1.1 动态称重-- 本规范描述了动态称重（WIM），即测量移动车辆的动态轮胎力并估计静态车辆的相应轮胎载荷的过程。公路车辆的车辆总重仅由作用在所有连接车辆部件的复合质量上的局部重力引起，并通过弹簧、运动阻尼器和铰链等连接器分布在车辆的轮胎之间。公路WIM系统能够估计车辆的总重量以及车辆上每个车轮组件、车轴和车轴组的轮胎所承载的部分重量，在本规范中称为载荷。 1.2 其他交通数据-- 出于某些目的，需要与行驶中称重的每辆车的速度、车道、通过日期和时间、车轴数量和间距以及分类（根据车轴排列）有关的辅助交通数据。WIM系统可以测量或计算这些交通参数，并处理、汇总、存储、显示、记录、硬拷贝和传输所得数据。此外，测量或计算的参数与选择的控制标准相比的差异可以被检测和指示，以帮助执行。除了轮胎负载信息外，WIM系统还能够生成这些交通数据的全部或指定部分。 1.3 标准规范-- 公路WIM系统通常有三个应用程序:收集统计交通数据、协助执法和执法。本规范根据应用对四种类型的WIM系统进行了分类，并详细说明了它们各自的功能、性能和用户要求。这是一种性能类型（最终产品类型）规范。作为WIM设备或服务采购过程的一部分，用户编制的任何规范中都可能包含规范的例外情况和选项，供应商可以在响应招标时提供例外情况和选择。 1.4 以英寸磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 2. 1.5 以下注意事项仅适用于试验方法部分，第节 7. ，本规范的: 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。 1.6 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。

1.1 Weigh-In-Motion— This specification describes Weigh-In-Motion (WIM), the process of measuring the dynamic tire forces of a moving vehicle and estimating the corresponding tire loads of the static vehicle. Gross vehicle weight of a highway vehicle is due only to the local force of gravity acting upon the composite mass of all connected vehicle components, and is distributed among the tires of the vehicle through connectors such as springs, motion dampers, and hinges. Highway WIM systems are capable of estimating the gross weight of a vehicle as well as the portion of this weight, called load in this specification, that is carried by the tires of each wheel assembly, axle, and axle group on the vehicle. 1.2 Other Traffic Data— Ancillary traffic data concerning the speed, lane of operation, date and time of passage, number and spacing of axles, and classification (according to axle arrangement) of each vehicle that is weighed in motion is desired for certain purposes. It is feasible for a WIM system to measure or calculate these traffic parameters and to process, summarize, store, display, record, hard-copy, and transmit the resulting data. Furthermore, differences in measured or calculated parameters as compared with selected control criteria can be detected and indicated to aid enforcement. In addition to tire load information, a WIM system is capable of producing all, or specified portions of, these traffic data. 1.3 Standard Specification— Highway WIM systems generally have three applications: collecting statistical traffic data, aiding enforcement, and enforcement. This specification classifies four types of WIM systems according to their application and details their respective functional, performance, and user requirements. It is a performance-type (end product-type) specification. Exceptions and options to the specification may be included in any specification prepared by the user as part of the procurement process for WIM equipment or services, and vendors may offer exceptions and options in responding to an invitation to bid. 1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 2 1.5 The following precautionary caveat applies only to the test method portion, Section 7 , of this specification: 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. 1.6 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.