocity measurement principle adopts, it requires high to the angle of test, when the angle of test obviously influences the accuracy of measurement result during greater than 5 °, and when adjacent lane two cars enter the hypervelocity monitored area side by side or enter hypervelocity continuously during the monitored area with track two cars, which rule-breaking vehicle is radar observation system can't clearly assert, is easy to cause mistake to grab erroneous judgement.What ground induction coil tested the speed employing is electromagnetic induction principle, generally will use two coils and test the speed, and the zone is the hypervelocity monitored area between two coils.But be interfered easily, measurement result accuracy is not high, when measured car did not also leave second coil, second coil was subjected to ectocine and is triggered, and the measurement speed of a motor vehicle that obtains is bigger than normal than the speed of a motor vehicle of essence, can destroy the road surface during installation, influence pavement life, and coil also is subjected to damages such as heavy vehicle extruding, road surface repairing underground easily affected by environment and alteration of form takes place, using just needed more emat coil in 2～3 years, and actual maintenance expense is higher than other equipment that tests the speed.The same with the Principles of Radar monitoring system, also to consider the influence that setting angle brings during design, with respect to other two kinds of measuring principles, the accuracy that tests the speed is higher, but tests the speed product price also than higher.
Summary of the invention
For the speed measuring device that the overcomes domestic existing detection system accuracy that tests the speed not high, easy mistake is grabbed the deficiency of erroneous judgement during to adjacent vehicle speed measuring, the purpose of this utility model provides a kind of highway speed measuring and monitoring evidence-obtaining system speed and detects and calibrating installation, with accuracy and the rate accuracy that guarantees that highway speed measuring and monitoring system tests the speed.
The utility model is that a kind of motor vehicle tests the speed and takes evidence-obtaining system speed examination criteria device, by the GPS receiving antenna, the GPS receiving processing module, signal processing module, keypad/display module, remote keypad, display window on the machine, single-chip microcomputer, plug-in highlighted display screen and printer constitute, the signal output part of GPS receiving processing module is connected with the signal processing module signal input part, the signal output part of signal processing module is connected with the single-chip data input end, the single-chip data output terminal connects plug-in highlighted display screen and printer respectively, the keypad/display module input end is connected with keyboard, and output terminal connects display window on single-chip microcomputer and the machine respectively.
In actual use, be that this device is placed in the automobile, gps antenna is installed in roof, plug-in high intensity display screen is suspended on the headstock or the tailstock.This device receives satellite-signal by gps antenna in on-board running after, by GPS receiving processing module, signal processing module and single-chip microcomputer in the device detection signal is handled the parameters such as speed, mileage and Beijing time that the back obtains this automobilism in real time, and directly by the real-time speed of a motor vehicle of the clear demonstration of plug-in high intensity display screen.When this inspection vehicle hypervelocity tested the speed the monitoring evidence-obtaining system by highway, motor vehicle tested the speed and takes evidence-obtaining system to this inspection vehicle automatic shooting evidence obtaining, and obtained the velocity amplitude of this car.Inspection vehicle self standard speed value on the plug-in highlighted display screen also is taken in the lump.Motor vehicle tests the speed and takes the evidence-obtaining system managerial personnel and only needs two velocity amplitudes are compared, and can obtain the detection error of this evidence-obtaining system to motor vehicle speed, revise in view of the above, thus detection/calibration that realization is tested the speed and taken evidence-obtaining system motor vehicle.The measuring principle that the utility model utilization is new, the high precision motor vehicle that is developed into tests the speed and takes evidence-obtaining system speed examination criteria device and can be used for the motor vehicle velocity-measuring system (radar velocity measurement system, ground induction coil velocity-measuring system, laser velocimeter system etc.) that is installed on the highway is carried out on-the-spot proving ground test, the accuracy of comprehensive detection/calibration speed value, also can be used for measurement, and be applied to all kinds of online real vehicle calibratings with monitoring system of camera function to speed to the motor-driven vehicle going mileage.It is installed in carries out proving ground test on the automobile and detect very convenient.Install and use very simple, convenience and quick, only need magnetic GPS receiving antenna is adsorbed on roof, plug-in high intensity display screen is suspended on the headstock or the tailstock, main frame places in the car and gets final product.
