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Device for sound and vibration measurements

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article image Eight-channel data acquisition device.

NATIONAL Instruments has released a small, rugged dynamic signal analyser (DSA) built on NI reconfigurable I/O (RIO) hardware.

The new cRIO-4408 DSA is a 24-bit, eight-channel data acquisition device for making high-accuracy sound and vibration measurements from integrated electronic piezoelectric (IEPE) sensors.

Because of its small size, ruggedness and Ethernet communication, the device is ideal for in-vehicle or embedded machinery monitoring applications in harsh environments.

The cRIO-4408 DSA delivers 102 dB dynamic range and IEPE signal conditioning for accelerometers and microphones, as well as eight input channels that simultaneously acquire at rates from 2 to 33.3kS/s (up to 50kS/s for four channels).

In addition, it offers communication through standard 10/100 Ethernet and built-in analogue and digital anti-aliasing filters that automatically adjust according to the sampling rate.

Because the cRIO-4408 DSA includes an example National Instruments LabVIEW program that details the required TCP/IP communication, engineers simply plug in the device and assign it an IP address to begin acquiring data.

Engineers can use the cRIO-4408 DSA with NI software, including the NI LabVIEW Sound and Vibration Toolkit and LabVIEW Order Analysis Toolkit, to calculate weighted sound level, integrated vibration level, baseband and zoom FFTs, fractional octave analysis, frequency response, order tracking and order spectra.

The National Instruments CompactRIO platform is a low-cost acquisition system designed for applications that require high performance and reliability.

The platform combines an open, embedded architecture with small size, extreme ruggedness and DC power. CompactRIO systems weigh less than 3.5 pounds with a -40 to 70°C temperature range and 50g shock rating.

In addition, CompactRIO is especially useful for in-vehicle applications because of its dual 11-30 VDC supply inputs.

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