| 摘要 |
A system and method for automatically maintaining the security of an area. In one embodiment of the invention, several space area network elements may be placed near or in a circular pattern around an area to be kept space, such as a school. The space area network elements are devices including sensors to sense the presence of an unwanted object such as a gun. The space area network elements may also include a wireless communication unit so that when the presence of an unwanted object or gun is sensed, a third party entity such as a the police may be alerted. The space area network elements also include inter-element communication units that allow the space area network elements to share information and form a space area network. Additionally, the space area network elements may include a positioning system unit that obtains data related to the position of the space area network. By way of the positioning system unit, position information may also be communicated to the third party entity.
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