USB Module Performs Sound And Vibration Analysis

The DT9837A from Data Translation is a multi-function USB module for portable noise and vibration analysis applications such as automotive testing, acoustics and sonar. It has four independent 24-bit IEPE (integrated electronics piezo electric) sensor inputs that are synchronised with a tachometer input to provide data streams for field or laboratory use. This small rugged module is self-powered via the USB connection to a PC or laptop. BNC connections are provided for all I/O signals for secure operation.

The DT9837A USB module offers four simultaneous 24-bit Delta-Sigma A/Ds with support for IEPE inputs including programmable 4mA current source, AC or DC coupling and a gain of one or 10 per channel. Two modules can be synchronised in master/slave configuration. Tachometer input support in the A/D data stream allows rotational speed and synchronising measurements with 0.002deg resolution at 10,000rpm. The module has a sampling rate of more than 52kHz per input channel. The simultaneous operation of A/D and D/A subsystems can offer maximum performance.

One 24-bit Delta-Sigma D/A converter can be used for single-value or smooth-output waveform generation. The device is available as a complete unit or as an OEM version without the enclosure. The DT9837A is supported by Measure Foundry, Data Translation's rapid application development and solution-based software package. This allows the user to create noise and vibration applications using the included library and applets.

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