Explosive detection system
First Claim
1. An explosive detection system, comprising:
- a sampling orifice that receives sampled gas;
a fluid rotator that creates a cyclonic gas flow beyond the sampling orifice;
an ion source, coupled to the sampling orifice, that generates ions corresponding to the sampled gas;
a drift tube having the ion source coupled to a first end thereof; and
a detector coupled to an other end of the drift tube, wherein the detector detects in the sampled gas the presence of ions associated with explosives.
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Abstract
An explosive detection system detects the presence of trace molecules in air. The sensitivity of such instruments is dependent on the concentration of target gas in the sample. The sampling efficiency can be greatly improved when the target object is warmed, even by only a few degrees. A directed emission of photons, typically infrared or visible light, can be used to significantly enhance vapor emission. The sensitivity of such instruments is also dependent on the method of gas sampling utilized. A cyclone sampling nozzle can greatly improve the sampling efficiency, particularly when the sampling needs to be performed at a distance from the air intake.
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Citations
23 Claims
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1. An explosive detection system, comprising:
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a sampling orifice that receives sampled gas;
a fluid rotator that creates a cyclonic gas flow beyond the sampling orifice;
an ion source, coupled to the sampling orifice, that generates ions corresponding to the sampled gas;
a drift tube having the ion source coupled to a first end thereof; and
a detector coupled to an other end of the drift tube, wherein the detector detects in the sampled gas the presence of ions associated with explosives. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An explosive detection system, comprising:
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a sampling inlet that receives sampled gas;
a heat source, mounted proximal to the gas sampling inlet, the heat source providing photonic emissions to one side of a target proximal to the sampling inlet;
an ion source, coupled to the sampling orifice, that generates ions corresponding to the sampled gas;
a drift tube having the ion source coupled to a first end thereof; and
a detector coupled to an other end of the drift tube, wherein the detector detects in the sampled gas the presence of ions associated with explosives. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification