Wireless data acquisition for sound and vibration
14 November 2008
National Instruments has released a wireless data acquisition module and two PXI Express modules for sound and vibration applications. With the NIWLS-9234 wireless dynamic signal acquisition (DSA) module, engineers can stream vibration data wirelessly over the IEEE 802.11g (Wi-Fi) standard to distributed monitoring systems. The PXI Express DSA modules, the NI-PXIe-4496 and PXIe-4498, make it possible to acquire data from 272 channels at full rate in a single PXI Express chassis.
Wireless data acquisition for sound and vibration applications
The WLS-9234 offers four simultaneously acquired input channels, each with 24-bit resolution and a 51.2 kS/s maximum sampling rate. The module delivers 102 dB of dynamic range and incorporates software-selectable AC/DC coupling and integrated electronic piezoelectric (IEPE) signal conditioning for accelerometers and microphones. The WLS-9234 relays data wirelessly over a Wi-Fi network, allowing for easy distributed I/O, and provides support for various wireless security protocols including WEP, WPA and WPA2 (IEEE 802.11i) to protect data and network integrity. In addition, the module features support for direct Ethernet connection.
The NI PXIe-4496 and PXIe-4498 modules offer 16 simultaneously acquired channels, each with 24-bit resolution, 204.8 kS/s maximum sampling rates and a 113 dB dynamic range. The modules are based on the PXI Express bus architecture, which offers higher throughput than PXI and makes it easy to synchronise up to 17 NI PXIe-449x modules in a single chassis and simultaneously acquire data at full rate. The NI PXIe-4496 and PXIe-4498 modules are designed for interfacing with accelerometers and microphones that require constant current power.
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