¿¼ÊÔ,ÆÀ¼Û
´òÓ¡±¾ÎÄ ´òÓ¡±¾ÎÄ  ¹Ø±Õ´°¿Ú ¹Ø±Õ´°¿Ú  
·É»úÉϵġ°ºÚÏ»×Ó¡±
×÷Õߣºmaisie  ÎÄÕÂÀ´Ô´£º±¾Õ¾Ô­´´  µã»÷Êý  ¸üÐÂʱ¼ä£º2010-1-4 13:51:26  ÎÄÕ¼È룺maisie  ÔðÈα༭£ºmaisie

 [ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ n' X~ho€osN4gEA(FroG]

·É»úÉϵġ°ºÚÏ»×Ó¡±[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ ?LvX zMNX()&'Ty`!rFroG]

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ #$8eYe~XKEvD cdFroG]

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ 8,0WBz- VvTb& aFroG]

·É»úʧʺ󾭳£±»Ìá¼°µÄÒ»¸ö´Ê¾ÍÊÇ¡°ºÚÏ»×Ó¡±¡£Õâ¸öÊÂʵÉÏΪ³ÈÉ«µÄ¡°ºÚÏ»×Ó¡±ÊÇÓÃÀ´¼Ç¼·É»ú·ÉÐйý³ÌÖÐÒ»Ð©ÖØÒªÊý¾ÝµÄ¹¤¾ß£¬Í¨¹ýÀïÃæ¼Ç¼µÄÏà¹ØÊý¾Ý£¬µ÷²éÈËÔ±¿ÉÒÔ·ÖÎö³öʧÊÂÔ­Òò¡£

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ s)I€!/ c3cPUP$m{FroG]

Black boxes - which are actually orange - are a group of data collection devices mounted in the tail of an aircraft.

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ l@i8IXWH?3$[2u'azFroG]

Under internationally agreed regulations, commercial aircraft must carry the equipment to record the performance and the condition of the aircraft in flight.

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ P?O^fKZF0^[}*e{FroG]

The recorders are housed in immensely strong materials, such as titanium, and insulated to withstand a crash impact many times the force of gravity, temperatures of more than 1,000 deg C for up to 30 minutes and the immense pressure of lying on the seabed.

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ #,Bb-%Ji8AZ,:{FroG]

One manufacturing test for data recorders involves firing them from a cannon into a wall to simulate an aircraft suffering a catastrophic crash landing while traveling at hundreds of miles an hour.

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ lK u AXo$R=i?)xFroG]

The recording material is itself insulated against accidental deletion and the corrosive effects of sea water.

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ Wq@QY}WkcwX[ek-FroG]

Modern black boxes record up to 300 factors of flight including:

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ _w=_[t] +MiCEHFroG]

Airspeed and altitude

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ +Y_Z;Ix"6n9''"6,FroG]

Heading and vertical acceleration

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ Q M -F7 S)h Y(@FroG]

Aircraft pitch

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ CSmt=A/.0$oQ;IP_^FroG]

Cockpit conversations

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ uVE?szLL8$h?)wFroG]

Radio communications

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ *2 FS7€~OvL"s}TFroG]

The safety precautions are designed to ensure, theoretically, that accident investigators will be able to recover the recorders, compile a full picture of an aircraft's last moments from the recordings and then accurately explain what went wrong.

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ T.M7:$h qIla#R_~FroG]

Origins

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ #)Zy=*w'J[q-y1it2whFroG]

Australia lays claim to the development of the flight recorder after one of its scientists dreamed up the concept following the birth of commercial jet aircraft in the 1950s.

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ +Rb= Xg} €@6CDdXFroG]

In 1953, jet flight experts were struggling to understand why a number of Comet airliners had inexplicably crashed, throwing the entire prospect of commercial jet air travel into doubt.

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ UIBWh#73N(z b3SqFroG]

A year later Dr David Warren, an Australian aviation scientist, proposed a flight recording device and by 1958 he had produced the prototype "ARL Flight Memory Unit".

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ sW]DWaqNJqGtQ}FroG]

That first version was slightly larger than an adult hand but capable of recording some four hours of cockpit conversation and instrument readings.

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ Mkh;1€?1)R@u0f%FroG]

To Dr Warren's surprise, the device was at first rejected by aviation authorities as having "little immediate direct use in civil aircraft" while pilots described it as a "Big Brother" spying on their actions.

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ ';Qom~aP6^erzyjYFroG]

On taking the device to the UK, Dr Warren was enthusiastically received and, following a BBC report on the device, manufacturers came forward to take over the project.

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ g\?Q :lwtfJ€pCZ|FroG]

Similar developments had by this stage also begun in the United States and by 1960 the first steps were being taken to make the devices mandatory.

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ ]&(ap-t)Z#`7e8=jFroG]

Computers have now replaced magnetic tape, meaning the devices can record more data and are far more likely to survive an impact.

[ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ KNx6?r,b Tg,^[`4 . FroG]

 [ÎÄÕ°æÈ¨ ½ûÖ¹×ªÔØ:¿¼ÊÔÓëÆÀ¼Û http://www.trgroup.com.cn/te/ m\a@=Sl* n/?Q*jb FroG]

´òÓ¡±¾ÎÄ ´òÓ¡±¾ÎÄ  ¹Ø±Õ´°¿Ú ¹Ø±Õ´°¿Ú