Semiconductor laser distance measuring device based on switched capacitor array sampling

Abstract

The invention relates to a semiconductor laser distance measuring device based on switched capacitor array sampling. The distance measuring device comprises an emission end and a receiving end which are connected with a main control module. The emission end successively comprises an LD driving module, an LD module and an LD shape adjusting emission module. The receiving end successively comprises an echo receiving module, an APD amplifying module, an SCA sampling integration module and an ADC module. The SCA sampling integration module comprises N sampling units. Each of the sampling units comprises a sampling switch, an output switch and a sampling capacitor. Digital pulses are transmitted in order, so the sampling switches of the sampling units are successively closed. When the sampling switches are closed, input current signals will charge the sampling capacitors in the corresponding positions. Compared with the traditional AD sampling and storing method, requirements on power consumption of a system and operation speed of a processor are greatly reduced; and quite far acting distance and quite high distance measuring precision can be achieved via quite small size of the system and quite low power consumption.

Description

technical field [0001] The invention relates to the field of laser ranging, in particular to a semiconductor laser ranging machine based on switched capacitor array sampling. Background technique [0002] Laser ranging technology is widely used in the fields of national life and military applications, and there is a strong demand for small-volume, low-cost, long-distance, low-power, and high-precision laser ranging systems. However, limited by factors such as laser light source and detector sensitivity, it is usually difficult to meet the above requirements at the same time. Laser rangefinders based on semiconductor lasers have small volume and power consumption, and are a common small rangefinder. However, due to the low emission power of semiconductor lasers, the single-pulse detection range is usually only a few hundred meters. Contents of the invention [0003] In order to improve the measuring distance range and ranging accuracy of the semiconductor laser distance me...

AI Technical Summary

Problems solved by technology

However, limited by factors such as laser light source and detector sensitivity, it is usually difficult to meet the above requirements at the same time

Laser rangefinders based on semiconductor lasers have small volume and power consumption, and are a common small rangefinder. However, due to the low emission power of semiconductor lasers, the single-pulse detection range is usually only a few hundred meters.

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