CN104101689B - Humidity sensor - Google Patents
Humidity sensor Download PDFInfo
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- CN104101689B CN104101689B CN201410351484.4A CN201410351484A CN104101689B CN 104101689 B CN104101689 B CN 104101689B CN 201410351484 A CN201410351484 A CN 201410351484A CN 104101689 B CN104101689 B CN 104101689B
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- encapsulating compound
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- dew cell
- wiring board
- filter paper
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Abstract
The present invention relates to a kind of humidity sensor, comprise wiring board, dew cell, internal layer encapsulating compound, internal layer filter paper, outer encapsulating compound, metal shell and outer filter paper; Dew cell is located on wiring board, and internal layer encapsulating compound is coated on wiring board, and makes dew cell be revealed in internal layer encapsulating compound, and internal layer filter paper adheres on dew cell; Outer encapsulating compound is coated on internal layer encapsulating compound, and makes dew cell be revealed in outer encapsulating compound; Metal shell is coated on outer encapsulating compound, metal shell is provided with a perforate, dew cell be positioned at perforate under, outer filter paper adheres on the opening part of perforate, and being positioned at internal layer filter paper top, humidity sensor can reach dustproof, waterproof and low temperature resistant effect by said structure.
Description
Technical field
The present invention relates to a kind of sensor, relate in particular to a kind of humidity sensor.
Background technology
Tradition humidity sensor, in departments such as industrial and agricultural production, meteorology, environmental protection, national defence, scientific research, space flight, often need to be measured and control ambient humidity. But in conventional ambient parameter, humidity is a parameter of difficult Measurement accuracy.
Humidity sensor is the data that gather moisture in air by dew cell, feeds back to central processing unit by digital analogue signal, takes the measures such as a series of dehumidifying, humidification according to the humidity situation of testing environment, makes its environment reach perfect condition.
General design is now: for the airborne humidity of accurate detection, in the time of testing environment humidity, dew cell wants long term exposure in environment to be measured, because the linearity of dew cell and resistance tocrocking are poor, be easy to contaminated and affect its certainty of measurement and long-time stability, add low temperature, steam freeze etc. factor, traditional humidity sensor is very easily impaired.
Therefore be necessary to design a kind of new humidity sensor, to overcome the problems referred to above.
Summary of the invention
The object of the invention is to overcome the defect of prior art, a kind of dustproof, waterproof and low temperature resistant humidity sensor are provided.
The present invention is achieved in that
The invention provides a kind of humidity sensor, comprise wiring board, dew cell, internal layer encapsulating compound, internal layer filter paper, outer encapsulating compound, metal shell and outer filter paper; Described dew cell is located on described wiring board, and described internal layer encapsulating compound is coated on described wiring board, and makes described dew cell be revealed in described internal layer encapsulating compound, and described internal layer filter paper adheres on described dew cell; Described outer encapsulating compound is coated on described internal layer encapsulating compound, and makes described dew cell be revealed in described outer encapsulating compound; Described metal shell is coated on described outer encapsulating compound, and described metal shell is provided with a perforate, described dew cell be positioned at described perforate under, described outer filter paper adheres on the opening part of described perforate, and is positioned at described internal layer filter paper top.
Further, described wiring board and described internal layer encapsulating compound are one-body molded, and described outer encapsulating compound and described internal layer encapsulating compound are one-body molded.
Further, two metal sleeves penetrate described wiring board, described internal layer encapsulating compound, described outer encapsulating compound and described metal shell simultaneously.
Further, two described metal sleeves are symmetricly set in the both sides of described wiring board, and one-body molded with described internal layer encapsulating compound.
Further, the acquisition port of described dew cell outside is provided with waterproof grommet.
Further, described internal layer encapsulating compound is provided with two-layer ring-type fin, and described waterproof grommet is located between two-layer ring-type fin, and described dew cell is located at the center of described ring-type fin.
