称重式降水传感器现场校准方法研究

Research on field calibration method of weighing precipitation sensor

为进一步做好称重式降水传感器技术装备保障工作,使观测数据更加准确,文章以DSC3型称重式降水传感器为例,依据其结构及工作原理,向收集容器注入不同水位,控制流量模拟不同雨强对称重式降水传感器进行现场校准。结果表明:校准称重式降水传感器与收集容器水位无关,不同的降水强度其误差稳定不变,校准后所得误差可作为系统误差,较翻斗式雨量传感器更加精准可靠。

In order to guarantee the technical equipment of the weighing precipitation sensor and make its observation data more accurate,taking DSC3 weighing precipitation sensor as an example,and according to its structure and working principle,the different water levels are injected into the collection container,and the field calibration of the weighing precipitation sensor is carried out by controlling the flow and simulating different rainfall intensity.The results show that the calibrated weighing precipitation sensor has nothing to do with the water level of the collecting container.The error is stable for different precipitation intensities.The error obtained after calibration can be regarded as the systematic error,which is more accurate and reliable than the tipping bucket rainfall sensor.