负波;空号波
MAIN OUTCOME MEASURES: Latency of positive wave/ negative wave ( P20/ N30); square root of the ratio of the amplitudes, that is, value A.
主要观察指标:正/负波潜伏期(P20/N30),波幅比率的平方根,即A值。
Negative wave signal that had leak information was changed with A/ D, then sent it to computer to identify trouble, so, leak detection and diagnosis of fuel pipe was realized.
再把含有泄漏信息的负压波信号经A/D变换后送入计算机即可判明故障,从而实现对油管泄漏的检测和诊断。
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