Diseño de un prototipo para la implementación de un sistema de monitoreo de vibración e inclinación de un puente mediante una red de sensores inalámbricos.

Abstract

A prototype for implementing vibration monitoring and tilt of a bridge was designed by means of wireless network to prevent incidents or accidents associated with the movement insecurity of the structure caused by lack of maintenance, poor construction or useful lifetime bridge. The network operates on the IEEE 802.14.5 (ZigBee) protocol is composed of tree nodes: the coordinator node and two sensory nodes. Sensory nodes detect and transmit wirelessly vibration values and tilt of the bridge structure to the main node named Coordinator, which through its serial port allows to process information to the user interface created in MatLab. The devices used in the nodes were: Arduino MEGA 2560 plate, the communication radios XBee S2, the Shield XBee and connecting cables. An SD card was added to the coordinator node and the Shield necessary to be used; each sensor node ADXL335 accelerometer, the SW – 420 module for vibration control, a 9-volt lithium battery and a mini breadboard. Field tests were carried out on bridges which structure is concrete, located in Cantons Penipe and Chambo in the province of Chimborazo, the operation of the prototype object of study was tested in peak and off-peak hours to detect by vehicular circulation changes in the values detected by booth sensors. Data collection was performed for an hour, in ten-minute intervals, from which five minutes are data collection and the other five are non-stop times. The results obtained were plotted using free software R, obtaining an interpolation graphic demonstrating that the operation of the device fulfills the purpose for which it was designed.