T/CNGA 65-2024 Test method for the reduction rate of breast displacement in tight-fitting clothing

Scope

Scope: This document specifies the test method for the reduction rate of relative breast displacement in tight-fitting clothing. This document is applicable to testing the reduction rate of relative breast displacement when women wear tight-fitting clothing during exercise; Main technical content: 3. Terms and definitions The following terms and definitions are applicable to this document. 3.1 Relative breast displacement The displacement of the breast relative to the torso during exercise. 3.2 Relative breast displacement reduction ratio The ratio of the difference between the relative breast displacement when wearing tight-fitting clothing and the relative breast displacement when not wearing tight-fitting clothing to the relative breast displacement when not wearing tight-fitting clothing. 4. Principle On the torso and breast parts of the simulation model, representative points that can represent their movement are set. Using motion capture devices, the absolute coordinates of the representative points during movement when not wearing and wearing tight-fitting clothing are collected respectively. Through the coordinate transformation matrix, the absolute coordinates of the representative points of the breast model are converted into relative coordinates relative to the torso model. By calculating the average amplitude of the relative coordinates of the representative points of the breast model, the relative breast displacement is obtained. Then, the ratio of the relative breast displacement between the two states and the relative breast displacement when not wearing tight-fitting clothing is calculated to obtain the relative breast displacement reduction ratio.

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