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Apparatus and method for measuring speed of mobile

A technology of moving objects and moving speed, which is applied in the direction of measuring devices, devices using optical methods, electromagnetic wave re-radiation, etc., can solve the problems of low measurement accuracy and achieve the effect of insensitive measurement accuracy and accurate speed measurement

Inactive Publication Date: 2008-09-03
BEIHANG UNIV
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Problems solved by technology

[0011] The purpose of the embodiments of the present invention is to provide a device and method for measuring the speed of moving objects, so as to solve the problem of low measurement accuracy in the prior art solutions due to the bumps and sway of the vehicle or complex terrain.

Method used

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  • Apparatus and method for measuring speed of mobile
  • Apparatus and method for measuring speed of mobile
  • Apparatus and method for measuring speed of mobile

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Embodiment Construction

[0028] In the embodiment of the present invention, the first laser beam and the second laser beam are respectively emitted from the moving object to the ground from different directions, and the scattered return light of the first laser beam and the second laser beam returned from the ground are received of scattered light. Calculate the Doppler frequency difference between the scattered return light of the first laser beam and the scattered return light of the second laser beam, and obtain the moving speed of the moving object according to the Doppler frequency difference.

[0029] The structural diagram of the device for measuring the speed of moving objects described in the embodiment of the present invention is as follows figure 2 As shown, the following modules are included:

[0030] The laser beam processing module is used to emit the first laser beam and the second laser beam from the moving object to the ground from different directions, and receive the scattered ret...

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Abstract

The invention provides a device and method for measuring speed of running objects. The device main comprises: laser beam processing module for respectively transmitting a first laser beam and second laser beam from running objects of different direction to ground and receiving the scattering return light of the first laser beam returned from the ground and scattering return light of the second laser beam; computation processing module for calculating the doppler frequency difference of the scattering return light of the first laser beam and scattering return light of the second laser beam; obtaining the running speed of the objects based on the doppler frequency difference. The speed of the objects can be accurately measured and the accuracy of measurement is not sensitive to the sway and bump of running objects.

Description

technical field [0001] The invention relates to the field of optical and electronic applications, in particular to a device and method for measuring the speed of a moving object. Background technique [0002] It is very important to measure the speed of moving objects, especially for moving vehicles. In order to ensure safe driving, the driver needs to obtain accurate information about the running speed of the vehicle in time. [0003] The first method of measuring the speed of a moving vehicle in the prior art is to install an instrument on the vehicle to measure the rotational speed of the axle, and convert the rotational speed of the axle into a speed value according to the diameter of the wheel and display it. The structure of this speed measuring instrument is relatively simple. [0004] The disadvantage of the first method for measuring the speed of a moving vehicle in the above-mentioned prior art is that when the ideal rolling friction state does not appear between ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/58G01P3/36
Inventor 张春熹欧攀王纪强马宗峰冯迪胡妹玲
Owner BEIHANG UNIV
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