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Millimeter Wave Imaging Systems
Identifies Dangerous Materials that Metal Detectors does not Detects
Identifies Hidden Guns, Explosives and Drugs on the Human Body
Concealed object detection is one of the greatest challenges facing security operations today. To detect concealed objects requires more than metal
detectors in today‘s environment. There must be reliable ways to detect and identify non-metallic items or other threatening objects that may be concealed
under clothing. Millimeter wave (MMW) frequencies readily penetrate clothing, thus allowing the detection of hidden objects.
MMW Imaging System was developed based on its ultra-sensitive, patented, XRS-090Wband
32-pixel passive sensor. The system incorporates a safe, sensing technology with automatic
target detection capability. This system will quickly detect concealed objects and contraband,
including plastics, liquids, paper and other types of material. The passive millimeter
-wave system rapidly scans people, sending detected signals into high-speed processor that
overlays an icon over a video image of the subject in real time. It can be used in a variety of
security scanning applications, such as airports, court houses, federal buildings, prisons,
schools, sporting events, mass transit systems, and military checkpoints. The system can also
be used for loss prevention and deterrence in commercial applications, such as retail outlets,
fulfillments centers, warehousing and distribution centers.
ZXY-WAVTECH
Detects the following
Cemtex Explosives
TNT Explosives
Drugs
Liquid Nitro Glycerin Explosives
The New Ceramic Guns
The New Ceramic Knives
Cocaine Powder Drugs
Cash Money
Technology Smuggling, PCB Boards/CDs
D e t e c t i n g . . .
Explosives Liquid explosives Metallic objects Thick Paper Currency Bundle
Whether the concealed object is plastic, liquid, metal or paper, the MMW detection system will detect it
and pinpoint its location on the subject. No active or harmful radiation is needed. People screening can
either be non-intrusive or cooperative.
All natural and man-made objects emit and reflect different
levels of electromagnetic energy at various wavelengths.
The MMW detection system relies on contrast between the concealed
objects and the body for detection. The two main factors
influencing the contrast and the temperature differential and
difference in material composition. All natural and man-made
objects emit, and reflect different levels of electromagnetic
energy at various wavelengths. The energy emitted or reflected
at any particular frequency is determined by the material properties
of the objects. Materials such as clothing, have a moderately
high radio frequency transparency, which leads to effective
electromagnetic wave penetration. In contrast, human skin,
plastics and metals are good electromagnetic wave insulators
The material property of interest to MMW imaging is emissivity. Emissivity is a
measure of how strongly a body radiates at a given frequency. A high emissivity
indicates an object that absorbs and radiates a large proportion of the incident energy.
A low emissivity indicates an object that only absorbs and radiates a small
amount of the incident energy. In practical cases of most interest, a low emissivity
corresponds also to target material that will reflect most of its incident MMW energy.
The majority of natural objects are selective radiators – their emissive is wavelength
dependent.
Probability of detection and false alarm are perhaps the most important set parameters
to specify. The inherent trade-off between the two varied by application. The
adjacent figure shows typical probability of detection versus signal-to-noise ratio at
different levels of false alarm rates for a plastic target against a human body.
Target
Secondary
Reflector
13:04:55
Sensor
Camera
Much like an optical system detects the
visible energy and an IR system detects
the thermal energy, a millimeter wave
(MMW) system detects the energy at
MMW frequencies.
Primary
Reflector
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