Holographic Sound Field Inspection

Macroscopic Panoramic Perception

Core Technology: Holographic Sound Field Inspection

In the field of industrial equipment operation and maintenance and fault diagnosis, strong background noise and multi-source coupling within large spaces easily swamp anomalous source signals. Conventional detection methods, constrained by a fixed viewing angle and small coverage area, leave numerous “blind zones,” making it difficult to rapidly lock onto the location of an anomalous source. Centered on the holographic sound field inspection instrument, the GroupCore Acoustic holographic sound field inspection system fundamentally resolves this pain point, achieving a revolutionary leap from “local scanning” to “global gazing.”

I. Core Technical Principles

The holographic sound field inspection instrument adopts a distinctive spherical microphone array design. Abandoning the conventional motorized pan-tilt rotation scheme, it achieves one-shot native coverage of hemispherical space (360°×180°), physically realizing blind-zone-free sound field acquisition over the entire spherical space. A single deployment enables panoramic mapping of global acoustic hotspots, and work efficiency rises exponentially.

On this basis, the system incorporates AI multi-source Blind Source Separation (BSS). Blind source separation is a signal processing method that extracts the original source signals solely from observed mixed signals, without requiring any prior information. Through a full-chain AI algorithm, the system precisely separates various interfering signals from strong background noise (ambient noise at industrial sites often reaches 80–90 dB), bringing weak anomalous signals that were originally submerged “to the surface” and transforming “chaos” into “clarity.” This technology delivers 12 dB of equivalent noise reduction—functioning like “super active noise cancellation”—capturing weak anomalous signals with high dynamic fidelity against strong background noise. The separated signals can then undergo AI-automated diagnosis to intelligently classify various fault signatures.

II. Cross-Industry Application Value

• Power industry: In complex electromagnetic environments such as substations and distribution rooms, the system rapidly scans the full-domain sound field distribution of equipment such as transformers and switchgear, capturing in real time anomalous acoustic signature signals such as partial discharge and core loosening. A single deployment completes large-scale equipment inspection tours, substantially improving the efficiency and coverage of power equipment condition monitoring.

• Oil & gas and petrochemical industries: In extensive industrial scenarios such as refining units and tank farms, the system performs dead-zone-free sound field scanning of key equipment such as pipeline valves and reactors, rapidly localizing anomalous sources such as gas leaks and abnormal operating conditions. It is particularly well suited to unmanned inspection in high-risk areas, reducing the risk of personnel exposure.

• Machinery and industrial manufacturing: In complex noisy environments such as production lines and power workshops, the system rapidly troubleshoots the sources of abnormal noise in rotating machinery such as compressors, fans, and pump sets, providing a full-domain acoustic view for predictive maintenance.

III. Summary of Technical Advantages

The holographic sound field inspection instrument is responsible for dead-zone-free inspection and strong-noise decoupling in large industrial scenarios, rapidly establishing global acoustic situational awareness and providing an efficient full-domain acoustic view for equipment condition monitoring and fault diagnosis.