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在目前地磁和震磁现象的观测中,无论固定台或流动观测都广泛采用核子旋进式磁力仪作为绝对观测仪器。我国多数使用的是北京地质仪器厂生产的小核旋仪。该仪器的精度为1.5r,灵敏度为0.5r。但由于主机内没有恒温装置,石英晶体振荡器的频率随温度有一定变化。过去认为这种变化很小,是可以忽略的。近年来由于高精度比测和研究工作的需要,人们日益重视这个影峋。实践证明它对仪器的一致性确有一定影峋,有的还很显著。这样研究晶振频率和温度的关系就很必要了。
In the current observations of geomagnetic and magnetocene phenomena, the nuclear precession magnetometer is widely used as an absolute observation instrument for both fixed stations and mobile observations. Most of our country is using the small nuclear spinodger produced by Beijing Geological Instrument Factory. The accuracy of the instrument is 1.5r, the sensitivity is 0.5r. However, there is no thermostat in the host device, the frequency of quartz crystal oscillator has a certain change with temperature. In the past, this change was considered negligible. In recent years, due to the need of high-precision ratio measurement and research, people pay more and more attention to this shadow. Practice has proved that it is consistent with the instrument does have some shadow, and some very significant. This study of the relationship between the crystal frequency and temperature is necessary.