Patent ID: 11906693
Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 8:
9. The probe according to claim 8, wherein the electrostatic feedback force F and the acceleration change Δg to be measured satisfies:, F
   =
   
    
     
      -
      
       
        4
        ⁢
        N
        ⁢
        ε
        ⁢
        h
       
       
        d
        0
       
      
     
     ⁢
     
      V
      f
     
     ⁢
     
      V
      b
     
    
    =
    
     m
     ⁢
     Δ
     ⁢
     g
    
   
  
  ,
 

in the equation, m is the mass of the proof mass, Vƒ is the feedback voltage, Vb is a DC feedback bias voltage applied to the comb finger top portions of the fixed comb fingers and provided by an external power supply, N represents the number of sets of array capacitor plates of the differential comb capacitor, c is an dielectric constant, h is the thickness of each of the movable comb fingers and each of the fixed comb fingers, and d0 is a spacing between the comb finger top portions of each of the movable comb fingers and adjacent each of the fixed comb fingers when directly facing each other.