Apparatus, method, and program

Abstract

An apparatus is provided comprising: an acquisition unit that acquires multiple process data related to a process; a calculation unit that calculates the similarity between the time-dependent changes in the frequency components of each process data; and a determination unit that determines the state of the process based on the similarity. The calculation unit calculates the cross-correlation between the time-dependent changes in the frequency components as the similarity; the calculation unit calculates the cross-correlation using a predetermined lag value; and the calculation unit further calculates a coefficient matrix obtained by non-negative matrix factorization of each process data in the frequency domain as the time-dependent change in the frequency components.

Claims

1. An acquisition unit that acquires multiple process data related to the process, A calculation unit that calculates the similarity between the time-dependent changes in the frequency components of each process data, A determination unit that determines the state of the process based on the similarity, A device equipped with the following features.

2. The apparatus according to claim 1, wherein the calculation unit calculates the cross-correlation between the temporal changes of the frequency components as the similarity.

3. The apparatus according to claim 2, wherein the calculation unit calculates the cross-correlation using predetermined lag values.

4. The apparatus according to claim 1, wherein the calculation unit further calculates the coefficient matrix obtained by non-negative matrix factorization of each process data in the frequency domain as the change over time of the frequency component.

5. The acquisition unit acquires each process data in the time domain, The apparatus according to claim 4, wherein the calculation unit converts each process data in the time domain into process data in the frequency domain.

6. The apparatus according to claim 1, wherein the determination unit determines the state of the process based on the degree of similarity between the time-dependent changes in the frequency components of each process data within a predetermined time range, at each reference time.

7. The apparatus according to claim 1, wherein the determination unit determines that an abnormality or a sign of an abnormality has occurred in the process, depending on whether the similarity is less than a standard value.

8. The process involves circulating the fluid stored in the tank using a circulation pipe and circulation pump provided in the tank, while discharging it from a discharge pipe connected to the circulation pipe in proportion to the amount stored in the tank. The acquisition unit acquires process data of the storage amount and process data of the pressure of the circulation pump. The apparatus according to claim 1, wherein the determination unit determines the state of blockage in the circulation pipe as the state of the process.

9. The acquisition phase involves obtaining multiple process data related to the process, A calculation step to calculate the similarity between the time-dependent changes in the frequency components of each process data, A determination step in which the state of the process is determined based on the similarity, A method for providing this.

10. By being executed by a computer, the computer will An acquisition unit that acquires multiple process data related to the process, A calculation unit that calculates the similarity between the time-dependent changes in the frequency components of each process data, A determination unit that determines the state of the process based on the similarity. A program that makes it function as such.

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