A method of electrical conductivity compensation in a low-cost soil moisture sensing measurement based on capacitance

Deng, Xiao; Gu, Huinan; Yang, Lei; Lyu, Huafang; Cheng, Yuanguo; Pan, Lipeng; Fu, Zijian; Cui, Liqin; Zhang, Li

doi:10.1016/j.measurement.2019.107052

Cited by 41 publications

(16 citation statements)

References 24 publications

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“…In recent years a number of low cost ($5-$50 USD) FDR soil moisture sensors have been developed and commercialized including the DFROBOT SEN0193, Adafruit STEMMA Soil Sensor, Tindie SoilWatch 10, and Vegetronix VH400. For more approaches see [14,[40][41][42][43][44][45][46][47][48][49] and others.…”

Section: Frequency Domain Reflectometry (Fdr) and Capacitancementioning

confidence: 99%

Review of Novel and Emerging Proximal Soil Moisture Sensors for Use in Agriculture

Hardie

2020

Sensors

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The measurement of soil moisture in agriculture is currently dominated by a small number of sensors, the use of which is greatly limited by their small sampling volume, high cost, need for close soil–sensor contact, and poor performance in saline, vertic and stony soils. This review was undertaken to explore the plethora of novel and emerging soil moisture sensors, and evaluate their potential use in agriculture. The review found that improvements to existing techniques over the last two decades are limited, and largely restricted to frequency domain reflectometry approaches. However, a broad range of new, novel and emerging means of measuring soil moisture were identified including, actively heated fiber optics (AHFO), high capacity tensiometers, paired acoustic / radio / seismic transceiver approaches, microwave-based approaches, radio frequency identification (RFID), hydrogels and seismoelectric approaches. Excitement over this range of potential new technologies is however tempered by the observation that most of these technologies are at early stages of development, and that few of these techniques have been adequately evaluated in situ agricultural soils.

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Section: Frequency Domain Reflectometry (Fdr) and Capacitancementioning

confidence: 99%

Review of Novel and Emerging Proximal Soil Moisture Sensors for Use in Agriculture

Hardie

2020

Sensors

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“…The main factors affecting soil electrical conductivity are the soluble salt, clay content and water content, and the effect of water content is the most significant [17,18]. Under normal circumstances, the effect of the soluble salt and clay content is negligible, so the soil conductivity can be approximated by the following formula [19,20]:…”

Section: Electrical Conductivity Of Soilmentioning

confidence: 99%

Application and Algorithm of Ground-Penetrating Radar for Plant Root Detection: A Review

Liang

Xing

Lin

2020

Sensors

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Attention to the natural environment is equivalent to observing the space in which we live. Plant roots, which are important organs of plants, require our close attention. The method of detecting root system without damaging plants has gradually become mainstream. At the same time, machine learning has been achieving good results in recent years; it has helped develop many tools to help us detect the underground environment of plants. Therefore, this article will introduce some existing content related to root detection technology and machine detection algorithms for root detection, proving that machine learning root detection technology has good recognition capabilities.

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“…The single-electrode method can reflect the overall quality of the casing inner coating, but it can not detect local damages [11]. Most of the multi-electrode methods use the DC current detection method, which can not solve the polarization effects caused by electrolyte [12], [13]; The microelectrode method requires the instrument to be close to the inner wall of the casing, which can effectively detect the local coating quality, but it is easy to miss the area where the casing does not contact with the coating [14]. In 2011, Wan et al proposed the Field Signature Method [15].…”

Section: Introductionmentioning

confidence: 99%

Instrument Design for Detecting the Inner Damage of Casing

Guo

Yong

Li³

et al. 2021

IEEE Access

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Detecting and localizing the inner damage of the downhole casing is crucial for oil and gas production. The current methods for damage detection suffer from polarization effect, capacitance effect, and difficulty in measuring weak direct current signals. As an alternative, we propose a new instrument design based on a six-electrode array in this study. The basic detection principle is introduced, and the key factors that affect the detection performance are studied through modeling and simulation. Besides, the entire system of the instrument design consisting of several modules is presented. In addition, an experiment is conducted to demonstrate the detection capability of the proposed design. It is found that the detection dynamic of the instrument is 93 dB and a signal-to-noise ratio is 73 dB. It can detect damage when salinity is lower than 120 g/l and can identify the location of damage with high resolution in the longitudinal and radial directions.

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A method of electrical conductivity compensation in a low-cost soil moisture sensing measurement based on capacitance

Cited by 41 publications

References 24 publications

Review of Novel and Emerging Proximal Soil Moisture Sensors for Use in Agriculture

Review of Novel and Emerging Proximal Soil Moisture Sensors for Use in Agriculture

Application and Algorithm of Ground-Penetrating Radar for Plant Root Detection: A Review

Instrument Design for Detecting the Inner Damage of Casing

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