Acoustic emission test device and test method for cavitation visualization and state recognition of water jet propulsion pump

The invention discloses an acoustic emission test device and test method for cavitation visualization and state recognition of a water jet propulsion pump, and the method comprises the steps: multi-medium optical path calculation, computer finite element, acoustic emission signal propagation mechanism, acoustic emission signal change rule in the cavitation process, and conventional housing material and organic glass sound wave transmission characteristic analysis. The form and the size of the outer surface of the organic glass shell are optimized, the cavitation observation distortion degree is effectively reduced, installation deformation is overcome, and meanwhile the weight of the shell is greatly reduced; an integrated full-transparent shell is optimally designed, and the axial visualization degree in the pump is increased; a cavitation acoustic emission signal acquisition device is optimally designed, and lossless and multi-source collection of acoustic emission signals is realized by adopting a method o