Abstract:According to the actual needs of on-site verification and testing of solid state precipitation sensors at meteorological observation stations, a on-site verification device was developed, and the on-site verification and testing of solid state precipitation sensors was realized by combining the weight method; The on-site verification device is composed of a data acquisition device and an weighting device based on ZigBee wireless network. The data acquisition device has the real-time detection ability of ambient air pressure, temperature, and relative humidity, and has the data reading ability of three solid-state precipitation sensor interfaces: RS232, RS485, and on-off signal mode; The weighting device is composed of a triangular bracket, an OPD precipitation simulator, and a weight tray. The precipitation simulator uses a method of blocking the infrared beam of the original OPD precipitation generation detector and artificially giving a specified frequency pulse signal to achieve precipitation simulation, which is compatible with various types of solid-state precipitation sensors; Through experimental testing, the solid-state precipitation sensor can accurately identify the weight added to it, and the data reading accuracy of the three interfaces of the data acquisition device reaches 100%; The correlation coefficient between the measured precipitation value and the theoretical value is 0.9999; This indicates that the on-site verification device can be applied to the on-site verification and testing business of solid-state precipitation sensors.
