14 research outputs found
3D Digitalization of the Human Body for Use in Orthotics and Prosthetics
The motivation of this work was to find a suitable 3D
scanner for human body parts digitalization in the field of prosthetics
and orthotics. The main project objective is to compare the three
hand-held portable scanners (two optical and one laser) and two
optical tripod scanners. The comparison was made with respect of
scanning detail, simplicity of operation and ability to scan directly on
the human body. Testing was carried out on a plaster cast of the
upper limb and directly on a few volunteers. The objective monitored
parameters were time of digitizing and post-processing of 3D data
and resulting visual data quality. Subjectively, it was considered level
of usage and handling of the scanner. The new tripod was developed
to improve the face scanning conditions. The results provide an
overview of the suitability of different types of scanners
3D Topological Scanning and Multi-material Additive Manufacturing for Facial Prosthesis Development
Prosthetic-based rehabilitation is an alternative to and offers several advantages over surgical intervention. Prosthetic devices are commonly handmade, requiring significant amounts of skilled labour and subjective manufacturing techniques. This chapter discusses the use of industrial optical scanning methods to capture the surface topology from a volunteer’s facial anatomy. This data was then used to generate a 3D CAD model, which was further used to design a patient-specific prosthesis. Amongst the many advantages over the existing techniques are that data collection is non-intrusive, quick to collect and provides anatomically precise information. The use of 3D CAD models provides greater flexibility when developing and evaluating design iterations and further allows for the creation of ‘part libraries’ for use where patients have no initial reference anatomy. Such patient data can also be kept on record should it be required for future use. The final prosthesis is realised through high-resolution, multi-material additive manufacturing, providing precise model reproduction and adding functionality such as mimicry of soft and hard tissues. This approach provides an optimised, low-cost method for streamlining similar prosthesis production
Information-Rich Manufacturing Metrology
Part 4: Digital Technologies and Industry 4.0 ApplicationsInternational audienceInformation-rich metrology (IRM) is a new term that refers to an approach, where the conventional paradigm of measurement is transcended, thanks to the introduction and active role of multiple novel sources of information. The overarching goal of IRM is to encompass and homogenise all those measurement scenarios where information available from heterogeneous sources, for example, from the object being measured, the manufacturing process that was used to fabricate it, the workings of the measurement instrument itself, as well as from any previous measurements carried with any other instrument, is gathered and somewhat incorporated with an active role into the measurement pipeline in order to ultimately achieve a higher-quality measurement result (better metrological performance, shorter measurement times, smaller consumption of resources). Examples of IRM in action in precision and additive manufacturing will be presented, including the measurement of form and texture