Aiming at the problem that traditional single point icing sensor can't acquire multi-dimensional icing information of aircraft wing surface,use piezoelectric transducer array to collect vibration spectrum information of aluminum plate and by extracting characteristics of spectrum in attenuation and signal difference to realize the measurement of icing location,area information,icing thickness and the three-dimensional(3D)reconstruction of multi-point icing.Firstly,the influence of ice thickness and area on icing positioning precision is analyzed.Secondly,the parameter value of the optimal region recognition effect is determined by defining two evaluation indexes,accuracy and deviation rate.Finally,the relationship curve between signal difference coefficient and ice thickness is calibrated through ice thickness test,by which the 3D imaging results of icing are inverted.The test results show that the piezoelectric array icing detection system based on parallel line layout can realize the 3Dreconstruction of multi-point icing,which provides a new idea for 3D imaging of aircraft wing icing.
关键词
结冰探测/压电阵列/结冰区域定位/结冰三维成像
Key words
icing detection/piezoelectric array/icing area localization/3D imaging of icing
维普
万方数据