The stability of breast plays an important role in the comfort of women’s movement. Women with sagging breasts are faced with more displacement due to the weakened breast internal support. The purpose of this study is to measure the dynamic 3D displacement of sagging breasts. Because of the sagging breast particularity, it is difficult to obtain all the data accurately by the traditional photoelectric capturing system. In this paper, multiple 3-Axes accelerometer sensors are used to measure the acceleration value of the specific points. Besides, the sensors integrated with 3-axes gyroscope which can collect the gyro data at the same time. The obtained accelerometer and gyroscope data will be transferred to the body coordinate from the sensor measuring coordinate. MATLAB will be used to analyze the collected data, and 2D and 3D point Cloud will be carried out. The maximum amplitude and whole picture of trajectory will be calculated, and the dynamic moving results of breast will have a general comparison of different points. The whole picture of sagging breast moving status can help bra designers improve wearing comfortable sensation, and the study can offer a new method for reference.

乳房的稳定性在女性运动舒适度中起着重要作用。由于乳房内部支撑减弱，乳房下垂的女性面临着更多的移位。这项研究的目的是测量下垂乳房的动态3D位移。由于乳房的下垂性，传统的光电捕获系统很难准确地获得所有数据。在本文中，多个3轴加速度传感器用于测量特定点的加速度值。此外，与三轴陀螺仪集成的传感器可以同时收集陀螺仪数据。所获得的加速度计和陀螺仪数据将从传感器测量坐标传输到身体坐标。MATLAB将用于分析收集的数据，然后将执行2D和3D点云。将计算最大振幅和整个轨迹图，并且乳房的动态运动结果将对不同点进行总体比较。下垂的乳房运动状态的整体图可以帮助胸罩设计者改善穿着舒适感，这项研究可以提供一种新的参考方法。