Thermal shock will lead to local fragmentation and delamination of ice on the surface of aircraft.In view of the problem that it is unavailable to acquire the information of delamination of ice at present,a non-contact detection using ultrasonic pulse-echo technology is proposed to evaluate the degree of debonding of ice.Firstly,a two-dimensional model including ultrasonic sensor,aluminum surface and ice layer is established by PZFlex software.Based on the model,the relationship between the delamination parameters and the received echo signals is analyzed.Then the evaluation method of local icing delamination is preliminarily proposed.In or-der to verify the feasibility of the proposed evaluation method,an experiment is performed on the experimental platform based on LabVIEW software.When the aluminum plate ice interface temperature rised from-24 ℃ to-4 ℃ under 1.6 W/cm2,the delamination area within the detection area reach more than 62.8％.The results show that the non-contact ultrasonic pulse-echo detection can effectively evaluate the local delamination degree of ice within the detecting range,which can provide the accurate information of ice on the swings to the deicing system.
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