Although hand tracking can achieve hand interaction in VR, it is difficult to achieve tactile feedback. Recently, researchers at the University of California have developed a haptic feedback prototype glove that may help people feel objects in VR.
Haptic feedback is the realization of tactile feedback by converting the pressure generated when people push/contact objects into feedback information. It is part of the haptic domain and is designed to help people understand the world through touch.
VR gloves are based on software robot technology, feedback and simulation of the pressure felt by people's fingers. This is very important for adding more perceptions and more realistic technologies to future VR space exploration.
Jurgen Schulze, an adjunct professor of computer science at virtual reality at the University of California, San Diego, said: "When people think of tactile, they usually think of a hump pad or a vibration controller, just like when your phone vibrates, it can give you a sense of touch. With gloves, you can do a lot of things, such as grabbing things in VR and carrying them at all times, or at least letting people think that these objects are there.Although these virtual objects still have no weight, at least they have volume. This is the first step, and the second step is vibration feedback."
The team covered an aerated "muscle" on the back of the glove. When the finger is in motion, it will exert pressure on the air cushion through the muscle movement of the back of the hand so that the directional pressure of the finger can be known. The air cushion is covered by woven fibers and the water pump controls the degree of expansion. The device is tied to a soft silicone bone that can be worn on the back of the hand. Based on the data reading of the opponent's position, the device can track the user's hand movements and hand pressure.
After the user wears the heads-up and gloves, the user can see a virtual piano. When the user presses the key, the airbag of the glove will swell, which simulates the touch and pulls back your finger. According to the user of the test, the glove's experience was "intoxicated," but the user also noticed a feedback delay in the glove.
Currently, the prototype is only suitable for piano applications and can only be applied when the tracking device can “see†hands. Mike Tolley, a professor of engineering at the University of California who taught postgraduate software robot design systems, said: "In the future, the gloves will also integrate sensors so that the relative position of the gloves can be read and the accuracy of the gloves can be improved. For example, a hand is The front of the other hand."
Tolley and Schulze conceived that the gloves could be used in games and virtual training, but they also saw the potential for robotic surgery. The most important part of robot assistance is feedback. The most popular surgery-assisted robot at the moment is DaVinci, but it only provides visual feedback but does not provide tactile feedback.
To build a robot that can provide mechanical feedback, it must be able to feel the pressure exerted on it. This type of equipment is usually very expensive and does not reach the medical grade. So it is still difficult to say what kind of mechanical feedback will appear on the surgical assistant robot. However, Kazanzides admitted that it is still useful.
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