École Polytechnique Fédérale de Lausanne-EPFL, 1015, Lausanne, Switzerland.
Biomed Microdevices. 2013 Oct;15(5):831-9. doi: 10.1007/s10544-013-9770-z.
This paper describes the development of a polyimide-based MEMS strain-sensing device. Finite element analysis was used to investigate an artificial knee implant and assist on device design and to optimize sensing characteristics. The sensing element of the device was fabricated using polyimide micromachining with embedded thin-metallic wires and placed into a knee prosthesis. The device was evaluated experimentally in a mechanical knee simulator using static and dynamic axial load conditions similar to those encountered in vivo. Results indicates the sensor is capable of measuring the strain associated to the total axial forces in the range of approximately 4 times body weight with a good sensitivity and accuracy for events happening within 1 s time window.
本文描述了一种基于聚酰亚胺的微机电系统应变传感装置的研制。有限元分析被用于研究人工膝关节植入物并辅助器件设计和优化传感特性。该器件的传感元件采用聚酰亚胺微加工技术制造，嵌入了薄金属丝，并放置在膝关节假体中。该器件在机械膝关节模拟器中进行了实验评估，使用类似于体内遇到的静态和动态轴向载荷条件。结果表明，该传感器能够测量与大约 4 倍体重的轴向总力相关的应变，并且在 1 秒时间窗口内发生的事件具有良好的灵敏度和准确性。
