Knowing the orientation of the head is important in many fields,including medicine. Many methods and measuring systems exist, but usually theyuse different markers or sensors attached to the subjects head for head orientationdetermination. In certain applications these attachments may represent a burden ora distraction to the subject under study which may have an unfavourable impact onthe measurement. We propose a non-contact optical method for head-to-trunkorientation measurement that does not require any attachments to the subjectunder study.
F.21 Development of new health/diagnostic methods/procedures
COBISS.SI-ID: 13136667This article presents a new system for 3D foot-shape measurements during walking. It is based on the laser-triangulation, multiple-line-illumination and color-modulation techniques. It consists of a walking stage and four measuring modules that simultaneously acquire the foot shape from the top, bottom and side views. The measuring speed is 30 fps. Custom-developed software makes it possible to analyze the foot's dimensions at an arbitrary cross-section by means of the width, height, girth and section orientation. Six subjects were measured during bare and shod walking, and the bare foot and the outside dimensions of the footwear during the entire stance phase are presented. The relative measurement repeatability of a single subject is 0.5% for bare foot and 1% for shod foot. This means that it is possible to study the differences between various influences on the foot-shape dynamics, such as a bare/shod foot, different loading conditions and the shoe's stiffness condition.
F.13 Development of new production methods and tools or processes
COBISS.SI-ID: 133775633D measuring systems for medical applications are presented. All systems were developed on Faculty of Mechanical Engineering, University of Ljubljana.
F.08 Development and manufacture of a prototype
COBISS.SI-ID: 12284955Inappropriate footwear is an important risk factor for diabetic foot ulcers, especially in patients with deformed legs and sensory neuropathy. The present study evaluates the method for measuring the leg with threedimensional laser measuring system, to collect data on the size and shape of the legs in a population of diabetic patients and to assess the viability of marketing footwear in a variety of length and width numbers to the left and right leg. 415 patients were examined clinically and legs were measured by three-dimensional laser measuring system. We calculated indices of claw toe and hallux valgus, the levels of indices, and differences in dimensions between left and right leg. Most survey participants had legs of different sizes (absolute difference in length of 3.05 2.75 mm of length less than one number). Deformation index values are between patients with clinically established deformity and those without statistically significant differences. Sensitivity of the method applied to investigate the distinctive profile by ensuring claw toe was 70.7%, hallux valgus 64.0%, specificity 73.5% and 79.4%. About half of diabetic patients have asymmetric and deformed legs. It would be reasonable to offer to the market footwear in a variety of length and width numbers to the left and right leg. Method for measuring the threedimensional laser sensor is useful for identifying lameness.
F.14 Improvements to existing production methods and tools or processes
COBISS.SI-ID: 12181019Three-dimensional (3D) measurements of the feet is crucial for the correct design and selection of shoes. Badly-fitting shoes are one of the major causes of pain, foot related diseases and injuries of the feet. This article presents a new system for 3D foot-shape measurements which is based on the laser-multiple-line-triangulation principle. The main part of a system is the measuring head comprising a three laser lines projection unit and two cameras, which rotate around the centre of the platform that the customer stands on, and measures both feet simultaneously. The developed software analyzes the different foot dimensions and suggests the most suitable model and size of a shoe from a database to the customer. Validation experiments have been presented to demonstrate the measuring precision of the system. The results show that the standard deviation for all feet dimensions is better than 0.6mm in case of test objects.
F.06 Development of a new product
COBISS.SI-ID: 13770267