CN215910385U - Capacitance electrode structure, capacitance electrode and soil humidity sensor - Google Patents
Capacitance electrode structure, capacitance electrode and soil humidity sensor Download PDFInfo
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- CN215910385U CN215910385U CN202021506231.7U CN202021506231U CN215910385U CN 215910385 U CN215910385 U CN 215910385U CN 202021506231 U CN202021506231 U CN 202021506231U CN 215910385 U CN215910385 U CN 215910385U
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Abstract
The utility model discloses a capacitor electrode structure which comprises a first electrode layer and a second electrode layer, wherein an interlayer is arranged between the first electrode layer and the second electrode layer, the first electrode layer is sequentially provided with a first protective outer layer, a second protective outer layer and a plate electrode from outside to inside according to interlayer distribution, and the second electrode layer is sequentially provided with a third protective outer layer, a fourth protective outer layer and a plate electrode from outside to inside according to interlayer distribution. In addition, the utility model also discloses a capacitor electrode which is provided with the capacitor electrode structure. In addition, the utility model also discloses a soil humidity sensor, which comprises: the lower end of the shell is provided with a tip part which is V-shaped; the capacitance electrode is arranged in the tip part and is connected with the humidity measuring circuit.
Description
Technical Field
The present invention relates to a capacitor electrode structure and a device having the same, and more particularly, to a capacitor electrode.
Background
The soil humidity sensor is a sensor for detecting the water content of soil, and has great significance for soil moisture content monitoring, agricultural irrigation and forestry protection. The soil moisture sensor mainly uses an FDR (frequency Domain reflectometry) frequency Domain reflection principle to detect soil moisture, and specifically, the soil moisture sensor measures the apparent dielectric constant of soil according to the propagation frequency of electromagnetic waves in a medium by using an electromagnetic pulse principle, so as to obtain the relative water content of the soil.
At present, a soil humidity sensor mainly adopts a resistance type method and an inductance type method.
Resistive applications detect changes in resistivity of electrodes inserted into the soil, thus requiring the electrodes to contact the soil. The electrode material is easily corroded and has short service life.
The capacitance type adopts a method for detecting the dielectric constant inserted around the soil electrode, because the capacitance polar plate is replaced by the copper sheet of the PCB, the direct contact of the electrode is avoided, but because the capacitance polar plate still needs to be in contact with the soil, the service life is also influenced by the relation of the coating.
In addition, the capacitance electrodes of the sensors mainly adopted in the prior art are protected by paint.
SUMMERY OF THE UTILITY MODEL
One of the objectives of the present invention is to provide a capacitor electrode structure, in which a plurality of protective layers are disposed to protect the capacitor electrode from corrosion, so as to prolong the service life of the capacitor electrode.
In order to achieve the above object, the present invention provides a capacitor electrode structure, which includes a first electrode layer and a second electrode layer, wherein an interlayer is disposed between the first electrode layer and the second electrode layer, the first electrode layer is sequentially provided with a first protective outer layer, a second protective outer layer and an electrode plate from outside to inside according to interlayer distribution, and the second electrode layer is sequentially provided with a third protective outer layer, a fourth protective outer layer and an electrode plate from outside to inside according to interlayer distribution.
In the technical solution of the present invention,
further, in the capacitor electrode structure of the present invention, the spacer layer includes a glass fiber plate.
Further, in the capacitor electrode structure of the present invention, the second protective outer layer and the fourth protective outer layer comprise glass fiber plates.
Further, in the capacitor electrode structure of the present invention, the first protective outer layer and the third protective outer layer include copper sheets.
Further, in the capacitor electrode structure, the copper sheet surface layer is provided with an anti-corrosion layer.
In the above scheme, the anti-corrosion layer may be formed by coating paint or by using a non-metal armor method, and the above method is a conventional technique known to those skilled in the art, and therefore, the description thereof is omitted here.
Accordingly, another object of the present invention is to provide a capacitor electrode, which has the above capacitor electrode structure.
Further, it is still another object of the present invention to provide a soil moisture sensor, comprising:
the lower end of the shell is provided with a tip part which is V-shaped;
the capacitance electrode is arranged in the tip part and is connected with the humidity measuring circuit.
Further, in the soil moisture sensor according to the present invention, the housing is made of epoxy resin.
