关键词：单片机 调节流量 稳定PH值
Title The Controlling System of The Waste Water
Abstract
This controlling system of the waste water neutralizes ph value makes the ph value which is produced by the way that carbide dregs neutralize the acid waste water of given rate of flow stabilized around 7 by controlling the rate of flow of the carbide dregs .The system is core of hardware is MCS-51microcomputor，Its controlling process is the signal which come from the measure of ph and rate of flow change by I/V, and send the signal to 8031,because the signal is small , and magnify it by 4558.At last, we send the signal which will be changed by V/I to the valve, thus it can control the rate of flow and convenient for stabilizing the ph value.
The system uses serial controlling system, the small annuals controls the rate of flow of the carbide dregs，the big annuals controls the ph value, the time are one minute and four minutes.
It can sample the carbide dregs rate of flow ,later it will show the ph value .If the showing of ph value fluctuates strong around 7,we can gear correspondingly the carbide dregs rate of flow ,which make ph value stabilized around 7,thus it can be better .
Keywords ：Single-Chip，control the rate of flow ,stabilize the ph value
