Short-Time and High-Precision Measurement Method for Larmor Frequency of Marine Overhauser Sensor
| Autor: | Huan Liu, Wang Luo, Jian Ge, Haiyang Zhang, Zhiwen Yuan, Jun Zhu, Qiu Xiangyu, Haobin Dong |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Physics Larmor precession Accuracy and precision Field (physics) Magnetometer 010401 analytical chemistry Resolution (electron density) 01 natural sciences Signal 0104 chemical sciences law.invention law 0103 physical sciences Electrical and Electronic Engineering Instrumentation Algorithm Interpolation Communication channel |
| Zdroj: | IEEE Sensors Journal. 18:1442-1448 |
| ISSN: | 2379-9153 1530-437X |
| DOI: | 10.1109/jsen.2017.2785381 |
| Popis: | The measurement accuracy of the Larmor frequency of the Overhauser magnetic sensor directly determines the magnetic accuracy of the Overhauser magnetometer. We propose a multichannel interpolation method for marine magnetic measurements, addressing specifically the deficiencies in traditional measurement methods. The quantization error of the count value of the standard signal is greatly reduced using the delay chain interpolation technique. Also the influence arising from the phase error is weakened through channel expansion. In addition, we also design a test platform and conduct two sets of field contrast tests, the test results showing that the proposed method not only improves the precision of the frequency measurement by about three times but also improves the resolution and lowers the noise level of the system. |
| Databáze: | OpenAIRE |
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