Results 41 to 50 of about 1,399,412 (310)

A Fast and On-Machine Measuring System Using the Laser Displacement Sensor for the Contour Parameters of the Drill Pipe Thread

open access: yesSensors, 2018
The inconvenient loading and unloading of a long and heavy drill pipe gives rise to the difficulty in measuring the contour parameters of its threads at both ends.
Zhixu Dong   +3 more
doaj   +1 more source

The COSMOS Plate Measuring Machine [PDF]

open access: yesSymposium - International Astronomical Union, 1974
The new 48-in. Schmidt telescope of the U.K. Science Research Council is being commissioned at Siding Spring in Australia. Its potential both for extra-galactic and galactic research is enormous but this potential can only be fully exploited with an automatic measuring machine.
openaire   +1 more source

Automated planning to minimise uncertainty of machine tool calibration [PDF]

open access: yes, 2014
When calibrating a machine tool, multiple measurement tasks will be performed, each of which has an associated uncertainty of measurement. International Standards and best-practice guides are available to aid with estimating uncertainty of measurement ...
Longstaff, Andrew P.   +8 more
core   +1 more source

Five-Axis Machine Tool Coordinate Metrology Evaluation Using the Ball Dome Artefact Before and After Machine Calibration

open access: yesJournal of Manufacturing and Materials Processing, 2019
Now equipped with touch trigger probes machine tools are increasingly used to measure workpieces for various tasks such as rapid setup, compensation of final tool paths to correct part deflections and even verify conformity to finished tolerances.
Heidarali Hashemiboroujeni   +3 more
doaj   +1 more source

Machines for measuring [PDF]

open access: yesJournal of the Franklin Institute, 1879
n ...
openaire   +2 more sources

The RIPE NCC internet measurement data repository [PDF]

open access: yes, 2010
This paper describes datasets that will shortly be made available to the research community through an Internet measurement data repository operated by the RIPE NCC.
McGregor, Anthony James   +2 more
core   +1 more source

Roundness Deviation Measuring Strategy At Coordination Measuring Machines And Conventional Machines

open access: yes, 2009
Today technological process makes possible surface control of producing parts which is needful for product quality guarantee. Geometrical structure of part surface includes form, proportion, accuracy to shape, accuracy to size, alignment and surface topography (roughness, waviness, etc.).
Ocenašova, Lenka   +6 more
openaire   +4 more sources

Measurement of Free-Form Curved Surfaces Using Laser Triangulation

open access: yesSensors, 2018
Laser triangulation (LT) is widely used in many fields due to its good stability, high resolution and fast speed. However, the accuracy in these applications suffers from severe constraints on the data acquisition accuracy of LT.
Zhixu Dong   +3 more
doaj   +1 more source

Feasibility study of multi-point two-dimensional profile measurement by 3-2-1 and 3×3 sensor layout

open access: yesMeasurement: Sensors, 2021
New multi-point methods, the six-point method of 3-2-1 sensor layout and the nine-point method of 3 × 3 sensor layout, have been proposed as the two-dimensional profilometry for a machined flat surface.
Ryotaro Fujiwara, Hiroki Shimizu
doaj   +1 more source

A Novel Design of Through-Hole Depth On-Machine Optical Measuring Equipment for Automatic Drilling and Riveting

open access: yesApplied Sciences, 2018
In the aerospace manufacturing industry, it is impossible to achieve precise and efficient automatic drilling and riveting for largescale composite board parts.
Nianhan Wu   +4 more
doaj   +1 more source

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