Novel photon counting laser radar 3D imaging method and device
A technology of photon counting and laser radar, which is applied in the direction of measuring devices, electromagnetic wave re-radiation, and utilization of re-radiation, can solve the problems of low echo utilization efficiency, large amount of collected data, and slow sampling speed, and achieve the reconstruction of data volume Small size, high image quality, and the effect of increasing the sampling rate
Pending Publication Date: 2021-06-11
SONGSHAN LAKE MATERIALS LAB +1
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Problems solved by technology
The sampling method of the traditional photon-counting lidar imaging system follows the Nyquist sampling theorem, which requires the signal sampling rate to be twice the signal bandwidth to accurately reconstruct the signal, which makes the sampling data very large and contains many redundant signals, which is not conducive to acquisition and in In order to reduce the hardware storage pressure and compress it during storage and transmission, there are slow sampling speed, large amount of collected data, low efficiency, and the single photon detector used has a small detection array, low sensitivity, and low echo utilization efficiency And other issues
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[0027] See Figure 1 to 4 The present embodiment provides a new photon count laser radar 3D imaging device including a laser 1, a multiode MCP-PMT array 2, a transmission and receiving optical system, a sprayer scanning device, a mirror group, DMD3, an photon counting module 17, and Control and data processor 4. The control and data processor 4 are preferably pre-installed with a labVIEW. The laser 1 is preferably a high-frequency pulse laser that meets a higher energy and a higher repetition frequency. Preferably, the multi-anode MCP-PMT array 2 is used as a detector to achieve a more weak or further distance.
[0028] For convenience, the laser 1, multi-anode MCP-PMT array 2, the transmission and receiving optical system, gammetic scanning device, mirror group, DMD3, and control and data processor 4 can be set on the workbench, and at work There is a laser 1, a multiode MCP-PMT array 2, a transmission and receiving optical system, a gammell scanning device, a mirror group, a DMD3...
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The invention discloses a novel photon counting laser radar 3D imaging method and device. The device comprises a laser, a multi-anode MCP-PMT array, a transmit-receive optical system, a galvanometer scanning device, a reflector group, a DMD, a photon counting module and a control and data processor. The imaging method takes compressed sensing as a basic theoretical framework, combines a photon counting laser radar system, takes a multi-anode MCP-PMT as a single-photon detector, obtains photon flight time information and photon number information, utilizes a compressed sensing reconstruction algorithm to invert and reconstruct a high-quality image, and combines the photon flight time information to realize 3D target imaging. The method has the characteristics of large area array, high sensitivity, simple and rapid sampling, small reconstruction data volume, ultrafast time response, strong magnetic field interference resistance, high imaging quality and the like, greatly improves the sampling rate and the imaging quality, and is particularly suitable for detection and 3D imaging of dark and weak targets.
Description
Technical field [0001] The present invention relates to the field of photon count laser radar 3D imaging techniques, and in particular, to a new photon count laser radar 3D imaging device. Background technique [0002] Traditional laser radar is relatively large due to its weight, volume, and power consumption, low system detection, low sensitivity, and is susceptible to external environmental impacts, limited application range. Laser radar based on photon count detection has improved these shortcomings of traditional laser radar, and the detection of photon sensitivity can realize the detection of weak targets, with superior performance in deep space detection, aerospace and night target identification, and gradually become Hotspots of the new laser ranging 3D imaging study. In the imaging field of photon count laser radar, first, when imaging of long-distance targets under extremely weak illumination conditions, the acquisition of signals is easily affected by multiple noise, s...
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IPC IPC(8): G01S17/894
CPCG01S17/894
Inventor 赵卫余聪聪朱香平韦永林靳川
Owner SONGSHAN LAKE MATERIALS LAB