In the soil humidity sensor, a sensing element is a humidity sensitive capacitor, and a metal oxide or a high molecular polymer is conventionally used. The materials have strong adsorption capacity to water molecules, the quantity of adsorbed water changes along with the change of the environmental humidity, and the capacitance value of a capacitance device changes due to the fact that the water molecules have large electric dipole moment and the permittivity of the materials changes after water absorption. The change of the capacitance value is converted into an electric signal, and then the humidity can be monitored.
However, the prior art has the defects that the prior protective layer is thin and is easily corroded or scratched by soil, and the service life is greatly shortened.
Based on the above, in order to prolong the service life and protect the electrode, the inventor designs a capacitor electrode with a multilayer interlayer structure, and the electrode plate is wrapped and protected by a plurality of protective layers, so that the electrode is effectively protected and prevented from being corroded by contacting air or soil.
The electrode plate may preferably be a PCB electrode plate.
In some embodiments, it may be preferable to set the thickness of the copper skin to 1oz, i.e., the thickness achieved when 1oz of copper is laid evenly over a 1 square foot area.
In addition, it should be noted that the glass fiber board used in the present application is known to those skilled in the art, and therefore, the detailed description thereof is omitted.
Compared with the prior art, the capacitance electrode structure, the capacitance electrode and the soil humidity sensor have the advantages and beneficial effects as follows:
1. the capacitor electrode structure is simple and ingenious in structure, and the electrode plates in the first electrode layer and the second electrode layer are protected through the simple and ingenious interlayer structure design, so that the service life of the capacitor electrode with the capacitor electrode structure and the service life of the soil humidity sensor are prolonged.
2. The soil humidity sensor has the advantages of small volume, simple installation, operation and maintenance, capability of being directly inserted into soil for use, capability of timely, sensitively and efficiently detecting soil moisture in real time, convenient portability, strong applicability, low cost, wide application range and stable and reliable performance.
Drawings
FIG. 1 is a schematic structural diagram of a capacitor electrode according to an embodiment of the present invention;
FIG. 2 schematically illustrates an interlayer structure of a capacitor electrode according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a soil moisture sensor according to an embodiment of the present invention.
Detailed Description
The wireless rf device with vertical tag and the system thereof according to the present invention will be further explained with reference to the drawings and the detailed description of the specification, but the explanation should not be construed as an inappropriate limitation to the technical solution of the present invention.
Fig. 1 is a schematic structural diagram of a capacitor electrode according to an embodiment of the present invention. Fig. 2 schematically shows an interlayer structure of a capacitor electrode according to an embodiment of the present invention.
As shown in fig. 1, and referring to fig. 2 as necessary, in the present embodiment, the capacitor electrode adopts a capacitor electrode structure including: the electrode comprises a first protective outer layer 11, a second protective outer layer 12, a first electrode plate 13, an interlayer 14, a second electrode plate 15, a fourth protective outer layer 16 and a third protective outer layer 17, wherein the interlayer 14 is made of glass fiber plates.
In addition, the first outer protection layer 11, the second outer protection layer 12 and the first electrode plate 13 form a first electrode layer, the first outer protection layer 11 is made of copper sheets, the surface layers of the copper sheets are coated with paint, the thickness of the copper sheets is 1oz, and the second outer protection layer 12 is made of glass fiber plates.
In addition, second electrode board 15, fourth protection outer layer 16 and third protection outer layer 17 have constituted the second electrode layer, and third protection outer layer 17 adopts the copper sheet, and this copper sheet outer layer coating has the paint, and copper sheet thickness is 1oz, and fourth protection outer layer 16 adopts the glass fiber board.
As can be seen with further reference to fig. 2, the second electrode plate 15 has a slot 150, and the slot 150 is shaped to fit the shape of the first electrode plate 13.
FIG. 3 is a schematic structural diagram of a soil moisture sensor according to an embodiment of the present invention.
As shown in fig. 3, and referring to fig. 1 and 2 as necessary, in the present embodiment, the soil moisture sensor includes a housing 2, the housing 2 is made of epoxy resin, the lower end of the housing 2 has a tip portion 21, and the tip portion 21 is in a V shape; the capacitance electrode is accommodated in the space in the tip portion 21, and the capacitance electrode is connected to the humidity measuring circuit.
