Roller Shutter Motorized Adjustment Method for Locking Position
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Solution Overview
Problem
Existing motorized windable element installations face challenges in ensuring the recorded rotation reversal position is sufficiently distant from the stop and exit positions of the locking means, leading to potential damage from premature abutment or partial disengagement due to torque detection delays and variable dimensions.
Innovation Solution
A method that iteratively adjusts the candidate rotation reversal positions by driving the windable element in both winding and unwinding directions, with each position offset from the previous, until the free end exceeds the exit position, allowing for the selection of an optimal position distant from both stop and exit positions, using position and torque sensors for detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the locking means are made small to reduce device complexity, then the distances between positions are reduced, but this prevents guaranteeing sufficient distance from stop and exit positions
Solution Approach 1:
The system performs preliminary movements before the main locking operation. Specifically, before attempting to lock, the shutter is moved a predetermined distance to ensure it reaches a safe position far enough from the stop and exit positions of the locking means, compensating for the small size of the locking mechanism
Solution Approach 2:
The patent introduces a buffer distance or safety margin in the movement sequence. The shutter is positioned at a predetermined distance before the actual locking point, creating a cushion that prevents premature engagement or disengagement even when the locking means are small
2Reliability
If torque detection threshold is set high to avoid false detection during start-up, then detection reliability improves, but response time increases due to start-up delay
Solution Approach 1:
The system performs preliminary positioning movements before attempting locking operations. By moving the shutter to a predetermined position first, the system ensures proper engagement geometry is established before torque detection becomes critical, allowing for more accurate threshold settings
Solution Approach 2:
The movement sequence is divided into distinct phases: a first movement to a predetermined position, followed by a second movement for actual locking. This segmentation allows torque detection to be optimized for each phase separately, improving overall detection accuracy
3Ease of operation
If the recorded rotation reversal position is too close to the locking mechanism extension position, then ease of operation improves, but the bottom slat may disengage from the locking mechanism over time
Solution Approach 1:
Before performing the locking operation, the system executes a preliminary movement to a predetermined position that is offset from the previously recorded rotation reversal position. This ensures the shutter is properly positioned relative to the locking means before engagement, preventing premature disengagement over time
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
This approach ensures the optimal rotation reversal position is chosen, preventing damage and ensuring reliable operation by maintaining the windable element within the locking means, even as joints relax or dimensions vary, thereby enhancing the security and longevity of the shutter.
Implementation Method 1
torque sensors involved, and their activation requires a start-up time. This is due in particular to the fact that the torque peak at motor start-up is often higher than predefined thresholds characteristic of an obstacle or the shutter reaching its end stop
Data Source
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Figure 6
AI summary
The invention relates to a method for adjusting a motorized roller shutter installation in which, after recording a first candidate rotation reversal position (PM1), the curtain is driven in the winding direction to the locked position (P2), then the following sequence is carried out: a) the curtain is driven in the unwinding direction to a candidate rotation reversal position (PM2, PM3) located beyond the first candidate rotation reversal position (PM1), b) the curtain is driven in the winding direction to the locked position (P2), steps a) and b) being repeated until the free end (4) of the curtain reaches a position called the exit position (P4), beyond which the locking of the winding element (2) is no longer activated when the winding element is driven in the winding direction.