Monitoring Pig Body Temperature Using Infrared Sensors

  • Jang, Jin Cheol ;
  • Lee, Min Ho ;
  • Lee, Jun Yeop ;
  • Choi, Hee Chul ;
  • Choi, Dong Yun ;
  • Kim, Hyeok Ju ;
  • Kim, Hyeon Tae
  • Received : 2015.10.01
  • Accepted : 2015.11.23
  • Published : 2015.12.01


Purpose: The purpose of this study is to verify the feasibility of using an infrared sensor to measure the body temperature of a sow. We first conducted experiments on three pigs by using three infrared sensors and one indoor temperature sensor. Methods: The three infrared sensors were installed inside our model house and were used to take temperature measurements per second of the backs of the pigs. While feeding, the temperatures of the backs of the pigs were measured at distances of 10 cm, 20 cm, and 30 cm from the infrared sensors. Results: We concluded that the relation between the temperature of the pigs' backs and the indoor temperature was y =0.549x + 18.459 at a measuring distance of 30 cm. The relation was y = 0.645x + 15.461 for a distance of 20 cm and y = 0.760x + 11.913 for a distance of 10 cm. We found high correlation between the indoor temperature and the temperature of the pigs' backs. Conclusions: It is possible to use an infrared thermometer to monitor the temperature of pigs' backs. This system seems to be feasible and effective in monitoring pig temperature. The use of an infrared thermometer will also make daily monitoring easy. In later experiments, the possibility of developing a system that can determine if an error can be corrected by using infrared sensor is explored by considering humidity variables.


Body temperature;Indoor temperature;Infrared sensor;Monitoring system;Pig


  1. Lee, S. K., Y. B. Min and T. K. Kim. 1991. Development of Wireless Measurement System of Somatic Informations for Stockbreeding Automatization(I). Biosystems Engineering 16:263-271 (In Korean, with English abstract).
  2. Soerensen, D. D., S. Clausen, J. B. Mercer and, L. J. Pedersen. 2014. Determining the emissivity of pig skin for accurate infrared thermography. Computers and Electronics in Agriculture 109:52-58.
  3. Yi, O. H., W. Y. Jeong, S. C. Lee and S. R. Lee. 2012. Changes in Body Temperature of Piglets in a Day. The Korean Society for Livestock Housing and Environment 18:91-94 (In Korean, with English abstract).
  4. Yu, W. G. 2013. A Study on the Diurnal Change of Body Temperature in Pigs. MS thesis. Gwangjin-gu, Seoul: Konkuk University, Department of Animal Science and Technology (In Korean, with English abstract).
  5. Henken, A. M., H. A. Brandsma, W. van der Hel and M. W. Verstegen. 1993. Circadian rhythm in heat production of limit-fed growing pigs of several breeds kept at and below thermal neutrality. Journal of Animal Science 71:1434-1440.
  6. Ingram, D. L. and L. E. Mount. 1973. The effects of food intake and fasting on 24-hourly variations in body temperature in the young pig. Pflugers Arch 339:299-304.
  7. Jeong, W. Y., O. H. Yi, S. C. Lee and S. R. Lee. 2012. Establishment of Data Base for Body Temperature Change in Cattle. The Korean Society for Livestock Housing and Environment 18:95-98 (In Korean, with English abstract).
  8. Kim, S. G., K. B. Kwak and T. K. Kim 1995. Effects of Scale Expansion by Automatization in Pork Production. Korea Association of Livestock Management 11:125-138 (In Korean, with English abstract).
  9. Kim, Y. J., D. Y. Lee and K. H. Han. 2003. Clinical Studies for the Development of Non-contact Thermometer to Take Easily the Body Temperature of Domestic Animals. The Korean Society of Veterinary Clinics 20:357-363 (In Korean, with English abstract).


Supported by : Rural Development Administration