How to prevent lightning strikes in summer?

In thunderstorm weather, if you are outdoors, you should immediately look for shelter, such as concrete buildings with lightning rods, steel frames or steel plates, and vehicles with complete metal compartments; If you can't find a suitable lightning protection place, you can squat down with your feet together, put your hands on your knees, lean forward, and never lie on the ground, in trenches or pits. If you wear a raincoat, the lightning protection effect will be better.

█ During lightning, it is best not to ride horses, bicycles and motorcycles; Don't carry metal objects in the open air; Do not approach any part of lightning protection equipment; Don't use the mobile phone.

█ If you happen to be at home during heavy lightning, it is recommended not to venture out without special needs; Close the doors and windows; Try not to use radios and televisions with external antennas, and don't answer the phone.

█ If you are traveling in the wild, don't be close to the open area or the lonely trees on the top of the mountain, which are most vulnerable to lightning strikes; Don't stay in open waters and boats; At the edge of tall trees and forests, around wires and flagpoles, near tall objects without lightning protection devices, such as haystacks and tents, near huge metal objects such as railway tracks and long metal railings, at the top of mountains and commanding heights, etc., you can't stay. In addition, people in the wild should be separated by several meters, so don't crowd together, or they can hide in bigger caves.

When your hair stands up or your skin vibrates, it may be that lightning struck you, so you should fall to the ground immediately. People who are struck by lightning may be burned or severely shocked, but they will not be prosecuted and can receive treatment safely.

█ Lightning protection knowledge of electrical equipment: It is not recommended to use electrical equipment without lightning protection facilities. If possible, lightning arresters should be installed at the entrance of power supply, at the entrance of cable TV antenna, telephone, fax machine, computer modem and cable interface of satellite TV (sold by Taizhou Huafeng Technology Development Service Company), and a good grounding network should be installed. In thunderstorm weather, avoid standing under the lamp cap line when turning on the light indoors; When there is lightning, don't turn on radio and television, the outdoor antenna should be grounded or unplugged, and try not to use electronic equipment such as home computers.

█ How to protect against lightning when traveling in the wild;

Thunderstorms are inevitable during the trip. If you are struck by lightning while walking, you should pay attention to preventive measures and look for lightning protection as soon as possible. There was a thunderstorm in a football match in South America, and several players were killed by lightning. Lightning stroke is a threat to tourism safety. To this end:

(1) When traveling outdoors or in the wild, when a thunderstorm is coming, stop activities and look for the nearest lightning protection places, such as caves and houses. Don't walk in the rain with an umbrella with a metal handle, and don't touch rails, wires, etc.

(2) If you are at the top of the mountain, leave the highest point quickly. If it is too late to find a suitable lightning protection place in an open place, you should quickly get down on the spot and try to put dry insulation under your body, such as raincoats and plastic sheets. If conditions do not allow, you can also squat down, put your limbs together, put your hands on your knees, try to reduce your height and contact area with the ground, and put insulation (such as plastic sheets and rubber items) on your feet. When there are many people, disperse and don't crowd together.

(3) Avoid the terrain vulnerable to lightning, such as tall trees, telephone poles, forest edges, houses along the bottom, hilltops, open water and vast Yuan Ye. If you swim in the water, hurry ashore, dry your body and seek lightning protection.

(4) It is generally safer indoors. Close the doors and windows when encountering a strong thunderstorm. Television, telephone, computer and other electronic equipment are best used sparingly, and it is safer to turn them on after a strong thunderstorm.

(5) For those who are injured by lightning, they should be disinfected and bandaged according to general burns at the scene, and those who are seriously injured should be treated as electric injuries, so they need to be sent to the hospital for treatment and observation.

In summer, in addition to sunny and hot weather, there will be strong convective weather such as thunderstorms and strong winds. Lightning accidents also occur frequently.

█ Lightning disasters are prone to occur, commonly known as ground lightning. We must first understand how it is formed.

Thunderstorm weather, there is a lot of airflow in the sky, which of course also drives the movement of clouds. Friction in motion makes clouds carry different kinds of charges. If the charged cumulus is close to the ground, it will also be charged by electrostatic induction (unlike the lower layer of the cloud). When the charge reaches a certain level, cumulus clouds will discharge to the ground, which is a ground mine prone to disasters. Generally speaking, where there are protrusions on the ground, it is easy to discharge from there, so we all know that we can't take shelter from the rain under the big tree.

What principles should be followed for lightning protection when lightning strikes?

First, don't make yourself a sharp edge, that is to say, try to lower your height, and don't carry metal objects such as shovels, hoes and golf clubs over your head, because this will increase the chance of being directly hit by lightning. If there is nothing higher than yourself around, it will be dangerous to open an umbrella. During the lightning, it is best not to ride a horse, bike, motorcycle or tractor in a flat open area, because you may become a prominent object in the surrounding environment and attract lightning strikes.

Second, try to reduce the contact surface between the human body and the ground and reduce the harm of step voltage. According to the first requirement, the best way is to find a ravine or depression, and squat on the flat ground with your feet together when necessary. You should be careful not to support the ground with your hands, put your hands on your knees at the same time, keep your chest close to your knees and keep your head as low as possible, because your head is more vulnerable to lightning than other parts of your body. People should bend down and squat together. )

Third, outdoor ball games are not suitable. Playing outdoor ball games in thunderstorm days is easy to cause serious consequences of group death and group injury, which has been proved by many examples of lightning disasters abroad. 1On September 20th, 993, four players were killed in a football match near Kuala Lumpur, Malaysia. Therefore, the World Cup Organizing Committee will install a large number of advanced lightning protection equipment in the main football fields of the host country.

If you feel ants crawling on your head, neck and hands, and your hair stands on end (it has been electrostatically induced by clouds), you should get down on the ground quickly to reduce the risk of being struck by lightning, and take away the metal ornaments, hairpins and necklaces you wear.

Risk avoidance skills

1, it is best to carry non-metallic rain gear when going out, such as plastic raincoat, wooden handle or umbrella with plastic handle.

2. Avoid running in the rain when it thunders, because the stepping voltage through the body is large when the steps are big, which is easy to hurt people.

In the suburbs, it is best to hide in buildings with metal doors and windows or lightning rods, or in cars with metal bodies. Once these buildings or cars are struck by lightning, their metal frames or lightning protection devices or the metal itself will lead lightning current into the ground.

If you happen to be in a dense forest, you'd better find a clearing in the forest, choose a place as far away from the surrounding trees as possible, and squat down with your feet together. At this time, because the tall trees are vulnerable to lightning, the rain shelter in the open area is protected.

When there is lightning, it's best not to go fishing, boating or swimming in lakes, rivers and seas, because electric conductors such as lakes, rivers and seas are easy to attract lightning.

In addition, computer lightning protection measures:

First of all, it is important to ensure that the computer has a good grounding. Because if lightning strikes the equipment, the current generated by lightning will be introduced into the earth along the grounding lead, which can effectively prevent the damage caused by lightning and minimize the damage.

Secondly, don't surf the Internet in a thunderstorm, don't use a modem or ADSL equipment, and disconnect the telephone line. Because even if your computer has a good grounding, lightning is likely to invade the inside of the equipment along the signal line, destroying the chip, interface and internet access equipment of the computer motherboard, causing failure. Like COM port and modmen on the motherboard, it is easy to be damaged by lightning.

Finally, the easiest way is to unplug the computer when it thunders, so that the computer can be completely separated from the power supply and signal line.