Binary Signal Display Using Probability Graphs for Abnormality Detection
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Solution Overview
Problem
Existing techniques fail to effectively display and determine whether a binary signal is abnormal or normal, as they do not provide a clear method for analyzing the average behavior and outlier degree of binary signals.
Innovation Solution
A signal display control device that accepts observation signals, calculates the probability of a normal signal at each time point, and displays both the signal graph and probability graph on a common time axis, allowing for easy determination of signal abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a binary signal is displayed using conventional analog signal display methods, then the display structure remains simple, but it becomes difficult to determine whether the signal is abnormal or normal
Solution Approach 1:
The patent segments the display into two distinct graphical components: a signal graph showing the binary signal values over time, and a probability graph showing the calculated probability that the signal represents a normal state. This segmentation allows each graph to serve a specific function, making abnormality determination more reliable without creating a single complex display system
Solution Approach 2:
The patent introduces probability values as an intermediary element between the binary signal and the abnormality determination. By calculating and displaying the probability that a binary signal represents a normal state, the system provides an intermediate metric that facilitates more reliable abnormality detection without requiring complex analysis of the binary signal itself
2Ease of operation
If probability calculation and dual graph display are implemented for binary signals, then signal abnormality determination becomes easy, but the device complexity increases
Solution Approach 1:
The system performs self-service by automatically calculating the probability values and generating both the signal graph and probability graph without requiring manual intervention. The processing unit automatically computes the probability that each binary signal value represents a normal state based on historical data, making the system easy to operate while the complexity is confined to the automated processing backend
Solution Approach 2:
The patent adds a new dimension to the display by introducing the probability graph as a separate visual dimension alongside the time-series signal graph. This dimensional addition provides operators with probabilistic information without cluttering the original signal display, maintaining ease of operation while systematically handling the increased processing requirements
Data Source
AI summary
An acceptance unit (111) accepts an observation signal representing an observation value at each time point. A probability calculation unit (112) calculates a probability that a normal observation signal represents a reference value at each time point. A graph display control unit (113) displays a signal graph expressing the accepted observation signal in time series, and a probability graph expressing a calculated probability in time series, on a common time axis.