Method and device for measuring dip angle of oppositely crossly placed paired quartered ring-quartered circle nested polar plates

A method for measuring dip angle by way of oppositely crossly placed paired quartered ring-quartered circle nested polar plates, wherein the method comprises the following steps:

• (1) one round metal plate and one outer circular-ring-shaped metal plate are placed coplanar and concentric with one another, and the round metal plate and the outer circular-ring-shaped metal plate are quartered in the radial direction respectively to obtain four quarter round metal plates and four quarter circular-ring-shaped metal plates, and a quarter round metal plate and a quarter circular-ring-shaped metal plate corresponding to the same sector angle forms a capacitor, an annular coplanar capacitance measuring head is obtained by combining the four quarter round metal plates and four quarter circular-ring-shaped metal plates;
• (2) the two annular coplanar capacitance measuring heads as described above are vertically immerged into the insulating liquid, with the two annular coplanar capacitance measuring heads being placed coaxially and oppositely and a quarter round metal plate and a quarter circular-ring-shaped metal plate of the two annular coplanar capacitance measuring heads being both crossly distributed, and the liquid surface of the insulating liquid passes through the center of the two annular coplanar capacitance measuring heads, and the capacitance value of the capacitor formed by a quarter round metal plate and a quarter circular-ring-shaped metal plate corresponding to the same sector angle is codetermined by the dielectric constant of air, the dielectric constant of the insulating liquid, a corresponding sector angle of a portion of respective polar plate that is exposed to the air, and a corresponding sector angle of a portion of the respective polar plate that is immerged in the insulating liquid;
• (3) when the above two annular coplanar capacitance measuring heads rotate circumferentially around the center, its dip angle changes and the liquid surface of the insulating liquid maintains horizontal, and the relative positions of the two annular coplanar capacitance measuring heads and the insulating liquid change, and a corresponding section angle of a portion of the respective polar plate that is exposed to the air and a corresponding sector angle of a portion of the respective polar plate that is immerged in the insulating liquid change, and a dip angle value is calculated by measuring changes of the capacitance values of the capacitor formed by a quarter round metal plate and a quarter circular-ring-shaped metal plate corresponding to the same sector angle;
• (4) the two annular coplanar capacitance measuring heads rotate circumferentially around the center, and when the liquid surface of the insulating liquid is near to the radial dividing line of any one of the annular coplanar capacitance measuring heads, the calculated result obtained by another annular coplanar capacitance measuring head is taken as the final calculated value of the dip angle.