METHOD AND SYSTEM FOR MONITORING ROTOR BLADE IN TURBINE ENGINE

• Main Authors: MICHAEL ALLEN WOHL, ANDREW DAVID ELLIS, SCHLEIF KURT KRAMER, MARIO JOSEPH ARSENAULT, VINCENT CARMONA
• Format: Patent
• Language: English; Japanese
• Published: 25.06.2020
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; COMBUSTION ENGINES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; ENGINE PLANTS IN GENERAL; GAS-TURBINE PLANTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES; MEASURING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; PHYSICS; STEAM ENGINES; TESTING; WEAPONS

To provide an improved method and system relating to monitor and diagnosis of rotor blades.SOLUTION: A method includes: attaching an RF reader 166 to a stationary surface 182; attaching an RF tag 160 to a rotor blade 181; collecting strength-of-signal data points via an RF monitoring process; repeating the RF monitoring process until a plurality of strength-of-signal data points are collected; determining a maximum strength-of-signal from the plurality of strength-of-signal data points; and determining an arrival-time for the rotor blade as being a time that corresponds to the maximum strength-of-signal. The RF monitoring process includes: emitting an RF signal 190 from the RF reader 166; receiving the RF signal at the RF tag; emitting a return RF signal 191 by the RF tag in response to the receiving; receiving the return RF signal at the RF reader; measuring a signal strength of the return RF signal; and determining the strength-of-signal data point as being equal to the measured signal strength.SELECTED DRAWING: Figure 5 【課題】ロータブレードの監視と診断に関連する改善された方法およびシステムを提供する。【解決手段】方法は、ＲＦリーダ１６６を静止面１８２に取り付け、ＲＦタグ１６０をロータブレード１８１に取り付け、ＲＦ監視プロセスを介して信号強度データポイントを収集し、複数の信号強度データポイントが収集されるまでＲＦ監視プロセスを繰り返し、複数の信号強度データポイントから最大信号強度を決定し、ロータブレードの到着時間を最大信号強度に対応する時間として決定する。ＲＦ監視プロセスは、ＲＦリーダ１６６からＲＦ信号１９０を発信し、ＲＦタグでＲＦ信号を受信し、それに応答してＲＦタグによりリターンＲＦ信号１９１を発信し、ＲＦリーダでリターンＲＦ信号を受信し、リターンＲＦ信号の信号強度を測定し、信号強度データポイントが測定された信号強度と等しいと判断する。【選択図】図５