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Soil moisture sensor calibration device and method based on time domain transmission technology

A soil moisture and time domain transmission technology, applied in the field of measurement, can solve the problems of incomplete calibration instruments and achieve the effect of temperature compensation

Inactive Publication Date: 2013-02-27
SUZHOU NANZEE SENSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing calibration methods and calibration instruments are incomplete, especially the soil moisture sensor based on time domain transmission technology (TDT), and there are no related products and calibration methods in China

Method used

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  • Soil moisture sensor calibration device and method based on time domain transmission technology
  • Soil moisture sensor calibration device and method based on time domain transmission technology
  • Soil moisture sensor calibration device and method based on time domain transmission technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0032] Embodiment: The following uses a TDT soil moisture sensor to calibrate sandy soil as an example to illustrate the specific use scheme of this calibration method, but the use of the device of the present invention is not limited thereto.

[0033] (1) Installation of the calibration device

[0034] The calibration device is installed as figure 2 shown. For the convenience of adding water, the Martens bottle should be placed 1m higher than the plexiglass column. The plexiglass column containing the soil column and the TDT sensor probe is placed on the electronic balance, and the multimeter and batteries cannot be placed on the electronic balance. Among them, the multimeter, battery, and electronic balance are only kept on when reading, and kept off for the rest of the time.

[0035] (2), reading

[0036] When calibrating sandy soil, the volume water content of the initial design soil column is 5%, and the amount of water added each time is equivalent to 5% v...

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Abstract

The invention discloses a soil moisture sensor calibration device and method based on a time domain transmission technology(TDT). A sensor probe mainly consists of a built-in circuit board, a coaxial cable, a copper line and epoxy resin. The calibration device mainly consists of a multimeter, a battery, an organic glass column, an earth pillar, a TDT sensor, an electronic balance, a Marriott bottle (Markov bottle) and an artificial climatic box. According to the calibration method disclosed by the invention, different soil textures can be calibrated to obtain a calibration curve and a relevant parameter as well as obtain a temperature calibration curve so as to better realize temperature compensation. The parameter obtained with the calibration method disclosed by the invention has an important meaning on TDT soil moisture sensor performance evaluation, subsequent perfection and development and practical application.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a calibration method of a soil moisture sensor based on time domain transmission technology (TDT). Background technique [0002] At present, there are many soil moisture measurement technologies in the world, among which the weighing method is the standard method, the neutron meter method is the second standard method, the time domain reflectometry (TDR) is the mainstream method, and there are also γ-ray (transmission) method, Resistance method and frequency domain reflectometry (FDR), etc. Different assay techniques have their own different application conditions and advantages and disadvantages. Taking the TDR method as an example, this technology has the characteristics of convenience, speed, accuracy, and automatic monitoring of soil moisture dynamic changes at fixed points. However, the price of TDR instrument is relatively expensive, and it requires high knowledge an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00
Inventor 沈征涛周春慧施斌
Owner SUZHOU NANZEE SENSING TECH
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