Conveyed Sheet Measurement Frame Synchronization Using Speed Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The synchronization of multiple frames for scanning and measuring a conveyed sheet is compromised when the sheet extends or its speed varies, leading to reduced accuracy.
Innovation Solution
A measurement system with a synchronization control unit that includes a speed calculator to determine the sheet's speed in each frame and a controller to adjust the scanning timing of each frame based on these speeds, ensuring they measure the same position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple frames scan and measure a conveyed sheet simultaneously, then measurement productivity is improved, but synchronization accuracy deteriorates when sheet speed varies or sheet extends
Solution Approach 1:
The system dynamically adjusts the scanning timing of each frame based on the actual sheet speed measured in that frame. Instead of using a fixed synchronization schedule, the controller modifies the scanning timing for each frame individually according to real-time speed variations, allowing the system to maintain synchronization accuracy while measuring multiple sheets simultaneously for high productivity
Solution Approach 2:
The system implements a feedback mechanism where the measured sheet speed in each frame is fed back to the controller, which then adjusts the scanning timing for that frame based on the speed information. This closed-loop control ensures that synchronization accuracy is maintained despite variations in sheet speed or extension, while enabling simultaneous measurement across multiple frames for improved productivity
2Ease of operation
If fixed scanning timing is used for multiple frames, then control simplicity is maintained, but measurement precision deteriorates due to sheet speed variations
Solution Approach 1:
The system transitions from static fixed scanning timing to dynamic timing adjustment. The controller automatically modifies each frame's scanning timing based on the actual sheet speed measured in that frame, maintaining measurement precision while keeping the overall control process simple through automated speed-based timing adjustment
3Device complexity
If sheet speed is not accounted for in synchronization, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The system employs self-service by having each frame measure its own sheet speed and use that information to adjust its scanning timing. This self-adjustment mechanism maintains synchronization accuracy without requiring complex centralized control calculations, thereby achieving high measurement precision with relatively simple control system architecture
Data Source
AI summary
A measurement system includes a plurality of frames each of which scans and measures a sheet being conveyed, and a synchronization control unit which synchronously controls each of the frames. The synchronization control unit includes a speed calculator which calculates a speed of the sheet in each of the frames, and a controller which controls each of the frames so that each of the frames scans and measures the same position of the sheet on the basis of a calculated speed of the sheet in each of the frames calculated by the speed calculator.