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Target clearance measurement device | Zielabstandsmessvorrichtung | Dispositif de mesure d'un dégagement de cible

Patentnummer:EP2713137B1
IPC Hauptklasse:G01B000714
Anmelder:
Erfinder:Gregg, John Francis (0)
Magdalen College, Oxford, OX1 4AU, GB
Wherritt, Peter (0)
39 Cherry Tree Close, ; Southmoor, ; Abingdon, Oxford, OX 13 5BE, GB
Anmeldung:30.09.13
Offenlegung:28.09.12
Patenterteilung:01.11.17

Abstract / Hauptanspruch
A target or rotor blade clearance measurement device is disclosed for indicating an interaction of a measurement probe with a target or rotor blade. In a preferred embodiment, the measurement device comprises a measurement probe containing a coil, a frequency source arranged to apply an input alternating signal to the measurement probe, and a frequency regulator arranged to regulate the input alternating signal at a frequency below the resonance frequency of the measurement probe. A detector is arranged to detect an output signal from the measurement probe at a frequency of the frequency source which varies in amplitude with an admittance and resonance frequency of the measurement probe. A circuit is arranged to scale the amplitude of the output signal detected by the detector according to the amplitude of the input signal provided by the frequency source.

EP2713137B1


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