Schrempf Andreas, Schossleitner Gerold, Blaha Armin, Leipold Stefan
Department of Medical Device Engineering, Upper Austria University of Applied Sciences, School of Applied Health and Social Sciences, Garnisonstraße 21, 4020 Linz, Austria.
Annu Int Conf IEEE Eng Med Biol Soc. 2010;2010:2151-4. doi: 10.1109/IEMBS.2010.5626643.
A bed was equipped with four force transducers so that the location of the Center Of Mass (COM) can be computed, when the bed contains a person. The computation of the COM and its alterations in combination with the sum of all measured forces allows to compute the person's position in bed, an activity level, the resulting body weight and the corresponding weight change rate over time (overnight and long-term) as well as simply to determine whether the person is in the bed or not. The results of several overnight measurement experiments show, that the person's position in the bed (central, left, right) can be correctly detected, the proposed activity level is a promising indicator for the sleep-activity and furthermore the initial body weight as well as the nightly weight change rate can be determined.
一张床配备了四个力传感器，这样当床上有一个人时，就可以计算质心（COM）的位置。结合所有测量力的总和来计算质心及其变化，能够计算出人的在床上的位置、活动水平、体重以及随时间（过夜和长期）的相应体重变化率，还能简单地确定人是否在床上。几个过夜测量实验的结果表明，可以正确检测出人在床上的位置（中间、左边、右边），所提出的活动水平是睡眠 - 活动的一个有前景的指标，此外还能确定初始体重以及夜间体重变化率。
