1, the principle of sounding balloon

The principle of sounding balloon is to use the buoyancy in the atmosphere and change the buoyancy by changing the volume. When the balloon is filled with gas, the buoyancy of the gas will counteract the effect of gravity, thus making the balloon rise to a certain height. In the process of rising, the volume of the balloon will change with the change of air pressure, thus affecting the buoyancy of the balloon, so that the balloon can fly at high altitude or slowly descend.

2, the role of sounding balloon

As a carrier, the sounding balloon takes the radiosonde into the air. During the ascent, radiosondes measure meteorological data such as temperature, air pressure and air humidity at different altitudes and latitudes, and transmit them back to the ground through radio signals, thus obtaining the values of meteorological elements in the air.

In addition, the wind direction and wind speed at high altitude can be calculated by carrying the latitude and longitude instrument on the balloon or tracking the trajectory of the balloon on the ground.

Use of hydrogen:

1, industrial use

Hydrogen is not only the main industrial raw material, but also the most important industrial gas and special gas, which is widely used in petrochemical industry, electronic industry, metallurgical industry, food processing, float glass, fine organic synthesis, aerospace and other fields.

At the same time, hydrogen is also an ideal secondary energy source. Generally speaking, hydrogen can easily combine with oxygen. This characteristic makes it a natural reducing agent to prevent oxidation in production. In the high temperature treatment of glass manufacturing and electronic microchip manufacturing, hydrogen is added to nitrogen shielding gas to remove residual oxygen. In petrochemical industry, crude oil needs to be hydrogenated by desulfurization and hydrocracking.

Another important use of hydrogen is to hydrogenate fats in margarine, edible oil, shampoo, lubricant, household cleaner and other products. Because of the high fuel characteristics of hydrogen, the aerospace industry uses liquid hydrogen as fuel; Used as raw materials for synthetic ammonia, methanol and hydrochloric acid, and as hydrodesulfurizing agent in petroleum refining.

2. Medical purposes

Therapeutic effect of hydrogen on central nervous system diseases. Since the biological effect of hydrogen was discovered, hydrogen has obvious protective effect on central nervous system diseases and dysfunction represented by cerebrovascular diseases and Alzheimer's disease.