A low-cost microcontroller-based system to monitor crop temperature and water status

被引:64
作者
Fisher, Daniel K. [1 ]
Kebede, Hirut [2 ]
机构
[1] USDA ARS, Applicat & Prod Technol Res Unit, Stoneville, MS 38776 USA
[2] USDA ARS, Crop Genet Res Unit, Stoneville, MS 38776 USA
关键词
Microcontrollers; Sensors; Infrared thermometer; Air temperature; Soil temperature; Datalogging; Soil moisture; CANOPY TEMPERATURE; WHEAT;
D O I
10.1016/j.compag.2010.07.006
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
A prototype system was developed and constructed for automating the measurement and recording of canopy-, soil-, and air temperature, and soil moisture status in cropped fields. The system consists of a microcontroller-based circuit with solid-state components for handling clock/calendar, sensor power, and data storage and retrieval functions. Sensors, including an analog soil moisture sensor, analog and digital temperature sensors, and a digital infrared thermometer, are widely available and inexpensive. The circuit board and sensor assemblies require approximately 4h to construct and test, and material costs totaled approximately US$84. Systems were built and tested during the 2009 growing season in a corn field to evaluate performance and suitability under local conditions. The sensors performed according to manufacturers' specifications, with accuracies of +/- 0.4 degrees C, 1.4 degrees C, and +/- 0.3 degrees C for air-, soil-, and canopy-temperature measurements, respectively. Soil moisture sensors were calibrated and provided measurements within +/- 2 kPa of the manufacturer's values. Reliability of data collection and storage averaged 91%, with most bad or missing data occurring during periods of inclement weather and electrostatic interference. Published by Elsevier B.V.
引用
收藏
页码:168 / 173
页数:6
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