Dynamic Signal Reference Update for Disturbance Detection
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Solution Overview
Problem
Existing systems fail to accurately distinguish between real changes in signals from electric devices and disturbances, often misidentifying multiple disturbances as a single change in state or value, especially in devices with small signal changes.
Innovation Solution
A system that continuously updates a reference value and subdivides the spectrum of possible difference values into ranges corresponding to different causations, allowing for the identification of whether a signal change is due to a disturbance or a relevant change, using a detection circuit and processing unit to compare the signal with the reference value and associate it with the appropriate range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system uses a fixed reference value for signal comparison, then the system structure is simple, but the system cannot distinguish between real signal changes and disturbances
Solution Approach 1:
The reference value is transformed from a static fixed value to a dynamic continuously updated value. The system automatically adjusts the reference value based on incoming signals, enabling it to adapt to real signal changes while filtering out disturbances. This dynamic approach resolves the contradiction by making the reference value flexible rather than fixed.
Solution Approach 2:
The system implements a feedback mechanism where the detected signal is used to update the reference value. The comparison unit continuously compares new signals with the reference value, and the update unit adjusts the reference value based on this comparison. This closed-loop feedback system enables automatic adaptation without requiring complex manual configuration.
2Reliability
If the system continuously updates the reference value, then the system can distinguish real changes from disturbances, but the processing time and computational load increase
Solution Approach 1:
The system applies partial updating of the reference value rather than complete recalculation. The update unit adjusts the reference value incrementally based on the difference between current and previous reference values, performing only the necessary computational steps rather than exhaustive processing. This reduces computational load while maintaining disturbance recognition accuracy.
Solution Approach 2:
The signal processing is divided into discrete steps: signal reception, comparison with reference value, difference calculation, and conditional updating. This segmentation allows the system to process signals in manageable stages, reducing overall processing time while maintaining accuracy in distinguishing real changes from disturbances.
3Loss of information
If the spectrum of difference values is subdivided into multiple ranges, then the system can identify the type of disturbance, but the system complexity increases
Solution Approach 1:
The spectrum of difference values is divided into distinct ranges, each corresponding to a specific disturbance type. This segmentation allows the system to categorize disturbances (such as temperature fluctuations, noise, hysteresis effects) into separate bands, enabling identification of disturbance types while maintaining a structured and manageable classification system.
Solution Approach 2:
The system uses parameter changes in the difference value spectrum to identify disturbance types. By monitoring which range the difference value falls into, the system can determine the nature of the disturbance without requiring complex analysis. Each range represents a specific parameter threshold that, when exceeded, indicates a particular type of disturbance.
Data Source
AI summary
The present invention relates to a system for processing a signal from an electric device, e.g. a touch sensitive key. The system comprises a reference value for the signal, wherein said reference value is continuously updated, and an arithmetic unit for determining a difference value between the signal and the reference value, so that difference value corresponds with a change of the signal. The system comprises further a spectrum of the possible difference values, wherein said spectrum is subdivided into ranges corresponding with possible causations for the change of the signal in said system. Additionally, the system comprises a comparing unit for associating the difference value with the corresponding range of the spectrum and for identifying, if the difference value results from a disturbance or from a relevant change in the electric device. Further, the present invention relates to a corresponding method.