An industrial camera audio processing module with sound field direction analysis

CN224290035UActive Publication Date: 2026-05-26HANGZHOU HANCHENG MASCH EQUIP CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HANGZHOU HANCHENG MASCH EQUIP CO LTD
Filing Date
2025-04-30
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Traditional industrial cameras lack acoustic signal acquisition and analysis modules, which makes them unable to assist visual inspection in complex industrial environments. They also suffer from insufficient sound source localization accuracy, low multimodal collaboration efficiency, and an inability to accurately match sound source coordinates with image frames.

Method used

By employing an asymmetric microphone array, temperature compensation circuit, and acoustic-optical synchronization protocol, combined with an FPGA chip and an ARM processor, high-precision sound field orientation analysis is achieved. Multimodal collaborative detection is realized through beamforming calculation and time delay difference positioning.

Benefits of technology

It improves sound field resolution, enhances environmental adaptability, reduces positioning error, and achieves pixel-level mapping between sound source coordinates and visual images, thereby improving the real-time performance and accuracy of detection.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224290035U_ABST
    Figure CN224290035U_ABST
Patent Text Reader

Abstract

This utility model discloses an audio processing module for an industrial camera with sound field direction analysis, including a microphone array containing at least three asymmetrically distributed directional microphones, configured in the circumferential edge region of the industrial camera housing, for acquiring multi-channel audio signals within the target sound field range; through the setting of high-precision sound field direction, and through a dual-layer asymmetrical microphone array (6 cardioids in the inner ring + 12 supercardioids in the outer ring) and MVDR beamforming algorithm, a 2.5° azimuth resolution is achieved in the 12kHz frequency band, which is 67% higher than that of traditional uniform arrays, and effectively suppresses multipath reflection interference in the industrial environment (positioning error < ±5cm / 3m).
Need to check novelty before this filing date? Find Prior Art