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Sensors 2015, 15(12), 31581-31605; doi:10.3390/s151229870

Through-Metal-Wall Power Delivery and Data Transmission for Enclosed Sensors: A Review

Science and Technology on Integrated Logistics Support Laboratory, National University of Defense Technology, Changsha 410073, China
These authors contributed equally to this work.
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Author to whom correspondence should be addressed.
Academic Editor: Davide Brunelli
Received: 3 September 2015 / Revised: 25 November 2015 / Accepted: 8 December 2015 / Published: 15 December 2015
(This article belongs to the Section State-of-the-Art Sensors Technologies)
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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. View Full-Text
Keywords: through metal wall; power delivery; data transmission; metallic enclosed sensors through metal wall; power delivery; data transmission; metallic enclosed sensors
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Yang, D.-X.; Hu, Z.; Zhao, H.; Hu, H.-F.; Sun, Y.-Z.; Hou, B.-J. Through-Metal-Wall Power Delivery and Data Transmission for Enclosed Sensors: A Review. Sensors 2015, 15, 31581-31605.

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