초록 ▼

A detection gate for detecting substances carried by an individual or an object, has two lateral uprights facing one another and defining a passage there between for the individual or the object, a blowing device installed in a blowing chamber in one of the uprights which are adapted to exhaust the

A detection gate for detecting substances carried by an individual or an object, has two lateral uprights facing one another and defining a passage there between for the individual or the object, a blowing device installed in a blowing chamber in one of the uprights which are adapted to exhaust the air contained in the blowing chamber towards the other upright, an exhaust device installed in an exhaust chamber in the other upright, which are suitable for exhausting the air thus blown, a detection device arranged upstream from the passage and adapted to detect the presence of the substances in the air thus blown, and a transfer line which, via one of the ends thereof, leads into the blowing chamber and, via the other end thereof, into the exhaust chamber, the blowing device and the exhaust device being such that a single volume of air has time to pass through the passage at least twice during the time that individual or the object is present in the passage.

대표청구항 ▼

1. Detection gate intended to detect substances carried by an individual or an object, the detection gate comprising: two lateral uprights facing each other and defining there between them a passage for said individual or said object,a blowing chamber realized in one of the lateral uprights, emergin

1. Detection gate intended to detect substances carried by an individual or an object, the detection gate comprising: two lateral uprights facing each other and defining there between them a passage for said individual or said object,a blowing chamber realized in one of the lateral uprights, emerging in the passage through only one first ventilated wall through which air in the blowing chamber is blown and comprising blowing means;an exhaust chamber realized in the other lateral upright, emerging in the passage through only one second ventilated wall through which the air in the passage is sucked and comprising exhaust means able to suck in the air through said second ventilated wall, the second ventilated wall facing the first ventilated wall,a detection device disposed downstream from the passage and able to detect the presence of said substances in the air thus blown,a transfer pipe emerging through a first end in the blowing chamber and through a second end in the exhaust chamber,the blowing means being adapted to blow the air contained in said blowing chamber through said first ventilated wall directly towards said second ventilated wall and then through the transfer pipe,the blowing means and the exhaust means being such that a same volume of unfiltered air is recirculated across the passage at least twice before said individual or said object passes through said passage; andthe transfer pipe has a discharge flap configured to move from a closed position to an open position after a detection of a substance by the detection device. 2. Detection gate according to claim 1, wherein the blowing means comprise a plurality of fans distributed over a height of the one upright. 3. Detection gate according to claim 2, wherein at least one of the fans is placed opposite an area where the feet of the individual pass. 4. Detection gate according to claim 1, further comprising a sterilization device intended to sterilize the air flow circulating between the exhaust means and the blowing means. 5. Detection gate according to claim 1, further comprising a holding device intended to prevent the individual leaving said detection gate. 6. Method for detecting substances carried by an individual or an object, and implemented by means of a detection gate according to claim 1, said detection method comprising: a blowing step during which a volume of air in a blowing chamber is blown by blowing means towards the exhaust means,an exhaust step during which said volume of air thus blown is exhausted by the exhaust means in an exhaust chamber,a detection step during which a detection device detects whether at least one of the substances is present in said volume of air thus blown,a purging step during which a discharge flap moves from a closed position to an open position after a detection of a substance by the detection device,a transfer step during which the air in the exhaust chamber is transferred to the blowing chamber through the transfer pipe, anda step of looping back onto the blowing step, wherein the blowing means and the exhaust means are such that the same volume of unfiltered, non-decontaminated air makes the blowing step and exhaust step twice before said individual or said object passes through said passage. 7. Detection method according to claim 6, wherein, when the detection gate comprises a sterilization device, the detection method comprises a sterilization step between the detection step and the blowing step.