-
公开(公告)号：US5451776A
公开(公告)日：1995-09-19
申请号：US169474
申请日：1993-12-17
CPC分类号： G01D5/3473 , G01D5/2497
摘要： An interferometrically readable optical encoder for sensing linear position includes an optical medium movable in a linear direction and having a data storage layer, a plurality of uniformly sized sectors being defined in the layer. A linear absolute track is defined in the layer parallel to the linear direction and a plurality of absolute marks is formed in the layer in sequence along the absolute track within each sector, each such absolute mark being detectable by interferometric reflection of coherent light as representative of a binary 1 or a binary 0 and each such plurality of absolute marks defining a binary word. A linear incremental track is defined in the layer parallel to the linear direction with a series of incremental marks formed in the layer and evenly spaced along the first incremental track, each such incremental mark being detectable by interferometric reflection of coherent light. The binary word in a sector is read to identify the position of that sector in the linear direction and indicate the approximate position of the medium. The incremental marks refine the approximate position indication to provide a more precise position of the medium.
摘要翻译： 用于感测线性位置的干涉式可读光学编码器包括可沿线性方向移动并具有数据存储层的光学介质，在该层中限定多个均匀尺寸的扇区。 在平行于线性方向的层中定义线性绝对轨道，并且沿着每个扇区内的绝对轨迹顺序地在层中形成多个绝对标记，每个这样的绝对标记可以通过相干光的干涉反射来代表 二进制1或二进制0，并且每个这样的多个绝对标记定义二进制字。 在平行于线性方向的层中定义线性增量轨迹，并在层中形成一系列增量标记，并沿着第一增量轨迹均匀间隔，每个这样的增量标记可通过相干光的干涉反射检测。 读取扇区中的二进制字以识别该扇区在线性方向上的位置，并指示介质的大致位置。 增量标记改善了近似位置指示，以提供更精确的介质位置。
-
公开(公告)号：US5336884A
公开(公告)日：1994-08-09
申请号：US907412
申请日：1992-07-01
申请人： Mohsen Khoshnevisan , Jeffrey S. Schoenwald , Jonathan P. Rode , Raymond J. D. Smith , Bruce G. Kolloff , Steve Beccue
发明人： Mohsen Khoshnevisan , Jeffrey S. Schoenwald , Jonathan P. Rode , Raymond J. D. Smith , Bruce G. Kolloff , Steve Beccue
CPC分类号： G01D5/3473 , G01D5/2497
摘要： An optical encoder for sensing angular position includes a rotatable optical medium having a major surface and an axis of rotation perpendicular to the surface, with a plurality of uniformly sized angular sectors defined on the surface. An annular absolute track is defined on the surface concentric with the axis, a plurality of digital bits being formed on the surface in sequence along the absolute track within each sector. Each such bit is optically readable as a binary 1 or a binary 0, with each plurality of bits defining a binary word. A first series of optically detectable incremental marks are evenly spaced around a first incremental track on the surface. The binary word in a sector is optically read to identify the angular position of that sector and indicate the approximate angular position of the medium, while the first series of incremental marks can be optically detected to refine the approximate angular position indication. A source of light illuminates the surface along a fixed radius from the axis, while a digital track detector senses the illumination reflected from the absolute bits and a first incremental track detector senses the illumination reflected from the incremental marks. Signal processing and decoding means convert the output of the absolute track detector into a binary word and interpolate the precise angular position of the medium from the output of the first incremental track detector. An input absolute track optical fiber is connected between a absolute track optical coupler and proximate the surface of the medium, while a first input incremental track optical fiber is connected between a first incremental track optical coupler and proximate the surface. Output absolute track and first incremental track optical fibers are connected between the couplers and the track detectors for conveying reflected light from the tracks to the detectors.
