Objective
Three coordinate measuring machines (3 CMMs) are used throughout industry to determine if complex parts are within the required tolerances. In general the machines operate on an automatic or semi-automatic basis in accordance with a predetermined routine. The results are then analysed by a computer using algorithms derived for specific geometrical shapes such as the straight line, plane, circle, ellipse, cylinder, cone and sphere. Since the user has no access to the evaluation programme or the algorithms employed he is forced to rely upon that the algorithms are able to cope with the problems met in practice and provide an accurate analysis. It is therefore to both the user's and the manufacturers'advantage to have available an independent means of verifying data evaluation programmes.
RESULTS
In the first phase of the project completed in 1987, data sets containing a range of deviations from ideal geometries, were produced for a range of geometrical forms. When these data sets were tested using programmes from 15 laboratories in Europe it was found that some analysis programmes were unable to interpret the information accurately.
The second phase of the project was established in association with 3 CMM manufacturers. It terminated 1990. Data sets have been produced for the same basic geometries but having higher demands on the evaluation programmes. It was shown that only about 50 % of the algorithms tested obtained acceptable results.
The data sets will be made available to industry. In order to maintain confidence in the result, it is necessary to keep the basis of the data sets secret. Potential users must therefore apply to PTB in Germany, via their own national metrology laboratories.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
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Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Data not available
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
BRAUNSCHWEIG
Germany
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.