Austin, TexasInstrumentation maker National Instruments (NI) now offers a small and ruggedized DSA (dynamic signal analyzer) built on the company's RIO (reconfigurable I/O) hardware. NI's new cRIO-4408 DSA, priced at less than $5000, is a 24-bit 8-channel data acquisition device for making high-accuracy sound and vibration measurements from IEPE (integrated electronic piezoelectric) sensors.
The NI CompactRIO platform comprises a low-cost acquisition system for applications that require high performance and reliability. It combines an open embedded architecture with small size, ruggedness, and DC power. CompactRIO systems weigh less than 3.5-lbs. and have -40°C to 70°C temperature ranges. They also offer 50-g shock ratings. CompactRIO is also useful for in-vehicle applications because of its dual 11-V to 30-V DC supply inputs.
Wide Dynamic Range
Because of its size and ruggedness, this cRIO-4408 Ethernet communications device can be used in-vehicle or for embedded machinery monitoring applications in harsh environments. In use, the cRIO-4408 delivers 102-dB of dynamic range and IEPE signal conditioning for accelerometers and microphones. Communication is through standard 10/100 Ethernet.
The cRIO-4408 also offer eight input channels that simultaneously acquire at rates from 2-Ksample/s to 33.3-ksamples/s (up to 50-ksamples/s for four channels). Built-in analog and digital anti-aliasing filters automatically adjust according to the sampling rate.
Sample LabVIEW Bits
The cRIO-4408 DSA also includes an example NI LabVIEW program. It details required TCP/IP communication, letting you plug in the device and assign it an IP address to begin acquiring data.
You can use the cRIO-4408 DSA with NI software, including the company's LabVIEW Sound and Vibration Toolkit and LabVIEW Order Analysis Toolkit. A cRIO-4408 bundled with the Sound and Vibration Toolkit is priced at about $6300.
These toolkits will let you calculate weighted sound levels, integrated vibration levels, baseband FFT (fast Fourier transforms), zoom FFTs, fractional octave analysis, frequency response, order tracking, and order spectra.
A software technical reference can be reviewed here.
For more details contact Ernest Martinez at National Instruments, 11500 No. Mopac Expwy., Austin, Texas 78759-3504. Phone: (800) 258-7022, or (512) 683-0100. Fax: (512) 683-8411. E-mail: firstname.lastname@example.org
National Instruments, 512-683-0100, www.ni.com