| FHD 磁力仪分量线圈装置误差对磁偏角观测的影响分析 |
| |
| 引用本文： | 冯志生,夏忠,梅卫萍,张秀霞,庄明龙,沈红会,张晓勇.FHD 磁力仪分量线圈装置误差对磁偏角观测的影响分析[J].地震,2003,23(4):97-103. |
| |
| 作者姓名： | 冯志生 夏忠 梅卫萍 张秀霞 庄明龙 沈红会 张晓勇 |
| |
| 作者单位： | 江苏省地震局, 江苏南京 210014 |
| |
| 基金项目： | 十五"国家科技攻关项目(200104BA601B01 04 02) |
| |
| 摘 要： | 根据FHD 磁力仪观测磁偏角的原理, 计算了分量线圈不水平导致的磁偏角观测值误差,发现分量线圈仅在EW 方向的倾斜对磁偏角观测产生误差。文中将理论分析结果与实际观测结果进行了对比分析, 发现由于分量线圈底座水平的长期漂移, 仪器的垂直分量及磁偏角观测误差也会发生长期漂移, 长期漂移变化的周期约2 ~ 4 个月, 对垂直分量其幅度约3.5~ 11.0nT, 而磁偏角的幅度约0.1′~ 1.0′, 因此认为在将该仪器观测值用作绝对观测值进行地震异常分析时, 应注意回避这种长期漂移变化。
|
| 关 键 词： | 分量核旋仪 自动化 磁偏角 装置误差 漂移 |
| 文章编号： | 1000-3274(2003)04-0097-07 |
| 收稿时间： | 2003-01-07 |
| 修稿时间： | 2003-03-13 |
Study on the influence of the directional error of the vector coil on the declination of FHD vector proton precession magnetometer |
| |
| FENG Zhi-sheng,XIA Chong,MEI Wei-ping,ZHANG Xiu-xia,ZHUANG Ming-long,SHEN Hong-hui,ZHANG Xiao-yong.Study on the influence of the directional error of the vector coil on the declination of FHD vector proton precession magnetometer[J].Earthquake,2003,23(4):97-103. |
| |
| Authors: | FENG Zhi-sheng XIA Chong MEI Wei-ping ZHANG Xiu-xia ZHUANG Ming-long SHEN Hong-hui ZHANG Xiao-yong |
| |
| Institution: | Seismological Bureau of Jiangsu Province, Nanjing 210014, China |
| |
| Abstract: | This paper studied the inf luence of the direct ional error of vecto r coil on the declination of FHG vector proton precession magnetometer in theory.The result indicates that only the di rectional erro r of the vector coil in east-w est direction has the inf luence on the declination. This paper also analyzed the erro r of observation data w ith the theoretical result, and f inds that there is long-period drif t about the erro r of observation data of declination and horizontal intensity of this magnetometers with the drift of directional error of the vector coil.The est imated drif t cycle ranges 2 ~ 4 months, the drift quanti ty of vertical intensity is about 3.5 ~ 11.0 nT, the declination is 0.1′~ 1.0′.The sug gestion is also proposed that the drif t must be avoided in analy sis of seismomagnetic precursor. |
| |
| Keywords: | Vector proton precession magnetometer Automatic Declination Directional error Drift |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地震》浏览原始摘要信息 |
| 点击此处可从《地震》下载免费的PDF全文 |
|
