MEMS sensor provides early detection of motor-bearing irregularities
By Margery Conner, Technical Editor -- EDN, May 7, 2008
Vibration analysis can serve as the proverbial ounce of prevention for factory equipment, in which unscheduled downtime can be prohibitively expensive. Targeting that prevention, Analog Devices’ ADXL001 industrial vibration and shock sensor allows designers of industrial equipment or instrumentation to cost-effectively incorporate continuous, high-performance, high-bandwidth vibration monitoring into their designs. The single-chip, 5×5-mm iMEMS (integrated microelectromechanical-system) package fits into motor-control circuitry or mounts on factory equipment for instrumentation. The chip comes in three full-scale dynamic ranges of ±70, ±250, and ±500g with a 22-kHz resonant frequency and a frequency response down to dc, and nonlinearity of 0.2% of full-scale range.
Like other members of the company’s iMEMS motion-signal-processing technology, the chip requires no calibration and works with Analog’s SigmaDSP processor and SigmaStudio graphical user interface. It has an extended industrial- temperature range of −40 to +125°C. Input voltage is 3.3 to 5V. The ADXL001 sells for $35 (1000) and comes in an eight-pin LCC ceramic package.
