无损检测 声发射检查 声发射传感器的二级校准

[中文适用范围]： 本国际标准规定了作为固体介质表面弹性波接收器的声发射传感器的二次校准方法。 该国际标准适用于实验室三级标准传感器和声发射应用传感器。 二次校准产生传感器对声发射工作中通常遇到的波（即瑞利波）的频率响应。 产生用于校准的信号的源与被测传感器 (SUT) 安装在测试块的同一表面上。 传感器的灵敏度是针对 100 kHz 至 1 MHz 范围内的激励确定的。 灵敏度值通常是在相距约 10 kHz 的频率下确定的。 校准的单位是每单位机械输入（位移、速度或加速度）的伏特。 [外文原描述]： This International Standard specifies a method for the secondary calibration of acoustic emission sensors as receivers of elastic waves at the surface of a solid medium. The International Standard is applicable to laboratory tertiary standard sensors and acoustic emission applications sensors. The secondary calibration yields the frequency response of a sensor to waves of a type normally encountered in acoustic emission work, namely Rayleigh waves. The source producing the signal used for the calibration is mounted on the same surface of a test block as the sensor under test (SUT). The sensitivity of the sensor is determined for excitation within the range of 100 kHz to 1 MHz. Sensitivity values are usually determined at frequencies approximately 10 kHz apart. The units of the calibration are volts per unit of mechanical input (displacement, velocity or acceleration).