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With the era of development and progress of science and technology, the temperature as a parameter closely related to people's lives, its monitoring and control technology has been widely used in various fields. Virtual instrument technology in the late 1980s emerged, compared with the traditional instrument, the virtual instrument has a more feature-rich, faster processing speed and efficient measurement, the advantages of better scalability, virtual instrumentation as computer technology and modern instruments the product of the combination of technology, a revolutionary breakthrough in the traditional test theories and methods of measurement. For accurate measurement and control of temperature, the papers will be traditional thermocouple technology, state-of-the-art virtual instrument and microcontroller technology to combine design a feature-rich, high measurement efficiency, scalability Thermometer used in phosphate production line. The paper first introduces the purpose and significance of the subject, as well as the present research status quo, according to the trends of the modern temperature measurement and control instrumentation to determine the research and design ideas. Based on the various advantages of the virtual instrument, as the core software development platform for the paper-LabVIEW, and according to its own characteristics discussed in detail the design and implementation of the system. In the same time, the paper describes the advantages and features of the CAN bus, its functions to achieve the purpose of multi-node and the remote control of the system in a production environment. Phosphate production line of auto parts, the system oven temperature of the object of study, the design of the overall system design requirements of intelligent features, according to the overall design of the program, part of the hardware and software components of the temperature measurement and control instrumentation introduced . Among them, the hardware portion comprises based on the temperature data collection portion of the microcontroller, the temperature control circuit portion, the communication module portion and a display and alarm section, to achieve the control of the access and real-time temperature data; software part by LabVIEW, including LabVIEW serial communication modules, the communication between LabVIEW and database, and host computer interface design, to achieve the system host computer interaction and lower machine, database and operating personnel. Finally, the paper analyzes the traditional PID control based on genetic algorithm PID control their own characteristics, combined with LabVIEW and MATLAB software to design a PID controller based on genetic algorithms and system simulation, the simulation results are compared. According to the system run results prove, this design can achieve accurate control of the temperature of the ovens, and can improve the control precision, MATLAB simulation and modeling of the initial temperature data automatically selected PID tuning parameters and range in Human-Computer Interaction The interface has reached more intuitive and aesthetic purposes.
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