本文件提供了便于座椅几何量化和评估的尺寸定义。本文件中包含的线性、径向和角度表面尺寸旨在根据定义的关注点近似形状特征，而不是再现复杂表面轮廓所需的方法。在许多情况下，座椅表面形状上的其他点可能超过或未达到这些简单几何定义定义的边界。本文件中描述的尺寸设计为在CAD环境中测量；然而，许多维度需要HPD的位置和姿态。这可以通过使用基准或审计程序物理建立H点，或通过在CAD或建模系统内测量HPD来实现。有关这些程序，请参阅相应的文档。 开发了三种座椅几何参考点和测量:1与H点无关的简单参考点和测量。2H点相关参考点和测量值，利用HPD的座椅表征能力来量化座椅测量值。3横截面座椅装饰轮廓。为了方便和简单，许多与H-point设备相关的术语在名称中使用人体部位。然而，它们不应被解释为表明与任何或所有居住者就住宿、人的能力或舒适性进行互动的措施。H点装置不代表任何类别乘员的大小或姿势。

This document provides dimensional definitions that facilitate geometric quantification and evaluation of seats. Linear, radial, and angular surface dimensions included in this document are intended to approximate shape characteristics based on defined points of interest and not as a method needed to reproduce complex surface contours. In many cases, other points across the seat surface shape may exceed or not reach the boundary defined by these simple geometric definitions.Dimensions described in this document have been designed to be measured in a CAD environment; however, many dimensions require the HPD position and attitude. This can be obtained by physically establishing H-point using benchmark or auditing procedures OR by measuring the HPD within a CAD or modelling system. Refer to the appropriate document for these procedures.Three types of seat geometry reference points and measurements have been developed:1Simple reference points and measurements not related to H-point.2H-point dependent reference points and measurements that utilize the seat characterization capabilities of the HPD to quantify seat measurements.3Cross-sectional seat trim outlines.For convenience and simplicity, many terms associated with H-point devices use human body parts in their name. However, they should not be construed as measures that indicate interaction with any or all occupants concerning accommodation, human capabilities, or comfort.H-point devices do not represent the size or posture of any category of occupant.