Distance measurement system and method

Abstract

The invention discloses a distance measuring system, which comprises an emitter, a collector and a processing circuit, wherein the emitter and the collector are arranged along a baseline, the emittercomprises a light source array composed of a plurality of light sources, the light source array comprises a plurality of sub light source arrays, the sub light source arrays are configured to be started one by one in the baseline direction to emit spot light beams, the collector comprises a pixel array composed of a plurality of pixels, the pixel array comprises a plurality of sub-pixel arrays, the plurality of sub-pixel arrays are configured to collect photons in a light beam reflected back by the spot light beam through a to-be-measured target object and form a photon signal, the processingcircuit comprises a plurality of sub-processing circuits, and the sub-processing circuits are connected with the sub-pixel arrays in a one-to-one correspondence mode so as to control pixels in the sub-pixel arrays to be started, collect photons in the reflected light beams and calculate flight time. According to the invention, the spatial resolution is improved, the problem of superpixel overlapping is solved, and the distance measurement precision is improved; and the process cost and the complexity are effectively reduced.

Description

technical field [0001] The invention relates to the technical field of optical distance measurement, in particular to a distance measurement system and a measurement method. Background technique [0002] Using the principle of time of flight (TOF, Time of Flight) can measure the distance of the target to obtain a depth image containing the depth value of the target, and the distance measurement system based on the principle of time of flight has been widely used in consumer electronics, unmanned vehicles, AR / VR and other fields. The distance measurement system based on the time-of-flight principle usually includes a transmitter and a collector. The transmitter emits a pulsed beam to irradiate the target field of view and the collector collects the reflected beam, and calculates the time required for the beam to be emitted to reflected back and received to calculate the object. distance. [0003] Currently, a collector in a distance measurement system based on the time-of-f...

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, due to the limited size of the combined pixel, affected by system tolerance and parallax, the spot imaged by the reflected beam on the pixel array is likely to go out of bounds and lose the distance measurement information. Therefore, strict control of tolerance and compression are required. baseline, which increases the difficulty of desi

Images