These standards are selected by nature in the detection, identification and quantification of explosives. Making this decision not because of a single attribute, of explosives only allows the easy detection, identification and quantification. The US military has spent millions of dollars since World War II tum characteristic for it but to no avail. However explosives have many common attributes and unusual as follows:
(1) a higher density than the most common substances formed from the same elements and ranged from 1.2 to 1, 9 gm / cc;
(2) low density hydrogen component ranges between 0.1-5%;
(3) low carbon density in the range 0-10%
(4) high density nitrogen fluctuates approximately 10-40%;
(5) high oxygen density ranging from 30 to 65%; and
(6) other waste gases with steam pressure often can detect almost zero except dynamite, this percentage is very high. The lack of a single attribute, only to describe the explosives and the plethora of other physical properties often leads to a conclusion that the more unusual properties that a detection system can be measured more revenue increase the likelihood of success. To measure the density of the elements carbon, hydrogen and oxygen to a detection system capable of scanning a 3D container.
C.2.2. Detection capabilities of technology IGRIS
IGRIS available system capabilities can directly measure the amount of carbon, nitrogen
and oxygen present and conclude identify explosives or contraband. System Page 56 of 70 is also available as a 3-dimensional scanning device capable of scanning a container on the basis of the number of atoms to the number of elements for the detection of explosives is surrounded by inert gas. IGRIS system can determine within 10 or 20 seconds whether a substance exists in a container can be explosive and then determine conclude explosives in 1-5 minutes. c.2.3. The ability to detect the probe steam technology vapor detectors can only detect the substance has a high vapor pressure contained no dynamite. But nhirn, with all kinds of plastic explosives not have high vapor pressure, and may be covered by padded sealed firebox and remove all traces from the container. Vapor detectors not check inside the bag; machine measuring pressure only slightly outside pocket. Moreover, vapor detectors inability 3D scanning, which means that the machine considered as a unit container. This will make the determination of position in a small amount of explosives major container becomes more difficult. Thus, if you see it as a final test collection vapor detector not overcome this challenge. c.2.4. The ability to detect the X-ray technology - the ability to detect conventional X-ray technology: conventional X-ray scanners can only distinguish between elements of nguyrn high death (like iron and mercury) and low atomic number (such as carbon, nitrogen and oxygen). Thus the X-ray scanners can generate excellent images hunh of guns, knives and sometimes the detonator when the presence of low Z materials. However, the possibility of identifying explosives factory was one issues to consider, and the basic problem is the distinction exists between the explosives and the common plastic often used to conceal or disguise the explosives. Explosives are low Z materials as well as other common substances such as sugar, oil, food, clothing, etc. Machine scans using single radiographic X-ray energy, this ray which has no ability to distinguish between these substances. With this principle, X-ray scanner will treat all low Z materials is explosive, this means that all containers must be checked to identify explosives. Although this result may be the result errors Page 57 of 70
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