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自动控制系统在各个领域尤是工业领域有着极其广泛的应用,温度控制是控制系统中最常见的控制类型之一。而随着单片机技术的飞速发展,通过单片机对被控对象进行控制成为今后自动控制领...
自动控制系统在各个领域尤是工业领域有着极其广泛的应用,温度控制是控制系统中最常见的控制类型之一。而随着单片机技术的飞速发展,通过单片机对被控对象进行控制成为今后自动控制领域的一个重要发展方向,本设计即利用单片机对电阻炉的炉温进行自动控制,使用热电偶作为温度传感器把热信号转变成电信号,电信号在经过放大,经过模数转换再输入到CPU。控制器采用PID控制算法。温度控制的原理是通过调整晶闸管的导通时间来调节加热主电路的有效电压,从而达到温度控制的目的。系统由AT89C51单片微机、温度传感器AD590、A/D转换器ADC0809、键盘及显示电路、晶闸管触发电路及电源电路等组成的控制器和被控对象电阻炉构成一个闭环控制系统。系统控制程序采用模块化设计结构,主要包括主程序、中断服务子程序等。系统采用过零触发等技术,省去了传统D/A转换元件,简化了电路,并提高了系统的可靠性。同时,系统可以实时控制电阻炉的实际温度。
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Automatic control system, especially in the fields of industrial area is a extremely extensive application, the temperature control is the control system is the most common type of control. With the rapid development of technology, through the SCM control object to be accused of automatic control field in an important developing direction of the design, namely on the microcontroller resistance furnace temperature for automatic control, use as the hot temperature sensor thermocouple signal into electrical signals, signal in frequency-field amplified again after input to the CPU. Controller PID control algorithm. The principle of temperature control is by adjusting the thyristor conduction time to adjust the effective voltage circuit heating temperature control, so as to achieve the goal. By AT89C51 single chip microcomputer system, the temperature sensor AD590 to, A/D converter ADC0809, keyboard and display circuit, thyristor trigger circuit and power circuit components of controller and controlled object resistance furnace constitute A closed-loop control system. The modularized design system control structure, including the procedure, the interrupt service procedure, etc. System adopts zero trigger techniques, save the traditional D/A transformation components, simplify the circuit, and improve the system reliability. At the same time, the system can real-time control of the actual temperature resistance furnace.
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Automatic control systems in various fields in the industrial field in particular has an extremely wide range of applications, temperature control is the control system of one of the most common type of control. With the rapid development of microcomputer technology, the single chip microcomputer to control the controlled object as a key area for future development of automatic control the direction, the single chip design that is used on automatic control of furnace temperature resistance furnace, using the thermocouple as a temperature sensor the thermal signal into electrical signals, electrical signals, after amplification, after analog-digital conversion and then entered into the CPU. Controller with PID control algorithm. The principle of temperature control is by adjusting the thyristor conduction time to adjust the effective heating voltage main circuit, so as to achieve temperature control. AT89C51 single-chip computer system by the temperature sensor AD590, A / D converter ADC0809, keyboard and display circuit, thyristor trigger circuit and power circuit composed of resistance furnace controller and controlled object form a closed loop control system. System control program uses a modular design structure, including the main program, interrupt service routines and so on. System with zero trigger techniques, eliminating the traditional D / A converter components, simplifying the circuit and improve the reliability of the system. At the same time, real-time control system the actual temperature resistance furnace.
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Automatic control system, especially in the fields of industrial area is a extremely extensive application, the temperature control is the control system is the most common type of control. With the rapid development of technology, through the SCM control object to be accused of automatic control field in an important developing direction of the design, namely on the microcontroller resistance furnace temperature for automatic control, use as the hot temperature sensor thermocouple signal into electrical signals, signal in frequency-field amplified again after input to the CPU. Controller PID control algorithm. The principle of temperature control is by adjusting the thyristor conduction time to adjust the effective voltage circuit heating temperature control, so as to achieve the goal. By AT89C51 single chip microcomputer system, the temperature sensor AD590 to, A/D converter ADC0809, keyboard and display circuit, thyristor trigger circuit and power circuit components of controller and controlled object resistance furnace constitute A closed-loop control system. The modularized design system control structure, including the procedure, the interrupt service procedure, etc. System adopts zero trigger techniques, save the traditional D/A transformation components, simplify the circuit, and improve the system reliability. At the same time, the system can real-time control of the actual temperature resistance furnace.
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