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Target Detection LiDAR Based on Spatial Wavelength Coding

A laser radar and target detection technology, applied in the field of laser remote sensing, can solve problems such as mechanical structure damage, lower spatial resolution accuracy of laser radar, structural instability of mechanical scanning devices, etc., and achieve the effect of large field of view

Active Publication Date: 2021-01-08
袁金龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to achieve full sky coverage, lidar needs to be equipped with a high-speed scanning device, but the mechanical scanning device has an unstable structure and is greatly affected by changes in ambient temperature, humidity and stress, and long-term high-speed operation of the mechanical structure will cause structural damage, thus Increased system maintenance costs and reduced spatial resolution accuracy of lidar

Method used

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  • Target Detection LiDAR Based on Spatial Wavelength Coding
  • Target Detection LiDAR Based on Spatial Wavelength Coding
  • Target Detection LiDAR Based on Spatial Wavelength Coding

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Embodiment

[0038] figure 1 It is a schematic structural diagram of a target detection laser radar based on spatial wavelength coding provided by the present invention, such as figure 1 As shown, the target detection laser radar (hereinafter referred to as laser radar) provided by the present invention includes:

[0039] Continuous broadband laser 1 , pulse generator 2 , circulator 4 , grating 5 , telescope transceiver system 6 , filter 7 , dispersion device 8 , single-photon imaging CCD 9 , and signal processing system 10 .

[0040] The devices are connected in the following order: the output end of the continuous broadband laser 1 is connected to the input end of the pulse generator 2, the output end of the pulse generator 2 is connected to the a port (input end) of the circulator 4, and the The b port (receiver end) is connected to the grating 5, the laser pulse signal is transmitted into the atmosphere through the telescope transceiver system 6, the echo signal after the interaction ...

Embodiment 2

[0058] Figure 4 It is a structural schematic diagram of another target detection lidar based on spatial wavelength coding provided by the present invention, as shown in Figure 4 As shown, the target detection lidar provided by the present invention includes:

[0059] Continuous broadband laser 1, pulse generator 2, pulse amplifier 3, circulator 4, grating 5, telescope transceiver system 6, filter 7, dispersion device 8, single photon imaging CCD 9, signal processing system 10.

[0060] The devices are connected in the following order: the output end of the continuous broadband laser 1 is connected to the input end of the pulse generator 2, the output end of the pulse generator 2 is connected to the input end of the pulse amplifier 3, the output end of the pulse amplifier 3 is connected to the ring The a port (input end) of the circulator 4 is connected, and the b port (receiver end) of the circulator 4 is connected to the grating 5. The laser pulse signal is transmitted int...

Embodiment 3

[0063] The present invention also provides a target detection laser radar measurement method based on spatial wavelength coding, based on the target detection laser radar based on spatial wavelength coding described in Embodiment 1 and Embodiment 2, the method includes:

[0064] The continuous broadband laser outputs laser light to the pulse generator;

[0065] The pulse generator modulates the input laser light and outputs it to the circulator;

[0066] The circulator outputs the input laser light to the grating, and then outputs it to the telescope transceiver system after passing through the grating;

[0067] The echo signal after the interaction between the laser and the atmosphere is received by the telescope transceiver system and then input to the grating;

[0068] After the laser space is encoded by the grating, it is output by the circulator to the filter for filtering;

[0069] The signal output by the filter is input to the dispersion device, and the dispersion de...

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Abstract

The invention discloses a target detection laser radar based on spatial wavelength coding. The laser radar uses a wide-spectrum light source, and performs wavelength modulation on the wide-spectrum light source through a grating, so that laser of different wavelengths points to different airspaces to achieve spatial coding; by using a dispersion device, echo signals received by the same telescopeare spatially separated according to the difference in wavelength to realize spatial decoding; the atmospheric echo signals in different airspaces (different wavelengths) are detected by adopting a high-speed CCD, and the information such as specific azimuth, distance, running track and size of a detection target is obtained by collecting and analyzing the signals. The target detection laser radarbased on spatial wavelength coding of the wide-spectrum light source provided by the invention has the characteristics of large coverage area, high spatial resolution and high time resolution, simultaneous multi-target tracking, compact structure, and precise positioning and tracking of multiple high-speed small targets in a large range.

Description

technical field [0001] The invention relates to the field of laser remote sensing, in particular to a target detection laser radar based on spatial wavelength coding. Background technique [0002] Lidar is widely used in target tracking, precise guidance, meteorological measurement, pollution detection, underwater detection, space surveillance and other fields because of its high temporal and spatial resolution, high detection accuracy, and strong anti-interference ability. It has a wide range of application value in civilian use. Compared to microwave radar, laser wavelengths are several orders of magnitude shorter than microwave wavelengths and have narrower beams. The advantages of lidar are: high detection sensitivity and measurement resolution, including angular resolution, velocity resolution and distance resolution; large amount of information, frequency, amplitude and phase information can be obtained; strong anti-interference ability, good concealment; volume Smal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/58G01S17/89G01S7/48G01S7/487G01S7/483G01S7/484
CPCG01S7/4802G01S7/4804G01S7/483G01S7/484G01S7/487G01S17/58G01S17/89
Inventor 张仁俊赵自豪
Owner 袁金龙