A Lidar Imaging System Based on Compressed Sensing

A lidar imaging and compressed sensing technology, applied in lidar imaging systems, lidar, and signal processing fields, can solve problems such as difficulty in large-scale integration and hinder the development of push-broom lidar

Active Publication Date: 2016-08-24
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

However, it is difficult to achieve large-scale integration of linear array avalanche diode APD detectors. As far as the current technical means are concerned, only 25-50 units of APDs can be achieved. The process bottleneck of linear array APDs will largely hinder Development of Pushbroom LiDAR

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  • A Lidar Imaging System Based on Compressed Sensing
  • A Lidar Imaging System Based on Compressed Sensing
  • A Lidar Imaging System Based on Compressed Sensing

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Embodiment Construction

[0068] Combine below figure 1 A better example of the present invention is given, mainly for further detailed description, but not for limiting the scope of the present invention.

[0069] The specific embodiment of the present invention is mainly divided into the following steps:

[0070] (1) First determine the technical parameters of the components used in each module of the system, as follows: Laser emission module 1 adopts the laser of Shanghai Brillouin Laser Technology Co., Ltd., and the technical indicators are: working wavelength 1064nm, repetition frequency 100Hz, pulse energy 200mJ; The telescope imaging module 2 adopts the telescope of Edmund Optics (Shenzhen) Co., Ltd., the selected focal length is 304.8mm, and the aperture is 101.6mm. The digital micromirror DMD and the control module 3 adopt the DMD produced by TI Company of the United States, the technical index is 1024×768 pixels, the pixel size is 13.69 μm, the control board adopts the TI-Discovery-4100 matc...

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Abstract

The invention discloses a laser radar imaging system based on compressed sensing. A unit APD is adopted for the system, so that the bottleneck that large-scale integration of domestic line array APDs cannot be achieved at present is effectively broken through. The system is formed by a laser emission module, a telescope imaging module, a DMD, a control module, the APD, a synchronization module, a data acquisition module and an image reconstruction module. In the system, pulse laser is emitted to a target through the laser emission module, target reflection echoes are modulated through the DMD, sampling of the unit APD on a time series is achieved through a convergence lens, and finally a three-dimensional image of the target is reconstructed on the basis of a compressed sensing theory by means of related algorithms. The laser radar imaging system based on compressed sensing has the advantages that scanning is not needed, the structure is simple, the data size needed for image reconstruction is small, and detection sensitivity is high.

Description

technical field [0001] The invention relates to computational imaging technology and image reconstruction algorithm, signal processing and laser radar. In particular, it relates to a lidar imaging system based on compressed sensing. Background technique [0002] Lidar is an active photoelectric imaging technology. Compared with ordinary passive optical remote sensing detection and microwave radar, it has high resolution, good concealment, strong anti-interference ability, etc.; it can detect real objects through clouds, vegetation, etc. ground terrain. LiDAR transmits pulsed laser signals to the target, and then processes the received signal (echo signal) reflected from the target and the transmitted signal, so that relevant information of the target can be extracted, such as target distance, orientation, and attitude. , shape and other parameters. Using this kind of laser radar, in the military, it is possible to track, detect and identify enemy aircraft and missiles, so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/89G01S7/48
CPCG01S7/48G01S17/89
Inventor 马彦鹏舒嵘亓洪兴王义坤王雨曦葛明锋
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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