Patent ID: 11935191
Assignee: ZHEJIANG UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. The data processing method, as recited in claim 5, wherein a corrected two-dimensional coordinate of the feature point and the corrected displacement of the feature point along two directions of the two-dimensional coordinate system are calculated as:, {
  
    
      
        
          
            
              
                x
                f
              
              =
              
                R
                ⁢
                
                  
                
                ⁢
                arcsin
                ⁢
                
                  
                    Q
                    ⁡
                    
                      (
                      
                        x
                        ,
                        z
                      
                      )
                    
                  
                  R
                
              
            
          
        
        
          
            
              
                y
                f
              
              =
              y
            
          
        
        
          
            
              
                d
                xf
              
              =
              
                R
                ⁡
                
                  [
                  
                    
                      arcsin
                      ⁢
                      
                        
                          Q
                          ⁡
                          
                            (
                            
                              
                                x
                                +
                                
                                  d
                                  x
                                
                              
                              ,
                              
                                z
                                ′
                              
                            
                            )
                          
                        
                        R
                      
                    
                    -
                    
                      arcsin
                      ⁢
                      
                        
                          Q
                          ⁡
                          
                            (
                            
                              x
                              ,
                              z
                            
                            )
                          
                        
                        R
                      
                    
                  
                  ]
                
              
            
          
        
        
          
            
              
                d
                yf
              
              =
              
                d
                y
              
            
          
        
      
      ⁢
      
        

      
      ⁢
      Q
      ⁢
      
        (
        
          x
          ,
          z
        
        )
      
    
    =
    
      
        
          
            
              x
              3
            
            +
            
              
                x
                ⁡
                
                  (
                  
                    R
                    -
                    z
                  
                  )
                
              
              ⁢
              
                
                  
                    R
                    2
                  
                  -
                  
                    x
                    2
                  
                
              
            
          
          
            
              x
              2
            
            +
            
              
                (
                
                  R
                  -
                  z
                
                )
              
              2
            
          
        
        ⁢
        
          

        
        ⁢
        Q
        ⁢
        
          (
          
            
              x
              +
              
                d
                x
              
            
            ,
            
              z
              ′
            
          
          )
        
      
      =
      
        
          
            
              (
              
                x
                +
                
                  d
                  x
                
              
              )
            
            3
          
          +
          
            
              (
              
                x
                +
                
                  d
                  x
                
              
              )
            
            ⁢
            
              (
              
                r
                -
                
                  z
                  ′
                
              
              )
            
            ⁢
            
              
                
                  R
                  2
                
                -
                
                  
                    (
                    
                      x
                      +
                      
                        d
                        x
                      
                    
                    )
                  
                  2
                
              
            
          
        
        
          
            
              (
              
                x
                +
                
                  d
                  x
                
              
              )
            
            2
          
          +
          
            
              (
              
                r
                -
                
                  z
                  ′
                
              
              )
            
            2
          
        
      
    
  

wherein x and y represent an initial two-dimensional plane coordinate of the feature point; z represents an initial three-dimensional elevation of the feature point; xf and yf represent the corrected two-dimensional plane coordinate of the feature point; dxf and dxf represent the corrected displacement of the feature point along the two directions of the two-dimensional coordinate system; Q(x, z) represents an X coordinate of an orthographic point corresponding to the feature point represented by x and z; Q(x+x,z′) represents an X coordinate of an orthographic point corresponding to the feature point represented by x+dx and z′; and R represents the radius of curvature of the arc-shaped cylindrical surface of the curved table.