ASTM E1139-2007 连续监测来自金属压力界面的声发射的标准实施规程

标准号：ASTM E1139-2007
中文标准名称：连续监测来自金属压力界面的声发射的标准实施规程
英文标准名称：Standard Practice for Continuous Monitoring of Acoustic Emission from Metal Pressure Boundaries
标准类型：H20
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：H20
国际标准分类号：17.140.01
适用范围：p>Acoustic emission examination of a structure requires application of a mechanical or thermal stimulus. In this case, the system operating conditions provide the stimulation. During operation of the pressurized system, AE from active discontinuities such as cracks or from other acoustic sources such as leakage of high-pressure, high-temperature fluids can be detected by an instrumentation system using sensors mounted on the structure. The sensors are acoustically coupled to the surface of the structure by means of a couplant material or pressure on the interface between the sensing device and the structure. This facilitates the transmission of acoustic energy to the sensor. When the sensors are excited by acoustic emission energy, they transform the mechanical excitations into electrical signals. The signals from a detected AE source are electronically conditioned and processed to produce information relative to source location and other parameters needed for AE source characterization and evaluation.