| 摘要 |
<p>The invention relates to a detection gate (100) for detecting substances carried by an individual (108) or an object, the detection gate (100) comprising: two lateral uprights (102, 104) facing one another and defining a passage (106) therebetween for said individual (108) or said object, blowing means (110) installed in a blowing chamber (122) which one of the uprights (102) comprises, and which are adapted to exhaust the air contained in said blowing chamber (122) towards the other upright (104), exhaust means (118) installed in an exhaust chamber (124) which the other upright comprises (104), which are suitable for exhausting the air thus blown, a detection device (120) arranged upstream from the passage (106) and adapted to detect the presence of said substances in the air thus blown, and a transfer line (126) which, via one of the ends thereof, leads into the blowing chamber (122) and, via the other end thereof, into the exhaust chamber (124), the blowing means (110) and the exhaust means (118) being such that a single volume of air has time to pass through the passage (106) at least twice during the time that said individual (108) or said object is present in said passage (106).</p> |
