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公开(公告)号：EP0517481A2
公开(公告)日：1992-12-09
申请号：EP92305040.5
申请日：1992-06-02
IPC分类号： G01R33/032 , G02F1/09 , F16N29/04 , G01N21/21 , G01N27/72
CPC分类号： G01R33/0322 , G01N33/2858 , G01V3/08
摘要： A debris monitor apparatus and method using the Faraday Effect to detect accumulation of debris on a magnetic probe is disclosed. The probe (10) contains a magnet (16) and is immersible in the fluid. As debris accumulates on the probe, the magnetic field changes. An optical sensor including magneto-optic material (22) is located within a portion of the changeable magnetic field, preferably near a node of the magnet. Optical fibers (28,30) are provided to bi-directionally address the magneto-optic material (22) with linearly polarized light. Rotation of the light polarization angle is converted into a modulation of the light's intensity. An electro-optic transducer converts the light intensity into electrical signals that indicate the quantity of debris accumulation on the probe, with a differentiated value of these signals with respect to time yielding rate of debris accumulation on the probe. Means are provided to calculate a ratio defined by the difference over sum of two bi-directionally transmitted pulses to provide a self-referenced output dependent only on the change in magnetic field caused by accumulation of debris on the probe. The changed magnetic field provides an inherent real-time memory of the accumulation of debris on the probe, which also permits multiplexed data collection.
摘要翻译： 公开了使用法拉第效应来检测碎屑在磁探头上的积聚的碎片监测装置和方法。 探针（10）包含磁体（16）并浸入流体中。 当碎屑积聚在探头上时，磁场发生变化。 包括磁光材料（22）的光学传感器位于可变磁场的一部分内，优选位于磁体的节点附近。 提供光纤（28,30）以线性偏振光双向地寻址磁光材料（22）。 将光偏振角的旋转转换为光强度的调制。 电光换能器将光强度转换成电信号，其指示探针上的碎片积聚量，这些信号相对于探针上碎屑积聚的时间产生率的差异值。 提供装置以计算由两个双向传输脉冲之和的差定义的比率，以提供仅依赖于由探针上的碎屑堆积引起的磁场变化的自参考输出。 改变的磁场提供了在探头上积累的碎片的固有的实时存储器，这也允许多路复用的数据采集。
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公开(公告)号：EP1355135A3
公开(公告)日：2004-09-01
申请号：EP03076123.3
申请日：1995-06-28
IPC分类号： G01F23/72 , G01F23/296 , G01F23/00 , G01F23/04 , G01F23/74
CPC分类号： G01F23/0061 , G01F23/04 , G01F23/2963 , G01F23/72 , G01F23/74 , Y10S250/904
摘要： Fluid level sensing apparatus for detecting the fluid level in a container. The apparatus comprises a housing adapted to be disposed in the container; a float with an associated magnetic element, where the position of the float in the container corresponds to the fluid level in the container. A magnetostrictive sensor (12) and a stick gauge are also disposed inside the housing. The sensor (12) is coupled to a control circuit (40) which includes a circuit (44) that receives electromagnetic energy (32) from a remote unit (34). In addition, the control circuit (40) includes a circuit for detecting a signal from the sensor (50) and a circuit (54) for emitting electromagnetic energy (36) having a characteristic that is variable and dependent on the fluid level in the container to a remote location (34). The information received at the remote locat ion (34) may be displayed on a screen (38) or at another suitable operator interface (64).
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公开(公告)号：EP0517481B1
公开(公告)日：1998-08-26
申请号：EP92305040.5
申请日：1992-06-02
IPC分类号： G01R33/032 , G02F1/09 , F16N29/04 , G01N21/21 , G01N27/72
CPC分类号： G01R33/0322 , G01N33/2858 , G01V3/08
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公开(公告)号：EP0517481A3
公开(公告)日：1993-09-22
申请号：EP92305040.5
申请日：1992-06-02
IPC分类号： G01R33/032 , G02F1/09 , F16N29/04 , G01N21/21 , G01N27/72
CPC分类号： G01R33/0322 , G01N33/2858 , G01V3/08
摘要： A debris monitor apparatus and method using the Faraday Effect to detect accumulation of debris on a magnetic probe is disclosed. The probe (10) contains a magnet (16) and is immersible in the fluid. As debris accumulates on the probe, the magnetic field changes. An optical sensor including magneto-optic material (22) is located within a portion of the changeable magnetic field, preferably near a node of the magnet. Optical fibers (28,30) are provided to bi-directionally address the magneto-optic material (22) with linearly polarized light. Rotation of the light polarization angle is converted into a modulation of the light's intensity. An electro-optic transducer converts the light intensity into electrical signals that indicate the quantity of debris accumulation on the probe, with a differentiated value of these signals with respect to time yielding rate of debris accumulation on the probe. Means are provided to calculate a ratio defined by the difference over sum of two bi-directionally transmitted pulses to provide a self-referenced output dependent only on the change in magnetic field caused by accumulation of debris on the probe. The changed magnetic field provides an inherent real-time memory of the accumulation of debris on the probe, which also permits multiplexed data collection.
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