Further, multiple PVC wires are connected with described wiring board, and the position that described PVC wire contacts with described metal shell is arranged with waterproof coil.
Further, the bottom of described outer encapsulating compound is provided with foam-rubber cushion.
Further, described internal layer encapsulating compound top is provided with multiple projections.
The present invention has following beneficial effect:
Described dew cell is connected with wiring board, and one-body molded with described internal layer encapsulating compound, again at the outer encapsulating compound of described internal layer encapsulating compound outer cladding, finally metal shell is coated on to described outer encapsulating compound, internal layer filter paper and outer filter paper are located on dew cell, thereby described dew cell is coated completely, makes described humidity sensor there is dustproof, waterproof and low temperature resistant effect.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The cutaway view of the humidity sensor that Fig. 1 provides for the embodiment of the present invention;
The three-dimensional exploded view of the humidity sensor that Fig. 2 provides for the embodiment of the present invention;
The stereogram of the humidity sensor that Fig. 3 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment. Based on the embodiment in the present invention, all other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, belong to the scope of protection of the invention.
As Fig. 1 to Fig. 3, the embodiment of the present invention provides a kind of humidity sensor, comprises wiring board 9, dew cell 8, internal layer encapsulating compound 7, internal layer filter paper 5, outer encapsulating compound 3, metal shell 2 and outer filter paper 1.
As Fig. 1 to Fig. 3, described dew cell 8 is located on described wiring board 9, and described internal layer encapsulating compound 7 is coated on described wiring board 9, and makes described dew cell 8 be revealed in described internal layer encapsulating compound 7, and described wiring board 9 is one-body molded with described internal layer encapsulating compound 7, that is to say employing injection mo(u)lding. Described internal layer filter paper 5 adheres on described dew cell 8. Wherein, described internal layer encapsulating compound 7 tops are provided with multiple projections (illustrating, not label), position when facilitating injection molding.
As Fig. 1 to Fig. 3, described outer encapsulating compound 3 is coated on described internal layer encapsulating compound 7, and makes described dew cell 8 be revealed in described outer encapsulating compound 3, and wherein, described outer encapsulating compound 3 is one-body molded with described internal layer encapsulating compound 7.
As Fig. 1 to Fig. 3, described metal shell 2 is coated on described outer encapsulating compound 3, wherein, described metal shell 2 is stainless steel casing, described metal shell 2 is provided with a perforate (illustrating, not label), described dew cell 8 be positioned at described perforate under, described outer filter paper 1 adheres on the opening part of described perforate, and is positioned at described internal layer filter paper 5 tops. The acquisition port outside of described dew cell 8 is provided with waterproof grommet 6, described internal layer encapsulating compound 7 is provided with two-layer ring-type fin and (illustrates, not label), described waterproof grommet 6 is located between two-layer ring-type fin, and described dew cell 8 is located at the center of described ring-type fin. Described waterproof grommet 6 is also folded between described outer encapsulating compound 3 and described metal shell 2 simultaneously.
As Fig. 1 to Fig. 3, described humidity sensor also has two metal sleeves 4, two metal sleeves 4 penetrate described wiring board 9, described internal layer encapsulating compound 7, described outer encapsulating compound 3 and described metal shell 2 simultaneously, two described metal sleeves are symmetricly set in the both sides of described wiring board 9, and one-body molded with described internal layer encapsulating compound 7, that is to say employing injection mo(u)lding, for described wiring board 9, described internal layer encapsulating compound 7, described outer encapsulating compound 3 and described metal shell 2 are connected.
As Fig. 1 to Fig. 3, in addition, the bottom of described outer encapsulating compound 3 is provided with foam-rubber cushion 10, for increasing cushioning effect. Multiple PVC wires 12 are connected with described wiring board 9, and described PVC wire 12 is arranged with waterproof coil 11 with the position that described metal shell 2 contacts, and for anti-sealing entry-line plate 9, thereby have ensured the normal work of dew cell 8.
