Turbomachinery Clearance Monitoring Based on Passive Variable Reluctance Magnetic Sensors

We discuss a novel measurement system based on passive Variable Reluctance Magnetic Sensors (VRSs) to provide clearance measurement for turbo-machine monitoring. The advantage of the solution is in its reliability and low-complexity (in terms of sensor structure, costs and electronic front-end), against an acceptable measurement accuracy, making the proposed method suitable for the condition monitoring of huge turbo-machines requiring a large number of sensors.

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