| Presentation | 2014-12-19 Electromagnetic Interference Evaluation for a Wearable ECG at Frequencies below 1 MHz Wei LIAO, Jingjing SHI, Jianqing WANG, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this study, we propose a two-step approach to evaluate electromagnetic interference (EMI) with a wearable vital signal sensor. The two-step approach combines a quasi-static electromagnetic (EM) field analysis and an electric circuit analysis, and is applied to the EMI analysis at frequencies below 1 MHz for our developed wearable electrocardiogram (ECG) to demonstrate its usefulness. The quasi-static EM field analysis gives the common mode voltage coupled from the incident EM field at the ECG sensing electrodes, and the electric circuit analysis quantifies a differential mode voltage at the differential amplifier output of the ECG detection circuit. The differential mode voltage has been shown to come from a conversion from the common mode voltage due to an unbalance between the contact impedances of the two sensing electrodes. It may achieve nearly 1 V at the differential amplifier output under 10-V/m plane-wave incident electric field, and completely mask the ECG signal. It is essential to reduce the unbalance as much as possible to not cause a significant interference voltage in the amplified ECG signal. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Electromagnetic interference (EMI) / wearable electrocardiogram (ECG) / sensing electrode / common mode voltage / differential mode voltage / quasi-static approximation |
| Paper # | EMCJ2014-76 |
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| Conference Information | |
| Committee | EMCJ |
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| Conference Date | 2014/12/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Electromagnetic Compatibility (EMCJ) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Electromagnetic Interference Evaluation for a Wearable ECG at Frequencies below 1 MHz |
| Sub Title (in English) | |
| Keyword(1) | Electromagnetic interference (EMI) |
| Keyword(2) | wearable electrocardiogram (ECG) |
| Keyword(3) | sensing electrode |
| Keyword(4) | common mode voltage |
| Keyword(5) | differential mode voltage |
| Keyword(6) | quasi-static approximation |
| 1st Author's Name | Wei LIAO |
| 1st Author's Affiliation | Graduate School of Engineering, Nagoya Institute of Technology() |
| 2nd Author's Name | Jingjing SHI |
| 2nd Author's Affiliation | Graduate School of Engineering, Nagoya Institute of Technology |
| 3rd Author's Name | Jianqing WANG |
| 3rd Author's Affiliation | Graduate School of Engineering, Nagoya Institute of Technology |
| Date | 2014-12-19 |
| Paper # | EMCJ2014-76 |
| Volume (vol) | vol.114 |
| Number (no) | 381 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |