CAJ | 학술논문

分析国家地磁台网中心2009—2014年FHD磁力仪参考背景噪声数据，发现存在随季节变化，即随温度变化的现象，表明FHD仪观测受温度影响。分析认为，在环境噪声不变的情况下，温度变化会引起FHD仪配谐精确程度和品质因数Q值变化，使仪器选频的信噪比发生变化，从而使观测数据噪声随温度变化。要降低温度对观测数据噪声的影响，需要对仪器设计进行改进，在安装和使用时，尽量缩短FDH仪主机到探头信号线长度，且观测室建设尽量考虑保温要求。
분석국가지자태망중심2009—2014년FHD자력의삼고배경조성수거，발현존재수계절변화，즉수온도변화적현상，표명FHD의관측수온도영향。분석인위，재배경조성불변적정황하，온도변화회인기FHD의배해정학정도화품질인수Q치변화，사의기선빈적신조비발생변화，종이사관측수거조성수온도변화。요강저온도대관측수거조성적영향，수요대의기설계진행개진，재안장화사용시，진량축단FDH의주궤도탐두신호선장도，차관측실건설진량고필보온요구。
The analysis was based on the FHD magnetometer data noise of the geomagnetic networks of China from 2009 to 2014. The result shows that the data noise varies with the seasons, presents a signifi cant seasonal variation characteristic. After carefully analyzing, we can fi nd this seasonal variation of data noise was caused by temperature. The temperature can infl uence the harmonic accuracy and quality factorQ of the FHD magnetometer, and then change the signal-to-noise ratio of the frequency signal, so the data noise was changed. To reduce the effects of temperature on the observation data noise, an improvement was needed in the instrument design. In addition, under the current condition, try to shorten the length wire between host and sensors, keeping the temperature stability as much as possible are the useful methods.