1.1 本试验方法涵盖了声发射（AE）传感器的绝对校准要求。校准产生了传感器对表面波的频率响应，这种波通常在声发射工作中遇到。传感器电压响应在约10 kHz至1 MHz的离散频率间隔下确定。输入是一个既定的垂直于安装表面的动态位移。校准的单位是每单位机械输入（位移、速度或加速度）的输出电压。 1.2 单位- 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 传输标准- 本试验方法的一个目的是直接校准位移传感器，作为校准无损评估用声发射传感器的二级标准。 为此，传输标准应具有高保真度，且表现良好且易于理解。如果可以确定，则所述精度应适用于高达1 MHz的全频率范围。 注1: 只有在瞬态输入后，在从校准试块边界反射的任何波返回到传输标准之前，传输标准恢复到静止状态时，所述精度才适用( ∼ 100μs）。对于周期为时间窗顺序的低频，证明该条件是有问题的。 4.2 应用传感器- 该试验方法也可用于校准用于无损评估的声发射传感器。其中一些传感器的性能不如适用于传输标准的设备。 此类设备的规定精度适用于100 kHz至1 MHz的范围，低于100 kHz的精度较低。

1.1 This test method covers the requirements for the absolute calibration of acoustic emission (AE) sensors. The calibration yields the frequency response of a transducer to waves, at a surface, of the type normally encountered in acoustic emission work. The transducer voltage response is determined at discrete frequency intervals of approximately 10 kHz up to 1 MHz. The input is a given well-established dynamic displacement normal to the mounting surface. The units of the calibration are output voltage per unit mechanical input (displacement, velocity, or acceleration). 1.2 Units— The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 Transfer Standards— One purpose of this test method is for the direct calibration of displacement transducers for use as secondary standards for the calibration of AE sensors for use in nondestructive evaluation. For this purpose, the transfer standard should be high fidelity and very well behaved and understood. If this can be established, the stated accuracy should apply over the full frequency range up to 1 MHz. Note 1: The stated accuracy applies only if the transfer standard returns to quiescence, following the transient input, before any wave reflected from the boundary of the calibration block returns to the transfer standard ( ∼ 100 μs). For low frequencies with periods on the order of the time window, this condition is problematical to prove. 4.2 Applications Sensors— This test method may also be used for the calibration of AE sensors for use in nondestructive evaluation. Some of these sensors are less well behaved than devices suitable for a transfer standard. The stated accuracy for such devices applies in the range of 100 kHz to 1 MHz and with less accuracy below 100 kHz.