Hardware design of a street lighting control system with vehicle and malfunction detection

摘要

This paper presents the hardware development of a street lighting monitoring and control system. The system consists of the JN5148 wireless transceiver, the dimming circuit that uses a PWM (Pulse Width Modulation) signal, the vehicle detection circuit and the circuit for detecting potential malfunctions. One way to achieve vehicle detection is the integration of a PIR sensor (Passive Infrared Sensor) into the system. Another way to detect vehicles is the integration of a sensor that uses the Doppler effect. The results obtained show that the Doppler sensor helps reduce false alarms detected by the PIR sensor, having immunity to temperature variations in the operating environment and a greater detection range of over 20m. Another aspect that has been analyzed is the circuit for the detection of possible malfunctions that are reported to the control center, thereby helping to reduce maintenance costs.