Can I send text messages on the plane?

Whether the electrical signals emitted by mobile phones and other electrical appliances will cause damage to the aircraft has not been confirmed so far. However, it is correct to disable all electrical signals that may interfere with the aircraft.

Chen Haozhi, a professor of communication engineering at Nanyang Technological University, said: "In theory, it is possible ... jamming signals will only cause harm, of course, it will not do any good."

Professor Chen explained how the use of electrical appliances affects aviation communication, saying that airplanes always move by signals, such as switching, turning left and right, or going up and down; They are very advanced and can accept the weakest signal.

The consequences of misjudgment are unimaginable.

"They received the start signal, must be accurate. Once disturbed, leading to misjudgment or misleading, it will be different and the consequences will be unimaginable. "

He explained that when watching CNN programs, the sound and images inside are "binary codes"-"1"and "0" are broadcast by satellites (farther than flying planes).

Airplanes receive only binary codes, just like televisions receive satellite signals. If the external signal interferes, the received binary code signal will change from "1" to "0" and from "0" to "1".

"The message codes are'1'and' 0'. If not all "1" and "0" are changed, but some or even one, the message will be changed. This news may be a start signal, ready to start the air traffic controller. "

Professor Chen explained with vivid examples that this is like a musical, and it needs a current switch to control the lights and curtains. Once the switch goes wrong, the situation will be chaotic.

The longer the distance, the stronger the SMS number.

Similarly, to start any aircraft, an electronic switch is needed to give instructions. However, the "electronic switch" is invisible to the naked eye, similar to the logic switch in a computer.

"When you change planes, there is no room for mistakes. If the logic is wrong, the plane will be wrong; That little difference will become a big mistake. "

Professor Chen pointed out that even if electrical appliances are used in the last seat, they are very short from the complex parts of the cockpit, which is potentially dangerous.

For example, he said that Mars is far from the earth, but we can receive its weak signal and even detect the information of Mars with sensitive instruments.

"Since you are on the ground, you can receive a weak signal from Mars. To be sure, the plane in the cockpit can also receive the signal of the mobile phone user. The shorter the distance, the stronger the signal. "

He further said that compared with the signal from Mars, the electric signal transmitted from the airplane seat is very weak. "However, relatively speaking, the distance between the pilot and the passenger is actually very close, and the signal is strong enough to change the logic of the aircraft."

When using a telephone, electrical signals are transmitted through wires and cables, but not all energy sources are limited to wires. In other words, there is radiation outside the wire. These radiations will get weaker and weaker after a certain distance, and finally disappear without a trace.

"However, within a short distance of passenger appliances and airplanes, they are not so weak. Cell phones radiate energy from space. When using a mobile phone, a small antenna radiates energy to distant objects. " Inevitably, some energy is also radiated to the plane. "

Small signals can also cause great damage.

General electrical appliances will use "shielding cover" to avoid or prevent the influence of external signals.

Professor Chen pointed out that general aircraft have shielding covers, but it is impossible to have 100% defense function, because there is still some energy intrusion.

He explained that to some extent, white trousers can protect the body from the sun, but they also reflect the heat energy of the sun.

Shielding is protected by a material, which also reflects external electrical signals. This is also the reason for the lack of defense. Remember, destruction does not need a strong signal; A small signal' running' in will also cause great harm. "

Preview: How to deal with transnational air supremacy?

The man from country X took a passenger plane from country Y and was going to fly to country Z. As a result, he committed a crime in the airspace of country A..

Which country has the jurisdiction to punish men in country X?

X, y, z, or a?

Transnational sanctions for air superiority have always been a complicated and thorny issue. Is China's aviation law sufficient to deal with air tyrants? What preparations has Singapore Airlines made?

Look at the last report in tomorrow's series.

A British man was sentenced to one year in prison for refusing to turn off his mobile phone.

At the end of July this year, the British government drafted a bill to treat passengers who interfere with cabin attendants, including drunkenness, smoking and trouble on board, as criminals.

Aviation experts believe that the radio waves emitted by mobile phones may cause explosions or affect the navigation system of passenger planes flying at an altitude of 9500 meters.

Scientific evidence also shows that using mobile phones on airplanes is indeed potentially dangerous. In Germany and the United States, it is illegal to use mobile phones on airplanes.

The following case shows that someone left others and their own safety behind and used a mobile phone on the plane, and was severely punished as a result.

