Method for controlling coming and going personnel, and a...

Details Method for controlling coming and going personnel, and a... Method for controlling coming and going personnel, and a...

2005-12-13

2005-12-13

Trieu, Van T. (Department: 2636)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S540000, C340S545200

Reexamination Certificate

active

06975227

ABSTRACT:
A coming and going personnel control system having a high security level by prohibiting a coming person who has dealt with a dangerous substance from entering a facility through a control area is disclosed. Whether a person coming into the control area carries a dangerous substance such as explosive material with him or has dealt with such dangerous substance can be checked by the steps of: ionizing air which has been contacted with the person coming into a control area by a discharging device; the ionized air is detected by a mass spectrometer as a molecular weight; the molecular weight is input into a control processor; and if the detected molecular weight is matched with a molecular weight of dangerous substance which have been registered previously into the control processor, the door in a direction forward to the coming person is closed.

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patent: 4586441 (1986-05-01), Zekich
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patent: 0 458 622 (1991-11-01), None
patent: 11-352032 (1999-12-01), None
patent: WO 00/23958 (2000-04-01), None

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