Time-Series Signal Alignment for Accurate Comparison Control

The patent applies preliminary action by detecting characteristic portions in the target signal and comparison condition before performing the comparison process. The system identifies characteristic times and characteristic values in advance, then uses these pre-detected features to guide the comparison. This preliminary detection of key features allows the system to compensate for time axis deviations by focusing on corresponding characteristic points rather than comparing entire time series signals directly, thereby resolving the contradiction between being able to perform comparison and maintaining determination accuracy.

The patent introduces an intermediary approach by using characteristic portions as reference points between the target signal and comparison condition. Instead of directly comparing the entire time series signals which would require complex time alignment procedures, the system uses detected characteristic values and characteristic times as intermediaries to establish correspondence. This intermediary method simplifies the comparison process while maintaining accuracy, as it focuses comparison on key characteristic points rather than requiring full time series alignment.