Localised Non-Contact Measurement Systems (<10m).
(Next Generation Composite Wing State of the Art Reports
, pp. ? - ?
Scope A review of sub millimetre non-contact measurement technologies at scales of less than 10 metres. These include optical triangulation devices (such as photogrammetry, structured light etc); line-of- sight devices (such as laser radar), and non-optical instruments (such as ultrasound). Key conclusions on the most relevant (for Airbus use) current state of the art technologies • Photogrammetry: Mature technology suitable for automation as multiple cameras allow full object coverage. Very fast (ms) measurement speed. Typical accuracy of 5 parts in 105 • Line scanners: Mature technology with various configurations, current SoA in terms of accuracy is circa 1 part in 104 . 3D measurements typically take several seconds. • Structured light (fringe projection) devices: Less mature technologies but with potential for higher accuracies, the current SoA is circa 1 part in 105 . Typically takes several seconds. Key recommendations on technologies / future developments for applications in MAA • Photogrammetry and phase fringe projection are developing towards convergence. • Scene recognition and rapid 3-D shape measurement will automate linking to CAD data. • Automated, self-calibrating and close range systems will be chained together for large scales. • Tomographic 3-D reconstruction has potential for directly measuring hidden features (gaps). • Internationally accepted standards for traceable calibration are lacking and are required.
|Title:||Localised Non-Contact Measurement Systems (<10m)|
|Keywords:||Metrology, Non contact|
|UCL classification:||UCL > School of BEAMS > Faculty of Engineering Science > Civil, Environmental and Geomatic Engineering|
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