Water surface evaporator for lakes and rivers

Abstract

The invention discloses a water surface evaporator for lakes and rivers, and belongs to the field of water surface evaporation measurement. Comprising a plurality of swing arms which are symmetrically fixed on a floating mat around the gravity center of an evaporating dish and keep a certain distance from the evaporating dish; the swing arm is hinged with the crankshaft and is used for holding the evaporating dish when the inclination angle of the evaporating dish exceeds a set threshold value; the balancing weights are located at all corners of the lower surface of the floating mat and connected with the lifting rope. One end of the crankshaft is connected with the swing arm, and the other end is connected with the swing arm control loop; one end of the lifting rope is connected with the balancing weight, and the other end is connected with the balancing weight control loop; the controller is used for calculating the inclination angle of the evaporating pan, and if the inclination angle of the evaporating pan exceeds a set threshold value, the swing arm control loop is connected, and the balancing weight control loop is disconnected; if the set threshold value is not exceeded, the balancing weight control loop is connected, and the swing arm control loop is disconnected. Through cooperation of the swing arm and the balancing weight, the evaporator is kept in a stable posture, and the evaporator can still keep stable monitoring on the water surface with large waves.

Description

technical field [0001] The invention belongs to the field of water surface evaporation measurement, and more particularly relates to a water surface evaporator for lakes and rivers. Background technique [0002] Evaporation is an integral part of the surface heat balance and water balance, and it is also an item in the water cycle that is most directly affected by land use and climate change. At the same time, evaporation is also an important factor in heat energy exchange. Therefore, evapotranspiration has important application value in estimating terrestrial evaporation, crop water demand and crop water balance. [0003] The current evaporation measurement research is more perfect in terms of land measurement, but there are not many water surface evaporation measurement equipment. CN213780405U can measure the presence or absence of rainfall, and can block the evaporator to avoid rain interference when it rains; CN2275229Y can realize automatic water replenishment after th...

AI Technical Summary

Problems solved by technology

CN213780405U can measure the presence or absence of rainfall, and can block the evaporator to avoid rainwater interference when it rains; CN2275229Y can realize automatic replenishment of water after the water volume of the evaporator is reduced; some devices are dedicated to solving the problem of coefficient conversion between the evaporator and the evaporation area of ​​a larger water area. Scale and multi-dimensional measurement to calibrate coefficients, such as CN214201810U; some patents propose a self-monitoring device for the whole process of water surface evaporation in order to solve the problem that existing automatic monitoring devices are only partially automated and still require partial manual observation; a few devices can analyze in a short time Water level change trend to judge the weather (such as CN103760623B), wait for the next period of time to measure and analyze

For evaporators floating on the water surface of lakes or reservoirs, they are often affected by strong winds and waves caused by ships passing by, causing the evaporator to pour water, or the outside water enters the evaporator. In either case, it will seriously affect the water surface evaporation measurement. Interference, making the measurement accuracy decrease

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