| 摘要 |
The present invention describes a method and apparatus that prevents a body from crossing a virtual barrier. Satellite signals provide the definition of the region and the location of the body within the region. In addition, signaling means can be incorporated into the apparatus to enable the user to give commands to the body, to reinforce those commands through stimuli, to transmit bidirectional location signals, and to interface with the user through visual and audible displays. The apparatus includes: a GPS module, a microcomputer, key switches, a display, audible indicator, and a battery. The activation of the key switches can store the location of the vertices of the region, the location of the body, test and command of the stimuli, activate visual and audible displays, and automatically track the body's movement. The apparatus can be set to signal and stimulate the body to deter it from crossing the virtual barrier.
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