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    • 5. 发明授权
    • Portable personal electronic perimeter alarm
    • 便携式个人电子周边报警器
    • US4998093A
    • 1991-03-05
    • US285767
    • 1988-12-16
    • John J. Benoit
    • John J. Benoit
    • G08B13/183G08G1/04
    • G08G1/04G08B13/183
    • An extremely reliable, easily portable perimeter alarm system. It is comprised of a light beam controlled radio transmitter and personal warning devices capable of individually warning preoccupied highway workers of the imminent danger present when an errant vehicle violates the established perimeter of a work site. This warning will allow the workers to take evasive action and potentially avoid injury and/or death. It is also the object of this invention to allow for an extremely reliable, easily portable perimeter penetration alarm system that can be utilized in other appropriate settings by security guards, military personnel, etc., and which would provide for confidential notification to such personnel that a temporarily established portable perimeter line had been violated.
    • 一个非常可靠,便于携带的周边报警系统。 它包括一个光束控制的无线电发射机和个人警告装置,能够单独地警告高速公路工作人员出现即将发生的危险,当违规车辆违反工地的既定周边时。 这个警告将允许工人采取回避行动,并可能避免伤害和/或死亡。 本发明的另一个目的是允许一种非常可靠,便于携带的周边穿透报警系统,其可由安全卫士,军事人员等在其他适当的设置中使用,并且将提供对这些人员的机密通知, 一个临时建立的便携式外围线已被侵犯。