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AC/DC Fields Demodulation Methods of Resonant Electric Field Microsensor
Electric field microsensors have the advantages of a small size, a low power consumption, of avoiding wear, and of measuring both direct-current (DC) and alternating-current (AC) fields, which are especially suited to applications in power systems. However, previous reports were chiefly concerned wi...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7281549/ https://www.ncbi.nlm.nih.gov/pubmed/32438559 http://dx.doi.org/10.3390/mi11050511 |
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author | Yang, Pengfei Wen, Xiaolong Chu, Zhaozhi Ni, Xiaoming Peng, Chunrong |
author_facet | Yang, Pengfei Wen, Xiaolong Chu, Zhaozhi Ni, Xiaoming Peng, Chunrong |
author_sort | Yang, Pengfei |
collection | PubMed |
description | Electric field microsensors have the advantages of a small size, a low power consumption, of avoiding wear, and of measuring both direct-current (DC) and alternating-current (AC) fields, which are especially suited to applications in power systems. However, previous reports were chiefly concerned with proposing new structures or improving the resolution, and there are no systematic studies on the signal characteristics of the microsensor output and the demodulation methods under different electric fields. In this paper, the use of an improved resonant microsensor with coplanar electrodes, and the signal characteristics under a DC field, power frequency field, and AC/DC hybrid fields were thoroughly analyzed respectively, and matching demodulation methods derived from synchronous detection were proposed. We theoretically obtained that the frequencies of the detectable electric fields should be less than half of the resonant frequency of the microsensor, and that the sensitivities of the microsensor were identical for AC/DC hybrid fields with different frequencies. Experiments were conducted to verify the proposed demodulation methods. Within electric field ranges of 0–667 kV/m, the uncertainties were 2.4% and 1.5% for the most common DC and 50 Hz power frequency fields, respectively. The frequency characteristic test results of the microsensor were in agreement with those of the theoretical analysis in the range of 0–1 kHz. |
format | Online Article Text |
id | pubmed-7281549 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-72815492020-06-17 AC/DC Fields Demodulation Methods of Resonant Electric Field Microsensor Yang, Pengfei Wen, Xiaolong Chu, Zhaozhi Ni, Xiaoming Peng, Chunrong Micromachines (Basel) Article Electric field microsensors have the advantages of a small size, a low power consumption, of avoiding wear, and of measuring both direct-current (DC) and alternating-current (AC) fields, which are especially suited to applications in power systems. However, previous reports were chiefly concerned with proposing new structures or improving the resolution, and there are no systematic studies on the signal characteristics of the microsensor output and the demodulation methods under different electric fields. In this paper, the use of an improved resonant microsensor with coplanar electrodes, and the signal characteristics under a DC field, power frequency field, and AC/DC hybrid fields were thoroughly analyzed respectively, and matching demodulation methods derived from synchronous detection were proposed. We theoretically obtained that the frequencies of the detectable electric fields should be less than half of the resonant frequency of the microsensor, and that the sensitivities of the microsensor were identical for AC/DC hybrid fields with different frequencies. Experiments were conducted to verify the proposed demodulation methods. Within electric field ranges of 0–667 kV/m, the uncertainties were 2.4% and 1.5% for the most common DC and 50 Hz power frequency fields, respectively. The frequency characteristic test results of the microsensor were in agreement with those of the theoretical analysis in the range of 0–1 kHz. MDPI 2020-05-19 /pmc/articles/PMC7281549/ /pubmed/32438559 http://dx.doi.org/10.3390/mi11050511 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Yang, Pengfei Wen, Xiaolong Chu, Zhaozhi Ni, Xiaoming Peng, Chunrong AC/DC Fields Demodulation Methods of Resonant Electric Field Microsensor |
title | AC/DC Fields Demodulation Methods of Resonant Electric Field Microsensor |
title_full | AC/DC Fields Demodulation Methods of Resonant Electric Field Microsensor |
title_fullStr | AC/DC Fields Demodulation Methods of Resonant Electric Field Microsensor |
title_full_unstemmed | AC/DC Fields Demodulation Methods of Resonant Electric Field Microsensor |
title_short | AC/DC Fields Demodulation Methods of Resonant Electric Field Microsensor |
title_sort | ac/dc fields demodulation methods of resonant electric field microsensor |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7281549/ https://www.ncbi.nlm.nih.gov/pubmed/32438559 http://dx.doi.org/10.3390/mi11050511 |
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