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全膝关节置换术中韧带平衡测量系统的低功耗片上系统设计

Low-power SoC design for ligament balance measuring system in total knee arthroplasty.

作者信息

Liu Ming, Chen Hong, Zhang Xu, Zhang Chun, Jiang Hanjun, Wang Zhihua

机构信息

School of Electronics Engineering, Tsinghua University, Beijing 10084 China. lium02@mails

出版信息

Annu Int Conf IEEE Eng Med Biol Soc. 2011;2011:5860-3. doi: 10.1109/IEMBS.2011.6091449.

DOI:10.1109/IEMBS.2011.6091449
PMID:22255672
Abstract

A design of a low-power wireless System-on-Chip (SoC) for the Ligament Balance Measuring System (LBMS) in Total Knee Arthroplasty (TKA) is presented in this paper. It includes a signal conditioning circuit that can support up to 15 force sensors, a 433 MHz RF front-end for data transmission, an 8-bit low-power microprocessor, and a FIFO with a digital filter. Idle and wake-up modes are well designed to reduce the power consumption since the device should be used for the whole surgical procedure. Test results show that the signal conditioning circuit with 16-bit single line output can operate under a wide voltage range, which is from 1.2V to 3.6V. The minimal power consumption is 139μ.W@1.2V with a 200 KHz clock. Experimental results demonstrated in static and body tests are given in the paper also. The chip will be used in an aided monitoring system for Total Knee Arthroplasty in the future work.

摘要

本文介绍了一种用于全膝关节置换术（TKA）中韧带平衡测量系统（LBMS）的低功耗无线片上系统（SoC）设计。它包括一个可支持多达15个力传感器的信号调理电路、一个用于数据传输的433 MHz射频前端、一个8位低功耗微处理器以及一个带有数字滤波器的FIFO。由于该设备需用于整个手术过程，因此空闲和唤醒模式经过精心设计以降低功耗。测试结果表明，具有16位单线输出的信号调理电路可在1.2V至3.6V的宽电压范围内工作。在200 KHz时钟下，最小功耗为139μW@1.2V。本文还给出了在静态和人体测试中展示的实验结果。在未来的工作中，该芯片将用于全膝关节置换术的辅助监测系统。

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