The traditional rarefaction wave diagnosis method is improved by means of dual-page memory data acquisition apparatus and by using GPS time-label pinpointing leak location.

• 它采用双扭环技术和GPS时钟同步技术实现对传统负压波诊断系统的改进,采用假设检验和模糊数学理论对小泄漏故障负压波进行诊断。