An Automatic Measuring Device for Water Surface Evaporation Eliminating the Influence of Precipitation
A measuring device, a technology of water surface evaporation, which is applied in the direction of removing a certain component and weighing, etc., can solve the problems of difficult measurement or quantitative description, low water surface evaporation intensity, low degree of automation, etc., and achieves simple structure, high automation level, Inexpensive effect
Active Publication Date: 2019-01-01
INST OF GENETICS & DEVELOPMENTAL BIOLOGY CHINESE ACAD OF SCI
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Problems solved by technology
Although the measurement accuracy of these two methods is relatively high, they are difficult to measure or quantitatively describe the change process of water surface evaporation on a short time scale due to the low intensity of water surface evaporation, and their own degree of automation is relatively low.
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[0020] The following examples illustrate the invention in detail. Various raw materials and various equipments used in the present invention are conventional commercially available products, and can be directly obtained through market purchase.
[0021] (1) The present invention is equipped with a group of solar power supply devices as the system energy source, which is composed of a 50W solar panel, a 10A solar charge controller, a 48AH battery, and IN9-18V, OUT12V DC stabilized power supply modules.
[0022] (2) The diameter of the evaporator is 20cm, the tare weight is 0.25kg, and the height is 12cm. It is located on a support 70cm from the ground, and there is a load cell under it. The range of the load cell is 10kg, and the sensitivity is 2.0mv / v. The resolution is 0.417kg / mv, 13.27mm / mv.
[0023] (3) The power supply of the data logger is DC24v, with 4 voltage signal input channels (one of which accepts the voltage signal output by the load cell), 4 relay alarm output c...
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Abstract
The invention discloses a water surface evaporation automatic measurement device for eliminating rainfall influence. The water surface evaporation automatic measurement device structurally comprises a weighing device and an evaporator arranged on the weighing device, and the evaporator is communicated with a water storage pool on the ground through a direct current water pump and a water conveying pipeline. An automatic blocking system is arranged beside the evaporator and comprises a time program controller, a rain drop sensor arranged at the signal input end of the time program controller, a direct-current gear motor arranged at the signal output end of the time program controller, a rotary rod in rotating connection with a power output shaft of the direct-current gear motor, and a blocking plate fixedly connected to the tail end of the rotary rod. The area of the blocking plate is smaller than that of the top end of the evaporator. According to the device, the water surface evaporation amounts within different time frames can be automatically measured, and the advantages of being high in automation level, simple in structure, convenient to use and cheap are achieved.
Description
technical field [0001] The invention relates to the technical field of ecological environment monitoring, in particular to an automatic hydrological evaporation measuring device. Background technique [0002] Evaporation of water surface refers to the process of water on the water surface transforming from liquid to gaseous state and escaping from the water surface. The research on water surface evaporation dates back to 1687, when the astronomer E. Halley used an evaporator to observe the amount of evaporation on the water surface. In 1802, Doyle J. Dalton proposed that the evaporation amount is proportional to the water vapor pressure difference. In 1915, W. Schmidt applied the principle of heat balance to determine the evaporation of the ocean surface. In 1939, Sandthwaite and Holzman (C. W. Thornthwaite & Benjamin Halzman derived the mass transfer method to calculate the evaporation formula. Around 1920, some scholars spread monomolecular films on the water surface to te...
Claims
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IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 曹建生齐永青沈会涛刘毅
Owner INST OF GENETICS & DEVELOPMENTAL BIOLOGY CHINESE ACAD OF SCI