Automatic detection method for defects of internal plate layer of wind power blade

The invention relates to a method for automatically detecting defects of an internal plate layer of a wind power blade, which comprises the following steps of: obtaining detection data through an ultrasonic phased array gate, selecting an acquisition point signal with the highest wave height in each depth axis, and converting the signal into a C scanning image; calculating the position relation of the selected signals, and establishing a search index; searching the index, discriminating the signals in the index one by one, searching a starting point of a defect, searching a complete defect by using a defect detection algorithm according to a wave height value parameter of adjacent signals, and recording defect information in a defect list; according to the defect information, finding the highest wave height part of the defect, and rechecking the position, the shape and the size of the defect by using a defect rechecking algorithm according to the wave height parameter; through a defect processing algorithm, t