Title :
A Wireless Environmental Temperature Monitoring System
Author :
Dong JunHong ; Yin Ming ; Xie Feng
Author_Institution :
Electron. Coll. Of Eng., Naval Univ. of Eng., Wuhan, China
Abstract :
This system is a wireless environmental temperature monitoring device within 10m, which includes a monitoring terminal and a maximum of 255 nodes. Monitoring terminal and each node communicate by the ways of the UART asynchronous communication. In the transmitter, the control information and data packaged by the two top-down protocols is send to the transmitter modulation input in the form of a standard serial data. Then the signal is modulated by FSK modulation, lastly FSK signal amplified is send out by the antenna; In the receiver, the weak signal is amplified and demodulated by the phase-locked loop techniques. Then the data is sent to the microcontroller´s serial port and processed. As a simple circuit structure of this system, and fewer low-power device, the system is stability and energy.
Keywords :
computer interfaces; data communication equipment; frequency shift keying; protocols; temperature measurement; FSK modulation; FSK signal; UART asynchronous communication; control information; monitoring terminal; phase-locked loop techniques; standard serial data; top-down protocols; transmitter modulation input; weak signal; wireless environmental temperature monitoring device; wireless environmental temperature monitoring system; Asynchronous communication; Frequency shift keying; Microcontrollers; Monitoring; Phase locked loops; Presses; Wireless communication;
Conference_Titel :
Internet Technology and Applications, 2010 International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-5142-5
Electronic_ISBN :
978-1-4244-5143-2
DOI :
10.1109/ITAPP.2010.5566386
