Target detection portal
This invention relates to the field of detection apparatus, particularly for controlled or dangerous substances, and more particularly to chemical and explosive detection apparatus for screening persons or objects for the presence of trace amounts of target substances. A portal apparatus for screeni...
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| Main Authors | , |
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| Format | Patent |
| Language | English |
| Published |
01.01.2002
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| Online Access | Get full text |
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| Summary: | This invention relates to the field of detection apparatus, particularly for controlled or dangerous substances, and more particularly to chemical and explosive detection apparatus for screening persons or objects for the presence of trace amounts of target substances.
A portal apparatus for screening persons or objects for the presence of trace amounts of target substances such as explosives, narcotics, radioactive materials, and certain chemical materials. The portal apparatus can have a one-sided exhaust for an exhaust stream, an interior wall configuration with a concave-shape across a horizontal cross-section for each of two facing sides to result in improved airflow and reduced washout relative to a configuration with substantially flat parallel sides; air curtains to reduce washout; ionizing sprays to collect particles bound by static forces, as well as gas jet nozzles to dislodge particles bound by adhesion to the screened person or object. The portal apparatus can be included in a detection system with a preconcentrator and a detector. |
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