Patent ID: 9255795
Filing Date: 2016-02-09
CPC Classification: G01C,G01S

Claim Text:
1. A method of increasing signal-to-noise ratio of a distance-measuring device, the distance-measuring device being utilized for measuring a measured distance between the distance-measuring device and a measured object, the measured distance being longer than a predetermined shortest measured distance and shorter than a predetermined longest measured distance, the distance-measuring device having a light-emitting component for emitting a detecting light, and a first light-sensing component for sensing and accumulating energy of light according to a first shutter periodic signal to generate a light-sensing signal, the method comprising: the light-emitting component continuously emitting the detecting light to the measured object to generate a reflected light during an emitting period; a delay period after the light-emitting component starts to emit the detecting light, the first light-sensing component sensing and accumulating energy of the reflected light during a sensing period to generate the light-sensing signal; obtaining a time of flight of light going back and forth between the distance-measuring device and the measured object according to the light-sensing signal and energy of the detecting light emitted by the light-emitting component during the emitting period; and obtaining the measured distance according to the time of flight;