Segmented Measuring Roller for Transverse Web Tension Profiling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional force-measuring devices for web materials only provide tension measurements across the entire width of the roller, failing to offer precise information about the distribution of web tension along the transverse direction, which is essential for further processing of cut webs in applications like label printing or packaging.
Innovation Solution
A segmented measuring roller with multiple, independently movable and lockable measuring segments, each equipped with a force transducer and strain gauges, allows for precise measurement of web tension along the transverse direction by routing measurement signals through axially extending electrical conductors to an evaluation unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional force-measuring device with a single roller is used, then the web tension across the entire width can be measured, but precise information about the distribution of web tension along the transverse direction cannot be obtained
Solution Approach 1:
The measuring roller is divided into multiple independently movable measuring segments, each equipped with its own force transducer. This segmentation allows each segment to measure web tension at its specific transverse position, enabling precise mapping of tension distribution across the web width while keeping each segment's structure relatively simple and standardized.
Solution Approach 2:
The invention transitions from a single-point or integrated width measurement to multi-point transverse direction measurement by distributing measuring segments across the roller width. This dimensional expansion from one measurement point to multiple points across the transverse dimension enables comprehensive tension distribution mapping.
2Measurement precision
If multiple measuring segments are added to measure web tension distribution, then precise transverse direction tension information is obtained, but the device complexity increases
Solution Approach 1:
Each measuring segment is designed as a universal module that can be positioned at different transverse locations on the roller. The segments are identical in structure and function, allowing standardized manufacturing and simplifying the overall system design despite having multiple measurement points. The electrical conductors also follow a standardized axial routing pattern.
Solution Approach 2:
The measuring segments are replicated across the roller width, with each segment being an identical copy of the basic measuring unit. This copying approach simplifies design and manufacturing by using the same standardized components repeatedly, rather than designing unique structures for each measurement position.
3Adaptability or versatility
If measuring segments are made movable and lockable on the axis, then adaptability to different measuring positions is achieved, but the ease of operation decreases
Solution Approach 1:
The measuring segments are designed to be dynamically positionable along the roller axis rather than fixed in predetermined locations. This dynamic positioning capability allows the segments to be moved to any required transverse position and locked in place, providing adaptability for different measurement configurations while maintaining operational simplicity through standardized locking mechanisms.
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
Enables precise measurement of web tension in individual longitudinal strips of cut webs and tension profiles of uncut webs, facilitating better control of winding processes and reducing rejects due to unsuitable tension ratios, while allowing adaptability to different measurement requirements.
Implementation Method 1
each comprise a force transducer, which serves to determine the web tension of the longitudinal section of the material web wrapping around the respective measuring segment
Data Source
Figure 1~2
Figure 3~4
Figure 5~7(b)
AI summary
The invention relates to a force measuring device (20) for detecting web tension of a moving material web (10), which has a longitudinal direction defined by the direction of travel and a transverse direction, wherein the force measuring device (20) has an axis (22) and a measuring roller (30) supported on the axis and enclosed by the material web. According to the invention, the measuring roller is designed as a segmented measuring roller (30) with two or more measuring segments (32), which are separately displaceable on the axis (22) and lockable in a measuring position on the axis in order to position the measuring segments (32) according to desired measuring positions in the transverse direction of the material web (10), so that longitudinal sections (12) of the material web each enclose a measuring segment (32).The measuring segments (32) each comprise a force sensor (36) which serves to determine the web tension of the longitudinal section (12) of the material web enclosing the respective measuring segment (32) and which provides a holder with which the measuring segment (32) rests on the axis (22). The axis (22) is provided with electrical conductors (26) extending substantially axially across its entire width, which can be contacted axially at any point and with which the measurement signals supplied by the force sensors (36) of the measuring segments (22) can be transmitted to an evaluation unit (28) arranged at one end of the axis.