Torsion angle measuring device and method based on utilization of polarization principle

Abstract

The embodiment of the invention discloses a torsion angle measuring device and method based on utilization of a polarization principle. The torsion angle measuring device based on utilization of the polarization principle comprises a polarized light emitting module and a torsion measuring module, wherein the polarized light emitting module is used for generating polarized light, and the torsion measuring module is positioned in front of the polarized light emitting module and used for receiving the polarized light, generating an electric signal corresponding to the light intensity and outputting torsion angle measurement data. The polarized light emitting module comprises a light source, a collimating lens and a first polarizing film, and the torsion measuring module comprises a second polarizing film, a rotating motor, an axial angle encoder, an objective lens and a photoelectric detector. The torsion angle measuring device based on the utilization of the polarization principle is simple in structure, software and hardware and high in integration level, high precision and wide range of torsion angle measurement are achieved at the same time, and the measuring method is simple andeasy to implement.

Description

technical field [0001] The invention relates to the technical field of three-dimensional angle measurement, in particular to a device and method for measuring torsion angles using the principle of polarization. Background technique [0002] Angle measurement technology with high precision and large measurement range has become a common demand and development direction in the angle measurement industry. The photoelectric measurement method is a method of angle measurement technology, which has the advantages of long working distance, non-contact, and high measurement accuracy. The photoelectric measurement method is generally realized by a special optical system combined with a light source, a detector and other means. Three-dimensional angle measurement technology needs to be widely used in various large-scale installation projects, auxiliary processing, real-time monitoring and other occasions. [0003] The three-dimensional angle photoelectric measurement technology comp...

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Problems solved by technology

[0005] The autocollimation measurement method in the prior art relies on the optical system with a long focal length, which cannot take into account high precision and large range; and the autocollimation measurement method can only measure the angle change in the two dimensions of azimuth and pitch, and cannot directly measure the torsion angle. A rigid reference must be added to achieve the measurement o

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