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首页> 外文期刊>Journal of Sensors >Design and Evaluation of a Fiber-Optic Grip Force Sensor with Compliant 3D-Printable Structure for (f)MRI Applications
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Design and Evaluation of a Fiber-Optic Grip Force Sensor with Compliant 3D-Printable Structure for (f)MRI Applications

机译：用于（f）MRI应用的具有3D可打印结构的光纤握力传感器的设计和评估

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摘要

Grip force sensors compatible with magnetic resonance imaging (MRI) are used in human motor control and decision-making research, providing objective and sensitive behavioral outcome measures. Commercial sensors are expensive, cover limited force ranges, rely on pneumatic force transmission that cannot detect fast force changes, or are electrically active, which increases the risk of electromagnetic interference. We present the design and evaluation of a low-cost, 3D-printed, inherently MRI-compatible grip force sensor based on a commercial intensity-based fiber-optic sensor. A compliant monobloc structure with flexible hinges transduces grip force to a linear displacement captured by the fiber-optic sensor. The structure can easily be adapted for different force ranges by changing the hinge thickness. A prototype designed for forces up to 800 N was manufactured and showed a highly linear behavior (nonlinearity of 2.37%) and an accuracy of 1.57% in a range between zero and 500 N. It can be printed and assembled within one day and for less than $300. Accurate performance was confirmed, both inside and outside a 3 T MRI scanner within a pilot study. Given its simple design allowing for customization of sensing properties and ergonomics for different applications and requirements, the proposed grip force handle offers researchers a valuable scientific tool.
机译：与磁共振成像（MRI）兼容的握力传感器用于人体运动控制和决策研究，可提供客观和敏感的行为结果度量。商用传感器价格昂贵，覆盖有限的力范围，依靠无法检测快速力变化的气动传递或具有电活性，从而增加了电磁干扰的风险。我们提出了一种基于商业强度的光纤传感器的低成本，3D打印，固有地与MRI兼容的握力传感器的设计和评估。具有柔性铰链的顺应性整体结构将抓握力转换为由光纤传感器捕获的线性位移。通过更改铰链厚度，可以轻松地使结构适应不同的作用力范围。制造了一个设计用于最大800 N的力的原型，该原型在0到500 N的范围内表现出高度的线性行为（非线性为2.37％）和精度为1.57％。可以在一天之内完成印刷和组装超过$ 300。在初步研究中，在3 T MRI扫描仪的内部和外部都确认了准确的性能。鉴于其简单的设计可以针对不同的应用和要求定制感测特性和人体工程学，因此所提出的握力手柄为研究人员提供了有价值的科学工具。

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