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首页> 外文会议>32nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society >Low-power circuits design for the Wireless Force Measurement system of the Total Knee Arthroplasty
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Low-power circuits design for the Wireless Force Measurement system of the Total Knee Arthroplasty

机译：全膝关节置换术无线测力系统的低功耗电路设计

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摘要

This paper proposes a novel wireless force measurement system for the Total Knee Arthroplasty (TKA) to improve the ligament balancing procedure during TKA. The force measurement system is comprised of a Wireless Force Measurement Spacer (WFMS) and the display part. They communicate with each other by the Radio Frequency (RF) signal. The WFMS is designed to measure the force between the WFMS and the femoral component of the artificial implants and to transmit the force data wirelessly by a low power transceiver. The display part demonstrates the force data in 3D images in real time. The WFMS composes of a sensors array, a Universal Transducer Interfaces (UTIs) array, a low-power sub-threshold microprocessor and a transceiver. The sub-threshold 8-bit microprocessor is taped out with 0.18µm CMOS technology. The testing results of the microprocessor show that the leakage power of 46nW and the dynamic power of 385nW@165kHz are achieved with the operating voltage of 350mV. The test results of the system are given and the errors of the system are analyzed. The results verified the reliability of the system. The future work is to design the microprocessor and a lower power transceiver within a single chip.
机译：本文提出了一种用于全膝关节置换术（TKA）的新型无线力测量系统，以改善TKA期间的韧带平衡过程。测力系统由无线测力垫片（WFMS）和显示部分组成。它们通过射频（RF）信号相互通信。 WFMS旨在测量WFMS与人造植入物的股骨组件之间的作用力，并通过低功率收发器无线传输作用力数据。显示部分实时显示3D图像中的力数据。 WFMS由传感器阵列，通用换能器接口（UTI）阵列，低功率亚阈值微处理器和收发器组成。亚阈值8位微处理器采用0.18µm CMOS技术制成磁带。微处理器的测试结果表明，在350mV的工作电压下，可以实现46nW的泄漏功率和385nW @ 165kHz的动态功率。给出了系统的测试结果，并分析了系统的误差。结果验证了系统的可靠性。未来的工作是在单个芯片中设计微处理器和低功耗收发器。

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