Mitsubishi Heavy Industries Limited

Japan Aerospace Exploration Agency

Hiroshi Gotoda

Hiroaki Kobayashi

Keisuke Matsuyama

Toshio Nishizawa

Tomohito Nakamori

Junichi Kazawa

Yuto Hayashi

Takayoshi Hachijo

Takuya Kurosaka

Shinga Masuda

A sign detection device includes: a plurality of sensors disposed at a plurality of positions on a detection target object and configured to measure physical quantities at each position; 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 arbitrary two positions among the plurality of positions; and a detection unit for detecting a sign of sudden change in vibration of the detection object based on the parameter.

Vibration detection through correlation of nodal measurements of a physical quantity

[Object] To observe the sign or occurrence of an unstable operation of a turbo-machine. [Solving Means] An observation apparatusincludes: a detection unitincluding one or two or more sensorsthat are disposed in a turbo-machine, are highly time responsive, and observe unsteady fluctuations of the turbo-machine; a computation unitthat output signals from the one or two or more sensorsevery moment, stores time series data for a predetermined period, and calculates in real time a parameter for detecting an unstable operation of the turbo-machine; and a determination unitthat compares the parameter for detecting the unstable operation with a predetermined threshold and outputs in real time a determination result of a sign or occurrence of the unstable operation.

Observation apparatus, observation method, and non-transitory computer readable medium storing a program

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Tokyo, Japan

Hiroshi Gotoda