Device for improving measurement accuracy and measurement reliability of single-tipping-bucket rain gauge and use method for same

Abstract

The invention discloses a device for improving the measurement accuracy and the measurement reliability of a single-tipping-bucket rain gauge and a use method for the same. According to the device and the method, the conventional stainless steel is replaced by a light-weight alloy material for producing a tipping bucket, and Teflon is sprayed on the surface of the water collection side of the rain gauge; a difference reduction system composed of a micro-valve, a valve opening-closing device and a bypass flow guide tube is additionally arranged; a double-reed switch composed of two single reed switches which are arranged in a staggering manner is used for replacing the conventional reed switch; the switching signal output by the reed switch is processed by adopting a mutual calibration method for the two double-reed switches; and a digital rain amount value is transmitted via a low-power-consumption ZigBee wireless mode which is convenient for networking. Via the device and the use method disclosed by the invention, the difference and the wetting loss during the measurement process are reduced, the defect that the single reed switch is easy to generate mis-operate due to the environment magnetic interference is solved, and the reliability of the rain gauge is improved; and the digital rain amount value is transmitted via the low-power-consumption ZigBee wireless mode, so that the networking is convenient.

Description

technical field [0001] The invention belongs to the technical category of a tipping bucket rain gauge, and in particular refers to a technique and a method for improving measurement accuracy and reliability of the rain gauge based on the structure of the existing single tipping bucket rain gauge. Background technique [0002] Precipitation is the basic element of hydrology and meteorology, and its measured value has important guiding significance for industrial and agricultural production, flood control and disaster reduction. The total amount of water resources in my country is 2812.4 billion m 3 , ranking fifth in the world; per capita owns 2163 m 3 , which is only equivalent to 1 / 4 of the world's per capita volume, and ranks after 100 in the global ranking table. With the rapid development of my country's economy and the continuous improvement of the quality of life, the existing water supply is difficult to support the growing demand; rainfall is a key factor in the as...

AI Technical Summary

Problems solved by technology

The measurement error of the existing tipping bucket rain sensor varies with the intensity of the rain and the accuracy is not good: it is a positive deviation in heavy rainfall, and a negative deviation in arid areas with frequent light rain; the reliability of the rain sensor signaling device (reed switch) cannot meet high Reliable rainfall measurement requirements, the sending device is susceptible to defects such as malfunction due to environmental magnetic interference; put forward corresponding improvement plans one by one

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