Numerical simulation of the integrated capacitive pressure gauge Based on ANSYS

Aming at the problem of contradiction between sensor installation structure and small size of the pressure gauge in the pressure test of gun chamber,a shell capacitive pressure sensor is designed.The structure and basic principles of the pressure sensor were introduced.The transient and static analysis were respectively made on shell of pressure gauge using the finite element analysis software ANSYS.Shell capacitance was fitted by the least squares method of the static analysis results,the correlation coefficient was 0.997 5.The static sensitivity curve of capacitive pressure gauge was drawn out.Dynamic experiments were done on the simulation chamber pressure generator.The chamber pressure curve was analyzed by calibration of the rising edge.The result shows that the gauge has a good non-linear characteristics.Static sensitivity increases with the increased pressure load.So the design of the case is feasible and worthy of promotion.