已有的输气管道泄漏检测的方法有两类There are two kinds of leakage detection methods for gas pipeline:第一类:基于磁通、涡流、摄像等通球技术的智能检测法。The first kind: tube intelligent detection method based on magnetic flux, eddy current, camera, etc.第二类:基于管线压力、温度、流量、声音以及震动等物理参数发生变化的外部检测法。The second category: external detection method based on physical parameters such as pipeline pressure, temperature, flow, sound and vibration.