Novel soil moisture sensor
A soil moisture and sensor technology, applied in the direction of material capacitance, etc., can solve the problems of high price, impact on crop growth, promotion and use of farmers, etc., and achieve low cost, accurate and stable measurement results
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[0009] The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.
[0010] As shown in the figure, the present invention is a new type of soil moisture sensor, including a sensing probe composed of a flat plate capacitor, the input end of the sensing probe is connected to an oscillating signal generator, the output end is connected to a detection unit, and the output of the detection unit is connected to a DC blocking amplifier , the output of the DC blocking amplifier is connected to the rectification unit, the output of the rectification unit is connected to the microprocessor, and the microprocessor is connected to the display and the wireless communication module.
[0011] The principle of the flat capacitive sensing probe of the present invention is: in the electric field, soil particle can be polarized, and after polarization, the positive charge that produces moves to one side, and negative charge moves to ...
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