CN202748187U - Capacitive pressure transducer - Google Patents
Capacitive pressure transducer Download PDFInfo
- Publication number
- CN202748187U CN202748187U CN 201220312735 CN201220312735U CN202748187U CN 202748187 U CN202748187 U CN 202748187U CN 201220312735 CN201220312735 CN 201220312735 CN 201220312735 U CN201220312735 U CN 201220312735U CN 202748187 U CN202748187 U CN 202748187U
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- CN
- China
- Prior art keywords
- holder
- pole piece
- pressure transducer
- minute
- reed
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a capacitive pressure sensor, and belongs to the field of the sensor technology. The capacitive pressure sensor comprises a rounded fixed base, a micro pressure reed, a lower pole sheet and an upper pole sheet, wherein a through hole is formed in the center of the fixed base; the micro pressure reed is adhered to the fixed base through a glue; a groove is arranged in the center of the micro pressure spring sheet to correspond to the through hole; the lower pole sheet is welded on the micro pressure reed; at least three bosses are arranged on the fixed base; and the upper pole sheet is fixed on the bosses through a fastener. The beneficial effects are that the capacitive pressure transducer is rapid to mount and more convenient to produce, is lower in cost, compact in structure and longer in service life, and is suitable for an electronic sphygmomanometer and a vacuum digital display meter.
Description
[technical field]
The utility model relates to sensor technical field, and in particular, the utility model relates to a kind of capacitance pressure transducer.
[background technology]
The sensor that uses in the electronic sphygmomanometer at present is mainly semi-conductor electricity resistive sensor, semi-conductor electricity resistive sensor bulk is little, the linearity good, semi-conductor electricity resistive sensor adopts bridge architecture, constant voltage or constant current-supplying, pressure-acting is on voltage dependent resistor (VDR), cause resistance variations, thereby result from the pressure differential of pressure linear dependence, after amplifier amplifies, convert digital signal to and processed by MCU.The relative line cost of the method is higher, and complex circuit is high to power requirement, a little less than the antijamming capability.In addition, some capacitance type sensors have also appearred now, but the sensor of these kinds, the ubiquity cost is relatively high, the problem that serviceable life is short.Present vacuum meter mostly is the mechanical indicating pointer formula in addition, and the vacuum meter of digital display is expensive, as adopts this type of capacitance type sensor to realize that by circuit vacuum pressure shows, will reduce greatly cost, aspect vacuum technology, will plug a gap.
[utility model content]
The purpose of this utility model is effectively to overcome the deficiency of above-mentioned technology, and a kind of capacitance pressure transducer, that substitutes traditional semi-conductor electricity resistive sensor is provided, and cost of the present utility model is low, and is linear stable, long service life.
The technical solution of the utility model is achieved in that it comprises the holder of a circle, the holder medium position is provided with a through hole, its improvements are: it also comprises a minute-pressure reed, an inferior pole piece and a superior pole piece, described minute-pressure reed is attached on the holder by glue, minute-pressure reed medium position is provided with a groove corresponding to through hole, and described inferior pole piece is welded on the minute-pressure reed; Described holder is provided with at least three boss, and described superior pole piece is fixed on the described boss by securing member;
In the said structure, connect an electrode connecting piece on the described minute-pressure reed, and this electrode connecting piece is fixed on the holder by a reference column with tapering;
In the said structure, described holder is provided with three boss, is provided with screw in described boss;
In the said structure, described securing member is screw, and superior pole piece cooperates by screw and screw, is fixed on the described boss; Described superior pole piece is provided with at least one electricity connection end;
In the said structure, described holder is provided with at least one limited post;
In the said structure, described holder is provided with two limited posts;
In the said structure, be provided with two spacing holes corresponding to two limited posts on the holder on the described superior pole piece;
In the said structure, the thickness of described superior pole piece is 0.2mm;
In the said structure, the thickness of described minute-pressure reed is 0.06-0.1mm, and its diameter is 15.5-16.5mm;
In the said structure, the measurement range of this capacitance pressure transducer, is-700-700mmHg that error is ± 3mmHg.
The beneficial effects of the utility model are: the utility model is attached on the minute-pressure reed on the holder by glue, and inferior pole piece is welded on the minute-pressure reed, so that installation process is quick, it is more convenient to produce, and automatically changes into Du Genggao, so its cost is lower; In addition, holder of the present utility model is provided with boss, and boss is provided with screw, and superior pole piece cooperates by screw and screw, is fixed on the boss of holder, and therefore compact conformation of the present utility model is linear stable, long service life.
[description of drawings]
Fig. 1 is exploded perspective view of the present utility model.
[embodiment]
The utility model will be further described below in conjunction with drawings and Examples.
With reference to shown in Figure 1, the utility model has disclosed a kind of capacitance pressure transducer,, this sensor comprises the holder 1 of a circle, holder 1 medium position is provided with a through hole 11, through hole 11 is used for connecting snorkel 12, the utility model also comprises a minute-pressure reed 2, one inferior pole piece 3 and a superior pole piece 4, minute-pressure reed 2 is attached on the holder 1 by glue, and minute-pressure reed 2 medium positions are provided with groove 21 corresponding to through hole 11, inferior pole piece 3 is welded on the minute- pressure reed 2, and 2 of minute-pressure reeds keep good electrical connection, and 3 of minute-pressure reed 2 and inferior pole pieces are completely non-false welding, the gas that from snorkel 12, enters, pass through hole 11 after, act on minute-pressure reed 2, be transmitted to again on the inferior pole piece 3; Be electrically connected an electrode connecting piece 5 on the minute-pressure reed 2, an end of this electrode connecting piece 5 is fixed on the holder 1.In the present embodiment, the thickness of minute-pressure reed 2 is 0.06-0.1mm, and diameter is 15.5-16.5mm.