摘要翻译： 用于感测角位置的光学编码器包括具有垂直于表面的主表面和旋转轴线的可旋转光学介质，其具有限定在表面上的多个均匀尺寸的角扇区。 在与轴同心的表面上限定环形绝对轨迹，沿着每个扇区内的绝对轨迹顺序地在表面上形成多个数字位。 每个这样的位是光学可读的，作为二进制1或二进制0，每个多个位定义二进制字。 第一系列可光学检测的增量标记围绕表面上的第一增量轨迹均匀间隔开。 扇区中的二进制字被光学读取以识别该扇区的角位置并且指示介质的近似角位置，而可以光学检测第一系列增量标记以改进近似角位置指示。 光源沿着轴的固定半径照亮表面，而数字轨道检测器感测从绝对位反射的照明，第一增量轨迹检测器感测从增量标记反射的照明。 信号处理和解码装置将绝对磁道检测器的输出转换为二进制字，并从第一增量磁道检测器的输出插入介质的精确角位置。 输入绝对轨迹光纤连接在绝对轨道光耦合器和介质表面附近，而第一输入增量轨道光纤连接在第一增量轨道光耦合器和靠近表面之间。 输出绝对轨道和第一增量轨道光纤连接在耦合器和轨道检测器之间，用于将来自轨道的反射光传送到检测器。
-
公开(公告)号：US5757994A
公开(公告)日：1998-05-26
申请号：US532195
申请日：1995-09-22
CPC分类号： G02B6/2817 , G02B6/2852
摘要： The optical coupler includes first, second and third port assemblies and a deflecting element. The first port assembly receives a first optical signal, the first port assembly including a first lensing element. The second port assembly emits a predetermined, transmitted portion of the first optical signal. The second port assembly includes a second lensing element. The deflecting element is positioned between the first and second port assemblies. The third port assembly includes a third lensing element. The deflecting element and the third port assembly are so positioned and arranged such that a deflected portion of the first optical signal is deflected from the deflecting element and directed through the third port assembly. The predetermined, transmitted portion of the first optical signal is directed through the second port assembly without being deflected by the deflecting element. The transmitted and deflected portions of the first optical signal are expanded and collimated while passing through the optical coupler by appropriate positioning of the lensing elements to provide efficient and accurate control of the first optical signal.
摘要翻译： 光耦合器包括第一，第二和第三端口组件和偏转元件。 第一端口组件接收第一光信号，第一端口组件包括第一透镜元件。 第二端口组件发射第一光信号的预定的，发送的部分。 第二端口组件包括第二透镜元件。 偏转元件位于第一和第二端口组件之间。 第三端口组件包括第三透镜元件。 偏转元件和第三端口组件被定位和布置成使得第一光学信号的偏转部分从偏转元件偏转并被引导通过第三端口组件。 第一光信号的预定的透射部分被引导通过第二端口组件，而不被偏转元件偏转。 第一光信号的传输和偏转部分在通过光耦合器通过透镜元件的适当定位而被扩展和准直，以提供对第一光信号的有效和准确的控制。
-
公开(公告)号：US5265475A
公开(公告)日：1993-11-30
申请号：US880383
申请日：1992-05-08
CPC分类号： G01M11/083
摘要： The invention is a failure detecting system including fiber optic cables of different lengths disposed in the vicinity of a secured region between two or more adherends, and an electro-optical analysis circuit for analyzing signals detected by the fiber optic cables. The fiber optic cables extend transversely across the connected adherends, with each cable extending a different length so that the width of the structure is divided into discrete regions. In this way, the measurable strain can be integrated over the entire length of the fiber where the fiber remains bonded to the material. The cables are coupled to laser circuitry, detector circuitry and network analyzer circuitry, and signals from the cables are processed in the network analyzer circuitry using a Fast Fourier Transform to reduce complex frequency information to time domain representation of reflection pulses. Thereafter, they are compared with reference signals to indicate the presence and degree of disbond. Upon determination that a predetermined threshold parameter has been attained or exceeded, the system can be designed to activate an alarm as well as any corrective equipment or process. The system can be embodied as a static failure detecting system, or as a real-time system capable of generating and maintaining an updatable library of reference signals.
-
公开(公告)号：US5892868A
公开(公告)日：1999-04-06
申请号：US839993
申请日：1997-04-24
CPC分类号： G02B6/2848
摘要： A fiber optic coupler having a first lens element for inputting a point source of light from an optical cable and outputting a collimated light, optically coupled to one or more lens elements for receiving an input of collimated light from the first lens element and outputting a focused point of light into a fiber optic cable. The lens elements can be gradient index lens. The lens elements can be of varying sizes such that the first lens element can optically connect to one or more smaller lens elements to couple or split optical signals for two way communication on the optical cables.
摘要翻译： 一种光纤耦合器，具有第一透镜元件，用于输入来自光缆的点光源并输出准直光，光学耦合到一个或多个透镜元件，用于接收来自第一透镜元件的准直光的输入并输出聚焦 光点进入光缆。 透镜元件可以是渐变折射率透镜。 透镜元件可以具有不同的尺寸，使得第一透镜元件可以光学地连接到一个或多个较小的透镜元件以将光信号耦合或分离以在光缆上进行双向通信。
-
公开(公告)号：US5666448A
公开(公告)日：1997-09-09
申请号：US532194
申请日：1995-09-22
CPC分类号： G02B6/32 , G02B6/2817
摘要： A variable splitting optical coupler includes a first port assembly, a second port assembly, a movable deflecting element assembly and a third port assembly. The first port assembly includes a first lensing element and receives a first optical signal. The second port assembly includes a second lensing element and emits a variable transmitted portion of the first optical signal. The movable deflecting element assembly includes a movable deflecting element positioned between the first and second port assemblies. The third port assembly includes a third leasing element. The movable deflecting element is so positionable and the third port assembly is so positioned and arranged so that a deflected portion of the first optical signal is deflected from the deflecting element and directed through the third port assembly. The variable transmitted portion of the first optical signal is directed through the second port assembly without being deflected by the deflecting element. The transmitted and deflected portions of the first optical signal are expanded and collimated, while passing through the optical coupler by appropriate positioning of the lensing elements to provide efficient and accurate control of the first optical signal. The movable deflecting element varies the relative splitting of the deflective and transmitted portions of the first optical signal.
摘要翻译： 可变分束光耦合器包括第一端口组件，第二端口组件，可移动偏转元件组件和第三端口组件。 第一端口组件包括第一透镜元件并接收第一光信号。 第二端口组件包括第二透镜元件并且发射第一光信号的可变透射部分。 可移动偏转元件组件包括位于第一和第二端口组件之间的可移动偏转元件。 第三端口组件包括第三租赁元件。 可移动偏转元件是如此定位，并且第三端口组件被如此定位和布置，使得第一光信号的偏转部分从偏转元件偏转并被引导通过第三端口组件。 第一光信号的可变透射部分被引导通过第二端口组件而不被偏转元件偏转。 第一光信号的透射和偏转部分被扩展和准直，同时通过适当定位透镜元件而通过光耦合器，以提供对第一光信号的有效和准确的控制。 可移动偏转元件改变第一光信号的偏转和发射部分的相对分裂。
-
公开(公告)号：US4733068A
公开(公告)日：1988-03-22
申请号：US848515
申请日：1986-04-07
CPC分类号： G06F3/042 , G01L1/242 , G01L1/247 , G06F3/0421
摘要： A fiber optic sensor array includes a row of transmitting optical fibers, with a column of detecting optical fibers overlapping the transmitting fibers. A planar compliant spacer separates the transmitting fibers from the detecting fibers, so that a sensor element is defined at each location where a detecting fiber overlaps a transmitting fiber. The surfaces of each transmitting fiber and each receiving fiber are modified at the location of each sensor element to increase the optical coupling between the transmitting fiber and the receiving fiber at that element. The spacer in the array includes an opening between the transmitting fiber and the detecting fiber at the location of each sensor element. A support surface is affixed to the detecting fibers opposite the compliant spacer and a protective cover layer is affixed to the transmitting fibers opposite the compliant spacer. An array of light emitting elements, with each element in the emitting array being adapted to transmit light into one of the transmitting fibers, and an array of light detecting elements, each element in the detecting array being adapted to detect light emanating from one of the detecting fibers are provided. A clock times the emission of light from each emitting element and times the detection of light at each detecting element. The clock is connected to cause each detecting element to detect light in sequence after each emitting element has emitted light.
摘要翻译： 光纤传感器阵列包括一排发送光纤，一列检测光纤与传输光纤重叠。 平面兼容间隔件将发射光纤与检测光纤分离，使得在检测光纤与发射光纤重叠的每个位置处限定传感器元件。 每个传输光纤和每个接收光纤的表面在每个传感器元件的位置被修改，以增加该元件处的发射光纤和接收光纤之间的光耦合。 阵列中的间隔物包括在每个传感器元件的位置处的发射光纤和检测光纤之间的开口。 支撑表面固定在与柔性间隔物相对的检测纤维上，并且保护性覆盖层被固定到与柔性隔离物相对的传输纤维上。 一组发光元件，其中发射阵列中的每个元件适于将光透射到发射光纤之一和光检测元件阵列中，检测阵列中的每个元件适于检测从其中的一个发出的光 提供检测纤维。 时钟对来自每个发射元件的光的发射进行时间，并且对每个检测元件的光的检测倍数。 连接时钟，使每个检测元件在每个发光元件发光后依次检测光。
-
-
-
-
-
-
搜索结果
7 条记录 (耗时 0.026 秒)
