Abnormal Sound Detection with Sequential Microphone Array Coverage
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Solution Overview
Problem
Conventional abnormal sound detection devices face challenges in accurately identifying the regions of passive components generating abnormal sounds due to fixed audio collectors' limited coverage and complex movable-type collector mechanisms, leading to inefficient and costly sound analysis.
Innovation Solution
An abnormal sound detection device with plural audio collectors in an array arrangement, selectively enabling audio collection units at different time points to generate and analyze vibration audio signals sequentially, using frequency-sweeping and pink noise test signals to enhance hardware control efficiency and reduce analysis complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed-type audio collectors are used, then the device complexity is reduced, but the sound-receiving coverage range is insufficient and cannot effectively detect all regions of the passive component
Solution Approach 1:
The audio collecting device is divided into multiple audio collection units, each responsible for collecting sound waves from different regions of the passive component. This segmentation allows the system to maintain fixed-type simplicity while achieving comprehensive coverage through distributed collection points.
Solution Approach 2:
Multiple audio collection units are combined into a single audio collecting device that operates under unified control. The controller coordinates all audio collection units to sequentially enable different units based on the test signal frequency, merging their individual coverage areas into a comprehensive detection system.
2Area of stationary object
If movable-type audio collectors are used, then the sound-receiving coverage range is improved, but the device complexity and control mechanism become very complicated
Solution Approach 1:
The system implements dynamic selection of audio collection units based on the frequency of the test signal. The controller dynamically enables different audio collection units in sequence according to the test signal frequency, allowing the fixed-type collectors to adaptively cover different frequency ranges without physical movement.
Solution Approach 2:
The patent replaces the mechanical movement system of movable-type audio collectors with an electronic control system that selectively enables different fixed-type audio collection units. This substitution eliminates complex mechanical structures while achieving equivalent coverage through electronic switching and sequential activation.
3Area of stationary object
If plural fixed-type audio collectors are used in array arrangement, then the sound-receiving coverage range is improved, but the number of vibration audio signals increases and analysis workload becomes very large
Solution Approach 1:
The controller enables different audio collection units in periodic sequence according to the test signal frequency. Instead of simultaneously processing all audio collection units, the system activates them in a time-division manner, reducing the number of signals that need to be processed at any given moment while maintaining comprehensive coverage.
Solution Approach 2:
The system extracts and processes only the relevant audio signals from the enabled audio collection unit at each time point, rather than processing all signals from all units simultaneously. This selective extraction approach reduces the analysis workload by focusing on the subset of signals that are currently active and relevant to the current frequency range.
4Productivity
If fixed-type audio collectors are used, then the hardware control efficiency is improved, but the ability to identify specific regions generating abnormal sound is reduced
Solution Approach 1:
The audio collecting device is segmented into multiple audio collection units, each associated with specific regions of the passive component. This segmentation enables precise identification of abnormal sound sources by determining which specific audio collection unit detected the anomaly, thereby maintaining both control efficiency and identification accuracy.
Solution Approach 2:
The controller receives feedback from each audio collection unit and uses this information to identify the specific region generating abnormal sound. By monitoring which audio collection unit detects the abnormality and its corresponding spatial location, the system can precisely locate the problem area while maintaining simple fixed-type hardware control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device precisely recognizes and analyzes vibration audio signals, reducing complexity and cost by enhancing hardware control efficiency and improving sound detection accuracy.
Implementation Method 1
the vibration simulation mechanism generates a vibration force in response to abnormal sound detection signals at specified detection frequencies. In response to the vibration force, the peripheral interface device generates a vibration sound wave
Implementation Method 2
a small number of audio collectors (e.g., a single microphone or a single row of microphones) are used to collect the vibration sound wave, and a vibration audio signal is correspondingly generated
Data Source
AI summary
An abnormal sound detection device for detecting a peripheral interface device includes a vibration simulation mechanism, an audio collecting device with plural audio collectors, and a controlling and analyzing device. The peripheral interface device generates a vibration sound wave in response to a vibration force from the vibration simulation mechanism. The plural audio collectors are used to collect the vibration sound wave and generate a vibration audio signal. The plural audio collectors are divided into at least two audio collection units. The controlling and analyzing device generates an abnormal sound detection signal. The vibration audio signal is inputted into the controlling and analyzing device. The controlling and analyzing device detects and identifies whether there is an abnormal sound phenomenon in the vibration audio signal. The abnormal sound detection signal contains at least two abnormal sound detection sub-signals in serial sequence.