As Fig. 1 to Fig. 3, the assembling process of described humidity sensor is as follows: dew cell 8 is welded on wiring board 9, two metal sleeves 4 are through in the hole of wiring board 9 both sides, make internal layer encapsulating compound 7 encase wiring board 9 and dew cell 8 by low-pressure injection molding, by out exposed the acquisition port of dew cell 8, again the internal layer filter paper 5 of waterproof and breathable is attached to the acquisition port place of dew cell 8, and then place it in metal shell 2, and around dew cell 8 acquisition port, place described waterproof grommet 6, finally make outer encapsulating compound 3 encase internal layer encapsulating compound 7 by low-pressure injection molding, make described internal layer encapsulating compound 7 by two metal sleeves 4, described outer encapsulating compound 3 and metal shell 2 are connected, and outer filter paper 1 is adhered on to the opening part of metal shell 2, thereby make described humidity sensor reach dustproof, waterproof, low temperature resistant effect.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. a humidity sensor, is characterized in that, comprises wiring board, dew cell, internal layer encapsulating compound, internal layer filter paper, outer encapsulating compound, metal shell and outer filter paper;
Described dew cell is located on described wiring board, and described internal layer encapsulating compound is coated on described wiring board, and makes described dew cell be revealed in described internal layer encapsulating compound, and described internal layer filter paper adheres on described dew cell;
Described outer encapsulating compound is coated on described internal layer encapsulating compound, and makes described dew cell be revealed in described outer encapsulating compound;
Described metal shell is coated on described outer encapsulating compound, and described metal shell is provided with a perforate, described dew cell be positioned at described perforate under, described outer filter paper adheres on the opening part of described perforate, and is positioned at described internal layer filter paper top;
The acquisition port outside of described dew cell is provided with waterproof grommet;
Described internal layer encapsulating compound is provided with two-layer ring-type fin, and described waterproof grommet is located between two-layer ring-type fin, and described dew cell is located at the center of described ring-type fin;
Described wiring board and described internal layer encapsulating compound are one-body molded, and described outer encapsulating compound and described internal layer encapsulating compound are one-body molded;
Two metal sleeves penetrate described wiring board, described internal layer encapsulating compound, described outer encapsulating compound and described metal shell simultaneously;
Two described metal sleeves are symmetricly set in the both sides of described wiring board, and one-body molded with described internal layer encapsulating compound.
2. humidity sensor as claimed in claim 1, is characterized in that: multiple PVC wires are connected with described wiring board, and the position that described PVC wire contacts with described metal shell is arranged with waterproof coil.
3. humidity sensor as claimed in claim 1, is characterized in that: the bottom of described outer encapsulating compound is provided with foam-rubber cushion.
4. humidity sensor as claimed in claim 1, is characterized in that: described internal layer encapsulating compound top is provided with multiple projections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410351484.4A CN104101689B (en) | 2014-07-23 | 2014-07-23 | Humidity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410351484.4A CN104101689B (en) | 2014-07-23 | 2014-07-23 | Humidity sensor |
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| Publication Number | Publication Date |
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| CN104101689A CN104101689A (en) | 2014-10-15 |
| CN104101689B true CN104101689B (en) | 2016-05-11 |
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| CN201410351484.4A Active CN104101689B (en) | 2014-07-23 | 2014-07-23 | Humidity sensor |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106871973A (en) * | 2017-04-21 | 2017-06-20 | 佛山市川东磁电股份有限公司 | A kind of Temperature Humidity Sensor |
| CN113514508A (en) * | 2020-04-10 | 2021-10-19 | 北京中科银河芯科技有限公司 | Humidity sensor and humidity detection device |
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| US20100156663A1 (en) * | 2008-12-19 | 2010-06-24 | Honeywell International Inc. | Radiosonde having hydrophobic filter comprising humidity sensor |
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