Holder 1 is provided with at least three boss 13, in the present embodiment, be provided with three boss 13, and boss 13 is provided with screw 14, therefore, superior pole piece 3 cooperates by three screws 6 and screw 14, be fixed on the boss 13 of holder 1, and superior pole piece 4 is provided with three electricity connection ends 41, in the present embodiment, the thickness of superior pole piece 4 is 0.2mm.Also be provided with at least one limited post 15 on the holder 1, in the present embodiment, be provided with two limited posts 15, correspondingly on the superior pole piece 4 be provided with two spacing holes 42, when installing, can superior pole piece 4 be installed on the boss 13 of holder 1 according to the cooperating of spacing hole 42 and limited post 15, installation process is quick, after this, by cooperating of screw 6 and screw 14 and cooperating of limited post 15 and spacing hole 42, so that superior pole piece 4 firmly is fixed on the boss 13 of holder 1 its compact conformation.
According to above-mentioned narration, electrode connecting piece 5 is connected to external circuit with the electricity connection end 41 of superior pole piece 4, when gas acts on the minute-pressure reed 2, so that inferior pole piece 3 protrudes, distance between inferior pole piece 3 and the superior pole piece 4 changes, thereby cause that the electric capacity pests occurrence rule between superior pole piece 3, the inferior pole piece 4 changes, and after this processes via external circuit.Measurement range of the present utility model is-700-700mmHg that error is ± 3mmHg that it is simple in structure, cost is low, long service life.
Described above only is preferred embodiment of the present utility model, and above-mentioned specific embodiment is not to restriction of the present utility model.In technological thought category of the present utility model, various distortion and modification can appear, and the retouching that all those of ordinary skill in the art make according to above description, revise or be equal to replacement, all belong to the scope that the utility model is protected.
Claims (10)
1. capacitance pressure transducer,, it comprises the holder of a circle, the holder medium position is provided with a through hole, it is characterized in that: it also comprises a minute-pressure reed, an inferior pole piece and a superior pole piece, described minute-pressure reed is attached on the holder by glue, minute-pressure reed medium position is provided with a groove corresponding to through hole, and described inferior pole piece is welded on the minute-pressure reed; Described holder is provided with at least three boss, and described superior pole piece is fixed on the described boss by securing member.
2. capacitance pressure transducer, according to claim 1 is characterized in that: connect an electrode connecting piece on the described minute-pressure reed, and this electrode connecting piece is fixed on the holder by a reference column with tapering.
3. capacitance pressure transducer, according to claim 1, it is characterized in that: described holder is provided with three boss, is provided with screw in described boss.
4. capacitance pressure transducer, according to claim 1, it is characterized in that: described securing member is screw, superior pole piece cooperates by screw and screw, is fixed on the described boss; Described superior pole piece is provided with at least one electricity connection end.
5. capacitance pressure transducer, according to claim 1, it is characterized in that: described holder is provided with at least one limited post.
6. capacitance pressure transducer, according to claim 5, it is characterized in that: described holder is provided with two limited posts.
7. capacitance pressure transducer, according to claim 6 is characterized in that: be provided with two spacing holes corresponding to two limited posts on the holder on the described superior pole piece.
8. capacitance pressure transducer, according to claim 1, it is characterized in that: the thickness of described superior pole piece is 0.2mm.
9. capacitance pressure transducer, according to claim 1, it is characterized in that: the thickness of described minute-pressure reed is 0.06-0.1mm, its diameter is 15.5-16.5mm.
10. capacitance pressure transducer, according to claim 1 is characterized in that: the measurement range of this capacitance pressure transducer, is-700-700mmHg, and error is ± 3mmHg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220312735 CN202748187U (en) | 2012-06-29 | 2012-06-29 | Capacitive pressure transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220312735 CN202748187U (en) | 2012-06-29 | 2012-06-29 | Capacitive pressure transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202748187U true CN202748187U (en) | 2013-02-20 |
Family
ID=47707565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220312735 Expired - Fee Related CN202748187U (en) | 2012-06-29 | 2012-06-29 | Capacitive pressure transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202748187U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389108A (en) * | 2013-07-30 | 2013-11-13 | 谢虹 | Electronic pedometer |
| CN107843379A (en) * | 2017-12-13 | 2018-03-27 | 沈阳市传感技术研究所 | The capacitive pressure transducer of assembled fixed electrode |
| WO2018122698A1 (en) * | 2016-12-28 | 2018-07-05 | Tubitak | High accuracy pressure transducer with improved temperature stability |
-
2012
- 2012-06-29 CN CN 201220312735 patent/CN202748187U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389108A (en) * | 2013-07-30 | 2013-11-13 | 谢虹 | Electronic pedometer |
| WO2018122698A1 (en) * | 2016-12-28 | 2018-07-05 | Tubitak | High accuracy pressure transducer with improved temperature stability |
| US10996124B2 (en) | 2016-12-28 | 2021-05-04 | Tubitak | High accuracy pressure transducer with improved temperature stability |
| CN107843379A (en) * | 2017-12-13 | 2018-03-27 | 沈阳市传感技术研究所 | The capacitive pressure transducer of assembled fixed electrode |
| CN107843379B (en) * | 2017-12-13 | 2023-09-22 | 沈阳市传感技术研究所 | Capacitive pressure sensor with assembled fixed electrode |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130220 Termination date: 20140629 |
|
| EXPY | Termination of patent right or utility model |