低成本,完全和连续的3D打印电容式压力传感系统的动态表征,用于平面压力测量
Andrew T Gothard1, Jacob W Hott1, Steven R Anton1
1Dynamic and Smart Systems Laboratory, Department of Mechanical Engineering, Tennessee Technological University, Cookeville, TN 38505, USA.
研究人员开发了低成本的3D打印压力传感器用于内,以改善步态分析. 该PLA-TPU传感器展示了最佳性能,为定制,价格合理的压力传感内提供了可行的替代方案.
科学领域:
- 整形外科 整形外科 整形外科
- 生物医学工程 生物医学工程
- 材料科学 材料科学 材料科学
背景情况:
- 脚床压力分布映射对于诊断步行障碍至关重要.
- 目前的压力传感内受到成本和可定制性的限制.
- 3D打印为可定制和潜在的低成本传感器解决方案提供了一条途径.
研究的目的:
- 调查完全和连续的3D打印压力传感器的可行性.
- 为了评估不同3D打印传感器设计的性能,使用灵活和导电的纤维.
- 为了确定低成本,可定制的压力传感内的最佳传感器设计.
主要方法:
- 用热塑性聚氨 (TPU) 作为导电板的介电和导电性TPU或聚乳酸 (PLA) 进行3D打印的三种电容式压力传感器设计.
- 传感器与电容电压转换器配对.
- 动态性能使用不同频率 (1-7 Hz) 和压力 (14.33-71.65 N/cm2) 的正弦压缩试验进行了评估.
主要成果:
- 所有测试的传感器都表现出显著的hysteresis和非线性.
- 10%填充的PLA-TPU传感器显示了最高的平均灵敏度和最低的歇斯底里和线性误差.
- 平均灵敏度在11.61-20.11·10−4 V/{N/cm2}之间,对于最佳传感器来说,歇斯底里错误为11.9-31.8%和线性错误为9.0-22.3%.
结论:
- 3D打印的电容式压力传感器可用于内应用.
- PLA-TPU传感器设计为步态分析提供了一个有希望的低成本,可定制的解决方案.
- TPU的粘弹性特性和潜在的曲效应有助于传感器非线性和歇斯底里.
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