Research Of Magnetoelectric Phase Difference Type Torque & Rotational Speed Measuring System Based On DSC

Along with the progress in science and technology and the development of productive forces, torque and rotational speed measurement technology is widely applied in motor, automobile, marine transportation, diesel engine, chemical machinery, petroleum industry, metallurgy,etc. The torque and rotational speed measurement is necessary for mechanical products'development and research, test and analysis, quality test, pattern appraisal and energy conservation, security and optimized control. Therefore, the development and production of torque and rotational speed measurement system also represent the modern level of a country's basic industry and the scientific research.This paper provides an overview of the research and development of torque and rotational speed measurement system at home and abroad; then makes comparation among different torque and rotational speed measurement systems in a classifed manner; at last, a torque and rotational speed measurement system is conceptually developed with the latest DSP technology. Considering the existing problems occuring in anti-interference and rapid survey during torque and rotational speed measurement as well as new demands on survey system, this system could be compatible with magnetoelectric phase difference torque & rotational speed sensors which are widely used in domestic labs. This paper proposes solutions for real-time online detection problem in mechanically-driven system. In addition, this paper also addresses survey interference errors of magnetoelectric phase difference torque and rotational speed measurement system during motor operation driven by converter, so as to improve system ability to identify interference signals.Equipped with RS-232 interface, this system could easily communicate with PC, generate torque and rotational speed dynamic curves through the mass data sotrage and data processing results in PC.Comparing all possible feasible schemes achieved by functional modules, this paper discusses the module circuit designs within the system according to development requirements with the adoptation of Digital Signal Controllers dsPIC30F6014 manufactured by Microchip, including sensor input signal sampling and regulating circuit, power supply circuit, LCD display interface circuit, PC communication and keyboard interface circuit, etc. This measurement system implements software design...