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公开(公告)号：EP0286894A3
公开(公告)日：1990-08-08
申请号：EP88104942.3
申请日：1988-03-28
发明人： Park, Eric D. , Gat, Erann
IPC分类号： H04J15/00
CPC分类号： H04J14/08
摘要： A system and method is provided for wavelength multiplexing optical signals in a multiple channel fiber optic sensor. Light from a broad band source is transmitted through a single fiber optic source link to a source optical splitter, where the light is divided among a plurality of source channel fibers corresponding to each information channel of the transducer. Light from the source channel fibers is modulated by the transducer information channels and is encoded by a first set of narrow band interference filters. Modulated, encoded light from each channel is transmitted by a return channel fiber to an optical mixer, where the modulated encoded light from all channels is combined into a single return fiber optic link. A return optical splitter divides the combined. modulated encoded light among a plurality of dedector fibers. Light from the detector fibers is decoded by a second set of interference filters corresponding to the first set of interference filters so that each detector receives and detects light modulated by one transducer information channel.
摘要翻译： 提供了一种用于在多通道光纤传感器中波长复用光信号的系统和方法。 来自宽带源的光通过单个光纤源链路传输到源光分路器，其中光在与换能器的每个信息通道对应的多个源通道光纤之间分配。 源信道光纤的光由传感器信息信道调制，并由第一组窄带干扰滤波器编码。 来自每个通道的调制编码的光通过返回通道光纤传输到光学混合器，其中来自所有通道的调制编码光被组合成单个返回光纤链路。 返回光分路器将组合分频。 在多个发光体之间调制编码的光。 来自检测器光纤的光由对应于第一组干涉滤波器的第二组干涉滤波器解码，使得每个检测器接收并检测由一个换能器信息信道调制的光。
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2.发明公开
公开(公告)号：EP0286894A2
公开(公告)日：1988-10-19
申请号：EP88104942.3
申请日：1988-03-28
发明人： Park, Eric D. , Gat, Erann
IPC分类号： H04J15/00
CPC分类号： H04J14/08
摘要： A system and method is provided for wavelength multiplexing optical signals in a multiple channel fiber optic sensor. Light from a broad band source is transmitted through a single fiber optic source link to a source optical splitter, where the light is divided among a plurality of source channel fibers corresponding to each information channel of the transducer. Light from the source channel fibers is modulated by the transducer information channels and is encoded by a first set of narrow band interference filters. Modulated, encoded light from each channel is transmitted by a return channel fiber to an optical mixer, where the modulated encoded light from all channels is combined into a single return fiber optic link. A return optical splitter divides the combined. modulated encoded light among a plurality of dedector fibers. Light from the detector fibers is decoded by a second set of interference filters corresponding to the first set of interference filters so that each detector receives and detects light modulated by one transducer information channel.
摘要翻译： 提供了一种用于在多通道光纤传感器中波长复用光信号的系统和方法。 来自宽带源的光通过单个光纤源链路传输到源光分路器，其中光在与换能器的每个信息通道对应的多个源通道光纤之间分配。 源信道光纤的光由传感器信息信道调制，并由第一组窄带干扰滤波器编码。 来自每个通道的调制编码的光通过返回通道光纤传输到光学混合器，其中来自所有通道的调制编码光被组合成单个返回光纤链路。 返回光分路器将组合分频。 在多个发光体之间调制编码的光。 来自检测器光纤的光由对应于第一组干涉滤波器的第二组干涉滤波器解码，使得每个检测器接收并检测由一个换能器信息信道调制的光。
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3.发明公开Fiber optic sensing system and method across working air gap of an electric motor 失效光纤传感系统和方法通过电动机的工作空气隙
公开(公告)号：EP0285053A3
公开(公告)日：1990-03-14
申请号：EP88104943.1
申请日：1988-03-28
发明人： Park, Eric D.
CPC分类号： H02K29/10 , G01D5/268 , G01D5/34715 , H02K11/00
摘要： An optical sensing system and method for sensing across the working air gap of an electric motor is described. The sensing system (10) includes a light source (12) to provide optical energy, source fiber optic means (14) to transmit the optical energy to an optical head (16) mounted at the air gap (18), a code pattern (26) mounted on the motor rotor to modulate the optical energy, return fiber optic means (22) to transmit the modulated optical energy to one or more detectors (24), and information processing and motor control electronics (25) to analyze data from detectors (24) and control the motor based thereon. Multi-channel information sensing with multiplexing is also disclosed.
摘要翻译： 描述了用于感测跨越电动机的工作气隙的光学传感系统和方法。 感测系统（10）包括用于提供光能的光源（12），用于将光能传输到安装在气隙（18）处的光学头（16）的源光纤装置（14），代码图案 26），其安装在所述电动机转子上以调制所述光能，使所述光纤装置（22）将调制的光能传递到一个或多个检测器（24），以及信息处理和电动机控制电路（25）以分析来自检测器 （24），并基于此控制马达。 还公开了具有复用的多信道信息感测。
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公开(公告)号：EP0262670A1
公开(公告)日：1988-04-06
申请号：EP87114320.2
申请日：1987-10-01
发明人： Park, Eric D.
