CN1009863B - Dewing sensor - Google Patents
Dewing sensorInfo
- Publication number
- CN1009863B CN1009863B CN 88102294 CN88102294A CN1009863B CN 1009863 B CN1009863 B CN 1009863B CN 88102294 CN88102294 CN 88102294 CN 88102294 A CN88102294 A CN 88102294A CN 1009863 B CN1009863 B CN 1009863B
- Authority
- CN
- China
- Prior art keywords
- humidity
- present
- substrate
- electrode
- sensitive film
- Prior art date
- 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
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Abstract
The present invention relates to a humidity sensor which can sense environmental dewing. The present invention is formed by the principle that capacitance on device surfaces can be notably changed under the high-humidity condition that the relative humidity is from 95 to 100%. The present invention is composed of a ceramic substrate, a metal comb-shaped electrode, a high molecular humidity sensing film, a conducting leading wire, etc. The present invention has the advantages of simple structure, reliable performance, small size, etc. and is particularly suitable for electric devices, such as video recorders, etc.
Description
The invention belongs to humidity-sensitive element senser element field.
At present, the humidity-sensitive element sensor normally uses in relative humidity 5～95% scopes.As disclosed CN85104273 Chinese patent on Dec 3rd, 1986 " humidity-sensitive element and autofrettage thereof ", be to form hydrophobic organic compound plasma polymerization macromolecule layer between the pair of electrodes on the solid substrate or at least one electrode, and adhere to the macromolecule layer that contains amino thereon, introduce ammonium salt type hydrophilic radical by amino and constitute.This humidity-sensitive element only is applicable under the condition of relative humidity 5～95%, can not work under the dewfall condition.
Purpose of the present invention provides a kind ofly when relative humidity reaches 95～100%, can obviously feel wet sensor, because the dewfall phenomenon occurs this moment, so become condensation sensor.
Condensation sensor of the present invention is made up of substrate, electrode, humidity-sensitive film and conductive lead wire.Substrate is rectangle or circular thin ceramic or quartz glass plate.Side surface at substrate is coated with the pair of metal comb electrode, the material of electrode gold, palladium-silver or silver.Containing on the part substrate of comb electrode, be coated with last layer and have hygroscopic macromolecule humidity-sensitive film, adopting pure base polymer or acetal-based resin.Weld the metal lead wire of conduction respectively in the lower end of two electrodes.
Principle of work of the present invention is when utilizing the environment dewfall, and the water capacity on the surface of condensation sensor increases suddenly, has greatly changed the dielectric coefficient of humidity-sensitive film, makes two interelectrode electric capacitys that sudden variation take place, thereby realizes detecting the purpose of dewfall.
The present invention has simple in structure, and volume is little, and the dewfall induction is sensitive, stable performance, and easy to use, the life-span is long, advantages such as low price.Applicable to electronic equipments such as video recorders, fill up this technological gap of China.
Below in conjunction with drawings and Examples the present invention is described further.
Fig. 1 is the condensation sensor structural representation;
Fig. 2 is the A-A cut-open view of Fig. 1;
Fig. 3 is relative humidity-electric capacity (or frequency, voltage) performance diagram of condensation sensor.
By Fig. 1,2 as seen, substrate 1 is a rectangle, is of a size of 12 * 8 millimeters, and thickness is 0.3～0.5 millimeter, and material is a pottery.Side surface at substrate is coated with a pair of comb electrode 2, and the material of electrode adopts gold, is being coated with on the part substrate of comb electrode, adopts pure base polymer system humidity-sensitive film 3, at the lower end of two electrodes, and 0.2～0.3 square millimeter copper conductor 4 in the soldering.
As seen from Figure 3, in temperature-10 ℃～+ 60 ℃ scope, when relative humidity was 0～95%, curve had the characteristic that is parallel to axis of abscissa; When relative humidity was 85～95%, family curve was slight curving, but not clearly; When relative humidity 95～100%, significantly sudden change appears in characteristic slope, illustrates that its capacitance characteristic has marked change.
Claims (2)
1, a kind of humidity-sensitive element sensor, form by substrate, electrode, humidity-sensitive film and conductive lead wire, it is characterized in that substrate is rectangle or circular pottery or quartz glass thin slice, side surface at substrate is coated with a pair of metal comb electrode with gold, palladium-silver or silvery, containing on the part substrate of comb electrode, be coated with last layer and have hygroscopic macromolecule humidity-sensitive film, at two electrode lower end welding conductive lead wires.
2, humidity-sensitive element sensor as claimed in claim 1 is characterized in that the humidity-sensitive film material is pure base polymer or acetal-based resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88102294 CN1009863B (en) | 1988-04-28 | 1988-04-28 | Dewing sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88102294 CN1009863B (en) | 1988-04-28 | 1988-04-28 | Dewing sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN88102294A CN88102294A (en) | 1988-10-12 |
| CN1009863B true CN1009863B (en) | 1990-10-03 |
Family
ID=4832097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88102294 Expired CN1009863B (en) | 1988-04-28 | 1988-04-28 | Dewing sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1009863B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300575C (en) * | 2004-12-29 | 2007-02-14 | 浙江大学 | High molecular resistance type thin film humidity sensitive element with interpenetrating network structure and fabricating method thereof |
| CN101378934B (en) * | 2006-03-08 | 2012-01-11 | 利奥波德·科世达责任有限股份公司 | Camera arrangement for a motor vehicle |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034769C (en) * | 1991-11-19 | 1997-04-30 | 电子科技大学 | Non-linear moisture sensor |
| CN1301404C (en) * | 2001-03-13 | 2007-02-21 | Tdk株式会社 | Humidity sensor element and method for manufacture thereof |
| US7208962B2 (en) | 2003-09-19 | 2007-04-24 | Tengchen Sun | Device and method for detecting the environment change of windshield |
| CN100451634C (en) * | 2005-04-07 | 2009-01-14 | 福华电子股份有限公司 | Dew sensor and manufacturing method thereof |
| EP2336758B1 (en) * | 2009-12-16 | 2012-08-29 | Nxp B.V. | Capacitive sensor |
| CN103207213A (en) * | 2013-03-21 | 2013-07-17 | 王競逸 | Moisture condensation detecting device |
| CN103529093A (en) * | 2013-11-01 | 2014-01-22 | 中国气象局气象探测中心 | Capacitance type moisture condensation sensor |
| CN108512045A (en) * | 2018-04-02 | 2018-09-07 | 国网宁夏电力有限公司中卫供电公司 | A kind of condensation detection sweep-out method and device |
-
1988
- 1988-04-28 CN CN 88102294 patent/CN1009863B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300575C (en) * | 2004-12-29 | 2007-02-14 | 浙江大学 | High molecular resistance type thin film humidity sensitive element with interpenetrating network structure and fabricating method thereof |
| CN101378934B (en) * | 2006-03-08 | 2012-01-11 | 利奥波德·科世达责任有限股份公司 | Camera arrangement for a motor vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN88102294A (en) | 1988-10-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |