The Simulation And Experiment Technology Research Of The High Pressure Capacitive Sensor Based On Shell Capacitor

This paper spreads in two main points of the simulation and experiment technologyresearch of the high pressure capacitive sensor, based on shell capacitor, which is used tolife-weary taker test.On the basis of understand of pressure measuring device current research at home andabroad, and the application of simulate technology in engineering, this paper analyzed thefeasibility of the high pressure capacitive sensor which based on shell capacitor by the way ofANSYS simulation and theoretical calculation.Start with the structure of the pressure test system, base on the theory of cylinderstructure, it researched and identified the structure size parameters of the pressure measuringdevice and verified the rationality of the structure design. In order to get the parameters relateto the shell capacitor, provide basis and support for the test circuit design, calculated thechange range of the capacitance and voltage of the shell capacitor. It analyzed the distributionof the electric field of the shell capacitor, researched various factors which may influenceshell capacitor parameter, which could provide reference of structure processing andassembling accuracy control. Because of the complexity of the environment where thepressure measuring device placed and the impact load amplitude act on it is big, this articletried to explore the parameters that may adding in the test result which do not want to test.Make the calculation of the parameter used in thermal analysis as a core, obtained theresponse of the shell under dynamic high temperature load. Analyzed the mode of thepressure measuring system, obtained the natural frequency and mode of system of it. Finally,in order to get the static and dynamic characteristics of the pressure measuring device,researched the experiment equipments needed for the static and dynamic calibration.Discussed and proofed it is rational to use piston pressure gauge to calibrate the machine. Itgot the static response characteristics of the device based on the simulation results, analyzed the advantages and disadvantages when simulation bore pressure generator is used indynamic calibration. Proposed it is necessary to research simulation bore pressure generatorparticular for the pressure measuring device based on shell capacitance.