A design method of measuring system for micro-force value is introduced.Self-designed sensor structure is used to make full use of a cylindrical capacitance sensor range

linear

the edge of the characteristics of small effect and so on

a straight line is used through the high-precision bearings to ensure the movement of coaxial

and other methods of shield capacitance are used to eliminate the interference.Detection circuit through the new high-precision

integrated capacitance-to-digital converter and the AD7747 single-chip processor are used to achieve accurate measurement of dC changes in the volume while reducing the cost of the system.The experiments conclude that the method for the following 10-5N power source and measuring the value provides an effective solution.