Device and method for improving temperature control precision

Abstract

The invention discloses a device and method for improving temperature control precision, corresponding closed-loop control is added on the basis of open-loop control to carry out heat dissipation loss heating compensation, dynamic balance of system heat is guaranteed, constant-temperature and constant-speed control is achieved, and the temperature control precision is improved. The device comprises a container for bearing a medium, a heating disc for heating a medium is arranged at the bottom of the container, the container is provided with a temperature sensor for monitoring the temperature of the medium, the temperature sensor is in communication connection with a controller, and the controller comprises an open-loop control unit and a closed-loop control unit; the heating disc comprises an open-loop control load and a closed-loop control load, the open-loop control load is connected with the open-loop control unit, the closed-loop control load is connected with the closed-loop control unit, and the controller is electrically connected with a power supply for supplying power to the device; or the heating disc only comprises one load, the load is respectively connected to the open-loop control unit and the closed-loop control unit, the open-loop control unit is electrically connected with the first power supply, and the closed-loop control unit is electrically connected with the second power supply.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a device and method for improving temperature control accuracy. Background technique [0002] With the development of science and technology, automatic control systems are used more and more widely, but how to achieve higher precision control through existing technologies and devices has always been the key to its popularization and application. In real life, there are control systems for various physical quantities such as temperature, speed, and concentration. In the most common temperature control, the controlled objects include various objects or a certain space, such as: an automatic temperature control system for heating water by an electric heating plate , the system mainly consists of three parts: temperature sensor, heating load and controller. The temperature sensor provides the detection data to the controller in real time, and the controller sends instructio...

AI Technical Summary

Problems solved by technology

Therefore, in theory, without considering the heat dissipation loss, the 143W electric heating rod can also be used to continuously heat in an open-loop control mode to achieve the goal of a constant temperature rise of 2°C / min, but in fact there is an inevitable Heat dissipation loss, and as the temperature rises, the heat dissipation loss continues to increase, and it is also necessary to continuously increase the supplementary heat to achieve thermal balance, so heat dissipation compensation becomes the key to affecting the temperature control accuracy

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