Stay wire type displacement sensor based on absolute coding

Abstract

The invention provides a stay wire type displacement sensor based on absolute coding. The displacement sensor comprises a shell, a winding unit and a coding unit; the shell is used for installing thewinding unit and the coding unit and plays a role in sealing; the winding unit is arranged in the shell and is used for winding a stay wire; the coding unit is arranged on the shell and the winding unit and is used for acquiring displacement signals. The absolute measurement of the stay wire displacement can be realized, and the application range is wider in comparison with the incremental measurement; the position of the winder can be automatically adjusted along a spline, the relation between the stay wire displacement and the corner of the winder does not need to be corrected in the later period, the measurement precision is high, the coded disc is convenient to process, and high-resolution coding 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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