Development Study on the Fluxgate Magnetometer for Planetary Research Vehicle

某航天器上的磁通门磁力仪传感器暴露在太空中，要求传感器在+200℃ ~-160℃的宽温范围内工作良好，并具有精确的分辨率，为此研制了一种磁屏蔽材料宽温控制箱。该系统可在+200 ℃至-160℃之间改变温度，并具有磁性校准线圈和6通道热电偶。在第一步测试中，我们在20 ~+200℃的高温范围内测试了几种传感器芯。所用磁芯由坡莫合金薄箔制成，缠绕在两种线圈架上，线圈架由Inconel和陶瓷制成。在下一步中，我们在20℃至-160℃的低温范围内测试了这些传感器核心。与此同时，我们改进了磁强计的电子设备，并制作了一个与Bepi-Colombo水星研究飞行器类似的磁强计模型。对两种传感器在宽范围内的温度特性进行了测试，得到了良好的数据。研制了一套磁矩测量系统，对卫星部件、仪器和卫星本身的磁化强度进行了测量。(1)建立了磁屏蔽温控系统，可在+200℃ ~-160℃范围内进行温度控制。该系统是一种宽温范围的温度测试系统，可用于无磁场环境下的温度测试。(2)得到了两种传感器芯的温度特性、灵敏度、漂移、失调和噪声。结果表明，陶瓷传感器具有优良的特性。(3)高速磁矩测量系统正在为多台仪器和多颗卫星进行磁化强度的星载电磁兼容测试。

A sensor of fluxgate magnetometer on a space vehicle is exposed in space, so the sensor should be required working on a good condition in the wide range temperature from +200℃ to -160℃ with precise resolution.We developed a wide range temperature control box that is made of magnetic shield material. The system changes the temperature from +200 to -160℃, and it has a magnetic calibration coil and 6 channel thermocouples. We tested some kinds of sensor core at the range of high temperature region, from 20 to +200℃ in the first test step. The used core is made of Permalloy thin foil and it is winded around two kind bobbins that is made of Inconel and made of ceramics. In the next step, we tested these sensor cores at the low temperature range, from 20℃ to -160℃. At the same time, we improved the magnetometer electronics and we produce a model magnetometer that is similar to that of the Bepi-Colombo Mercury Research Vehicle. We obtained good data of temperature characteristics of 2 kind sensors at the wide range. And also we developed a magnetic moment measuring system and measured magnetization of satellite parts, instruments and satellite itself.In this study, we obtained the following.(1) A magnetic shielded temperature control system was built and it is able to control the temperature from +200℃ to -160℃. It is wide range temperature test system and it will be useful system for temperature test under the non magnetic field environment.(2) The temperature characteristics, sensitivity, drift, offset and noise of sensor were obtained for 2 kind sensor cores. The result of ceramic sensors showed excellent characteristics.(3) The high speed magnetic moment measuring system is working on a satellite EMC test of the magnetization for many instruments and satellites.