A three-dimensional coordinate measuring device and measuring method based on laser continuous frequency sweep

Abstract

The invention discloses a three-dimensional coordinate measuring device and a measuring method based on laser continuous frequency sweep, comprising: a light source, which generates polarized initial light to a first light splitting module; the first light splitting module divides the polarized initial light into reference light and second light The initial light; the second light splitting module divides the second initial light into several beams of detection light and sends them to the detection module; the detection module produces measurement light after the detection light is reflected by the object to be measured and enters the first light splitting module; the processing module receives the first beam of light A reference light and a measurement light of the spectroscopic module are processed. The method includes: establishing a coordinate system according to the measuring device; turning on the light source to obtain measurement data; and calculating the three-dimensional coordinates of the measured object according to the data. The substantive effects of the present invention are: simple structure, no need to collect the entire interference signal, and insensitive to external interference, the measurement of the beat frequency signal can be realized only by weak laser, and the long-distance three-dimensional coordinate measurement and position.

Description

technical field [0001] The invention relates to the technical field of optical measurement, in particular to a three-dimensional coordinate measurement device and measurement method based on laser continuous frequency sweep. Background technique [0002] With the continuous development of modern industry and high-precision measuring instruments, three-dimensional coordinate measurement has shown an extraordinary position in various fields, and the requirements for three-dimensional coordinate measurement technology are also constantly improving. [0003] Chinese patent application number CN108398694A, the application publication date is February 6, 2017, and the invention patent application document named "laser rangefinder and laser rangefinder method" discloses a device for measuring the length of an object using a laser rangefinder , but the device has a complex structure and cannot realize the measurement of the three-dimensional coordinates of the measured object. [0...

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Problems solved by technology

[0005] Aiming at the problem in the prior art that laser continuous frequency sweep is difficult to realize large-scale three-dimensional coordinate measurement, the present invention provides a three-dimensional coordinate measurement device and measurement method based on laser continuous frequency sweep, which has simple structure, convenient measurement, high precision and large measurement range

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