EXPLOSIVE DETECTION SYSTEM

摘要

PROBLEM TO BE SOLVED: To suppress the occurrence of a contamination due to ionization. SOLUTION: When a door 14 of an entrance and exit control gate 12 is opened and an area entering person 10 enters the room of the entrance and exit control gate 12, the power for corona discharge in an explosive detection device 18 is turned on for a certain period according to a door open-close signal output corresponding to an open/close motion of the door. A gas sample including matters adhered to the person 10 is sent to the explosive detection device 18 through a suction part 20 and a gas sample lead-in tube 22, and ionized. The ionized gas sample is analyzed by an analyzer 28c. A data processor judges whether an explosive is included in the gas sample or not based on the analysis result. If an explosive is included, the door 14 is closed and the person 10 is constrained. If no explosive is detected, an exit door is opened to allow the person 10 to pass through and the power for corona discharge is turned off. COPYRIGHT: (C)2004,JPO