Flexible PCB Failures From Dynamic Activity and Their Impacts on Bioimpedance Measurements: A Wearable Case Study
Wearable health monitoring systems that collect data in free-living environments are becoming increasingly popular. Flexible printed circuits provide a commercially available option that can conform to the shape of a wearable system and support electronic sensing and flexible interconnect. However,...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IEEE
2021-01-01
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| Series: | IEEE Open Journal of Circuits and Systems |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9626077/ |
| _version_ | 1798022390760865792 |
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| author | Shelby Critcher Todd J. Freeborn |
| author_facet | Shelby Critcher Todd J. Freeborn |
| author_sort | Shelby Critcher |
| collection | DOAJ |
| description | Wearable health monitoring systems that collect data in free-living environments are becoming increasingly popular. Flexible printed circuits provide a commercially available option that can conform to the shape of a wearable system and support electronic sensing and flexible interconnect. However, repetitive dynamic activity can stress and damage the interconnect of flexible PCBs which degrades data quality. This case study evaluated the performance of flexible PCBs providing interconnect between electrodes and sensing electronics for tissue bioimpedance measurements in a wearable system. Resistance data (1 kHz to 128 kHz) was collected from localized knee tissues of 3 participants using the wearable design with flexible PCBs over 7 days of free-living. From electrical and optical inspection after use trace cracking of the flexible PCBs occurred, degrading tissue resistances reported by the wearable system. Exploration of these results advances understanding of how flexible PCBs perform in free-living conditions for wearable bioimpedance applications. |
| first_indexed | 2024-04-11T17:29:02Z |
| format | Article |
| id | doaj.art-884a820f1f8f43b7a685336d6d3e6c22 |
| institution | Directory Open Access Journal |
| issn | 2644-1225 |
| language | English |
| last_indexed | 2024-04-11T17:29:02Z |
| publishDate | 2021-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of Circuits and Systems |
| spelling | doaj.art-884a820f1f8f43b7a685336d6d3e6c222022-12-22T04:12:11ZengIEEEIEEE Open Journal of Circuits and Systems2644-12252021-01-01273274210.1109/OJCAS.2021.31223699626077Flexible PCB Failures From Dynamic Activity and Their Impacts on Bioimpedance Measurements: A Wearable Case StudyShelby Critcher0https://orcid.org/0000-0002-8888-2452Todd J. Freeborn1https://orcid.org/0000-0001-9979-7301Department of Electrical and Computer Engineering, University of Alabama, Tuscaloosa, AL, USADepartment of Electrical and Computer Engineering, University of Alabama, Tuscaloosa, AL, USAWearable health monitoring systems that collect data in free-living environments are becoming increasingly popular. Flexible printed circuits provide a commercially available option that can conform to the shape of a wearable system and support electronic sensing and flexible interconnect. However, repetitive dynamic activity can stress and damage the interconnect of flexible PCBs which degrades data quality. This case study evaluated the performance of flexible PCBs providing interconnect between electrodes and sensing electronics for tissue bioimpedance measurements in a wearable system. Resistance data (1 kHz to 128 kHz) was collected from localized knee tissues of 3 participants using the wearable design with flexible PCBs over 7 days of free-living. From electrical and optical inspection after use trace cracking of the flexible PCBs occurred, degrading tissue resistances reported by the wearable system. Exploration of these results advances understanding of how flexible PCBs perform in free-living conditions for wearable bioimpedance applications.https://ieeexplore.ieee.org/document/9626077/Flexible printed circuitswearable sensorsfailure analysistrace crackingbioimpedance |
| spellingShingle | Shelby Critcher Todd J. Freeborn Flexible PCB Failures From Dynamic Activity and Their Impacts on Bioimpedance Measurements: A Wearable Case Study IEEE Open Journal of Circuits and Systems Flexible printed circuits wearable sensors failure analysis trace cracking bioimpedance |
| title | Flexible PCB Failures From Dynamic Activity and Their Impacts on Bioimpedance Measurements: A Wearable Case Study |
| title_full | Flexible PCB Failures From Dynamic Activity and Their Impacts on Bioimpedance Measurements: A Wearable Case Study |
| title_fullStr | Flexible PCB Failures From Dynamic Activity and Their Impacts on Bioimpedance Measurements: A Wearable Case Study |
| title_full_unstemmed | Flexible PCB Failures From Dynamic Activity and Their Impacts on Bioimpedance Measurements: A Wearable Case Study |
| title_short | Flexible PCB Failures From Dynamic Activity and Their Impacts on Bioimpedance Measurements: A Wearable Case Study |
| title_sort | flexible pcb failures from dynamic activity and their impacts on bioimpedance measurements a wearable case study |
| topic | Flexible printed circuits wearable sensors failure analysis trace cracking bioimpedance |
| url | https://ieeexplore.ieee.org/document/9626077/ |
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