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US 8,464,575 B2Granted
Device and method for measuring the geometry of a workpiece
AssigneeMarposs, S.p.A.
InventorIvan Basar
Life of this patent
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AssigneeMarposs, S.p.A.
InventorIvan Basar
Estimating the term…
In order to improve a device for measuring the geometry of a workpiece in such a way that the geometrical measurements are particularly precise wherein the device comprises a housing having a flow channel in which there is arranged a reference nozzle for the passage of a test fluid therethrough and a first pressure measuring device for measuring a first pressure of the test fluid upstream of the reference nozzle and also a second pressure measuring device for measuring a second pressure of the test fluid downstream of the reference nozzle, it is proposed that the device should comprise a differential pressure measuring device for measuring the differential pressure of the test fluid across the reference nozzle.
A method for measuring the geometry of a workpiece, wherein a test fluid is arranged to flow through a reference nozzle located in a flow channel of a housing, wherein a first pressure of the test fluid is measured upstream of the reference nozzle and wherein a second pressure of the test fluid is measured downstream of the reference nozzle, wherein, in addition to the first pressure of the test fluid and the second pressure of the test fluid, the differential pressure of the test fluid across the reference nozzle is measured and/or in that the moisture content of the test fluid is measured, wherein there is determined a deviation between a measured differential pressure of the test fluid and the difference between a first measured pressure of the test fluid and a second measured pressure of the test fluid.
Dependencies are inferred from the claim text.