Before microdevices can be developed into medical implants and other microscopic products, developers must first understand how friction, wear, and other forces operate on such a small scale. Bharat Bhushan, a professor of mechanical engineering at Ohio State University, is using an atomic force microscope to answer questions about wear and friction on such a small scale. Atomic force microscopes record the shapes of objects by dragging a tiny needle with a radius less than 100 nm across the surface of an object. Bhushan used the microscope on the surface of a micromotor's rotor and surrounding casing. He detected bumps between 11 and 100 nm that resulted from chemical process used to make the micromotor work for a biomedical application, and determined that the bumps on the rotor caused friction when they rubbed against the casing. When Bhushan tried lubricating the motor with a synthetic lubricant, the lubricant gummed up the tiny motor. But when they baked the motor and lubricant combination at 150C, the lubricant became a smooth layer hat allowed free movement.
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.
The age of touch could soon come to an end. From smartphones and smartwatches, to home devices, to in-car infotainment systems, touch is no longer the primary user interface. Technology market leaders are driving a migration from touch to voice as a user interface.
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.