Diseño y construcción de un sistema de control de temperatura y caudal para un sistema de bombeo de agua.

Abstract

The design and construction of a temperature and flow control system for a water pumping system was performed. For the development of this work was investigated about AC/AC converters, configuration and programming language of the Arduino board, electronic devices, serial communication between the Arduino plate and Matlab software in addition to implement the Automatic control system using a reprogrammable Arduino printed circuit board, the same one that is in charge of the reception of the signals generated by the sensors and the sending of signals for the actuators drive. To measure the physical variables of flow and temperature, a flow sensor and a NTC thermistor were used, as a means of activating the heating resistances TRIAC thyristors were used. Once the elements were determined using the Arduino IDE, the programming of the AC/AC converters called: Control ON OFF, Phase angle control and Chopper control were performed. The same ones that determine the cuts that must be carried out in the alternating current waves in order to turn on or off the heating resistors. Subsequently, to tune the temperature control system in each AC/AC converter the temperature values were acquired using Matlab software, The same that determines the function of transfer of the system and by means of its tools of simulation and symphony "PID Tuner/Matlab" we obtain the values of Kp, Ki and Kd, that represent the constants of the integral proportional control derivative; the same that will be in charge of maintaining the value of the temperature according to what is needed. In order to identify the control technique generated by optimum performance, a comparison was made between the AC/AC converters with their respective PID controllers. Once it was realized comparing the AC/AC converters It was possible to verify that the direct phase controller generates higher efficiency than the ON-OFF controller. Before to the manipulation of the module a correct familiarization of the use of all the elements that has been used in the development of this work is recommended.