| 地磁FHD型质子矢量磁力仪噪声性能故障分析 |
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| 作者姓名： | 彭澎 孙煜杰 张荣杉 张朋 夏忠 |
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| 作者单位： | 宿迁地震监测中心站，江苏宿迁223800 |
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| 基金项目： | 江苏省地震局地震电磁观测技术与仪器研发创新团队项目资助。 |
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| 摘 要： | 针对宿迁台FHD型质子矢量磁力仪观测数据从2020年4月28日出现噪声增大问题，我们通过对仪器参数设置、观测环境、观测仪器、运行状况分类逐一进行检查、排查与分析，确认FHD仪器主机发生故障。故障原因为仪器补偿电流电路中的电容器件老化被击穿，检修更换器件得以解决。经检修后，该仪器观测数据磁偏角D、水平分量H和垂直分量Z的计算平均噪声由故障时的1.19′、1.45 nT、1.58 nT降低为0.82′、0.32 nT、0.50 nT，各分量噪声水平获得了明显的改善。通过对地磁仪器和外部观测环境问题的分类检查、检测与判断，并对查明引起数据噪声增大原因归类总结，为地磁台站查找分析数据噪声变大主要原因提供一种科学有效的检测方法。
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| 关 键 词： | 地磁观测 FHD仪器 数据噪声 故障分析 |
| 收稿时间： | 2022-04-04 |
Noise fault analysis of FHD proton vector magnetometer:Taking Suqian geomagnetic station as an example |
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| Affiliation: | Suqian Seismic Monitoring Center Station, Jiangsu Suqian 223800, China |
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| Abstract: | In this paper we analyzed the increased noise in the observation data of FHD proton vector magnetometer at Suqian station from April 28, 2020. After we checked and analyzed the instrument parameter settings, observation environment, instrument and operation conditions, the failure of FHD instrument is confirmed. The capacitor in the instrument compensation current circuit was broken down due to aging, and we solved the problem by replacing the faulty capacitor. After the repairmen, the calculated background noise of magnetic declination D, horizontal component H and vertical component Z decreased from 1.19′, 1.45 nT, 1.58 nT to 0.82′, 0.32 nT, 0.50 nT, and the noise quality of each component had been significantly improved. Through the inspection, detection and judgment of geomagnetic instruments and external observation environmental problems, we summarize the reasons for the noise fault. This paper provides a scientific and effective detection method for geomagnetic stations to find and analyze the main reason for the data noise problems. |
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