Condition monitoring of rotating machinery with MEMS wireless vibration sensing

June 05, 2013 // By Paul Buckley
Analog Devices has introduced a wireless vibration sensing system that allows industrial systems operators to remotely monitor production equipment health, improve system performance and reduce maintenance costs.

The networked system includes the ADIS16229 iSensor wireless vibration sensor node, which combines dual-axis digital MEMs (micro-electro mechanical systems) acceleration sensing with advanced frequency-domain and time-domain signal processing. The sensing system also includes the ADIS16000 gateway node, which supports up to six ADIS16229 sensors at one time using a proprietary wireless protocol, managed through an SPI interface compatible with most embedded processor platforms. The wireless function enables the remote monitoring of equipment in hard to reach or dangerous locations, while the vibration sensing and detection node is easy to install into existing infrastructure and allows continual monitoring that can be used to evaluate equipment performance and schedule predictive maintenance.
“The primary driver of predictive maintenance is the reduction of factory system downtime, which currently relies on periodic off-line performance trend analysis,” said Bob Scannell, iSensor business development manager, MEMS/Sensors Group, Analog Devices. “With MEMS-based vibration sensors that continuously monitor machine tools, turbines, pumps, conveyors, compressors, engines and other equipment, factory operators receive real-time statistical performance data and process control feedback that allow them to prevent costly system shut-downs.”
The ADIS16229 is a complete sensor node featuring a MEMs vibration sensor, an RF transceiver and embedded frequency and time domain signal processing. The device captures shifts in equipment performance through direct analysis and reporting of the frequency-domain signature using a 512-point, real-valued FFT (fast Fourier transform), FFT magnitude averaging and programmable spectral alarms. An FFT record storage system offers users the ability to track changes over time and capture FFTs with multiple decimation filter settings.
The ADIS16000 gateway node wirelessly connects with up to six sensor nodes, and then interfaces with most embedded processor platforms, through a standard SPI interface.  
The ADIS16229 iSensor wireless vibration sensor node is priced at $189.00, and the ADIS16000 at $139.00 (1,000).
Analog Devices,