Abstract: A mounting member for a sensor for a turbomachine having an axis is disclosed. The mounting member includes a body configured to mount to a portion of a circumferential interior surface of a casing of the turbomachine. An opening extends through a radially inner surface of the body, and is configured to position the sensor facing radially inward relative to the axis. A passage in the body extends longitudinally through the body to route a communications lead of the sensor circumferentially relative to the circumferential interior surface of the casing.

Abstract: A casing for a turbomachine is disclosed. The casing includes a casing body including an interior surface and an exterior surface. At least one sensor is coupled relative to the interior surface of the body, the at least one sensor at most only partially extending through the body. A communications lead is operatively coupled to the at least one sensor, and extends circumferentially along the interior surface of the body.

Abstract: A method for determining an arrival-time of a rotor blade that includes attaching an RF reader to a stationary surface and an RF tag to the rotor blade. Time-of-flight data points are collected via an RF monitoring process that includes: emitting an RF signal from the RF reader and recording a first time; receiving the RF signal at the RF tag and emitting a return RF signal by the RF tag in response thereto; receiving the return RF signal at the RF reader and recording a second time; and determining the time-of-flight data point as being the duration occurring between the first time and the second time. The RF monitoring process is repeated until multiple time-of-flight data points are collected. A minimum time-of-flight is determined from the multiple time-of-flight data points, and the arrival-time for the rotor blade is determined as being a time that corresponds to the minimum time-of-flight.

Abstract: A wireless sensor antenna system for a turbomachine including a rotating blade including a passive sensor is disclosed. The wireless sensor antenna system includes an antenna extending continuously along a circumferential interior surface of a casing of the turbomachine that surrounds the rotating blade. The antenna is configured to receive a return wireless signal from the passive sensor. A power transmission element extends along the at least portion of the circumferential interior surface of the casing to power the passive sensor by emitting an electromagnetic signal to power the passive sensor.

Abstract: A method for determining an arrival-time of a rotor blade that includes attaching an RF reader to a stationary surface and an RF tag to the rotor blade. Strength-of-signal data points are collected via an RF monitoring process that includes: emitting an RF signal from the RF reader; receiving the RF signal at the RF tag and emitting a return RF signal by the RF tag in response thereto; receiving the return RF signal at the RF reader; measuring a signal strength of the return RF signal as received by the RF reader; and determining the strength-of-signal data point as being equal to the measured signal strength. The RF monitoring process is repeated until multiple strength-of-signal data points are collected. A maximum strength-of-signal is determined from the multiple strength-of-signal data points, and the arrival-time for the rotor blade is determined as being a time that corresponds to the maximum strength-of-signal.

Abstract: A method for determining an arrival-time of a rotor blade in a turbine engine that includes the steps of: having an RF reader attached to a stationary surface in the turbine engine; having an RF tag attached to a first region of the rotor blade; having a reference RF tag attached to a rotating structure near the RF tag; in relation to a first revolution of the rotor blade occurring during the operation of the turbine engine, collecting an arrival-time for each of the RF tag and the reference RF tag with the RF reader via an RF monitoring process; comparing the arrival-time of the RF tag to the arrival-time of the reference RF tag to determine an arrival-time test result for the first region of the rotor blade for the first revolution.

Abstract: A wireless sensor antenna system for a turbomachine including a rotating blade including a passive sensor is disclosed. The wireless sensor antenna system includes an antenna extending continuously along a circumferential interior surface of a casing of the turbomachine that surrounds the rotating blade. The antenna is configured to receive a return wireless signal from the passive sensor. A power transmission element extends along the at least portion of the circumferential interior surface of the casing to power the passive sensor by emitting an electromagnetic signal to power the passive sensor.

Abstract: A casing for a turbomachine is disclosed. The casing includes a casing body including an interior surface and an exterior surface. At least one sensor is coupled relative to the interior surface of the body, the at least one sensor at most only partially extending through the body. A communications lead is operatively coupled to the at least one sensor, and extends circumferentially along the interior surface of the body.

Abstract: A mounting member for a sensor for a turbomachine having an axis is disclosed. The mounting member includes a body configured to mount to a portion of a circumferential interior surface of a casing of the turbomachine. An opening extends through a radially inner surface of the body, and is configured to position the sensor facing radially inward relative to the axis. A passage in the body extends longitudinally through the body to route a communications lead of the sensor circumferentially relative to the circumferential interior surface of the casing.

Abstract: A method for determining an arrival-time of a rotor blade that includes attaching an RF reader to a stationary surface and an RF tag to the rotor blade. Strength-of-signal data points are collected via an RF monitoring process that includes: emitting an RF signal from the RF reader; receiving the RF signal at the RF tag and emitting a return RF signal by the RF tag in response thereto; receiving the return RF signal at the RF reader; measuring a signal strength of the return RF signal as received by the RF reader; and determining the strength-of-signal data point as being equal to the measured signal strength. The RF monitoring process is repeated until multiple strength-of-signal data points are collected. A maximum strength-of-signal is determined from the multiple strength-of-signal data points, and the arrival-time for the rotor blade is determined as being a time that corresponds to the maximum strength-of-signal.

Abstract: A method for determining an arrival-time of a rotor blade that includes attaching an RF reader to a stationary surface and an RF tag to the rotor blade. Time-of-flight data points are collected via an RF monitoring process that includes: emitting an RF signal from the RF reader and recording a first time; receiving the RF signal at the RF tag and emitting a return RF signal by the RF tag in response thereto; receiving the return RF signal at the RF reader and recording a second time; and determining the time-of-flight data point as being the duration occurring between the first time and the second time. The RF monitoring process is repeated until multiple time-of-flight data points are collected. A minimum time-of-flight is determined from the multiple time-of-flight data points, and the arrival-time for the rotor blade is determined as being a time that corresponds to the minimum time-of-flight.

