Laser Machining Region Detection for Sheet Metal on Support Projections
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Solution Overview
Problem
Existing sheet metal machining systems struggle to accurately recognize the shape and dimensions of the sheet metal due to the interference of the support member being detected as a bright region in the image, leading to recognition errors.
Innovation Solution
A laser machining system with a sheet metal support member having protrusions, a camera with an optical axis parallel to the support member direction, and an illuminator to minimize the support member's visibility, allowing for accurate detection of the machining available area by processing the captured image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sheet metal support member is used to hold the sheet metal, then the sheet metal can be properly positioned and supported, but the support member itself is detected as a bright region in the image, causing recognition errors of the sheet metal shape and dimensions
Solution Approach 1:
The support member is designed with a black coating or black-colored protrusions that absorb light rather than reflect it. This color change from reflective to absorptive surfaces ensures the support member does not appear as a bright region in images captured by the camera, eliminating false detections and enabling accurate recognition of the sheet metal's shape and dimensions.
2Measurement precision
If the camera optical axis is oriented parallel to the support member direction, then the support member appears minimized in the image, but this requires precise camera positioning and orientation
Solution Approach 1:
By making the support member black rather than adjusting camera orientation, the system achieves accurate detection without complex positioning requirements. The black support member absorbs light and becomes invisible to the camera, eliminating the need for precise optical axis alignment.
3Ease of operation
If the support member is made visible for positioning purposes, then positioning is easier, but the support member interferes with image processing and causes false detection of bright regions
Solution Approach 1:
The support member is coated black to be invisible in images, but its positioning function is maintained through physical features such as protrusions that mechanically guide the sheet metal. The black coloration allows the support member to remain functional for positioning while eliminating interference with image processing.
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 system effectively reduces the likelihood of the support member being detected as a bright region, enabling precise recognition of the sheet metal's shape and dimensions for accurate machining.
Implementation Method 1
an illuminator to illuminate the sheet metal and circuitry configured to process an image captured by the camera to detect a bright region in the image
Data Source
AI summary
A sheet metal working system includes a laser machining apparatus for processing a sheet metal in a laser machining region, a camera for photographing the laser machining region, an illuminator for illuminating the sheet metal, and circuitry configured to process an image photographed by the camera. The laser machining apparatus includes a sheet metal support member having a plate shape, the sheet metal support member having a plurality of elongated projections arranged in a first direction in a laser machining region. The sheet metal is disposed on the plurality of elongated projections. The camera is arranged such that the optical axis of the camera is oriented substantially parallel to the first direction when viewed in the height direction of the laser machining apparatus. The circuitry detects a bright region in the image as a machining available area of the sheet metal.