Contact laser interference displacement sensor and measuring method

Abstract

The invention relates to a contact laser interference displacement sensor and a measuring method, which overcome the problem that large-size and high-precision parts cannot be directly measured in theprior art, and realize the precision measurement of the large-size and high-precision parts. The contact laser interference displacement sensor comprises a sensor shaft sleeve, a hollow measuring rodis arranged on the sensor shaft sleeve through a rolling pair fixed at the front end of the sensor shaft sleeve, a measuring body and a reflector are sequentially arranged at the front end of the measuring rod, a collimator is arranged at the rear end of the sensor shaft sleeve and connected with an optical fiber, and the optical fiber is connected with a frequency modulation continuous wave interference signal processor. The front end and the rear end of the measuring rod are provided with a front limiting block and a rear limiting block respectively, and the front limiting block and the rear limiting block are in threaded connection with the measuring rod.

Description

Technical field: [0001] The invention relates to a laser displacement sensor, in particular to a contact type laser interference displacement sensor and a measuring method. Background technique: [0002] In recent years, in the fields of aerospace, automobile and shipbuilding, etc., the requirements for large-scale, high-precision geometric measurement of parts have become higher and higher, especially the demand for real-time and large-scale production site measurement has become increasingly prominent. As a displacement measurement media, the development of displacement sensor technology is also changing with each passing day. The current factory production workshop uses more displacement sensors, including inductance sensors (LVDT), pneumatic sensors, grating displacement sensors, Hall displacement sensors, laser triangulation displacement sensors, etc. Inductive displacement sensors, in particular, are widely used in the mechanical equipment industry due to their charac...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a contact laser interference displacement sensor and measurement method, which overcomes the problem that the measurement of large-size and high-precision parts cannot be directly realized in the prior art, and realizes the precision measurement of large-size and high-precision parts. Measurement

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