More than 1800 years ago Zhang Heng invents the seismograph “Longkou spits the bead” the phenomenon, today really reappears
in front of the people.
Opens the graduated arm seismograph is in the human history first seismoscope, vanishes mystically in more than 1700 years ago, its outward appearance and the principle become in the people heart for a long time the riddle. Fortunately "Historical Records of the Eastern Han dynasty. Opened the graduated arm biography" to make the record to the seismograph, but altogether only then 196 characters, “......Casts by the refined copper, the diameter eight feet, gather the lid to stick out, take the form of the liquor to revere, play the part of shape of by the seal script tortoise birds and beasts. Center has all the column, approaches line of eight, Shi Guanfa machine. Outside has eight dragons, the title copper pellet, gets down has the toad, opens the horn mouthpiece ......” to act according to this historical data, the Chinese and foreign scientist attempts to recover continuously it.
On February 2, in front of a Henan museum exhibition seismograph internal structure galley proof, reporter saw, starts along with the push-button, accompanies is demonstrating Taiwan's vibration, a ping pong size steel ball is suitable the track “to work as”, drops to following cylindrical iron bucket in. This unites the development by the Henan museum and Chinese Earthquake authority to imitate the earthquake wave the seismograph internal structure galley proof, reappeared the seismograph to examine living shakes the function.
A.D. 132 years, Han Dynasty Zhang Heng has invented in the world the first seismoscope - - seismograph, latter 沦落 the tumultuous times, will become riddle of the eternity. In July, 2004, the Henan museum and Chinese Earthquake authority passes through the near half year attack, has yielded the preliminary result.