Who invented the first instrument to monitor earthquakes? What principle does he use?

Zhang Heng invented the world's first instrument for measuring earthquakes. What's its name? Seismograph? . 1322, scientist Zhang Heng invented the world's first instrument for measuring the direction of earthquakes, called? Hou Feng seismograph? . At that time, Zhang Heng placed a post-typhoon seismograph in Luoyang, the capital.

When it comes to Zhang Heng, you have to mention it? Waiting for the wind To know that the Eastern Han Dynasty was an era of frequent earthquakes, Zhang Heng developed the world's first instrument for measuring earthquake orientation. When the seismograph receives the seismic wave, the copper column in the center will tilt towards the source direction, driving the beam connected with it. The beam will push the faucet to Longkou, so that the copper beads in Longkou will fall into the mouth of the toad below, thus accurately monitoring the direction of the earthquake. This is a kind of pre-Europe? First one? Seismograph has a history of 1700 years.

At the same time, Zhang Heng is also an astronomer, and his book Lingxian is the earliest astronomical monograph in ancient China. Zhang Heng expounded the formation and structure of the sky, the origin and evolution of the universe, the nature of the sun, the moon and the stars, and made an accurate explanation for the first time, which greatly improved the level of ancient astronomy in China and made it walk in the forefront of the world.

1 March, 8381day (February 3, Han Yonghe), a faucet on the seismograph suddenly started, and the copper beads facing northwest fell into the toad's mouth under the instrument. A few days later, Longxi Post Station rushed to Beijing non-stop and told The Paper that a 6.5-magnitude earthquake had occurred in two counties. Longxi is located in the northwest of Luoyang, and the facts are in front of us. Everyone has to admit that the seismograph after the wind is really useful, and many people are amazed at Zhang Heng's invention. It took Europe 1700 years to invent it? First one? Seismograph, and Persia didn't have a similar seismograph until 1 1 century. However, the appearance of seismograph was related to the social conditions at that time. The ancients used their wisdom to prove that earthquakes were foreseeable. Due to the poor communication conditions at that time, people needed several days to predict and respond to the people. Besides, earthquakes and other disasters are not common, so people don't know much about seismographs.