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The natural locomotion interface is critical to the development of many VRapplications. For household VR applications, there are two basic requirements:natural immersive experience and minimized space occupation. The existinglocomotion strategies generally do not simultaneously satisfy these tworequirements well. This paper presents a novel omnidirectional treadmill (ODT)system, named Hex-Core-MK1 (HCMK1). By implementing two kinds of mirrorsymmetrical spiral rollers to generate the omnidirectional velocity field, thisproposed system is capable of providing real walking experiences with afull-degree of freedom in an area as small as 1.76 m^2, while delivering greatadvantages over several existing ODT systems in terms of weight, volume,latency and dynamic performance. Compared with the sizes of Infinadeck and HCP,the two best motor-driven ODTs so far, the 8 cm height of HCMK1 is only 20% ofInfinadeck and 50% of HCP. In addition, HCMK1 is a lightweight device weighingonly 110 kg, which provides possibilities of further expanding VR scenarios,such as terrain simulation. The latency of HCMK1 is only 23ms. The experimentsshow that HCMK1 can deliver on a starting acceleration of 16.00 m/s^2 and abraking acceleration of 30.00 m/s^2.

Strolling in Room-Scale VR: Hex-Core-MK1 Omnidirectional Treadmill