Solid particle leakage detection in double-wall pipes is industrially important, especially in chemical and petroleum engineering. Here, we developed vibration and acoustic sensor approaches for the characterization and comparative study of the applicability of leakage sand particle detection from the flow of gas pipes. A specific wideband vibration sensor and pressure-field microphone were selected to identify the vibro-acoustic characteristics within 50 kHz of the particle leakage. The vibro-acoustic time-behaviours and characteristic frequencies of particle leakage were observed by the time-frequency method. The leakage gas flow noise was verified by coherence analysis and minimized by a digital bandpass and band-elimination filter. Corresponding experiments were performed, and good agreement was found between the release pressures (0.1–0.3 MPa) with different leak sizes (0–8 mm) under different sand masses (120 μm) and vibro-acoustic Root-Mean-Square (RMS) levels. In the comparison of the two methods, the vibration method has a better frequency response for the leakage flow and is good for identifying whether there are particle leaks. The acoustic method has a time behaviour response and is good for establishing the relationship between the particle mass and signals. In addition, the acoustic method has frequency shift features with a better signal to noise ratio. The acoustic method lays the foundation for future work of more complex leakage detection combining the advantages of vibration and the acoustic method.

双壁管道中的固体颗粒泄漏检测在工业上很重要，特别是在化学和石油工程中。在这里，我们开发了振动和声学传感器方法，以表征和比较研究从燃气管道中检测泄漏砂粒的适用性。选择了特定的宽带振动传感器和压力场传声器，以识别50范围内的振动声特性。 kHz的颗粒泄漏。通过时频法观察了振动声的时间行为和颗粒泄漏的特征频率。通过相干分析验证了泄漏气流的噪声，并通过数字带通和带阻滤波器将其最小化。进行了相应的实验，在不同的沙量（120）下， 具有不同泄漏尺寸（0-8  mm）的释放压力（0.1-0.3 MPa）之间发现了很好的一致性。 （μm）和振动声均方根（RMS）水平。比较这两种方法，振动法对泄漏流具有较好的频率响应，有利于识别是否有颗粒泄漏。声学方法具有时间行为响应，并且对于建立粒子质量和信号之间的关系非常有用。另外，声学方法具有频移特征，具有更好的信噪比。声学方法结合了振动和声学方法的优点，为将来进行更复杂的泄漏检测奠定了基础。