Soil humidity inversion method aiming for ultra wide band radar echo

An ultra-wideband radar and soil moisture technology, applied in radio wave measurement systems, instruments, etc.

Inactive Publication Date: 2015-12-02
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

There is no report on channel modeling and parameter inversion of soil based on UWB signals

Method used

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  • Soil humidity inversion method aiming for ultra wide band radar echo
  • Soil humidity inversion method aiming for ultra wide band radar echo
  • Soil humidity inversion method aiming for ultra wide band radar echo

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Experimental program
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Embodiment Construction

[0047] The soil moisture inversion method based on fuzzy logic for UWB radar echo mainly includes the following contents:

[0048] 1. Test equipment

[0049] This method uses the PulsONP410-MRM monostatic radar module of TimeDomainCorp. and the FieldScoutTDR300 time domain reflectometer, and the later data processing software is MATLABR2015a and WindowsExcel2013 of Mathworks Company.

[0050] 2. Test steps

[0051] 2.1. Template generation:

[0052](a) For the delineated area, select a reference point, and use the TDR300 time domain reflectometer to perform nine-point measurement method in the 30 cm square area near the reference point to perform volumetric water content benchmark calibration. Among them, according to the hardness of the soil, the appropriate probe length should be selected for TDR300, and it should be calibrated with clean water before measurement.

[0053] (b) Use the P410-MRM module to suspend it on the support at a height of 80cm from the ground, and ca...

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Abstract

The invention belongs to the soil humidity inversion method and particularly relates to the soil humidity inversion method aiming for the ultra wide band radar echo. The soil humidity inversion method aiming for ultra wide band radar echo comprises steps of obtaining near-real-time echo data by using the characteristics of short pulse, strong penetrability, and anti-interference of the ultra wide band radar, utilizing a fuzzy logic system to study and extract characteristic parameters of a membership function from the echo data, and inverting soil volume water content through performing template matching on the membership function. The method provided by the invention is accurate and fast and low in cost, and can monitor the changing of the soil humidity in unattended operation for long time. The low cost of the invention is applicable to generalization and applicable to the assembled radar sensing network performing real time monitoring on the big area soil humidity, and, as a result, the invention provides a reliable mean to realize the accuracy agriculture.

Description

technical field [0001] The invention relates to a soil moisture inversion method based on fuzzy logic, which acts on echo signals obtained by ultra-wideband radars and belongs to the field of ultra-wideband radar signal inversions. Background technique [0002] Soil moisture is a critical and highly variable parameter of the soil environment, widely studied in related fields such as precision agriculture, hydrology, geogeology, etc. It is of great significance to accurately describe soil moisture characteristics on different space-time scales. The current soil moisture inversion based on the microwave frequency band and large-scale ground-penetrating radar is mainly aimed at large-scale moisture monitoring, and its resolution is low. For ordinary farmers, the cost of obtaining such data is too high, which is not conducive to precision agriculture. large-scale promotion. Therefore, a low-cost monitoring of soil moisture changes in a small-scale range that is suitable for hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 梁菁朱方启刘怀远毛诚晨胡耀月霍扬扬
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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