Triaxial vibration sensor simplifies advancement of smart sensor nodes in CBM systems

The ADcmXL3021 Triaxial Vibration Sensor from Analog Devices is a wide bandwidth, low noise, highly integrated vibration monitoring module, consolidating advanced MEMS sensors and an optimised signal chain and embedded signal processing into a mechanically optimised package, allowing predictive maintenance solutions. The device is intended to simplify the advancement of smart sensor nodes in CBM systems.

The typical ultralow noise density (26μg/√Hz) in the MEMS accelerometers supports exceptional resolution. The broad bandwidth (DC to 10kHz within 3dB flatness) allows tracking of key vibration signatures on many machine platforms.

The signal processing comprises high-speed data sampling (220kSPS), 4096-time sample record lengths, windowing, filtering, FFT, user configurable spectral or time statistic alarms, and error flags. The SPI offers access to a register structure that includes the vibration data and a broad range of user-configurable functions.

The device is provided in a 23.7mm x 27mm x 12.4mm aluminium package with four mounting flanges to aid installation with standard machine screws. This package offers consistent mechanical coupling to the core sensors over a wide frequency range. The electrical interface is via a 14-pin connector on a 36mm flexible cable, which allows a broad range of location and orientation options for system mating connectors.

The device only needs a single, 3.3V power supply and supports an operating temperature range of -40C to +105C.