Generic User Manual for Maintenance of Mountain Bike Brakes Based on Augmented Reality

New smartphones generation provided with webcams, tactile screen and internet connection allow adaptation of new technologies and computer applications to this kind of devices. Augmented reality technology becomes widespread and more used each time by everyone. Augmented reality (AR) seeks creating virtual objects in user interface which superimpose over the physical environment. Equipment maintenance as well as training tasks are both excellent fields for developing augmented reality applications, in fact, several apps of Augmented Reality have been performed in very specific systems and complex (aircrafts, military equipment ...)

In this paper our aim is making this technology approachable for applications and tasks quite common to everybody, so two prototypes have been developed : one smartphones-based mobile AR system and another video see-through based AR system which will guide the user step by step through installation of the V-brakes system, change of cartridge shoes and adjustment of tension cable. An easy interface based of several cards containing markers with codified sequences based in 3D models for performing maintenance, is fitted to the bike handlebars. Usability study results illustrate the feasibility of the prototype in both versions considering use of the smartphone for domestic and user tasks meanwhile virtual glasses are advised for more complex maintenance which may require use of both hands.