Whitehouse, a 28-year-old British oil exploration worker, was sentenced to one year's imprisonment by a judge on July 2nd, this year, because he refused to turn off his mobile phone on the plane, posing a threat to the lives of passengers on international flights. This is also an unprecedented judgment.

Whitehouse repeatedly ignored the warnings issued by the flight attendants and refused to turn off the mobile phone. As a result, he was convicted of "reckless negligence, endangering the lives of 9 1 passengers on British Airways". This passenger plane is flying from Madrid to Manchester.

This ruling has a warning effect on the British. Using mobile phones on airplanes and committing violence on airplanes will be regarded as equally serious crimes.

The frequencies are "connected" and the power is fierce.

Why can shaving planes and CD players be used for part of the flight?

Why are cell phones and AM/FM radios completely unavailable?

Professor Chen Haozhi said: Available or not depends on the "frequency" of the object.

He explained that everything has its own natural frequency. Even glasses of the same shape have their own frequencies.

If the frequency of electrical appliances is quite different from that of some aircraft, the interference will be minimized or not interfered at all.

Electrical signals transmitted by mobile phones, computers, radios, etc. In addition to their strength, it will also affect the aircraft. If the frequency they emit happens to be the same as or close to the frequency of the aircraft, plus the amplitude (or amplitude), it will cause the greatest damage and lead to dangerous situations.

"If you connect things with the same frequency, there will be a violent reaction, and' power' can even destroy a bridge and a wall."

For example, he said that people often hear the story that "the soprano sings and the glass is broken", which is the reason.

He pointed out that there is also a story in the Bible that illustrates the same frequency of shock. In ancient times, the priests of Israel blew trumpets and walked around Jericho for six days. On the seventh day, the wall collapsed with the sound of the horn and the shouts of Israel.

Professor Chen said that the frequency of the horn increased and the particles in the air hit the wall, so the wall shook slowly. As time went on, the wall shook more and more violently and finally fell down. This is the "power" of the vibration force.

"Different frequencies have different effects on aircraft. This is why some equipment is classified as dangerous and some as safe. Approved and not allowed to use, in fact, is divided by' high and low frequency'. "

The so-called low-frequency electrical appliances refer to planers, lamps and other electrical appliances; Their period per second is 50 to 100 (per second).

As for high-frequency electrical appliances, they refer to AM/FM radios, mobile phones and so on. They have more than a million weeks per second. For example, turning on the radio to listen to the "ecstasy channel" (FM93.3) means that the number of cycles per second of the radio antenna is 93.3 million.

During the whole flight of the aircraft, the pilot uses airborne radio navigation equipment to keep in touch with the ground navigation station in real time and control the flight route. In the case of low visibility, it is necessary to use the instrument landing system to land, that is, to use the blind landing platform on the runway to send electromagnetic signals to the aircraft to determine the runway position. In the process of playing or answering, the mobile phone will not only emit electromagnetic signals, but also keep in touch with the ground base station in standby state. In its search process, although the time of signal transmission is very short, it has strong continuity. Therefore, the electromagnetic waves emitted by mobile phones will interfere with the navigation system of aircraft, and the impact will be even greater in the case of low visibility. When the plane flies smoothly, it is 6000m to12000m above the ground. At this time, the mobile phone can't receive the signal at all and can't be used. In the process of taking off and landing, the mobile phone may get in touch with the ground base station, but the consequences of interfering with the navigation system at this time are the most serious.

In addition, the flight of modern aircraft is largely controlled by computers, and the lines of computer data transmission are distributed throughout the aircraft. When the mobile phone is used in the engine room, the electromagnetic wave emitted by the mobile phone will interfere with the transmission line and affect the transmission of normal line numbers.

Some people may ask, why did someone use a mobile phone on the plane in the past without serious consequences? This is because there are many factors that affect the interference of mobile phones on the plane. First of all, because each mobile phone has different sensitivity to receive signals and different contact with the ground network, the interference will be different; Secondly, the distance between mobile phone and navigation station and electronic cabin is different, and the interference is also different. However, at present, due to different aircraft models and different positions of the electronic cabin on the aircraft, passengers cannot judge whether they are near the electronic cabin. Therefore, it is clearly stipulated in the Civil Aviation Security Regulations that passengers should turn off their mobile phones, computers and game consoles when boarding the plane.