As to the specific structure of the capacitor electrode, reference may be made to fig. 1 and fig. 2, and the capacitor electrode is connected to a humidity measuring circuit, the humidity measuring circuit includes an operational amplifier and a single chip, the arrangement structure and the working principle of the humidity measuring circuit are known to those skilled in the art, and the working principle of the humidity measuring circuit is as follows: the capacitance value of the capacitance electrode is influenced by soil humidity to form a resonance circuit, the capacitance value of the resonance circuit is influenced by the capacitance value, so that the voltage value obtained by the resonance circuit is influenced, the voltage value becomes a voltage signal which can be identified by a single chip machine through an operational amplifier, and the voltage signal is inversely related to the soil humidity, so that the humidity measurement of the soil humidity sensor through the scheme is realized.
Therefore, when the soil humidity sensor in the present embodiment is inserted in soil, soil humidity measurement is realized by a change in capacitance of the capacitive electrode.
In conclusion, the capacitor electrode structure is simple and ingenious in structure, the electrode plates in the first electrode layer and the second electrode layer are protected through the simple and ingenious interlayer structure design, and the service life of the capacitor electrode with the capacitor electrode structure and the service life of the soil humidity sensor are prolonged.
In addition, the soil humidity sensor has the advantages of small volume, simple installation, operation and maintenance, capability of being directly inserted into soil for use, capability of timely, sensitively and efficiently detecting soil moisture in real time, convenient portability, strong applicability, low cost, wide application range and stable and reliable performance.
It should be noted that the prior art in the protection scope of the present invention is not limited to the examples given in the present application, and all the prior art which is not inconsistent with the technical scheme of the present invention, including but not limited to the prior patent documents, the prior publications and the like, can be included in the protection scope of the present invention.
In addition, the combination of the features in the present application is not limited to the combination described in the claims of the present application or the combination described in the embodiments, and all the features described in the present application may be freely combined or combined in any manner unless contradictory to each other.
It should also be noted that the above-mentioned embodiments are only specific embodiments of the present invention. It is apparent that the present invention is not limited to the above embodiments and similar changes or modifications can be easily made by those skilled in the art from the disclosure of the present invention and shall fall within the scope of the present invention.
Claims (8)
1. The utility model provides a capacitance electrode structure, its characterized in that, capacitance electrode structure includes first electrode layer and second electrode layer, be equipped with the interlayer between first electrode layer and the second electrode layer, wherein, first electrode layer is according to distribution from outer to interior first protection skin, second protection skin and the plate electrode of being equipped with in proper order between the layer, and the second electrode layer is according to distribution from outer to interior third protection skin, fourth protection skin and the plate electrode of being equipped with in proper order between the layer.
2. The capacitive electrode structure of claim 1, wherein the separator layer comprises a fiberglass sheet.
3. The capacitive electrode structure of claim 1, wherein the second and fourth protective outer layers comprise fiberglass sheets.
4. The capacitive electrode structure of claim 1 wherein the first and third protective outer layers comprise copper sheets.
5. The capacitive electrode structure of claim 4, wherein a surface layer of the copper sheet has an anti-corrosion layer.
6. A capacitive electrode, characterized in that the capacitive electrode has a capacitive electrode structure according to any one of claims 1-5.
7. A soil moisture sensor, wherein the soil moisture sensor comprises:
the lower end of the shell is provided with a tip part which is V-shaped;
the capacitive electrode of claim 6 disposed within the tip portion, the capacitive electrode being connected to a moisture sensing circuit.
8. The soil moisture sensor of claim 7 wherein said housing is an epoxy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021506231.7U CN215910385U (en) | 2020-07-27 | 2020-07-27 | Capacitance electrode structure, capacitance electrode and soil humidity sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021506231.7U CN215910385U (en) | 2020-07-27 | 2020-07-27 | Capacitance electrode structure, capacitance electrode and soil humidity sensor |
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| CN215910385U true CN215910385U (en) | 2022-02-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117388331A (en) * | 2023-10-27 | 2024-01-12 | 福建天成宝得智能科技有限公司 | Capacitive soil humidity detection device and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117388331A (en) * | 2023-10-27 | 2024-01-12 | 福建天成宝得智能科技有限公司 | Capacitive soil humidity detection device and system |
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