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Method and apparatus for detecting explosive particles in a gas stream

A technology for explosives and granules, which is used in measuring devices, sampling devices, preparation of samples for testing, etc., and can solve problems such as inability to detect

Inactive Publication Date: 2016-06-15
SPHEREA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage here is that only the larger particles remain in the adsorption net and the smaller particles pass through and thus cannot contribute to the detection

Method used

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  • Method and apparatus for detecting explosive particles in a gas stream
  • Method and apparatus for detecting explosive particles in a gas stream
  • Method and apparatus for detecting explosive particles in a gas stream

Examples

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Embodiment Construction

[0021] exist figure 1 A first embodiment of a detection device 10 a is schematically shown in , which essentially consists of a microfilter 12 , a detector 14 and a suction pump 16 . Furthermore, an object 20 contaminated with explosive particles 18 is shown schematically, through which an air flow 22 is guided, which flows through the microfilter 12 and on to the detector 14 . Explosive particles 18 , which are shown greatly enlarged in the drawing, adhere to microfilter 12 because they cannot pass through microfilter 12 due to the selected pore size which is smaller than the size of explosive particles 18 . After a certain time, preferably approximately 10 to 20 s, enough explosive particles 18 have accumulated on microfilter 12 that microfilter 12 is heated to a temperature of preferably approximately 150 to 250° C. by means of heating device 24 . Due to the increased temperature, the explosive particles 18 are desorbed from the microfilter 12 and are converted into a gase...

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Abstract

In a method and apparatus for detecting explosive particles in a gas flow (46), the gas flow (46) is directed over a defined period of time through an adsorption mesh (12), wherein the explosive particles (18) are adsorbed to Thereon, the adsorption net (12) is subsequently heated to a heating temperature at which the explosive particles (18) are desorbed, and the gas flow with the desorbed explosive particles is conveyed to a detector (40) for its detection , wherein a microfilter (12) with a smaller pore size than the particle size of the explosive particles (18) is used as the adsorption net. This makes it possible to collect virtually all explosive particles ( 18 ) present in the gas flow ( 46 ) and feed them to the subsequent detection, thereby increasing the sensitivity of the detection.

Description

technical field [0001] The invention relates to a method and a device for detecting explosive particles (Sprengstoffpartikel) in a gas flow, wherein the gas flow is guided through an adsorption net (Adsorptions netz) over a defined period of time, so that the explosive particles are adsorbed thereon, followed by The sorption mesh is heated to a heating temperature at which the explosive particles are desorbed, and the gas flow with the accumulated explosive particles is fed to a detector for its detection. Background technique [0002] A detection method or detection device is known from document US6604406B1. [0003] The increasing use of explosives for terrorist purposes, in particular in civil air traffic, creates an urgent need for effective explosives detectors, wherein in particular mobile or field-suitable (feldtauglich) systems are required. For example, when potential terrorists handle explosives, small explosive traces (sprengstoffspur) remain on clothing and skin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/22
CPCG01N1/2205G01N1/2214G01N1/40G01N1/405G01N2001/022G01N1/4005G01N33/0057
Inventor S.比尔T.齐曼A.弗里德贝格尔
Owner SPHEREA
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