Development and Evaluation of a Grip Strength Reflection System based on SEMG of the Flexor Digitorum Profundus for Sensory VR Interaction

In virtual reality (VR), the factor that can maximize user immersion is to develop an intuitive and sensory interaction method. Physical devices such as controllers or data gloves of existing VR devices are used to control the movement intentions of the user, but their shortfall is that the grip strength or detailed muscle strength cannot be reflected. Therefore, this study intends to establish a more sensory VR environment compared to existing methods by reflecting the grip strength, that is, the flexor dig- itorum profundus, of the user in the VR content. In the experiment, the muscle activity of the flexor digitorum profundus based on surface electromyography was obtained from six subjects, and four ob- jects with differing intensity were created within VR, whereby the objects were made to be destroyed depending on muscle activity. As a result, satisfaction was improved because the user could sensibly interact with the object inside VR and the intended motion control of the user was reflected on the VR content.