Non-Contact Surface Measurement of Large Objects
Non-Contact Surface Measurement of Large Objects
Measurement is very important in many branches of science and industry. Data acquired by measurement is the starting point for many other processes and this data may be used in many very different ways.
Non-contact measurements offer a number of advantages over contact methods. However, all existing techniques are limited. The limiting factor for large objects is resolution. When measurement objects become very large (e.g. aircraft wings, ship hull panels) achieving sufficient levels of accuracy becomes difficult or even impossible.
The purpose of this project is the development of scalable measurement techniques that allow for the measurement of objects of virtually any size, whilst retaining the required high accuracy levels.
Taking into account limitations of the existing techniques, it was decided to perform separate partial measurements of the object and then to combine these sub-panels to form a single large resulting image for the entire object.
The main parts of the project are:
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Choosing the technique for partial measurements and it’s practical implementation. Currently it was decided to use Fourier Fringe Analysis
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Developing the technique of stitching together partial images
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Creating the measurement system using a moving positional sensor
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Developing a dynamic calibration technique
Viktor Hovorov.
