The data of the black box on the plane can't be uploaded in real time mainly for technical and economic reasons, and the plane crash can't be found immediately because the plane crashed without ground control and monitoring, no one can make a judgment at the first time, and the abnormal situation can't be returned in time because of the loss of contact and signal.

The data of the black box on the plane can't be uploaded in real time. On the one hand, it is due to technical reasons:

If the black box is to maintain a solid structure, it must not have too many openings, otherwise it can't stand the beating, soaking and high temperature. In order to transmit data, there must be an opening to connect the data line and install the transmitter, so this is a technical problem that can not be solved for the time being.

on the other hand, if you don't connect the data cable, can you use Bluetooth or other wireless means to transmit data? The answer is no, because the shell material of the black box is made of titanium steel and other metal materials, and it is very thick, and electromagnetic waves can't penetrate at all, so there is no wireless transmission of data.

There is a new technology called cloud synchronization. A reporter from 21st century business herald interviewed experts in related fields about black boxes. According to the data of civil aviation at the beginning of 222, there are about 16, planes flying in the sky at every moment. Even with 1, flights flying at the same time, the data transmission per second reaches 14.3G. Civil aviation experts pointed out that a civil airliner flying at an altitude of 1, meters needs a large number of base stations and satellites to build a ground-to-air network in order to transmit data signals to the ground.

This is also the second economic reason that we have to mention:

If the plane wants to transmit the data in the black box to the satellite in real time, the price will be very expensive, so that economy class is several times more expensive than first class, then almost no one will fly, and the black box and real-time data transmission will be meaningless. Even if Musk's "Star Chain" introduces cabin WIFi service, so many passenger planes flying in the air all over the world have to upload data to satellites. These massive transmission data need to be uploaded at the same time, and the current network can't guarantee normal data transmission at all.

In addition to the fact that the black box data can't be uploaded in real time, it's also a real problem that the plane crash can't be found in the first place.

On March 21st, the reporter learned from Guangxi Emergency Management Department that a Boeing 737 passenger plane of China Eastern Airlines with 133 passengers fell in tengxian, Wuzhou, Guangxi, causing a mountain fire. At present, the rescue team has assembled and is approaching, and the casualties are unknown. After confirmation, it was determined that the MU5735 passenger plane crashed.

So once the aircraft encounters a serious fault and the avionics system of the aircraft stops working completely, those positioning devices are useless and useless. The ground can only get the data of the plane's transponder or ADS-B's last work, so that it can be inferred. Once the plane crashed, it lost contact with the tower, so the plane crash could not be found at the first time.