Acoustic Arc Detection in Multi-Module Electrical Systems
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Solution Overview
Problem
Existing methods for detecting and locating electrical arcs in electrical systems, particularly in systems with multiple modules, fail to accurately identify the defective module causing the arc, leading to inefficiencies in maintenance and potential safety hazards, especially in applications like batteries where traditional methods are hindered by low impedance or concealed connections.
Innovation Solution
A method involving the application of a modulated current specific to each module, measurement of the accompanying acoustic signal, identification of a signature through correlation, and determination of the propagation time of the acoustic wave to locate the defective module using multiple acoustic sensors for triangulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional detection methods (current/voltage measurements) are used, then arc detection is possible, but the method fails in low impedance applications like batteries where voltage signature is weakened
Solution Approach 1:
The patent replaces electrical measurement methods (current/voltage) with acoustic field measurement. By detecting the acoustic wave generated by the electrical arc, the system can reliably detect arcs in low impedance applications like batteries where traditional electrical measurements fail due to weakened voltage signatures.
Solution Approach 2:
The patent introduces acoustic wave as an intermediary to detect electrical arcs. Instead of directly measuring electrical parameters that are compromised in low impedance systems, the system measures the acoustic signal generated by the arc, which serves as an intermediate indicator that works effectively across different impedance levels.
2Reliability
If multiple sensors are used to overcome detection limitations, then detection capability improves, but cost increases substantially
Solution Approach 1:
The patent makes a single acoustic sensor perform multiple functions: detecting the presence of an arc, identifying the specific module where the arc occurs, and determining the location of the arc. This multi-functionality eliminates the need for multiple specialized sensors, reducing both cost and system complexity while maintaining high detection reliability.
3Reliability
If optical radiation measurement is used, then arc detection is possible, but the method fails for concealed connections behind protective cases or within modules
Solution Approach 1:
The patent replaces optical measurement with acoustic measurement. Acoustic waves can penetrate through protective cases and module structures that block optical radiation, enabling detection of concealed connections and arcs located within enclosed modules where optical methods fail.
4Reliability
If electromagnetic field measurement is used, then arc detection is possible, but false alarms increase substantially in noisy electromagnetic environments
Solution Approach 1:
The patent substitutes electromagnetic field measurement with acoustic wave detection. Acoustic signals are immune to electromagnetic interference and environmental noise, eliminating the false alarm problem that plagues electromagnetic-based detection methods in noisy environments.
5Reliability
If electromagnetic field measurement is used, then arc detection is possible, but response time is relatively long
Solution Approach 1:
The patent replaces electromagnetic field measurement with acoustic wave detection. Acoustic waves travel at the speed of sound through the medium (air, gas, or solid), providing faster response time compared to electromagnetic methods, enabling more rapid detection and response to arc events.
6Reliability
If existing arc detection methods are used, then arc detection is possible, but the defective module cannot be identified
Solution Approach 1:
The patent applies local quality by assigning unique acoustic signatures or detection characteristics to each module in the system. When an arc occurs, the acoustic signal contains information about which specific module generated it, enabling precise localisation and identification of the defective module without requiring complex additional sensing infrastructure.
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
This approach allows for precise identification and localization of electrical arcs within complex electrical systems, enhancing maintenance efficiency and safety by accurately pinpointing the defective module, even in challenging environments like batteries with low impedance or concealed connections.
Implementation Method 1
application to each of the modules of a current which is modulated by a signal that is specific to the module
Implementation Method 2
measurement of an acoustic signal that accompanies an electrical arc generated by a defective module
Implementation Method 3
measurement of an acoustic signal that accompanies an electrical arc generated by a defective module
Implementation Method 4
identification of a signature of one of the specific signals in the measured acoustic signal in order to identify the defective module
Data Source
AI summary
The invention relates to an electrical system comprising a plurality of modules that can be powered independently withy current, characterized in that it further comprises:a module configured to apply to each of the modules a current which is modulated by a signal specific to the module,an acoustic sensor enabling the measurement of an acoustic signal that accompanies an electrical arc generated by a defective module,a treatment unit configured to identify a signature of one of the specific signals in the acoustic signal measured by the acoustic sensor in order to identify the defective module.The invention also relates to a method for locating faults in such an electrical system.