Processing Time Monitoring via Time-Series Difference Matching
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Solution Overview
Problem
Current monitoring systems for processing time of target devices lack the ability to effectively detect abnormalities and estimate their causes by comparing time series data, particularly in machine tools, where deviations in processing time can indicate issues like tool degradation or operational inefficiencies.
Innovation Solution
A processing time monitoring device that acquires and compares time series data from target devices to reference data, using dynamic programming for time difference calculation, and includes features for data preprocessing, statistic calculation, and abnormality monitoring to inform users of deviations and their causes, enabling alignment of time differences with processing information for visualization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If time series data is acquired and compared using dynamic programming matching method, then abnormality detection capability is improved, but device complexity increases
Solution Approach 1:
The system segments the abnormality detection function into distinct modules: a data acquisition unit that collects time series data from the target device, a time difference calculation unit that computes deviations from reference data using dynamic programming, and a display unit that presents results. This segmentation allows each component to perform its specific function efficiently, improving reliability while managing complexity through modular design.
Solution Approach 2:
The time difference calculation unit acts as an intermediary between the data acquisition unit and the display unit. It processes the raw time series data through dynamic programming matching, calculating time differences without requiring the display unit to perform complex computations. This intermediary role simplifies the overall system architecture while maintaining high detection capability.
2Measurement precision
If time difference calculation is performed using DP matching method, then measurement precision of time difference is improved, but processing time increases
Solution Approach 1:
The system acquires reference time series data in advance from the target device under normal operating conditions and stores it for future comparisons. This preliminary action allows the time difference calculation unit to quickly compare current data against pre-established reference patterns using dynamic programming, achieving high measurement precision without requiring complex real-time computations for reference data generation.
3Ease of operation
If processing information is aligned with time difference data for display, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The display unit merges time difference data with processing information from the target device into a single integrated display. By combining these related data streams and aligning them temporally, the system provides operators with a unified view that improves ease of operation. The merging is achieved through the display unit's ability to present multiple data types in a coordinated manner without requiring separate display systems.
Data Source
AI summary
The processing time monitoring device is intended to monitor processing time of the target device, and includes: a data acquisition unit that acquires time series data of the target device as input time series data; a time difference calculation unit that calculates a time difference between the input time series data and reference time series data, the time difference existing in a direction of a time axis; and a display unit that displays the time difference calculated by time difference calculation unit.