Pulse Trigger Positioning for Moving Element Motion Control
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Solution Overview
Problem
Existing systems for positioning a mobile element relative to a fixed support for processing operations, such as laser cutting or image taking, are complex, expensive, and imprecise due to the difficulty in implementing calculations, corrections, and commands necessary for precise positioning and triggering actions.
Innovation Solution
A method and device that generate a pulse signal at triggering positions of a mobile element capable of movement in multiple degrees of freedom, by measuring actual positions in real-time, comparing them to desired positions, and emitting a pulse signal when the closest real position within a given limit is reached, facilitating precise and cost-effective implementation without requiring precise servo-control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a servo control system with master/slave architecture is used to control mobile element positioning, then positioning precision can be improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent replaces the complex mechanical servo control system with an optical measurement system. A laser interferometer measures the actual position of the mobile element, and a computer processes the position data to generate trigger signals, substituting mechanical feedback with optical measurement and computational processing.
Solution Approach 2:
The patent introduces a computer as an intermediary between the mobile element and the processing system. The computer receives position data from the laser interferometer, processes it to determine when trigger positions are reached, and generates trigger signals, simplifying the overall control architecture.
2Measurement precision
If real-time position measurement and comparison is implemented, then triggering precision is improved, but measurement and detection difficulty increases
Solution Approach 1:
The computer serves multiple functions: it processes position data from the laser interferometer, compares actual positions with predetermined trigger positions, determines when trigger conditions are met, and generates trigger signals. This multi-functionality consolidates what would otherwise require separate specialized systems.
Solution Approach 2:
The system implements feedback by continuously measuring the actual position of the mobile element using the laser interferometer, comparing it with predetermined trigger positions, and generating trigger signals when the mobile element reaches or exceeds a trigger position, creating a closed-loop control system.
Data Source
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AI summary
The generating device (1) comprises a unit (4) for generating triggering positions, a unit (5) for generating, during the course of the movement of the moving element, actual positions of said moving element, this unit (5) comprising a unit (6) for measuring successive effective positions of the moving element, the actual positions comprising at least these measured effective positions, a unit (8) for comparing, for a current triggering position, the actual positions successive to this current triggering position in such a way as to identify, among these successive actual positions, the closest actual position to said current triggering position, and this within a given limit, and a unit (10) for generating a pulsed signal for the current triggering position, if and when the moving element reaches said closest actual position and that this position is situated within the given limit.