The beneficial effects of the utility model are: it has been started and a kind of motor vehicle is tested the speed and takes evidence-obtaining system rate accuracy calibrating mode, and a kind of relevant detection/calibrating installation is provided.Its accuracy of detection height, simple to operate, test specification is wide, good reproducibility, is widely used in the detection/calibration to highway speed measuring and monitoring evidence-obtaining system of metering mechanism, vehicle supervision department and other relevant departments.
Description of drawings
Fig. 1 is the utility model circuit structure block diagram.
Fig. 2 is the circuit diagram of the utility model device main modular.
Fig. 3 is that the utility model detects synoptic diagram in real time.
Embodiment
Embodiment 1
As shown in Figure 1, the utility model is by the GPS receiving antenna, the GPS receiving processing module, signal processing module, keypad/display module, remote keypad, display window on the machine, single-chip microcomputer, plug-in highlighted display screen and printer constitute, the signal output part of GPS receiving processing module is connected with the signal processing module signal input part, the signal output part of signal processing module is connected with the single-chip data input end, the single-chip data output terminal connects plug-in highlighted display screen and printer respectively, the keypad/display module input end is connected with keyboard, and output terminal connects display window on single-chip microcomputer and the machine respectively.
Fig. 2 is the circuit diagram of the utility model device main modular.The utility model adopts the external car antenna to accept the gps satellite radiofrequency signal.The GPS receiving processing module belongs to the customer equipment part in the gps system, and it receives as " radio ", the broadcasting C/A coded signal of demodulation of satellite.The GPS receiving processing module mainly is made up of radio-frequency front-end, correlator.It is the basis that the utility model is handled, and the quality of its signal Processing directly influences the performance of this utility model test; Correlator is mainly finished the tracking and the locking of signal, comprises the output of various raw data and measurement data.
GARMIN GPS25 is a subminiature radio-frequency front-end device, comprises compositor on the sheet, frequency mixer, automatic gain control (AGC) and the quantizer that symbol and the output of magnitude numeral are provided.The 4th pin TXD1 is the first asynchronous serial data delivery outlet, and what its was exported is faint millivolt stages of digital pulse signal, and delivery outlet connects socket 2 pin of signal processing module.The 5th pin RXD1 is the first asynchronous serial data input port, and the input serial gps signal of checking the mark connects gps antenna.Utilize GARMIN GPS25 chip that the GPS radiofrequency signal is carried out frequency conversion, A/D conversion and sampling, obtain the RF front end data of gps signal, and carry out signal Processing, with centre frequency is that the GPS L1 carrier frequency of 1575.42MHz is reduced to 4.309MHz, and with the sample frequency of 5.714MHz intermediate-freuqncy signal is sampled.The faint millivolt stages of digital pulse signal of output inserts signal processing module through socket 2 pin.
Signal processing module is made of amplifier TLC2252, comparer LM339, Schmidt trigger 74HCI4 and peripheral circuit, undesired signal in two filter capacitor C10, the C11 elimination output signal, then after the TLC2252 operational amplifier amplifies, the pulse signal that obtains amplifying, insert the in-phase end of LM339 comparer then, the square-wave signal of output 5V, then after handling, the shaping of 74HC14 Schmidt trigger obtains the precipitous stable 5V square wave in edge, deliver to AT89C52 single-chip microcomputer 12 pin at last, carry out calculation process by single-chip microcomputer, obtain corresponding speed and mileage value.
The remote keypad button has and resets, clock, measurement, switching, zero clearing, adopts and count, stop, checking and print button.When these functions of needs, press corresponding key respectively.Wherein switch key is to carry out the switching that speed and mileage are measured, and checks that key can inquire about the data value of storage.
In non-measurement and check under the state that by printing key, single-chip microcomputer prints order printer the speed and the mileage value of storage.
Fig. 3 is that the utility model proving ground test detects synoptic diagram.
The utility model device is installed in carries out proving ground test on the automobile and detect, install and use very simple, convenient and quick.As shown in the figure, only need magnetic GPS receiving antenna is adsorbed on roof, plug-in high intensity display screen is suspended on the tailstock, main frame places in the car and gets final product.Behind the gps antenna receiving satellite signal, the parameters such as speed, mileage and Beijing time that the treatment circuit in the main frame is handled in real time and display automobile moves.When the inspection vehicle hypervelocity tested the speed by motor vehicle and takes evidence-obtaining system, evidence-obtaining system automatically snapped inspection vehicle, and obtained the velocity amplitude of this car.Inspection vehicle on the plug-in display screen self standard speed value also is taken in the lump.The evidence-obtaining system managerial personnel only need two velocity amplitudes are compared, and can obtain test the speed error between evidence-obtaining system and the speed examination criteria of on-highway motor vehicle, and in time revise, thereby realization is to the test the speed detection/calibration of evidence-obtaining system of on-highway motor vehicle.
