2.1 超声波系统简介................................................................................................................................................................ 5 2.2 超声波回波和信号处理.................................................................................................................................................... 5 2.3 传感器类型................................................................................................................................................................ 7 2.4 传感器拓扑................................................................................................................................................................ 8 2.5 传感器频率.................................................................................................................................................................... 8 2.6 传感器驱动(变压器驱动和直接驱动)和电流限制.................................................................................................... 9 2.7 脉冲计数.................................................................................................................................................................... 9 2.8 最小检测范围.................................................................................................................................................................... 10
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