太赫兹成像技术在邮局包裹检测中的应用

Several industrial inspection techniques like X-ray scanning and microwave detection have been successfully used in various security
applications over the last few decades. For instance, until recently X-ray scanning dominated nondestructive testing (NDT) methods
in security screening applications. However, the hazards of ionization radiation combined with relatively high costs have limited
widespread use of X-ray scanners in many applications where human health must not be jeopardized.
The postal industry is no exception. Unmediated on-the-spot inspections by postal inspectors remain the most common and effective
way to check parcels and envelopes. Quite often such inspection is carried out manually without any modern, automated
equipment or computer-aided support.
TeraSense Group, Inc has developed a brand-new solution for improving the safety at postal offices and eliminating health hazards
for clients and postal workers. We offer the Terahertz High-Speed Imaging Scanner, which is based on our key innovative
component: our Ultrafast Terahertz Imaging Camera with image acquisition rates up to 5,000 lines per second. Thanks to its highly
sensitive sensor array, we can now bring health and safety measurements in the postal industry to a new level.
TeraSense THz scanners have relatively low costs and offer extremely high operating speeds compared with X-ray and microwave
techniques. That makes Terahertz waves a suitable and effective security screening solution for use in the postal industry.
KEY SPECIFICATIONS
TERAHERTZ IMAGINGFOR MAIL AND PARCEL SCREENING
ADVANTAGES OF THE THz IMAGING SYSTEM
• Powerful tool for prevention of terrorist attacks
• Effective tool for revealing drug traffickers
• Ability to detect undeclared items in a parcel or envelope
• Extremely high throughput capacity due to high imaging speeds
• Nondestructive and hazard-free inspection
• Low-cost solution
THz IMAGING CAMERA
• Operating frequency: 100 GHz
• Image acquisition rate: up to 5000 lines per second
• Number of pixels (scalable): 256 x 1
• Field of view (coverage area): 384 x 3 mm2
• Pixel size: 1.5 x 3 mm
• Spatial resolution: 3 mm
• Fits conveyor belt running speed up to 15 m/s
• Original software: TeraFast®Viewer
• Interface: mini-USB
• Power supply: 24V/20W
THz SOURCE:
• Operating frequency: 100 GHz
• Power per pixel: 140 µW
• Reflection beam-forming optics
• Protective isolator for enhanced stability
Hight Speed Linear
Terahertz Scanner
with Type II THz Source
System set upAnother important application of the Terahertz Scanner is the detection of items that terrorists might send by mail, for example:
Traffickers deliver drugs using ordinary mail services, and they often get away with it. Such “supply chains” may stay unrevealed
for years because security inspection in postal facilities is performed manually and relies on the professionalism of postal
inspectors. Unfortunately, manual inspection is often not enough.
This situation can be changed entirely thanks to our Terahertz High-Speed Imaging Scanner — our new security screening system
for postal offices. Now it is possible to check envelopes and parcels at industrial conveyor rates (up to 15m/s) and detect substances
like the ones listed below:
• Marijuana and similar plants
• Cocaine
• Liquid substances
Postal inspectors can detect such items in real
time and on the spot while the conveyor belt
is running. It works even if the amount of drugs
in a parcel is just a few grams.
It is essential that our scanner can detect various
types of items inside parcels and envelopes
without disturbing their integrity.
It is important for postal inspectors to check if the content of the parcel matches the customs declaration. Our Terahertz Scanner
is an optimal solution for this application. Terahertz waves are harmless not only to the human body but also to technology.
This property will safely allow postal staff to ignore warning labels like “Caution, do not X-ray” and check such parcels like any others.
The Terahertz High-Speed Imaging Scanner can be deployed in minutes and does not require any special qualifications to operate.
In addition, our scanner is estimated to be cheaper than existing solutions on the market.
THz images of sachets of tobacco (5 g, 3 g, 1 g) in envelopes
5 g 3 g 1 g
A dummy bomb in a box
THz image of a sachet
of flour in an envelope
DETECTION OF UNDECLARED ITEMS
• Explosives and their components
• Poison
• Biological weapons (anthrax and others)
TERRORISM PREVENTION
MAIL SCREENING FOR DRUG DETECTION
A sachet of tobacco (3 g)
A sachet of flour
Some of the most suitable applications of TeraSense THz scanners are listed below.
THz image of a dummy bomb
in a box