Motor-Driven Locking System Pinching Detection
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Solution Overview
Problem
Existing motor-operated closure systems, such as sunroofs and window winders, face issues with incorrect reversal due to mechanical problems like increased friction, leading to false detection of pinching situations, especially with hard spring rates, where existing adaptation algorithms are slow to react and inefficient in compensating for sluggishness.
Innovation Solution
A method that detects initial sluggishness during closure, records its position and amplitude, and uses a counter to track recurring issues, activating compensation only after multiple occurrences, thereby reducing memory requirements and ensuring continued closure without false pinching detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing adaptation algorithms are used to detect pinching situations with hard spring rate, then pinching detection is performed, but the system incorrectly reverses due to mechanical problems like increased friction and cannot compensate for sluggishness quickly enough
Solution Approach 1:
The patent segments the locking path into multiple individual positions and evaluates binding separately at each position rather than using a single averaged algorithm. This allows targeted compensation at specific problematic positions without affecting the entire locking process, enabling faster and more accurate response to mechanical issues.
Solution Approach 2:
The patent changes the evaluation parameters by measuring binding at each individual locking position and using a counter mechanism to track recurring issues. When binding exceeds a threshold at the same position multiple times, the system activates compensation specifically at that position, allowing rapid adaptation to mechanical problems without the delays of previous algorithms.
2Adaptability or versatility
If a large memory is used to store continuous locking area data for adaptation, then comprehensive adaptation is possible, but memory requirements and system complexity increase significantly
Solution Approach 1:
The patent divides the locking area into multiple discrete positions and only stores binding data for positions where binding occurs, rather than storing continuous data across the entire locking path. This segmentation dramatically reduces memory requirements while maintaining adaptability at problematic locations.
Solution Approach 2:
The patent extracts and stores only the essential information needed for compensation - the position of binding and the number of occurrences - rather than storing complete speed curves or continuous locking data. This extraction approach maintains adaptation capability while minimizing memory usage.
3Reliability
If the system reverses immediately upon detecting binding, then pinching protection is provided, but false reversals occur due to mechanical friction without actual pinching
Solution Approach 1:
The patent performs preliminary evaluation by counting the number of binding occurrences at each position before activating reversal or compensation. This preliminary action allows the system to distinguish between temporary mechanical friction and genuine pinching situations, reducing false reversals while maintaining safety.
Solution Approach 2:
The patent implements a feedback mechanism using a counter that tracks binding occurrences at each position. The system uses this feedback to determine whether to reverse or activate compensation, improving detection accuracy by considering the frequency and consistency of binding events rather than reacting to single occurrences.
Data Source
Figure 1~2
AI summary
The present invention relates to a method for protection against jamming in a motor-driven locking system and a device for the execution of the method.