What is a black box and what is it used for? As the title suggests, thank you

The black box is a recording instrument on an aircraft, and one is a flight data recorder. It can record the aircraft's altitude, speed, heading, climb rate, descent rate, acceleration, fuel consumption, landing gear release, Greenwich Mean Time, as well as flight parameters such as aircraft system working conditions and engine operating parameters.

Trouble, thanks!

"Black box" is the common name for flight recorder, which is installed on aircraft and is mainly used for aviation accident investigation, maintenance or flight tests. These include a flight data recorder (FDR) and a cockpit voice recorder (CVR), which are typically mounted in the tail of the aircraft. In 1953, Dr. David Warren of the Australian Research Laboratory invented the world's first "black box".

The black box is not black, not only is it not black, but the shell is painted a conspicuous orange-red color to make it easier for investigators to find. So why is it that as soon as the air crash happened, the public's attention was on the "black box", and the data in it was the key to cracking the entire air crash.

Air crashes are the main driving force behind the birth of the "black box". When an air crash occurs, only the "black box" data can provide investigators with information about the operation of the various systems before the accident. Many air crashes occur in a short period of time, and it is true that there is a lack of investigative information after the pilot and passengers are killed, which also brings great difficulties to investigate the cause of the air crash.

The "black box" can provide investigators with the flight data of the plane at the moment of the crash and some period of time before, and the voice data of the cockpit pilot. It helps investigators analyze the causes of accidents and makes correct accident conclusions.

In 1956, Warren did not get the attention of the Australian aviation industry when he made a prototype of a "black box" that could record four hours of voice and flight records. Eventually, with the help of British air controllers, the project continued. Warren and his team developed a practical "black box" and placed it in a sturdy box that was shockproof and fireproof.

Because when an air crash occurs, it is usually accompanied by a strong impact force and a fire caused by **, and these are the "natural enemies" of the recording data carrier. Dramatically, after a 1960 air crash in Queensland, Australia, Australia became the first country in the world to make it mandatory for all civilian and military aircraft to be fitted with a "black box". Subsequently, the "black box" also began to be popularized.

1. Black box (blackbox) is the common name of electronic flight recorder. An instrument used to record the flight and performance parameters of an aircraft. It is not black, but orange, and does not look like a box, but rather a streamlined container, and is a kind of sealed container the size of a normal drawer, 1 3 to 1 4.

The information recorded by the flight recorder can be used for flight accident analysis, and people can send it to a flight simulator after processing according to the data and voice records recorded before the plane crash, reproduce the process of the accident, and vividly analyze the cause of the accident.

2. The "black box" is one of the special electronic recording equipment for aircraft. The black box is divided into: the pilot's cockpit recorder and the flight data recorder.

The former records the conversation between the driver from after take-off to before landing. Tapes are fireproof, waterproof, and shockproof. The latter records a variety of data while in flight.

The flight recorder is housed in a black metal box that is resistant to high temperatures, high pressures, water and corrosion. The black boxes of modern aircraft have been painted orange or yellow, but they are still customarily called black boxes.

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Analysis: Air crashes have recently become an infectious disease all over the world, and the tragedy of plane crashes has occurred in many countries and regions. While people are looking at rescuing survivors and salvaging the bodies of victims, they are also looking at a device – the black box, which tells us why the plane crashed.

The black box, which is used as a "witness" to the flight condition of the aircraft, is not actually black, but often orange-red. Because it can help decipher the secrets of flight accidents, especially the flight status of the plane at the moment of the crash and some time before the crash, it is called the "black box".

The black box shell is solid and cuboidal, approximately equal to.

Four or five bricks are generally large together. Inside it is purely some electrical components, which are essentially a transceiver. During the flight of the aircraft, it can receive all kinds of information collected by the sensors in the aircraft in time, and automatically convert it into the corresponding digital signal for continuous recording; When a plane crashes, an emergency locator transmitter that relies on a black-fingered box automatically emits a radio signal with a specific frequency rate (e.g., 37 5 kHz), similar to a regular heartbeat, in all directions, to "announce" its position so that searchers can trace it.

