Wireless telemetry electronic circuitry for measuring strain in high-temperature environments

US8223036B2 · kind B2 · utility

Assignees

• SIEMENS ENERGY, INC. · US
• Arkansas Power Electronics International, Inc. · US

Inventors

• David J. Mitchell · Oviedo, US
• Anand A. Kulkarni · Oviedo, US
• Ramesh Subramanian · Oviedo, US
• Edward R. Roesch · Orlando, US
• Rod Waits · Sunnyvale, US
• Roberto M. Schupbach · Fayetteville, US
• John R. Fraley · Fayetteville, US
• Alexander Lostetter · Fayetteville, US
• Brice McPherson · Fayetteville, US
• Bryon Western · West Fork, US

Key dates

• Filing date: Aug 15, 2008
• Grant date: Jul 17, 2012
• Expiry date: May 5, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03F2200/447
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a telemetry system for use in an engine, a circuit structure (34) affixed to a moving part (20) of the engine is disposed for amplifying information sensed about a condition of the part and transmitting the sensed information to a receiver external to the engine. The circuit structure is adapted for the high temperature environment of the engine and includes a differential amplifier (102, 111) having an input for receiving a signal from a sensor (101, 110) disposed on the part. A voltage controlled oscillator (104, 115) with an input coupled to the output of the amplifier produces an oscillatory signal having a frequency representative of the sensed condition. A buffer (105, 116) with an input coupled to the output of the oscillator buffers the oscillatory signal, which is then coupled to an antenna (26) for transmitting the information to the receiver.