Desenvolvimento de um sistema de termometria por ultrassom para monitoramento de temperatura

• Ano de defesa: 2017
• Autor(a) principal: Andrade, Patrícia Cardoso de
• Orientador(a): Vieira, Sílvio Leão
• Banca de defesa: Carneiro, Antônio Adilton Oliveira, Oliveira, Lucas Nonato de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Goiás
• Programa de Pós-Graduação: Programa de Pós-graduação em Engenharia Elétrica e da Computação (EMC)
• Departamento: Escola de Engenharia Elétrica, Mecânica e de Computação - EMC (RG)
• País: Brasil
• Palavras-chave em Português: Termometria; Monitoramento de temperatura; Ultrassom; Processamento de sinais; Termopares
• Palavras-chave em Inglês: Thermometry; Monitoring temperature; Ultrasound; Signal processing; Thermocouples
• Área do conhecimento CNPq: ENGENHARIA BIOMEDICA::ENGENHARIA MEDICA
• Link de acesso: http://repositorio.bc.ufg.br/tede/handle/tede/7477

Measuring internal temperature and/or temperature gradient in materials is of fundamental interest in both engineering and basic sciences because the temperature is closely related to the properties of the material. The purpose of this study was to develop an ultrasound thermometry system for internal temperature gradient monitoring of materials subjected to a heat source. A low cost oscilloscope was used as a system for the acquisition of ultrasonic signals. Jointly, was developed a computational algorithm responsible for estimating the internal temperature distribution of materials. For this purpose was used a low cost oscilloscope as a system for the acquisition of ultrasonic signals. Measurements were taken during the heating and cooling regimen of an aluminum block. A thermocouple temperature measurement system was used to verify and validate the temperature distribution obtained by the ultrasound thermometry method. The development of the computational algorithm responsible for communication and data collection provided real-time temperature measurements. The comparison of the temperature measurements derived from both methods showed agreement greater than 96%, with differences lower than 0.70°C. The methodology presented was relevant within the laboratory context to estimate the internal temperature of heated materials.