【作者】 田星；

【导师】 魏国；

【作者基本信息】 哈尔滨工业大学 ， 仪器科学与技术， 2010， 硕士

【摘要】 伴随着经济的高速发展,高层建筑日渐增多,原有的城市供水网络逐渐显露缺陷,如在切换水泵时会出现水锤、在用水高峰期会出现供水压力下降等问题,给生活用水带来了极大的不便。针对上述情况,设计了一款以C8051f020和ATEML89S52为核心的给水控制器,通过控制一个变频器和五台水泵实现恒压供水的功能。该系统由若干模块组成,包括电源模块、开关模块、时钟模块、数据采集、数据存储、电机控制、串口通信、人机接口(参数设定和数据显示)和报警系统等模块,并且模块之间和模块与控制芯片之间均采用了抗干扰设计。软件设计以控制器C8051f020和89S52的软件设计为主,同时能够实现两控制器之间的信息交互。给水控制器以管网实际压力和设定压力为参数,通过增量式PID计算得出控制命令,控制变频器的输出频率来自动调节水泵电机的转速,并根据用水量的大小由单片机控制运行水泵数量及变频器状态,实现管网水压的闭环调节,最终达到恒压供水的目的。同时,本系统还具有消防、巡检、报警、电压电流检测、定时换泵、手动和运行图等功能,有较强的应对突发事件的能力。最后通过对硬件和整个系统的实验,证明该系统不仅能够实现给水控制器的恒压供水功能,同时还可以完成休眠等附加功能。由于设计过程中考虑到成本问题,因此能够在完成上述功能的前提下,将成本降到最低。更多还原

【Abstract】 With the rapid economic development and the large increase of high-rise buildings, current city water supply network gradually reveals shortcomings. For Example, water hammer occurs when the pumps being switched; water supply pressure drops during the peak hours, which have brought us great inconvenience.To resolve the above issues, the author designed a water supply controller with C8051f020 and AT89S52 as the core. It achieves constant pressure water supply by controlling the frequency converter and five water pumps. The system consists of several modules, including power modules, switching modules, clock modules, data acquisition, data storage, motor control, serial communication, human-machine interface (parameter settings and data displaying) and the alarm system module, etc. It adopted anti-jamming design both in between the modules and in between the control chip and the module.Software design composed mainly of C8051f020 and 89S52, can achieve information exchange between the two controllers. The controller of water supply, with the actual pipe network pressure and the set pressure as the parameter, obtains the control command through the incremental PID algorithm; automatically adjusts the speed of pump motor through control of the inverter output frequency; achieves closed-loop pipe network water pressure regulation by controlling the number of running water pumps and inverter status in accordance with the size of water micro-controller, ultimately reaches the goal of constant pressure water supply. At the same time, the system also has fire-fighting function, monitor function, alarm, voltage and current detection, pump switch at the fixed time, manual function and Run Chart function, has strong ability to respond to emergencies.Finally, the experiment on hardware and the whole system proved that the system not only can make the controller to achieve the function of constant pressure water supply but also attain additional, such as sleeping functions. Due to the cost has been taken into consideration in the design process, the system is able to complete all the above functions with the minimum cost.更多还原