Damage monitoring of titanium alloy structure of airplane has important meaning to ensure safety of aircraft.Put forward a kind of eddy current array sensor

study on different width crack of extension simulation monitoring experiment of TC4 titanium alloy are carried out.Research results show that output signal of each channel of sensor condition of TC4 titanium alloy with crack is amplified compared to standard signal under the condition with crack

along with the width of crack increasing

output signal amplitude increases

too.At the same time

simulation monitoring experiment research show that sensor has the ability of correct recognization and quntitive monitoring on crack with precision of 1 mm.