CORDIS provides links to public deliverables and publications of HORIZON projects.
Links to deliverables and publications from FP7 projects, as well as links to some specific result types such as dataset and software, are dynamically retrieved from OpenAIRE .
Exploitable results
Chemical industry and Energy providers have a genuine economical interest to improve plant availability and reduce maintenance costs. Non destructive testing is used to detect flaws before they become critical and to predict remaining plant lifetime as accurately as possible. Therefore, increasing the reliability and accuracy of inspections while reducing the overall costs is a key demand from the industry.
The goal of the MISTRAL project is to design, develop, and evaluate multi-sensor approaches on welded components shared by most of the companies in the above mentioned fields
MISTRAL was meant to demonstrate the efficiency of a multi-technique approach to non destructive testing for radiography and ultrasonic testing on the one hand and for ultrasonic testing and eddy-current testing on the other hand.
During the first part of the project the partners decided to select a generic family of components instead of compiling a list of special cases. The component family finally chosen was generic, multi-material, welded tubes with a wide range of diameters.
Depending on the NDT techniques involved, the area of interest varies: For EC and UT fusion defects must be located at or close to the access surface of the component whereas for XR and UT fusion one is more interested in flaws in the volume.
Two prototypes of the combined EC+UT probe have been built and successfully tested: One probe is adapted to the surface of the Core Spray Nozzle (a mock-up for one of the components mentioned in the previous chapter), the other probe has a flat bottom. Extensive tests with these probes have been performed.
The acquisition procedure for XR+UT had to address one big challenge : the Coordinates for both inspections had to be provided in a common reference system with high accuracy. This difficulty has been fully addressed. The present procedure has led to fully relevant XR+UT data sets.
Conversion modules to convert most of the proprietary data formats produced by the partners to the trappist standard format are now available.
The processing tools developed by MISTRAL are a set of inversion modules which make each set of single technique data more legible and less noisy. These algorithms which had been available since mid-term, have been further improved and finalized.
The multi technique fusion algorithms are now available : they consist of a prototype Bayesian classifier for data fusion produced by the University of Cagliari, a weighted sum fusion module produced by TNO and a module applying the Dempster-Shafer combination rule delivered by EDF.
The so-called MISTRAL industrial prototype is mainly a combination of the above mentioned results. They were fully integrated and equipped with an advanced user interface backed by a commercial visualization software (currently this is AVS/Express).
A fracture mechanics code was delivered with an integrated user interface. Tests were performed.
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