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Electrostatic capacity type pressure sensor and sphygmomanometer with the same sensor

A pressure sensor and electrostatic capacitance type technology, applied in the field of sphygmomanometers, can solve the problems affecting the cost, accuracy and reliability of electronic sphygmomanometers, and achieve the effects of novel structure, stable circuit and gas path, and cost reduction

Active Publication Date: 2007-03-21
SHENZHEN KINGYIELD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus affecting the cost, accuracy and reliability of the electronic sphygmomanometer

Method used

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  • Electrostatic capacity type pressure sensor and sphygmomanometer with the same sensor
  • Electrostatic capacity type pressure sensor and sphygmomanometer with the same sensor
  • Electrostatic capacity type pressure sensor and sphygmomanometer with the same sensor

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1. An electrostatic capacitive pressure sensor, referring to FIGS. 3-7 , includes a sensor assembly 20 and a printed circuit board 21. The sensor assembly 20 includes a base assembly 201, an elastic body 202 that can be deformed by changes in pressure, and a The moving electrode 203 and the elastic body 202 are corrugated plates made of conductors.

[0034] Referring to Figures 3-5, the base assembly 201 is a hardware part integrating the gas nozzle 201c, the base 201b, and the movable electrode terminal 201a, and the gas nozzle 201c and the movable electrode terminal 201a extend outward from the base made. The corrugated plate 202 is welded and fixed to the base 201b, and the movable electrode 203 is welded and fixed to the corrugated plate 202. A closed air chamber 20a is formed by the base 201b and the corrugated plate 202, and the air inlet of the air nozzle 201c enters the airtight air chamber 20a. It is a flare with progressive enlargement and smooth t...

Embodiment 2

[0043] Embodiment 2, an electronic sphygmomanometer, with reference to Fig. 3-8, comprises air bag 30, pressure sensor 31, pressurization pump 34, air-hold pressure reducing valve 35, battery 38, voltage detection circuit 37, voltage stabilizing circuit 36, microprocessor device 32, display 33 and switch 39. Wherein, the air bag 30, the booster pump 34, the gas-hold pressure reducing valve 35, the battery 38, the voltage detection circuit 37, the voltage stabilizing circuit 36, the microprocessor 32, the display 33 and the switch 39 are known and mature technologies of the existing electronic sphygmomanometer, The pressure sensor adopts the capacitance type pressure sensor structure shown in Fig. 3-7, wherein the printed circuit board 21 is the main circuit board of the sphygmomanometer. The top of the gas nozzle 201c communicates with the air bag 30, and the static capacitance signal generated by the gas pressure change detected by the movable electrode 203 and the fixed elec...

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PUM

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Abstract

The invention discloses a preparation method of the static capacity pressure transducer. It makes the basement module by the conductor and integrates the air faucet, the basement and the movable electrode post head; then it makes the constant electrode on the copper foil of the etched circuit card. The method can improve the production precision and the reliability of the transducer; also it can decrease the cost. The invention also discloses an electric sphygmomanometer made by the static capacity pressure transducer.

Description

【Technical field】 [0001] The invention relates to an electrostatic capacitance type pressure sensor and a sphygmomanometer using the sensor. 【technical background】 [0002] At present, the pressure sensors used in electronic sphygmomanometers are divided into two types, one is semiconductor silicon pressure sensors, and the other is electrostatic capacitive pressure sensors. [0003] A typical electrostatic capacitive pressure sensor, such as the Japanese invention patent: manufacturing method of electrostatic capacitive pressure sensor, JP-6-307959, is shown in Figure 1 and Figure 2 . The structure of the capacitive pressure sensor proposed by this invention is as follows: a base 10, a metal gas nozzle 11 fixed on the base, a corrugated plate 12 fixed on the base, placed approximately parallel to the fixed electrode plate and welded (soldering tin 13) On the movable electrode plate 14 of the corrugated plate, the movable electrode plate terminal 18 welded to the base and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L9/12A61B5/022
Inventor 章年平
Owner SHENZHEN KINGYIELD TECH
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