Semiconductor laser distance measuring device based on switched capacitor array sampling

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.