Multi-Point Analogous Monitoring System Utilizing Pulse Frequency Signal

This paper briefly introduced a practical system utilizing pulse frequency signal to achieve multipoint analogous monitoring. The system is original in conception, practical and economic. Due to the use of dual tone signal and pulse frequency signal for achieving acquisition and transmission of analogues, the system has the capability of good anti-inteference and high reliability. It is most suitable for use in factory or mine site with random interfernce sources.