Operation State Recording System with Time-Series Extraction
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Solution Overview
Problem
Existing systems fail to accurately record and troubleshoot the operation state of devices during abnormal events due to lack of time-series recording capabilities, making it difficult to determine the cause of inappropriate device responses.
Innovation Solution
An operation state recording system that includes an input unit, control devices, a nonvolatile storage device, and a time measuring unit to record the operation state from start to stop, associating changes with time, allowing for time-series recording and troubleshooting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If only operation state at abnormal event time is recorded, then storage capacity is reduced, but troubleshooting capability is insufficient
Solution Approach 1:
The patent extracts and records only the operation states that have changed from the complete operation history, storing these extracted change points in the nonvolatile storage device. This allows troubleshooting to be performed on abnormal events while minimizing storage requirements by excluding unchanged states.
Solution Approach 2:
The system preliminarily records operation state changes in volatile memory during operation, maintaining a ready buffer of change information that can be quickly transferred to nonvolatile storage when an abnormal event occurs, ensuring troubleshooting data is prepared in advance without continuous heavy storage usage.
2Loss of information
If complete operation history is recorded, then troubleshooting capability is improved, but storage capacity increases
Solution Approach 1:
The patent extracts and records only the operation states that have changed from the complete operation history, storing these extracted change points in the nonvolatile storage device. This allows troubleshooting to be performed on abnormal events while minimizing storage requirements by excluding unchanged states.
3Measurement precision
If operation state is recorded continuously, then time-series recording is achieved, but detection process complexity increases
Solution Approach 1:
Instead of continuous recording, the system performs periodic detection of operation state changes at discrete intervals, recording only when a change is detected. This maintains time-series accuracy for troubleshooting while reducing the complexity of continuous monitoring and data management.
Solution Approach 2:
The system extracts only the moments when operation state changes occur, recording these discrete change points with their timestamps. This approach achieves time-series recording capability while avoiding the complexity of managing and processing continuous streams of unchanged data.
Data Source
AI summary
An operation state recording system is provided in a target device including: an input unit; a device group; and a control system controlling the device group based on an input of the input unit. The operation state recording system records an operation state from a start to a stop of an operation of the target device, and the control system includes: a plurality of control devices controlling a plurality of devices; nonvolatile storage units where the operation state of the target device is recorded as operation history information; and a time measuring unit measuring a time.