Customized solutions by acoustic and vibration performance

Acoustic and vibration-related issues often occur in complex environments. Multiple constraints mean that standard solutions or measurement systems available on the market are not always suitable.

In such situations, Metravib Engineering brings its expertise to support your Project team and helps you design and develop efficient mechanical solutions, customized measurement systems, and/or conduct relevant numerical studies.

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AGLED | Acoustic Gas Leak Early Detection

AGLED technology is a flagship example of our expertise in supervised AI. Developed through a long-standing R&D partnership with TotalEnergies initiated in 2018, this solution was designed for the monitoring of complex industrial sites.

Key capabilities of the AGLED system in its Network version include:

  • A system of antennas connected via a server that merges information from the various sensors.
  • Detection of any type of gas.
  • Near real-time monitoring (analysis every 12 seconds).
  • Use of 4-microphone antennas for precise localization.
  • Leak detection, localization, and classification capabilities.

Key capabilities of the AGLED system in its Single-point version include:

  • An independent and autonomous sensor embedding processing codes.
  • Detection of any type of gas.
  • Real-time monitoring (analysis every second).
  • Use of 4-microphone antennas for precise leak origin determination, even in complex environments.
  • Leak detection, localization, and classification capabilities from an estimated monitoring distance.

In 2022, the prototype antennas obtained ATEX Zone 1 Ex ib IIC T4 Gb (-20°C < Ta < +45°C) certification.

Each antenna in the AGLED system integrates software for early gas leak detection and localization. Its main functions are to:

  • Record the audio signal captured by the antenna’s microphones.
  • Calculate and transmit a gas leak probability.
  • Determine and transmit angular localizations and a localization function.
  • Estimate the antenna’s state of health through a built-in self-test.

Advantages of the AGLED solution

AGLED stands out from existing technologies through several fundamental aspects:

  • Passive: It emits no signal and simply listens to the environment.
  • Detection: It works for any type of gas and enables 360° detection (non-ultrasonic detection) for flow rates as low as 1 g/s for methane (depending on the environment).
  • Localization: It can detect the direction of a leak (in its single-point version) or provide 360° three-dimensional localization of a leak’s position (accuracy < 5 m for a 10 g/s gas leak).
  • Smart: Detection is not based on a simple threshold but on a detailed analysis of the noise type by AI. Embedded neural networks recognize a leak by its acoustic typology.
  • Autonomous: The system operates without human intervention and includes monitoring of its own health status.
  • Low Maintenance: Feedback from prototypes shows high reliability, with minimal maintenance required (at most every 2 years).
  • Controlled False Alarm Rate: The solution integrates a continuous neural network retraining strategy upon operator request (can be reduced to less than 1 false alarm per month).

 

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AGLED BROCHURE

Benoit Teil, Metravib Engineering expert

Involved since 2018 in sales actions dedicated to the Energy sector

Our approach is always open to different possibilities and follows a rigorous approach to solving acoustic and vibration problems. Our tools allow us to carry out any kind of signal processing and analysis, even if a trained eye is sometimes sufficient. As far as solutions are concerned, Metravib uses advanced numerical simulations to solve critical problems, and provides you with its recommendations and implementation proposals while respecting your technical and budgetary constraints.

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