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A self-confirming magnetic liquid micro-pressure differential sensor

A micro differential pressure sensor and magnetic liquid technology, applied in the field of sensors, can solve the problems of inability to evaluate the working state of the sensor, and the failure of the micro differential pressure sensor cannot be eliminated in time, so as to achieve the effect of ensuring safe production.

Inactive Publication Date: 2016-08-24
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention: the magnetic liquid micro-pressure difference sensor cannot evaluate the working state of the sensor itself, and the problem that cannot be eliminated in time when the micro-pressure difference sensor fails

Method used

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  • A self-confirming magnetic liquid micro-pressure differential sensor
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Embodiment Construction

[0021] to attach figure 1 , 2 The present invention will be further described for the specific embodiment:

[0022] A self-confirming magnetic liquid micro pressure difference sensor, the device includes: a transparent glass tube 1, a first cylindrical hollow permanent magnet 2-1, a second cylindrical hollow permanent magnet 2-2, and a first induction coil 3-1 , second induction coil 3-2, first magnetic liquid ring 4-1, second magnetic liquid ring 4-2, first cylindrical permanent magnet 5-1, second cylindrical permanent magnet 5-2, iron core 6 , the first limiter 7-1, the second limiter 7-2, the infrared distance sensor 8, the subtractor 9.

[0023] Connections between the parts of the device:

[0024] Wind high-strength enamelled copper wires evenly, symmetrically, and with equal turns to both ends of the transparent glass tube 1 to form the first induction coil 3-1 and the second induction coil 3-2 respectively; the first cylindrical hollow permanent Magnet 2-1 and first...

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Abstract

The invention discloses a self-confirmation type magnetic liquid micro differential pressure sensor which is suitable for micro differential pressure measurement. The device comprises a transparent glass tube (1), a first cylindrical hollow permanent magnet (2-1), a second cylindrical hollow permanent magnet (2-2), a first induction coil (3-1), a second induction coil (3-2), a first magnetic liquid ring (4-1), a second magnetic liquid ring (4-2), a first cylindrical permanent magnet (5-1), a second cylindrical permanent magnet (5-2), an iron core (6), a first limiter (7-1), a second limiter (7-2), an infrared range sensor (8) and a subtractor (9). The first cylindrical permanent magnet (5-1), the second cylindrical permanent magnet (5-2) and the iron core (6) commonly compose a composite magnetic core. The self-confirmation type magnetic liquid micro differential pressure sensor moves in the range limited by the limiters, the real-time estimation on the working state of the magnetic liquid micro differential pressure sensor is achieved under the action of the infrared range sensor (8) and the subtractor (9), and accurate measurement and safety production are ensured.

Description

technical field [0001] The invention belongs to the field of sensors and is suitable for micro pressure difference measurement. Background technique [0002] At present, there are two main structural forms of the magnetic liquid differential pressure sensor. One is the U-shaped tube-type magnetic liquid differential pressure sensor. When the alternating current is input and the resistance of the external circuit forms a bridge circuit, when there is a pressure difference, the liquid surface of the two arms of the U-shaped plexiglass tube produces a height difference Δh, and then the coil inductance L changes, and the balance of the bridge is destroyed. The measured value through the external circuit The voltage change is then obtained to obtain the pressure difference change. This type of magnetic liquid micro-pressure difference sensor has a weaker output signal and a larger volume; the other is an iron-core magnetic liquid micro-pressure difference sensor, such as patents ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L13/04
Inventor 李德才谢君
Owner BEIJING JIAOTONG UNIV
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