IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0931446
(2004-09-01)
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발명자
/ 주소 |
- Blake,Jame N.
- Rahmatian,Farnoosh
- Rose,Allen H.
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출원인 / 주소 |
- NxtPhase T &
- D Corporation
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인용정보 |
피인용 횟수 :
2 인용 특허 :
14 |
초록
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A time division multiplexed optical voltage measuring system includes an optical voltage sensing system module including, (i) a plurality of optical sensors where each sensor is responsive to an input interrogation light wave, and (ii) one or more optical outputs affected by sensed electric field th
A time division multiplexed optical voltage measuring system includes an optical voltage sensing system module including, (i) a plurality of optical sensors where each sensor is responsive to an input interrogation light wave, and (ii) one or more optical outputs affected by sensed electric field thereat. The optical voltage sensing system module includes an optical circuit arrangement having (i) an input for receiving a module specific pulsed light wave derived from a primary pulsed light wave from a remote light source, and (ii) arranged such that each of the plurality of optical sensors receives an interrogation pulsed light wave. The optical circuit arrangement of the optical voltage sensing system module further includes at least one optical wave combiner for combining like-kind of outputs from all of the plurality of optical sensors. The optical circuit is arranged such that the pulsed light waves from the outputs of different optical sensors arrive at the optical wave combiner at differing times. In turn, the output of the combiner is passed to a detector and signal processor at a remote location for signal processing, and providing a measurement of the voltage intended to be measured. In a specific embodiment, each voltage sensing modules is arranged integral with a high voltage insulator column of a multi-phase power line system.
대표청구항
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We claim: 1. A time division multiplexed optical voltage measuring system comprising: a light source for generating a primary pulsed light wave having a selected pulse width and duty cycle; an optical voltage sensing system module including, (i) a plurality of optical sensors, N, wherein each nth s
We claim: 1. A time division multiplexed optical voltage measuring system comprising: a light source for generating a primary pulsed light wave having a selected pulse width and duty cycle; an optical voltage sensing system module including, (i) a plurality of optical sensors, N, wherein each nth sensor includes, (a) a receiving input for receiving an interrogation light wave, and (b) at least one emitting output for emitting a first sensor output light wave having optical characteristics derived from said interrogation light wave and in response to any sensed electric field thereat, and where said plurality of optical sensors are spatially located at a location where a voltage is intended to be measured, and where said voltage intended to be measured is a function of the sensor output light waves from selected ones of the N optical sensors, (ii) an optical circuit arrangement having, an input for receiving a module specific pulsed light wave derived from said primary pulsed light wave, and arranged such that each of said N optical sensors receives an interrogation pulsed light wave derived from said module specific pulsed light wave at differing times, and (iii) at least a first optical wave combiner having at least N inputs, where an nth input is coupled to a corresponding emitting output of an nth sensor for receiving a sensor output light wave therefrom; at least a first detector having, a detector input coupled to said first optical wave combiner output, and a detector output for producing an electrical detector output signal representative of any light at its input; and an electrical signal processor responsive to said electrical detector output signal for deriving said voltage intended to be measured as a function of received sensor output light waves from said plurality of sensors. 2. The time division multiplex optical voltage measuring system of claim 1 wherein said optical circuit arrangement includes at least a first optical splitter having an input for receiving said module specific pulsed light wave, and having a plurality of outputs for providing pulsed secondary light waves from which said interrogation pulsed light waves are derived. 3. The time division multiplex optical voltage measuring system of claim 2 where a first output of said first optical splitter is coupled to an input of a first one of said N optical sensors through a first light conduit of known length, and a second output of said first optical splitter is coupled to an input of a second one of said N optical sensors through a second light conduit of known length greater than said first light conduit so as to impose a fixed delay in the arrival of light pulses at the inputs of said first and second optical sensors. 4. The time division multiplex optical voltage measuring system of claim 3 where a third output of said first optical splitter is coupled to an input of a third one of said N optical sensors through a third light conduit of known length greater than said second light conduit so as to impose a fixed delay in the arrival of light pulses at the input of said third optical sensor relative to said second optical sensor. 