Gap Sensor Edge Detection on Inclined Workpiece Surfaces
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Solution Overview
Problem
Accurate detection of workpiece edges is challenging, especially when the workpiece is inclined, as existing methods struggle to maintain precision in such scenarios.
Innovation Solution
A workpiece edge position detection device and method that uses a gap sensor mounted on a processing head to maintain a constant distance to the workpiece, detecting edge positions based on variations in the space between the sensor and the workpiece, which triggers edge detection when a predetermined threshold is reached.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a gap sensor is used to detect workpiece edge position, then detection capability is provided, but accurate detection becomes difficult when the workpiece surface is inclined
Solution Approach 1:
The processing head is made dynamically adjustable in position while scanning the workpiece surface. The control unit continuously adjusts the processing head position based on gap sensor feedback to maintain a constant distance from the workpiece surface, even when the surface is inclined. This dynamic position adjustment enables accurate edge detection regardless of surface orientation.
Solution Approach 2:
A feedback control mechanism is implemented where the gap sensor continuously measures the distance between the processing head and workpiece surface, and the control unit uses this information to adjust the processing head position. This closed-loop feedback system ensures that the processing head maintains optimal positioning for accurate edge detection even on inclined surfaces.
2Measurement precision
If the processing head position is fixed during scanning, then device complexity is reduced, but detection accuracy deteriorates on inclined surfaces
Solution Approach 1:
The system performs self-adjustment through automated feedback control. The control unit automatically adjusts the processing head position based on real-time gap sensor measurements without requiring external intervention or complex manual positioning mechanisms. This self-service approach maintains detection accuracy while avoiding excessive device complexity.
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 accurate detection of workpiece edges even in situations with inclined parts, ensuring precise alignment and processing on originally flat workpieces.
Implementation Method 1
a gap sensor mounted on a processing head to maintain a constant distance to the workpiece, detecting edge positions based on variations in the space between the sensor and the workpiece
Data Source
AI summary
Provided is a workpiece edge position detection device with which it is possible to accurately detect the position of a workpiece edge even under conditions in which an inclined portion is present on the workpiece. A workpiece edge position detection device includes: a control unit that controls the position of a machining head, on which a gap sensor is mounted, such that a spacing with respect to the workpiece as detected by the gap sensor remains fixed while the machining head is scanned along the surface of the workpiece; and a workpiece edge detection unit that, during execution by the control unit of the control for keeping the gap fixed, detects the position of an end section of the workpiece on the basis of the coordinate position of the machining head when the amount of variation in the spacing between the gap sensor and the workpiece has reached or exceeded a prescribed threshold value.