Direct Drive Mover Position Calibration via Visual Detection
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Solution Overview
Problem
Contact-based calibration methods in direct drive transmission systems are inefficient and lack accuracy, especially when dealing with multiple movers, leading to cumbersome operations and reduced calibration reliability.
Innovation Solution
A non-contact visual detection system using an image acquisition device and feature recognition to determine the actual coordinate position of movers, generating a calibration signal based on detected position deviations, thereby improving calibration efficiency and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If contact-based calibration using a dial indicator is used, then position calibration can be performed, but the operation becomes cumbersome and inefficient when there are many movers
Solution Approach 1:
The patent replaces the mechanical dial indicator system with an optical vision system. The vision system uses cameras to capture images of markers on movers and calculates positions through image processing, eliminating the need for manual mechanical measurement and significantly improving calibration efficiency when dealing with multiple movers
Solution Approach 2:
The patent uses visual markers (targets) placed on movers that can be captured by the vision system. These markers serve as optical copies or representations of the mover positions, allowing the system to detect and measure positions remotely without physical contact, thereby simplifying operations and improving productivity
2Measurement precision
If contact-based calibration with frequent movement of the dial indicator is performed, then all movers can be calibrated, but calibration accuracy cannot be ensured
Solution Approach 1:
The mechanical dial indicator is replaced with a non-contact vision measurement system. The vision system maintains a fixed observation position and uses optical fields to measure all movers, eliminating the accuracy degradation caused by frequent physical movement of the measurement tool while maintaining high calibration efficiency
Solution Approach 2:
The patent introduces visual markers as intermediaries between the vision system and the movers. These markers provide high-contrast, easily detectable features that enable precise position measurement without direct physical contact, ensuring calibration accuracy while allowing efficient batch processing of multiple movers
Data Source
AI summary
The present invention provides a method and device for calibrating a position of a mover in a direct drive transmission system. In response to receiving an arriving signal for a mover corresponding to a preset detection station, an image acquisition device disposed above the detection station is controlled to acquire an image of the mover; feature recognition is performed on the image of the mover, and an actual coordinate position of a preset feature image area is acquired in the image of the mover; a mover-arriving detection result is generated based on the actual coordinate position; and a calibration signal for the position of the mover is generated based on the mover-arriving detection result.