Soil humidity detection method and device
A technology of soil moisture and detection method, which is applied in radio wave measurement system, using microwave to test moisture content, instruments, etc. It can solve the problems of low detection efficiency, insufficient comprehensive and diverse reflection information, and slow detection speed of soil moisture.
Active Publication Date: 2021-09-10
NANJING UNIV
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[0005] In order to solve the problem of using the frequency domain reflection method to detect soil moisture, it is necessary to use electromagnetic pulses of a specific frequency band, single frequency signals or multi-frequency signals as sweeping signals to perform frequency domain reflection detection on the soil. The frequency information is fixed, and the reflection information obtained is not comprehensive and diverse enough to achieve the effect of continuous measurement, resulting in the problem of slow detection of soil moisture and low detection efficiency. This application discloses a soil moisture detection method and its device
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[0058] In order to solve the problem of using the frequency domain reflection method to detect soil moisture, it is necessary to use electromagnetic pulses of a specific frequency band, single frequency signals or multi-frequency signals as sweeping signals to perform frequency domain reflection detection on the soil. The frequency information is fixed, and the reflection information obtained is not comprehensive and diverse enough to achieve the effect of continuous measurement, resulting in the problem of slow detection of soil moisture and low detection efficiency. This application discloses a soil moisture detection method and its device.
[0059] The first embodiment of the present application discloses a soil moisture detection method. The soil moisture detection method is applied to a soil moisture detection device. The soil moisture detection device includes a soil container, a millimeter wave radar and a data capture module, wherein, The soil container and the millime...
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The invention discloses a soil humidity detection method and device, the device comprises a soil container, a millimeter wave radar, a data capture module, a signal transmitting antenna and a signal receiving antenna, the signal transmitting antenna transmits a linear frequency modulation transmitting signal to a soil surface, and the signal receiving antenna obtains a linear frequency modulation reflection signal; the millimeter wave radar combines the two signals into an orthogonal signal, and performs frequency conversion processing to obtain an intermediate frequency suppression signal; and the data capture module carries out merging processing on the intermediate frequency suppression signals and carries out fast Fourier transform to obtain a frequency domain atlas, the frequency domain atlas reflects reflection energy information of the soil surface, and soil humidity information can be obtained according to the reflection energy information. The problems that when the soil humidity is detected by adopting a frequency domain reflection method, the frequency information of the sweep frequency signal is fixed, the obtained reflection information is not comprehensive and diverse, the continuous measurement effect cannot be achieved, the soil humidity detection speed is low, and the detection efficiency is not high are solved.
Description
technical field [0001] The present application relates to the technical field of soil detection, in particular to a soil moisture detection method and device. Background technique [0002] Soil moisture refers to soil water content, which is an important physical parameter of soil. At the same time, soil moisture content is also a key indicator in agricultural production conditions, and the size of soil moisture content plays a vital role in the growth of crops. Therefore, it is of great significance to detect soil moisture. [0003] At present, in the prior art, the frequency domain reflectometry (FDR) is often used to detect soil moisture. First, a frequency sweep signal of a specific frequency band is sent to the soil surface, and then the reflection signal reflected from the soil surface is obtained, and the reflection signal is analyzed. The frequency domain information is analyzed, and finally the soil moisture information is obtained. The frequency domain reflectio...
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Login to View More IPC IPC(8): G01N22/04G01S7/41
CPCG01N22/04G01S7/411
Inventor 杜源杨思千税涵月刘乘杰李琼杜力
Owner NANJING UNIV