Application of wireless sensor networks and gis for study the environment in the orchard

Abstract

The objective of this research was to study environment changes in orchards by using wireless sensor network and spatial data interpolation technique. The study was conducted by distributing several client sensors into the two study areas for recoding temperature, himudity and light internsity. These data are send to a server using 433 MHz radio signal. The results from the first study area in Thachang District shew that the light intensities were significantly changed during 6:00-6:59, 11:00-14:00 and 18:00-19:59. For the humidities, they were significantly changed during 7:00-8:59, 17:00-19:59 and 22:00-23:00 which were quite different from the changing of light intensity. Lastly, the temperatures were mostly changed during 7:00-7:59, 10:00-14:59 and 18:00-19:59 which were highly related to the changes of light intensity. For the second study area in Angkhiri District, light intensities were significantly changed during 7:00-7:59, 11:00-14:00 and 18:00-19:59, while the changing durations for the humidities were 9:00-9:59, 12:00-15:00 and 17:00-19:59. Very similarly to the light intensity, the temperatures were changed during 8:00-8:59, 11:00-14:59 and 15:00-17:59. For the communiation distances, the maximum distance for transfering data in an open area was 100 meter, and 25 meters with obstables.