Device and method for graphite electric hot plate temperature control

Abstract

The invention relates to a device and method for graphite electric hot plate temperature control. A master controller module is respectively connected with a temperature collecting module, a temperature control module, a key module, a display module, a warning module and a power module. The power module is further connected with the temperature collecting module, the temperature control module, the key module, the display module and the warning module. The temperature collecting module comprises an anti-interference auxiliary circuit which offers stable supply voltage and reference voltage to a temperature measuring signal adjusting amplifying chip. Two power sources are designed for the power module and the power module offers power to the temperature control module and other modules. On the basis of the PWM technology, the sectional type digital PID algorithm and the integral saturation resistant PID algorithm are adopted so that the temperature control over a graphite electric hot plate can be achieved; a relay is prevented from being frequently turned on and turned off according to the sectional type digital PID algorithm, so that the service life of the relay is prolonged; damage caused by integral saturation is overcome through the integral saturation resistant PID algorithm, so that the temperature control balance time is shortened.

Description

technical field [0001] The invention relates to the field of automatic control of instruments and equipment, and in particular provides a temperature control device and a control method for a graphite electric heating plate. Background technique [0002] There are various electric heating plates for laboratory use, among which graphite electric heating plates are the most popular among consumers. The graphite electric heating plate has a panel made of high-purity graphite material resistant to acid, alkali and high temperature, which is specially tailored for the laboratory; it has a large heating area and can process multiple samples at the same time; the temperature of each heating point is uniform; the heating speed is fast; durable, As industrially used for heating, it also has the characteristics of long continuous working time and can work continuously for more than 48 hours. However, the graphite electric heating plates currently on the market use ordinary temperatur...

AI Technical Summary

Problems solved by technology

However, the graphite electric heating plates currently on the market use ordinary temperature controllers, which have defects such as inaccurate temperature measurement, limited temperature measurement range, simple temperature control algorithm, and long temperature control equilibrium time.

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