SL3-1 型双翻斗雨量计测量协调性研究

Research on measurement coordination of SL3-1 double bucket raingauge

摘要:

为研究双翻斗雨量计测量协调性，通过模拟降水建立统计模型，分析上下翻斗排水量的构成因子，上翻斗流失量与倾角及雨强的关系，论证下翻斗流失量的必然性及消失现象，讨论下翻斗流失量被上翻斗的影响程度，以及下翻斗翻转阈值和流失量的合理取值范围。根据上翻斗不同翻转阈值对测量结果的影响对雨量计的测量协调状态进行分类，指出大小雨强两极分化原因和解决方法，得出雨量计最佳协调状态时的数据模型为： 上翻斗翻转阈值接近 0.100 mm，下翻斗翻转阈值接近 0.080 mm，上下翻斗在小雨强下完全同步而大雨强下翻转比例低于 9∶10。实践表明：据此模型将上下翻斗翻转阈值和不同雨强下翻转比例关系纳入双翻斗雨量计检修流程中可明显提高检定效率，也为双翻斗雨量计的分析研究提供新的方法和思路。

Abstract:

In order to study the measurement coordination of double bucket raingauge, a statistical model is established by simulating rainfall process, which could analyze the constituent factors of the upper and lower bucket displacement, analyze the relation between the wastage and inclination angle and rainfall intensity, demonstrate the wastage inevitability of lower bucket and the phenomenon of wastage disappearing, discuss the influence of wastage of lower bucket from upper bucket, and discuss the reasonable value range of capacity and wastage of upper bucket. According to the influence of flip threshold from upper bucket on the measurement results, gauge measurement coordination states are classified, and reasons and solutions of the polarization of different rain intensities are pointed out. Data model of the best coordination state of raingauge is drawn as: flip threshold of upper bucket and lower bucket is 0.1mm and 0.08mm respectively, tip between buckets can be synchronous under light intensity, and lower than 9:10 under heavy intensity. Practice indicates that, according to the model, it can improve the verification efficiency when incorporated flip threshold and tipping proportion under different rain intensities are included in maintenance process, which could provide a new method and idea for the analysis and research of double bucket raingauge.