混沌弱信号检测法在超声检测中的验证

Duffing振子相变对与参考信号频差较小的周期小信号具有敏感性，对白噪声和参考信号频差较大的周期干扰信号具有免疫力，将该振子的这种特性应用于检测，称为混沌弱信号检测法。此方法在一些文献中提到，但没有验证过。本文将其应用于超声检测中，并验证了他的正确性。

Proof of the Weak Signal Detection of Chaotic Oscillator in the Ultrasonic Detection

The duffing oscillator phase transformation is sensitive to the small signal having the tiny angular frequency difference with the referential signal,and immune against the random noise and the larger interference signal having larger angular frequency difference with the referential signal.The character of the oscillator is applied in weak signal detection,this method is called the weak signal detection of chaotic oscillator.This method is referred in some papers,but it isn't validated.The method is applied in the ultrasonic detection and is proved reliable.