Analog Devices is expanding its iSensor intelligent sensor product family with the introduction of two highly integrated inertial sensors designed to 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. It is a fully integrated digital shock detection and capture system that combines AD’s iMEMS technology with an embedded signal processing solution, enabling designers to convert motion data into system information in low-power applications such as condition monitoring, impact detection, security sensing and tamper detection. The device’s low-power 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 (serial peripheral interface) port, making the ADIS16240 compatible with many existing systems. Once implemented in the system, it operates autonomously, capturing multiple events for later analysis or providing realtime indication of excessive shock environments. The device consumes less than 1 mA in continuous sampling mode, making it ideal for use in portable or battery-powered security devices, remote safety monitors or products that monitor the condition of goods or shipments. With a usable bandwidth of up to 1,6 kHz, it is capable of capturing critical shock events.
The programmable ADIS16220 digital vibration sensor provides designers with the capability to automatically capture profiles of subtle vibration shifts in machine performance and many other industrial applications that require wide-bandwidth sensing. It is a vibration monitor that combines AD’s wide-bandwidth iMEMS sensing technology with an embedded signal processor and data capture system. A digital interface combined with a 22 kHz bandwidth, high-G accelerometer provides engineers with the ability to design embedded vibration monitoring capabilities into industrial systems through a convenient user interface, optimised power dissipation and user configurable controls.
The ADIS16220 with an SPI interface captures 1024 samples on each of three inputs, at 100 kSps. Programmable software features, which include peak sample and hold, trigger source and threshold levels, internal filtering and power management, make the device easy to tune to specific applications or operational scenarios. The device’s ±70 G dynamic range makes it effective for industrial applications such as safety controls, embedded vibration monitoring and bearing condition monitoring. The internal high-rate-capture buffers allow complete event profile capture and ease the task of 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 realtime notification of system problems.
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