概括
这项研究引入了一个微型纤维布拉格格网 (FBG) 力传感器,用于微创手术 (MIS) 触摸. 新型传感器准确测量轴接触力 (CF),并显示出优异的侧向力阻力.
科学领域:
- 生物医学工程 生物医学工程
- 光学传感技术的技术
- 最少侵入性的手术
背景情况:
- 在微创手术 (MIS) 期间,准确的手术内力反对于组织相互作用至关重要.
- 现有的力传感器往往缺乏将其集成到微妙的手术仪器中所需的小型化.
- 纤维布拉格格 (FBG) 传感器为高精度,紧的力测量提供了潜力.
研究的目的:
- 开发和验证一个高精度的,基于FBG的微型力传感器,用于在MIS触摸过程中测量轴接触力 (CF).
- 为了提高传感器对轴向力的灵敏度,同时减轻侧向力和温度波动的干扰.
- 为了证明传感器在模拟手术条件下检测组织异常和区分组织硬度的能力.
主要方法:
- 设计了一种微型FBG力传感器 (直径1.5毫米),具有新的分级倾斜口弹性体结构和两根光纤用于差异测量.
- 在单独的纤维上刻有FBG,以区分轴向力和温度效应 (FBG1) 和仅温度效应 (FBG2).
- 执行校准,温度补偿和模拟触摸实验,使用模拟组织的幽灵.
主要成果:
- 传感器实现了高灵敏度 (270.809 pm/N) 在0-1.4 N范围内的轴向CF测量.
- 在温度补偿后,动态测量误差为<0.2g,误差为<0.08N.
- 与传统传感器相比,模拟触摸成功检测出异常和差异化的组织硬度,具有出色的侧向力阻力.
结论:
- 开发的微型FBG力传感器为MIS触摸提供了准确可靠的轴向CF测量.
- 传感器的设计有效地解开温度效应,并表现出强大的抵抗侧向力.
- 这项技术有望提高MIS手术的手术精度和安全性.
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