A self-cleaning evaporation sensor and its control method

Abstract

The invention discloses a self-cleaning evaporation sensor. The self-cleaning evaporation sensor comprises an evaporation barrel, a controller, a water level gauge, a rain gauge and a positive-and-negative-rotating water pump, wherein a stand pipe is arranged in the evaporation barrel, a self-rotating spraying head is arranged at the top of the stand pipe, the water level gauge is connected with the evaporation barrel through a communication pipe, the communication pipe is connected into the evaporation barrel, the stand pipe is connected with the positive-and-negative-rotating water pump, a three-way electric ball valve is connected to the upper end of the positive-and-negative-rotating water pump, the controller is connected with the water level gauge, the rain gauge, the positive-and-negative-rotating water pump and the three-way electric ball valve, a magnetic float is arranged in the communication pipe, a water feeding pipe and a water draining pipe are also connected on the three-way electric ball valve, an overflowing hole is formed in the upper portion of the evaporation barrel, and a hydrosphere is arranged on the periphery of the evaporation barrel at the overflowing hole; the invention also discloses a specific control method of the self-cleaning evaporation sensor. Automatic cleaning, automatic water supplementing and automatic water draining functions can be achieved, and the self-cleaning evaporation sensor has the advantages of being high in automatic degree, stable and reliable in running and high in measurement accuracy.

Description

technical field [0001] The invention belongs to the technical field of hydrological and meteorological measuring instruments, in particular to a self-cleaning evaporation sensor and a control method thereof. Background technique [0002] The measurement of evaporation is very important for agriculture, hydrology and water conservancy, especially in arid and semi-arid climate regions. In meteorology, evaporation buckets containing a certain amount of water are usually used to observe evaporation, but the results of such observations usually cannot represent the evaporation of water and soil under actual natural conditions. soil evaporation bucket for observation. [0003] Water surface evaporation is an important link in the monitoring of the earth's water cycle, an important part of water resources utilization, and an important factor in many aspects such as climate change, drought, and environmental assessment. Scholars in the industry seek to automatically measure evapora...

AI Technical Summary

Problems solved by technology

[0008] The measurement error of the rain gauge is relatively large, and the float type water level gauge has a starting torque, and the accuracy is difficult to reach 0.1mm. Therefore, the comprehensive accuracy is difficult to reach ±3% specified in the specification

And no automatic cleaning function

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