Automatic measuring station for water surface evaporation capacity

Abstract

The invention discloses an automatic measuring station for water surface evaporation capacity, relating to a weather and hydrological monitoring device. The automatic measuring station comprises an evaporation barrel, a water ring, a static water barrel, an evaporation sensor, a rainfall sensor, a water supplementing barrel and an acquisition controller. According to the automatic measuring station for the water surface evaporation capacity, an overflow barrel, an overflow sensor and an electric overflow water-supplementing device in the prior art are omitted, and the static water barrel and the evaporation sensor are endowed with the dual functions of measuring the evaporation capacity and overflow capacity, so that the system is simplified and is simple to install and debug and low in cost, and the measuring errors of the system can be reduced. The evaporation barrel and the static water barrel are connected and communicated with each other by a communicating pipe; and the communicating pipe is in serial connection with a normally-open electric valve. The evaporation sensor is arranged on the static water barrel; an electric draining device is installed at the lower part of the static water barrel; the acquisition controller is used for automatically acquiring water-level information of the static water barrel, and automatically controlling the electric water supplementing device, the electric water draining device and the normally-open electric valve to work according to procedures, and the automatic measurement for water surface evaporation capacity, thus realizing the automatic measurement of the evaporation capacity, the overflow capacity and rainfall capacity of a water surface in an all-weather manner.

Description

technical field [0001] The invention relates to a meteorological and hydrological monitoring device, in particular to an all-weather automatic water surface evaporation measurement station endowed with a still water bucket and an evaporation sensor to measure water surface evaporation and overflow. Background technique [0002] The detection value of water surface evaporation is an important indicator of hydrology, water resources, and meteorological observation, especially in inland areas with low precipitation. The evaporation index directly affects air quality and crop harvest. All countries in the world have invested huge sums of money to build automatic measuring stations for water surface evaporation. my country has promulgated the water conservancy industry standard "Water Surface Evaporation Observation Specification" (SD65-88) and the national standard "Water Surface Evaporator" (GB / T21327-2007). At present, the remote-measuring and self-recording evaporation s...

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Problems solved by technology

[0003] 1. In order to increase the amount of overflow measurement, overflow barrels, overflow sensors and other related equipment are installed. The system is relatively complicated, the production cost is high, and it is difficult to promote and use it.

[0004] 2. The evaporation sensor and the overflow sensor are two independent sensors. During the factory inspection and on-site installation, commissioning and calibration, the two sensors must be inspected, adjusted and maintained separately, and the procedures are cumbersome.

[0005] 3. The measurement error of the system is related to various factors such as the manufacturing deviation of the still water barrel diameter, the measurement error of the evaporation sensor, the manufacturing deviation of the overflow barrel diameter and the measurement error of the overflow sensor, etc., resulting in an increase in the total error of the water surface evaporation system

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