Document Type

Conference Proceeding

Publication Date



Bioengineering ; Components, Circuits, Devices and Systems


Capsule endoscopy is a new technology that has the potential to replace conventional endoscopy in the near future due to its non-invasive nature. A major limitation for their functionality is the limited battery life. We have investigated a triboelectric energyharvester inside a capsule endoscope that can generate power from natural contractions of gastrointestinal (GI) tract. The periodic contacts and separations of two triboelectric materials inside the capsule endoscope create an alternating current that can be used to charge the capsule endoscope battery, which is used for imaging the GI tract. This study presents an analytical closed form solution for the output power of a cylindrical triboelectric energy harvester. Energy harvester sizes have been optimized to maximize the output power.


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Publisher Attribution

Liu, L., Towfighian, S., & Jin, Z. (2015). A cylindrical triboelectric energy harvester for capsule endoscopes. Biomedical Circuits and Systems Conference (BioCAS), 2015 IEEE, 1-4. doi: 10.1109/BioCAS.2015.7348290



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