Laser radar multipoint distance measurement system on basis of diffraction optical components

Abstract

The invention relates to the technical field of machinery, and discloses a laser radar multipoint distance measurement system on the basis of diffraction optical components. The laser radar multipoint distance measurement system comprises a laser signal transmitting device, a laser signal receiving device and a signal processing system. The signal processing system is connected with the laser signal transmitting device and the laser signal receiving device, the laser signal transmitting device comprises a pulse laser device, and a collimation system, a beam expansion system, a diffraction grating and a half-transmitting and half-reflecting mirror are sequentially arranged in a light emitting direction of the pulse laser device; the light emitting direction of the pulse laser device is positioned in a transmitting direction of the half-transmitting and half-reflecting mirror, and the laser signal receiving device is arranged in a reflecting direction of the half-transmitting and half-reflecting mirror. The laser radar multipoint distance measurement system has the advantages that laser light transmitted by the pulse laser device can be divided into a plurality of light beams at equal angles or unequal angles by the diffraction grating, and the light beams can be transmitted via the half-transmitting and half-reflecting mirror, then face media at to-be-measured distances, can be reflected by the media at the to-be-measured distances and then can be reflected to the laser signal receiving device by the half-transmitting and half-reflecting mirror.

Description

technical field [0001] The invention relates to the technical field of ranging devices, in particular to a laser ranging system. Background technique [0002] Laser ranging is a new type of precision measurement technology that has emerged with the development of laser technology. Compared with traditional ranging technology, laser ranging technology has high precision, low power consumption, small size, strong anti-interference ability, accurate With the advantages of good straightness, it is widely used in industrial measurement and control, remote sensing, engineering construction safety monitoring and other fields. [0003] Lidar is an active modern optical remote sensing technology, which is the product of the combination of traditional radar technology and modern laser technology. At present, there are two methods of lidar: (1) single-channel detection system; (2) scanning mirror form. The first method has a single detection angle and low efficiency. The second metho...

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Problems solved by technology

The first method has a single detection angle and low efficiency. The second method is expensive and has a short service life, which is not conducive to popularization

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