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Reliability Analysis of an Epileptic Seizure Detector Powered by an Energy Harvester

Title
Reliability Analysis of an Epileptic Seizure Detector Powered by an Energy Harvester
Authors
Kim, SunheeJu, SunaJi, Chang-Hyeon
Ewha Authors
지창현
SCOPUS Author ID
지창현scopus
Issue Date
2020
Journal Title
MICROMACHINES
ISSN
2072-666XJCR Link
Citation
MICROMACHINES vol. 11, no. 1
Keywords
energy harvestingepilepsymedical signal detectionperformance estimationand power supplies
Publisher
MDPI
Indexed
SCIE; SCOPUS WOS
Document Type
Article
Abstract
Due to a limited lifetime of a battery, energy harvesters have been studied as alternative energy sources for implantable biomedical devices such as an implantable stimulator for epileptic seizure suppression. However, energy harvesters have weakness in providing stable power. We designed a neural recording circuit powered solely by a piezoelectric energy harvester, and applied its output to a seizure detector to analyze the reliability of the recorded signal. Performance of the seizure detector was evaluated. We found that the average time differences between with and without voltage variances were about 0.05 s under regular vibrations and about 0.07 s under irregular vibrations, respectively. The ratio of average true positive alarm period varied within about 0.02% under regular vibrations and 0.029% under irregular vibrations, respectively. The ratio of average false positive alarm period varied within about 0.004% under regular vibrations and 0.014% under irregular vibrations, respectively. This paper presents a reliability analysis of an epileptic seizure detector with a neural signal recording circuit powered by a piezoelectric energy harvester. The results showed that a supply voltage variance within +/- 10% could be acceptable for reliable operation of a seizure detector.
DOI
10.3390/mi11010045
Appears in Collections:
엘텍공과대학 > 전자공학과 > Journal papers
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