DEVICE TO MEASURE MULTI-COORDINATE SHIFTS OF BLADE ENDS Russian patent published in 2014 - IPC G01B7/00 

FIELD: measurement equipment.

SUBSTANCE: device to measure multi-coordinate shifts of blade ends, comprising a source of DC voltage, a key, working and compensatory single-turn vortex-current sensors, two resistors and the first amplifier. At the same time the outlet of the DC voltage source is connected to the inlet of the key, the outlet of the key is connected to the first outlets of the working and compensatory sensors. The second outlet of the working sensor is connected to the first outlet of the first resistor. The second outlet of the compensatory sensor is connected to the first outlet of the second resistor. Also the second and third amplifiers are introduced. The inverting inlet of the second amplifier is connected to the first outlet of the first resistor, the outlet of which is connected to the second output of the first resistor, forming the first current-voltage converter. The inverting inlet of the third amplifier is connected to the first outlet of the second resistor, the outlet of which is connected to the second output of the second resistor, forming the second current-voltage converter. Outputs of the first and second current-voltage converters are connected accordingly with the inverting and non-inverting inlets of the first amplifier, used in the mode of the voltage difference amplifier.

EFFECT: improved efficiency and sensitivity of a device.

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