Performance evaluation of power transmission coils for powering endoscopic wireless capsules

This paper presents an analysis of H-field generated by a simple solenoid, pair of solenoids, pair of double-layer solenoids, segmented-solenoid, and Helmholtz power transmission coils (PTCs) to power an endoscopic wireless capsule (WC). The H-fields were computed using finite element analysis based...

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Bibliographic Details
Published in2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) Vol. 2015; pp. 2263 - 2266
Main Authors Rubel Basar, Md, Ahmad, Mohd Yazed, Jongman Cho, Ibrahim, Fatimah
Format Conference Proceeding Journal Article
LanguageEnglish
Published United States IEEE 01.01.2015
Subjects
Capsule Endoscopy - instrumentation
Capsule Endoscopy - methods
Coils
Electric Power Supplies
Electromagnetic Fields
Endoscopes
Miniaturization
Optical wavelength conversion
Power transmission
Solenoids
Wireless communication
Wireless sensor networks
Wireless Technology
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Summary:This paper presents an analysis of H-field generated by a simple solenoid, pair of solenoids, pair of double-layer solenoids, segmented-solenoid, and Helmholtz power transmission coils (PTCs) to power an endoscopic wireless capsule (WC). The H-fields were computed using finite element analysis based on partial differential equations. Three parameters were considered in the analysis: i) the maximum level of H-field (H max ) to which the patient's body would be exposed, ii) the minimum level of H-field (H min ) effective for power transmission, and iii) uniformity of H-field. We validated our analysis by comparing the computed data with data measured from a fabricated Helmholtz PTC. This analysis disclosed that at the same excitation power, all the PTCs are able to transfer same amount of minimum usable power since they generated almost equal value of H min . The level of electromagnetic exposure and power transfer stability across all the PTCs would vary significantly which is mainly due to the different level of H max and H-field uniformity. The segmented solenoid PTC would cause the lowest exposure and this PTC can transfer the maximum amount of power. The Helmholtz PTC would be able to transfer the most stable power with a moderate level of exposure.
ISSN:1094-687X
1557-170X
1558-4615
DOI:10.1109/EMBC.2015.7318843