Leakage detection in hydraulic and pneumatic systems through infrared thermography and CO2 as tracer gas

Speaker:
Lasagni, Fernando; CATEC - Advanced Center for Aerospace Technologies; Spain

Authors:
Rodriguez, B.; CATEC – Advanced Center for Aerospace Technologies; Spain
Fernándes, R.; CATEC – Advanced Center for Aerospace Technologies; Spain
Lahera, M.; Airbus Defence & Space; Spain
Lasagni, F.; CATEC - Advanced Center for Aerospace Technologies; Spain

ID: ECNDT-0533-2018
Download: PDF
Session: Thermography and Thermosonics Techniques 2
Room: H1
Date: 2018-06-15
Time: 11:10 - 11:30

Every aircraft is plenty of fluid systems, both hydraulic and pneumatic. These systems are necessary for tasks such as fuel distribution and storage, mechanical actuators and carrying air to cabin interior between others. Manufacturing and assembly of these systems require the performance of leak testing for quality assurance. Traditionally, leakage detection testing is performed through system pressure decay monitoring once the system is filled with an inert gas or working fluid. If a pressure decrease is detected, leakages must be located usually by the application of soapy liquid in each junction point of system, which is a time-consuming task.
In this work, new advances in leakage detection are presented by active infrared thermography and using carbon dioxide (CO2) as tracer gas. The application of post-processing algorithms, developed within this work, allows the automatic detection of the leakages, as well as a qualitative approach for its sizing. These algorithms have been tested on different scenarios that simulate aircraft systems in an industrial environment.