Auxiliary cap-shaped part detection structure and ultrasonic detection device

The utility model discloses an auxiliary detection structure for a cap-shaped part and an ultrasonic detection device, and belongs to the technical field of composite material product detection, the auxiliary detection structure for the cap-shaped part comprises a concave delay block, a convex delay block and a plane delay block, the concave delay block is provided with a first detection end, the end surface of the first detection end is a concave surface, and the convex delay block is provided with a second detection end; the concave surface is an arc surface and is arranged to be attached to the male R corner of the cap-shaped part; the convex delay block is provided with a second detection end, the end face of the second detection end is a convex face, and the convex face is an arc face and is arranged to be attached to the internal R corner of the cap-shaped part. The plane delay block is provided with a third detection end, and the end face of the third detection end is a plane. The ultrasonic detection