Diseño e implementación de un sistema de medición de posición del péndulo del grupo de investigación GDP de la Facultad de Mecánica

Abstract

The objective of this work was to design and implement a pendulum position measurement system for impact tests of the Design and Production Research Group of the Faculty of Mechanics, through a data acquisition system to obtain position measurements in real time and energy variations (potential and kinetic) before impact. For the design of the system, a list of requirements issued by the user was started and functional diagrams were drawn up obtaining all the possible alternatives of elements and configurations of each of the modules combined by means of the morphological matrix which after the evaluation process applying the weighting method was used to determine the best alternative solution composed of a toothed belt system, position sensor (encoder), the ESP WROOM 32S module, the Raspberry Pi3 B + card and LabVIEW software. For the validation of the measurement system, the experimental data was compared with theoretical values obtained with numerical simulation of finite elements ANSYS, at different angular positions (5 °, 10 ° and 15 °). At an angular position Ɵ = 15⁰ before being released, the rectangular plate impactor has a potential energy of 405.21 J, when Ɵ = 0⁰ the kinetic energy is 370.25 J and the maximum velocity before impact is 5,03 Km / h whose errors are 5.32%, 8.12% and 3.87% respectively, compared with the numerical simulation. It is concluded that the results obtained present an error within the permissible range of 10%. It is recommended to implement an automatic system synchronized with the measurement system for lifting and releasing the impactor.