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Wireless sensing system for environmentalhumidity and temperature monitoring

 

YUAN Yao-dong(袁耀东), ZHANG Ai-jun(张爱军)

School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

 

Abstract: Aiming at the actual demand for monitoring environmental information, a wireless sensing system for temperature and relative humidity (RH) monitoring based on radio frequency (RF) technology and mobile network was designed. This paper introduces the architecture of the system. The system uses AVR micro contr oller unit (MCU), KYL-1020U RF module and SHT71 to complete real-time temperatur e and humidity monitoring, and uses SIM900A module to realize remote alarming an d monitoring with short message system (SMS) through global system for mobile co mmunication (GSM). Experimental results show that the designed system has good s tability of measurement and real-time performance, and it can be used in some sm all temperature and humidity monitoring occasions.

 

Key words: environmental monitoring; temperature and humidity; radio frequency (RF) technology; wireless transmission; global system for mobile communication ( GSM)

CLD number: TP274 Document code: A

Article ID: 1674-8042(2013)03-0267-05 doi: 10.3969/j.issn.1674-8042.2013.03.0 14

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