Torque measurement sensor and measurement method based on photoelectric code disc signal phase difference

Abstract

The invention discloses a torque measuring sensor based on the phase difference of photoelectric code disc signals, which comprises a housing, in which an elastic transmission sleeve is installed through a ball bearing, the middle of the elastic transmission sleeve is an elastic link, and the two ends of the elastic link are respectively sleeved One photoelectric code disc, the central angles of the two photoelectric code discs are equal, the top of the housing is fixed with a mounting seat, and the photoelectric sensor A and photoelectric sensor B are fixed in the mounting seat, and the photoelectric sensor A and photoelectric sensor B are opposite to the two photoelectric code discs Setting; by setting two photoelectric code discs on both sides of the elastic link of the elastic transmission sleeve, the square wave output signal when the code disc rotates is respectively obtained by the two photoelectric sensors, and the elasticity can be realized according to the phase difference of the square wave signal output by the two code discs. Measurement of torsional deformation and torque of drive sleeves. The invention solves the problem that the existing torque sensor is easily affected by the interference of the magnetic field and the electric field on the measurement accuracy, has simple measurement principle, strong anti-interference ability, and can realize high dynamic and high-precision torque measurement of the transmission mechanism.

Description

technical field [0001] The invention belongs to the technical field of sensors, and relates to a torque measuring sensor based on the phase difference of a photoelectric code disc signal, and also relates to a measuring method of the torque measuring sensor. Background technique [0002] Torque is an important mechanical quantity in the operation process of mechanical transmission system and equipment. At present, in the technical field of torque measurement sensor for mechanical transmission system, the methods for realizing torque measurement can be roughly divided into the following types. [0003] (1) Magnetoelastic torque sensor: This sensor is made by using the piezomagnetic effect of ferromagnetic materials. The principle is to spray a layer of magnetoelastic material on the surface of the rotating shaft. Due to the piezoelectric effect, the elastic material induces a corresponding change in the surface magnetic field, and an induced electric potential proportional to...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a torque measurement sensor based on the phase difference of the photoelectric code disc signal, which solves the problem that the existing torque sensor is easily affected by the interference of magnetic field and electric field to the measurement accuracy

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