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Expressway passage dynamic vehicle speed measuring method

A technology for vehicle speed detection and expressways, which is applied to measuring devices, radio wave measuring systems, instruments, etc., can solve problems such as inaccurate detection, difficult channel detection, and influence, and achieve an effect that is beneficial to identification

Inactive Publication Date: 2014-03-19
JILIN UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] Although ray fluoroscopy technology is a fast and efficient non-destructive testing method, it can well solve the problem of difficult detection of existing channels, but the detection is not accurate enough due to the impact of different vehicle speeds on the detection

Method used

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  • Expressway passage dynamic vehicle speed measuring method
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Embodiment Construction

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, and the purpose and effect of the present invention will be more obvious.

[0014] Such as figure 1 As shown, the present invention includes a first group of sensor nodes 1 , a second group of sensor nodes 2 , a third group of sensor nodes 3 , a ray generator 4 , a ray detector 5 , a radar speedometer 6 and a controller 7 . The radar speedometer 6 is set at the initial position where the vehicle enters. After a certain distance, the first group of sensor nodes 1, the second group of sensor nodes 2, the ray generator 4 and the ray detector 5 are set on both sides of the passage in sequence, and the third A group of sensor nodes 3, a controller 7; the distance between the second group of sensor nodes 2 and the ray detector 5 is 0.5 meters; each group of sensor nodes is composed of a pair of light beams, and three pairs of photoelectric switches ar...

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Abstract

The invention discloses an expressway passage dynamic vehicle speed measuring method. The method includes that a first group of sensor nodes, a second group of sensor nodes and a third group of sensor nodes input information, the opening and closing time of a radar speed measuring instrument is calculated according to on-off signals of the three groups of sensor nodes to accurately measure speed information of vehicles when a ray machine scans the vehicles. By means of the method, the speed of the dynamic vehicles can be well measured, and scanned image restoring effectiveness can be further ensured.

Description

technical field [0001] The invention belongs to a method for measuring a dynamic vehicle speed, and more particularly relates to a method for measuring a dynamic vehicle speed in an expressway channel. Background technique [0002] Patent CN101532968A discloses a green channel vehicle inspection system. In this patent, the ray source and the ray detector are fixed at a certain position, and the goods in the car are automatically detected by using the ray intensity received by the ray detector. The radiation source used in this patent is Co-60 or X-ray. Patent CN101943761A discloses an X-ray detection method. This patent can realize the fusion of the transmission map and the backscattering map, further enrich the security image information, and improve the observation and identification efficiency of the security inspector. The radiation source that can be used in this patent is X-ray. Patent CN202110299U discloses a green channel vehicle cargo inspection system. In addit...

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Application Information

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IPC IPC(8): G01S13/58G01V8/10
CPCG01S13/588G01V8/20
Inventor 李寿涛张浩郭鹏程张艳梅马用学
Owner JILIN UNIV
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