A 3D scanner for the hand

A 3D scanner for the hand

Weiss, A.J.

Molenbroek, J.F.M. (mentor)
Song, Y. (mentor)

Industrial Design Engineering

Industrial Design

2017-04-28

This thesis puts forward a design for an affordable 3D scanner that can easily capture accurate 3D models of the human hand. Such 3D scans are a requirement for designing and manufacturing personalised products, which open up a new world of design possibilities by tailoring products specifically to a single person. An example of such a product is Carpifix, a personalised wrist orthosis that takes away key usage problems present in current orthoses. In addition 3D scanning can be used to objectively track progress of hand therapy or to gather detailed anthropometric data, including multidimensional shape information, for product design or other medical purposes. A highly iterative approach is used to further develop the photogrammetry-based scanning technology and integrate it into a comfortable and easy to use to product. Key aspects of the scanner are a practical, secure and reliable system architecture, and low-cost components. In addition, it includes an interface both on the scanner and a separate application to facilitate an effortless and structured process of scanning, processing, utilising and archiving 3D models in the various relevant contexts. Thereby allowing anyone, including people who are not skilled anthropometrists, to obtain accurate measurements. Evaluation using a prototype shows the design is capable of producing accurate and complete reconstructions of the hand and ±15 cm of the arm with a 90% success rate. Defects in the remaining 10% of scans are generally limited to a section of the arm, with the hand reconstructed properly. The integrated design developed as part of this project is sufficiently robust to be evaluated in a real-world pilot application. From this the product’s embodiment design should to be further optimised for manufacturing and the interaction concept further evaluated and implemented. In addition, development of further software features such as automatic measurement and treatment progress tracking that unlock the potential of 3D scanning as well as cloud processing should be considered. Finally, additional improvements to the scanning system may be evaluated if it is determined that the current reconstruction quality is not sufficient or its limitations are problematic.

3D scanning
photogrammetry
anthropometry
hand
design

http://resolver.tudelft.nl/uuid:212a5727-d316-4a16-a634-8954a83acff5

2018-04-28

Campus only

Student theses

master thesis

(c) 2017 Weis, A.J.