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1. 发明授权

US07233746B2 Wide dynamic range sensor signal processing method & circuitry for analog and digital information signals 有权
公开(公告)号：US07233746B2
公开(公告)日：2007-06-19
申请号：US10354798
申请日：2003-01-29
申请人： James N. Blake , James D. Hrabliuk , Farnoosh Rahmatian
发明人： James N. Blake , James D. Hrabliuk , Farnoosh Rahmatian
IPC分类号： H04J10/06
CPC分类号： G01R15/24 , G01R21/133
摘要： A sensor provides an analog sensor output signal that is first converted by a A/D converter, followed by a digital signal processor having a digital signal output that is converted to an analog signal by way of a D/A converter so as to provide an analog information output signal indicative of a parameter quantity intended to be sensed. An analog dither signal and/or a digital dither signal is provided for modulating the A/D converter input signal and/or D/A converter input signal, respectively, separately, or in combination, to enhance dynamic range accuracy of the resultant analog information output signal representative of the quantity of the parameter intended to be sensed.

2. 发明授权

US07633285B2 Sensors and sensing methods for three-phase, gas insulated devices 失效
标题翻译：三相气体绝缘装置的传感器和传感方法
公开(公告)号：US07633285B2
公开(公告)日：2009-12-15
申请号：US11881864
申请日：2007-07-30
申请人： Farnoosh Rahmatian , James N. Blake
发明人： Farnoosh Rahmatian , James N. Blake
IPC分类号： G01R19/00
CPC分类号： H02B13/065 , G01R15/242 , G01R31/3274 , H01H33/027
摘要： Multi-phase, gas insulated electrical switchgear with optical voltage and/or current sensors are described. Compensation for contributions to sensor readings from non-associated conductors is provided. A processor is connected to voltage and/or current sensors which are placed near conductor whose voltages and/or currents are to be measured. The processor can receive outputs from those sensors and compensate the outputs for contributions which are attributable to sources other than the conductors which are intended to be measured.
摘要翻译：描述了具有光电压和/或电流传感器的多相气体绝缘电气开关设备。提供了对非关联导体对传感器读数贡献的补偿。处理器连接到电压和/或电流传感器，其被放置在其电压和/或电流要被测量的导体附近。处理器可以从这些传感器接收输出，并补偿输出，归因于除了要测量的导体之外的源。

3. 发明授权

US07493052B2 Wide dynamic range sensor signal processing method & circuitry for analog and digital information signals 有权
标题翻译：用于模拟和数字信息信号的宽动态范围传感器信号处理方法和电路
公开(公告)号：US07493052B2
公开(公告)日：2009-02-17
申请号：US11820428
申请日：2007-06-19
申请人： James N. Blake , Farnoosh Rahmatian
发明人： James N. Blake , Farnoosh Rahmatian
IPC分类号： H04B10/06
CPC分类号： G01R15/24 , G01R21/133
摘要： A sensor provides an analog sensor output signal that is first converted by a A/D converter, followed by a digital signal processor having a digital signal output that is converted to an analog signal by way of a D/A converter so as to provide an analog information output signal indicative of a parameter quantity intended to be sensed. An analog dither signal and/or a digital dither signal is provided for modulating the A/D converter input signal and/or D/A converter input signal, respectively, separately, or in combination, to enhance dynamic range accuracy of the resultant analog information output signal representative of the quantity of the parameter intended to be sensed.
摘要翻译：传感器提供模拟传感器输出信号，该信号首先由A / D转换器转换，随后是具有数字信号输出的数字信号处理器，该数字信号处理器通过D / A转换器转换成模拟信号，从而提供模拟信息输出信号，指示要被感测的参数量。提供模拟抖动信号和/或数字抖动信号用于分别或组合地调制A / D转换器输入信号和/或D / A转换器输入信号，以增强所得模拟信号的动态范围精度输出信号表示要被感测的参数的数量。