5. The time division multiplexed optical voltage measuring system of claim 2 where: a first output of said first optical splitter is coupled to an input of a first one of said N optical sensors through a first light conduit of known length; a second output of said first optical splitter is coupled to an input of a second optical splitter through a second light conduit of known length greater than said first light conduit so as to impose a first fixed delay; and a first output of said second optical splitter is coupled to an input of a second one of said N optical sensors through a third light conduit of known length, and a second output of said second optical splitter is coupled to an input of a third one of said N optical sensors through a fourth light conduit of known length greater than said third light conduit so as to impose a fixed delay in the arrival of light pulses at the inputs of said second and third optical sensors relative to a light pulse at said first optical sensor. 6. A time division multiplexed optical voltage measuring system for a multi-phase high voltage power line system comprising: a light source for generating a primary pulsed light wave having a selected pulse width and duty cycle; a plurality of voltage sensing system modules, J, where a jth one is adapted to measure a jth voltage measure and related to said multi-phase system, where each of said voltage sensing modules includes, (i) a plurality of optical sensors, N, wherein each nth sensor includes, (a) a receiving input for receiving an interrogation light wave, and (b) at least one emitting output for emitting a first sensor output light wave having optical characteristics derived from said interrogation light wave and in response to any sensed electric field thereat, and where said plurality of optical sensors are spatially located at a location where a voltage is intended to be measured, and where said voltage intended to be measured is a function of the sensor output light waves from selected ones of the N optical sensors, (ii) an optical circuit arrangement having, an input for receiving a module specific pulsed light wave derived from said primary pulsed light wave, and occurring at a different time than that received by the other ones of said voltage sensing system modules, and arranged such that each of said N optical sensors receives an interrogation pulsed light wave derived from said module specific pulsed light wave at differing times, and (iii) at least a first optical wave combiner having at least N inputs, where an nth input is coupled to a corresponding emitting output of an nth sensor through a corresponding nth light conduit for receiving a sensor output light wave therefrom, and an output for emitting any light received at its inputs thereof; at least a first detector having, a detector input coupled to said first optical wave combiner output of each of said voltage sensing modules, and a detector output for producing an electrical detector output signal representative of any light at its input; and an electrical signal processor responsive to said electrical detector output signal for deriving said voltage intended to be measured at each location of said voltage sensing modules as a function of received sensor output light waves from said plurality of sensors associated with a specific one module. 7. A time division multiplex optical voltage measuring system of claim 6 further including an optical signal management router including an optical circuit arrangement for providing each of said plurality of voltage sensing modules with a module specific pulsed light wave derived from said primary pulsed optical wave such that each of said voltage sensing modules receives their respective module specific pulsed light wave at differing times. 8. A time division multiplexed optical voltage measuring system of claim 7 wherein said optical signal management router includes at least one optical splitter having, (i) an input for receiving a signal derived from said primary pulsed light wave, (ii) a first output coupled to the input of a first one of said plurality of voltage sensing system modules for receiving a module specific pulsed light wave through a first light conduit, and (iii) a second output coupled to the input of a second one of said plurality of voltage sensing system modules for receiving a module specific pulsed light wave through a second light conduit including an imposed fixed delay X1 for delaying the arrival of light pulses at the inputs of said first and second voltage sensing system modules relative to each other. 