| In order to make hot spring pools play best curative effective roles and reduce their power consumption, it is necessary to monitor and control the water temperature from all hot spring pools, let hot spring pools that have different temperature requirement keep the set temperature. Previously, the water temperature detection of hot springs is manual mode, by controlling the cold Valve to get required real-time water temperature, it is not only high labor intensity, but also low accuracy, so improvement must be done to reduce the labor intensity and improve precision. If cable control mode is used, reconstructing holiday villages will lead big labor strength and large investment.Based on the analysis of geothermal applied in hot spring combined with water temperature control principle, system with AT89S51 as control core combining with the inverter,digital temperature sensor DS18B20,radio frequency combination and LCD module, has a host and many slaves, adopts wireless two-way transmission between the host and slaves, proceeds Real-time automatic detection to each hot springs pools, through set communication protocols between the host and slaves, compiling slave's software by intelligent control algorithm, realizing on-site control, let each hot spring pools that has different temperature requirement keep its own constant temperature. The design uses fuzzy PID algorithm to overcome the influence about big inertia and delay, and finally using Matlab assistant design to verify the algorithm.Experiment and analysis show the water temperature control system with Fuzzy PID algorithm can satisfy the control requirements, controller responses fast with small overshoots and high precision, this benefits for hot spring resort's scientific management and raising the level of automation control with important practical meaning in water temperature control. The protocol of wireless communication have well extensible, can be extended to other fields, so it has a broad prospect of application. |
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