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Laser velocimeter parallelism accuracy measuring apparatus and measuring method thereof

A laser velocimeter and accurate measurement technology, applied in the direction of measuring device, mechanical measuring device, using mechanical device, etc., can solve the problems of large measurement influence, high measurement accuracy, large error, etc., to achieve easy-to-understand principle and measurement accuracy High, simple structure

Active Publication Date: 2012-01-18
WUHAN WUDA ZOYON SCI & TECH
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Problems solved by technology

One is to achieve by interference method, the measured beam is divided into two beams of light, and then interference occurs at an appropriate position, if the incident beam is parallel light, the resulting interference fringes are straight fringes or no fringes, this method is accurate High accuracy, expensive interferometer, large interference volume, inconvenient to use, vibration has a great impact on measurement, and the angle range that can be measured is small
The other is to use the most primitive tape measure method to measure the distance between different distant lasers to verify, but this method has low precision and large errors caused by human eyes

Method used

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  • Laser velocimeter parallelism accuracy measuring apparatus and measuring method thereof
  • Laser velocimeter parallelism accuracy measuring apparatus and measuring method thereof
  • Laser velocimeter parallelism accuracy measuring apparatus and measuring method thereof

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Embodiment Construction

[0025] Such as figure 1 As shown, the carrying platform S8 is a 4000*600*200mm cuboid frame made of steel material, with adjustment screws on the cuboid frame, and the four laser speedometers are the first laser speedometer S1 and the second laser speedometer respectively. The instrument S2, the third laser velocimeter S3, and the fourth laser velocimeter S4 are installed in parallel on the cuboid frame, and each laser velocimeter probe can be fine-tuned in the X and Y directions by adjusting the screw to keep it in the same direction as the vertical direction. The side angle is not more than 5°, for example, 2°, the adjustment accuracy can reach 0.1mm, and the adjustable range is 50mm. The distance between the farthest laser velocimeters S1 and S4 is 3500mm. The first laser velocimeter S1, the second laser velocimeter S2, the third laser velocimeter S3, and the fourth laser velocimeter S4 are respectively connected to the data acquisition card installed on the processor 7 th...

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Abstract

The invention relates to a laser velocimeter parallelism accuracy measuring apparatus and a measuring method thereof. The apparatus comprises a load-bearing platform, a mobile platform, a laser rangefinder, a data collection card, a processor, and a displayer. At least two laser velocimeters are installed in parallel on the load-bearing platform. The mobile platform is positioned under the load-bearing platform, and is installed on a pedestal through a horizontal slide mechanism. The laser rangefinder is installed at a side outside the mobile platform. The data collection card connects with a plurality of laser velocimeters, the laser rangefinder and the processor. A calculation result of the processor is outputted to the displayer. According to the method, a parallelism verification principle of high precision laser velocity measurement is utilized to calculate difference of angle values between the laser velocimeters, and measuring precision of angle difference is 0.005 degree. The apparatus has the characteristics of simple structure, an easy-to-understand principle and high measuring precision. The apparatus can be used without professional operation personnel and is worth popularization.

Description

technical field [0001] The invention relates to the technical field of parallelism testing of multiple laser beams, in particular to an accurate measurement device and method for the parallelism of multiple laser velocimeters. Background technique [0002] The laser velocimeter is mainly used to measure the subsidence speed of the road surface in the deflection measurement system. Since the vehicle speed has a large speed component in the direction of the laser speed measurement, in order to eliminate this component, the laser velocimeter measures the road surface settlement speed. Therefore, the angle between the two lasers needs to be kept at an accuracy of 0.005 degrees, so that the product of the sine value of the angle difference α between the two lasers and the vehicle speed will be controlled within 1mm / s, which greatly reduces the Therefore, the importance of calibrating the parallelism of the laser velocimeter is particularly prominent. [0003] At present, there a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/252
Inventor 李清泉曹民毛庆洲张德津章丽萍谷伟华曾星
Owner WUHAN WUDA ZOYON SCI & TECH
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