A Method of Automated Water Temperature Control for Large Volume Concrete
To automatically control the water temperature of mass concrete during construction,we designed an in-novative industrial control platform using the self-adaptive cascade fuzzy control algorithm based on the Technical Specification for Temperature Measurement and Control of Bulk Concrete(GB/T 51028-2015).The hardware plat-form includes a control cabinet,water mixing device,and temperature collection network,which perform the calcu-lation,execution,and collection tasks respectively.For the first time,the self-adaptive fuzzy control is applied to the temperature control of mass concrete.It integrates and combines three key parameters,namely,the temperature difference between concrete lining and surface,temperature change rate,and inlet water temperature,for two-level fuzzy reasoning.The reasoning results are then utilized to control the mixing ratio of return water and cold water through two flow valves.This ensures the production of mixed water that meets the temperature standard,which is then pressed into the pre-laid cooling pipes to regulate the concrete temperature in real-time.Modeling simulation and engineering practice have validated that this control strategy maintains the temperature difference between the internal concrete temperature and the inlet water temperature below 25 ℃,effectively suppressing the temperature rise of the concrete.The simulation shows a concrete cooling rate of 1.69 ℃/day,while in actual engineering appli-cation,the cooling rates recorded are 1.59 and 1.56 ℃/day,which are below the upper warning threshold of 2 ℃/day.Consequently,both the simulation results and the data from actual engineering support the effectiveness of this control platform.
mass concreteautomationwater temperature controlfuzzy controlsimulation of concrete tempera-ture control
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NSTL
万方数据
维普