Special high intensity display screen is hung on the tailstock outward, is the influence of considering weather condition, and under strong sunshine, common charactron data presented is difficult to identification in the photo of taking.For this reason, designed special-purpose highlighted LED light emitting diode (LED) display screen here, guarantee under the situation at strong sunshine, also can make the data in taking a picture high-visible.
This calibrating installation is applicable to that various automobile overspeeds with overspeed shooting function monitor the calibrating and the calibration of evidence-obtaining system automatically.
Technical performance index of the present utility model:
1, show: highlighted LED of double window mouth and plug-in large scale LED show;
2, metering system: gps satellite signal, the Doppler shift conversion is tested the speed;
3, velocity survey scope: 0km/h ~ 300km/h;
4, velocity survey precision: ± 0.5%;
5, mileage measurement range: 0m ~ 9999.9m;
6, mileage measuring accuracy: ± 0.1%;
7, supply voltage: AC 220V ± 22V, 50Hz;
8, normal operation circumstances condition: temperature: 0 ℃ ~ 40 ℃; Humidity: be not more than 85%; Effectively the satellite received quantity is no less than 4.
Claims (1)
1. motor vehicle tests the speed and takes evidence-obtaining system speed examination criteria device, it is characterized in that receiving antenna by GPS, the GPS receiving processing module, signal processing module, keypad/display module, remote keypad, display window on the machine, single-chip microcomputer, plug-in highlighted display screen and printer constitute, the signal output part of GPS receiving processing module is connected with the signal processing module signal input part, the signal output part of signal processing module is connected with the single-chip data input end, the single-chip data output terminal connects plug-in highlighted display screen and printer respectively, the keypad/display module input end is connected with keyboard, and output terminal connects display window on single-chip microcomputer and the machine respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200801837U CN201438335U (en) | 2009-04-14 | 2009-04-14 | Speed measurement reference device of motor vehicle speed measuring and scene shooting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200801837U CN201438335U (en) | 2009-04-14 | 2009-04-14 | Speed measurement reference device of motor vehicle speed measuring and scene shooting system |
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| Publication Number | Publication Date |
|---|---|
| CN201438335U true CN201438335U (en) | 2010-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200801837U Expired - Fee Related CN201438335U (en) | 2009-04-14 | 2009-04-14 | Speed measurement reference device of motor vehicle speed measuring and scene shooting system |
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| CN (1) | CN201438335U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852752A (en) * | 2014-03-14 | 2014-06-11 | 北京川速微波科技有限公司 | Device and method for debugging speed measuring radar |
| CN105137124A (en) * | 2015-06-16 | 2015-12-09 | 辽宁省计量科学研究院 | High-precision highway speedometer calibration device |
| CN108205071A (en) * | 2017-12-27 | 2018-06-26 | 南宁光波科技有限公司 | Vehicle-mounted speed calibrator based on GPS high-precision positioning |
| KR101968983B1 (en) * | 2017-12-28 | 2019-08-13 | 도로교통공단 | Speed detection using OBD for vehicle and checking system for automatic vehicle-detecting device therewith |
-
2009
- 2009-04-14 CN CN2009200801837U patent/CN201438335U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852752A (en) * | 2014-03-14 | 2014-06-11 | 北京川速微波科技有限公司 | Device and method for debugging speed measuring radar |
| CN105137124A (en) * | 2015-06-16 | 2015-12-09 | 辽宁省计量科学研究院 | High-precision highway speedometer calibration device |
| CN108205071A (en) * | 2017-12-27 | 2018-06-26 | 南宁光波科技有限公司 | Vehicle-mounted speed calibrator based on GPS high-precision positioning |
| KR101968983B1 (en) * | 2017-12-28 | 2019-08-13 | 도로교통공단 | Speed detection using OBD for vehicle and checking system for automatic vehicle-detecting device therewith |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100414 Termination date: 20110414 |