The Reliability Analysis Research Of The DC Sensor Based On Magnetic Potential Self-balance And Feedback Compensation

The accuracy and reliability of the heavy DC measurement devices have great economic effect on the electrometallurgy and electrochemistry industry. Based on the research of the theory of the DC sensor based on magnetic potential self-balance and feedback compensation, the basic principles and methods about reliability analysis are discussed systematically in this thesis, and the reliability analysis research on the DC sensor is processed. Firstly, in chapter 2 of this thesis, a fire-new heavy DC sensor theory, which 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. Both the merit of the accuracy, linearity, anti-interference which based on the principle of DC closed-loop measurement and the merit of the simple circuit, high precision, good stability which based on the principle of DC open-loop measurement are the characteristics of the fire-new sensor. Secondly, in chapter 3 of this thesis, the basic principles and methods on reliability analysis are discussed. Reliability is the best quantitive measure of the integrity of a designed component, product or system. Reliability engineering provides the theoretical and practical tools whereby the probability and capability of components, products, or systems to perform their required functions without failure in specified environments for desired periods under specified conditions, can be specified, predicted and designed. Then, in chapter 4 of this thesis, the reliability analysis on the DC sensor based on magnetic potential self-balance and feedback compensation is processed. The reliability model of the DC sensor is presented, and the failure mode analysis of the DC sensor is processed. The reliability prediction of the DC sensor is processed based on the reliability model of the DC sensor. The MTBF (Mean Time Between Failures) of the DC sensor reaches over 13000 hours, and its reliability of 100 hours working without failures approaches 99.2%. From the view of improving the system reliability, the reliability design of the DC sensor is discussed. The research is summarized in the end of this thesis.