1.1 本实践描述了用于演示X射线成像系统辨别能力的橡胶绳饼形标准圆盘的构造和使用。 1.2 本规程适用于用于检查充气轮胎结构一致性的直视（荧光透视）X射线成像系统和胶片、平板或纸张（射线照相）X射线图像系统。 1.3 以国际单位制表示的数值应视为标准。 1.4 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。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 所有的X射线系统都会随着效率的变化而变化，因此需要对整个操作进行检查。当环境条件得到控制并且X射线高压发生器按照规定进行调整时，这种做法将确保操作者获得优化的图像。 5.2 一些轮胎帘线材料的密度与它们所包裹的橡胶基体的密度非常接近，因此X射线系统的分辨能力对于异常检测至关重要。橡胶帘线饼盘提供了一种用于优化特定设备中的分辨率并在任何时间段内比较其性能的方法。 5.3 橡胶帘线饼盘可用于比较不同实验室X射线系统的性能。它也可以在特殊情况下用于优化特定扇形或帘线类型的系统性能，这可能是检查特定轮胎所需的。

1.1 This practice describes the construction and use of a rubber-cord pie-shaped standard disk for demonstrating the discernment capability of an X-ray imaging system. 1.2 This practice is applicable to direct viewing (fluoroscopic) X-ray imaging systems and film, plate or paper (radiographic) X-ray imaging systems that are used for checking the construction consistency of pneumatic tires. 1.3 The values stated in SI units are to be regarded as the standard. 1.4 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. 1.5 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 All X-ray systems are subject to changing efficiencies, so a practice for checking the overall operation is needed. This practice will assure the operator of an optimized image when ambient conditions are controlled and the X-ray high voltage generator is adjusted as prescribed. 5.2 The densities of some tire cord materials are very close to that of the rubber matrix in which they are enclosed, so the resolving capability of an X-ray system is critical to the detection of abnormalities. The rubber-cord pie disk provides a means for optimizing the resolving power in a particular apparatus and for comparing its performance over any period of time. 5.3 The rubber-cord pie disk can be used to compare the performances of X-ray systems in different laboratories. It can also be used in special cases to optimize system performance for a particular sector or cord-type, as may be required for examining a specific tire.