Instrument verifys tyre type
An
Oxford Sensor Technology product story
Edited by the Engineeringtalk editorial team
Nov 9, 2007
Location of the centre of the wheel and bolt/stud holes is achieved by the greyscale camera system, allowing fast and accurate location for pick and place or wheel fitting robots.
OST has released to verify tyre and wheel type, allowing tyre manufacturers, wheel suppliers, automotive manufacturers and logistical support providers to verify crucial information such as DOT codes and ensures the correct tyre is fitted on the correct style of wheel.
Reading black text on a black background is extremely difficult using conventional imaging systems.
To overcome this problem OST has developed a high-speed 3D scanning solution.
A radial scan of the tyre sidewall is made using a high-speed camera and a laser light source.
This allows a 3D profile to be constructed.
The information is converted into a greyscale image, where the shade of each pixel represents the height of the tyre's surface.
Filtering allows the natural curve of the tyre to be removed and features to be easily analysed.
The DOT code, or any other region of interest, is located and the text read using character recognition software.
A traditional area vision camera, coupled to a suitable illumination system allows the wheel style and size to be verified by automatically identifying the spoke pattern (or other features) and measuring the diameter of the rim Depending on the specific application, either a greyscale camera or a barcode reader can be included to read supplier barcodes or matrix codes.
Location of the centre of the wheel and bolt/stud holes is achieved by the greyscale camera system, allowing fast and accurate location for pick and place or wheel fitting robots.
OST can provide vision systems to be incorporated into existing installations or, working in conjunction with integration partners, complete handling systems.
The results from all the checks are sent to a PLC or computer network via Ethernet or a bus network system.
The technology provides fast, accurate 100% inspection of safety critical features.
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