用一种非晶软磁薄膜为芯制成的磁探测器的分辨率研究

以两根非晶软磁薄膜条(0.0251.060mm3)为芯绕成差分复绕初级和次级线圈的探测器具有良好的磁敏感特性和温度特性。试验表明,这种非晶软磁薄膜为芯的磁探测器次级输出的倍频信号电平与外界磁场具有良好的线性关系。其磁分辨率可达10-1010-11T,而且在－40℃120℃的温度范围内,温度系数为0.05﹪/℃。其磁分辨率随芯的长度变长而变高,而与芯的厚度和宽度在一定的范围内基本无关。这种探测器同多晶软磁薄膜为芯的探测器相比较,具有体积小,稳定性好,耐用及温度特性好的优点。

STUDY OF THE MAGNITEC RESOLUTION OF A MAGNETIC DETECTOR MADE OF AMORPHOUS SOFT MAGNETIC FILM CORES

The magnetic detector made of aamorphous soft magnetic film cores has better characteristics. Experimental results indicate that the detector has a good linear relation between the double-frequency single voltage output and the magnetic field, a magnetic resolution of 10-10--10-11T, and a temperature coefficient of 0.05%/℃ between －40--120℃, The magnetic resolution of the detector increases with lengthening the core, but it is independent of the width and thickness of the core in a certain range. This kind of detector compared with the detector using polycrystal soft magnetic thin film has many advantages, such as smaller side, better durability, stability and temperature characteristic.