Abstract: A method for determining an arrival-time of a rotor blade in a turbine engine that includes the steps of: having an RF reader attached to a stationary surface in the turbine engine; having an RF tag attached to a first region of the rotor blade; having a reference RF tag attached to a rotating structure near the RF tag; in relation to a first revolution of the rotor blade occurring during the operation of the turbine engine, collecting an arrival-time for each of the RF tag and the reference RF tag with the RF reader via an RF monitoring process; comparing the arrival-time of the RF tag to the arrival-time of the reference RF tag to determine an arrival-time test result for the first region of the rotor blade for the first revolution.

Abstract: A system for attaching a device to a rotating shaft is provided herein. The system may include a rotating shaft, a telemetry transmitter positioned about the rotating shaft, and a housing positioned about the telemetry transmitter. The telemetry transmitter may be trapped by the housing. The system also may include a connector configured to connect the housing to the rotating shaft.

Abstract: A system for routing rotatable wire bundles which extend from a rotor shaft of a turbomachine includes a plurality of wire bundles which extend outwardly from an inner passage of the rotor shaft of the turbomachine. An annular wire barrel is coupled to an end of the rotor shaft. A plurality of thru-holes is defined within and/or by the wire barrel. The plurality of thru-holes is annularly arranged therein. Each thru-hole extends through an aft wall of the wire barrel and is circumferentially spaced from adjacent thru-holes. Each wire bundle extends individually through a corresponding thru-hole of the plurality of thru-holes.

Abstract: An apparatus for determining axial spacing between conductive rings of a slip ring assembly includes a signal generator that generates an incident signal, a plurality of conductive rings axially spaced along a shaft where the plurality of conductive rings includes a first conductive ring and a second conductive ring that are axially spaced at a first axial distance. The shaft and the plurality of conductive rings are submerged in a bath of a liquid or encased in an epoxy. A first twisted wire pair is electronically coupled at to the signal generator and to inputs of the first and second conductive rings. A second twisted wire pair is electronically coupled at one end to outputs of the first and second conductive rings. A method for determining axial spacing between conductive rings of a slip ring assembly is also disclosed.

Abstract: A method for routing wires from a rotor shaft of a turbomachine includes routing a plurality of wire bundles through an end portion of the rotor shaft and into an annular extension shaft which is coupled to the end portion of the rotor shaft, threading each wire bundle through a corresponding thru-hole of a plurality of thru-holes defined in an annular wire barrel, inserting the wire barrel into the extension shaft and fixedly connecting the wire barrel to the extension shaft.

Abstract: A system for transmitting data from a rotating component of a turbomachine includes a plurality of thermal sensors coupled to corresponding rotatable components within the turbomachine where each thermal sensor generates a discrete analog signal indicative of temperature. A plurality of transmitter assemblies is coupled to an end of a rotor shaft of the turbomachine. The plurality of transmitter assemblies comprises a first transmitter assembly and a second transmitter assembly. The first transmitter assembly is configured to receive the discrete analog signals from the plurality of thermal sensors, multiplex the plurality of discrete analog signals into a single amplifier and an analog-to-digital converter to generate a single stream of digital data therefrom. The system also includes a slip ring assembly having a plurality of conductive rings where at least one of the conductive rings defines a digital signal path between the first transmitter assembly and a data acquisition system.

Abstract: An apparatus for determining axial spacing between conductive rings of a slip ring assembly includes a signal generator that generates an incident signal, a plurality of conductive rings axially spaced along a shaft where the plurality of conductive rings includes a first conductive ring and a second conductive ring that are axially spaced at a first axial distance. The shaft and the plurality of conductive rings are submerged in a bath of a liquid or encased in an epoxy. A first twisted wire pair is electronically coupled at to the signal generator and to inputs of the first and second conductive rings. A second twisted wire pair is electronically coupled at one end to outputs of the first and second conductive rings. A method for determining axial spacing between conductive rings of a slip ring assembly is also disclosed.

Abstract: A system for transmitting data from a rotating component of a turbomachine includes a plurality of thermal sensors coupled to corresponding rotatable components within the turbomachine where each thermal sensor generates a discrete analogue signal indicative of temperature. A plurality of transmitter assemblies is coupled to an end of a rotor shaft of the turbomachine. The plurality of transmitter assemblies comprises a first transmitter assembly and a second transmitter assembly. The first transmitter assembly is configured to receive the discrete analogue signals from the plurality of thermal sensors, multiplex the plurality of discrete analogue signals into a single amplifier and an analogue-to-digital converter to generate a single stream of digital data therefrom. The system also includes a slip ring assembly having a plurality of conductive rings where at least one of the conductive rings defines a digital signal path between the first transmitter assembly and a data acquisition system.

Abstract: A sensor simulator and a system for testing rotatable sensor signal transmitters using the sensor simulator is disclosed herein. The sensor simulator includes a first and a second pin. The first pin includes a first end portion and a second end portion where the first end portion is configured to electronically couple to a positive terminal of a sensor circuit of the sensor signal transmitter. The second pin includes a first end portion and a second end portion where the first end portion is configured to electronically couple to a negative terminal of the same sensor circuit. The sensor simulator further includes an electronic component having a first wire lead electronically coupled to the second end portion of the first pin and a second wire lead electronically coupled the second end portion of the second pin.