4. 发明申请

US20080186012A1 Sensors and sensing methods for three-phase, gas insulated devices 失效
标题翻译：三相气体绝缘装置的传感器和传感方法
公开(公告)号：US20080186012A1
公开(公告)日：2008-08-07
申请号：US11881864
申请日：2007-07-30
申请人： Farnoosh Rahmatian , James N. Blake
发明人： Farnoosh Rahmatian , James N. Blake
IPC分类号： G01R19/00 , H02B7/01
CPC分类号： H02B13/065 , G01R15/242 , G01R31/3274 , H01H33/027
摘要： Multi-phase, gas insulated electrical switchgear with optical voltage and/or current sensors are described. Compensation for contributions to sensor readings from non-associated conductors is provided
摘要翻译：描述了具有光电压和/或电流传感器的多相气体绝缘电气开关设备。提供了对非关联导体对传感器读数贡献的补偿

5. 发明授权

US07038786B2 Optical interferometric sensor with measureand compensation that may selectively be used for temperature compensation and long term life degradation 有权
标题翻译：具有可选择性地用于温度补偿和长期使用寿命降低的测量和补偿的光学干涉测量传感器
公开(公告)号：US07038786B2
公开(公告)日：2006-05-02
申请号：US10271523
申请日：2002-10-15
申请人： James N. Blake
发明人： James N. Blake
IPC分类号： G01B9/02
CPC分类号： G01D5/35303
摘要： In accordance with the preset invention, an optical interferometer employed as a current sensor is provided with visibility compensation and scale factor compensation. In accordance with the present invention, the interferometer is constructed so as to propagate a pair of optical beams along a defined optical path, where the optical interferometer includes a pair of optical beams that travel along at least a portion of the defined optical path such that a phase shift is induced between the pair of optical beams in response to a measureand, for example electrical current. At least one photodetector is responsive to at least a portion of the sum of the pair of optical beams and provide a beam output signal indicate thereof. From the beam output signal, a first signal is derived that is indicative of the visibility of the interferometer. A signal processor derives from the beam output signal an output signal indicative of the bias point of the interferometer, where the bias point is indicative of the induced phase shift in response to the measurand. A compensated interferometer output signal indicative of the induced phase shift is derived as a function of the visibility signal and bias point signal. In a specific embodiment of the invention, the visibility signal may simply be the output of a signal averaging circuit which in turn may adjust the gain of the signal processing circuit.
摘要翻译：根据本发明，用作电流传感器的光学干涉仪具有可见度补偿和比例因子补偿。根据本发明，干涉仪被构造成沿着限定的光路传播一对光束，其中光学干涉仪包括沿着限定的光路的至少一部分行进的一对光束，使得响应于测量并且例如电流，在该对光束之间产生相移。至少一个光电检测器响应于该对光束的总和的至少一部分，并提供其指示的光束输出信号。从光束输出信号，导出指示干涉仪的可视性的第一信号。信号处理器从光束输出信号中导出指示干涉仪的偏置点的输出信号，其中偏置点表示响应于被测量的感应相移。作为可见度信号和偏置点信号的函数导出指示感应相移的补偿干涉仪输出信号。在本发明的具体实施例中，可见度信号可以简单地是信号平均电路的输出，信号平均电路又可以调整信号处理电路的增益。

6. 发明授权

US06188811B1 Fiber optic current sensor 有权
标题翻译：光纤电流传感器
公开(公告)号：US06188811B1
公开(公告)日：2001-02-13
申请号：US09183977
申请日：1998-10-31
申请人： James N. Blake
发明人： James N. Blake
IPC分类号： G02B600
CPC分类号： G01R33/0322 , G01R15/246
摘要： A current sensor having an optmized optical fiber coil for sensing the magnetic field of a current of wire passing by or through the coil. The coil is optimally spun such that a particular ratio of the spin rate to the intrinsic polarization beat length is such for best maintenance of the circular polarization state of the light in the coil. The coil fiber may also be Terbium doped for greater sensitivity. The phase or birefringence modulation of the light may be piezoelectric or electro-optic. A Faraday rotator may be used in place of those modulators. The system may be open loop or closed loop. The feedback scheme may be via the modulator or the phase nulling current affecting the sensing coil.
摘要翻译：一种具有优化的光纤线圈的电流传感器，用于感测由线圈通过或穿过线圈的电流的磁场。线圈被最佳旋转，使得旋转速率与本征极化拍子长度的特定比率是为了最好地维持线圈中的光的圆偏振状态。线圈光纤也可以掺杂铽，以提高灵敏度。光的相位或双折射调制可以是压电或电光。可以使用法拉第旋转器代替那些调制器。该系统可以是开环或闭环。反馈方案可以经由调制器或影响感测线圈的相位零点电流。

