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Shock, vibration sensors roll for industrial monitoring

Posted: 28 May 2009 ?? ?Print Version ?Bookmark and Share

Keywords:shock vibration sensing? sensor? MEMS?

Analog Devices Inc. has extended its iSensor intelligent sensor product family with the introduction of two integrated inertial sensors that simplify the task of embedded shock and vibration sensing within harsh industrial environments.

The programmable ADIS16240 impact sensor delivers power efficiency and user configurability in embedded applications while detecting and storing critical events for subsequent analysis. The programmable ADIS16220 digital vibration sensor provides designers with the capability to automatically capture profiles of vibration shifts in machine performance and many other industrial applications that require wide-bandwidth sensing.

The ADIS16240 is a fully integrated digital shock detection and capture system that combines ADI's iMEMS technology with an embedded signal processing solution, enabling designers to convert motion data into system information in applications such as condition monitoring, impact detection, security sensing and tamper detection. The device's triple-axis shock and impact sensor and recorder includes an integrated on-chip programmable event capture buffer, which monitors for user programmed shock thresholds and holds pre- and post-event data, time-stamp, temperature and voltage.

Programming features and data access are controlled from a standard SPI port. Once implemented in the system, the device operates autonomously, capturing multiple events for later analysis or providing real-time indication of excessive shock environments.

With a usable bandwidth of up to 1.6kHz, the ADIS16240 is capable of capturing critical shock events. The ADIS16220 is a digital vibration monitor that combines ADI's iMEMS sensing technology with an embedded signal processor and data capture system. A digital interface combined with a 22kHz wide-bandwidth, high-g accelerometer provides engineers with the ability to design embedded vibration monitoring capabilities into industrial systems through a user interface with optimized power dissipation and user configurable controls. The ADIS16220 also has an SPI interface port.

The integrated and programmable vibration sensor captures 1024 samples on each of three inputs, at 100KSps. Programmable software features, which include peak sample and hold, trigger source and threshold levels, internal filtering and power management make the device tunable to specific applications or operational scenarios.

The 22kHz sensor bandwidth, 70g dynamic range, and 100kHz sample rate make the ADIS16220 effective for industrial applications, including safety controls, embedded vibration monitoring and bearing condition monitoring. The internal high-rate-capture buffers allow complete event profile capture and help with remote data transmission. Data capture is configurable to be user-initiated, timer initiated, or event initiated, allowing flexibility to meet either minimum power requirements or real-time notification of system problems.

The ADIS16240 is available now at a price of $26.58 per 1,000. ADIS16220 samples are available now, with production devices available June 2009 at a price of $53.00 per 1,000.

- Steve Bitton
Industrial Control Designline

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