Paddy field moisture sensor
A sensor and moisture technology, applied in instruments, analytical materials, scientific instruments, etc., can solve problems such as the difficulty of reducing the cost of signal processing circuits
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[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0022] There are impurities in the water in the paddy field, both dielectric and conductive particles. The electrodes inserted into the water can be equivalent to an RC parallel circuit. When the difference in water quality is not significant, the resistivity and dielectric coefficient of water are constant. The resistance value of the equivalent resistance of the electrode is inversely proportional to the depth of the electrode in the water, and the capacity of the equivalent capacitance is proportional to the depth of the electrode in the water. Measuring the RC change of this electrode can measure the depth of the electrode in the water. If the lower end of the electrode is close to the soil, the height of the paddy field water layer can be measured.
[0023] Paddy field soil contains moisture and impurities, among which water has important dielectrics and...
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