9. A time division multiplexed optical voltage measuring system of claim 7 wherein said optical signal management router includes: at least first and second optical splitters where, said first optical splitter includes, (i) an input for receiving a signal derived from said primary pulsed light wave, (ii) a first output coupled to the input of a first one of said plurality of voltage sensing system modules through a first light conduit for receiving a module specific pulsed light wave, and (iii) a second output coupled to an input of said second optical splitter through an imposed first time delay; and said second optical splitter includes, (i) a first output coupled to the input of a second one of said plurality of voltage sensing system modules through a second light conduit for receiving a module specific pulsed light wave, and (iii) a second output coupled to the input of a third one of said plurality of voltage sensing system modules through a third light conduit for receiving a module specific pulsed light wave. 10. The time division multiplex optical voltage measuring system of claim 6 further including an optical signal management router including at least one optical combiner having, (i) M inputs, where each mth input is coupled to the output of said first optical combiner associated with a mutually exclusive one of said plurality of voltage sensing system modules, (ii) an output coupled to said first detector input. 11. The time division multiplexed optical voltage measuring system of claim 10 wherein: each of said optical sensors includes a second emitting output for emitting a second sensor output wave having different optical characteristics derived from said interrogation light wave and in response to any sensed electric field thereat in relation to said first sensor output wave; said voltage sensing module includes a second optical wave combiner having at least N inputs, where an nth input is coupled to a corresponding second emitting output of an nth sensor through a corresponding nth light conduit for receiving said second sensor output light wave therefrom, and an output for emitting any light received at its inputs thereof; said optical signal management router further includes a second optical combiner having, (i) Q inputs where each qth input is coupled to a mutually exclusive output of a said second optical combiner associated with a respective one of said plurality of voltage sensing system modules, and (ii) an output; and said optical voltage measuring system includes a second detector having, a detector input coupled to said second optical wave combiner output of optical signal management router, and a detector output for producing an electrical detector output signal representative of any light at its input. 12. The time division multiplexed optical voltage measuring system of claim 10 wherein: each of said optical sensors includes a second emitting output for emitting a second sensor output wave having different optical characteristics derived from said interrogation light wave and in response to any sensed electric field thereat in relation to said first sensor output wave; said voltage sensing module includes second optical wave combiner having at least N inputs, where an nth input is coupled to a corresponding second emitting output of an nth sensor through a corresponding nth light conduit for receiving said second sensor output light wave therefrom, and an output for emitting any light received at its inputs thereof; said optical signal combiner of said optical signal management router further includes Q additional inputs where each qth input is coupled to the output of said second optical combiner associated with a mutually exclusive one of said plurality of voltage sensing system modules; and where said optical signals associated with each signal combiner of each voltage sensing module arrive at the inputs of said optical signal combiner of said router at differing times. 13. The time division multiplex optical voltage measuring system of claim 12 wherein said signal processor selectively derives each voltage measurement associated with each voltage sensing modules as a function of said electrical detector output signal. 14. A time division multiplex optical voltage measuring system for a multi-phase high voltage power line system for measuring the voltage associated with a transmission line of the multi-phase high voltage power line system comprising: a light source for generating a primary pulsed light wave having a selected pulse width and duty cycle; a plurality of voltage sensing system modules, J, each having an optical sensing system structure including, (i) a plurality of optical sensors, N, wherein each nth sensor includes, (a) a receiving input for receiving an interrogation light wave, and (b) at least one emitting output for emitting a first sensor output light wave having optical characteristics derived from said interrogation light wave and in response to any sensed electric field thereat, and where said plurality of optical sensors are spatially located at a location where a voltage is intended to be measured, and where said voltage intended to be measured is a function of the sensor output light waves from selected ones of the N optical sensors, at least a first module optical wave splitter having, an input adapted to be coupled to a light conduit for receiving a module specific pulsed light wave, and a plurality of outputs for passing a portion of said received module specific pulsed light wave, an input optical circuit arrangement including, a plurality of sensor light conduits, N, each having, an output end thereof coupled to a receiving input of a mutually exclusive one of the N plurality of sensors, an input end adapted to receive at least a portion of said module specific pulsed light wave from said first module optical wave splitter, and said input optical circuit arrangement arranged such that a portion of said module specific pulsed light wave is received at said receiving input of each of said N optical sensors at differing times, and at least a first optical wave combiner having, at