7. 发明授权

US4915468A Apparatus using two-mode optical waveguide with non-circular core 失效
标题翻译：使用非圆形芯的双模光波导的装置
公开(公告)号：US4915468A
公开(公告)日：1990-04-10
申请号：US245717
申请日：1988-09-16
申请人： Byoung Y. Kim , James N. Blake
发明人： Byoung Y. Kim , James N. Blake
IPC分类号： G01D5/34 , G02B6/10 , G02B6/24 , G02B6/28 , G02B6/34 , G02F1/01
CPC分类号： G02F1/0134 , G01D5/344 , G02B6/105 , G02B6/24 , G02B6/2821 , G02B6/02047 , G02B6/2726 , G02B6/29332
摘要： An apparatus utilizes a two-mode optical waveguide with a non-circular core to provide stable spatial intensity patterns in both propagation modes for light propagating therein. The light has a wavelength, and the non-circular core has cross-sectional dimensions selected such that (1) the waveguide propagates light at that wavelength in a fundamental mode and a higher order mode, and (2) substantially all of the light in the higher order mode propagates in only a single, stable intensity pattern. Embodiments of the invention include, for example, modal couplers, frequency shifters, mode selectors and interferometers. One of the interferometer embodiments may be used as a strain gauge.
摘要翻译：一种装置利用具有非圆形芯的双模式光波导以在其中传播的光的两种传播模式中提供稳定的空间强度图案。光具有波长，并且非圆形芯具有选择的截面尺寸，使得（1）波导以基模和高阶模式传播该波长处的光，以及（2）基本上所有的光在高阶模式仅传播一个稳定的强度模式。本发明的实施例包括例如模耦合器，移频器，模式选择器和干涉仪。干涉仪实施例之一可以用作应变仪。

8. 发明授权

US08922194B2 Master-slave fiber optic current sensors for differential protection schemes 有权
标题翻译：用于差动保护方案的主从光纤电流传感器
公开(公告)号：US08922194B2
公开(公告)日：2014-12-30
申请号：US13395282
申请日：2010-09-10
申请人： James N. Blake , Carl Glasow
发明人： James N. Blake , Carl Glasow
IPC分类号： G01R31/00 , G01R33/032
CPC分类号： G01R33/032
摘要： A master-slave current sensor system for measuring, for example, differential current on a transmission line is described. The slave current sensor can be periodically recalibrated (or have a compensation value re-calculated) based on the master sensor's average output, and the slave sensor can be unpowered and remote from an electronics box which receives its measurements. Health monitoring and fault location can also be performed using the master-slave optical current sensor system, optionally in conjunction with one or more voltage sensors.
摘要翻译：描述用于测量例如传输线上的差分电流的主从电流传感器系统。可以根据主传感器的平均输出，对从电流传感器进行周期性的重新校准（或重新计算补偿值），而从属传感器则可以从接收其测量的电子设备盒中取消供电和远距离。健康监测和故障定位也可以使用主从光电流传感器系统进行，可选地与一个或多个电压传感器结合使用。

