Enhanced Pipeline Leak Detection Using Airborne Differential Absorption LIDAR

Abstract

Aerial leak detection by use of Differential Absorption LIDAR (DIAL) technology has become a viable technique for detecting, quantifying and pinpointing methane emissions from underground pipelines and operating facilities. This paper describes a number of leak detection survey projects performed throughout North America using the DIAL technology from a fixed wing aircraft. The technology was deployed: • In test situations designed to measure the detection capability and lower detection threshold; • In long distance, large diameter, high pressure natural gas transmission pipelines traversing extremely rugged terrain; • In medium pressure pipelines in populated, higher consequence areas. Results from each of the airborne DIAL leakage survey mission scenarios will be described.

Improvement Design of the Insulation Structure of High Temperature Pneumatic Duct System of the Aircraft

“…During normal operation ,the high temperature pneumatic duct system may break down due to the corrosion and external forces and then the pressurized hot air would be released and dispersing [1][2].For the intercrossing ducts close to some temperature-sensitive assembly such as electrical equipment and fuel storage compartments, the accidental rupture can not only make pressure drop dramatically in the pipe, but also lead to the malfunction of the corresponding system and the equipments around it [3][4][5][6]. So the reliability and durability of the leakage detection system are very important for flight.…”