Who invented the lightning rod? (I was misled for many years!)

Lightning rods are devices used to prevent buildings and other structures from being struck by lightning. Almost all modern high-rise buildings have lightning protection devices. So, do you know who invented the lightning rod? The following editor will give a simple answer to this question.

1. Who invented the lightning rod

Thunder and lightning are the most common natural phenomena on the earth. The invention of the lightning rod has a history of more than 240 years. Due to its protection, countless high-rise buildings have been freed from the threat of lightning, making contributions to human civilization and prosperity.

Our ancestors invented lightning protection devices as early as the Western Han Dynasty and applied them in practice. According to the Records of the Han Dynasty, Weiyang Palace and Bailiang Terrace were hit by lightning and caught fire. Later, an alchemist suggested to Emperor Wu of the Han Dynasty to install "fish" on the roof of the palace to prevent disasters.

For the next two thousand years, this type of metal tile decoration was mostly installed on the roofs of ancient buildings in my country. Although there are no guide wires connected to the ground, this type of tile decoration is higher than the building, so even if it is violently Land mines usually only destroy the tiles but save the main body of the building.

Franklin's most outstanding contribution is to set up a monument in the history of electricity.

His achievement. Created a new era in the history of electricity. Franklin used the famous kite experiment to confirm his view: lightning is a discharge phenomenon.

During a thunderstorm in Philadelphia in June 1752. , Franklin put the kite into the air, risked his life a lot, introduced "celestial lightning" into the Leyden jar, and successfully confirmed the characteristics of lightning. In 1753, he fully studied After understanding the characteristics of "celestial electricity" and conducting a large number of experiments, he discovered the phenomenon of cutting-edge discharge and invented the lightning rod. This was a significant step for mankind on the road to conquering nature. /p>

Lightning rods are very effective in preventing direct lightning strikes. However, with the development of society, the advancement of the times and the widespread use of microelectronic equipment, its limitations have become more and more obvious. The lightning current flowing through the lightning rod and the down conductor into the ground can induce overvoltage in the parallel metal wires nearby, causing damage to electronic equipment. This is the secondary lightning strike effect of traditional lightning rods.

2. Principle of lightning rod

When the thundercloud discharge approaches the ground, the electric field on the ground is distorted, forming a space where the local electric field intensity is concentrated at the top of the lightning rod, which affects the development direction of the lightning leader discharge. , guide the lightning to discharge towards the lightning rod, and then introduce the lightning current into the earth through the grounding down conductor and the grounding device, so that the protected object can avoid being struck by lightning.

Perhaps people think that the lightning rod means that it can be protected. Objects avoid lightning strikes. In fact, on the contrary, the lightning rod is the upper body that "draws lightning". The lightning rod is composed of an air terminal, a down conductor and a grounding body. Lightning protection nets, as well as metal roofs and technical components used for lightning protection. The down conductor refers to the metal conductor that connects the air terminal to the ground body. The ground body refers to the conductor buried in the soil or in the concrete foundation for dispersion.

3. The function of lightning rods

The function of lightning arresters is to protect various electrical equipment in the power system from lightning overvoltage, operating overvoltage, and power frequency transient overvoltage. A damaged electrical appliance. The main types of lightning arresters include protection gaps, valve type arresters and zinc oxide arresters. Protection gaps are mainly used to limit atmospheric overvoltage, and are generally used for the protection of power distribution systems, lines and substation incoming lines. Zinc oxide arresters are used for the protection of substations and power plants. In systems of 500KV and below, they are mainly used to limit atmospheric overvoltage. In ultra-high voltage systems, they will also be used to limit internal overvoltage or provide backup protection for internal overvoltage.

The above is who invented the lightning rod introduced by the editor. I hope it can help you. For more information about who invented the lightning rod, please continue to pay attention to Tubatu Decoration Network.

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