In addition, do not use two-way paging pagers on the plane.

Cell phones, pagers and laptops are not allowed on airplanes, which is not a new topic. On the plane, these electronic devices in use will interfere with the communication, navigation and control system of the plane, which is a "killer" threatening flight safety. However, there are always some passengers who disregard the life safety of themselves and other people on board, ignore the provisions of relevant national laws and the requirements of airlines, go their own way and treat safety as a child's play.

On August 3rd, Shanxi passenger Li flew from Chengdu to Beijing on China International Airlines flight CAl408. During the flight, Li Yin neglected to turn off the mobile phone, causing factory interference to the aircraft navigation system, causing the aircraft to deviate from the normal route by 30 degrees. Fortunately, the weather was good that night, and the crew found it in time and took remedial measures, which did not affect the flight. The Public Security Bureau of Beijing Capital Airport gave Ali seven days' administrative detention according to relevant laws. It is understood that this is the first incident in China in which the plane deviated from the route and the passengers were detained because the mobile phone was not turned off.

Why do you have to turn off your cell phone on the plane? Relevant persons from the Civil Aviation North China Air Traffic Control Bureau explained. As long as you turn on the digital network mobile phone and enter the Beijing communication network from other places, the mobile phone will automatically register, that is, when the signal received by the mobile phone from the local network reaches a certain level, the mobile phone will automatically transmit the signal at full power, which may cause harmful interference to the normal work of the airborne navigation equipment. During the whole flight, the aircraft has been using airborne radio navigation equipment to keep in touch with the ground navigation station in real time and control the flight route. In the case of low visibility, it is necessary to use the instrument landing system to land, that is, to use the blind landing platform on the runway to send electromagnetic signals to the aircraft to determine the runway position. The mobile phone not only emits electromagnetic signals when dialing or answering, but also keeps in touch with the ground base station in standby state. In the process of its search, although the time of signal transmission is very short, it has strong continuity. Therefore, the electromagnetic waves emitted by mobile phones will interfere with the navigation system of aircraft, and the impact will be even greater in the case of low visibility. When the plane flies smoothly, it is 6000m to12000m above the ground. At this time, the mobile phone can't receive the signal at all and can't be used. It is possible for mobile phones to get in touch with ground base stations during take-off and landing, but the consequences of interfering with navigation systems are the most serious.

In addition, the flight of modern aircraft is largely controlled by computers, and the lines of computer data transmission are distributed throughout the aircraft. When the mobile phone is used in the engine room, the electromagnetic wave emitted by the mobile phone will interfere with the transmission line and affect the normal signal transmission.

Some passengers don't understand: "It's so big, what does it matter if the route deviates a little?" This is a layman's word. The sky is very high, birds can fly, but the plane must fly according to the route specified by the air traffic control department and the designated flying height. Without the consent of the air traffic control department, you can't change the route or altitude at will. The international practice of air route flight is that the vertical interval between two planes should not be less than 300m, the vertical interval between cruising altitude should not be less than 600m, the horizontal and vertical interval between planes should not be less than 8000m, and the horizontal and horizontal interval should not be less than1600m. If the plane deviates from the route, it will destroy the air traffic order, which is very dangerous.

In addition, landing requires high accuracy. When landing, the runway was only tens of meters wide. If the plane deviates from the runway, hundreds of tons of behemoths will suddenly sink into the soil, just like a high-speed car hitting a wall. All institutions are under extremely high pressure, which directly endangers the safety of passengers.

Xing-hai Chen, the captain of Air China 1408 flight, said: "If the plane deviates from the normal route, it will be dangerously close to other planes in the air, which will disturb the air order and bring trouble to the commander. If the weather is bad, the crew may not be able to land normally, with serious consequences. Fortunately, it was found that the danger was timely and the visibility was high, so that an air crash was avoided. "

Article 88 of the Civil Aviation Law of People's Republic of China (PRC) restricts passengers from using portable electronic devices on board, and Article 200 stipulates that violators shall be given administrative penalties for public security or even criminal penalties. Airlines have also added the requirement that passengers turn off the power supply of portable electronic equipment carried on the plane. Electronic equipment prohibited on the plane includes mobile phones, pagers, remote controllers of game machines, amateur radio receivers, notebook computers, CD players, etc.

