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A temperature sensor-assisted gnss‑r soil moisture detection device

A temperature sensor and soil moisture technology, applied in the field of soil moisture measurement, can solve the problems of inability to obtain soil moisture data and inaccurate humidity retrieval values, etc.

Active Publication Date: 2017-06-06
山东航向电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of soil moisture measurement technology based on GNSS-R, at present, the relative power peak value of the soil reflection signal and the direct signal is generally obtained through the reflection signal receiver, and then the soil surface reflectance is estimated by using the peak ratio, and then the soil dielectric is calculated. constant, so as to obtain the soil moisture. In actual calculation, the influence of temperature on the inversion of soil moisture is often ignored, resulting in inaccurate humidity inversion values. In addition, the inversion process needs to obtain the relevant power peak value firstly by the receiver, and then perform subsequent processing , can not get real-time soil moisture data

Method used

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  • A temperature sensor-assisted gnss‑r soil moisture detection device
  • A temperature sensor-assisted gnss‑r soil moisture detection device
  • A temperature sensor-assisted gnss‑r soil moisture detection device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Embodiment 1 is the structural diagram of the GNSS-R soil moisture detection device assisted by the temperature sensor, as figure 1 As shown, the device is mainly composed of five parts: antenna, GNSS reflection signal receiver module, soil composition setting module, soil temperature detection and judgment module, and soil moisture inversion module. The antenna consists of figure 1 The number 12 and 13 shown are composed of parts; the GNSS reflected signal receiver module consists of figure 1 The shown radio frequency front-end 1, A / D converter 2, FPGA multi-channel correlator 3, direct signal correlation processing in the DSP signal processor and reflection channel mode configuration are composed of 4 parts; the soil composition setting module consists of figure 1 The shown soil composition input 5, set the soil composition S, C value 6 parts; the soil temperature detection and judgment module consists of figure 1 The shown temperature sensor 7, temperature reading 8...

Embodiment 2

[0059] Embodiment 2 is the general flowchart of the work of the GNSS-R soil moisture detection device assisted by the temperature sensor, as figure 2 As shown, the specific working steps are:

[0060] 1. Adjust the antennas 12 and 13 so that the direct antenna is vertically upward, and the reflective antenna is aimed at the detection area. The direct antenna receives the direct signal, and the reflective antenna receives the reflected signal from the reflective area. Start the GNSS reflected signal receiver to receive the direct and reflected signal data in the reflection area, and pass through the RF front-end 1, A / D converter 2, FPGA multi-channel correlator 3 and direct signal correlation processing in the DSP signal processor and the reflection channel mode configuration part After the correlation processing of 4, the correlation power peak value and the satellite elevation angle information of the direct reflection signal are obtained;

[0061] 2. Extract the correlatio...

Embodiment 3

[0092] Embodiment 3 is the method for inverting soil moisture in the soil moisture inversion module, such as Figure 5 As shown, for the specific implementation process, refer to steps 5-8 in Embodiment 2, which will not be repeated here.

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Abstract

The invention discloses a temperature sensor assisted GNSS-R (Global Navigation Satellite System-Reflection) soil moisture detection device. The device is composed of an antenna, a GNSS reflecting signal receiver module, a soil component setting module, a soil temperature detection and judging module and a soil moisture inversion module, wherein the antenna is connected with the GNSS reflecting signal receiver module, and located at the front end of the GNSS reflecting signal receiver module; the GNSS reflecting signal receiver module is connected with the soil moisture inversion module and located at the front end of the soil moisture inversion module; the soil component setting module and the soil temperature detection and judging module are respectively connected with the soil moisture inversion module, the treatment processes are in front of the soil moisture inversion module, and the soil moisture inversion module is sued for receiving output results of the GNSS reflecting signal receiver module, the soil component setting module and the soil temperature detection and judging module as input parameters so as to perform inversion of soil moisture. The device disclosed by the invention has application prospects in the technical field of soil moisture measurement.

Description

technical field [0001] The invention discloses a GNSS-R (Global Navigation Satellite System-Reflections) soil moisture detection device assisted by a temperature sensor. The invention relates to the technical field of soil moisture measurement, and uses GNSS reflection signal technology to measure soil moisture, specifically for receiving reflection signals The GNSS direct and reflected signals received by the machine are correlated with each other, and the soil moisture is retrieved from the processing results and the temperature value assisted by the temperature sensor, so as to obtain the soil moisture value of the detection area. Background technique [0002] GNSS reflection signal soil moisture inversion is a specific application of using satellite signals to carry out remote sensing of vegetation on the earth's surface. It is a passive dual-base or multi-base remote sensing technology. GNSS-R (GNSS-Reflections or GNSS-RemoteSensing) technology is a new branch gradually...

Claims

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Application Information

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IPC IPC(8): G01N22/04G01D21/02
Inventor 张波邹文博杨东凯高超群洪学宝
Owner 山东航向电子科技有限公司
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