Centre for Biomedical Engineering, University College London, UK.
The College of Industrial Engineering, Madrid, Spain.
Med Eng Phys. 2014 Mar;36(3):405-11. doi: 10.1016/j.medengphy.2013.09.001. Epub 2013 Sep 21.
This work describes the functions of the external, portable part of a telemetry system for powering and interrogating implantable electrical devices built within orthopaedic implants for real-time data acquisition of strain, load, temperature, humidity and other relevant data (e.g. from inertial sensors). The system contains a battery powered inductive energiser and demodulator to remotely power the implant electronics and demodulate the signals transmitted from the implanted device. Due to the housing of the internal coil, sufficient inductive coupling is obtained between the external and internal tuned circuits to enable simultaneous power and data transmission over the same inductive link. The actual performance of this system when used with one specific implant was studied, and some correspondence made to the relevant theory. Performance factors relating to both power efficiency and data reconstruction were identified.
这项工作描述了遥测系统外部、可移动部分的功能，该遥测系统用于为植入式骨科植入物内的电气设备供电和询问，以实时获取应变、负载、温度、湿度和其他相关数据（例如来自惯性传感器的数据）。该系统包含一个电池供电的感应式能量发生器和解调器，用于远程为植入式电子设备供电，并解调从植入式设备传输的信号。由于内部线圈的外壳，外部和内部调谐电路之间获得了足够的感应耦合，从而可以在同一感应链路中同时进行功率和数据传输。研究了该系统与特定植入物一起使用时的实际性能，并与相关理论进行了一些对应。确定了与功率效率和数据重建相关的性能因素。
