Duffing振子在长输天然气管道泄漏检测中的应用

The application of Duffing oscillator on long distance gas pipeline leak detection

摘要:

为了及时发现天然气管道泄漏，研究分析了天然气管道泄漏后产生声波信号的频率成分，以及Duffing振子检测方法中驱动力相位、频率与相轨迹状态之间的关系。通过设置不同的驱动力相位，对天然气管道泄漏声波信号进行频率变换可以实现天然气管道泄漏的检测。现场测试结果表明该方法对多种泄漏孔径的泄漏均具有较好的检测效果，可解决天然气管道较小泄漏的检测问题。

Abstract:

In order to detect the leakage of gas pipeline ,the frequency range of acoustic signal generated by gas pipeline leakage is found. Then the relationship between Duffing oscillator’s driving force phase, frequency and phase trajectory is analyzed. Use different driving force phase of Duffing oscillator, and convert angular frequency of acoustic signal to 1 can detect the leakage of gas pipeline. The field test results show that the method has a well detection effect on the leakage of various leakage apertures, and can used to detect the small size leakage of gas pipeline.