Calibration Of Resonance Demodulation And Its Mathematical Physical Equation

Linear systems with the same mathematic models but different characteristics based on differential equations of linear systems are researched. The same excitation signal has the same response result. The equivalent analog of two-order mechanical systems and two-order electronic systems is constituted; through the comparison between the two systems with different characteristics, the physical meaning of electronic-resonance device in resonance demodulation detection system is analyzed.The dimension system of the transfer function of linear systems are constituted based on the physical quantities of excitation signal of linear system and that of the response signal. The physical quantity of system response signal is deduced according to the physical quantity of system excitation signal and the dimension system of the linear system transfer function, and the dimension research of output quantity SV-value in resonance demodulation detection system is finished. Finally, when it comes to conclusion, L is included in the dimension of SV-value. The system simulation model based on stated parameters of resonance demodulation detection system and the physical meanings of the systems and the transfer functions of those is established. The system simulation is performed applied MATLAB SIMULINK, and it comes to the conclusions that the simulation curves of relative physical quantities of shock pulse and SV-value are produced. The mathematical physical equation of classic physical quantities of shock pulse and SV-value is constituted according to polynomial curve assimilation. The unit of SV-value is deduced based on the mathematical physical equation,and it is m·s^-2·us².The micro-shock is the stated reference standard of the resonance demodulation detection system measurement according to the traceability fundamentals of metrology. It is formed by the drop-ball shock test-bed. The drop-ball shock test-bed is manufactured to produce micro-shock pulse that is controllable, computable and upping to the requests. The sensitivity coefficient calibration formulae and test equipment of resonance demodulation detection system are constituted. Making using of it, the drop-ball shock experiment is performed with the standard resonance demodulation detection system. The acquired experiment data is used to calculate the calibration value of standard system sensitivity coefficients. The function of SV-value unit that is deduced in this paper and SV that is unit used widely in project is constituted.The accomplishment of the research project has its practical meaning. It makes the resonance demodulation system can realize quantitative detection with uniform standards. The research results are added to the resonance demodulation theory as new contents. The relationship between the output SV-value and classic physical quantities is annotated and the measurement calibration equipment is build; it can deepen the resonance demodulation technology in which china has achieved the world advanced level and also the national standard can be established based on the research results. Its direct application value is that it can promote the progress of fault diagnosis and provide safeguard conditions.