Torsion sensor

Abstract

The invention relates to a torsion sensing system based on a pressure strain material, in particular to a sensor for transferring torsional force or torque for detection in a large-load torsional force working environment. The torsion sensor provided in the invention comprises a center shaft and a sleeve, wherein grooves are formed at the circumference of the center shaft at intervals in the axial direction of the center shaft; a projection is formed between the adjacent grooves; connecting racks are alternately arranged on the projections; the center shaft is sleeved to the sleeve through the connecting racks; a fastening element is arranged on the sleeve so that the sleeve can be fixedly connected with the center shaft through the fastening element; a pressure strain material body is arranged in each groove and the two sides of the pressure strain material body are in contact with the walls of the groove, respectively; and one side of the pressure strain material body is fixedly connected to the projection. The torsion sensor provided in the invention is capable of bearing huge torsion and torque loads and keeping the consistency of forward and reverse torsion sensing signals, and is simple in structure and convenient for connection with a system to be measured. The torsion sensor is also especially suitable for the application fields requesting small structure size, high torsional strength requirement, and simple and convenient mounting.

Description

technical field [0001] The invention relates to a torsion sensor system based on a pressure-strain material, in particular to a sensor for detecting and transmitting torsion force or torque under a large-load torsion force working environment. Background technique [0002] The field of sensors has developed rapidly, resulting in a variety of sensors such as pressure change, piezoresistive and piezoelectric. Especially in recent years, piezoelectric sensors have developed rapidly. The principle of the piezoelectric sensor is based on the piezoelectric effect of some crystal materials. The widely used piezoelectric materials are quartz and lead pertitanate. When these crystals are mechanically deformed by pressure, the two opposite sides Opposite charges are generated on the sides, which is the "piezoelectric effect". Since the piezoelectric sensor is made based on the force-electric strong coupling effect of this piezoelectric material, the intensity of the mechanical load ...

AI Technical Summary

Problems solved by technology

Therefore, the use of compressive strain sensing materials also limits the application of such materials or their devices in high torque or large torque pressure sensing due to their strength defects.

[0003] Moreover, since the tensile and piezoelectric properties of strain sensing materials are often different, such as forward and reverse bidirectional torque or torque sensors made of a single piezoelectric material, there are often inconsistencies in the sensing signals, and the forward and reverse torque or The large deviation of the torque measurement range makes it difficult to manufacture forward and reverse bidirectional torque or torque sensors

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