In the spring, heavy rain, such as heavy rainfall, is also worth our attention. Spring rains are often accompanied by strong winds, thunder and lightning, and other meteorological features. This bad weather will cause great difficulties in driving safety. Here we introduce a little bit about the safety knowledge of driving lightning protection in rainy days.

1. The necessity of lightning protection

Lightning is a phenomenon of natural discharge in the atmosphere, which has great harm. Lightning can cause electrical

Equipment damage, casualties, damage to buildings, vehicle damage, etc. Severe lightning can also cause fires and explosions. Therefore, it is necessary to understand the destructive effects of lightning in order to do preventive work.

The destructive effects of lightning can be roughly divided into three types: electrical damage, thermal damage, and mechanical damage.

Destruction of electrical properties: Lightning can generate up to tens of thousands of volts or even hundreds of thousands of volts of inrush current, which can damage the insulation of electrical equipment such as generators, transformers, and breakers. Once the insulation is damaged, it can cause short circuits, which can lead to fire or explosion. An accident occurred.

Destruction of thermal properties: When tens of amps or even thousands of amps of strong current pass through the conductor, a large amount of heat will be generated inside the conductor in a very short time. The huge amount of heat can reach the ignition point of the general material in a short time, so it is in thunder and lightning. The high temperatures generated in it often lead directly to fire.

Destruction of mechanical properties: Due to the thermal effect of lightning, it can cause a great deal of pressure inside the object that is struck by lightning, but the object being hit is seriously damaged or caused an explosion.

When a car is struck by lightning, it is easy to cause damage or serious damage to the electric circuit. What's more important is that people in the car must not only damage the electric circuit or cause serious damage during lightning strikes, but more importantly, the personnel in the car must not only To protect the safety of vehicles when lightning strikes in the local language, special attention should be paid to protecting personal safety.

2. Urban rain and lightning strikes

In the case of thunder and lightning weather, in order to ensure the safety of vehicles and personnel, we should try not to drive outside and drive.

When a sudden thunderstorm occurs, the speed should be slowed down, try to avoid parking, and do not avoid under the big trees and billboards. Sudden thunder and lightning hit these objects and dump them to the car. In addition, it is advisable to park cars in indoor areas and avoid parking in high-rise outdoor parking buildings. In order to reduce the risk of the car being struck by lightning, the owner should close the indoor antenna and turn off the car stereo so as not to cause the car to be led into the car by the lightning, causing the circuit fault of the car.

3. Lightning strikes on the outskirts of the country

When it is raining in the suburbs, the surrounding roads are open and the vehicles are more vulnerable to lightning strikes. In-car personnel should

Close the window, do not put the body out of the car, and try not to use the phone, because the signal magnetic field of the mobile phone will change when thunder, powerful lightning will produce a strong electromagnetic field around the release process, it is likely to cause movement Equipment damage or casualties.

4. In this situation, the industry expert advice

1) Identify the signal of the arrival of lightning

A. During the driving process, dark clouds are seen and clouds are gradually accumulated. In this case, lightning may occur.

B. I was listening to the radio when I was driving in rainy weather. When I heard a harsh noise, it means that there may be lightning nearby.

C. When driving in rainy weather, lightning strikes may occur when the hair of the person inside the vehicle rises or the skin vibrates.

D. When the driver saw the lightning, he judged the distance of the thunder center by seeing the interval between lightning and hearing thunder. If the interval is long, it means that lightning is far away, and vice versa.

2. Common types of lightning strikes

Usually, we divide it into direct lightning and induced lightning according to the different roles and principles accumulated:

A. Direct lightning is lightning strike directly on the object being hit. The powerful thunderbolt produces a powerful thermal effect after being hit by an object, which has a destructive effect on the object being hit.

B. Inductive lightning means that when a thundercloud arrives, all objects on the ground, especially conductors, accumulate a large number of binding charges that are opposite to those of lightning because of electrostatic induction. After thundercloud discharge, the lightning charge becomes free charge, which generates a very high electrostatic voltage, and its voltage value can reach hundreds of thousands of volts. This kind of voltage will often discharge the conductor, bad metal objects on the ground and a large number of metal devices. Causes sparks that can cause fires, explosions, and endanger the safety of people and property.

According to the structural characteristics of the car, it is generally believed that the car itself is a closed metal body with a shielding effect, and has a good protection effect on the people in the car when a lightning strike is encountered. However, it does not mean that the car will not be struck by lightning, and the exterior of the car will become a charged body when it is struck by lightning, and it is prone to danger.