Diseño e implementación de un germinador de semillas : diseño e implementación de un germinador de semillas de lechuga con control de humedad.

Abstract

This Curricular Integration Paper begins with a bibliographic study of lettuce seed germination and the electronic components for sensor and actuator system. A design proposal was suggested and the prototype structure of the seed sprouter was implemented. Once the technical specifications and the seed growth requirements were defined and the construction of the structure of the prototype was carried out, the next step was to design the control actions for the humidity variable taking as a base a study of the range of operation determined for the ideal growth of seeds in a bibliographic study, the physical limitations of irrigation and the responses of the sensors. After this, the programming of the micro processing system was realized which included a Human–Machine Interface (HMI) in a screen with the purpose of having a permanent visualization of the humidity and the user being able to carry out experiments of sensors and actuators as well as entering the humidity set point. With the physical proposal of the prototype, i.e., the structure, the irrigation system and the electronic system, the seeds were sowed, in two trays, where one of them will germinate inside the prototype, and the other one will be on the exterior, to be able to realize a comparison which would permit the evaluation of the functioning of the suggested proposal and derive conclusions and recommendations for a possible implementation in a larger scale.