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Membrane type hydrostatic pressure sensor

A hydrostatic pressure and sensor technology, applied in the direction of fluid pressure measurement involving the displacement of the magnet, can solve the problems of affecting the flow state of the water, not adapting to the underwater test environment, low test accuracy, etc., achieving easy automatic control, light weight, high resolution good rate

Inactive Publication Date: 2011-11-23
HEFEI UNIV OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

These existing pressure gauges generally have problems such as low test accuracy, unsuitability for underwater test environments, large volumes that affect water flow patterns, or inability to directly output electrical signals for automatic control.

Method used

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  • Membrane type hydrostatic pressure sensor
  • Membrane type hydrostatic pressure sensor
  • Membrane type hydrostatic pressure sensor

Examples

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Embodiment Construction

[0028] see Figure 2A , Figure 2B with Figure 2C , the structural form of the membrane hydrostatic pressure sensor 24 in the present embodiment is:

[0029] The machine cap 1, the fuselage 2 and the bottom cover 3 are located on the same central axis, and are screwed together to form a cylindrical body; wherein, the machine cap 1 is in the shape of a round cap, has an internal thread structure, and has a through hole on the top; The outer periphery of 2 is located in the middle section and is provided with a hexagonal shoulder 5, so that the sensor 24 is installed, the two ends of the fuselage 2 are set as external thread segments, and the outer periphery of the fuselage 2 near the end where the cap 1 is located is provided with a water-stop rubber ring. 6 and a nut 7 for fixing the sensor 24.

[0030] The cylinder is divided into two chambers in the axial direction by the elastic membrane 8 arranged on the cross-section of the fuselage, one is a pressure chamber communic...

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Abstract

The invention discloses a membrane type hydrostatic pressure sensor which is characterized in that a machine cap, a machine body and a bottom cover in threaded connection constitute a cylinder body and a through hole is formed at the top of the machine cap; the cylinder body is divided into two cavities along the axial direction by an elastic membrane arranged on the cross section of the machine body, one is a pressed cavity communicated with a measured pressure environment, the other one is a detection cavity communicated with atmosphere, a modulation plate is arranged in the detection cavity and separated from the elastic membrane, and a ventilation hole is formed on the modulation plate; and a magnetic steel block is arranged at the center of the elastic membrane, a Hall element is arranged on the modulation plate in the corresponding position, the Hall element and the magnetic steel block constitute a Hall sensor, and a Hall detection signal of the Hall sensor is used as an output signal of the hydrostatic pressure sensor. The membrane type hydrostatic pressure sensor is suitable for an underwater environment and can directly output an electrical signal so as to facilitate real-time online services with a computer data processing system.

Description

technical field [0001] The invention relates to a sensing device for testing hydrostatic pressure, in particular to a membrane hydrostatic pressure sensor. Background technique [0002] At present, liquid column type, elastic type and electric pressure gauge are usually used to test the liquid pressure. Liquid column manometers use glass tubes and scales, and are tested by manual reading; elastic manometers use pressure gauges, spring tubes, etc. to measure pressure; electrical manometers use strain gauges, capacitance, inductance and other test methods. These existing pressure gauges generally have problems such as low test accuracy, inability to adapt to underwater test environments, large volumes that affect water flow patterns, or inability to directly output electrical signals for automatic control. Contents of the invention [0003] The present invention provides a membrane hydrostatic pressure sensor in order to avoid the disadvantages of the above-mentioned prior ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L9/14
Inventor 汪哲荪方炎松逄焕平戴习民许磊
Owner HEFEI UNIV OF TECH
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