3D Shape Sensing of Elongated Objects Using Fibre Bragg Gratings
Navigating in GPS deprived areas can be a challenging task, especially when the environment doesn’t offer sufficient visual clues for stereo camera matching. This paper describes the development of a 3D shape sensor based on optical fibres and the resulting “Sensor Wand”. The intension was to develop a Wand that could be easily deployed in small holes like drill holes for mining or geo-technical applications and determine their 3D shape, which is a vital information for Drill and Blast Engineers in mining, or a geo-technical assessment in civil applications. Initially the expected response of the Wand was modelled for a number of configurations. A Wand was then manufactured to verify the simulated results. The mechanical manufacturing proved itself to be significantly more complex than originally anticipated. As a result, the sensor accuracy was below expectation. Improvements to the manufacturing process were identified to increase the performance of the next generation of the Sensor Wand.
Keywords3D shape sensing Fibre optic sensing Fibre bragg grating FBG
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