Natural gas

Engineering

Aerospace engineering

Leak

Marine engineering

Aperture (computer memory)

Range (aeronautics)

Gas leak

Computer science

Acoustics

Geology

Synthetic aperture sonar

Oceanography

Waste management

Mechanical engineering

Sonar

Environmental engineering

Transducer

Physics

Organic chemistry

Pipeline (software)

Synthetic aperture radar

Artificial intelligence

Underwater

Pipeline transport

Chemistry

Programming language

Journal of Marine Science and Engineering

Natural gas is an important source of energy. Underwater gas pipeline leaks, on the other hand, have a serious impact on the marine environment; hence, the need for a reliable and preferably automated inspection method is essential. Due to the high impedance difference and strong scattering properties of gas bubbles in the marine environment, sonar systems are recognized as excellent tools for leak detection. In this paper, a new method for gas leak detection is proposed based on gas bubble acoustic scattering modeling using Synthetic Aperture Sonar (SAS) technology, in which a coherent combination of gas bubble and pipeline scattering fields at different angles along synthetic apertures is used for leak detection. The proposed method can distinguish leak signals from the background noise using coherent processing in SAS range migration. SAS as an active sonar can collect accurate information at wide area coverage rate, independent of operating range and frequency, which can potentially reduce the time and cost of pipeline inspection. The simulation and comparison results of the proposed method based on coherent processing of synthetic aperture technology and the real aperture system show that the proposed method can effectively distinguish gas bubble signals at different ranges even in a single pass and improves pipeline leak detection operations.

Efficient Detection of Underwater Natural Gas Pipeline Leak Based on Synthetic Aperture Sonar (SAS) Systems