Abstract:In order to solve the problems that the working state of the double tipping bucket rainfall sensor cannot be monitored in real time and the fault detection is not timely, a real-time monitoring system of the working state of the rainfall sensor without changing the mechanical structure of the sensor itself and the interface circuit in the automatic weather station collector was designed. The system realizes the identification of effective rainfall through the rainfall detection module, realizes the working status monitoring of the important components inside the rainfall sensor through the modules such as funnel blockage detection, tipping action detection and reed pipe status detection, realizes the detection and displacement of intruders such as animals through intrusion monitoring and sound and light alarm modules, and realizes the remote transmission of relevant data through the communication module. The results show that the system can timely and accurately identify and record the fault category and its occurrence time of the rainfall sensor, and notify the meteorological staff to carry out maintenance operations, so as to effectively mark and shorten the time period when the rainfall data is not available. In addition, the sensor failure data accumulated through this system also contributes to the continuous improvement of subsequent rain sensors and their maintenance processes.