Aiming at requirement of high precision temperature control of stationary temperature water tank

a novel intelligent control system of constant temperature water tank is designed and implemented. The system uses MSP430 MCU as control core

Pt 100 platinum resistance as temperature measurement devices

thermo-electric cooler（ TEC） devices as refrigeration components. Combined with proportion-integration-differentiation（ PID）algorithms and pulse-width modulation（ PWM） control to achieve precise control for temperature of the target object. Temperature control system test range is set to 0

50 ℃

and performance test results of the prototype show that the system can realize temperature control requirements of pre

cision prior to ± 0. 05 ℃

with a resolution of± 0. 01 ℃ and a temperature control precision of ± 0. 2 ℃. Practical application show that this temperature control system has high reliability

high control precision

stable performance

easy operation

and high universality

so it has high practical value and application promotion value.