Measuring Method of Water Surface Evaporation Based on Stress-Strain-Electrical Signal Relationship

Abstract

The invention discloses a method for measuring water surface evaporation based on the stress-strain-electrical signal relationship. A measuring device for water surface evaporation is provided, which is composed of an evaporating dish, a resistance strain gauge and a signal acquisition system. The evaporating dish is made of stainless steel, with an inner diameter of 20.0mm, a height of 10.0mm, and a wall thickness of 2.6mm. The resistance value of the resistance strain gauge is 350, the structure adopts the uniaxial strain gauge, and the wire grid length of the strain gauge is 1.0mm. The signal collector is composed of a communication connection line and a computer terminal; through this device, real-time measurement of evaporation on the water surface can be realized. The method is simple in principle, convenient in operation, strong in adaptability, accurate and reliable in measurement results, and can provide convenience for research and application in related fields.

Description

Technical field [0001] The invention belongs to the technical field of meteorological monitoring, and particularly relates to a method for measuring water surface evaporation based on the relationship of stress-strain-electrical signals. The method is suitable for agriculture, forestry, meteorology, scientific research and other relevant departments. Background technique [0002] Water surface evaporation is one of the main meteorological parameters monitored by most weather stations. It refers to the amount of water that evaporates and spreads into the air in a certain period of time. It represents the characteristics of land surface water evaporation and is an important component of the water cycle. In recent years, with the intensification of global climate deterioration such as the greenhouse effect, it has attracted widespread attention. In particular, the study of evaporation, which is one of the important factors affecting climate conditions, has become more and more import...

AI Technical Summary

Problems solved by technology

At present, the measurement principles of the mainstream small evaporator devices mainly include the weighing principle and the ultrasonic principle, and they all have certain limitations.

Among them, the ultrasonic principle mainly has the following limitations: (1) the error caused by human operation is large, and the measurement accuracy is low; (2) the measurement is inaccurate in the sub-zero temperature environment; (3) when the device is empty (no water), easy to damage sensor

Although the weighing principle overcomes the limitations of the ultrasonic principle, there are still limitations in the measurement principle, that is, most bird-proof covers (such as a wire mesh ring that expands outwards into a trumpet shape on the upper part of the mouth) cannot completely prevent birds from flying. The inaccurate measurement is caused by the touch of the load cell

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