基于ARM的三端式磁通门传感器

摘要

传统磁通门传感器受环境变化影响较大,文中设计了一种基于ARM的三端式磁通门传感器.传感器对磁通门信号进行数字化处理,把二次谐波的积分值反馈到磁通门线圈中,最后在计算机上显示磁场大小与方向.软件取代了模拟电路中带通滤波、相敏检波和积分等环节.实验结果表明:设计的三端式磁通门传感器具有较好的稳定性和线性度.%As traditional fluxgate sensor is easily affected by the change of environment , a fluxgate sensor with three tips based on ARM was designed. The sampled signal of fluxgate was digitized and processed, and then integral quantity of the second harmonic was transmitted to the fluxgate loop. Magnetic field was displayed on computer. Software replaced band-pass filter,phasesensitive detector,and integrator etc . The results show that the fluxgate sensor with three tips can get good stability and linearity.