CN103728351A - Novel soil moisture sensor - Google Patents
Novel soil moisture sensor Download PDFInfo
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- CN103728351A CN103728351A CN201210383999.3A CN201210383999A CN103728351A CN 103728351 A CN103728351 A CN 103728351A CN 201210383999 A CN201210383999 A CN 201210383999A CN 103728351 A CN103728351 A CN 103728351A
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Abstract
The invention relates to a novel soil moisture sensor, which comprises a sensing probe formed by a plate capacitor, the input terminal of the sensing probe is connected to an oscillation signal generator, the output terminal is connected to a demodulation unit, the output of the demodulation unit is connected to an isolation amplifier, the output of the isolation amplifier is connected to a rectification unit, the output of the rectification unit is connected to a microprocessor, and the microprocessor is connected to a display and a wireless communication module. The soil moisture sensor can obtain the water content in soil in a real time mode, the measure result is accurate and stable, and the soil moisture sensor is suitable for soil in most regions in our country, the cost is low, and the soil moisture sensor enables popularization and usage at each region.
Description
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Technical field
The present invention relates to soil moisture content detection technique field, particularly a kind of novel soil moisture sensor.
Background technology
In modern agriculture, very high to irrigating requirement, should guarantee water requirements of crops, can not make Moisture high UCL again simultaneously, because Moisture high UCL had both been wasted resource, waste power, again the growth of crop is had to reverse impact.Measuring washiness is at present rule of thumb, also there is methods such as adopting titrimetry, weight method to measure, but these methods all need to sample, according to the water cut of sampling, weigh water cut in whole soil, this is both inaccurate, Real-time Obtaining parameter online again, be only a kind of laboratory facilities, have universal the type sensor abroad, can use, but its price is very expensive, can not in China peasant household, promote the use of.And external portable detector can not adapt to the soil regime of China well.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of novel soil moisture sensor, there is feature easy to use simple in structure.
To achieve these goals, the technical solution used in the present invention is:
A kind of novel soil moisture sensor, comprise the sensing probe that capacity plate antenna forms, sensing probe input termination oscillation signal generator, output termination detection unit, the output of detection unit connects every straight amplifier, output every straight amplifier connects rectification unit, and the output of rectification unit connects microprocessor, and microprocessor connects display and wireless communication module.
Compared with prior art, the present invention can Real-time Obtaining soil in water cut, measurement result accurate stable, be applicable to the soil in the most areas of China, and cost is very low, can promote the use of in each department.
Accompanying drawing explanation
Accompanying drawing is structural representation of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is carried out to more detailed explanation.
As shown in the figure, the present invention is a kind of novel soil moisture sensor, comprise the sensing probe that capacity plate antenna forms, sensing probe input termination oscillation signal generator, output termination detection unit, the output of detection unit connects every straight amplifier, every the output of straight amplifier, connects rectification unit, the output of rectification unit connects microprocessor, and microprocessor connects display and wireless communication module.
The principle of capacity plate antenna sensing probe of the present invention is: in electric field; soil particle can be polarized; after polarization; the positive charge producing moves to a side; negative charge moves to a contrary side; the polarization of soil particle is relevant with the specific inductive capacity of soil, and specific inductive capacity is determined by the characteristic of material, the specific inductive capacity difference of different material.The specific inductive capacity of soil, air and moisture is: water: 80; Soil particle: 4; Air: 1.The specific inductive capacity of water is maximum, so the variation of water cut will cause the variation of specific inductive capacity, and change in dielectric constant causes soil capacitance variations, and the changing value that therefore detects this electric capacity just can obtain the situation of change of soil moisture content.
The course of work of the present invention is, oscillation signal generator produces high-frequency signal, add on capacity plate antenna sensing probe, the real-time output of probe obtains the voltage signal changing by detection, after straight amplification, rectifying and wave-filtering, A/D conversion, microprocessor is to this voltage signal sampling and calculate corresponding change of moisture content.
Claims (1)
1. a novel soil moisture sensor, it is characterized in that, comprise the sensing probe that capacity plate antenna forms, sensing probe input termination oscillation signal generator, output termination detection unit, the output of detection unit connects every straight amplifier, every the output of straight amplifier, connects rectification unit, the output of rectification unit connects microprocessor, and microprocessor connects display and wireless communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210383999.3A CN103728351A (en) | 2012-10-11 | 2012-10-11 | Novel soil moisture sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210383999.3A CN103728351A (en) | 2012-10-11 | 2012-10-11 | Novel soil moisture sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103728351A true CN103728351A (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210383999.3A Pending CN103728351A (en) | 2012-10-11 | 2012-10-11 | Novel soil moisture sensor |
Country Status (1)
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| CN (1) | CN103728351A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181765A (en) * | 2015-10-22 | 2015-12-23 | 杭州创辉农业科技有限公司 | Soil humidity sensor |
| CN106645314A (en) * | 2016-12-29 | 2017-05-10 | 中环天仪（天津）气象仪器有限公司 | Fault diagnosis device for FDR (Frequency Domain Reflectiometry) tube type soil moisture sensor and detection method |
| CN117347592A (en) * | 2023-10-24 | 2024-01-05 | 福建天成宝得智能科技有限公司 | Soil humidity detection device and system |
-
2012
- 2012-10-11 CN CN201210383999.3A patent/CN103728351A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181765A (en) * | 2015-10-22 | 2015-12-23 | 杭州创辉农业科技有限公司 | Soil humidity sensor |
| CN106645314A (en) * | 2016-12-29 | 2017-05-10 | 中环天仪（天津）气象仪器有限公司 | Fault diagnosis device for FDR (Frequency Domain Reflectiometry) tube type soil moisture sensor and detection method |
| CN106645314B (en) * | 2016-12-29 | 2023-10-03 | 中环天仪（天津）气象仪器有限公司 | Fault diagnosis device and detection method for FDR tubular soil moisture sensor |
| CN117347592A (en) * | 2023-10-24 | 2024-01-05 | 福建天成宝得智能科技有限公司 | Soil humidity detection device and system |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140416 |