Researchers at Pacific Northwest National Laboratory (PNNL) are helping customs agents and other law enforcement officials get a peek inside sealed containers. The laboratory's Acoustical Inspection Device (AID) enables identification of sealed compartments that may contain explosives, illegal drugs, or other types of contraband. The device also allows users to find liquids in sealed containers and measure the level of liquid inside. PNNL's Aaron Diaz, a physicist, says that as it's currently configured, the AID uses ultrasound for detecting pockets and voids in metal containers, gas tanks, and other receptacles in which someone could hide a weapon of mass destruction or kilo of cocaine. The device's sensors transmit ultrasonic pulses and detect return echoes that have bounced off the side of the container. The features and unique characteristics of the return echoes are then compared with a library of material characteristics. "It's all based on a material's properties and the signature we read and compare with the device's onboard database," says Diaz. "It's so sensitive that we can tell the difference between Classic Coca-Cola and Diet Coke." The damping characteristics of wood and other porous materials pose a limitation today, but Diaz says that adjustments could be made in the future. He points out that the Mehl, Griffin, and Bartek Company in Arlington, VA is currently commercializing AID for U.S. Customs agents. A similar version of the device is developed for use along borders in Eastern Europe. For more information, go to www.pnl.gov.
The engineers and inventors of the post WWII period turned their attention to advancements in electronics, communication, and entertainment. Breakthrough inventions range from LEGOs and computer gaming to the integrated circuit and Ethernet -- a range of advancements that have little in common except they changed our lives.
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Soft starter technology has become a way to mitigate startup stressors by moderating a motor’s voltage supply during the machine start-up phase, slowly ramping it up and effectively adjusting the machine’s load behavior to protect mechanical components.
A new report from the National Institute of Standards and Technology (NIST) makes a start on developing control schemes, process measurements, and modeling and simulation methods for powder bed fusion additive manufacturing.
If you’re developing a product with lots of sensors and no access to the power grid, then you’ll want to take note of a Design News Continuing Education Center class, “Designing Low Power Systems Using Battery and Energy Harvesting Energy Sources."
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.