Shape Sensor Devices for Moving Strip Edge Detection
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Solution Overview
Problem
Existing displacement-type shape sensor devices often fail to adequately detect edge shape defects in moving strips of material due to deactivation of sensors outside the material's width, leading to insufficient edge shape information and incomplete defect correction.
Innovation Solution
The implementation of a displacement-type shape sensor device with a higher number of sensors and the ability to shift their centerline positions transversely, allowing for better alignment with the strip edges and activation of additional sensors to cover the entire width, including edges, thereby improving detection resolution and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensors are deactivated when outside the material width, then sensor damage is prevented, but edge shape detection is insufficient
Solution Approach 1:
The system dynamically adjusts sensor activation status based on real-time material width detection. When material width varies, the controller selectively activates or deactivates sensors to match the current material boundaries, ensuring both protection and detection accuracy
Solution Approach 2:
The system performs preliminary detection of material width before the main measurement process. This preliminary action identifies which sensors should remain active, preventing damage while ensuring edge sensors are available for detection when needed
2Reliability
If sensors are deactivated to avoid damage, then sensor reliability is maintained, but shape information coverage is incomplete
Solution Approach 1:
The sensor activation state is dynamically controlled based on detected material width. The system transitions between active and inactive states for different sensors depending on whether material is present at their locations, optimizing both reliability and information coverage
Solution Approach 2:
The system uses feedback from material width detection to control sensor activation. The controller continuously monitors material presence and adjusts sensor activation accordingly, ensuring sensors are active only when material is present to provide information
3Measurement precision
If more sensors are used to cover strip edges, then detection precision is improved, but device complexity increases
Solution Approach 1:
The sensor array is designed with universal positioning capability, where sensors can serve multiple functions depending on material width. The same physical sensors provide both edge detection and center detection based on their dynamic activation, reducing the need for dedicated sensors for each function
Solution Approach 2:
The system uses dynamic activation to reduce the effective number of active sensors based on material width. When material is narrower, fewer sensors are activated, simplifying the operational complexity while maintaining detection precision for the actual material boundaries
Data Source
AI summary
Devices, systems and methods for detecting the shape of a moving strip of material with high resolution along the edges thereof. Device and system embodiments may include a plurality of displacement-type shape sensor assemblies that may be collectively linearly displaced in a direction substantially transverse to the direction of a moving strip of material being examined, and also selectively activated or deactivated as necessary so as to provide edge-to-edge strip coverage to the extent possible.