平衡评估压力传感阵列的高速数据采集系统设计

Design of high-speed data acquisition system for pressure sensor array in balance assessment

针对康复医学中对坐位、站位、卧位等多种精细压力分布及压力平衡评估的需要,采用高密度的压力传感阵列作为传感器,提出了一种超多通道压力传感阵列的高速数据采集方法,并给出了具体电路实现和系统设计。实验对实时采集到的压力传感阵列数据进行压力分布测试,结果显示:对于站位(足底)压力评估的2 288个传感阵列单个压力垫,系统每秒实时采集压力分布图100帧以上;对于卧位(平躺)的4个压力垫,每秒实时采集压力分布图25帧以上,均可以动态实时显示压力分布的变化,满足精细压力分布检测和评估系统的需要。

Aiming at the needs of rehabilitation medicine and pressure balance assessment in the distribution of pressure on sitting,standing and supine condition,high density pressure sensor array is used and a high speed data acquisition method by multi-channel switch is employed. Data acquired in realtime is processed and showed for test. The result shows that for single pressure pad with 2288 sensors array,above 100 frames of pressure distribution map are displayed dynamically and for 4 pressure pads there above 25 frames,which meet the need of fine pressure distribution detection and evaluation system.