CPC分类号： G01F23/2922 , Y10S250/904
摘要： An optical fluid sensor 20 with a light emitter 2, a photodetector 11 and a sensing tip element 15 which is optically connected by first optical fiber means (4) to the light emitter 2 and by second otpical fiber means (9) to the photodetector 11 is disclosed, said sensing tip element 15 being provided with a coating 14 of a material impermeable by the fluid to be sensed and resistant to the formation of fluid film or droplets thereon thereby reducing undesirable effects or false readings. By constantly monitoring low-level light returned to the photodetector 11 under all operating conditions, the optical fluid sensor of the invention provides a fault finding system.
摘要翻译： 具有光发射器2，光电检测器11和感测尖端元件15的光学流体传感器20，其通过第一光纤装置（4）与光发射器2光学连接，并且通过第二光纤装置（9）光耦合到光电检测器11 所述感测尖端元件15设置有由待感测的流体不可渗透的材料的涂层14，并且能够抵抗在其上形成流体膜或液滴，从而减少不期望的影响或错误的读数。 通过不断地监视在所有操作条件下返回到光电检测器11的低电平光，本发明的光学流体传感器提供故障查找系统。
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公开(公告)号：EP0262670B1
公开(公告)日：1991-04-10
申请号：EP87114320.2
申请日：1987-10-01
发明人： Park, Eric D.
CPC分类号： G01F23/2922 , Y10S250/904
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6.发明公开Error detection system for two-state fiber optic sensors 失效Fehlererkennungssystemfürfiberoptische Sensoren mit zweiZuständen。
公开(公告)号：EP0295489A1
公开(公告)日：1988-12-21
申请号：EP88108674.8
申请日：1988-05-31
发明人： Gat, Erann , Park, Eric D. , Mathis, Talmage
IPC分类号： G01D18/00
CPC分类号： G01F23/0069 , G01D5/268 , G01F23/2925 , H04L25/06
摘要： An error detection system is provided for a two-state fiber optic sensor (10) . An amplified photodetector signal is sampled by each of an ON-OFF threshold detector (24) , a disconnect threshold detector (26) and a slope detector (28). The ON-OFF threshold detector (24) monitors whether the detector signal is above or below an ON-OFF threshold value corresponding to the parameter being sensed and activates an appropriate sensor output. The disconnect threshold detector (26) monitors the constant low level detector signal corresponding to low level light received by the detector even when the threshold detector (24) is in the OFF state, and triggers an error signal should the detector signal fall below a disconnect threshold value. The slope detector (28) monitors the rate of change of the detector signal. Where the detector signal changes rapidly, such as during normal sensor switching, the slope detector (28) permits the detector signal to pass to a latch (30), which retains in memory the last detector signal which changed rapidly enough to trigger the slope detector (28) and produces an output corresponding to the ON-OFF status of the last detector signal in memory. A slowly changing detector signal will not trigger the slope detector (28). Where the ouputs of the ON-OFF threshold detector (24) and the latch (30) differ, a comparator (34) triggers an error signal.
摘要翻译： 为双状态光纤传感器（10）提供错误检测系统。 通过ON-OFF阈值检测器（24），断开阈值检测器（26）和斜率检测器（28）中的每一个对放大的光检测器信号进行采样。 ON-OFF阈值检测器（24）监视检测器信号是否高于或低于与被检测的参数相对应的ON-OFF阈值，并激活适当的传感器输出。 断开阈值检测器（26）即使在阈值检测器（24）处于OFF状态时也监视与检测器接收到的低电平光相对应的恒定低电平检测器信号，并且如果检测器信号低于断开 阈值。 斜率检测器（28）监视检测器信号的变化率。 在检测器信号快速变化的情况下，例如在正常传感器切换期间，斜率检测器（28）允许检测器信号传递到锁存器（30），锁存器保持存储器中最后检测器信号，其快速变化以触发斜率检测器 （28），并产生对应于存储器中最后检测器信号的ON-OFF状态的输出。 缓慢变化的检测器信号将不会触发斜率检测器（28）。 在ON-OFF阈值检测器（24）和锁存器（30）的输出不同的地方，比较器（34）触发错误信号。
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7.发明公开Fiber optic sensing system and method across working air gap of an electric motor 失效光纤选择系统和方法überder lichten Weite eines elektrischen Motors。
公开(公告)号：EP0285053A2
公开(公告)日：1988-10-05
申请号：EP88104943.1
申请日：1988-03-28
发明人： Park, Eric D.
CPC分类号： H02K29/10 , G01D5/268 , G01D5/34715 , H02K11/00
摘要： An optical sensing system and method for sensing across the working air gap of an electric motor is described. The sensing system (10) includes a light source (12) to provide optical energy, source fiber optic means (14) to transmit the optical energy to an optical head (16) mounted at the air gap (18), a code pattern (26) mounted on the motor rotor to modulate the optical energy, return fiber optic means (22) to transmit the modulated optical energy to one or more detectors (24), and information processing and motor control electronics (25) to analyze data from detectors (24) and control the motor based thereon. Multi-channel information sensing with multiplexing is also disclosed.
摘要翻译： 描述了用于感测跨越电动机的工作气隙的光学传感系统和方法。 感测系统（10）包括用于提供光能的光源（12），用于将光能传输到安装在气隙（18）处的光学头（16）的源光纤装置（14），代码图案 26），其安装在所述电动机转子上以调制所述光能，使所述光纤装置（22）将调制的光能传递到一个或多个检测器（24），以及信息处理和电动机控制电路（25）以分析来自检测器 （24），并基于此控制马达。 还公开了具有复用的多信道信息感测。
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