基于单片机的自动给水系统

The Design Base On MCU for Pressure Water Supply SystemAbstractBuilding the conservation-oriented society,the reasonable development,saves and theeffective protecting water resources is an arduous task.According to the users water usedtime and the water consumption changing characteristic,so the resident original watersupply system has many problems.E.g.the existence cost to be high,the reliability is low,the water resources waste,and the pipe network system need consummation.Through theway of using pressure feedback,PID control,together with the converter,microcontroller,pressure sensors,etc,according to the network management pressure,control water pumprotational speed through the inverter.So that the pressure in the pipe network is alwaysmaintained at a appropriate scope.Through this way,we solve the problem that the highfloor case inadequate pressure and energy consumption high when the flow is lowMoreover the water pump consumes the electric power and the electric machineryrotational speed is proportional three cubed the relations,therefore the water pump velocitymodulation gets an obvious energy conservation effect.The average power consumptionsaves 40%than usual water supply method.Combination of relays,it can achieve the mainpump frequency adjust,the deputy pump soft start,with the function of short circuitprotection and over current protection.It is stable and reliable further more greatly extendthe life of the motor.Key words:constant pressurefrequency conversion water supplySCMdifferential pressure water supplyautomatic control