Desarrollo de un controlador inteligente difuso para el control de temperatura de moldes de plástico con sistema de colada caliente, monitoreada de forma remota desde la nube con herramientas IoT

Abstract

This work was carried out in order to establish and design new alternatives for Industry 4.0 systems that allow the control, monitoring and data analysis remotely, using existing equipment in the industrial market, with a self-developed web application. The design of a fuzzy controller is implemented in a Siemens S7-1200 PLC, for the control of two electrical resistors that come to be the cavities of the hot casting mold for plastic injection, these resistors are controlled by solid state relays whose control pulses are performed by the PLC. The connection to the cloud is implemented in a Siemens Simatic IoT2040 device, which is used as a gateway for the connection with a MQTT broker that is installed in a virtual instance in the Google Cloud platform, to allow the publication or subscription of data, which from a web application developed in this work allows the visualization of process variables, historical data, setpoint and system status. Finally, a plant and the control panel were built to perform the tests that allowed concluding that the connectivity of mobile devices and computers from the web application in a public contracted domain, with the temperature control system, presents an insignificant delay in real time and additionally, the fuzzy controller for the temperature system improves the response compared to the classic PID controller, so the developed project is satisfactory and allows scalability to plastic injection systems at an affordable cost and with a customized solution.