基于磁通门和时域数字鉴频的磁场锁定系统

张啸阳,姚守权,徐俊成,蒋瑜

Magnetic Field Locking System Based on Fluxgate and Time Domain Digital Frequency Discrimination

Xiao-yang ZHANG,Shou-quan YAO,Jun-cheng XU,Yu JIANG

表1 不同测量周期数下，计算得到的差频信号的频率

Table 1 The frequency measurement corresponding to different measurement periods of difference frequency signal

测量周期数n 测量时间 测量时间为200 μs的最小频率精度/Hz 100 μs 200 μs 300 μs 1 10.0 kHz 5.0 kHz 3.333 kHz 0.25 5 50.0 kHz 25.0 kHz 16.667 kHz 1.25 10 100.0 kHz 50.0 kHz 33.333 kHz 2.5