Thru-the-Soil Long Range Wireless Power Transfer

Nieman, Brandon T.; Pearce, Matthew G. S.; Johnson, Christopher S.; Tidwell, M.; Whitehead, J.; Neste, C. W. Van

doi:10.1109/wpw54272.2022.9853958

Cited by 4 publications

(2 citation statements)

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“…Some literature has shown that currents through soil can be beneficial to the growth of plants [31]. It was also discovered that telluric currents generated from a substation 0.8km away can be observed at the Tx [24]. Measured data shows the Tx receives approximately 5.6V P eak from the substation.…”

Section: Discussion On Improvements In Range and Transfer Efficiencymentioning

confidence: 99%

“…2(b)). This model is only slightly different from the current controlled voltage source model presented in [24]. The difference between the two models is that the coupled circuit allows impedance variations at the Rx to be seen by the Tx, which is expected to occur once the resistive components of Z T X and Z RX are made small.…”

Section: A Geometry and Circuit Modelmentioning

confidence: 98%

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Through the Soil Long Range Wireless Power Transfer for Agricultural IoT Networks

Nieman

Johnson

Pearce

et al. 2024

IEEE Trans. Ind. Electron.

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Increasing the spatial and temporal density of data using networked sensors, known as the Internet of Things (IoT), can lead to enhanced productivity and cost savings in a host of industries. Where applications involve large outdoor expanses, such as farming, oil and gas, or defense, large regions of unelectrified land could yield significant benefits if instrumented with a high density of IoT systems. The major limitation of expanding IoT networks in such applications stems from the challenge of delivering power to each sensing device. Batteries, generators, and renewable sources have predominately been used to address the challenge, but these solutions require constant maintenance or are sensitive to environmental factors. This work presents a novel approach where conduction currents through soil are utilized for the wireless powering of sensor networks, initial investigation is within an 0.8-ha (2-acre) area. The technique is not line-of-sight, powers all devices simultaneously through near-field mechanics, and has the ability to be minimally invasive to the working environment. A theory of operation is presented and the technique is experimentally demonstrated in an agricultural setting. Scaling and transfer parameters are discussed. Keywords-Wireless power transfer, Through the Soil, Long Range, conduction I. INTRODUCTIONDecision making based on real-time/measured data is critically important to boosting revenue/productivity in many industries. Sensor installation throughout the industrial process plays a fundamental role in these tools. The number of sensors that can be installed is limited by two primary factors: (1) the cost (including installation/maintenance) of the sensor and Manuscript received Month xx, 2xxx; revised Month xx, xxxx; accepted Month x, xxxx.

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Section: Discussion On Improvements In Range and Transfer Efficiencymentioning

confidence: 99%

Section: A Geometry and Circuit Modelmentioning

confidence: 98%