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Development of A Miniaturized 3-DOF Force Sensing Instrument for Robotically Assisted Retinal Microsurgery and Preliminary Results

机译:机器人辅助视网膜显微手术的微型3自由度力感测仪的研制和初步结果

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摘要

Lack of force sensing is one of the most formidable technical challenges in retinal microsurgery. Incorporating high sensitivity force sensing into the ophthalmic tools has the potential to provide the surgeon useful force feedback and to enable safe robotic assistance. This paper presents a new design of a three degrees of freedom force sensing instrument based on fiber Bragg grating sensors. A new flexure is developed to achieve high axial force sensing sensitivity and low crosstalk noise. The force sensing segment of the tool, located directly proximal to the tool tip, is ø0.9×8 mm. An extensive calibration shows that the force sensor can measure the transverse and axial force up to 21 mN with 0.5 mN and 3.3 mN accuracy, respectively. The new flexure design demonstrates the potential to improve axial force sensing. Analysis of the experiment results suggests improvements for the future iteration.
机译:缺乏力感测是视网膜显微外科手术中最严峻的技术挑战之一。将高灵敏度力感测结合到眼科工具中,有可能为外科医生提供有用的力反馈并实现安全的机器人辅助。本文提出了一种基于光纤布拉格光栅传感器的三自由度力感测仪的新设计。开发了一种新的弯曲件,以实现较高的轴向力感应灵敏度和较低的串扰噪声。刀具的力感应段直接位于刀具尖端附近,直径为ø0.9×8 mm。广泛的校准表明,力传感器可以分别以0.5 mN和3.3 mN的精度测量高达21 mN的横向和轴向力。新的挠曲设计展示了改善轴向力感测的潜力。对实验结果的分析表明了对未来迭代的改进。

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