对于长期卧床患者的体重进行监测，一直是临床医护工作中重要而又较难实现的事情。以前只有少数大医院使用进口的“称重床”对特需者进行体重监测;因其昂贵价格与专用床具很难普及。本课题的目的就是研制一种便携式、组合型的以病床──也可以是椅子、平板…为“秤盘”的称重装置。由于它具有高的稳定性、重复性和优良的分辨率，特别适合对长期卧床者进行输入量（例如输液量、进食量…）、输出量（例如腹水抽吸量、排便量…）的长期监测。 Monitoring the weight of long-term bedridden patients has been an important and difficult task in clinical work. Previously, only a few large hospitals used imported “weigh beds” for weight monitoring of those who had special needs; their expensive prices and their availability were difficult to disseminate. The purpose of this project is to develop a portable and modular type of weighing platform that uses a hospital bed as a “weighing pan” for chairs, slabs, etc. Due to its high stability, reproducibility and excellent resolution, it is particularly suitable for long-term bed rest with long-term input (eg infusion, food intake ...), output (eg ascites suction, defecation ...) monitor.