Movable Barrier Actuator With Automatic End-Stop Recognition
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Solution Overview
Problem
Existing drive operators for movable barriers like roller blinds require complex and time-consuming procedures for installing and updating end-stop positions, especially after changes in the system configuration, which can lead to mechanical stress and premature degradation due to incorrect association of rotation directions and end-stop recognition.
Innovation Solution
The drive operator automatically discriminates between high and low end-stop positions by analyzing the time course of a reference signal representing torque or resistance, using electronic circuits and microprocessors to assign correct rotation directions without manual assistance, and periodically updates end-stop positions to adapt to changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex programming procedures are used to program end-stop positions, then end-stop recognition precision is improved, but installation time and user expertise requirements increase
Solution Approach 1:
The drive operator automatically detects and programs end-stop positions using its own motor current measurements without requiring external programming devices or expert intervention. The system performs self-diagnosis and self-programming by monitoring current peaks during automatic movement between end-stops, eliminating the need for complex manual programming procedures while maintaining high precision.
Solution Approach 2:
The patent replaces complex manual programming procedures with automatic electronic detection based on motor current analysis. Instead of requiring users to follow lengthy programming sequences, the system uses electronic circuits to monitor motor current peaks that occur when mechanical constraints are reached, automatically storing these positions as end-stops.
2Manufacturing precision
If manual programming procedures are required for end-stop positions, then configuration accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The drive operator autonomously performs end-stop detection and programming by monitoring its own motor current characteristics. The system automatically moves the barrier, detects current peaks indicating mechanical constraint contact, and stores these positions without requiring user intervention or expertise in programming procedures.
Solution Approach 2:
The patent introduces motor current as an intermediary parameter to indirectly detect end-stop positions. Instead of requiring direct user interaction with mechanical constraints or complex programming interfaces, the system uses current measurements as a mediator to automatically identify and record end-stop configurations with high accuracy.
3Stability of the object's composition
If end-stop positions are not automatically updated after system changes, then memory stability is improved, but adaptability deteriorates
Solution Approach 1:
The drive operator continuously monitors motor current during operation and automatically detects when end-stop positions have changed due to system modifications. When current peak patterns indicate new end-stop locations, the system updates its stored positions, ensuring adaptability while maintaining stable operation during normal use.
Solution Approach 2:
The patent implements dynamic end-stop position updating that adapts to system changes. The system transitions from static stored positions to dynamic detection by monitoring motor current characteristics, automatically adjusting end-stop configurations when mechanical constraints change while maintaining operational stability during normal conditions.
4Measurement precision
If mechanical constraints are used to define end-stop positions, then positioning accuracy is improved, but mechanical stress and degradation increase
Solution Approach 1:
The drive operator uses motor current feedback to detect end-stop positions before mechanical constraints are fully engaged. By monitoring current peaks that occur just before mechanical contact, the system can identify end-stop locations and stop the motor accordingly, reducing repetitive mechanical impacts while maintaining accurate positioning.
Solution Approach 2:
The patent introduces motor current as an intermediary detection mechanism that provides early warning of approaching end-stop positions. This current-based detection acts as a mediator between the motor control system and mechanical constraints, allowing the system to prepare for stopping and reduce impact forces while maintaining precise positioning accuracy.
Data Source
Figure 1
AI summary
An drive operator for a mobile barrier like a roller blind, sun awning or gate is described, suitable for moving the barrier with a motor between two end-stop positions defined by antagonist mechanical constraints. The drive operator comprises a device suitable for (i) monitoring, at the two end-stop positions, an electrical signal the pattern of which varies during the collision of the mechanical constraints in a substantially repeatable manner; (ii) calculating at least one value that expresses the difference between the pattern of said signal relative to one and to the other of the two end-stop positions; (iii) discriminating the two end-stop positions based upon said value.