Measuring Device for Moving Elongated Elements Using Magnetic Belt
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Solution Overview
Problem
Existing measuring devices for determining the length of moving elongated elements, such as reinforcing steel, suffer from inaccurate measurements due to friction rollers, especially for elements with rough surfaces.
Innovation Solution
A measuring device featuring an endless belt with permanent magnets that creates a frictional connection with the elongated element, allowing it to be moved synchronously without slipping, and utilizing a detection unit to record the length or feed movement, which can be integrated into existing systems without a separate drive, enabling precise measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If friction rollers are used to measure the length of moving elongated elements, then the measurement device is simple in structure, but the measurement precision deteriorates especially for elements with rough surfaces
Solution Approach 1:
An endless belt is introduced as an intermediary between the friction rollers and the elongated element. The belt provides a larger contact surface area with the element, improving frictional engagement and measurement precision while the rollers continue to provide the simple structural support and drive mechanism.
Solution Approach 2:
The contact surface area between the measuring device and the elongated element is increased by using an endless belt instead of direct roller contact. This parameter change enhances the frictional force and improves measurement accuracy, particularly for rough-surfaced elements.
2Measurement precision
If permanent magnets are arranged on the surface of the endless belt to contact the elongated element, then the frictional engagement is improved, but the device complexity increases
Solution Approach 1:
Permanent magnets are embedded within the endless belt as an intermediary layer, creating magnetic attraction forces that enhance frictional engagement with the elongated element without requiring direct mechanical contact or complex external magnet mounting structures.
Solution Approach 2:
The endless belt is constructed as a composite structure combining magnetic materials (permanent magnets) with flexible belt material, creating a unified component that provides both mechanical flexibility and magnetic attraction for improved engagement with the elongated element.
3Measurement precision
If the measuring device has no separate drive but is only pulled by the moving elongated element, then the measurement precision is improved by eliminating drive slippage, but the device cannot independently control measurement speed
Solution Approach 1:
The endless belt is designed to be self-driven by the frictional force from the moving elongated element itself. The element's motion automatically drives the belt and rollers without requiring an external motor, ensuring perfect synchronization while maintaining simplicity. The system adapts to the element's speed naturally.
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 solution provides a more accurate measurement of the length or feed of moving elongated elements by enhancing frictional contact and eliminating slippage, allowing for precise length determination and integration into existing systems, including the ability to measure multiple elements simultaneously.
Implementation Method 1
a frictional connection can be established between a surface of the moving elongated element and an outer surface of the endless belt by means of the permanent magnets
Data Source
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AI summary
The invention relates to a measuring device (6) for determining a partial length of a moving elongate element (2). The measuring device (6) has a continuous belt (9) that circulates around a first deflecting roller (7) and around a second deflecting roller (8), wherein permanent magnets (12) are arranged on the continuous belt (9) and a frictional connection between a surface (11) of the moving elongate element (2) and an outer surface (10) of the continuous belt (9) can be established by means of the permanent magnets (12), wherein a sensing unit (13) is provided, which is designed to sense the change in position of the continuous belt (9).