The ability to remotely monitor the structural and mechanical integrity of dynamic systems is key for many applications in the manufacturing industry. Interferometric laser vibrometers offer a solution which enables contactless, remote sensing with precision exceeding 1 micron resolution.
In this project, we use optical interferometry to measure sub-micron scale acoustic vibrations off diffusely scattering targets. When combined with digital signal multiplexing techniques and multiple receivers, it facilitates the extraction of absolute distance and spatial position of the target through triangulation.
The development of this system combines optical interferometry with real-time digital signal processing using field programmable gate arrays (FPGAs). The project may also investigate the feasibility and design of a multi-target acquisition system.