Information processing system, information processing method, and recording medium

1. An information processing system comprising:

a state data acquisition device configured to acquire, from a plurality of sensors having different degrees of deterioration in plant, state data indicating an operation state of the plant;

a first classification device configured to generate a determination line used to classify the state data;

a mirror image data generation device configured to generate mirror image data obtained by mirroring the acquired state data using the generated determination line and to add the generated mirror image data to the acquired state data to cancel out an influence of different conditions for measurement in the acquired state data; and

a second classification device configured to generate a determination model on the basis of the state data and the generated mirror image data.

2. The information processing system according to claim 1 , further comprising:

a determination device configured to determine a deterioration or failure of one of the plurality of sensors based on the state data using and the generated determination model, and to generate a determination result diagnosing the deterioration or failure of the one of the plurality of sensors; and

a determination result output device configured to output the generated determination result.

3. The information processing system according to claim 1 , wherein the first classification device classifies the generated mirror image data to generate the determination line, and the mirror image data generation device generates mirror image data obtained by mirroring the mirror image data using the generated determination line generated by classifying the mirror image data.

4. The information processing system according to claim 1 , further comprising:

a set conversion device configured to convert the acquired state data into a set for each time,

wherein the first classification device generates the determination line used to classify the converted set of state data.

5. The information processing system according to claim 4 , wherein the set conversion device converts state data acquired in time series into a set obtained by superimposing the state data at regular intervals.

6. The information processing system according to claim 1 , further comprising:

a sampling device configured to sample the acquired state data,

wherein the first classification device generates the determination line used to classify the sampled state data.

7. An information processing system comprising:

a state data acquisition device configured to acquire from a sensor having deterioration over time in a plant, state data indicating an operation state of the plant;

a set conversion device configured to convert the acquired state data into a plurality of sets of acquired state data based on a time of acquisition; and

a classification device configured to generate a determination model on the basis of sets of acquired state data that have a same time of acquisition over a predetermined cycle among the plurality of sets of acquired state data.

8. The information processing system according to claim 7 , wherein the set conversion device is configured to convert state data acquired in time series into sets of acquired state data having the same time of acquisition by superimposing the state data at regular intervals.

9. An information processing method comprising:

acquiring, from a plurality of sensors having different degrees of deterioration in a plant, state data indicating an operation state of the plant;

generating a determination line used to classify the state data;

generating mirror image data obtained by mirroring the acquired state data using the generated determination line and adding the generated mirror image data to the acquired state data to cancel out an influence of different conditions for measurement in the acquired state data; and

generating a determination model on the basis of the state data and the generated mirror image data.

10. A non-transitory computer readable storage medium that stores a computer-program comprising computer-readable instructions, when executed by one or more computers, to perform an information processing method comprising:

acquiring, from a plurality of sensors having different degrees of deterioration in a plant, state data indicating an operation state of the plant;

generating a determination line used to classify the state data;

generating mirror image data obtained by mirroring the acquired state data using the generated determination line and adding the generated mirror image data to the acquired state data to cancel out an influence of different conditions for measurement in the acquired state data; and

generating a determination model on the basis of the state data and the generated mirror image data.