Abstract
A remote temperature and humidity monitoring system is designed based on the GSM technology and MSP430. With the digital sensor DSB1820 and SHT11, the temperature and humidity of the granary are detected, and these parameters can be adjusted with the controlling system to adapt various working conditions. Through the GSM system, the detected data could be sent to various monitoring devices, such as cellphones and laptops. These data can be used for data display, inquiry, controlling and storage at the remote terminals. The experimental results show that the system is convenient and concise, which meets the remote monitoring demand for the modern granary.
Highlights
Safe storage of grain is a big problem of people's livelihood, in the process of grain storage, easy to affected by storage environment temperature and humidity conditions, easy to fever, mildew and insect pests, etc.while improper granary of temperature or humidity control, resulting in loss of food, to ensure the storage of food in good condition, must make the granary of the temperature and humidity control in a certain range.In order to improve the reliability of the system, GSM mobile communication network of wireless data transmission technology is applied to the granary monitoring system, which has less investment, quick opening, simple operation, low communication cost, and the advantages of reliability and coverage guaranteed, very suitable for small granary monitoring system of data transmission
MSP430 microcontroller as control core, through the external keyboard can set the telephone number and the monitoring center temperature and humidity, using temperature and humidity sensors to detect the monitoring point temperature and humidity inside the granary, using a temperature sensor to collect grain temperature, and the temperature and humidity data sent to the single-chip microcomputer software system for data processing, single chip digital output of the D/A conversion into A suitable analog to drive actuators to adjust temperature and humidity, so as to ensure the temperature and humidity of granary and grain are within the scope of the set
Granary data acquisition module is responsible for the internal temperature and humidity information collection and data conversion, the system uses the temperature and humidity sensors SHT11 which was launched by sensirion company, the chip including temperature and humidity sensor, signal amplification processing, A / D conversion and I2C bus interface
Summary
Safe storage of grain is a big problem of people's livelihood, in the process of grain storage, easy to affected by storage environment temperature and humidity conditions, easy to fever, mildew and insect pests, etc.while improper granary of temperature or humidity control, , resulting in loss of food, to ensure the storage of food in good condition, must make the granary of the temperature and humidity control in a certain range.In order to improve the reliability of the system, GSM mobile communication network of wireless data transmission technology is applied to the granary monitoring system, which has less investment, quick opening, simple operation, low communication cost, and the advantages of reliability and coverage guaranteed, very suitable for small granary monitoring system of data transmission
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