Ambulatory monitoring system in bed for aged people

为了评估睡眠时的身体运动，开发了一种床上温度和压力监测系统，该系统由16个温度传感器和一个带有存储卡的数据记录器组成。15个温度传感器排列在一根扁平电缆上，间隔6厘米。床上这15个点的温度和由附加传感器测量的室温以预定的间隔存储在存储卡上。数据被传输到微型计算机中并进行分析。姿势和身体运动的变化可以从温度分布的变化中识别出来，并通过床上连续的温度分布的三维显示得到很好的可视化。根据温度分布的导数估计身体运动的时间。将这一估计与视频记录进行了比较，显示出很好的一致性。传感器的线性布置提供了高分辨率的温度分布…在压力测量中，系统由光学压力传感器和带A/D转换器的笔记本电脑组成。检测由于压力变化而引起的光密度的变化，并将其转换并传送到计算机。初步研究表明，头部、肩部、臀部和背部的压力分布较大。因此，头部、臀部和背部布置了三个光纤传感器。从压力的变化可以看出姿势和身体运动的变化。根据压力信号的导数估计人体运动的时间。当三个信号中的两个信号改变时，确定身体运动的时间。与录像相比，这一估计显示出很好的一致性。床上压力测量提供了睡眠时高分辨率的姿势变化。最后，研制了新型固态记录仪。该系统是全自动运行的。操作员只需打开设备，系统就会记录几个生理参数。较少

For assessment of body movements during sleep, a system for monitoring temperature and pressure in bed was developed.In temperature measurement, the system consists of 16 temperature sensors and a data logger with a memory card. Fifteen of the temperature sensors were arranged in line 6 cm apart on a flat cable. The temperatures at these 15 points in the bed, and the room temperature measured by the additional sensor, were stored on the memory card at predetermined intervals. The data were transferred into a microcomputer and analyzed. Changes in posture and body movement were recognizable from the changes in the temperature profile, and well visualized using a three-dimensional display of the successive temperature profiles in the bed. The time of body movement was estimated from the derivative of the temperature profile. Comparison between this estimation and the video recording showed good agreement. The linear arrangement of the sensors provides a high-resolution temperature profil … More e during sleep.In pressure measurement, the system consists of optical pressure sensor and a notebook personal computer with A/D converter. The changes in optical density due to changes in pressure was detected and converted and transferred to computer. Preliminary study shows the pressure distributions of head, shoulder, hip, and back were relatively high. Thus three fiber sensors were arranged head, hip and back. The changes in posture and body movement were recognizable from the changes in pressure. The time of body movement was estimated from the derivative of pressure signal. The time of body movement was determined when two of three signals were changed. In comparison with the video recording, this estimation showed good agreement. The pressure measurement in bed provides a high resolution posture change during sleep.Finally, new solid-state recorder was developed. The system operated full automatic. The operator simply switched on the device and the system was recorded several physiological parameters. Less