Patent ID: 6621414
Filing Date: 2003-09-16
Classification: G01N,G07C

Abstract:
A system for controlling coming and going personnel at a facility comprising:a control area provided between outside and inside of the facility; a person identification detector provided in said control area for identifying a personal identification means of a coming person; and a mass spectrometer provided in said control area for ionizing air by a discharging device and detecting the ionized air as a molecular weight, said mass spectrometer detecting the air in said control area, wherein said detected personal identification and said detected molecular weight are input into a control processor to check against personal identification and molecular weights of dangerous substance, both of which have been registered previously into said control processor, in order to detect the molecular weight of dangerous substances in the air and the personal identification matching with the previously registered personal identification; wherein a danger signal is generated when a dangerous substance is detected in the air and an identification signal is generated when the detected personal identification is matched with the previously registered personal identification, and the coming person is allowed to enter into the facility when no danger signal exists and an identification signal exists.