Frequency measuring device for bowl cavity component of superconducting cavity

The utility model discloses a frequency measuring device used for a bowl cavity part of a superconducting cavity, the bowl cavity part of the superconducting cavity comprises at least one bowl cavity, two ends of the bowl cavity are open, one end of the bowl cavity is large, and the other end of the bowl cavity is small, the frequency measuring device comprises two contact plates, at least two threaded fasteners, and at least one set and at most two sets of locking assemblies, one of the at least two contact plates is provided with a corresponding locking assembly, the contact plate corresponding to the locking assembly is used for abutting against the large end of the bowl cavity, and the two contact plates are arranged in parallel so as to clamp the bowl cavity component and are locked through at least two threaded fasteners; each set of locking assembly comprises an abutting ring, an abutting plate and at least three fasteners, the abutting ring is attached to the outer surface of the bowl cavity, the abut