Phase-type laser ranging method and device based on hybrid measuring ruler

Abstract

The invention discloses a mixed measuring ruler-based phase type laser distance measuring method. According to the method, measuring rulers of a plurality of frequencies are mixed through a frequency mixer, so that a mixed measuring ruler can be obtained; and the mixed measuring ruler is transmitted to a target through a laser transmitter. With the mixed measuring ruler-based phase type laser distance measuring method adopted, the laser measuring ruler is only needed to be transmitted for once, and a plurality of measuring rulers with different frequencies can be obtained, and therefore, the number of transmitting times of the laser measuring ruler can be effectively reduced, and measuring speed can be improved, and moving targets can be also measured accurately. The mixed measuring ruler-based phase type laser distance measuring method of the invention has the advantages of short measuring response time, low possibility of making mistakes in the tracking of the moving objects and low implementation difficulty.

Description

technical field [0001] The invention relates to the field of laser distance measurement, in particular to a phase-type laser distance measurement method based on a mixed measuring ruler and a measurement device applying the method. Background technique [0002] The ranging method used in the existing phase laser ranging products is: according to the maximum range, the system will alternately send out several measuring rulers with different ranging resolutions in a time-division manner, and then calculate the phase of each measuring ruler respectively. information, and fit the final distance. The defects of the existing phase-based ranging method are as follows: 1), the speed is slow, the system sends different measuring scales in a time-division manner, which slows down the measurement speed; 2), the tracking of moving targets is easy to make mistakes, because Each measuring ruler is sent in time-sharing. During the process, if the target moves relative to each other, it wi...

AI Technical Summary

Problems solved by technology

The defects of the existing phase-based ranging method are as follows: 1), the speed is slow, the system sends different measuring scales in a time-division manner, which slows down the measurement speed; 2), the tracking of moving targets is easy to make mistakes, because Each measuring ruler is sent in time-sharing. If the target moves relative to each other during this process, it will cause deviation of the measuring ruler, and finally it will cause wrong fitting when the final distance is fitted.

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