Laser measurement device capable of performing measurement function switching during measurement as well as test method

A technology of laser measurement and function, applied in the direction of measuring devices, radio wave measurement systems, electromagnetic wave re-radiation, etc., can solve the problems of high operating requirements, high cost, high cost, lost, and can only start from scratch.

Pending Publication Date: 2020-02-18
SICHUAN UNIV
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Problems solved by technology

It is characterized by high precision, and can be combined with tracking technology to directly and quickly measure the profile shape of the tested part, but the target mirror must be continuously moved from the measurement starting point to the end point during measurement, and the beam is not allowed to be blocked in t

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  • Laser measurement device capable of performing measurement function switching during measurement as well as test method
  • Laser measurement device capable of performing measurement function switching during measurement as well as test method

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Embodiment 1

[0023] A laser measurement device that can perform measurement function conversion during measurement, including a thermal frequency-stabilized He-Ne laser, a measurement unit, and a signal processing system. That is, the light emitted by the thermal frequency-stabilized He-Ne laser is transmitted and reflected by each component of the measurement unit, received by the avalanche tube, and then sent to the signal processing system for processing to obtain the measurement result.

[0024] The thermal frequency-stabilized He-Ne laser is a patented dual-longitudinal-mode thermal-frequency-stabilized laser previously applied by the applicant.

[0025] The measurement unit includes beam splitter 2, beam splitter 7, beam splitter 3, target mirror 4, polarizer 5, polarizer 11, polarizer 13, avalanche tube 6, avalanche tube 12, avalanche tube 14, polarizing beam splitter 8, pyramid The short guide rail slide plate 15 of mirror 9, pyramid mirror 10,200mm.

[0026] In the present invent...

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Abstract

The invention discloses a laser measurement device capable of performing measurement function switching during measurement. The laser measurement device comprises a thermal frequency stabilization He-Ne laser (1), a measuring unit (16) and a signal processing system, lights emitted from the thermal frequency stabilization He-Ne laser (1) pass the measuring unit (16) and then are sent to the signalprocessing system, processing is performed, and a measurement result is obtained. The laser measurement device is characterized in that the measuring unit (16) comprises a reflecting mirror (24) anda light shielding plate (23) which can be changed in position; when an interference measurement function is used, a light beam returned by a target lens (4) is reflected via the reflecting mirror (24)and then passes a polarizer (5) and an avalanche transistor (6); when an absolute distance measurement function is used, the reflecting mirror (24) is changed in position and is not located on a light path of the light beam returned by the target lens (4), the light beam returned by the target lens (4) passes a polarizer (11) and is received by an avalanche transistor (12), the light shielding plate (23) is changed in position and is located between a polarizing beam splitter (8) and a pyramidal prism (10), and a light path of a light beam transmitted from the polarizing beam splitter (8) isshielded.

Description

technical field [0001] The invention relates to the technical field of laser distance measurement, in particular to a laser measurement device and a test method capable of converting the functions of absolute distance measurement and interferometric measurement during measurement. Background technique [0002] There are currently two methods of practical application for the precise measurement of the length and contour shape of large-scale manufactured parts: ①The absolute distance measurement method introduced in Li Guangyun's "Surveying and Mapping Bulletin" 1998. (10) "The latest development of industrial three-dimensional coordinate measurement system" : The industrial photoelectric measurement system composed of electronic theodolite, total station, digital camera, etc. as sensors can measure the measured distance at one time. It is characterized by mature technology, low cost, and low requirements for the use environment; but the accuracy is generally not high. The poi...

Claims

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Application Information

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IPC IPC(8): G01S17/08G01S7/481
CPCG01S17/08G01S7/481
Inventor 张涛黄伟尹伯彪
Owner SICHUAN UNIV
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