Patent ID: 11892345
Assignee: NEUBREX, CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 2:
3. A method for detecting and specifying a vibration on the basis of a feature of a fiber-optic signal to determine a time and a spatial location comprising:
Step 1 of acquiring a feature-expanded function vector and C-number of vibration categories by expanding a feature of initial data of a vibration signal from a distributed fiber-optic sensor;
Step 2 of calculating a dimensionality reduction matrix based on the feature-expanded function vector;
Step 3 of acquiring a dimensionality-reduced feature function by operating the dimensionality reduction matrix to the initial data and the feature-expanded function vector;
Step 4 of acquiring a primary classification result of the vibration signal by performing a classification with reference to a primary classification parameter acquired from a parameter database; and
Step 5 of acquiring and outputting a secondary classification result of the vibration signal by performing removal of a wrong detection result and correction of a wrong classification result of the primary classification result, wherein
Step 5 includes:
Sub-step 51 of converting the primary classification result represented by the following Equation 8 to a logical variable represented by the following Equation 9;
Sub-step 52 of calculating, for each vibration category, a score of B-number of whole logical equations {J1(L), J2(L), . . . , JB(L)} in a logical rule base on the basis of a calculation equation represented by the following Equation 10; and
Sub-step 53 of outputting a vibration category corresponding to a highest score represented by the following Equation 11 as an output of a secondary classifier,, Primary
      ⁢
         
      Classification
      ⁢
         
      Result
      : 
       
      
       e
       ⁡
       (
       
        t
        ,
        d
       
       )
      
     
     ,
    
   
   
    
     (
     
      Equation
      ⁢
         
      8
     
     )
    
   
  
 

 
  
   
    
     
      Logical
      ⁢
        
      Variable
      : 
       
      
       L
       
        m
        ,
        n
       
       
        (
        t
        )
       
      
     
     =
     
      {
      
       
        
         
          1
         
         
          
           
            if
            ⁢
               
            
             e
             ⁡
             (
             
              
               t
               -
               m
              
              ,
              
               d
               -
               n
              
             
             )
            
           
           ==
           i
          
         
        
        
         
          0
         
         
          otherwise
         
        
       
       ,
      
     
    
   
   
    
     (
     
      Equation
      ⁢
         
      9
     
     ), where, in Equation 9, Lm,n(i) denotes a logical variable when a fiber-optic signal at a time (t−m) and a location (d−n) is determined to be a vibration of category i in Step 4,, Calculation
       ⁢
          
       Equation
       : 
       
        
         s
         (
        
        
         c
         )
        
       
      
      =
      
       
        
         ∑
          
        
        
         b
         =
         1
        
        B
       
       ⁢
       
        
         J
         b
        
        (
        L
        )
       
       ⁢
       
        s
        b
        
         (
         c
         )
        
       
      
     
     ,
    
   
   
    
     (
     
      Equation
      ⁢
         
      10
     
     ), where, in Equation 10, s(c) denotes a score on the basis of the whole logical equations in the logical rule base when the current vibration belongs to category c, the input L in Jb(L) configures all the logical variables Lm,n(i), the subscript b denotes the b-th logical equation, and sb(c) denotes a contribution degree to a score in each vibration category when the logical equation Jb (L) is established,, Vibration
     ⁢
        
     category
     ⁢
        
     corresponding
     ⁢
        
     to
     ⁢
        
     a
     ⁢
        
     highest
     ⁢
        
     score
     :
    
   
   
    
     (
     
      Equation
      ⁢
         
      11
     
     )
    
   
  
 

 
  
   
    e
    *
   
   (
   
    t
    ,
    d
   
   )
  
  =
  
   arg
   
    max
    c
   
   
    
     s
     
      (
      c
      )
     
    
    .