Measuring Roller Layout for Accurate Strip Edge Detection Under Vibration
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Solution Overview
Problem
Existing measurement rolls for determining the location of a band edge of a band-shaped estate, particularly metal bands, face challenges such as measurement errors due to vibrations and ineffective transverse force management, leading to inaccurate planning deviations.
Innovation Solution
A measurement roll design featuring a measuring roller body with recesses containing bars supported by strength sensors, where the bars are arranged diagonally to determine the position of the band edge relative to a reference point or line by analyzing the force measurement over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If force sensors are arranged in recesses with seals (O-ring or plastic layer) to prevent dirt penetration, then the sealing effectiveness improves, but transverse forces from strip tension cause measuring roller deflection that simulates strip unevenness and disrupts measurement accuracy
Solution Approach 1:
The patent applies asymmetry by positioning the beam asymmetrically within the recess relative to the force sensor. The beam is arranged such that its longitudinal axis does not run parallel to the rotation axis and does not lie in a plane perpendicular to the rotation axis. This asymmetric positioning allows the beam to effectively detect strip edge positions while the force sensor measures only forces perpendicular to the beam, filtering out transverse deflection forces caused by roller deformation due to sealing requirements.
2Measurement precision
If individual force sensors are distributed around the circumference to measure flatness, then flatness detection capability improves, but measurement errors occur when the metal strip vibrates near a reel
Solution Approach 1:
The patent extracts the strip edge detection function from the general flatness measurement system. Instead of using multiple distributed sensors to detect flatness, a single beam is positioned to specifically detect the moment the strip edge makes contact. The beam's unique angular orientation allows it to detect strip edge position through force changes, separating this specific detection task from the overall flatness measurement system and making it immune to vibration-induced errors that affect distributed sensor arrays.
3Device complexity
If the beam's longitudinal axis runs parallel to the rotation axis or in a plane perpendicular to it, then the structural simplicity improves, but the ability to determine strip edge position relative to reference points deteriorates
Solution Approach 1:
The patent applies dimensionality change by orienting the beam's longitudinal axis in a third dimension - neither parallel to the rotation axis nor in a perpendicular plane. The beam is arranged at an oblique angle, creating a three-dimensional configuration that allows the force sensor to detect strip edge contact forces with precise angular resolution. This spatial arrangement enables accurate determination of strip edge position relative to reference points on the roller surface, transforming a two-dimensional measurement problem into a three-dimensional solution.
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
This design allows for precise determination of the band edge position, reducing measurement errors and improving the accuracy of planning deviations, even under conditions of vibration.
Implementation Method 1
a force sensor (303, 304) arranged in the recess (300)
Data Source
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AI summary
Measuring roller for determining a property of a strip-shaped material, in particular a metal strip, guided over the measuring roller, comprising: - a measuring roller body with a circumferential surface, - at least one recess in the measuring roller body, which is arranged at a distance from the circumferential surface or leads from the circumferential surface into the interior of the measuring roller body, and - a first force sensor arranged in the recess, and a second force sensor arranged in the recess or in a further recess adjacent to the recess, wherein the first force sensor has a sensor surface and the first force sensor can generate a sensor signal when the position of the sensor surface of the first force sensor changes, and the second force sensor has a sensor surface and the second force sensor can generate a sensor signal when the position of the sensor surface of the second force sensor changes.