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Laser radar system without blind area

A lidar, no blind spot technology, used in radio wave measurement systems, climate sustainability, instruments, etc., to avoid echo signal distortion, achieve blind spot measurement, and avoid specular reflection effects.

Active Publication Date: 2018-12-14
江苏光在科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a laser radar system without blind spots, which can solve the detection blind spot problem of the split-transmitter laser radar

Method used

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  • Laser radar system without blind area
  • Laser radar system without blind area

Examples

Experimental program
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Effect test

Embodiment 1

[0043] The lidar equation is as follows:

[0044]

[0045] A 0 / r 2 is the solid angle of the lidar receiver;

[0046]T(λ, r) is the propagation factor in the atmosphere with respect to distance r and wavelength λ;

[0047] ξ(λ) represents the receiver spectral transmission factor;

[0048] O(r, R) represents the probability of a particle being detected at position r at height R, and it is called the geometric overlap factor because it only depends on the overlapping area of ​​the laser beam and the receiver.

[0049] From the above lidar equation, it can be seen that the geometric overlap factor has a great influence on the echo power and detection ability of lidar.

[0050] figure 1 The basic structure of the laser radar with separate transceivers is shown. The split transceiver structure is also called the off-axis structure. The transmitting telescope and the receiving telescope are set separately, and the two optical axes are kept parallel. The transmitting field...

Embodiment 2

[0087] image 3 It is a structural diagram of another blind-spot-free lidar system provided by the present invention. The difference between Embodiment 2 and Embodiment 1 lies in the number and structure of the transmitting telescope and the receiving telescope. Such as image 3 As shown, a laser radar system without blind spots includes: a light source module 1, an optical amplification module 3, an optical transceiver module, a detector module 6, a data acquisition module 7 and a data processing module 8, wherein:

[0088] The light source module 1 is used to output a laser signal; the laser signal output by the light source module 1 is pulsed light;

[0089] The optical amplification module 3 is used to amplify the laser light output by the light source module 1, and input it to the optical transceiver module;

[0090] The optical transceiver module includes at least one transmitting telescope 4 and at least one receiving telescope 5, the optical axes of the transmitting...

Embodiment 3

[0104] image 3 It is a structural diagram of another blind-spot-free lidar system provided by the present invention. The difference between Embodiment 3 and Embodiment 1 lies in the number and structure of the transmitting telescope and the receiving telescope, and the rest are the same as Embodiment 1, and will not be repeated here. Such as image 3 As shown, a laser radar system without blind spots includes: a light source module 1, an optical amplification module 3, an optical transceiver module, a detector module 6, a data acquisition module 7 and a data processing module 8, wherein:

[0105] The light source module 1 is used to output a laser signal; the laser signal output by the light source module 1 is pulsed light;

[0106] The optical amplification module 3 is used to amplify the laser light output by the light source module 1, and input it to the optical transceiver module;

[0107] The optical transceiver module includes at least one transmitting telescope 4 an...

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Abstract

The invention discloses a laser radar system without a blind area. According to the system, the side face of each of a transmitter telescope and a receiver telescope in the thickness direction comprises at least one plane; and one plane of the transmitter telescope and one plane of the receiver telescope are closely attached. Therefore, a measurement blind area of a receiving and transmitting separate laser radar system is ingeniously eliminated, and the technical prejudice that the receiving and transmitting separate laser radar system has a measurement blind area is overcome. Meanwhile, by the adoption of a receiving and transmitting separate telescope system, the transmitter telescope and the receiver telescope are arranged in parallel, specular reflection does not exist, therefore, distortion of a first echo signal caused by strong specular reflection of a receiving and transmitting simultaneous laser radar system is effectively avoided, and the measurement result is more accurate.Through the system, the specular reflection effect can be effectively avoided while blind-area-free measurement of the laser radar system is realized.

Description

technical field [0001] The invention relates to a laser radar, in particular to a laser radar system without a blind zone. Background technique [0002] Lidar is an active modern optical remote sensing technology, which is the product of the combination of traditional radar technology and modern laser technology. Laser has the characteristics of high brightness, high directivity, high coherence, and high peak power. Therefore, lidar has the advantages of high angular resolution, high distance resolution, high time resolution, high measurement accuracy, long detection distance, multi-target detection, and strong anti-interference. By using laser as an information carrier, lidar can carry information with amplitude, frequency, phase, and polarization. Therefore, it can not only accurately measure distance, but also accurately measure frequency shift, angle, attitude, and depolarization. Following microwave radar, lidar increases the frequency of radiation sources to optical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/06G01S7/02
CPCG01S7/02G01S17/06Y02A90/10
Inventor 张苏黄允芳
Owner 江苏光在科技有限公司
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