What is the power source of the subway? Will the subway trap people?

Subway is a form of rail transportation. Friends who have taken the subway know that the subway opens and closes relatively quickly, only about 2 minutes, and sometimes even shorter. When riding, everyone is worried about whether they will be caught by the shield door if they are late. What should I do if I get caught in the subway? What is the power source of the subway? Open it and learn more!

Contents of this article

1. What is the power source of the subway?

2. Will people get pinched in the subway?

3. What to do if you are stuck in the subway

What powers the subway?

The subway mainly relies on electricity.

The subway is a fast, high-capacity urban rail transit mode that has gradually developed along the form of a ground railway system. It uses electric traction and its lines are usually laid in underground tunnels. Some are outside the city center, moving from underground to the ground or on viaducts.

Subway is a form of rail transport, and there are two ways to understand this term:

Refers to an urban rail transit system that operates mainly underground, which is the abbreviation of "subway" or "tube" (Subway, tube, underground); many of these systems may be converted into ground or elevated sections outside the city center in order to adapt to the construction environment and consider construction and operating costs.

Will the subway trap people?

In fact, being caught in a subway door is not dangerous.

Let us first understand the subway door closing anti-pinch safety mechanism.

1. The shielding door will automatically pop open if it catches a foreign object

The first subway door (the door not connected to the subway car) is called the subway screen door.

Before the emergence of platform screen doors, subway platforms were once a "suicide sanctuary". There are several falling accidents in the Beijing subway every year.

The shielding door has an anti-pinch function. It is equipped with a "three-time obstacle detection device". The sensing sensitivity is very high. Once a foreign object is caught, the shielding door will automatically pop open.

2. The doors cannot be closed and the subway cannot start

In addition to the anti-pinch function of the subway screen door, the subway door also has a second protection mechanism "ATP" (subway operation automatic protection system).

In ATP mode, the door opening requires a zero speed signal, that is, the door opening operation can only be performed when the vehicle speed is zero, otherwise the driver's pressing of the door opening button is invalid. Conversely, if the subway train door is not closed, the train cannot run.

Similarly, once the shield door is opened, the subway operation circuit will be automatically cut off and the subway will be unable to operate.

Therefore, if the anti-pinch function of the subway screen door fails, you must try to hold the train door, even if the door pinches your arms or legs, and never let the train door close.

What to do if you are stuck in the subway

1. The best way to prevent people from being caught by the shield door is to not fight or rush. It is better to wait for three minutes than to rush for one second. When waiting for the bus, you must stay outside the yellow line, do not rush up or down, and do not look at your phone or play games.

2. If you are accidentally stuck between the shield door and the subway door, don't panic. There is a handle on the inside of the shield door. Use both hands to pull the handle to both sides. It does not take much force to pull the handle.

3. If you are standing outside waiting for the train and find this situation, you can also pull the screen hard from outside. As long as there is a little gap in the screen door, the subway will brake urgently and cannot start.

4. At the same time, people around can quickly find the emergency brake button nearby, break it and press it.

5. If someone already in the subway car sees this, the first thing to do is to smash the emergency brake button next to the door.