| The accuracy and reliability of the heavy DC metrical devices have great effect on the electrochemistry and electrometal factory. Based on the status and development of the heavy DC measurement all over the world, a fire-new DC sensing theory based on magnetic potential self-balance and feed-back compensation is discussed systematically in this thesis.Firstly, in chapter 2 of this thesis, a fire-new heavy DC sensor theory, DC sensor based on magnetic potential self-balance and feedback compensation, has been put forward based on the research of basic principles about traditional DC transducer and two-way magnetic magnifier. This DC sensor combines organically merits and complements of DC transducer and two-way magnetic magnifier together. The characteristics of the system are: simple construction, high precision, good stability and reliability. In chapter 3, it is established that the mathematical model of heavy DC sensor based on magnetic potential self-balance and feed-back compensation. Furthermore, the stability of them has been analyzed through computer simulation in MATLAB. The simulation results proved that the DC sensor has excellent stability and practicability.Then, in the chapter 4, the system stability and transient state performance analysis are discussed. By analysing the stability and transient performance of the magnetic potential self-balance loop, the characteristics of the system are illuminated, namely high precision (the error less than 0.1%), good stability and reliability, good compensation performance and quick response time.Finally, in chapter 5, it is introduced that frequency spectrum analysis of DC sensor based on magnetic potential self-balance and feedback compensation. Current wave equation of magnetic potential self-balance loop during a cycle is given. Its frequency spectrum is analyzed. It is theory foundation for us to choice the size of inductor.The research is summarized in the end of the thesis.
|
PDF Full Text Request