A Pull-Wire Displacement Sensor Based on Absolute Encoding

Abstract

The present invention proposes a pull-wire displacement sensor based on absolute coding, including: a casing, a winding unit, and a coding unit; The unit is installed in the casing for winding the cable; the encoding unit is installed on the casing and the winding unit for collecting displacement signals; the invention can realize the absolute measurement of the displacement of the cable, which has a wider range of application than the incremental measurement. Wide; The wire winder can automatically adjust its position along the spline, and there is no need to correct the relationship between the displacement of the wire and the angle of the wire winder in the later stage. The measurement accuracy is high, the code disc is easy to process, and high-resolution encoding can be realized.

Description

technical field [0001] The invention belongs to the field of pull-wire displacement sensors, in particular to a pull-wire displacement sensor based on absolute coding. Background technique [0002] The displacement sensor is an important part of the industrial measurement system, and the pull-wire displacement sensor with a simple principle has a wide range of applications in industrial measurement. Most of the traditional pull-wire displacement sensors use potentiometers or photoelectric effects as the core components of the detection and encoding of the winding wheel angle of the pull-wire displacement sensors. Among them, the potentiometer is used as a contact measuring element, which has disadvantages such as easy wear and poor resolution. [0003] Chinese invention patent CN201610703931.7 proposes a pull-wire displacement sensor, which can measure the angle of the wire wheel through two Hall elements and a magnetic winding wheel, which can realize incremental measureme...

AI Technical Summary

Problems solved by technology

Among them, the potentiometer is used as a contact measuring element, which has the disadvantages of easy wear and poor resolution.

[0003] Chinese invention patent CN201610703931.7 proposes a pull-wire displacement sensor, which can measure the angle of the wire wheel through two Hall elements and a magnetic winding wheel, which can realize incremental measurement of displacement, but cannot achieve absolute measurement. In the event of a sudden power failure during the measurement, the starting point data will be lost, and you need to go back to the starting point to measure again

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