Patent ID: 11898453
Assignee: XI'AN JIAOTONG UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC F  G | IPC F  G

Claim 1:
2. The method according to claim 1, wherein in the first step (S1), the single blade tip timing sensor collects the arrival time t of each blade, and a difference between theoretical arrival time and the actual arrival time is converted into a blade tip displacement according to the rotational speed fr and the blade length R of the blade, and an expression is as follows: x(ti,j)=2πR·fr·(ti,j−ti,j), where ti,j represents the actual arrival time of an i-th blade at a j-th turn; ti,j represents the theoretical arrival time,, t
     _
    
    
     i
     ,
     j
    
   
   =
   
    
     60
     ·
     
      (
      
       
        θ
        i
       
       +
       
        a
        k
       
      
      )
     
    
    
     2
     ⁢
     π
     ⁢
     n
    
   
  
  ,, where θi represents an angle of the i-th blade based on amounting position of a rotational speed sensor, αk represents an angle of a k-th sensor based on the mounting position of the rotational speed sensor, n is the rotational speed, and x(ti,j) represents the displacement of the ith blade at the j-th turn and at time ti,j.