Turbomachinery system fiberoptic multi-parameter sensing system and method
First Claim
1. A method of sensing turbomachinery system shaft static and dynamic torques, vibration modes and associated operation status, the method comprising:
- transmitting light from a single light source to a plurality of shaft surface locations on a turbomachinery system via a plurality of optical fiber bundles, the plurality of shaft surface locations arranged in a substantially axial direction between the ends of at least one shaft, such that a plurality of dynamic reflected light signals are received from the plurality of shaft surface locations by at least one high-temperature fiber bundle-based lensless reflectance sensing probe while at least one shaft is rotating, wherein at least one of the plurality of shaft surface locations has an altered texture defined by a v-groove inscribed into the surface of the shaft by altering the surface depth of desired shaft surface areas relative to other shaft surface areas and at least one other of the plurality of shaft surface locations does not include an altered texture, wherein the depth of the v-groove provides a front working point signal and a rear working point signal such that a corresponding time delay can be detected from any two v-groove locations to determine the shaft twist angle value by differentiating their reflectance pattern signatures during each rotating cycle; and
determining at least one turbomachinery system shaft torque characteristic based on at least one characteristic of the dynamic reflected light signals received from the at least one of the shaft surface locations; and
determining at least one turbomachinery system shaft vibration characteristic based on at least one characteristic of the dynamic reflected light signals received from the at least one other of the surface locations.
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Accused Products
Abstract
A fiberoptic multi-parameter sensing system for monitoring turbomachinery system shaft static and dynamic torques, vibration modes and associated operation status includes a multi-furcated fiber bundle based optical splitter configured to transmit light to a surface of at least one turbomachinery system shaft through a plurality of optical fiber bundles disposed at a plurality of locations in proximity to the surface of the at least one shaft, in which the plurality of locations together are arranged in a substantially axial direction between the ends of the at least one shaft. The system further includes an array of high-temperature bifurcated fiber bundle based reflectance probes to receive reflectance signals from the shaft surface and send to an array of photosensitive detectors, configured to detect dynamic light reflected from the at least one turbomachinery system shaft surface in response to the transmitted light during rotation of at least one turbomachinery system shaft and generate dynamic reflected light signals there from. A sensing mechanism is configured to determine a torque or vibration on at least one turbomachinery system shaft in response to the dynamic reflected light signal signatures based on time-domain and frequency-domain signal processes.
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Citations
27 Claims
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1. A method of sensing turbomachinery system shaft static and dynamic torques, vibration modes and associated operation status, the method comprising:
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transmitting light from a single light source to a plurality of shaft surface locations on a turbomachinery system via a plurality of optical fiber bundles, the plurality of shaft surface locations arranged in a substantially axial direction between the ends of at least one shaft, such that a plurality of dynamic reflected light signals are received from the plurality of shaft surface locations by at least one high-temperature fiber bundle-based lensless reflectance sensing probe while at least one shaft is rotating, wherein at least one of the plurality of shaft surface locations has an altered texture defined by a v-groove inscribed into the surface of the shaft by altering the surface depth of desired shaft surface areas relative to other shaft surface areas and at least one other of the plurality of shaft surface locations does not include an altered texture, wherein the depth of the v-groove provides a front working point signal and a rear working point signal such that a corresponding time delay can be detected from any two v-groove locations to determine the shaft twist angle value by differentiating their reflectance pattern signatures during each rotating cycle; and determining at least one turbomachinery system shaft torque characteristic based on at least one characteristic of the dynamic reflected light signals received from the at least one of the shaft surface locations; and determining at least one turbomachinery system shaft vibration characteristic based on at least one characteristic of the dynamic reflected light signals received from the at least one other of the surface locations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for sensing turbomachinery system shaft static and dynamic torques, vibration modes and associated operation status, the sensing system comprising:
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a single light source configured to transmit light to a surface of at least one turbomachinery system shaft through a plurality of optical fiber bundles disposed at a plurality of locations in proximity to the surface of the at least one shaft, the plurality of locations together arranged in a substantially axial direction between the ends of the at least one shaft; at least one high-temperature fiber bundle-based lensless reflectance sensing probe configured to detect dynamic light reflected from the at least one turbomachinery system shaft surface in response to the transmitted light during rotation of the at least one turbomachinery system shaft and generate dynamic reflected light signals there from; and a sensing mechanism configured to determine a torque and a vibration on the at least one turbomachinery system shaft in response to the dynamic reflected light signal signatures or pattern recognition based on time-domain and frequency-domain signal processes, wherein the turbomachinery shaft comprises an encoding mechanism implemented via an altered texture defined by a v-groove inscribed into the surface of the shaft by altering the surface depth of desired shaft surface areas relative to other shaft surface areas on at least one location of the at least one shaft in proximity to a respective fiber bundle location but not all locations of the at least one shaft in proximity to respective fiber bundle locations, wherein the depth of the v-groove provides a front working point signal and a rear working point signal such that a corresponding time delay can be detected from any two v-groove locations to determine the shaft twist angle value by differentiating their reflectance pattern signatures during each rotating cycle. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification