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Water Level Control Using PC
Michael Kelly & Sun Y. Kim
Advisor: Dr. I.S. Ahn

In today's modern manufacturing environment, controlling the flow rate of fluids into and out of tanks, as well as the quantity in the tank at any given time, is essential. Utilizing a combination of controls, electronics, and software, an effective means of level regulation has been devised. 

Control of the plant uses a combination of, solenoid valves to control flow rates in and out, flow meters that precisely determine the amount of fluid transferred, level sensors to provide a means of determining quantized water level, and the recently marketed M68hc11 microcontroller to compute and generate control inputs. A combination of fault detection warning of system malfunction and PID control algorithm is used to adjust the duty cycle of solenoids to maintain level control. A computer terminal is used to interact with the system, download software into the microcontroller and provide input/output information on a CRT. The system is designed for an operating temperature of 0o to 180o F.

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