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11. 发明专利

JPS58225319A Optical fiber sensor 失效
标题翻译：光纤传感器
公开(公告)号：JPS58225319A
公开(公告)日：1983-12-27
申请号：JP10935182
申请日：1982-06-25
申请人： Yokogawa Hokushin Electric Corp
发明人： NOGUCHI MASANORI , AKIYAMA KOUJI , OOTE AKIRA
IPC分类号： G01F1/32 , G01P5/01 , G02B6/00
CPC分类号： G01F1/3263
摘要： PURPOSE:To heighten the detection sensitivity of mechanical vibration by utilizing that the speckle pattern formed on an image sensor varies by a slight force as applied to a multi-mode optical fiber. CONSTITUTION:In a sensor section SE for detecting a mechanical vibration, an eddy generating body 2 is given a mechanical force with von Karman's vortex street formed corresponding to flow velocity of a fluid to be measured to apply a force to a multi-mode optical fiber 3. An optical signal from a light source 1 is introduced to the multi-mode optical fiber 3 within the eddy generating body 2 through an optical fiber 31. Light from the eddy generating body 2 is irradiated on an image sensor 4 through an optical fiber 32 to form a speckle pattern SP. The speckle pattern SP does not vary in itself as long as there is no change in the force to be applied to the eddy generating body 2. But any change in the force causes a change in the force of the fiber 3 whereby the pattern SP itself varies and moves.
摘要翻译：目的：通过利用形成在图像传感器上的斑点图案在施加到多模光纤上的微小的力量下变化来提高机械振动的检测灵敏度。构成：在用于检测机械振动的传感器部分SE中，涡流发生体2被赋予机械力，其中von Karman的涡街形成对应于被测量流体的流速，以对多模光纤施加力来自光源1的光信号通过光纤31被引入到涡流发生体2内的多模光纤3中。来自涡流发生体2的光通过光纤被照射在图像传感器4上 32形成斑点图案SP。散斑图案SP本身不变化，只要施加到涡流发生体2的力没有变化即可。但是，任何力的变化导致光纤3的力的变化，由此图案SP本身变化和动作。

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