MILITARY, AEROSPACE & DEFENCE FEATURE
range of operational conditions as well as eliminate false positives. Jeff Mazurek from the company
commented: “Using Chameleon turnkey software, the NI PXI hardware platform, and source control based on NI LabVIEW and DAQ software, we can measure more than 32 channels of pressure data from our sensors with expansion capabilities while maintaining time- synchronised data from transient shot events on the firing range.” The system was successfully tested in a
football stadium with simulated crowd noise and reverberation as well as in a US Military Operations in Urban Terrain training facility. Over 10,000 systems are currently fielded by the military.
DATA ACQUISITION As part of the ongoing improvements to Boomerang, the company decided to replace an older DAQ system and, needing an out-of-the-box solution, it selected the Chameleon DAQ system from PVI Systems. Chameleon is a flexible, scalable, turnkey, PXI-based DAQ system that works with the NI PXI-449x dynamic signal acquisition modules used to record data from the microphones as well as NI PXI-668x timing and synchronisation modules. Additional
sensors will be added in the future. Mazurek added: “The DAQ rates, up to
204.8 kS/s for 24-bit dynamic signal acquisition, are simply amazing. When testing to improve systems, we often collect many channels of data at high sample rates. With this new system, we can easily adjust our sampling rate to optimise overall system performance.” The Chameleon system provides built-in
functionality for diverse DAQ applications for I/O channel synchronisation, time and frequency acquisition, live monitoring of all channels, and post-acquisition data display and processing. It supports reconfigurable hardware for multiple test programs, which is important for the variety of tests that have to be run. “Using Chameleon turnkey software, the
NI PXI hardware platform, and source control based on NI LabVIEW and DAQ software, we can measure more than 32 channels of pressure data from our sensors with expansion capabilities while maintaining time-synchronised data from transient shot events on the firing range,” explained Mazurek.
1 The system exports data to popular file
formats such as .mat, CSV, .uff, and TDM streaming for post-processing analysis, and can be easily and quickly configured. The built-in tools for spectral analysis are also said to be useful if you want to observe signals in real time. After more than a year in harsh
conditions, the Chameleon DAQ system has proven to be rugged and reliable.
National Instruments
http://uk.ni.com
Raytheon
www.bbn.com Imperial College London
www3.imperial.ac.uk
Enter 672
Raytheon BBN’s Boomerang shooter detection system
All cadavers used in the research have been donated to medical science by the donor prior to their death, in consultation with their relatives. All work complied with the Human Tissue Act 2004 (which replaced the Human Tissue Act 1961, the Anatomy Act 1984, and the Human Organ Transplants Act 1989) governed by the Human Tissue Authority, which outlines the use of human tissue for scientific purposes in the UK.
Enter 20 / INSTRUMENTATION
Enter 21 INSTRUMENTATION | JULY/AUGUST 2014 27
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52