Automatic control systems are widely used in various fields, especially in industrial fields, and temperature control is one of the most common control types in control systems. With the rapid development of single-chip microcomputer technology, controlling the controlled object through single-chip microcomputer has increasingly become an important development direction in the field of automatic control in the future. This design requires the design of an electric furnace temperature control system with a single-chip microcomputer.SU1 UNIVERSAL MILLING MACHINE The temperature control system is mainly composed of four parts: temperature sensor, temperature regulator, actuator, and controlled object. Its system structure diagram. The controlled object is a large-capacity, large-inertia electric furnace temperature object, which is a typical multi-order volume delay characteristic. In engineering, it is often approximated as a second-order volume delay with pure hysteresis; due to the large capacitance of the controlled object, SCR is usually used as the actuator of the regulator.LIGHT TYPE DRILL PRESS To adjust the temperature of the heating furnace, in the industry, within the set cycle range, the circuit is turned on for several cycles, and then several cycles are turned off, and the ratio of the on-off time of the thyristor in the set cycle is changed to adjust the load. The average voltage of the terminal AC is the load power, which is commonly referred to as a power regulator or a cycle controller;The importance of brazing holding time The power regulator triggers the thyristor to turn on when the power supply voltage crosses zero, so what is obtained on the load is a complete sine wave, and what is adjusted is only the voltage cycle that is turned on within the set period Tc. Assuming that the wave number of the conduction cycle in the cycle Tc is n, and the cycle of each cycle is T, then the output power of the power regulator is P=n×T×Pn/Tc, and Pn is when the voltage in the set cycle Tc is fully passed The output power of the device.Martensitic stainless steel quenching vacuum heat treatment process
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