Single-sensor acoustic camera based on space folding acoustic metamaterial

Abstract

The invention provides a single-sensor acoustic camera based on a space folding acoustic metamaterial. The camera comprises one or more acoustic channel modules and an acoustic sensor; acoustic channels with space folding structures are formed in the acoustic channel modules, one end of each acoustic channel is an acoustic input end, and the other end of each acoustic channel is an acoustic outputend; different acoustic channel modules are adjacently placed, and the acoustic output ends face the same position; the acoustic sensor is arranged on the position where the acoustic output ends face; a sound wave enters the acoustic channels from the acoustic input ends of the acoustic channel modules, and the incident sound wave is subjected to directional modulation, then output by the acoustic output ends and acquired by the acoustic sensor. The camera only contains one acoustic sensor, a model can be manufactured through 3D printing, and the camera has the advantages of wide frequency bandwidth, high precision, small size, low cost and the like.

Description

technical field [0001] The invention relates to the technical field of acoustic imaging, in particular to a single-sensor acoustic camera based on spatially folded acoustic metamaterials. Background technique [0002] Acoustic imaging has important applications in acoustic target tracking, clinical therapy, and structural health monitoring. At present, acoustic imaging is mainly based on acoustic sensor arrays. Acoustic signals are picked up by sensor arrays and combined with various imaging algorithms to achieve high-precision imaging of the spatial sound field. However, the acoustic sensor array requires multi-channel data synchronous acquisition, and the spatial resolution and bandwidth of imaging depend on the number of sensors and the array aperture. Therefore, the system is complex, bulky, and costly, which limits the application of the acoustic sensor array. Contents of the invention [0003] Aiming at the defects in the prior art, the object of the present inventi...

AI Technical Summary

Problems solved by technology

However, the acoustic sensor array requires multi-channel data synchronous acquisition, and the spatial resolution and bandwidth of the imaging depend on the number of sensors and the array aperture, so the system is complex, bulky, and costly, which limits the application of the acoustic sensor array.

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