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Tri-axis vibration sensor enables easy factory maintenance

analogadis16223Norwood, Mass. — Analog Devices, Inc. has developed a tri-axis, wide-bandwidth, embedded vibration sensor that enables simple and affordable manufacturing equipment condition monitoring. Touted as the industry’s first fully programmable embedded tri-axis MEMS vibration sensor, the ADIS16223 iSensor accelerometer also claims a smaller, more integrated, and lower cost design.

Featuring the capabilities and programmability of larger “brick level” solutions for industrial equipment vibration monitoring, the ADIS16223 combines ADI’s iMEMS technology with signal processing, data capture, and a serial peripheral interface (SPI). The SPI and data buffer structure provide access to wide-bandwidth sensor data. The 22-kHz sensor resonance and 72.9-kSPS sample rate are well-suited for machine-health applications and allow a system operator to identify failing equipment long before costly damage is sustained, said ADI. The programmable digital filter offers low-pass and band-pass configuration options.

“Catastrophic equipment failure is the worst-case scenario for any manufacturing operation and can be very costly in terms of lost productivity,” said Mark Martin, vice president, MEMS and Sensors Technology Group, Analog Devices, in a statement. “By adopting MEMS vibration sensors like the multi-axis vibration sensor, earlier detection of changes in a vibration profile is possible and can be used to reduce system downtime. Process engineers can now more easily isolate the vibration source and have improved diagnostic accuracy over that available with unreliable vibration switches or labor intensive handheld monitors.”

The ADIS16223, packaged in a 15 x 15 x 15-mm module, is available in a +/- 70g dynamic range, across three axes. The 22-kHz sensor resonance and 72.9-kSPS sample rate provide a flat frequency response from DC to 10 kHz, which is desirable for most machine-health applications, said ADI. The extended operating temperature range is -40°C to +125°C.

With the SPI interface, configuration options include programmable digital filters offering low-pass and band-pass options, condition monitoring /alarm settings, capture buffers configuration control, and embedded self test control. Users can also access serial number and device ID registers.

The data capture function offers three different trigger modes, allowing in-system adaptation of the sensor to the end-systems product life cycle. Automatic data collection allows for periodic wake-up and capture, based on a programmable duty cycle. Manual data capture mode allows the user to initiate a data capture, providing power and read-rate optimization. The event capture mode continuously updates the buffers and monitors them for a preset trigger condition. This mode captures pre-event data and post-event data and produces an alarm indicator for driving an interrupt.

The ADIS16223 also offers a digital temperature sensor, digital power supply measurements, and peak output capture.

Availability: Available now in sample quantities followed by production quantities in June 2010.
Pricing: $145 per unit in quantities of 1,000.