Temperature control system and method for miniature rapid temperature change experiment box

Abstract

The invention discloses a temperature control system and method for a miniature rapid temperature change experiment box, a miniature cooling system and a PTC (positive temperature coefficient) heaterare adopted as hardware, and an adaptive fuzzy PID (proportion integration differentiation) algorithm is adopted to control the frequency of a solid-state relay to control the PTC heating time, so that the temperature in a constant-temperature box body is controlled. The constant-temperature box automatically judges heating or cooling according to a set value input by a current system, so that theset target temperature is automatically and quickly reached, and the temperature control range is -10-80 DEG C. According to the system, the self-adaptive fuzzy incremental PID algorithm is used, sothat the control precision (steady-state error) of the temperature control system under large inertia and large delay is solved, and the stabilization time of the rapid temperature change control system is shortened.

Description

technical field [0001] The invention relates to a rapid temperature change test box, which is used in various industries such as electronics, chemistry, and teaching equipment. More specifically, it relates to a temperature control system for a miniature rapid temperature change test chamber, which can quickly reach the set temperature regardless of the ambient temperature. Background technique [0002] Miniature rapid temperature change test chambers are used in the fields of electronics, chemistry, and teaching equipment. At present, some thermostats use micro-compressor refrigeration systems. The equipment structure is large, the cost is high, the energy consumption is high, and the space for constant temperature is small. The application makes it very inconvenient. Other incubators on the market only perform heating control, and can only cool down through heat radiation to the outside world, and cannot quickly cool down. In addition, the current micro-incubator has pro...

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Problems solved by technology

[0002] Miniature rapid temperature change test chambers are used in the fields of electronics, chemistry, and teaching equipment. At present, some thermostats use micro-compressor refrigeration systems. The equipment structure is large, the cost is high, the energy consumption is high, and the space for constant temperature is small. The applica...

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