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A Realization Method of Sparse Array High Speed ​​3D Imaging LiDAR

A three-dimensional imaging and lidar technology, which is used in the re-radiation of electromagnetic waves, the use of re-radiation, and measurement devices, etc., can solve the problems of difficult to solve military and aerospace needs, small space requirements, and large investment. Overcome the effect of space cold welding and life improvement

Active Publication Date: 2015-10-21
SHANGHAI RADIO EQUIP RES INST
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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

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  • A Realization Method of Sparse Array High Speed ​​3D Imaging LiDAR
  • A Realization Method of Sparse Array High Speed ​​3D Imaging LiDAR

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Embodiment Construction

[0016] see in conjunction figure 1 , figure 2 , in the figure 1 is the laser; 2 is the beam expander; 3 is the piezoelectric ceramic two-dimensional vibrating mirror; 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] Piezoelectric ceramic two-dimensional vibrating mirror is a driving mechanism that quickly realizes small-amplitude two-dimensional scanning. Its response frequency can generally reach 2KHz. Do small-scale high-speed scanning.

[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, laser emission power, sensitivity of the detector, and scanning field of view of the piezoelectric ceramic two-dimensional galvanometer.

[0019] The sparse array detection system is to arrange the single detectors evenly according to a certai...

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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 advantages of not depending on the illumination conditions or radiation characteristics of the target, working around the clock, and obtaining three-dimensional information of the target; compared with microwave radar, it has high resolution and small size , Light weight. Therefore, it has good application prospects in civil and military fields. At present, there are two ways of 3D imaging lidar. One is a laser beam scanning method; the other is a focal plane array detection method. [0003] The laser beam scanning method generally adopts high-repetition-frequency laser pulse emission, and through mechanical scanning devices (such as double galvanometer galvanometers, rotating wedge prisms, etc.), the laser pulses are directed to different points on the detection airspace accor...

Claims

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Application Information

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Patent Type & Authority Patents(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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