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Movable electrode of variable capacitor, pressure sensor and blood pressure measuring equipment

A pressure sensor and moving electrode technology, used in fluid pressure measurement using capacitance change, variable capacitors, pressure sensors, etc., can solve problems affecting sensor linearity, distance error, parallelism error, etc., to improve production efficiency and assembly. Simple process and high installation accuracy

Active Publication Date: 2011-03-02
SHENZHEN KINGYIELD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned prior art, due to the small size of the corrugated plate and the movable electrode, the difficulty of welding between the corrugated plate and the movable electrode directly affects the improvement of the production efficiency of the sensor.
In addition, the soldering error between the corrugated plate and the movable electrode may cause the parallelism error and distance error between the fixed electrode and the movable electrode of the sensor, which affects the linearity of the sensor and thus affects the accuracy of the sensor

Method used

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  • Movable electrode of variable capacitor, pressure sensor and blood pressure measuring equipment
  • Movable electrode of variable capacitor, pressure sensor and blood pressure measuring equipment
  • Movable electrode of variable capacitor, pressure sensor and blood pressure measuring equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A movable electrode of a variable capacitor, such as Figure 4 and Figure 5 As shown, it includes a plate-shaped pressure sensing part 101 , an elastic deformation part 102 and a fixing part 103 provided in the radial direction of the pressure sensing part 101 . The pressure sensing part 101, the elastic deformation part 102 and the fixing part 103 are integral structures processed at one time. The thickness of the pressure sensing part 101 should ensure that when the axial force of the pressure sensing part 101 does not exceed a preset value, the pressure sensing part 101 will not be deformed or the deformation will not exceed the allowable range. The shape of the section (A-A) of the elastic deformation part 102 has a curved structure. Compared with the pressure sensing part 101, the thickness of the elastic deformation part 102 is processed into a thin structure as far as possible, so that when the pressure sensing part 101 is axially stressed, The elastic deforma...

Embodiment 2

[0056] Another movable electrode of a variable capacitor, combined with Figure 6 and Figure 7 , including a pressure sensing part 201 , an elastic deformation part 202 and a fixing part 203 . The difference between this embodiment and Embodiment 1 is that the cross-sectional shape of the elastic deformation portion 202 is different: the cross-sectional shape of the elastic deformation portion 102 in Embodiment 1 is an outwardly convex curve (that is, the elastic deformation portion 102 is an outwardly convex curved surface) ), while the cross-sectional shape of the elastic deformation portion 202 in this embodiment is a concave curve (that is, the elastic deformation portion 202 is a concave curved surface). Other structures and manufacturing methods are the same as in Embodiment 1.

[0057] Those skilled in the art can understand that, in order to make the elastic deformation part elastically deform when it is stressed, the elastic deformation part can adopt the combinati...

Embodiment 3

[0059] Yet another movable electrode of a variable capacitor, combined with Figure 8 and Figure 9 , including a pressure sensing part 301 , an elastic deformation part 302 and a fixing part 303 . The difference between this embodiment and the first embodiment is that the cross-sectional shape of the elastic deformation part 302 is different: in this embodiment, the cross-sectional shape of the elastic deformation part 302 is a stepped structure. When making the elastic deformation part 302, the part to be processed is punched into a stepped structure. Other structures and manufacturing methods are the same as in Embodiment 1.

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Abstract

The invention discloses a movable electrode of a variable capacitor, which comprises a platy pressure sensing part and an elastic deformation part arranged in the radial direction of the platy pressure sensing part, wherein the pressure sensing part and the elastic deformation part are connected together; and when the force is applied to the pressure sensing part in the axial direction, the elastic deformation part can generate corresponding deformation to enable the pressure sensing part to move along the axial direction. The invention also discloses an electrode device adopting the movable electrode, a pressure sensor and a pressure gauge adopting the pressure sensor and a manufacturing method thereof. By adopting the invention, the pressure sensor has fewer parts, simpler assembly processes, higher production efficiency and lower manufacturing cost.

Description

【Technical field】 [0001] The invention relates to a movable electrode of a variable capacitor, an electrostatic capacitance type pressure sensor and blood pressure measuring equipment. It specifically relates to a movable electrode, an electrode device, a pressure sensor and a manometer using the pressure sensor of an electrostatic capacity type pressure sensor, and is especially suitable for measuring blood pressure. 【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] Typical electrostatic capacitive pressure sensors, such as Japanese invention patent: manufacturing method of electrostatic capacitive pressure sensors, JP-P-6-307959, such as figure 1 shown. The capacitive pressure sensor proposed by this invention includes a base 10, an air nozzle 11 and a corrugated plate 12 fixed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G5/011G01L9/12G01L7/02A61B5/022
CPCA61B5/021G01L9/0072G01L9/0044G01L19/148H01G5/16A61B2562/0247A61B2562/0214Y10T29/49117
Inventor 章年平
Owner SHENZHEN KINGYIELD TECH
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