OPERATION APPARATUS

摘要

According to an embodiment, an operation apparatus includes an operation unit which performs an operation for decomposing feature waveforms before and after a change time point at which the operating state of an instrument changes into one or more frequency components, a database unit which stores frequency features representing operating states of a predetermined instrument, a calculator which calculates a weighted distance, on polar coordinates, between an operation result and a feature stored in the database unit, the weighted distance being calculated for each operating state, and an estimation unit which estimates operating states of an instrument, based on the weighted distance.

主权项

1. An operation apparatus comprising:
a measuring unit which measures an electrical quantity of an appliance at regular intervals and outputs time-series data on measured electrical quantity; a detector which detects a change time point at which an operating state of the appliance changes, based on the time-series data; a feature waveform extraction unit which extracts a feature waveform indicating how the operating state of the appliance changes before and after the change time point, based on a detected change time point and the time-series data; an operation unit which performs an operation for decomposing the feature waveform extracted by the feature waveform extraction unit into one or more frequency components; an appliance feature database which stores frequency features representing operating states of a predetermined appliance; a harmonic weighted-distance calculator which calculates a weighted distance, on polar coordinates, between an operation result of the operation unit and a frequency feature stored in the appliance feature database, the weighted distance being calculated for each operating state; and an operating state estimation unit which estimates an operating state of an appliance undergoing an operation change, based on the weighted distance which the harmonic weighted-distance calculator calculates for each operating state.