CN203432935U - High-sensitivity fluid medium capacitor sensing probe - Google Patents
High-sensitivity fluid medium capacitor sensing probe Download PDFInfo
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- CN203432935U CN203432935U CN201320451501.2U CN201320451501U CN203432935U CN 203432935 U CN203432935 U CN 203432935U CN 201320451501 U CN201320451501 U CN 201320451501U CN 203432935 U CN203432935 U CN 203432935U
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- sensing
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Abstract
The utility model provides a high-sensitivity fluid medium capacitor sensing probe which can form a fluid sensing capacitor of a capacitor full-bridge sensing circuit. The high-sensitivity fluid medium capacitor sensing probe comprises an installing main body which is utilized as a fluid sensing capacitor grounding electrode, wherein the installing main body is composed of a base body and a sealing cap which are made of same metal; the base body is matched with an installing opening in a fluid containing cavity in a sealing manner, and the sealing cap is fixedly sealed; two dielectric sensing pole plates utilized as the other electrode of the fluid sensing capacitor are parallel, base body installing holes which are symmetrically extended by taking the center of the base body as a center and an installing hole are sealed and fixed in an insulation manner, and dielectric sensing pole plate leads are led out the sealing cap in parallel. According to the technical scheme, the high-sensitivity fluid medium capacitor sensing probe provided by the utility model has the technical advantages that the sensing sensibility is improved, the assembly integration level is high, the volume is small, the high-sensitivity fluid medium capacitor sensing probe is carried and is connected with an external circuit interface, and the circuit combination is easy.
Description
Technical field
The utility model relates to the liquid medium impurity detection capacitive sensing probe of liquid impurities content in test fluid medium.
Background technology
Oily media water-bearing detection with oil pipeline is applied as example, existing capacitive sensing probe ubiquity complex structure, the technical matterss such as setting and debug difficulties are installed, the disclosed capacitor oil medium sensor of Chinese patent CN101050701, adopt and survey pole plate fluid media (medium) non-contact structure structure, in probe, concentrated transmission circuit, it exists induction sensitivity to be difficult to meet user demand, a little less than antijamming capability, and transmission circuit is partly placed in sensing probe, cause device volume large, the technical matters that induced signal output is easily disturbed, to installment and debugging, bring suitable technical difficulty equally.
Summary of the invention
Goal of the invention of the present utility model be to provide a kind of detect degree of accuracy high, be easy to install with the fluid chamber combination such as tested pipeline and the highly sensitive fluid media (medium) capacitive sensing probe of production debugging.The highly sensitive fluid media (medium) capacitive sensing probe technical scheme that the utility model provides, its main technical content is: a kind of highly sensitive fluid media (medium) capacitive sensing probe, this probe forms a fluid sensing capacitance of electric capacity full-bridge sensor circuit, comprise the installation main body as sensing fluid flow capacity earth electrode, main body is installed to be comprised of same metal matrix and closing cover, the construction opening of matrix and fluid chamber is sealed and matched, by the fastening encapsulation of closing cover, parallel and lean out matrix mounting hole with matrix revenue centre symmetry as two dielectric induction pole plates of another electrode of sensing fluid flow electric capacity, fix with mounting hole insulated enclosure, closing cover is drawn in the parallel connection of dielectric induction pole plate lead-in wire.
The disclosed highly sensitive fluid media (medium) capacitive sensing probe technical scheme of the utility model, the sensing that adopts dielectric induction pole plate to get involved fluid media (medium) becomes send formation, greatly improved its sensing sensitivity, it has, and assembling integrated level is high, volume is little, carry and be connected with external circuit interface, is easy to the technological merit that circuit combines.
Accompanying drawing explanation
Fig. 1 is cut-open view of final assembly of the present utility model.
Fig. 2 connects application to have change of the present utility model to send schematic diagram.
Fig. 3 is the A-A sectional structure chart of Fig. 1.
