Coil Telescoping Measurement Using Multi-Line Laser Imaging
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Solution Overview
Problem
Telescoping in coils wound by hot-rolling lines leads to shape defects and increased error rates due to inconsistent winding positions, which existing measurement methods fail to accurately address.
Innovation Solution
An apparatus comprising a laser generation unit and a camera unit that captures images of laser lines on the coil's lateral surface, allowing the measurement unit to calculate the radii of inner and outer circles and determine the exact telescoping length by recognizing end points of multiple laser lines, thereby correcting for measurement inaccuracies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single laser line is used to measure telescoping, then the measurement process is simple, but measurement accuracy is insufficient due to environmental interference and difficulty in identifying valid measurement regions
Solution Approach 1:
The patent divides the measurement task into multiple segments by using three separate laser lines instead of one. Each laser line independently measures a specific region of the coil, and the measurement unit integrates these segmented measurements to determine overall telescoping. This segmentation allows for more comprehensive coverage of the coil surface and enables identification of valid measurement regions through endpoint detection, thereby improving measurement accuracy without excessive complexity increase.
Solution Approach 2:
The patent transitions from measuring a single linear dimension to measuring multiple dimensional aspects simultaneously. By projecting three laser lines at different positions and measuring their respective endpoints, the system captures spatial distribution information across the coil's width. This dimensional expansion enables more accurate telescoping measurement by considering variations across different regions rather than relying on a single measurement point.
2Measurement precision
If multiple laser lines are used to improve measurement accuracy, then measurement precision increases, but device complexity increases
Solution Approach 1:
The patent designs the measurement system with multi-functionality, where the same camera and processing unit handle multiple laser lines simultaneously. The measurement unit is configured to receive images containing multiple laser lines and process them through a unified algorithm that identifies endpoints and calculates telescoping. This universal approach allows the system to measure telescoping accurately using multiple laser lines without proportionally increasing device complexity, as the additional laser lines share the same detection and processing infrastructure.
3Ease of operation
If traditional measurement methods are used, then the system is simple to operate, but telescoping measurement accuracy is insufficient leading to quality issues
Solution Approach 1:
The patent implements self-service functionality where the measurement system automatically identifies valid measurement regions and performs telescoping calculation without manual intervention. The measurement unit autonomously detects laser line endpoints, determines which regions provide valid measurements, and computes the telescoping value. This self-service capability maintains ease of operation while significantly improving manufacturing precision, as the system eliminates manual measurement errors and consistently applies the measurement algorithm across all coils.
Solution Approach 2:
The system incorporates feedback mechanisms where the measurement results are used to monitor and control coiling quality. By continuously measuring telescoping using multiple laser lines and comparing results against quality standards, the system provides feedback that can trigger adjustments in the coiling process. This feedback loop maintains operational simplicity while ensuring manufacturing precision through automated quality monitoring and control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus stabilizes coiling quality by providing precise measurements of telescoping, reducing environmental interference and improving the accuracy of coil shape assessment.
Implementation Method 1
a laser generation unit configured to generate at least one laser line output to a lateral surface of the coil
Implementation Method 2
a camera unit configured to capture an image of the lateral surface of the coil, including the at least one laser line
Data Source
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AI summary
The present invention relates to an apparatus for measuring telescoping of a coil, which is a shape defect of the coil, prior to the coil being transferred after the coil is wound by a coiler of a hot-rolling line. The apparatus for measuring telescoping of a coil according to an embodiment of the present invention may comprise: a laser generation unit for generating at least one laser line that is output to a side of a coil to pass through the center of the coil; a camera unit for obtaining an image of the side of the coil including a plurality of laser lines; and a measurement unit for measuring, from the image obtained by the camera unit, a telescoping amount of the coil according to the length corresponding to the side of the coil among the lengths of the plurality of laser lines.