Wing Closing Device Reference Frame Adjustment
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Solution Overview
Problem
Devices for closing and opening openings, such as roller shutters and sliding windows, face issues with slippage due to mechanical or electronic errors, leading to potential damage from motor forcing against physical stops, as existing solutions for adjusting limit switches are either costly or prone to errors, and automated relearning processes do not fully prevent damage.
Innovation Solution
A method and device that utilize an electronic control system to measure displacement and store reference values for extreme positions, allowing for automatic adjustment of the measurement reference frame if motor force is detected, ensuring accurate positioning and minimizing damage by shifting the reference frame when a stop on force occurs within a predetermined threshold, thus preventing motor force and maintaining proper operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic control system uses a fixed reference frame for limit switch memorization, then the initial positioning accuracy is maintained, but slippage over time causes the motor to force against physical stops leading to potential damage
Solution Approach 1:
The patent applies the dynamics principle by making the reference frame adaptive rather than fixed. The system dynamically adjusts the reference frame based on the detected position of the movable member during operation. When slippage is detected (motor forcing against stops), the system recalibrates the reference frame to compensate for the accumulated error, transforming a static reference system into a dynamic one that self-corrects over time.
Solution Approach 2:
The patent implements feedback by continuously monitoring the motor's operation and detecting when forcing occurs against physical stops. This feedback mechanism triggers a recalibration process that adjusts the reference frame memorized in the electronic card. The system uses the feedback from forced stops to automatically correct positioning errors without requiring manual intervention or complete relearning of limit switches.
2Measurement precision
If automated relearning of limit switches is implemented at regular intervals, then positioning accuracy is restored, but the complexity of the control system increases and complete prevention of damage is not achieved
Solution Approach 1:
The patent applies self-service by enabling the system to automatically detect and correct its own positioning errors without external intervention. When motor forcing is detected, the system autonomously initiates a reference frame adjustment process, modifying the memorized limit switch positions to account for slippage. This self-correcting mechanism eliminates the need for scheduled manual relearning or complex automated relearning protocols.
Solution Approach 2:
The patent extracts only the essential correction needed from a complete relearning process. Instead of implementing full automated relearning of all limit switches at regular intervals, the system selectively adjusts only the reference frame parameters that have drifted due to slippage. This partial correction approach reduces system complexity while maintaining positioning accuracy.
3Measurement precision
If the limit switches are adjusted manually during installation, then the initial positioning is accurate, but the adjustment process is costly and requires professional installer intervention
Solution Approach 1:
The patent enables the system to perform its own calibration and adjustment without requiring professional installer intervention. The automatic reference frame adjustment feature allows end-users to benefit from accurate positioning while the system handles the complex calibration process autonomously, eliminating the need for costly service calls for routine adjustments.
Solution Approach 2:
The patent performs preliminary calibration during the initial installation phase, establishing a reference frame that the system will maintain and self-correct throughout its operational life. This preliminary setup, combined with ongoing automatic adjustments, eliminates the need for repeated professional interventions that would otherwise be required to maintain accuracy.
Data Source
Figure 1
Figure 2A~3C
AI summary
The method involves shifting measurement referential when an electric motor (3) is stopped on effort in interval of displacement units before an electronic control unit (4) e.g. electronic card, measures displacement corresponding to displacement unit values, so that difference between the values remains constant. One of the values permits a mobile unit (2) i.e. apron, to attain a position, where the mobile unit is in stop moment of the motor from a reference position of the mobile unit.