Monitoring device, control system, monitoring method, and program

The monitoring device addresses the challenge of setting thresholds for response delays by using estimated position information and anomaly detection units, achieving high-precision safety monitoring and reducing errors in abnormality detection.

JP7870900B1Active Publication Date: 2026-06-05MITSUBISHI ELECTRIC CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
MITSUBISHI ELECTRIC CORP
Filing Date
2025-08-12
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing monitoring systems struggle with high-precision safety monitoring due to the difficulty in setting appropriate thresholds for response delays in servo drivers, leading to errors in detecting abnormalities.

Method used

A monitoring device that includes a position estimation unit to generate estimated position information considering response characteristics, and anomaly detection units to compare calculated and estimated positions with thresholds, enabling accurate anomaly detection.

Benefits of technology

Enables highly accurate monitoring by compensating for response delays and communication delays, reducing errors in abnormality detection, and allowing for simpler system configurations.

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Abstract

The monitoring device (3) includes a position estimation unit (14) that acquires command values ​​sent from the controller to a drive unit that drives the controlled object, and generates estimated position information indicating the position of the control point of the controlled object, including the response characteristics of the drive unit, by inputting the command values ​​into a response model that represents the response to the input in the drive unit; a first anomaly detection unit (21) that detects a first anomaly based on the estimated position information; and a processing unit that executes anomaly processing when a first anomaly is detected.
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