磁通门磁强计感应回路的稳态解析模型

针对磁通门磁强计感应回路中调谐电容对灵敏度的影响,提出了磁通门感应回路的分段解析稳态模型,计算了不同调谐电容值时的感应电流波形及峰-峰值.计算与实验的对比表明,感应波形之间相关系数均大于0.98,峰-峰值p平均计算误差小于3%.调谐电容在±8%内变化时,引起的磁通门灵敏度变化为大于37%.本文提供的磁通门感应回路稳态模型能够用于精确描述输出电流性质,为研究磁通门系统的温度稳定性提供分析和参考.

An analytical steady-state model for fluxgate magnetometer detector circuit

An analytical model is developed to evaluate the influence of detector tuning capacitor effects on the sensitivity of fluxgate.The waveforms and the p-p value variation of the fluxgate output current are calculated with different tuning capacitances.The corresponding experiments are performed to measure the pick-up current in a uniform magnetic field.The correlation coefficients between the calculated and the measured waveforms are higher than 0.98,and the averaged deviation of the p-p value is less than 3%.The sensitivity varies 37% with the tuning capacitance changing within ±8%.This analytical model provides a useful tool for studying the properties of output of fluxgate efficiently and directly,and it also can be utilized for fluxgate temperature stability analyzing.