| CPC G01H 5/00 (2013.01) [F01D 25/00 (2013.01); F02C 1/00 (2013.01); F02C 6/00 (2013.01); F02C 7/00 (2013.01); F02C 9/00 (2013.01); G01H 1/08 (2013.01); G01M 99/00 (2013.01)] | 6 Claims |
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1. A sign detection device, comprising:
a plurality of sensors disposed at a plurality of positions along a circumferential direction of a cross-section at a position where a vibration can be detected in a detection target object and configured to measure physical quantities at each position, wherein
each of the plurality of sensors comprises at least one of a pressure sensor, a strain sensor, an acceleration sensor, a velocity sensor, and a displacement sensor, and
the detection target object comprises at least one of a gas turbine, a steam turbine, an engine, a boiler, an aircraft, or a compressor;
a data acquisition unit for acquiring time-series fluctuation data of the physical quantities from the plurality of sensors;
a calculation unit for calculating, from the time-series fluctuation data, a parameter indicating a correlation between the physical quantities at any two positions among the plurality of positions; and
a detection unit for detecting a sign of change in vibration of the detection object based on the parameter,
wherein the parameter is a correlation coefficient indicating a correlation between fluctuations of the physical quantities at each position,
wherein the calculation unit calculates the correlation coefficient for all combinations of two positions selected from the plurality of positions, and calculates link strength from a sum of an absolute value of the calculated correlation coefficients, and
wherein the detection unit detects the sign of change in vibration based on the link strength.
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