Hob Heating Zone Adaptation for Cookware Movement Detection
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Solution Overview
Problem
Matrix hobs with multiple heating elements struggle to reliably detect and adapt to the position and size of cookware, leading to sub-optimal heating zone adjustments and user inconvenience, especially when cookware is moved unintentionally or intentionally.
Innovation Solution
A method that uses a detection arrangement and control unit to differentiate between intentional and unintentional cookware movements, automatically adjusting the heating zone and operating parameters based on spatial distance, time interval, size, shape, and material properties, allowing users to confirm parameter inheritance for relocated zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the detection arrangement detects cookware position at intervals to save energy, then energy consumption is reduced, but the ability to detect intentional vs unintentional movements is compromised
Solution Approach 1:
The system performs preliminary detection when cookware is first placed on the hob to establish baseline position and characteristics. This preliminary action allows the system to later distinguish between intentional removal/placement and unintentional movement by comparing subsequent detections against this baseline, enabling reliable movement type classification while maintaining energy-saving intervals during normal operation
Solution Approach 2:
The system uses feedback from multiple detection events to classify movement types. By analyzing the sequence of detection results (initial placement, subsequent movements, time intervals, position changes), the control unit can distinguish between intentional and unintentional movements. This feedback mechanism maintains detection reliability while allowing extended intervals between detections to save energy
2Ease of operation
If the heating zone is automatically shifted when cookware is moved, then ease of operation is improved, but the complexity of the control system increases
Solution Approach 1:
The system performs self-service by automatically detecting cookware movements and shifting the heating zone without user intervention. The control unit monitors detection results, identifies when cookware has been moved to a new position, and automatically reassigns heating elements to form a new heating zone. This self-service capability improves ease of operation while the automated nature of the process actually reduces the need for complex user interfaces or manual adjustments
Solution Approach 2:
The detection arrangement and control unit serve multiple functions: they detect cookware presence, determine cookware position, classify movement types (intentional vs unintentional), and control heating zone formation. This multi-functionality consolidates what could be separate complex systems into integrated components, managing overall system complexity while enabling sophisticated automatic heating zone adjustment
3Measurement precision
If the system distinguishes between intentional and unintentional cookware movement, then measurement precision is improved, but the device complexity increases
Solution Approach 1:
The system performs preliminary detection when cookware is first placed to establish baseline characteristics including position, size, and shape. This preliminary measurement allows subsequent movements to be compared against the baseline, enabling precise classification of movement types. The preliminary action creates a reference framework that simplifies subsequent detection and classification tasks
Solution Approach 2:
The system applies partial detection strategies by not continuously monitoring all parameters at full resolution. Instead, it performs full detection initially, then uses simpler comparison-based detection for subsequent movements, checking only whether position changes exceed thresholds or whether time intervals match patterns of intentional vs unintentional movement. This partial action approach achieves sufficient measurement precision while reducing computational complexity
Data Source
Figure 1
Figure 2~3
AI summary
The method involves detecting an operation which has the removal of cooking utensil element (12) from an opening position (20) and the adjacent positioning of the cooking utensil element in an end position (22). The heating zone (16) is displaced in the area of the end position in connection with the detected operation.