Why do you have to look for a black clip after an accident on the plane, what is a black clip?

What is a black box.

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 box automatically emits a radio signal with a specific frequency (e.g., 37 5 kHz), similar to a heartbeat, in all directions, to "announce" its position so that the seeker can trace the wave.

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 each stage is not aimed at the "ears" of the black box.

It can be said to be a recording instrument, which records all the data of the aircraft during flight, such as flight parameters, flight altitude, flight time, and other important data of other components.

You're wrong, it's a black box. The "black box" is one of the electronic recording devices dedicated to aircraft, and its real name is Aviation Flight Recorder. It is equipped with flight data recorders and cabin sound recorders, and all mechanical parts and electronic instruments of the aircraft are connected to them by sensors, just like the nerves in various parts of the human body communicate with the brain.

It can record the relevant technical parameters and the sound in the cockpit half an hour before the plane stops working or crashes, and re-releases the recorded parameters when necessary for flight experiments and accident analysis. The black box has strong resistance to fire, pressure, shock and vibration, seawater (or kerosene) immersion, magnetic interference, etc., even if the aircraft has been completely damaged, the recorded data in the black box can be preserved intact. All the causes of air crashes in the world are found through the black box, so it has become a witness to the accident and a "lesson from the past" to avoid the same accident and take better safety measures.

I'm sure you've heard on many news** that there is a mysterious object on the plane, the black box. Especially when a plane crashes, the black box is always the key to solving the puzzle. I'm curious, how did the black box on the plane come from?

Black Box is a flight recorder ; It is usually installed in the part of the aircraft that is most likely to remain after a crash in the tail.

The black box is divided into two.

Flight data recorder: refers to the device used in the flight recorder to record the aircraft's system, performance and environmental parameters. Cockpit voice recorder: refers to the device used in the flight recorder to record the voice in the cockpit.

By the way, the black box is actually orange.

Relatively easy to find.

In addition to the precise data recording function, the black box must also withstand high pressure and high temperature in order to survive in the condition that the aircraft is dropped, hit or dropped into the deep sea at high speed. It must be able to withstand temperatures of at least 1100 degrees Celsius for 30 minutes to survive the harsh environment of high-speed friction and heat generation when the aircraft is burning, burning or falling; It must also be able to withstand the pressure of about 6,000 meters of water. The black box must also have the ability to automatically send out signals under the high voltage of the deep sea, and its battery must be able to supply power continuously for 30 days after the crash.

Another function is to record the data on the aircraft, mainly used to monitor whether some hardware facilities on the aircraft have undergone some changes after takeoff, this time is relatively long, generally the longest time can be as high as 25 hours, and then these records will be erased. However, this time is enough to use, as the longest flight will not exceed 25 hours. The black box can continue to send signals to the aviation authority for 30 days after the plane crash.

After an air crash, the plane often disintegrates or even burns down in flames. When people go to the scene for rescue, they will always look for something, its name is already familiar to everyone, by the way, this is known as the black box of the "witness" of the air crash. It can provide investigators with evidence to help them understand the truth about the accident.

In fact, the black box is a recording instrument on an airplane, 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. The other is the cockpit voice recorder.

It is actually a radio call recorder that can record all kinds of calls on the plane. The four audio tracks on this instrument record the conversation between the pilot and the ground command organization, the conversation between the principal and co-pilot, the captain's and stewardess's threats to the passengers, the abnormal engine sound, and various sounds in the cockpit. The black box provides investigators with information about the operation of the aircraft's systems prior to the accident.

Because air crashes occur in a short moment, sometimes the pilot and all flight attendants are killed at the same time, it will be very difficult to investigate the cause of the accident, and the flight data recorder can provide people with the moment of the plane crash and the period before the crash, the flight status of the aircraft, the working conditions of the equipment on board, etc. The cockpit language recorder can help people analyze the cause of the accident according to the various conversations of the people on board, so as to make the correct conclusion about the accident. In order to withstand the violent impact and high temperature flames of the plane crash, the shell of the black box has a thick steel plate and many layers of thermal and impact protection material.

And in order to be as safe as possible, the black box is usually installed in the safest part of the tail of the aircraft, that is, the part that is least vulnerable to damage in the event of a crash, in the event of a crash, the black box can withstand 30 minutes of barbecue in the flame of 1100, can withstand the squeezing of 2 tons of objects for 5 minutes, can be soaked in gasoline, oil, oleace, batteries, acid, seawater for several months, in short, it can survive in many harsh conditions. Even with this protection, the black box was damaged in some air crashes, so the international aviation agency set stricter standards, and the recording medium was improved from a tape type to a static storage recorder that could withstand a greater impact, similar to the memory chip in a computer.

In fact, the black box is not black, in order to make it easier for people to search, it is painted a bright fiery red, perhaps because people think that the contents stored in it are of great significance to the identification of aircraft accidents, it is too mysterious, so such an equally mysterious name is used - "black box".

The only evidence that records the flight condition of the aircraft, and the rest is difficult to preserve, especially in poor environments.