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碩士 === 國立中央大學 === 光機電工程研究所 === 107 === This study is based on the anisotropic magnetic resistance sensors. We have designed a sensor platform, which can measure DC magnetic and 60Hz AC magnetic. This platform has 16bit ADC with redefine resolution down to 2 nTesla and sampling rate up to 5kHz, which...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2019
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| Online Access: | http://ndltd.ncl.edu.tw/handle/xr9etz |
| Summary: | 碩士 === 國立中央大學 === 光機電工程研究所 === 107 === This study is based on the anisotropic magnetic resistance sensors. We have designed a sensor platform, which can measure DC magnetic and 60Hz AC magnetic. This platform has 16bit ADC with redefine resolution down to 2 nTesla and sampling rate up to 5kHz, which is enough to measure the DC magnetic effect by Residual magnetism and AC magnetic effect by electricity for life.
By experiment of measure background noise, we designed FIR filter to measure DC magnetic and using convolution to measure AC magnetic. Using Helmholtz Coil and recursive least square to correction gain and offset. Prove that the standard deviation from real magnetic is under 40 nTesla
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