The development of vibrational distribution measurement system with high spatial resolution and the research on the generation mechanism of audible clicks of mechanical prosthetic heart valve

高空间分辨率振动分布测量系统研制及机械人工心脏瓣膜咔哒声产生机制研究

基本信息

  • 批准号:
    14550427
  • 负责人:
  • 金额:
    $ 2.3万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 财政年份:
    2002
  • 资助国家:
    日本
  • 起止时间:
    2002 至 2003
  • 项目状态:
    已结题

项目摘要

To clarify the mechanism of audible closing clicks generation of mechanical heart valves, research and development of vibrational distribution sensor system with high spatial resolution was made. The small optical fiber displacement sensor was developed, and by arraying this, the simultaneous measurement of vibrational distribution was realized. The displacement sensor unit, developed, consisted of optical fiber bundle for light emission and reception and focusing lens, and its diameter was less than 3 mm. The sensor unit had the displacement resolution of less than 1 micron and the spatial resolution of 5 mm in the simultaneous measurement (focused spot diameter itself was 0.5 〜 1 mm). Calibration was made by recording data of the reflected light quantity for the displacement magnitude by driving the sensor array by linear actuator, while the vibration of measuring object had stopped. By this calibrating function, the accurate vibration measurement which did not depend on reflection characteristic of the measuring object's surface was realized. Using developed sensor system, the vibrational distribution of peripheral part (made of the silicone rubber) of mechanical heart valve was measured. It became clear that the level of the vibrational component of high frequency range increased as approaching to the housing of the valve. This spatial heterogeneity of this vibrational distribution seemed to be a cause of the peculiarity of the audible clicks.
为了阐明机械心脏瓣膜关闭过程中可闻咔嗒声产生的机理,研制了具有高空间分辨率的振动分布传感器系统。研制了小型光纤位移传感器,并将其阵列化,实现了振动分布的同时测量。所开发的位移传感器单元由用于光发射和接收的光纤束和聚焦透镜组成,并且其直径小于3 mm。该传感器单元在同时测量中具有小于1 μ m的位移分辨率和5 mm的空间分辨率(聚焦光斑直径本身为0.5 μ 1 mm)。在测量对象的振动停止的同时,通过记录由线性致动器驱动传感器阵列的位移量的反射光量的数据来进行校准。利用该标定功能,实现了不依赖于被测物体表面反射特性的振动精确测量。利用研制的传感器系统,测量了机械心脏瓣膜周边部分(硅橡胶)的振动分布。很明显,高频范围的振动分量的水平随着接近阀的壳体而增加。这种振动分布的空间异质性似乎是可听见的咔嗒声的特殊性的原因。

项目成果

期刊论文数量(12)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Jun Hasegawa: "Mechanism for Audible and Ultrasonic Closing Clicks Generation of Mechanical Heart Valves"Proc.of World congress on Medical Physics and Biomedical Engineering. (2003)
长谷川淳:“机械心脏瓣膜的听觉和超声波闭合喀哒声生成机制”世界医学物理和生物医学工程大会记录。
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    0
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Jun Hasegawa, Kenji Kobayashi: "In vitro experiment of audible closing click generation. (In Japanese)"Acoustical Soc. of Japan. Suppl.. 633-634 (2002)
Jun Hasekawa、Kenji Kobayashi:“可听关闭咔嗒声生成的体外实验。(日语)”Acoustical Soc。
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    0
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長谷川 淳: "機械人工弁における可聴領域クリック発生要因の検討"日本音響学会講演論文集. 633-634 (2002)
Jun Hasekawa:“机械人工瓣膜可听范围内发出咔哒声的因素研究”日本声学学会会议记录 633-634 (2002)。
  • DOI:
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    0
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Jun Hasegawa: "Mechanism for Audible and Ultrasonic Closing Clicks Generation of Mechanical Heart Valves"Proc. of World congress on Medical Physics and Biomedical Engineering. (2003)
长谷川淳:“机械心脏瓣膜的声音和超声波关闭咔嗒声生成机制”Proc。
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  • 期刊:
  • 影响因子:
    0
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  • 通讯作者:
Jun Hasegawa, Kenji Kobayashi: "Mechanism for Audible and Ultrasonic Closing Clicks Generation of Mechanical Heart Valves"Proc. of World congress on Medical Physics and Biomedical Engineering. (2003)
Jun Hasekawa、Kenji Kobayashi:“机械心脏瓣膜的声音和超声波关闭喀哒声生成机制”Proc。
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    0
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HASEGAWA Jun其他文献

HASEGAWA Jun的其他文献

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{{ truncateString('HASEGAWA Jun', 18)}}的其他基金

Development of an Intense Micro X-ray Source Using a Capillary Lens
使用毛细管透镜开发强微 X 射线源
  • 批准号:
    23300186
  • 财政年份:
    2011
  • 资助金额:
    $ 2.3万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Systematization of skills in real-time speech-to-text interpretation for people with aphasia
失语症患者实时语音转文本翻译技能的系统化
  • 批准号:
    22653064
  • 财政年份:
    2010
  • 资助金额:
    $ 2.3万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Visualization of underwater vibrations measured with a multi-channeloptical vibration sensor
使用多通道光学振动传感器测量水下振动的可视化
  • 批准号:
    22560428
  • 财政年份:
    2010
  • 资助金额:
    $ 2.3万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Development of a Microbeam Cell Irradiation System Using Micro Glass Tubes
使用微型玻璃管开发微束细胞辐照系统
  • 批准号:
    20681004
  • 财政年份:
    2008
  • 资助金额:
    $ 2.3万
  • 项目类别:
    Grant-in-Aid for Young Scientists (A)
Study on Distributed Autonomous Power System under a Deregurated Environment
放松管制环境下的分布式自治电力系统研究
  • 批准号:
    12450106
  • 财政年份:
    2000
  • 资助金额:
    $ 2.3万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Research on Quality Control Center in Power Systems for Coming in Practice
电力系统质量控制中心的实践研究
  • 批准号:
    11555074
  • 财政年份:
    1999
  • 资助金额:
    $ 2.3万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B).
Superconducting Materials, Power Apparatus and Systems
超导材料、电力设备和系统
  • 批准号:
    08045028
  • 财政年份:
    1996
  • 资助金额:
    $ 2.3万
  • 项目类别:
    Grant-in-Aid for international Scientific Research
Basic Study on Flexible, Reliable and Intelligent Electrical Energy Delivery System
灵活可靠智能电能输送系统基础研究
  • 批准号:
    08305008
  • 财政年份:
    1996
  • 资助金额:
    $ 2.3万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Research on Synchronous Generator Control based on Nonlinear Digital Control Theory
基于非线性数字控制理论的同步发电机控制研究
  • 批准号:
    08455125
  • 财政年份:
    1996
  • 资助金额:
    $ 2.3万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Fundamental Research on Integrated Security Monitoring and Control Systems
综合安防监控系统基础研究
  • 批准号:
    60550186
  • 财政年份:
    1985
  • 资助金额:
    $ 2.3万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

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PFI-TT:用于高级成像的超表面光纤内窥镜探头
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光纤测距仪通过光学频率调制动态更新分辨率和动态范围
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  • 批准号:
    576437-2022
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相干光纤通信的自主星座整形
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光纤波导、激光器及其应用研究
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