In spite of all the sensors found on vehicles, a torque sensor is not one of them. “All OEMs today use torque sensors in their lab and instrumentation systems to develop products, but today, passenger cars and light trucks are not using torque sensing in serial production,” says Paul Cain, director of marketing — Transportation Products for Custom Sensors and Technologies Inc. “Engine control module engineers and transmission engineers are seeking a high accuracy torque technology in their assembly, but the price points of torque sensors have historically been too high.” A production-viable technology from BEI Duncan Electronics Div., called BEITORQ, could change this.
Using patented technology licensed from NCTEngineering GmbH, Pulsed Current Modulated Encoding (PCME) establishes a permanent magnetically encoded region inside an existing shaft, as long as the shaft is made from a ferro-magnetic material. Applying a mechanical force causes the shaft to radiate a magnetic field that is measured by the sensor. As the torque is increased on the shaft the magnetic field is also increased outside this encoded region. The coils then “read” this changing magnetic field. The sensor assembly is designed to reject unwanted external magnetic field signals, such as those from the earth’s magnetic field. The sensor operates in air, water and oil with only 5 mA current consumption, provides a high signal bandwidth of 10 kHz and accepts large alignment tolerances of 0.5 mm. With a temperature range up to 210C, ideal applications are automotive and industrial environments.
In vehicles, a torque sensor mounted at the crankshaft can monitor dynamic torque sensing on the engine as a primary sensor for next-generation engine control modules to optimize fuel economy and eliminate other sensors. Additionally, these torque sensors are under development in transmission applications in both the input and output shaft locations. To use it effectively, a torque sensor requires a different architecture in the control module. While it is not a trivial system design change, the benefits could offset the effort in a new engine or transmission management system. With the pressure for improved fuel economy and soaring gas prices, torque sensing could supply a means for improvement over accepted design methodology. Today, strong interest in diesel engines could provide one of the first applications.
Samsung's Galaxy line of smartphones used to fare quite well in the repairability department, but last year's flagship S5 model took a tumble, scoring a meh-inducing 5/10. Will the newly redesigned S6 lead us back into star-studded territory, or will we sink further into the depths of a repairability black hole?
In 2003, the world contained just over 500 million Internet-connected devices. By 2010, this figure had risen to 12.5 billion connected objects, almost six devices per individual with access to the Internet. Now, as we move into 2015, the number of connected 'things' is expected to reach 25 billion, ultimately edging toward 50 billion by the end of the decade.
NASA engineer Brian Trease studied abroad in Japan as a high school student and used to fold fast-food wrappers into cranes using origami techniques he learned in library books. Inspired by this, he began to imagine that origami could be applied to building spacecraft components, particularly solar panels that could one day send solar power from space to be used on earth.
Biomedical engineering is one of the fastest growing engineering fields; from medical devices and pharmaceuticals to more cutting-edge areas like tissue, genetic, and neural engineering, US biomedical engineers (BMEs) boast salaries nearly double the annual mean wage and have faster than average job growth.
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