At Qi 'an Road Station of Shanghai Metro 15 Line, a middle-aged and elderly lady passenger was caught by the subway screen door and was taken to the hospital for treatment, but she still died unfortunately. According to statistics, Shanghai Metro 15 Line is an automatic line, which was put into trial operation on 202 1 1 23, and the selected line was the most advanced fully unmanned technology in China at that time.
The unmanned technology of subway station is also called ATO, which can complete the acceleration, constant speed cruise, deceleration and accurate parking of the train without a driver, and automatically open the door and platform screen door after parking. The way to accomplish this function is similar to the basic principle of unmanned driving based on map navigation, but the subway station system software is urban track, which is simpler than road safety driving.
Why do subway screen doors pinch people to death? What must passengers pay attention to when taking the subway? "People in the industry are also paying attention to this safety accident." The security guard of a domestic subway company explained. He analyzed: "Under normal circumstances, screen doors are not easy to be strong. If you just get caught in the screen door, you won't die. However, if someone is locked between the screen door and the car, the car will run, causing the staff to be caught. "
He introduced in detail that in most subway stations at this stage, before the train runs, it is obvious that the screen doors are not caught by outstanding talents, so such a thing is unlikely to happen unless the driver is irresponsible. It will happen, but "the accident route is an automatic route, and there is no driver manpower to determine this one, so there are certain risk factors." However, in the case of general interlocking, the screen door is not well related and the train is not easy to run. "
This worker has worked in the security department of subway station for many years. According to the short video of the accident, he basically analyzed that there are probably two reasons for the Shanghai subway accident. "One is a common problem, such as the screen door is not good, but the machinery and equipment are not linked, resulting in train operation; The other is the misoperation of the station attendant. After the staff is arrested, the screen door indicator lights up as an alarm. After the actual operator manually solved the mechanical equipment, the screen door was a common fault, and the screen door linkage was released. Future train operation. " He analyzed that from the current situation of short videos, the latter probability is higher.
He added, "After the screen door is not closed, there will be three restoring forces when everything is normal. If it is not closed correctly after three rebounds, there will be a common fault alarm. However, the public video at this stage has not seen the whole process of resilience. "
In this case in Shanghai, the staff failed to hold the passengers. Judging from their actions, it is very likely that they actually operated the local control panel. Because of the ambiguity, everyone can only infer that it may have hit the manual door, which is convenient for opening the door for rescue. As a result, the train suddenly ran and the female passengers were brought into a narrow gap.
The switch button on the wall of the station entrance is really a lifesaver. This is an emergency stop button (ESB). Once pressed, the train will brake urgently and will not restart, and the subway station will continue to be banned, and other cars cannot enter. Unfortunately, it can be avoided if the staff can press the emergency brake first and then actually operate the screen door.
When we are in the elevator, sometimes the door of the elevator car is about to close. When we can't keep up, there are always people who use all kinds of objects: hands, feet, designer bags … to stop the door from closing. We sometimes carry this habit when we rush to the subway station. In order to catch up with this subway station better, at the moment when the door is gradually closed, we use the objects in our hands to block the door from closing, thinking that we can successfully squeeze into the carriage. This is a dangerous gesture! Very dangerous!
In view of the subway screen door, four misunderstandings are very easy to occur:
Myth 1: The screen door will rebound if it is blocked. Usually, when we are in the left and right elevator car, if the elevator door is about to close, everyone will put their hands between the double doors, and the elevator door will be reopened after magnetic induction. However, the subway screen door will only rebound when it encounters an object with a thickness exceeding the limit. The screen door of a subway station may be very different from the elevator door.
Because the size of the hand is different from the total touch area, when we reach out to isolate the screen door, the subway screen door may not have a certain magnetic induction. At this point, the screen door is not easy to bounce back, but will stubbornly close again, causing unnecessary harm. So don't put the door handle in the middle of the screen door!
Myth 2: The screen door will open completely after it is blocked. Imagine that if the screen door is completely opened after magnetically sensing the object, the surrounding passengers are likely to "take the opportunity" to enter the train, then open it and re-enter. In a subway station with a large flow of people, such opening and closing are likely to be repeated many times, resulting in train delays and endangering operational safety. Therefore, when encountering obstacles, the subway screen door will be opened again, so that the guarantor can immediately clear the obstacles and ensure that the train can leave the station as planned.
Myth # 3: Screen doors don't stop opening and closing. Screen doors and tunnel doors have two anti-pinch caches. After bouncing back three times, if there is any obstacle again, the screen door will open completely. As long as one door is not closed, the train will not run easily. It will stop at the entrance of the station until all the doors and screen doors are closed. Therefore, during the rush hour, everyone's behavior of grabbing people and individuals will actually increase the travel time.
Myth 4: You can get on the bus safely as long as you squeeze into the screen door. Some passengers think that you can successfully squeeze into the car by squeezing into the screen door. But this happens to be the most risky, because you are likely to be trapped between the screen door and the car door.
Although the screen doors of all subway stations are equipped with modified obstacle detection and protection equipment to prevent workers from being trapped between the screen doors and the doors, this behavior is really too dangerous. So when the alarm sound of "Didi Didi" comes from the door and the yellow light flashes, it means that the door is about to open or close. Please stay away from the door.
So, here, I also remind everyone: when the door is about to close, if you can't get on the bus, please wait carefully for the next bus. You don't have to forcibly close the screen door to enter the car. Safe travel starts from yourself!