1.1 本规程涵盖了评估相控阵超声检测仪器所用相控阵超声探头某些特性的测量程序。 1.2 本规程描述了用于获得性能数据的方法，这些性能数据可用于定义相控阵超声探头的声和电响应，相控阵超声探头包括用于超声无损检测的接触式（带或不带楔形物）和浸没式线性相控阵探头，其中心频率范围为0.5MHz至10MHz。超出此范围的频率可以使用相同的方法，但测试设备可能不同。 1.3 当本规范中规定了取决于材料的超声波值时，其基于碳钢，纵波模式的超声波传播速度为5920 m/s（±50 m/s），横波或横波模式的超声波速度为3255 m/s（±30 m/s）。 1.4 本规程描述了可在线性相控阵探头制造过程的最后阶段进行的一些表征和验证程序。本规程未描述用于验证相控阵超声仪器和探头组合系统性能的方法或验收标准。 1.5 虽然本实践旨在提供评估线性相控阵超声探头的标准化程序，但经适当修改后，可用于评估线性以外的配置；例如1.5D或2D矩阵阵列探针。 1.6 单位- 以国际单位制表示的数值应视为标准。SI单位后括号中给出的值仅供参考，不视为标准值。 1.7 本标准并不旨在解决与其使用相关的所有安全问题（如有）。 本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.8 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 本规程旨在提供评估线性相控阵超声探头的标准化程序。其目的不是定义性能和验收标准，而是提供可用于建立此类标准的数据。 5.2 实施可能需要使用设施格式的更详细的程序说明。 5.3 本指南的用户可使用所获得的测量数据来指定、描述或提供线性相控阵超声探头工作特性的采购和质量保证或服务评估的性能标准。标准实践的全部或部分可由用户决定使用。 5.4 测量主要在脉冲回波条件下进行。为了确定探头元件作为发射器或接收器的相对性能，可能需要额外的测试。 5.5 虽然这些程序涉及许多重要参数，但在特定应用中可能重要的其他参数可能不会被处理。这些可能包括功率处理能力、击穿电压、接触单元的磨损特性、射频干扰等。 5.6 必须注意确保进行了可比较的测量，并且标准实践的用户遵循类似的程序。 指定或选择的条件（如果可选）可能会影响测试结果并导致明显差异。 5.7 对某些测试结果的解释，例如频率响应曲线的形状，可能是主观的。小的不规则性可能很重要。测试结果的解释超出了本规程的范围。 5.8 使用所述程序获得的某些结果可能与相控阵超声测试仪器的测量结果不同。这些差异可能归因于实验性质或仪器电气特性的差异。 5.9 用于获得探头频率响应和时间响应的脉冲发生器必须具有足够的上升时间、持续时间和光谱含量，以在探头的整个带宽上激发探头，否则可能会导致时间失真和错误结果。

1.1 This practice covers measurement procedures for evaluating certain characteristics of phased-array ultrasonic probes that are used with phased-array ultrasonic examination instrumentation. 1.2 This practice describes means for obtaining performance data that may be used to define the acoustic and electric responses of phased-array ultrasonic probes including contact (with or without a wedge) and immersion linear phased-array probes used for ultrasonic nondestructive testing with central frequencies ranging from 0.5 MHz to 10 MHz. Frequencies outside of this range may use the same methods but the testing equipment may vary. 1.3 When ultrasonic values dependent on material are specified in this practice, they are based on carbon steel with an ultrasonic wave propagation speed of 5920 m/s (±50 m/s) for longitudinal wave modes and 3255 m/s (±30 m/s) for transverse or shear wave modes. 1.4 This practice describes some of the characterization and verification procedures that can be carried out at the end stage of the manufacturing process of linear phased array probes. This practice does not describe the methods or acceptance criteria used to verify the performance of the combined phased array ultrasonic instrument and probe system. 1.5 While this practice is intended to provide standardized procedures for evaluating linear phased-array ultrasonic probes, it may, with suitable modifications, be used for evaluation of configurations other than linear; for example, 1.5D or 2D matrix array probes. 1.6 Units— The values stated in SI units are to be regarded as the standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.7 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. 1.8 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 ====== 5.1 This practice is intended to provide standardized procedures for evaluating linear phased-array ultrasonic probes. It is not intended to define performance and acceptance criteria, but rather to provide data from which such criteria may be established. 5.2 Implementation may require more detailed procedural instructions in a format of the using facility. 5.3 The measurement data obtained may be employed by users of this guide to specify, describe, or provide performance criteria for procurement and quality assurance, or service evaluation of the operating characteristics of linear phased-array ultrasonic probes. All or portions of the standard practice may be used as determined by the user. 5.4 The measurements are made primarily under pulse-echo conditions. To determine the relative performance of a probe element as either a transmitter or a receiver may require additional tests. 5.5 While these procedures relate to many of the significant parameters, others that may be important in specific applications may not be treated. These might include power handling capability, breakdown voltage, wear properties of contact units, radio-frequency interference, and the like. 5.6 Care must be taken to ensure that comparable measurements are made and that users of the standard practice follow similar procedures. The conditions specified or selected (if optional) may affect the test results and lead to apparent differences. 5.7 Interpretation of some test results, such as the shape of the frequency response curve, may be subjective. Small irregularities may be significant. Interpretation of the test results is beyond the scope of this practice. 5.8 Certain results obtained using the procedures outlined may differ from measurements made with phased-array ultrasonic test instruments. These differences may be attributed to differences in the nature of the experiment or the electrical characteristics of the instrumentation. 5.9 The pulse generator used to obtain the frequency response and time response of the probe must have a rise time, duration, and spectral content sufficient to excite the probe over its full bandwidth, otherwise time distortion and erroneous results may result.