Accelerometers for aerospace, automotive and industrial monitoring

January 07, 2014 // By Graham Prophet
Silicon Designs Inc., maker of rugged industrial-grade MEMS variable capacitive (MEMS VC) accelerometer chips, modules and supporting data acquisition, has added the compact, low-mass Model 2220 Series to its offerings.

The single-axis SDI Model 2220 is a higher-performance version of the company's Model 2210, combining an integrated low-noise, nitrogen-damped, fully-calibrated MEMS VC accelerometer chip with high-drive, low-impedance buffering, each contained in an epoxy-sealed rugged anodised aluminium housing that mounts via two M3 screws. This design is suitable for measuring acceleration within industrial and commercial environments, where low mass (10g) and small size (1 x 0.5 x 0.44 in.) help to minimise mass loading effects. Available in seven models, with measurement ranges from ±2g to ±200g and a wide frequency response, the SDI Model 2220 series responds to both DC and AC acceleration, with either two analogue ±4V (differential); or 0.5 to 4.5V (single-ended) outputs that vary with acceleration. At zero acceleration, output differential voltage is nominally 0VDC (DC response). Differential sensitivity ranges are from 2000 mV/g for the ±2g module; to 20 mV/g for the ±2000g module, with typical 1% cross-axis sensitivity. Onboard voltage regulation also minimises supply voltage variation effects. SDI Model 2220 series modules can withstand shock inputs of up to 2000g and can reliably operate over a temperature range of –55°C to +125°C. Each module is serialised for traceability and is fully calibrated.

The combined low mass, small size, and low-impedance outputs of SDI Model 2220 make the series particularly ideal for flight test, aircraft flutter testing, vibration monitoring and analysis, robotics, biomechanics, automotive RLDA, machinery and equipment control, modal analysis, crash testing, and general in-laboratory applications.

Silicon Designs; www.silicondesigns.com