PID temperature control method and temperature control module

Abstract

The invention discloses a PID temperature control method that employs the follow-up control-based temperature-increasing and/or temperature-decreasing process. The method specifically comprises the steps of presetting a temperature/time curve, obtaining the temperature measurement value of a controlled object at the current time, calculating a temperature target value at the current time according to the temperature/time curve, conducting the PID operation according to the temperature measurement value and the temperature target value at the current time, and adjusting the output power according to the result of the PID operation so as to complete the power adjustment at a time. The invention also discloses a PID temperature control module. The PID temperature control module comprises a temperature measurement value acquisition unit, a follow-up control temperature target value calculation unit, a PID operation unit and an output unit. According to the technical scheme of the PID temperature control method and the PID temperature control module, the temperature-increasing and temperature-decreasing process is controlled in the follow-up control manner. Therefore, the temperature can be increased or decreased at a constant speed according to a well designed temperature increasing/decreasing curve. The heating power is controlled to fluctuate within a relatively small range. The temperature error caused by the large inertia can be reduced. Meanwhile, the accuracy of temperature control is improved.

Description

technical field [0001] The invention relates to the technical field of temperature control, in particular to a PID temperature control method and a PID temperature control module. Background technique [0002] In the control process, temperature is an important parameter that affects the process, so it is necessary to control the temperature more accurately, and in many cases not only the precise control of the heat preservation process, but also the precise control of the heating and cooling process is required. [0003] At present, the temperature control is often done manually. During the control process, the operator judges the size of the control amount and the operation time based on experience according to the size of the temperature error, the direction of change and the speed of change. Although manual control can get a better control effect, whether it is heating, cooling, or heat preservation process, it may last for a long time, which will increase the operating ...

AI Technical Summary

Problems solved by technology

[0008] The technical problem solved by the present invention is the problem of large overshoot and long adjustment time when the existing PID

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