磁致位移传感器检测线圈和驱动脉冲优化设计

摘要

在磁致伸缩式位移传感器中,检测线圈和驱动脉冲的设计直接影响整个系统的精度.基于弹性波理论和法拉第电磁感应定律,分析了加载在波导丝上的驱动脉冲和检测线圈的各项特性参数对感应波形的影响,通过试验选择了同时满足理论推导和实际应用的最佳值并进行了相关参数优化设计.经试验验证,优化后的传感器系统能够输出高信噪比的前端感应信号.%The design of the detecting coil and energizing pulse for magnetostrictive displacement sensor directly affecting the accuracy of the whole system. Based on the elastic wave theory and Faraday' s law of electromagnetic induction, the impact of the pulse loaded on the waveguide thread and various pedormance characteristic parameters of the detecting coil to the inductive waveform are analyzed. Through experiments, the optimal values that meet both the theoretical derivation and practical application are selected for conducting optimal design of related parameters. The test verifies that the sensor system being optimized is able to output front end inductive signal with high signal to noise ratio.