نظارت از راه دور برای سیستم های خورشیدی فتوولتائیک در برنامه کاربردی روستایی با استفاده از کانال صوتی GSM

A new technique is proposed as a solution to overcome the limitations of other techniques. The proposed technique uses GSM voice channel for the communication of data, in the form of analog signal between transmitter and receiver. In order to study and evaluate the performance of proposed technique, various experiments have been performed and impact of parameters like shape (sine, square and triangular), frequency (50 - 4000 Hz) and amplitude (0 – 6 V) of analog signal have been studied. It is observed that sine wave of frequency from 300 Hz to 3300 Hz with 4.5 V maximum amplitude can be sent on voice channel of GSM network with less than 1% error. This technique has low initial as well as operating cost. The GSM network is readily available in rural areas; this technique can be used easily.