In 1974, a Boeing 707 crashed to the bottom of the ocean at a depth of more than 3,000 meters, relying on this radiolocation signal to find the black box. Because of the limited battery capacity in the box, the positioning transmitter usually only works continuously for a few months. If the salvage is not timely, the black box will disappear.

There are usually two black boxes on each aircraft, and their scientific names are "flight data recorder" and "cabin voice recorder" respectively. The former mainly records various flight data of the aircraft, including flight attitude, flight trajectory (track), flight speed, acceleration, latitude and longitude, heading and various external forces acting on the aircraft, such as drag, lift, thrust, etc., a total of about 200 kinds of data, which can retain more than 20 hours of flight parameters. After this time, the data logger automatically spits out the old and the new is overwritten.

The cabin voice recorder mainly records the calls between the crew and the ground personnel, the conversation between the crew members, and various sounds in the cockpit (including the sound of aircraft engine operation). It works like a regular tape recorder, which runs over and over again, constantly recording the last half hour of various sounds. A flight usually goes through 8 stages (takeoff, initial climb, climb, cruise, descent, start approach, final approach, landing), and the situation in each stage is not aimed at the "ear of the black box".

The black box also has a name, but it is actually called the Aviation Flying Digging Balance Line Recorder. Although we are all used to calling it a black box, and rightfully imagine it to look like a black box. But in fact, not only is its appearance not black, but it is also not the appearance of a box.

The real black box is actually a conspicuous orange color, in order to make it easier to search for after the disappearance. And it does not look like a box, but a combination of a cuboid and a cylinder. The reason why it is called the black box is actually because all kinds of electronic instruments in the early airplanes were stored in a black box, which is called a "black box".

Later, after the invention of the black box of "**", it continued to use this name.

After talking about the appearance of the black box, Okawa will talk about the main purpose of the black box.

I believe everyone should be familiar with the dash cam on the car. To put it simply, the black box on an airplane is similar to a dash cam on a car. However, unlike the dash cam, the content and data recorded by the black box are more detailed.

The black box is mainly divided into two parts, the cockpit voice recorder (CVR) and the flight data recorder (FDR).

The former can record the conversation between the pilot and the ground, the conversation between the cabin pilot, the conversation between the crew and the passengers, as well as the sound of the aircraft engine, ** and so on. The latter is used to record various data parameters during the flight of the aircraft, such as flight speed, flight trajectory, latitude and longitude, drag, lift, thrust, etc., which add up to at least 60 kinds of data.

The recording of these sounds and data can help maintenance personnel quickly find problems with the aircraft in order to repair the fault points. When the aircraft has an accident problem, the cause of the accident can be traced.

This is also the reason why after the plane crash of China Eastern Airlines, the relevant personnel must find the black box.

How powerful is the black box?

Generally speaking, no matter how big an accident an aircraft encounters, the black box will often come out unscathed, which is entirely due to the "importance" of the black box. Because the existence of the black box is related to the traceability of the entire aircraft accident, it must not be damaged in any way.

Normally, the black box is often placed in the safest position of the aircraft, that is, the tail part of the aircraft, which is summarized by scientists after a large number of aircraft accident analysis.

Of course, to protect the data inside the black box from being damaged, it is not enough to simply place it in a relatively safe place.

In this regard, excavation and grinding scientists have also been prepared for a long time.

We can see that the shell of the black box is very thick, and it is also a special hard steel, with this strong shell, the black box can withstand the squeezing of a 2-ton object for 5 minutes at one time.

In addition to being strong and compression-resistant, the special design of the black box also gives it special abilities such as high temperature resistance, water resistance, and acid resistance, with these capabilities, even if it is placed under a high temperature of 1100, it can last for at least half an hour, and it can last for several months when soaked in various liquids.