Lever type lysimeter

Abstract

The technical scheme of the invention relates to a lever type lysimeter which comprises a lever system, a measuring system, a container system, a balance weight and a control system. Due to a lever type weighing structure, the weight of a most part of a container system is counteracted, the weight acting on a weighing sensor can be reduced, weight change of a container can be measured by using a sensor of a small measuring range, and furthermore high measurement precision can be achieved; meanwhile, since the structure only counteracts one fixed weight of the container system, and the weight change of the container system is not counteracted or reduced, the weight change of the container system can act on the weighing sensor without change, and measurement accuracy can be ensured. By usingan automatic control technique, automatic measurement and recording of the weight of the container system can be achieved, an article to be measured can be separated from the weighing sensor when measurement operation is stopped, and measurement errors caused by long-term continuous pressure of heavy articles, of the weighing sensor, can be avoided.

Description

technical field [0001] The technical proposal of the present invention relates to a lysimeter, specifically a lever type lysimeter. Background technique [0002] Lysimeter, as an instrument in water resources research, plays an important role in the infiltration and evaporation of water in the soil. However, due to the soil contained in the container of the lysimeter, the weight of the container is often heavy when it is fully loaded. Under normal circumstances, only a scale with a larger range can be used to measure the weight change of the container, but the larger the scale, the greater the minimum division value, and the lower the measurement accuracy. In the conventional technology, small-capacity containers are often used to reduce the self-weight and then use a scale with a smaller range to obtain better measurement accuracy. However, small containers often have a small cross-sectional area and depth, which is difficult to simulate the real situation of the soil. Not...

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Problems solved by technology

[0002] Lysimeter, as an instrument in water resources research, plays an important role in the infiltration and evaporation of water in the soil. However, due to the soil contained in the container of the lysimeter, the weight of the container is often heavy when it is fully loaded. Under certain circumstances, only a scale with a large capacity can be used to measure the weight change of the container, but the greater the capacity of the scale, the greater the minimum division value, and the lower the measurement accuracy.

In the conventional technology, small-capacity containers are often used to reduce the self-weight and then use a scale with a smaller range to obtain better measurement accuracy. However, small containers often have a small cross-sectional area and depth, which is difficult to simulate the real situation of the soil. Not accurate enough

There are also some technologies that use large containers, but at the expense of measurement accuracy

[0003] In short, the existing lysimeters cannot solve the problem of high-precision measurement of large containers

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