Underwater pressure sensor based on magneto-rheological effect

Abstract

The invention relates to an underwater pressure sensor based on a magneto-rheological effect. The underwater pressure sensor is composed of an upper shell, a second O-shaped ring, a magnet exciting coil, a bolt, a nut, a first elastic body, a third polar plate, a second polar plate, a first polar plate, a positioning block, a lower shell, a framework, a third elastic body, a second elastic body, aprotective sleeve, a power-on wire, a current controller, a fourth polar plate, a push plate and a first O-shaped ring. The upper shell and the lower shell are connected through the bolt and the nut;the positioning block is mounted at the lower shell, and the framework is mounted at the upper part of the positioning block; the framework is provided with the magnet exciting coil and the protective sleeve; the push plate is in clearance fit with the upper shell, and first-stage sealing is carried out through the first O-shaped ring; and the push plate is arranged on the fourth polar plate, andsecondary sealing is carried out through the second O-shaped ring. The sensor has the advantages that the manufacturing cost is low, the piezoresistive effect of the magneto-rheological elastomer isutilized, the pressure calibration range is wider, and certain accuracy can be improved.

Description

technical field [0001] The invention relates to a pressure sensor, in particular to an underwater pressure sensor based on the magneto-rheological effect. Background technique [0002] With the acceleration of the pace of human exploration of the ocean, the research on ocean measurement and sensing technology has become more and more important, and the accurate measurement of water depth position is one of the research focuses. The underwater pressure sensor is an important device for measuring water depth and is widely used in underwater robots or submarine equipment, and the sensor must not only be able to measure the large pressure in the deep sea, but also be able to measure small changes in water pressure. However, the existing sensors on the market have the problem of large pressure measurement errors for complex underwater pressure environments, which cannot meet the requirements of use. Magnetorheological elastomers not only have variable stiffness and controllable ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an underwater pressure sensor based on the magneto-rheological effect, which can solve the problem of not only measuring the high pressure in the deep sea, but also measuring the small changes in the underwater pressure

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