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Method for matching vehicle speed based on linear array CCD image

A vehicle speed and matching method technology, which is applied in the field of vehicle speed matching based on linear array CCD images, can solve the problems of heavy maintenance workload, reduced road carrying capacity, inconvenient installation, etc., and achieve clear vehicle targets, high speed measurement accuracy, high resolution effect

Inactive Publication Date: 2010-12-08
CHANGAN UNIV +2
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Problems solved by technology

However, its installation needs to destroy the road surface and reduce the bearing capacity of the road surface. At the same time, it is inconvenient to install and requires a lot of maintenance work.
Compared with the above-mentioned speed measurement methods, the advantages of the video speed measurement method are: no special equipment is required, the cost of the speed measurement system is greatly reduced, and the system stability is relatively high. However, the traditional video speed measurement is generally carried out by area array CCD. Influenced by factors such as low rate and low image frame rate, the speed measurement accuracy of the area array CCD is not high

Method used

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  • Method for matching vehicle speed based on linear array CCD image
  • Method for matching vehicle speed based on linear array CCD image
  • Method for matching vehicle speed based on linear array CCD image

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Embodiment Construction

[0015] The vehicle speed matching method based on the linear array CCD image of the present invention, its concrete steps are as follows:

[0016] 1) Install two linear array CCD cameras on two cross-sections of the road at a certain distance (about 2000mm). The direction of the array CCD camera points vertically downward. The usual line array CCD camera is selected, the frame rate of the line array CCD camera is greater than 1000 frames per second, and the resolution is greater than 1024 lines.

[0017] attached figure 1 It is the layout diagram of the linear array CCD camera. according to figure 1 As shown, two linear array CCD cameras are installed parallel to each other on a bracket at a certain distance (2 meters), pointing vertically downward, and the linear array CCD cameras are equipped with infrared laser sources, which are in the same direction as the linear array CCD cameras. Vertical down. The emission power of the infrared laser source is less than 1w.

[00...

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Abstract

The invention discloses a vehicle speed matching method based on linear array CCD image, including the following steps that: two linear array CCD video cameras are respectively arranged on two sections positioned on a road at intervals; both linear array CCD video cameras face downwards and are provided with infrared ray laser source; the frame rate of each CCD video camera is more than 1,000 frames per second, and the resolution is more than 1,024 lines; correlation matching computation of the image sequences obtained by both linear array CCD video cameras is carried out to obtain the time difference of the same object in two image sequences; finally, by means of the time difference and the distance between both cameras, the driving speed of an object vehicle can be obtained according tothe velocity formula V=s / t. The invention is suitable for vehicle speed measurement at a traffic station, etc.

Description

technical field [0001] The invention belongs to the technical field of traffic detection and video processing, and relates to a vehicle speed detection method in video detection, in particular to a vehicle speed matching method based on a linear array CCD image. Background technique [0002] The detection of the driving speed of the vehicle is an important parameter in the field of traffic detection, especially for the speed limit road section, the measurement of the driving speed of the vehicle becomes extremely important. Therefore, it is of great significance to improve the measurement accuracy of the traveling speed of the vehicle. [0003] At present, the commonly used vehicle speed measurement methods mainly include: Doppler radar speed measurement method, traffic information collection instrument speed measurement method, and video speed measurement method. Among them, the Doppler radar speed measurement method adopts the principle of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/80G08G1/052
Inventor 赵祥模宋焕生刘占文王国强徐志刚李卫江郑贵桢徐涛李娜梁敏建
Owner CHANGAN UNIV
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