Restored geodynamic instrument, information of geokinetic instrument

There are two popular versions of the structure of the geodynamic instrument: Wang Zhenduo's model, that is, the "Du Zhu" is a cylinder similar to an inverted wine bottle, and the mechanism that controls the dragon's mouth is around the "Du Zhu". This model has recently been largely rejected.

Another model was proposed by Feng Rui of the ** Bureau, that is, the "Du Zhu" is a hanging pendulum (seen in Yuan Hong's "Later Han Dynasty"), there is a small ball below the pendulum, and the ball is located at the intersection of the "m" zigzag slide (that is, the "Guan" mentioned in the "Later Han Shu Zhang Heng Biography"), **, when the "Du Zhu" dials the small ball, the small ball shoots the mechanism that controls the dragon's mouth, so that the dragon's mouth opens. In addition, Feng Rui's model also changed the toad from facing the bottle to facing away from the bottle and acting as the foot of the instrument (see left image). The model has been simulated and tested, and the results are consistent with historical records.

Zhang Heng's instrument has good performance, and he once predicted a ** in Luoyang, according to the record at the time: "The test is like a god." "It can even be measured that it happened thousands of miles away and no one felt the earthquake in Luoyang.

This instrument was not only admired by the people of the time, but also by today's scientists. In the world, it is very frequent, but it can really be observed with instruments, and in foreign countries, it was after the 19th century. The wind and ground motion instrument is the ancestor of the world's most advanced instruments.

Although its function is limited to the approximate location of the epicenter, it has surpassed the development of the world's science and technology for about 1,800 years!

<> "What you said at that time was the official version. Neither of these can be called "restoration". The real restoration is the folk version of the bamboo version. Look at his restoration** to know that this is Zhang Heng's geodynamic instrument restoration.

Kinetic Instrument The geodynamic instrument is another masterpiece of the Han Dynasty scientist Zhang Heng. In the Eastern Han Dynasty in which Zhang Heng lived, ** was more frequent. According to the records of the Five Elements of the Book of the Later Han Dynasty, from the fourth year of Emperor He Yongyuan (92 AD) to the fourth year of Emperor Yanguang (125 AD), a total of 26 major ** occurred.

** Districts are sometimes as large as dozens of counties, causing land fissures, landslides, flooding of rivers, and collapse of houses, causing huge losses. Zhang Heng has a lot of personal experience with **. In order to grasp the national dynamics, after years of research, he finally invented the geodynamic instrument in the first year of Yangjia (132 AD) - the world's first ** instrument.

According to the "Biography of Zhang Heng in the Book of the Later Han Dynasty", the geodynamic instrument is "made of fine copper, with a diameter of eight feet", "shaped like a wine bottle", with a raised round cover, and the appearance of the instrument is engraved with seal inscriptions and figures such as mountains, turtles, birds, and beasts. Inside the instrument, there is a copper "capital column", and there are eight passages next to the column, which become "eight paths". There is a "tooth machine" in the road.

There are eight dragons cast around the outside of the body, with their heads facing down and their tails facing upwards, arranged in eight directions: east, south, west, north, southeast, northeast, southwest, and northwest. The faucet is connected to the engine in the internal tunnel, and each faucet has a copper ball in its mouth. Facing the dragon's head, eight toads squatted on the ground, each with their heads raised and their mouths open, ready to take on the copper ball.

When ** occurs in a certain place, the "capital column" inside the geodynamic instrument is tilted, touching the dental machine, making the faucet in the direction of ** open its mouth, spit out the copper ball, and fall into the mouth of the copper toad, causing a loud sound. So people can know the direction in which ** is happening.

On the third day of the second month of the third year of Emperor Yonghe of Hanshun (138 AD), a dragon machine of the geodynamic instrument suddenly started and spit out a copper ball. At that time, the people in the capital did not feel the slightest sign of **, so some people began to talk about it, blaming the earth for not working. A few days later, someone in Longxi (now southeastern Gansu Province) came to report and confirmed that ** had indeed happened there a few days ago, so people began to be extremely convinced of Zhang Heng's superb skills.

Longxi is more than 1,000 miles away from Luoyang, and the geodynamic instrument is correctly marked, indicating that its seismic sensitivity is relatively high.

According to the research of scholars, Zhang Heng had already used the principle of inertia in mechanics at that time, and the "Du Zhu" actually played the role of inertial pendulum. At the same time, Zhang Heng must have some understanding of the propagation and directionality of the first wave, these achievements were very remarkable at that time, and Europe did not make similar instruments until 1880, more than 1,700 years later than Zhang Heng's invention.

Zhang Heng, a scientist in the Eastern Han Dynasty, because he was in the Eastern Han Dynasty at the time, was too frequent, so he devoted himself to this research and invented the world's first instrument, which is almost a thousand years older than the West, and is the pride of the Chinese people.