Patent ID: 11941329
Assignee: NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS
Field: Transport (Mechanical engineering)
Classification: CPC G  B  Y | IPC B  G

Claim 5:
6. The method of claim 1, wherein the deformation displacement measurement indicator μ is expressed as follows:, μ
   =
   
    
     
      
       p
       a
      
      -
      O
     
     
      
      
       
        p
        a
       
       -
       O
      
      
     
    
    ·
    
     (
     
      
       p
       a
       ′
      
      -
      
       p
       a
      
     
     )
    
   
  
  ;
 

wherein pa indicates a point on a projection plane where an angle between a fitted circle and an origin of a polar coordinate system is a; O is a center point of the polar coordinate system after the cross-section slice is aligned with the projection plane; and p′a is a point whose cross-section curve after deformation has an angle of a.