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面向肠道平滑肌的微弱肌张力测试系统设计
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作者 倪伟杰 郭旭东 陈杰 《传感技术学报》 CAS CSCD 北大核心 2023年第12期1988-1992,共5页
为了研究胃肠道动力异常造成功能性胃肠病的发病机制。面向肠道器官平滑肌设计了一种高精度、高可靠性、重复性好的肌张力测试系统。测试系统主要包括:肌条夹持装置、肌张力放大装置、霍尔式力传感器、信号处理模块、数据处理与显示模... 为了研究胃肠道动力异常造成功能性胃肠病的发病机制。面向肠道器官平滑肌设计了一种高精度、高可靠性、重复性好的肌张力测试系统。测试系统主要包括:肌条夹持装置、肌张力放大装置、霍尔式力传感器、信号处理模块、数据处理与显示模块、微处理器、电源模块。为避免肌条夹持过程中预紧力过大导致断裂,而预紧力过小导致测试失效,采用了基于微处理器的自适应肌条夹持方法;肌张力放大装置采用多级杠杆结构,利用柔性铰链作为杠杆支点实现肌张力的放大,对杠杆结构进行有限元分析和优化,杠杆的放大倍数为145;采用霍尔式差分力传感器与信号处理模块对放大后的力进行测量。基于以上原理,开发了测试系统的样机,并完成了性能验证实验。实验可知:测试系统的灵敏度为34.419 V/g,线性度误差为1.627%,重复性误差为0.633%,迟滞性为3.323%。实验结果表明:测试系统能实现0.15 gn量程以内的肌张力测试,且具有较高的测量精度。 展开更多
关键词 生物力学传感器 肠道平滑肌 微弱肌张力测试 多级杠杆放大 差分式霍尔传感器
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Fiber Optic Intensity-Modulated Sensors: a Review in Biomechanics
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作者 Paulo RORIZ Antonio RAMOS +1 位作者 Jose L. SANTOS Jose A. SIMOES 《Photonic Sensors》 SCIE EI CAS 2012年第4期315-330,共16页
Fiber optic sensors have a set of properties that make them very attractive in biomechanics. However, they remain unknown to many who work in the field. Some possible causes are scarce information, few research groups... Fiber optic sensors have a set of properties that make them very attractive in biomechanics. However, they remain unknown to many who work in the field. Some possible causes are scarce information, few research groups using them in a routine basis, and even fewer companies offering turnkey and affordable solutions. Nevertheless, as optical fibers revolutionize the way of carrying data in telecommunications, a similar trend is detectable in the world of sensing. The present review aims to describe the most relevant contributions of fiber sensing in biomechanics since their introduction, from 1960s to the present, focusing on intensity-based configurations. An effort has been made to identify key researchers, research and development (R&D) groups and main applications. 展开更多
关键词 BIOMECHANICS fiber optic sensors intensity-modulated sensors
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