It is reported that a British oil exploration worker was recently sentenced to one year's imprisonment by a judge because he refused to turn off his mobile phone on the plane, posing a threat to the lives of passengers on international flights. This is an unprecedented ruling. The passenger ignored the warning issued by the flight attendant and refused to turn off his mobile phone. As a result, he was convicted of "endangering the life safety of British Airways 9 1 passengers". The judge believes that this ruling has a warning effect, and using mobile phones on airplanes and using violence on airplanes will be regarded as equally serious crimes.

Combined with the mobile phone incident in China, it is not difficult to see that the international aviation community no longer "focuses on education" for passengers who threaten aviation safety. Those who should be punished should be punished, and those who should be sentenced should be sentenced, because otherwise no one is afraid. This behavior will become more and more serious. Although it is not a knife and gun, it is as harmful as a knife and gun when it happens on an airplane. Aviation safety is not only a matter for airlines, but also for passengers sitting on the plane. In recent years, the number of mobile phone users in China has doubled. When we enjoy the convenience brought by modern communication, we should not ignore the relevant laws and regulations of the country, especially when it comes to the safety of ourselves and others. When you get on the plane, you might as well ask yourself, are your cell phones, pagers and game consoles turned off?

A few days ago, a British oil exploration worker was sentenced to one year's imprisonment by a judge because he refused to turn off his mobile phone on the plane, posing a threat to the lives of passengers on international flights. This is an unprecedented ruling. Whitehouse, 28, repeatedly ignored warnings from the crew and refused to turn off her cell phone. As a result, he was convicted of "reckless negligence, endangering the lives of 965,438+0 passengers of British Airways". This passenger plane is flying from Madrid to Manchester. Judge Anseur told whitehouse in the Manchester High Court: "If you completely ignore your stubborn and ignorant behavior, you will cause panic to passengers." Anseur said that this was the first time that Britain punished people who used mobile phones on airplanes, so he could not refer to previous cases for sentencing. Ensor said that this ruling has a warning function, and the use of mobile phones on airplanes and the violence on airplanes will be regarded as equally serious crimes.

In Germany and the United States, it is illegal to use mobile phones on airplanes. British Airways and the Civil Aviation Authority, which is responsible for the welfare of all British aircraft, welcomed this historic ruling.

China's current civil aviation law also stipulates that passengers are prohibited from using mobile phones on the plane. The flight of modern aircraft is largely controlled by computers, and the lines of computer data transmission are distributed throughout the aircraft. When the mobile phone is used in the engine room, its electromagnetic wave will interfere with the transmission line and affect the transmission of normal signals. In addition, during the flight, the pilot uses the radio system to keep in touch with the tower, and the electromagnetic waves emitted by the mobile phone will interfere with the channel, causing confusion in the air signal. In China, there have been such accidents. Because passengers used mobile phones and laptops too much, the plane deviated from the route and even crashed. It is worth noting that you should not use your mobile phone as soon as you enter the cabin of an airplane. Because although the plane hasn't taken off yet, the pilot is already preparing for taking off and contacting the tower.

In addition, there are car gas stations and hospitals that prohibit the use of mobile phones. According to the person in charge of the infrastructure department of Sinopec Group, it is not advisable to use mobile phones at gas stations. The main reason is that when refueling or unloading oil, the air is high in oil and gas content, flammable and explosive, while the mobile phone is not explosion-proof, with more static electricity, which is dangerous.

It is not advisable to use mobile phones in the treatment areas and wards of hospitals. The electromagnetic waves emitted by mobile phones have great interference to medical instruments. Most wards and operating rooms in hospitals use monitoring systems, such as ECG monitoring, EEG monitoring and electromechanical monitoring. These instruments monitor various physiological parameters of patients. Because the monitor uses digital technology to transmit telemetry signals wirelessly, its working principle is similar to that of a mobile phone. After the monitoring instrument is disturbed, the correct parameters cannot be obtained. If this happens to critically ill patients or surgical patients, the consequences are unimaginable.

The latest "Beijing Road Traffic Management Regulations" clearly stipulates that drivers are prohibited from using mobile phones while driving. Because the use of mobile phones will distract the driver's attention and cause hidden dangers of accidents. During the interview, the reporter noticed that although some relevant departments have formulated rules and regulations to restrict the use of mobile phones in unsafe environments, it is understood that so far, there are no clear penalties for those who violate the regulations.