Imaging of Time and Space Variation of Vortex Wind Velocity Fields Using Acoustic Tomography

Abstract

A technique for monitoring the strong vortex wind field is much required with the rapid increase in global warming. For the realization of the technique, the acoustic tomography of two-dimensional vortex air flow profile was proposed, which can be reconstructed by arraying approximately 10 pairs of transmitters and receivers in parallel. To show the feasibility of the present method, experimental results of performance evaluation using an indoor simulation system are presented. In particular, the reproducibilities of time and space variations of the vortex wind fields passing through the monitoring region were examined. To achieve the real-time capability, a correction scheme for the error caused by the time lag in the sequential sampling was introduced. As a result, vortex wind velocity fields could be reconstructed with a high-speed frame rate while keeping a satisfactory tractability against time and space vortex wind field variations.