Navegando por Assunto "Termografia infravermelha"

Agora exibindo 1 - 3 de 3

Acesso aberto (Open Access)
Assessment of surface temperatures of buffalo bulls (Bubalus bubalis) raised under tropical conditions using infrared thermography
(FEPMVZ Editora, 2016-04) BARROS, Daniel Vale; SILVA, Lílian Kátia Ximenes; KAHWAGE, Priscila Reis; LOURENÇO JÚNIOR, José de Brito; SOUSA, Jailson Silva; SILVA, André Guimarães Maciel e; FRANCO, Irving Montanar; MARTORANO, Lucieta Guerreiro; GARCIA, Alexandre Rossetto
This paper aimed to evaluate the surface temperatures of buffalo bulls using infrared thermography, considering four distinct anatomical parts over time, and to correlate surface temperatures and thermal comfort indexes. The humid tropical climate (Köppen's Afi) was predominant in the research station where the experiment was performed and the trial lasted from April to August. Ten bulls (n=10) were evaluated every 25 days (morning: 6:00-9:00; afternoon: 12:00-15:00) and the parameters assessed were respiratory rate (RR), rectal temperature (RT), and the thermograms of surface temperature for orbital area (ORB), right flank (RF), left flank (LF) and scrotum (SCR). Climatological data was continuously monitored and the Temperature and Humidity Index (THI) and the Index of Comfort of Benezra (ICB) were calculated. The average values of THI were ≥78, and significant differences between shifts were observed (P<0.05). The ICB ranged from 1.96 to 2.25 and significant differences were observed for shiftsand throughout the months (P<0.05). The averages of surface temperatures were RT=38.2±0.5°C, ORB=36.1±0.8°C, LF=33.5±2.5°C, RF=35.4±1.7ºC and SCR=33.3±1.1°C, which exhibited significant differences for shifts and throughout the months (P<0.05). Positive correlations were obtained between THI and ORB (0.72), RF (0.77), LF (0.75) and SCR (0.41) (P<0.0001). The maximum temperature of ORB showed the highest correlation with RT (0.58, P<0.0001). Therefore, the surface temperatures are subject to climatic variations and increase throughout the day, due to the variation in thermal comfort indexes, and the maximum ORB temperature was the parameter most related to rectal temperature. Lastly, the results indicate that IRT may be a useful non-invasive and accurate tool to detect the variations in ORB, LF, RF and SCR temperature in buffalo bulls.
Acesso aberto (Open Access)
Respostas termográficas em touros bubalinos submetidos à coleta de sêmen e avaliados sob condições agrometeorológicas no trópico úmido
(Universidade Federal do Pará, 2014-04-30) BARROS, Daniel Vale; LOURENÇO JÚNIOR, José de Brito; http://lattes.cnpq.br/2919433679918544; GARCIA, Alexandre Rossetto; http://lattes.cnpq.br/2678267039338224
Buffalo (Bubalus bubalis) livestock is mostly performed in the intertropical zone, where high temperatures prevail. Therefore the knowledge about buffaloes physiology on tropical environments and their possible responses due to tropical climate changes are essential. The objective of the study was to evaluate the variation in thermal comfort, physiological, hematological, seminal parameters and the superficial temperatures of buffalo bulls raised on humid tropical climate (Afi, Köppen classification). Ten buffaloes were kept in collective paddocks with free access to shade. During five months, data were registered from climatological meteorological station and three distinct dataloggers installed inside the stalls for calculating the Temperature and Humidity Index (THI). Respiratory rate (RR), heart rate (HR), rectal temperature (RT), superficial temperature of the eye (GLO), superficial temperature of the scrotum (ESC), superficial temperature of the right flank (FLd) and left flank (FLe) were registered. The Benezra´s Comfort Index (ICB) was also calculated. Semen collection was performed weekly by artificial vagina and blood sampling for assessment of blood counts were done monthly. The mean maximum of air temperature was 31.5°C and maximum a verage relative humidity was 93.2%. The THI was different only between periods (P<0.05). The RR, HR and ICB showed significant difference over the months and between shifts (P <0.05). RT differed between periods and reduced along months with lower value in August (37.8 ± 0.7°C). RT, GLO, FLd, FLe and ESC showed no diffe rence (P<0.05) for both periods and months. The hematocrit, mean corpuscular volume, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, gross motility and sperm vigor showed significant differences (P<0.05) along the months. The highest correlations between THI and superficial temperatures were between ITUmed and FLdmed (0.77; P<0.0001), ITUmed and FLemed (0.75; P<0.0001), ITUmed and GLO (0.72; P<0.0001), and ITUmed and ESC (0.41; P<0.0001). The highest correlation between internal temperature and surface temperature was TR and GLOmax (0.58; P<0.0001). Significant correlations were found between ICB and FR (0.97; P<0.0001), ICB and FC (0.89; P<0.0001), FC and FR (0.87; P<0.0001), THI and integrity of the plasma sperm membrane (-0.17; P<0.05). The results showed that animals had variations in thermal comfort and increased superficial temperature in the hottest periods of the day, however they were able to maintain homeothermy. Finally, the infrared thermography can be used as a noninvasive and auxiliary technique in studies about animal physiology and thermoregulation.
Acesso aberto (Open Access)
Utilização da termografia infravermelha embarcada em RPA como alternativa de monitoramento de surgências em uma barragem de mineração
(Universidade Federal do Pará, 2024-05-17) BARROS, Eudes José Melo de; GOUVEIA, Fernanda Pereira; http://lattes.cnpq.br/1772072130947378
Safety inspections aim to detect anomalies in structures, and the entrepreneur must guarantee these procedures, in accordance with ANM Resolution No. 95/2022. Therefore, many mining companies have been seeking more efficient methods or techniques that allow for less use of resources and, at the same time, greater control of information from inspected locations. In cases of detecting areas with emergencies, research shows that infrared thermography on board a RPA (Remotely Piloted Aircraft), popularly known as a drone, (TERMO-RPA) is efficient in identifying areas with humidity and infiltrations. Therefore, the objective of the research is to propose the use of this method in the inspection procedures of a mining dam, aiming to detect areas with emergencies. The methodology adopted comprised the following steps: a) Characterization of the dam; b) Description of the methodology of TERMO-RPA inspection procedures; c) Treatment of thermal camera images after inspections; d) Characterization tests of the soil collected from the regions for classification and analysis of possible influence on the detection of emergences; e) Determination of environmental variables in the inspected regions; f) Preparation and analysis of TERMO-RPA thermographic mapping, g) Description of routine dam inspection procedures and advantages of inspection with the TERMO-RPA method. It was concluded that there is an inversely proportional correlation between the temperatures obtained from soil thermography and soil humidity, that is, areas with lower temperatures presented higher percentages of humidity, while in areas with higher temperatures, humidity was lower, This behavior was observed in both periods (dry and rainy). It was not possible to reach an assertive conclusion about the influence of the type of soil and the effectiveness of detecting emergences, since the regions with the presence of humidity are composed of the same type of soil. It was possible to identify advantages in using TERMO-RPA when compared to routine inspections carried out by the entrepreneur, namely: safety aspect with reduced risk exposure; greater agility; absence of restrictions on access to inspection sites; In terms of range, it makes it possible to vary the taking of thermal images of the dam, depending on desired altitudes. Finally, future work is suggested to evaluate the influence of environmental conditions such as temperature and humidity, as well as the presence of vegetation on the soil surface when using the TERMO-RPA method.