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Laser radar-based vehicle length measurement method

A technology of laser radar and vehicle length, applied in measurement devices, radio wave measurement systems, electromagnetic wave re-radiation and other directions, can solve the problems of inability to meet driving requirements, manual detection, vehicle aging and wear, etc., and achieve good practical value and promotion prospects. , The effect of reducing the number of re-inspections and reducing the measurement error

Inactive Publication Date: 2019-04-02
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0004] 1) In the actual measurement, it is often impossible to meet the above driving requirements due to various objective and human reasons such as aging and wear of the vehicle during use, and the inspector is not familiar with the driving operation of the vehicle under inspection.
As a result, the vehicle profile length parameters need to be re-inspected or even manually inspected
It not only reduces the detection efficiency, but also wastes the time of car owners and detection personnel
[0005] 2) The site where the vehicle outline is detected is often in the open air or in a semi-enclosed environment. The light curtain is affected by weather and other reasons, and the equipment failure rate is high, and the damage rate is also high

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  • Laser radar-based vehicle length measurement method
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  • Laser radar-based vehicle length measurement method

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Embodiment Construction

[0026] The implementation of a laser radar-based vehicle length measurement method of the present invention will be described below in combination with specific examples.

[0027] A method for measuring vehicle length based on laser radar, specifically comprising the steps of:

[0028] Step 1: Obtain the left and right radar point cloud data frames corresponding to each moment, and record the left and right radar point cloud data at time t as LP t ={(x i ,y i )|i=0,1,...,d-1}, RP t ={(x i ,y i )|i=0,1,…,m-1}, where, (x i ,y i ) represents the coordinate points in the point cloud data, d represents the number of coordinate points contained in the left radar data frame at time t, and m represents the number of coordinate points contained in the right radar data frame at time t;

[0029] Step 2: Starting from the initial frame, analyze the left and right radar point cloud data frame by frame according to the method of judging the initial / end frame of the vehicle, find the ...

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Abstract

The invention discloses a laser radar-based vehicle length measurement method. When the method is used for calculating external contour lengths of vehicles, the detected vehicles do not need to keep constant-speed running, and no deliberate requirements are brought to the running speed, so that the environment adaptability and reliability are high, the vehicle length measurement errors can be greatly decreased, and the recheck frequency can be decreased, thereby shortening the vehicle detection time, lightening the workload of the detectors and improving the detection efficiency.

Description

[0001] The invention relates to the field of automatic detection of vehicle outlines, in particular to a method for measuring vehicle length based on laser radar. Background technique [0002] At present, most of the detection stations adopt the system of automatic measurement of vehicle outline based on light curtain, but the light curtain method has its inherent defects, such as its strict vehicle speed requirement, only when the vehicle travels at 3-5 (km / h) When traveling straight at a constant speed, this method can only achieve the measurement accuracy of the national standard. [0003] The current vehicle length measurement methods are: invention patent (application number: 201610595422.7, name: vehicle outline dimension light curtain measurement device and method), which measures the length of the vehicle through the length measurement light curtain receiver; invention patent (application number: 201610248454. X, name: a light curtain type vehicle outline size detecti...

Claims

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Application Information

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IPC IPC(8): G01S17/50
CPCG01S17/50
Inventor 王孖豪高飞刘浩然陈丽格汪鹏飞卢书芳张元鸣程振波肖刚
Owner ZHEJIANG UNIV OF TECH
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