Banca de DEFESA: MARCELO DE SÁ COUTINHO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : MARCELO DE SÁ COUTINHO
DATE: 26/08/2021
TIME: 14:00
LOCAL: Sessão por Videoconferência - Sala: meet.google.com/wij-njcd-exg
TITLE:

MICROWAVE DEVICE FOR ANALYSIS AND FAULT DETECTION ON ANCHOR RODS OF GUYED TOWERS.

KEY WORDS:

High Frequency Connector, Anchor Rod, Fault Detection, Frequency Domain Reflectometry.

PAGES: 94
BIG AREA: Engenharias
AREA: Engenharia Elétrica
SUMMARY:

This work presents development of a microwave device of a fault detection system on anchor rod, which are structures that help support the guyed power transmission towers. This thesis project presents a system based on a frequency domain reflectometry (FDR) method and machine learning tool. The material loss suffered by these rods can lead to their rupture and therefore the guyed tower is about to fall. To avoid this accident, the companies have carries out prevent maintenance on their steel structures using the visual inspection technique on each anchor rod. A nondestructive techniques (NDT) has being developed which uses high frequency signals to detect faults on the anchor rods surface. High frequency pulses are inserted into the anchor rod samples through a vector network analyzer (VNA) for fault detection. The reflection coefficient is analyzed and compared to that obtained in the simulation results. A high frequency connector has been developed in this thesis to interconnect the VNA and the anchor rod. The experimental arrangement also involves, besides the VNA and the high frequency connector, the reference rod. The reference and anchor rods form a transmission line for signal traffic. Samples of anchor rods with and without faults were simulated, fabricated, measured and classified by a machine learning tool to determine the presence or absence of the faults on each of them.

BANKING MEMBERS:
Presidente - 2131653 - MARCOS TAVARES DE MELO
Externo ao Programa - 2733127 - LAURO RODRIGO GOMES DA SILVA LOURENCO NOVO
Externo ao Programa - 3081282 - LUIZ HENRIQUE DE ANDRADE ARAUJO
Externo à Instituição - PAULO HENRIQUE RAMALHO PEREIRA GAMA
Externo à Instituição - ELIAS MARQUES FERREIRA DE OLIVEIRA - UFRPE