Laser distance measuring system

Abstract

The invention relates to a laser ranging system, which comprises a transmitting module comprising a transmitting optical system and a laser emitter for emitting a pulsed laser signal; a receiving module comprising a receiving optical system and a laser receiver for receiving the pulsed laser signal and converting the pulsed laser signal to a pulsed electrical signal; a time / digital converter for detecting and calculating the time difference between the transmitting the pulse signal and the receiving the pulse signal; a clock generator for outputting a calibrated clock signal to the time / digital converter; and a single chip microcontroller for controlling the transmitting module, the receiving module, the time / digital converter and the clock generator and calculating the actual distance of a target object from the position of the laser ranging system according to the time difference. The inventive laser ranging system has the advantages of compact optical system, high accuracy in time difference detection, calculation and calibration, small size of the entire product, low cost, less error and high reliability.

Description

【Technical field】 [0001] The invention relates to a laser ranging system, in particular to a laser ranging system adopting a pulse-echo (TOF, Time-of-Flight) laser ranging method. 【Background technique】 [0002] At present, there are many types of laser range finders, and there are many principles of using laser range finders. At present, the principles used in laser ranging can be roughly divided into three types: interference type, phase type and pulse echo type: [0003] 1. Interferometric laser ranging. The interferometric laser ranging method is extremely sensitive to the vibration of the external environment, and can only measure relative displacement, so it is suitable for precise measurement of extremely short distances and stable external environments. [0004] Second, phase laser ranging. The resolution of the phase laser ranging method is high, but since the phase detector can only measure the phase difference between the two signals (transmitting and receiving...

AI Technical Summary

Problems solved by technology

The time difference calculation method used in the current pulse-echo (TOF) laser ranging method has the disadvantages of complex circuit, high cost, low accuracy, low resolution, poor stability and reliability.

Most products using pulse-echo laser ranging methods have the disadvantages of relatively complex optical systems, mechanical structures, and circuit components.

Images