Patent ID: 11953635
Assignee: INSTITUTE OF GEOLOGY AND GEOPHYSICS, CHINESE ACADEMY OF SCIENCES
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 8:
9. The seismometer with high sensitivity, broadband and all-dip according to claim 8, wherein an electromechanical equation of a velocity seismometer in the seismometer after the all-dip broadband seismometer method based on dip angle perception is:, {
  
   
    
     
      
       
        m
        ⁢
        
         x
         ¨
        
       
       +
       
        c
        ⁡
        (
        
         
          x
          .
         
         -
         
          w
          .
         
        
        )
       
       +
       
        k
        ⁡
        (
        
         x
         -
         w
        
        )
       
       +
       
        
         G
         s
        
        ⁢
        
         I
         s
        
       
       +
       
        
         G
         a
        
        ⁢
        
         I
         a
        
       
       +
       
        
         G
         b
        
        ⁢
        
         I
         b
        
       
      
      =
      0
     
    
   
   
    
     
      
       
        G
        b
       
       ⁢
       
        I
        b
       
      
      =
      
       mg
       ⁢
         
       sin
       ⁢
       θ
      
     
    
   
   
    
     
      
       
        G
        a
       
       ⁢
       
        I
        a
       
      
      =
      
       
        
         (
         
          
           g
           p
          
          +
          
           
            g
            i
           
           s
          
          +
          
           sg
           d
          
         
         )
        
        ⁢
        
         V
         0
        
       
       +
       
        mg
        ⁢
          
        cos
        ⁢
        θ
       
      
     
    
   
  
 

wherein, m represents the mass of the mass block, {umlaut over (x)} represents the second derivative of the mass block position, {umlaut over (w)} represents the second derivative of the surface displacement, k represents the spring coefficient, c represents the damping amount of the damper, x represents the mass block position, w represents the surface displacement, Gs represents the induction coil that senses the mass block displacement, Is represents the induced current generated by the seismometer due to the vibration displacement, Ga represents the feedback coil that is offset in the vertical direction, Ia represents the feedback current generated by the PID feedback circuit, Gb represents the feedback coil of horizontal direction cancellation, Ib represents the feedback current generated by the PID feedback circuit, g represents gravitational acceleration, θ represents an inclination angle of the current seismometer, and gp, gi and gd represent the feedback parameters, and V0 represents the voltage value output by the seismometer.