Method and device for scanning vehicles in three-dimensional mode through laser

A laser three-dimensional, laser scanning technology, applied in the field of laser applications, to achieve the effects of preventing missed detection, improving quality, and fast response

Active Publication Date: 2013-07-17
BEIJING WANJI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An embodiment of the present invention provides a laser three-dimensional scanning vehicle device to realize three-dimensional scanning of vehicle appearance and vehicle tracking, solve the problem of accurate statistics of traffic flow, vehicle type, vehicle speed, etc. in traffic condition investigation, improve accuracy, and prevent leakage. detection, false detection phenomenon

Method used

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  • Method and device for scanning vehicles in three-dimensional mode through laser
  • Method and device for scanning vehicles in three-dimensional mode through laser
  • Method and device for scanning vehicles in three-dimensional mode through laser

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Embodiment 1

[0064] An embodiment of the present invention provides a laser three-dimensional scanning vehicle exterior method, such as image 3 As shown, the method includes:

[0065] Step S301: Use a motion control unit to drive at least one pulsed laser to form a three-dimensional distance measuring light curtain.

[0066] Figure 4 It is a schematic diagram of the laser three-dimensional scanning measurement light curtain, and the motion control unit drives the pulsed laser to form a Figure 4 The three-dimensional distance measuring light curtain shown. For the convenience of further description of the embodiment, the following parameters are defined here:

[0067] VAr: The angular resolution of the scanning of the laser along the vertical vehicle driving direction, that is, the laser scans a point every VAr degree along the vertical vehicle driving direction to form a distance information;

[0068] VSa: The effective angle of scanning of the laser along the direction perpendicula...

Embodiment 2

[0094] The embodiment of the present invention also provides a laser three-dimensional scanning vehicle exterior device, which is preferably used to implement the method in the first embodiment above, such as Figure 8 As shown, the device includes:

[0095] The laser emitting and receiving unit 801 is configured to emit at least one laser beam and receive a returned optical signal. Specifically include:

[0096] Laser emitting module: used to emit at least one beam of laser. The laser is emitted from the laser source, and after passing through the collimation module, it directly or indirectly hits the side object;

[0097] Laser receiving module: used to receive diffusely reflected light and converge the reflected light to enhance the optical signal.

[0098] Motion control unit 802: used to control the three-dimensional movement of the laser emitting and receiving unit or / and the laser beam, including rotation or / and swing perpendicular to the driving direction of the vehi...

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Abstract

The invention discloses a device for scanning vehicles in three-dimensional mode through laser. The device comprises a laser emitting module for emitting a laser beam; a vertical movement control module for controlling the laser beam emitted by the laser emitting module to swing along a direction perpendicular to a vehicle moving direction to generate a laser scanning face; a parallel movement control module for controlling the laser scanning face to swing along the vehicle moving direction to generate a three-dimensional scanning area; a laser receiving module for receiving a reflecting light signal reflected when the vehicles pass through the three-dimensional scanning area; a data conversion module for converting the reflecting light signal into a distance signal; and a data analyzing module for generating vehicle information according to the distance signal. The method and device can determine vehicle shape correctly, improves traffic condition survey quality and avoids phenomena of detection negligence and mistaken detection and the like.

Description

technical field [0001] The invention relates to the technical field of laser applications, in particular to a method and device for laser three-dimensional scanning of vehicles. Background technique [0002] Traffic survey is the basis of macro management and decision-making in the transportation industry, a powerful weapon for us to understand transportation activities, and an important means to reflect the development law of transportation. At present, the automatic collection equipment used by my country's highway traffic observation stations is mainly divided into two categories: contact type and non-contact type. The contact type mainly includes ground sensing coil detection methods, piezoelectric weighing detection methods, etc.; the non-contact type mainly includes video image recognition methods, ultrasonic detection methods, etc. [0003] The ground induction coil detection method detects the vehicle through the coil pre-laid under the road, and the change of the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/04G08G1/052G01B11/04
Inventor 王庆飞代新邓永强王泮义
Owner BEIJING WANJI TECH
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