Abstract
Acoustic beamforming is usually used as an off-line analysis tool for noise source identification (NSI). The computational requirements of beamforming make real-time processing difficult to achieve in conventional NSI measurement systems. This limitation prevents conventional NSI measurement systems being used in applications like on-line monitoring. This paper presents the theory, design, and development of a real-time NSI measurement system based on reconfigurable I/O Field Programmable Gate Array (FPGA) technology. Some techniques used in applying beamforming analysis methods with an FPGA are outlined. Signal processing includes time filtering of input data and spatial beamforming with special treatment to obtain the best result. Pipelining methodology is used to make full use of the FPGA resources and reach high performance for real-time applications. Test examples are given to demonstrate the some applications for NSI.
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