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Method and device for detecting error of laser speedometer

A technology of a laser velocimeter and a detection method, which is applied in the testing/calibration of measuring devices, speed/acceleration/shock measuring equipment, instruments, etc., can solve the problem that the high-speed measurement performance of the laser velocimeter cannot be detected, and the synchronization error affects the effectiveness of the velocimeter. , high road requirements

Inactive Publication Date: 2008-08-27
BEIJING CHANGCHENG METERING TEST TECH INST NO 1 GRP CO CHINA AVIATION IND
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Problems solved by technology

This method requires actual measurement on the road, which not only has high requirements on the road, but also cannot detect the high-speed measurement performance of the laser speedometer due to the limitation of the actual vehicle speed.
At the same time, this method requires that the measurement of the detection device and the measurement of the speedometer should be strictly synchronized, so a large synchronization error will affect the effectiveness of the speedometer detection

Method used

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  • Method and device for detecting error of laser speedometer
  • Method and device for detecting error of laser speedometer
  • Method and device for detecting error of laser speedometer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] Detect the speed measurement results of the laser speedometer for vehicles traveling at 66km / h at a distance of 100 meters from the laser speedometer.

[0021] 1. Laser velocimeter 1 adopts ComLaserCL-1p from UNIMO Technology Company in Korea.

[0022] 2. The response band of the photoelectric converter 2 is consistent with the band of the detected laser velocimeter 1, and the photoelectric conversion time is on the order of nanoseconds.

[0023] 3. The wavelength band of the laser pulse emitted by the echo simulator 5 is consistent with the wavelength band of the detected laser speedometer 1, and the laser pulse has a rising edge on the order of nanoseconds.

[0024] 4. Pulse delay generator 4 delays 667 nanoseconds.

[0025] 5. The moving target generator 3 adopts the AWG7102 arbitrary waveform generator of TEK Company.

[0026] First by computer 6 by the communication interface of moving target generator 3, control moving target generator 3 produces a series of dig...

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Abstract

The invention belongs to the photoelectric detection technology, relating to a detection method for measuring speed errors of a laser velocimeter and a detection device thereof, wherein the invention uses the time difference(t) to be multiplied by the light velocity to represent the distance; as for the laser velocimeter sending measuring impulses at a fixed cycle, the continuously changing distance is of a diffuse reflection echo wave of a moving object, and the velocity value of the moving object is obtained by the laser velocimeter receiving the echo wave; the standard laser velocity value can be freely set and is constantly unchanged during a measuring process of the velocimeter, thereby ensuring the quality of speed measurement. The method can freely set the distance of the moving object and imitate speeds of the object in different distances; if the time difference (t) evenly increases or decreases, a moving object which moves away or moves closer in an uniform velocity is created.

Description

technical field [0001] The invention belongs to the photoelectric detection technology, and relates to a detection method and a detection device for the speed measurement error of the laser speed measurement instrument. Background technique [0002] For the detection of laser speedometers in my country, the speed sensor is mainly installed on the wheel hub of the detection vehicle. When the detection vehicle is running at a certain speed at a constant speed, the speed measurement sensor can display the vehicle speed in real time. At the same time, the laser speedometer measures the speed of the detection vehicle. The displayed value of the speedometer is compared with the speed value of the detection vehicle to obtain the speed measurement error of the speedometer. However, this method has high requirements on the detection vehicle, site and weather, and it is easy to cause large errors when the above conditions are not met, so it is not easy to popularize. In addition, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P21/02
Inventor 崔岩梅李涛师会生冷杰夏树林张富根刘春梅
Owner BEIJING CHANGCHENG METERING TEST TECH INST NO 1 GRP CO CHINA AVIATION IND
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