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Implementation method for sparse array high-speed three-dimensional imaging lidar

A technology of three-dimensional imaging and laser radar, which is applied to the re-radiation of electromagnetic waves, the use of re-radiation, and measuring devices, can solve problems such as large investment, difficult to solve military, aerospace needs, and small space requirements, and achieve life expectancy. Reduce and overcome the effect of space cold welding

Active Publication Date: 2012-07-11
SHANGHAI RADIO EQUIP RES INST
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  • Abstract
  • Description
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Problems solved by technology

Therefore, it is difficult to solve the military and aerospace needs of our country
However, due to the limitations of the domestic semiconductor industry base, there is a great distance between us and foreign countries in the development of dedicated large-scale chips; at the same time, this research requires a huge investment, so it is even less likely to use this solution to solve our current space requirements

Method used

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  • Implementation method for sparse array high-speed three-dimensional imaging lidar
  • Implementation method for sparse array high-speed three-dimensional imaging lidar
  • Implementation method for sparse array high-speed three-dimensional imaging lidar

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Embodiment Construction

[0016] see in combination figure 1 , figure 2 , 1 is the laser in the figure; 2 is the beam expander; 3 is the piezoelectric ceramic two-dimensional galvanometer; 4 is the receiving system; 5 is the sparse array detection system; 6 is the target screen; 7 is the base; 8 is the sparse array detection Enlarged view of the system.

[0017] The piezoelectric ceramic two-dimensional galvanometer is a driving mechanism that can quickly realize small-amplitude two-dimensional scanning. Its response frequency can generally reach 2KHz. Do a high-speed scan in a small area.

[0018] The receiving system is a set of common imaging optical paths, and its receiving aperture and field of view depend on the requirements of the imaging field of view, the laser emission power, the sensitivity of the detector, and the scanning field of view of the piezoelectric ceramic two-dimensional galvanometer.

[0019] The sparse array detection system is to arrange the single detectors uniformly accor...

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Abstract

The invention relates to the field of three-dimensional imaging lidars, and aims to overcome the deficiencies of the prior art and provide an implementation method for a sparse array high-speed three-dimensional imaging lidar. In the implementation method, convenient and easily-obtained single detectors are utilized to form a sparse array detection system through sparse arrangement, piezoceramic low-angle quick scanning is combined to realize quick photoelectric conversion in a target echo signal subzone and solve the problems in high-speed three-dimensional imaging of the lidar. The invention is characterized in that an imaging detection optical system comprises a piezoceramic two-dimensional vibrating mirror (3), a laser receiving system (4) and the sparse array detection system (5). The invention has the advantages as follows: motor-free rotational scanning is realized, the whole structure is simple and the reliability is improved; the array detection has high imaging frame frequency and can satisfy high-speed measurement; devices are easy to obtain; and the transmit-receive separation layout has a low requirement for emitted light, and the installation is convenient.

Description

Technical field: [0001] The invention relates to the field of three-dimensional imaging laser radar. Background technique: [0002] Compared with the existing optical imaging methods, lidar has the advantage of not depending on the lighting conditions or radiation characteristics of the target, working all day, and obtaining three-dimensional information of the target; compared with microwave radar, it has the advantages of high resolution and small size , Light weight. Therefore, it has a good application prospect in civil and military. At present, there are two ways of 3D imaging lidar. One is the laser beam scanning method; the other is the focal plane array detection method. [0003] The laser beam scanning method generally adopts high repetition frequency laser pulse emission, and through the mechanical scanning device (such as double galvanometer type galvanometer, rotating wedge prism, etc.) The spatial lattice is scanned, and the targets falling in the scanning a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/89
Inventor 陶坤宇徐国樑张大庆
Owner SHANGHAI RADIO EQUIP RES INST
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