least N inputs, where an nth input is coupled to the emitting output of a corresponding nth sensor, and an output for passing therefrom any received light waves from said optical sensors; an optical signal management router operative for routing optical signals to and from the plurality of voltage sensing system modules, the optical signal management router including, a source dividing optical circuit having, at least a first optical wave splitter having, an input adapted to be coupled to said light source for receiving said primary pulsed light wave, and a plurality of outputs, M, for passing from each of said M outputs a portion of said primary pulsed light wave, and an optical circuit arrangement for coupling an output to said optical wave splitter of said router to each of input of said voltage sensing modules such that each module specific pulse light waves arrives at differing times relative to each other; at least a first optical wave combiner having, a plurality of inputs, J, where a corresponding jth one is coupled to a mutually exclusive output of said first combiner of said voltage sensing system modules for receiving light waves therefrom, and an output for passing therefrom any received light waves at said J inputs thereof; at least a first detector having, a detector input coupled to said output of said first optical wave combiner of said router, and a detector output for producing an electrical detector output signal representative of any light at its detector input; and an electrical signal processor responsive to said electrical detector output signal for deriving said voltage intended to be measured and associated with each of said voltage sensing system modules. 15. A time division multiplexed optical voltage measuring system comprising: at least one light source for generating a primary pulsed light wave having a selected pulse width and duty cycle; an optical sensing system circuit including, (i) a plurality of optical sensors, N, wherein each nth sensor is configured to sense a desire electromagnetic parameter, and where each sensor configured to, (a) receive an interrogation light wave, and (b) emit at least a first sensor output light wave having optical characteristics derived from said interrogation light wave and in response to a selected electromagnetic intended to be sensed, and (ii) an optical wave splitting circuit arrangement having, at least one input for receiving a pulsed light wave derived from said primary pulsed light wave, and arranged such that each of said N optical sensors receives an interrogation pulsed light wave derived from said primary pulsed light wave, and (iii) at least a first optical wave comber having at least N inputs, where an nth input is arranged to correspondingly receive said at least a first sensor output wave associated with said nth sensor, and (iv) an optical wave delay circuit arrangement such that said first optical wave combiner output emits said at least a first sensor output wave associated with each of said N sensors at differing times; at least a first detector having, a detector input coupled to said first optical wave combiner output, and a detector output for producing an electrical detector output signal representative of any light at its input; and an electrical signal processor responsive to said electrical detector output signal for deriving said electromagnetic parameter intended to be measured as a function of received sensor output light waves from said plurality of sensors. 16. The time division multiplex optical voltage measuring system of claim 2 where a first output of said first optical splitter is coupled to an input of a first one of said N optical sensors through a first light delay means, and a second output of said first optical splitter is coupled to an input of a second one of said N optical sensors through a second light delay means imposing a delay greater than said first light delay means so as to impose a fixed delay in the arrival of light pulses at the inputs of said first and second optical sensors. 17. The time division multiplex optical voltage measuring system of claim 16 where a third output of said first optical splitter is coupled to an input of a third one of said N optical sensors through a third light delay means greater than said second light delay means so as to impose a fixed delay in the arrival of light pulses at the input of said third optical sensor relative to said second optical sensor. 18. The time division multiplexed optical voltage measuring system of claim 2 where: a first output of said first optical splitter is coupled to an input of a first one of said N optical sensors through a first light delay means; a second output of said first optical splitter is coupled to an input of a second optical splitter through a second light delay means so as to impose a second fixed delay; and a first output of said second optical splitter is coupled to an input of a second one of said N optical sensors through a third light delay means, and a second output of said second optical splitter is coupled to an input of a third one of said N optical sensors through a fourth light delay means greater than said third light delay means so as to impose a fixed delay in the arrival of light pulses at the inputs of said second and third optical sensors relative to a light pulse at said first optical sensor.
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