Compression Assembly Sound Sensor for Gas Leak Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ultrasonic gas leak detectors face reliability issues and sensitivity challenges in industrial environments, particularly due to high background noise, complex maintenance requirements, and limitations in Safety Integrity Level (SIL) ratings, which restrict their use in safety-critical systems and environments with explosive atmospheres.
Innovation Solution
A compression assembly for airborne sound detection using a piezoelectric transducer mounted within a Faraday cage, with a resilient means for maintaining compression and a self-test module to ensure reliable electrical contact and functionality verification, enhancing sensitivity and reducing maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If ultrasonic detectors are mounted on poles or walls at height to increase sensing range, then the detection coverage is improved, but maintenance becomes difficult and costly
Solution Approach 1:
The patent transitions from mounting detectors vertically on poles/walls to integrating them horizontally into process control systems and distributed control systems (DCS). This dimensional shift in deployment strategy allows detectors to be positioned at accessible locations while maintaining effective sensing ranges through strategic placement near potential leak sources and integration with existing infrastructure.
Solution Approach 2:
The patent introduces intermediate integration layers between the detector and the monitoring system, including integration with process control systems, DCS, and safety instrumented systems (SIS). These intermediaries enable the detector to be positioned at accessible locations while still achieving wide coverage through system-level coordination and multiple sensing points.
2Adaptability or versatility
If detectors cover a large dynamic range from 44 to +104dB, then they can detect all background levels, but sensitivity to weak signals decreases
Solution Approach 1:
The patent implements dynamic range adaptation by allowing the detector to adjust its operating parameters based on ambient noise levels. The system can switch between wide dynamic range mode for noisy environments and high sensitivity mode for quiet environments, optimizing performance for each specific condition rather than being fixed at a single operating point.
Solution Approach 2:
The patent employs parameter changes in the detector's electronic amplification and signal processing stages to optimize sensitivity for different background noise levels. By dynamically adjusting gain, filtering, and threshold parameters, the system maintains high sensitivity to weak leak signals while remaining adaptable to varying ambient acoustic conditions.
3Ease of manufacture
If simple detector design is used to achieve SIL rating, then manufacturing is easier, but no positive feedback is provided to control room indicating detector functionality
Solution Approach 1:
The patent incorporates feedback mechanisms that provide positive confirmation to the control room regarding detector functionality. This includes self-diagnostics, health monitoring, and status reporting that continuously verify the detector is operating correctly, enabling reliable SIL-rated performance without excessive complexity through intelligent monitoring and communication protocols.
4Object-affected harmful factors
If detectors are positioned at height to eliminate acoustic noise interference, then false alarms are reduced, but maintenance costs increase due to regular servicing requirements
Solution Approach 1:
The patent implements self-service capabilities including self-diagnostics, self-monitoring, and automatic health assessment that reduce the frequency and cost of manual maintenance. The detector can identify and report its own status, perform self-calibration where applicable, and provide predictive maintenance alerts, reducing reliance on expensive regular servicing while maintaining reliable operation in noisy environments.
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 solution provides improved sensitivity and reliability for detecting gas leaks, allowing for continuous functionality verification and increased Safety Integrity Level ratings, even in harsh environments with high background noise, and reduces maintenance costs.
Implementation Method 1
a piezoelectric transducer mounted in and electrically isolated from a Faraday cage wherein the transducer is arranged to convert the airborne sound to an electrical signal
Implementation Method 2
a piezoelectric transducer mounted in and electrically isolated from a Faraday cage
Data Source
Figure 1~2
Figure 3~5
AI summary
The present invention relates generally to an airborne sound sensor in the form of a compression assembly for detecting airborne sound. The system reduces the risk that workers will be exposed to dangerous high pressure gas jets which the industrial workers cannot see or hear escaping from high pressure industrial pressurized gas systems. A compression assembly (5) for detecting sound pressure level using a transducer (11) compressed against a top element (9) and a lower element (12) so as to compress the transducer (11) across the sensing faces.