Embodiment
The disclosed highly sensitive fluid media (medium) capacitive sensing probe of the utility model, this probe has formed a fluid sensing capacitance C4 of electric capacity full-bridge sensor circuit one brachium pontis shown in Fig. 2, two reference capacitance C2, C3 forms the benchmark half-bridge of electric capacity full-bridge sensor circuit, its one end in parallel is power connector end, variable capacitance C1 and sensing fluid flow capacitor C 4 form the induction half-bridge of electric capacity full-bridge sensor circuit, two capacitor C 1, the parallel connected end ground connection of C4, two reference capacitance C2, the other end of C3 is in parallel with sensing fluid flow capacitor C 4 and variable capacitance C1 respectively, drawing as inputing to become send the change of chip 9 to send signal input part.This highly sensitive fluid media (medium) capacitive sensing probe is pressed to benchmark medium testing requirement balance zeroing electric capacity full-bridge sensor circuit, this highly sensitive fluid media (medium) capacitive sensing probe is applied in the detection of real fluid medium, its generation with the linear unbalance signal of detected fluid impurity information, through becoming, send chip to become to send output analyzing and processing.
The dielectric induction pole plate 1,4 of described sensing fluid flow capacitor C 4 is set in parallel in highly sensitive fluid media (medium) capacitive sensing probe.
Shown in Fig. 1 is a concrete structure of implementing of the highly sensitive fluid media (medium) capacitive sensing probe that provides of the utility model.This probe comprises the installation main body as described sensing fluid flow capacitor C 4 ground-electrodes, main body is installed to be comprised of same metal matrix 2 and closing cover 3, matrix 2 is sealed and matched with the construction opening 6 of fluid chamber 5, through bolt 10, by closing cover 3, matrix 2 and the 6 tight joint encapsulation of container mount pad, form the ground-electrode with respect to dielectric induction pole plate 1,4.Described dielectric induction pole plate 1,4 is parallel, and symmetrical centered by the center of matrix 2, lean out the mounting hole that is fixed on matrix 2, between two dielectric induction pole plates 1,4 and the mounting hole of matrix 2, uniform filling has insulation, corrosion-resistant, exotic material layer 7, the lead-in wire 8 of two dielectric induction pole plates 1,4 is drawn sealing cap 3 and is connected on a brachium pontis of electric capacity full-bridge sensor circuit, and the change number of delivering letters of electric capacity full-bridge sensor circuit is connected to become send chip 9.
Claims (2)
1. a highly sensitive fluid media (medium) capacitive sensing probe, this probe forms a fluid sensing capacitance (C4) of electric capacity full-bridge sensor circuit, comprise the installation main body as sensing fluid flow capacity earth electrode, main body is installed to be comprised of same metal matrix (2) and closing cover (3), the construction opening of matrix and fluid chamber (6) is sealed and matched, by the fastening encapsulation of closing cover, it is characterized in that the two dielectric induction pole plates (1 as another electrode of sensing fluid flow electric capacity, 4) parallel and lean out matrix mounting hole with matrix revenue centre symmetry, fix with mounting hole insulated enclosure, closing cover is drawn in the parallel connection of dielectric induction pole plate lead-in wire.
2. according to the highly sensitive fluid media (medium) capacitive sensing probe of claim 1, it is characterized in that sensing fluid flow electric capacity (C4) and variable capacitance (C1) form the induction half-bridge of described electric capacity full-bridge sensor circuit, two electric capacity (C1, C4) two parallel connected end ground connection, two reference capacitance (C2, C3) form the benchmark half-bridge of electric capacity full-bridge sensor circuit, reference capacitance (C2, C3) one end in parallel is power connector end, the other end of two reference capacitances respectively in parallel with sensing fluid flow electric capacity (C4) and variable capacitance (C1) lead to become send the change of chip (9) to send signal input part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320451501.2U CN203432935U (en) | 2013-07-25 | 2013-07-25 | High-sensitivity fluid medium capacitor sensing probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320451501.2U CN203432935U (en) | 2013-07-25 | 2013-07-25 | High-sensitivity fluid medium capacitor sensing probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203432935U true CN203432935U (en) | 2014-02-12 |
Family
ID=50061966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320451501.2U Expired - Fee Related CN203432935U (en) | 2013-07-25 | 2013-07-25 | High-sensitivity fluid medium capacitor sensing probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203432935U (en) |
-
2013
- 2013-07-25 CN CN201320451501.2U patent/CN203432935U/en not_active Expired - Fee Related
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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: 20140212 Termination date: 20150725 |
|
| EXPY | Termination of patent right or utility model |