Related Experiment Video
Updated: Mar 28, 2026

In Situ Soil Moisture Sensors in Undisturbed Soils
Published on: November 18, 2022
Through-Metal-Wall Power Delivery and Data Transmission for Enclosed Sensors: A Review
Ding-Xin Yang1, Zheng Hu2, Hong Zhao3
1Science and Technology on Integrated Logistics Support Laboratory, National University of Defense Technology, Changsha 410073, China. yangdingxincn@163.com.
Abstract:
The aim of this review was to assess the current viable technologies for wireless power delivery and data transmission through metal barriers. Using such technologies sensors enclosed in hermetical metal containers can be powered and communicate through exterior power sources without penetration of the metal wall for wire feed-throughs. In this review, we first discuss the significant and essential requirements for through-metal-wall power delivery and data transmission and then we: (1) describe three electromagnetic coupling based techniques reported in the literature, which include inductive coupling, capacitive coupling, and magnetic resonance coupling; (2) present a detailed review of wireless ultrasonic through-metal-wall power delivery and/or data transmission methods; (3) compare various ultrasonic through-metal-wall systems in modeling, transducer configuration and communication mode with sensors; (4) summarize the characteristics of electromagnetic-based and ultrasound-based systems, evaluate the challenges and development trends. We conclude that electromagnetic coupling methods are suitable for through thin non-ferromagnetic metal wall power delivery and data transmission at a relatively low data rate; piezoelectric transducer-based ultrasonic systems are particularly advantageous in achieving high power transfer efficiency and high data rates; the combination of more than one single technique may provide a more practical and reliable solution for long term operation.
More Related Videos
08:49Manufacturing Simple and Inexpensive Soil Surface Temperature and Gravimetric Water Content Sensors
Published on: December 21, 2019
11:21Methodology for Establishing a Community-Wide Life Laboratory for Capturing Unobtrusive and Continuous Remote Activity and Health Data
Published on: July 27, 2018
Related Concept Videos
Line Protection with Impedance Relays
Under normal conditions, low load currents keep the measured...
Electrical Systems
To derive the transfer function, consider an RLC...
Energy Stored In A Coaxial Cable
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic field inside...
Power System Distribution
The transmission system is designed...
Electrical Power
Insulation Coordination