Difference light spot based moving vehicle three-dimensional detection method and detection device
A three-dimensional detection and vehicle technology, which is applied in the direction of measuring devices, optical devices, road vehicle traffic control systems, etc., can solve the problems of out-of-synchronization detection time, low recognition reliability, and high cost, so as to reduce operational complexity and Convenience and directness, the effect of reducing the cost of detection
Active Publication Date: 2018-06-22
SUN YAT SEN UNIV
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Problems solved by technology
And the current traffic target distance detection methods mainly include radar detection, laser detection, lidar detection and computer vision detection; but these methods have certain limitations: radar detection methods generally cannot effectively distinguish multiple targets in the beam interval, and in complex The detection results in the traffic environment are often not accurate enough; the laser radar needs to scan point by point when performing multi-point distance detection, and the detection time of each point is not synchronized, and the cost is high; use traditional computer binocular vision to measure the multi-point distance of traffic targets There are problems of large amount of calculation and low recognition reliability in synchronous measurement
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Embodiment 1
[0040] Such as figure 2 Shown is the first embodiment of the three-dimensional detection device for moving vehicles based on differential spot of the present invention, including a cube dichroic prism, a delay circuit, a control unit, two sets of imaging units and a structured light emitter:
[0041] Cube beamsplitter is composed of two rectangular prisms, including incident surface, exit surface, reflective surface and penetrating surface. The incident light is divided into reflected light and transmitted light according to the ratio of 1:1; on the incident surface and exit surface, Coated with anti-reflective multilayer coating. Since the dielectric film has almost no absorption, the loss of incident light is small; the two sets of imaging units are respectively installed on the light-reflecting and penetrating surfaces of the cube beam splitter, so that the images taken by the two sets of imaging units at the same time are completely overlapped.
[0042] The structured li...
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The invention relates to the technical field of moving vehicle detection, in particular to a difference light spot based moving vehicle three-dimensional detection method and detection device. The detection device comprises a cubic beam splitter prism, a delay circuit, a control unit, two groups of imaging units and two groups of structural light emitters. By mounting of the two parallel linear-structure light emitters and the two vertical imaging units at positions, available for observing surroundings, in a vehicle, the imaging units shoot surrounding vehicles in a traveling process, starting time of the two imaging units and the structural light emitters can be accurately controlled through the delay circuit, and a stable time interval of shooting time of the two imaging units is controlled. The control unit subjects two images shot at the same time to difference, and moving vehicle multi-target-point synchronous distance detection and three-dimensional cross section construction can be realized through extraction of a pixel distance between two linear-structure light rays in difference images, so that detection cost and complexity in operation can be effectively reduced, and convenience and quickness in operation are achieved.
Description
technical field [0001] The present invention relates to the technical field of moving vehicle detection, and more specifically, to a three-dimensional detection method and detection device for moving vehicles based on differential light spots. Background technique [0002] With the advancement of information technology, the transportation system is undergoing leapfrog development, and the degree of intelligence is getting higher and higher. The development of driverless cars, vehicle-road coordination systems, and intelligent traffic control is changing with each passing day. However, the realization of all these technologies must be based on the accurate perception of traffic operation status. An important part of accurate perception of the surrounding environment is to detect the distance between the vehicle and other surrounding vehicles, obstacles, etc., so that the vehicle can take measures in advance, re-plan the route or take corresponding measures to avoid collisions...
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IPC IPC(8): G01B11/02G01B11/24G08G1/017G06K9/20
CPCG08G1/0175G01B11/02G01B11/24G06V20/584G06V10/147
Inventor 张辉陈静萍林军记王浩远
Owner SUN YAT SEN UNIV