Application of fuzzy logic on correlation between piglet’s surface temperature and thermal comfort for Piracicaba
The constant influence of the human-being in animal management activities, besides increasing the cost of production, becomes a source of animal stress; which generates the most important signs of the process, acting as a bio-sensor that needs to be measured in a continuous and direct way. From the...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Instituto de Zootecnia
2015-02-01
|
| Series: | Boletim de Indústria Animal |
| Subjects: | |
| Online Access: | http://35.199.65.98/index.php/bia/article/view/373 |
| _version_ | 1811339052542066688 |
|---|---|
| author | Isabella Cardoso Ferreira da Silva Condotta Késia Oliveira da Silva Miranda Gustavo Marques Mostaço |
| author_facet | Isabella Cardoso Ferreira da Silva Condotta Késia Oliveira da Silva Miranda Gustavo Marques Mostaço |
| author_sort | Isabella Cardoso Ferreira da Silva Condotta |
| collection | DOAJ |
| description | The constant influence of the human-being in animal management activities, besides increasing the cost of production, becomes a source of animal stress; which generates the most important signs of the process, acting as a bio-sensor that needs to be measured in a continuous and direct way. From the many available options to obtain an animal temperature parameter, the measurement of external temperature proves to be a less invasive method. Fuzzy system, based on fuzzy logic, works with inaccurate information and converts them into a mathematical language with easy computational implementation. Therefore, this work aims to use fuzzy logic as a tool for assessing the degree of swine thermal comfort, using variables data entry related to the environment and the animal. For this purpose, a simulation using Microsoft Excel software was performed with the possible environmental conditions of the region of Piracicaba (Dry Bulb Temperature - Ts and Relative Humidity - UR), interacting with the local altitude (z) and potential tympanic piglets temperatures (TiF) using equations 1 and 2 adapted from Mostaço (2014). After performing the simulations, Rectal Temperature (TR) and respiratory frequency (FR) data obtained were crossed with FR, TR and critical temperatures for condition of thermal comfort of piglets (5th to 8th week) values, proposed by Mostaço (2014) through the fuzzy logical toolbox of MATLAB software. Ts, UR and TiF were used as variables, the variable output obtained was the Thermal Comfort (TC), rated as good (situation of comfort), bad (stress due to excess or lack of heat) and very bad (death of the animal). Membership functions were generated from data, correlating all the variables that were subdivided into relevant groups; furthermore, a system of rules was generate, whereby it was possible to simulate inputs of environmental and animal characteristics, resulting the probable condition of the animal thermal comfort. The study concluded that the application of fuzzy logic provided a model of easy interpretation and adaptability, on achieving a recognized comfort degree for piglets. It proved to be able to change the rules system and membership functions, to attend other locations and other phases of growth; which indicates the possibility of developing a model that determines the occurrence of heat stress from swine body temperature and environment data, assisting in decision making and therefore improving the welfare quality and reducing production costs. |
| first_indexed | 2024-04-13T18:20:21Z |
| format | Article |
| id | doaj.art-2223d877f8f8408eaff59f6d7932925f |
| institution | Directory Open Access Journal |
| issn | 1981-4100 |
| language | English |
| last_indexed | 2024-04-13T18:20:21Z |
| publishDate | 2015-02-01 |
| publisher | Instituto de Zootecnia |
| record_format | Article |
| series | Boletim de Indústria Animal |
| spelling | doaj.art-2223d877f8f8408eaff59f6d7932925f2022-12-22T02:35:28ZengInstituto de ZootecniaBoletim de Indústria Animal1981-41002015-02-0171Application of fuzzy logic on correlation between piglet’s surface temperature and thermal comfort for PiracicabaIsabella Cardoso Ferreira da Silva CondottaKésia Oliveira da Silva MirandaGustavo Marques MostaçoThe constant influence of the human-being in animal management activities, besides increasing the cost of production, becomes a source of animal stress; which generates the most important signs of the process, acting as a bio-sensor that needs to be measured in a continuous and direct way. From the many available options to obtain an animal temperature parameter, the measurement of external temperature proves to be a less invasive method. Fuzzy system, based on fuzzy logic, works with inaccurate information and converts them into a mathematical language with easy computational implementation. Therefore, this work aims to use fuzzy logic as a tool for assessing the degree of swine thermal comfort, using variables data entry related to the environment and the animal. For this purpose, a simulation using Microsoft Excel software was performed with the possible environmental conditions of the region of Piracicaba (Dry Bulb Temperature - Ts and Relative Humidity - UR), interacting with the local altitude (z) and potential tympanic piglets temperatures (TiF) using equations 1 and 2 adapted from Mostaço (2014). After performing the simulations, Rectal Temperature (TR) and respiratory frequency (FR) data obtained were crossed with FR, TR and critical temperatures for condition of thermal comfort of piglets (5th to 8th week) values, proposed by Mostaço (2014) through the fuzzy logical toolbox of MATLAB software. Ts, UR and TiF were used as variables, the variable output obtained was the Thermal Comfort (TC), rated as good (situation of comfort), bad (stress due to excess or lack of heat) and very bad (death of the animal). Membership functions were generated from data, correlating all the variables that were subdivided into relevant groups; furthermore, a system of rules was generate, whereby it was possible to simulate inputs of environmental and animal characteristics, resulting the probable condition of the animal thermal comfort. The study concluded that the application of fuzzy logic provided a model of easy interpretation and adaptability, on achieving a recognized comfort degree for piglets. It proved to be able to change the rules system and membership functions, to attend other locations and other phases of growth; which indicates the possibility of developing a model that determines the occurrence of heat stress from swine body temperature and environment data, assisting in decision making and therefore improving the welfare quality and reducing production costs.http://35.199.65.98/index.php/bia/article/view/373swinethermal comfortfuzzy logic |
| spellingShingle | Isabella Cardoso Ferreira da Silva Condotta Késia Oliveira da Silva Miranda Gustavo Marques Mostaço Application of fuzzy logic on correlation between piglet’s surface temperature and thermal comfort for Piracicaba Boletim de Indústria Animal swine thermal comfort fuzzy logic |
| title | Application of fuzzy logic on correlation between piglet’s surface temperature and thermal comfort for Piracicaba |
| title_full | Application of fuzzy logic on correlation between piglet’s surface temperature and thermal comfort for Piracicaba |
| title_fullStr | Application of fuzzy logic on correlation between piglet’s surface temperature and thermal comfort for Piracicaba |
| title_full_unstemmed | Application of fuzzy logic on correlation between piglet’s surface temperature and thermal comfort for Piracicaba |
| title_short | Application of fuzzy logic on correlation between piglet’s surface temperature and thermal comfort for Piracicaba |
| title_sort | application of fuzzy logic on correlation between pigleta€™s surface temperature and thermal comfort for piracicaba |
| topic | swine thermal comfort fuzzy logic |
| url | http://35.199.65.98/index.php/bia/article/view/373 |
| work_keys_str_mv | AT isabellacardosoferreiradasilvacondotta applicationoffuzzylogiconcorrelationbetweenpigletassurfacetemperatureandthermalcomfortforpiracicaba AT kasiaoliveiradasilvamiranda applicationoffuzzylogiconcorrelationbetweenpigletassurfacetemperatureandthermalcomfortforpiracicaba AT gustavomarquesmostaao applicationoffuzzylogiconcorrelationbetweenpigletassurfacetemperatureandthermalcomfortforpiracicaba |