Five-path laser radar for vehicle and control method thereof

A technology of laser radar and radar, which is applied in two-dimensional position/channel control, using re-radiation, re-radiation of electromagnetic waves, etc., can solve the problems of weak earthquake resistance, long scanning period, complex structure, etc., and shorten the scanning period , high precision, easy to control the effect

Active Publication Date: 2012-07-04
DONGFENG MOTOR CORP HUBEI
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects and problems of long scanning period, complex structure, weak shock resistance and high cost in t

Method used

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  • Five-path laser radar for vehicle and control method thereof
  • Five-path laser radar for vehicle and control method thereof
  • Five-path laser radar for vehicle and control method thereof

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Embodiment

[0058] Hardware setup:

[0059] see figure 1 , figure 2 and Image 6 , a five-way laser radar for vehicles, including a radar controller 1 and five-way transceivers 4 arranged in a fan shape, each transceiver 4 includes a single-way laser emitting lens barrel 5, and a single-way laser receiving lens barrel 6 , drive circuit 7, amplifier 8 and high-speed comparator 9, the central axes of five single-path laser emitting lens barrels 5 all intersect at the same point on a plane, and the included angle between adjacent single-path laser emitting lens barrels 5 is 3°.

[0060] Radar controller 1: It is an FPGA processor with a main frequency of 200MHz, and the main frequency is related to the minimum identification time tmin.

[0061] see image 3 , Figure 4 , single-way laser emitting lens barrel 5: including the laser diode 51, the collimating lens 52 and the shaping lens 53 arranged in the shell 10 and its interior, the input end of the laser diode 51 is connected to the...

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Abstract

The invention relates to a five-path laser radar for a vehicle and a control method of the five-path laser radar. The five-path laser radar comprises a radar controller, and five paths of transceivers in fan-shaped arrangement, wherein each path of transceiver respectively comprises a laser emitting lens tube and a laser receiving lens tube, the center axes of the five paths of transceivers are all crossed at the same point on the same plane, and in addition, the included angle between the adjacent laser emitting lens tubes is identical. When the five-path laser radar is used, the five paths of transceivers are firstly controlled for sequentially emitting and receiving laser pulses, the interval time is identical, then, the passing time t between the emitting and the receiving of each path of laser pulses is calculated, next, the t is subjected to twice screening through a formula that t is greater than or equal to t<min> and smaller than or equal to 1mus and the variance, the threshold and the circulation number group, then, the qualified t average value in the cyclic number group is calculated, and finally, the region of obstacles, the distance between the obstacles and the vehicle and the relative speed are determined according to the average value, so obstacles are avoided. The design has the advantages that the scanning period is short, the structure is simple, in addition, the cost is lower, the anti-shock performance is higher, and the detection distance, the range and the precision can meet the vehicle requirements.

Description

technical field [0001] The present invention relates to a vehicle-used pulse laser radar, in particular to a vehicle-used five-channel laser radar and its control method. dodge. Background technique [0002] Lidar is a radar system that uses a laser beam to detect characteristic quantities such as the position and speed of a target. Its principle is to launch a laser beam to the target, compare the received echo reflected from the target with the transmitted signal, and obtain relevant information of the target after proper processing, such as target distance and speed. In terms of principle and structure, lidar is very similar to laser range finder. However, the detection range of the laser beam is extremely narrow, which cannot meet the requirements of the detection range of the vehicle radar. [0003] The Chinese patent number is ZL200310117381.3, and the invention patent issued on September 13, 2006 discloses a vehicle-mounted scanning laser radar detection system and...

Claims

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Application Information

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IPC IPC(8): G01S17/93G05D1/02
Inventor 尹韵于涛张成海樊景帅菅蒙张峻荧
Owner DONGFENG MOTOR CORP HUBEI
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