Measurement and control system with discriminative tracking for temperature of high-temperature resistance furnace and monitoring method thereof

Abstract

The invention relates to a measurement and control system with discriminative tracking for the temperature of a high-temperature resistance furnace and a monitoring method thereof. The invention comprises the following steps: symmetrically and uniformly dividing a heating space of a hearth of the high-temperature resistance furnace into a plurality of heating subareas, arranging a resistance heating element in each subarea, and arranging a main loop unit of a heating power supply, a high and low temperature discriminative measuring and transmitting unit, and a high and low temperature control loop unit in each heating subarea in a matching way. The high and low temperature discriminative measuring and collecting mode of the measurement and control system overcomes the defect that wiring and signal types cannot be complementary to each other caused by different signal types of high and low temperature measurement in instrument control, and by using an undisturbed switching method with a threshold value, a power regulator can smoothly and continuously output control signals in high and low temperature switching so as to eliminate mutations, jumps and discontinuity of the control output due to different temperature measurement means and ranges for high and low temperatures, and improve the accuracy and reliability of single-area temperature control.

Description

technical field [0001] The invention relates to a high-temperature resistance furnace temperature difference tracking measurement and control system and a monitoring method thereof. Background technique [0002] The high temperature resistance furnace is different from the conventional resistance furnace. It usually uses graphite and other composite materials as the heating body, and the ultra-light refractory high-temperature energy-saving material is used as the furnace lining. It is equipped with vacuum, water cooling and temperature control systems to achieve temperatures above 1700°C and the maximum temperature can reach 3000°C. The production process of heating and heat treatment is widely used in aerospace, machinery, manufacturing, new materials and other fields. [0003] Most of the existing high temperature resistance furnace temperature control systems are limited by factors such as high and low temperature measurement methods and signal types, directly using high...

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Problems solved by technology

[0003] Most of the existing high temperature resistance furnace temperature control systems are limited by factors such as high and low temperature measurement methods and signal types, directly using high temperature thermometers for temperature control, and the heating speed and power output of the middle and low temperature sections cannot be accurate and real-time Control, especially for the production heat

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