Game Development Reference
In-Depth Information
Figure 7.6 CyberGlove glove of Virtual Technologies. (Illustration: Immersion S.A., with permission)
finger movements with the help of a calibration procedure. PowerGlove, which is no
longer manufactured, used this system.
The strain gauge gloves require thin gauges covered in a flexible elastic mate-
rial (Nylon and Lycra-based). This type of glove is definitely more efficient, but also
more expensive. The measurements are coded on eight bits and are transmitted at the
frequency of 100 Hz. The resolution is as per the degrees (Figure 7.6).
The Immersion Corporation company offers CyberGlove with several options,
(CyberTouch tactile feedback and CyberGrasp force feedback, which are presented in
the chapter dealing with manual sensorimotor interfaces). The glove is made up of
a nylon (80%)/lycra (20%) mix, which makes it very flexible. As the glove does not
cover the fingertips, the user can freely type on a keyboard, for example, with the
same level of dexterity as without a glove. The operating principle of the CyberGlove
is based on 18 or 22 angular measurement sensors placed in the glove (particularly
three per finger and thumb abduction). The characteristics are as follows:
measurement frequency is approx. 100Hz; latency is 5ms for 18 sensors; weight
is 85 g. There is a wireless version called CyberGlove II Wireless.
7.2.4 Hall effect gloves
The Dextrous Hand Master of the Sarcos company has a metal structure (exoskeleton)
worn on the back of the hand. It has four position sensors per finger, and thus twenty
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