Motorized Window Treatment Rail Control to Prevent Obstruction and Tangling
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Solution Overview
Problem
Conventional motorized window treatments face issues such as damage from obstruction during operation, inaccurate setting of upper and lower limits, and tangling of cords due to improper handling of multiple operable rails, leading to malfunctions and increased maintenance.
Innovation Solution
The implementation of a motorized window treatment system with a headrail, operable rails, a driving device, a distance detection circuit, and a motor control circuit that adjusts the movement of the rails based on detected distances and command signals to prevent obstruction and tangling, allowing for automatic stopping and smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the motor continues operating until receiving a stop command during covering material expansion, then the covering material can reach the target position, but the covering material may bump into blocking objects and cause damage or uneven expansion
Solution Approach 1:
The patent applies preliminary action by detecting the position of the covering material before the motor completes its full operation cycle. The position detector monitors the covering material's location during expansion, and the control device receives feedback to determine when to issue a stop command, preventing collisions with blocking objects before they occur.
Solution Approach 2:
The patent implements feedback through a position detector connected to the motor shaft that continuously monitors the covering material's position. The control device receives this feedback information and dynamically adjusts the motor operation, stopping the motor when the covering material approaches the target position or encounters a blocking object, thus preventing damage while maintaining operational efficiency.
2Ease of operation
If manual calibration of upper and lower limits is performed using a position detector, then the motor can automatically stop at correct positions, but the position detector information deviation accumulates over time requiring recalibration
Solution Approach 1:
The patent applies self-service by enabling the system to automatically detect and adapt to position deviations without requiring manual recalibration. The control device continuously receives feedback from the position detector and adjusts the stop commands based on actual covering material position, allowing the system to self-correct for accumulated measurement errors over time.
Solution Approach 2:
The patent uses feedback to continuously monitor the actual position of the covering material and compare it with the expected position from the position detector. When deviations are detected, the control device adjusts future stop commands accordingly, eliminating the need for manual recalibration and maintaining measurement precision over extended operation periods.
3Adaptability or versatility
If multiple operable rails are moved without distance detection, then the window treatment can provide multiple shading effects, but the rails may bump into each other or cords may become tangled
Solution Approach 1:
The patent implements feedback through distance detection circuits that continuously monitor the spacing between multiple operable rails. The control device receives this feedback and adjusts the movement of each rail independently, stopping or slowing down rails when they approach minimum safe distances, thereby preventing collisions and cord tangling while maintaining versatile shading configurations.
Solution Approach 2:
The patent introduces an intermediary control mechanism that mediates between the independent movement commands for multiple rails and the physical constraints of the system. The control device acts as an intermediary, coordinating rail movements based on real-time distance feedback to ensure safe operation while preserving the adaptability of multi-rail shading configurations.
Data Source
AI summary
A motorized window treatment has a headrail, a first operable rail and a second operable rail, a driving device, a distance detection circuit, a receiving circuit and a motor control circuit. The motor control circuit is coupled with the receiving circuit and the distance detection circuit for configuring the driving device to move the first operable rail and the second operable rail according to the signals received by the receiving circuit. When the receiving circuit receives a command signal to move the second operable rail towards a target position and the first operable rail locates between the second operable rail and the target position, the motor control circuit configures the driving device to move the second operable rail and the first operable rail collectively towards the target position.