9. 发明授权

US06285182B1 Electro-optic voltage sensor 有权
标题翻译：电光电压传感器
公开(公告)号：US06285182B1
公开(公告)日：2001-09-04
申请号：US09207371
申请日：1998-12-08
申请人： James N. Blake , Charles H. Lange
发明人： James N. Blake , Charles H. Lange
IPC分类号： G01R3100
CPC分类号： G01R15/24
摘要： A true dV/dt voltage sensor having no need for a ground reference for measurement. The sensor is connected at two places on the electric line to be measured. The voltage wave has a delay between the two places on the line and the difference is sensed and converted into a voltage measurement. Another approach is to connect the sensor at one place on the electric line. This approach has the second connection through a phase delay circuit that has an input connected to the same place. The delay between the one connection and the output of the phase delay circuit is sensed and converted into a voltage measurement. The sensed difference is a voltage, which is applied across a device, such as an electro-optic crystal, an integrated optic circuit (IOC) or a Mach Zehnder interferometer, which is a light medium that has a birefringence or an index of refraction that varies with changes of applied voltage. The variation of birefringence changes the polarization state of the light going through the device. The intensity of at least one polarization of light is detected and converted to an electrical signal. The intensity of the two interfering light beams from the legs of the Mach Zehnder interferometer is a function of the measured voltage. The electrical signal is integrated into a signal indicative of the magnitude of the voltage being measured on the electric line.
摘要翻译：真正的dV / dt电压传感器，不需要测量的接地参考。传感器连接在要测量的电线上的两个位置。电压波在线路上的两个位置之间具有延迟，并且差异被感测并转换成电压测量。另一种方法是将传感器连接在电线的一个位置。该方法具有通过相位延迟电路的第二连接，该相位延迟电路具有连接到相同位置的输入端。相位延迟电路的一个连接和输出之间的延迟被感测并转换成电压测量。所感测到的差异是施加在诸如电光晶体，集成光学电路（IOC）或马赫曾德尔干涉仪之类的器件上的电压，该干涉仪是具有双折射或折射率的光介质，随施加电压的变化而变化。双折射的变化改变了穿过器件的光的偏振状态。光的至少一个极化的强度被检测并转换成电信号。来自马赫曾德干涉仪的腿部的两个干涉光束的强度是测量电压的函数。电信号被集成到指示在电线上测量的电压的大小的信号中。

10. 发明授权

US4832437A Fiber optic inter-mode coupling single side band frequency shifter 失效
标题翻译：光纤互耦合单边带变频器
公开(公告)号：US4832437A
公开(公告)日：1989-05-23
申请号：US48142
申请日：1987-05-11
申请人： Byoung Y. Kim , Herbert J. Shaw , Helege E. Engan , James N. Blake
发明人： Byoung Y. Kim , Herbert J. Shaw , Helege E. Engan , James N. Blake
IPC分类号： G02B6/14 , G02B6/28 , G02F1/01
CPC分类号： G02B6/14 , G02B6/2821 , G02F1/0134
摘要： An optical fiber is subjected to a series of traveling flexural waves propagating along a length of the fiber. At least a portion of an optical signal propagating within the optical fiber in a first propagation mode is coupled to a second propagation mode. The optical signal in the second propagation mode has a frequency which is equal to either the sum of or the difference between the frequency of the optical signal in the first propagation mode and the frequency of the traveling flexural waves. The frequency of the optical signal in the second propagation mode is shifted upward or downward from the frequency of the optical signal in the first propagation mode as determined by the direction of propagation of the first optical signal with respect to the direction of propagation of the traveling flexural waves, and as also determined by whether the phase propagation velocity of the optical signal in the first propagation mode is greater than or less than the propagation velocity of the optical signal in the second propagation mode.
摘要翻译：光纤经受沿纤维长度传播的一系列行进弯曲波。以第一传播模式在光纤内传播的光信号的至少一部分耦合到第二传播模式。第二传播模式中的光信号具有等于第一传播模式中的光信号的频率与行进的弯曲波的频率的和之和的频率的频率。第二传播模式中的光信号的频率从第一传播模式中的光信号的频率向上或向下偏移，由第一光信号相对于传播的传播方向的传播方向确定弯曲波，并且还根据第一传播模式中的光信号的相位传播速度是否大于或小于第二传播模式中的光信号的传播速度来确定。

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