International Journal of Instrumentation Control and Automation


Structural health monitoring is an important safety factor in aviation that might benefit from advanced smart systems for damage sensing. This paper presents a new concept for a wireless crack and corrosion detection system for onboard health monitoring of aircraft. The sensor which is use to identify the structural damage and material loss on the surface of the aircraft by Ferrous Fluid under magnetic field. The Ferro fluid shall be applied as an emulsion on the test substrate. When a crack occurs, due to the crack there will a flux leakage. By constantly monitoring the flux on the surface of the substrate, whenever there is a flux leakage we can correlate it to a crack. The Ferro fluid shall be a ferromagnetic material and the particles should be in sub micron or nanometer region. These particles shall be mixed in suitable surfactants to get a uniformly monodispersed emulsion. This emulsion is to be applied on the test substrate and then the flux generated due to the emulsion shall be first measured. This measured flux density shall be taken as the baseline. Any deviation from the baseline shall be considered as flux leakage. It is possible to differentiate between the signals received from a crack and corrosion. One of the advantages of the present set up using Ferrous Fluid Sensor (FFS) for the generation and detection of signals can be easily processed by wireless application. The signal sensed by the FFS is transmitted to the cockpit through the wireless sensor network for monitoring of crack and corrosion on the surface of the aircraft.



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