Acoustic Sensor Assembly for Coolant Leak Detection in Electric Arc Furnaces
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Solution Overview
Problem
Current methods for detecting water leaks in electric arc furnaces (EAF) are prone to human error, signal noise, and high false alarm rates, and existing systems are complex and costly, failing to provide reliable real-time detection of water leaks which poses a significant explosion risk.
Innovation Solution
An acoustic sensor assembly is positioned within the coolant-fluid flow to transmit and receive acoustic signals at frequencies above and below background noise, allowing for the detection of leaks by comparing sensed frequencies with predetermined target profiles, reducing interference from ambient noise and providing early warning or control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If visual inspection or pressure/flow monitoring is used to detect water leaks, then detection capability is provided, but false alarm rates increase and reliability decreases due to signal noise and human error
Solution Approach 1:
The patent replaces mechanical pressure/flow monitoring systems with acoustic emission detection. Acoustic sensors detect the unique sound frequencies generated by water leaking through cracks in cooling panels, substituting mechanical measurement with acoustic field detection to eliminate false alarms from pressure fluctuations and improve detection reliability.
Solution Approach 2:
The patent uses spectral analysis of acoustic signals, where different leak conditions produce distinct frequency 'color' signatures. By analyzing the frequency spectrum of acoustic emissions, the system can distinguish between normal operational sounds and actual leak signals, improving measurement precision and reducing false alarms.
2Reliability
If multiple cooling water circuits with flow, temperature and pressure sensors are installed on each panel, then leak detection effectiveness increases, but device complexity and cost increase
Solution Approach 1:
The patent extracts the leak detection function from the complex multi-sensor network and implements it through a single acoustic emission detection system. By removing unnecessary flow, temperature, and pressure sensors from each panel while retaining acoustic sensors, the system reduces device complexity while maintaining or improving leak detection effectiveness through direct acoustic monitoring of leak sounds.
3Measurement precision
If acoustic sensors operate in the background noise frequency range, then detection sensitivity increases, but false readings increase due to interference from ambient noise
Solution Approach 1:
The patent changes the operational frequency parameter of acoustic sensors to operate above the background noise spectrum. By selecting acoustic frequencies higher than typical furnace ambient noise, the system maintains high detection sensitivity for leak sounds while minimizing interference from harmful ambient noise factors.
Solution Approach 2:
The patent skips through the noisy background frequency range and directly targets the higher frequency range where leak acoustic emissions occur. By rushing through the problematic low-frequency noise band and focusing detection efforts in the cleaner high-frequency range, the system achieves both sensitivity and noise immunity.
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 system effectively reduces false readings and provides fast, reliable detection of water leaks, minimizing the risk of explosions by accurately identifying anomalies in the coolant-fluid flow, thus enhancing safety and operational efficiency.
Implementation Method 1
an acoustic sensor assembly which is positioned and configured to transmit, receive and sense one or more acoustic signals in the coolant-fluid flow
Data Source
AI summary
A system used in monitoring one or more operating parameters of a coolant-fluid cooled industrial installation includes one or more an acoustic sensors positioned to receive and sense one or more acoustic signals in an installation coolant-fluid flow. The acoustic sensor assembly operates to emit and sense acoustic signals at frequency ranges above and/or below the background noise frequency ranges which are associated with the normal industrial installation operation. Output data signals representative of sensed acoustic signals are compared to target frequency profiles predetermined as representing an acoustic frequency associated with a predetermined installation operating parameter or event.