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公开(公告)号：EP0359360A3
公开(公告)日：1990-11-28
申请号：EP89306028.5
申请日：1989-06-14
CPC分类号： G01B11/18 , G01D5/35351
摘要： A multi-mode fibre optic sensor for optically sensing a physical perturbation includes a multi-mode optical fibre segment (14) which accepts coherent monochromatic radiation from a suitable source (12). As the radiation is propagated in the fibre (14), the various modes form a complex interference pattern which changes in response to a physical perturbation of the fibre. A detector (16) provides an output signal to a signal processor (18) which analyzes the signal as a function of the change in intensity to provide an information signal functionally related to the perturbation.
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公开(公告)号：EP0359360A2
公开(公告)日：1990-03-21
申请号：EP89306028.5
申请日：1989-06-14
CPC分类号： G01B11/18 , G01D5/35351
摘要： A multi-mode fibre optic sensor for optically sensing a physical perturbation includes a multi-mode optical fibre segment (14) which accepts coherent monochromatic radiation from a suitable source (12). As the radiation is propagated in the fibre (14), the various modes form a complex interference pattern which changes in response to a physical perturbation of the fibre. A detector (16) provides an output signal to a signal processor (18) which analyzes the signal as a function of the change in intensity to provide an information signal functionally related to the perturbation.
摘要翻译： 用于光学感测物理扰动的多模光纤传感器包括多模光纤段（14），其接收来自适当源（12）的相干单色辐射。 当辐射在光纤（14）中传播时，各种模式形成响应于光纤的物理扰动而变化的复杂干涉图案。 检测器（16）向信号处理器（18）提供输出信号，信号处理器（18）根据强度变化来分析信号，以提供与扰动功能相关的信息信号。
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公开(公告)号：EP0341882A2
公开(公告)日：1989-11-15
申请号：EP89304390.1
申请日：1989-05-02
CPC分类号： G01D5/38
摘要： A transducer system which uses diffracted light energy in a transducer application analyzes light diffracted from a diffraction grating (20) to provide an indication of displacement or other measurable environmental changes, such a temperature changes. In one form, a diffraction grating (20) is fabricated from first and second gratings and has a step-wise change in the grating period at an integrating boundary (26). The grating (20) is illuminated with broadband light which is diffracted as a function of the irradiated position on the grating, with the wavelength of the diffracted light and the change in wavelength being a function of the diffraction grating position. In another form, a diffraction grating is provided with a variable grating period which can vary linearly, exponentially, or in accordance with some other function, and the wavelength of the diffracted light is a function of the relative displacement of the grating.
摘要翻译： 在换能器应用中使用衍射光能的换能器系统分析从衍射光栅（20）衍射的光，以提供位移或其他可测量的环境变化的指示，例如温度变化。 在一种形式中，衍射光栅（20）由第一和第二光栅制成，并且在积分边界处的光栅周期中具有逐步变化（26）。 光栅（20）被宽带光照射，其作为光栅上的照射位置的函数被衍射，衍射光的波长和波长的变化是衍射光栅位置的函数。 在另一种形式中，衍射光栅被提供有可变的光栅周期，其可以线性地，指数地地或者根据一些其他功能而变化，并且衍射光的波长是光栅的相对位移的函数。
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公开(公告)号：EP0341882A3
公开(公告)日：1990-04-11
申请号：EP89304390.1
申请日：1989-05-02
CPC分类号： G01D5/38
摘要： A transducer system which uses diffracted light energy in a transducer application analyzes light diffracted from a diffraction grating (20) to provide an indication of displacement or other measurable environmental changes, such a temperature changes. In one form, a diffraction grating (20) is fabricated from first and second gratings and has a step-wise change in the grating period at an integrating boundary (26). The grating (20) is illuminated with broadband light which is diffracted as a function of the irradiated position on the grating, with the wavelength of the diffracted light and the change in wavelength being a function of the diffraction grating position. In another form, a diffraction grating is provided with a variable grating period which can vary linearly, exponentially, or in accordance with some other function, and the wavelength of the diffracted light is a function of the relative displacement of the grating.
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