Design of Wireless Monitoring Environment System Based on AVR SCM

Abstract

The system had achieved a wireless data communication function using AVR SCM as a control center and basing on radio frequency identification technology. The transmitting terminal of system produces a high frequency signal through capacitance connecting three point type oscillator. And the encoded signal will be transmitted after high-frequency carrier modulated. While after the receiving terminal receive the signal through antenna, and the signal after a series processes including amplification, detection, rectification, voltage comparison will be processed by SCM. The system includes temperature humidity sensor, clock generator chip, photosensitive element, could detect the surrounding environment signal and wireless transmit. The paper elaborates the soft and the hardware realizing specific course of the wireless transmission system. It has an important meaning for the wireless transmission technique.

Automatic Gas Meter Reading System Based on Wireless Sensor Network

“…Manual reading workload and low efficiency, poor accuracy and real-time capability. RS-485 has a widely coverage broad, but to be artificial wiring, the workload is big, and not easy to maintain [1]. Electric carrier meter reading requires the power-line keep steady, and easy to interfere [2].…”