Shear Strain Pressure Sensor

Abstract

A shear strain type pressure sensor, comprising a housing, the magnetic field generating device in the housing has two opposite magnetic poles and corresponding to each other, a shearing plate is arranged in the space between the two magnetic poles, and the shearing plate One side of the shear plate is fixed with a rubber sheet, which is in full contact with the magnetic end surface of the first magnetic pole of the two magnetic poles, and the other side of the shear plate is fixed with a first electrode, and the first electrode is fixed with a magnetorheological Elastic body, the other side of the magnetorheological elastic body is fixed with a second electrode, the second electrode is fixed to the magnetic pole surface of the second magnetic pole in the two magnetic poles, the first electrode, the second electrode and a signal conditioning module Electrically connected, one end of the shearing plate extends upwards through an S-shaped force-measuring member and then protrudes from the upper surface of the housing, and the housing is fixed with a support plate for supporting the S-shaped force-measuring member. A stopper is arranged on the plate, and the lower end surface of the stopper is in contact with the upper end surface of the S-shaped force-measuring piece. It has high resolution, high sensitivity and large force range.

Description

technical field [0001] The invention relates to a pressure sensor, in particular to a shear strain type pressure sensor. Background technique [0002] Pressure sensor is the most commonly used sensor in industrial practice. It is widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemical, oil wells, electric power, ships, machine tools , pipeline and many other industries. Traditional pressure sensors are mainly based on mechanical structural devices, and the deformation of elastic elements is used to indicate pressure, but this structure is large in size and heavy in weight, and cannot provide electrical output. With the development of new material technology, new sensors also emerge as the times require. Piezoelectric pressure sensors use the piezoelectric effect of piezoelectric materials to convert t...

AI Technical Summary

Problems solved by technology

However, the piezoelectric pressure sensor still has the following disadvantages: its resolution is low, it is not sensitive to small strains, it cannot respond well to the measurement of small force values, the range of force measurement needs to be improved, and the pressure of the piezoelectric pressure sensor Electrical materials are greatly affected by the environment, which can easily lead to inaccurate measurement of piezoelectric pressure sensors

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