Signature image processing: Difference between revisions - Wikipedia

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Unlike systems that log information for later study or that use X-rays or ultrasound to check samples, this technology looks at the electrical signal and detects faults when they occur.<ref name = ATSsitwe1>http://ats.business.gov.au/companies-and-technologies/building-and-construction/welding-technologies-innovations </ref> Data blocks of 4,000 points of electrical data are collected four times a second and converted to signature images. After image processing operations, statistical analyses of the signatures provide quantitative assessment of the welding process, revealing its stability and reproducibility, and providing fault detection and process diagnostics.<ref>Simpson, SW (2007) "Statistics of signature images for arc welding fault detection", ''Science & Technology of Welding and Joining'', '''12(6)''', 557–64</ref> A similar approach, using voltage-current histograms and a simplified statistical measure of distance between signature images has been evaluated for tungsten inert gas (TIG) welding by researchers from Osaka University.<ref>Matsubara T, Terasaki H, Otsuka H, and Komizo Y (2010) "Developments of real-time monitoring method of welding" (paper RAJU-VE1), ''Proceedings of the Visual-JW2010''</ref>

== Industrial use application==▼

SIP is the basis for the ''WeldPrint'' system (owned by the University of Sydney). ''WeldPrint'' was developed with the assistance of an Australian government ''R&D Start'' grant (1999–2001), after support by the [[Australian Research Council]] for the fundamental research (1997–2001). The system consists of a front-end interface and software based on the SIP engine, and relies on electrical signals alone. It is designed to be non-intrusive and sufficiently robust to withstand harsh industrial welding environments. The first major purchaser of the technology, [[Holden|GM Holden]]<ref>"Holden orders award-winning weldprint welding technology", ''Techwatch'', Price Waterhouse Coopers, '''12(6)''', 2002,</ref><ref> "Holden purchases award winning weldprint welding technology", ''Australian Technology Showcase'' http://www.techshowcase.nsw.gov.au/ News and Events (2002)</ref><ref>"University weld checker to be used by Holden", ''Australian Innovation Magazine'', '''3–5/02''', 29</ref> provided feedback that allowed the system to be refined in ways that increased its industrial and commercial value. Improvements in the algorithms, including multiple parameter optimization with a server network, have led to an order-of-magnitude improvement in fault-detection performance over the past five years.{{fact}}

▲== Industrial use ==

[[Image:SIP weld analysis of driveshafts.jpg|thumb|240px|The technology in use on a shop floor.]]

The ''WeldPrint'' software received the ''Brother business software of the year award'' (2001); in 2003, the technology received the A $100,000 inaugural ''Australasian Peter Doherty Prize for Innovation'';<ref>"Bright sparks join forces to take out Doherty Prize", ''The Australian'' (national newspaper)—''Higher Education Supplement'', 2 April 2003</ref><ref name = abcsite1> *{{cite web|url=http://www.abc.net.au/ra/innovations/stories/s852363.htm|title=Weldprint Wins Award|publisher=[[Radio Australia]]|work=Innovations|date=11 May 2003|accessdate=19 January 2011}}</ref>