CROSS-REFERENCE TO RELATED APPLICATION

This application is a 371 application of the International PCT application serial no. PCT/JP2019/041179, filed on Oct. 18, 2019, which claims the priority benefits of Japan Patent Application No. 2018-214055,filed on Nov. 14, 2018. The entirety of each of the above-mentioned patent applications is hereby incorporated by reference herein and made a part of this specification.

TECHNICAL FIELD

The invention relates to an information processing device that analyzes noise included in a signal.

BACKGROUND ART

A device for sequence control of a load device or the like is known as a related art. For example, Patent Literature 1 discloses a technique in which a programmable controller does not malfunction even when noise exceeding a specification range that cannot be absorbed by hardware is superimposed.

Specifically, the programmable controller disclosed in Patent Literature 1 forms a loopback system for noise detection signals. In the loopback system, a noise detection signal conducted by a noise detection means is converted into a digital signal. Based on the digital signal, it is determined whether or not a state such as a first state such as an on state of the noise detection signal or a second state such as an off state thereof can be recognized. When it has been determined that the predetermined state cannot be recognized, it is determined that noise at a level exceeding a permissible range is superimposed on the noise detection signal. The output of a sequence control signal to a noise source portion corresponding to the noise detection means is stopped or the noise source portion is disconnected from the sequence control system.

More specifically, Patent Literature 1 discloses a configuration in which each of a plurality of switches switches connection and disconnection of a corresponding signal line. In the configuration disclosed in Patent Literature 1, if noise is detected when a specific switch is on and not detected when the switch is off, a signal line corresponding to the specific switch is specified as a generation source of noise.

CITATION LIST

Patent Literature

Patent Literature 1

Patent Literature 1: Japanese Patent Laid-Open No. 2004-185570 (published on Jul. 2, 2004)

SUMMARY OF INVENTION

Technical Problem

However, in the related art described above, to specify a generation source of noise included in a received signal from a cable, it is essential to perform a test for detecting noise by switching connection and disconnection of candidate generation sources of noise in the loopback system. That is, in the related art described above, it is not possible to derive the correlations between noise and the normal operations of the candidate generation sources of the noise.

It is an object of an aspect of the invention to realize an information processing device capable of obtaining a relationship between noise and an apparatus to be controlled from control data of the apparatus to be controlled in normal operation.

Solution to Problem

In order to solve the above problems, an information processing device according to an aspect of the invention includes an acquisition unit configured to acquire time-series data of a signal quality indicating a level of noise included in a signal input through a cable in a network and time-series data of control data for controlling an operation of an apparatus to be controlled in the network and a correlation derivation unit configured to derive a correlation value between a variation in the time-series data of the signal quality and a variation in the time-series data of the control data.

A control method for an information processing device according to an aspect of the invention includes an acquisition step of acquiring time-series data of a signal quality indicating a level of noise included in a signal input through a cable in a network and time-series data of control data for controlling an operation of an apparatus to be controlled in the network, and a correlation derivation step of deriving a correlation value between a variation in the time-series data of the signal quality and a variation in the time-series data of the control data.

Advantageous Effects of Invention

According to an aspect of the invention, a relationship between noise and an apparatus to be controlled can be obtained from control data of the apparatus to be controlled in normal operation.

