To measure the horizontal displacement caused by the deformation of the mine shaft
a capacitive displacement sensor which can conduct non-contact measurement was designed
by using AD7745
based on CDC technology.The structure of measuring electrode was designed.To improve anti-interference capability
the shell was shielded.High precision measurement was achieved by setting AD7745 internal registers through software design.The experimental results show that the measuring precision can reach 0.1 mm at range of ±10 mm.