Design of Power Cables Anti-Theft and Monitoring System Based on PWM

The paper presents a design of power cables anti-theft and monitoring system based on PWM, which is mainly based on traveling wave theory. The system consists of signal generated and measurement circuit, alarm circuit which can automatically generates alarm, and user interface. In the paper, firstly, the theoretical analysis was discussed, then, detailed design information was given out, including the main hardware and software parts. Finally, experimental tests were done to verify the accuracy and function implementation of the system. Results indicated that the system can deal with the cable stolen condition well, with an error less than ±3%, in addition, with automatically alarm function and friendly user interface.