Scale Grating and Grating Ruler Displacement Sensor

Abstract

The embodiments of the invention disclose an optical grating ruler displacement sensor and a ruler optical grating. The optical grating ruler displacement sensor includes a light source module, an optical grating ruler main body, an optical signal detector and a signal processor; the light source module and the optical signal detector are located at two ends of the optical grating ruler main bodywhich extend along the length direction of optical fibers; the optical grating ruler main body, the light source module and the optical signal detector are located on the same horizontal plane; the optical signal detector is disposed on the linear guide rail of a machine under test, and moves linearly with the linear guide rail; the optical grating ruler main body comprises a plurality of opticalfibers distributed in a strip array; the outer sidewalls of the adjacent optical fibers are closely attached to each other; the optical signal detector is used for collecting optical signals carryingpulse fluctuation information, wherein the optical signals are the output light of the light source module transmitted through the optical fibers; and the signal processor calculates the displacementvalue of the machine under test based on the total number of pieces of pulse fluctuation information received during the movement process of the machine under test. With the optical grating ruler displacement sensor and the ruler optical grating of the invention adopted, the manufacturing process difficulty and production cost of the optical grating ruler are lowered, and a signal processing circuit is simpler.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of position measurement, in particular to a scale grating and a grating scale displacement sensor. Background technique [0002] With the rapid development of optical technology, optical measurement technology has also been developed accordingly. Grating ruler displacement sensor, referred to as grating ruler, is widely used in the measurement of mechanical angular displacement or linear displacement of closed-loop servo system of CNC machine tools. [0003] The grating scale displacement sensor is a precision measurement feedback device that works on the principle of grating optics, including a scale grating and a grating reading head. Usually, the scale grating is fixed on the moving parts of the machine tool, the grating reading head is installed on the fixed parts of the machine tool, and the indicating grating is installed on the grating reading head. in the head. At present, the ...

AI Technical Summary

Problems solved by technology

Not only the processing procedure is complicated, the efficiency is reduced, but the production cost is also very expensive

In addition, when measuring, since the absolute code track with absolute position information and the incremental code track used to generate subdivided position information are used to improve the accuracy of the measurement, more photoelectric receiving components need to be set To receive the reference signal incident on the incremental code channel, this makes the entire signal processing circuit more complicated, and it is necessary to perform averaging to eliminate noise during the signal processing process, and it is difficult for the circuit to process the signal

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