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EVM430-FR6043: 传感器距离变近了如何调整USS参数

Part Number: EVM430-FR6043

女生,先生,好!

同样的超声波传感器,当距离是5cm时ADC波形和测量结果都很正常,但是当距离缩小到2cm以下时就得不到正确的ADC波形如下图所示,请问应该如何调整USS中的参数来解决这个问题。谢谢!