Limited diaphragm guide type underwater pressure sensor

Abstract

The invention discloses a limited diaphragm guide type underwater pressure sensor, and belongs to the technical field of sensors. The limited diaphragm guide type underwater pressure sensor comprises a housing and a rolling diaphragm, wherein the housing is internally divided into two chambers through the rolling diaphragm, and the rolling diaphragm is in sealing connection with the inner wall of the housing; a pressure sensor and a pressure difference sensor are respectively arranged on the inner part of a compressing chamber and a housing wall of the compressing chamber; a tray which is clung to the rolling diaphragm is arranged at the lower end of the rolling diaphragm; a guide supporting rod, which extends from the housing and is glidingly connected with the housing, is connected to the middle part of the tray; a step, which is mounted against the inner wall of the housing, is arranged at the guide supporting rod; a limiting plate is arranged at one inner side of the compressing chamber, close to the rolling diaphragm; through holes are distributed in the limiting plate. With the adoption of the limited diaphragm guide type underwater pressure sensor, two kinds of pressure are respectively measured, and thus the measuring precision is improved; the rolling diaphragm is used for balancing the water pressure; in addition, the tray drives the diaphragm to compress toward the compressing chamber, and meanwhile, the guiding supporting rod is used for guiding, the movement deformation of the rolling diaphragm is limited to be within a certain range through the limiting plate, and therefore, the diaphragm is greatly prevented from being damaged under a large pressure difference.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a limit-type diaphragm-guided underwater pressure sensor. Background technique [0002] Underwater pressure sensors are widely used in ocean detection such as tide detection and underwater robot operating position determination. For the detection of underwater pressure in the ocean, especially the detection of high pressure in the deep sea environment, the sensor must be able to withstand and measure the large water pressure in the deep sea. Pressure, but also can measure small changes in water pressure, which is a difficult problem faced by existing seabed pressure detection. Existing sensors have large measurement errors for small changes in water pressure. Contents of the invention [0003] The object of the present invention is to provide a limited-diaphragm-guided underwater pressure sensor that can withstand the measurement of large pressure and accurately measure small p...

AI Technical Summary

Problems solved by technology

[0002] Underwater pressure sensors are widely used in ocean detection such as tide detection and underwater robot operating position determination. For the detection of underwater pressure in the ocean, especially the detection of high pressure in the deep sea environment, the sensor must be able to withstand and measure the large water pressure in the deep sea. pressure, and can measure small changes in water pressure. This is a difficult problem faced by existing submarine pressure detection. Existing sensors have large measurement errors for small changes in water pressure.

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