Soil moisture measuring transducer based on time domain transmission and realization method

A technology for measuring sensors and soil moisture, applied in the field of electronics, can solve the problems of high measurement accuracy and low cost, and achieve the effects of high measurement accuracy, low cost, and stable measurement values.

Active Publication Date: 2016-08-10
爱迪斯新技术有限责任公司
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Problems solved by technology

[0007] Since the existing soil moisture measurement methods in China cannot simultaneously satisfy the problems of easy implementation of measurement circuits, low cost, high measurement accuracy, stable measurement values ​​and plug-and-play, the present invention proposes a soil moisture measurement sensor based on time domain transmission and Implementation

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  • Soil moisture measuring transducer based on time domain transmission and realization method
  • Soil moisture measuring transducer based on time domain transmission and realization method
  • Soil moisture measuring transducer based on time domain transmission and realization method

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Embodiment Construction

[0042] The specific embodiments of the invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0043] figure 1 It shows the structure and signal flow diagram of a soil moisture measurement sensor based on time domain transmission provided in this embodiment, and the structure includes: a signal source 41, a moisture sensor 42, a phase shifter 43 and a soil probe 44;

[0044] The signal source 41 is used to generate three high-frequency signals and is respectively connected to the moisture sensor 42, the phase shifter 43 and the soil probe 44, and the first high-frequency signal is used as an in-phase reference signal Send to the moisture sensor 42, send the second high-frequency signal to the phase shifter 43, and send the third high-frequency signal to the soil probe...

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Abstract

The invention discloses a soil moisture measuring transducer based on time domain transmission and realization method. The transducer comprises: a signal source, a moisture perceptron, a phase shifter and a soil probe. The method includes using the signal source for producing three high-frequency sine-wave signals, sending the third high-frequency signal to the soil probe used for perceiving soil moisture information, sending the signal to the moisture perceptron after returning by the probe, performing phase comparison between the signal with the first high-frequency signal to obtain phase difference cosine signal relevant to the soil moisture, the measuring transducer in order to eliminate interference caused by signal amplitude attenuation, using the second high-frequency signal after performing phase shift for 90 degree by the phase shifter as an orthogonal reference signal which is performing phase comparison with soil probe return signal to obtain a phase difference sine signal, and sending the two phase difference signals to a single-chip microcomputer to process and display measured value. The method has high measurement accuracy, stable measured value and low cost, is easy to realize, and has wide application prospect. The performance reaches the international advanced level.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a soil moisture measurement sensor based on time domain transmission and an implementation method. Background technique [0002] At present, the mainstream techniques of soil moisture measurement at home and abroad are: Time Domain Reflectometry (TDR) method, Standing Wave Ratio (SWR) method, Frequency Domain Decomposition (FD) method and time domain transmission (Time Domain Transmissometry, referred to as TDT) method. [0003] The soil moisture sensor based on the TDR principle is currently the most widely accepted and widely used instrument measurement method in the soil moisture measurement method. High measurement accuracy, fast response, wide measurement range, generally does not require calibration, easy to operate, can be used in the field and indoors, TDR measurement results are slightly affected by soil salinity, and are suitable for measuring soils with high organ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/00
CPCG01N23/00
Inventor 石庆兰高万林董乔雪冯磊陈一飞杜尚丰徐云杨卫中孙明杨丽丽
Owner 爱迪斯新技术有限责任公司
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