利用互相关器实现的智能涡流检测系统能有效抑制干扰信号，具有很高的缺陷的检出能力和检测可靠性。

The cross correlator which realises intelligent eddy current inspection system can effectively restrain the interruptive signal and has high defects detecting ability and reliable inspection.

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传感器检出的信号送入信号处理电路后，经滤波、放大、整形及合成，成为等效于滞燃期的数字脉冲信号。

The signal read out of the sensor is to be filtered, amplified, shaped and synthesized and then transformed into a digital pulse one, which is equivalent to the ignition time delay.

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反相器(145、146)将该冲击检出信号(S22、S23)与阈值进行比较，当超过阈值时就是检出冲击。

Inverters (145), (146) compare these impact detecting signals (S22), (S23) with a threshold value and detect an impact when the signals exceeds the threshold value.

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