Inertial Sensor Integration for Adaptable Door Movement Detection
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Solution Overview
Problem
Current door movement detection systems in household appliances, such as refrigerators, are limited by fixed trigger angles that cannot be adjusted without mechanical reconfiguration, leading to inaccurate activation of camera systems and reduced image evaluation capabilities.
Innovation Solution
Integration of inertial sensors, such as rotational speed sensors and acceleration sensors, within the door to continuously detect door movement and adapt trigger angles, allowing for precise control of appliance functions based on varying door opening angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Hall sensors and magnets are used with fixed positions to detect door movement, then the trigger angle can be detected, but the trigger angle cannot be adjusted without manual re-adjustment of component positions
Solution Approach 1:
The patent replaces fixed-position Hall sensors with an inertial sensor that dynamically measures door opening angle through acceleration detection. This allows the trigger angle to be adaptively adjusted via software thresholds without any physical repositioning of components, resolving the contradiction between adaptability and device complexity
Solution Approach 2:
The patent substitutes the mechanical positioning system (Hall sensors and magnets with fixed physical positions) with an inertial measurement system that uses acceleration sensors to calculate door angle. This replacement eliminates the need for mechanical re-adjustment while maintaining angle detection capability, thereby improving adaptability without increasing complexity
2Manufacturing precision
If the trigger angle is fixed by the installed position of sensor components, then the detection system is simple, but deviations from the set trigger angle reduce image evaluation capability
Solution Approach 1:
The patent replaces mechanical angle detection (which depends on precise physical component positioning) with an inertial sensor system that measures acceleration and calculates door angle through integration. This substitution achieves high manufacturing precision through software-based angle calculation while simultaneously providing full adaptability through programmable trigger thresholds
Solution Approach 2:
The patent changes the detection parameter from fixed physical component positions to dynamic acceleration measurements. By integrating acceleration data over time, the system calculates door opening angle with high precision and allows flexible adjustment of trigger angles through software parameters, thereby achieving both precision and adaptability
3Ease of operation
If manual re-adjustment of Hall sensor and magnet positions is required to change trigger angle, then device structure remains simple, but the option is unavailable when door position has been altered by use
Solution Approach 1:
The patent replaces the mechanical adjustment system (manually repositioning Hall sensors and magnets) with an electronic inertial sensor system. This substitution makes trigger angle re-adjustment extremely easy through software configuration while the device structure remains relatively simple, using only basic acceleration sensing and integration algorithms
Solution Approach 2:
The inertial sensor system automatically tracks door position and calculates trigger angles without requiring user intervention for physical adjustment. The system self-adapts to door position changes by continuously monitoring acceleration, eliminating the need for manual re-adjustment while maintaining simple device architecture
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables continuous and accurate detection of door movement, allowing for adaptable trigger angles without mechanical alterations, improving camera activation timing and image quality, and accommodating different camera modules and mounting tolerances.
Implementation Method 1
the at least one sensor has at least one inertial sensor integrated into the at least one door
Data Source
AI summary
A household appliance includes at least one movable door and at least one sensor for detecting a door movement, particularly a door opening angle of the at least one door. The at least one sensor includes at least one inertial sensor integrated into the at least one door. The household appliance is particularly advantageously a refrigerating device, especially a refrigerator, having a pivoting door.