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MSP430FR6043: 超声传感器测量反射信号质量

Part Number: MSP430FR6043

使用MSP430FR6043,我的应用场景是不能直接在管壁上测量密度,中间有空气。在两种介质表面,超声波因为反射损失了很大的能量,我想确定基于MSP430FR6043能够实现这种测量吗?对超声强度的测量精度能到多少,还是说只能测量时间差,另外,超声信号发射时只能选择固定频率吗,可以发频率调制超声波信号吗?