Improvement in the efficiency of Reading Gages Electronic Transmission by Frequency Modulated

Humberto Sousa Silva, José Carlos Morilla


This work aims, using frequency modulation, transmission via copper cable electrical signals from the readings of strain gages. This system allows the elimination of interference caused by changes in temperature and other characteristics that directly influence the resistivity of the conductor used for sending the reading to the nearest processing center. Using a voltage controller oscillator, that signal will include the output voltage of the Wheatstone bridge on a base carrier frequency, and an amplifier for signal transmission, the system can retrieve the modulated voltage level at any point where the copper conductor is passing through a widely known and used for communication in the wireless broadcasting system in FM demodulation.

Keywords: extensometer, frequency modulation, resistivity, transmission.

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