I want to know the information of Sina.

Compass is a tool to indicate the direction. There are two kinds: one is a geomagnetic compass based on the polarity of the earth's magnetic field, but the north-south direction indicated by this compass is different from the real north-south direction, and there is a magnetic declination; The second is the electronic compass, which adopts the magnetic resistance (MR) technology of the magnetic field sensor, which can correct the magnetic declination problem well and has been widely used in GPS positioning equipment. Formerly known as China, one of the "Four Great Inventions of Ancient China", Sina. Widely used in navigation, field exploration and other fields. Directory [hidden] 1 related history 1. 1.2 Discovery of magnetic declination 1.3 Modern compass 2 Reference 3 External link [Edit] Related historical compass was first used for surveying and navigation in Chinese civilization circle, and it is generally believed that it originated in China in the west, without much objection. [Editor] The earliest form of Sina compass is called Sina. In the Eastern Han Dynasty, Wang Chong (AD 27 ~ 97), the principle of "SiNa's shovel, which is thrown to the ground, is guided" in Volume 17 of Lun Heng. He can only say that this is also natural. Although this record is not the earliest, it is the first one to be clearly stated. There should be no objection to using Sina as a direction, but the specific shape is controversial. Early researchers judged that natural magnets were used as matching positions for spoons. Although there are Sina spoon maps unearthed from Han tombs in Nanyang, Henan Province and Eastern Han tombs as evidence, after all, there is no complete supporting excavation. Recently, someone has studied the word "Sina's ladle". It seems that the ladle of "its guide" does not refer to the handle of the ladle.

Sheng restaurant also. -"Shuowen" resin rose

Sit down and drink. -Li Yi has a private car. The wine is clear. -Reflections on the Book of Rites Quli

Choose the good and do the "Spring and Autumn Ram Biography" Xi Gong (from the first year to the thirty-third year) "Who is begging for the alliance? Please put it where it belongs. Where is it? Where is it? Cover it up. " Consider the past and reduce it. -Hong Qing and Ji Liang's "Zhi Ping Pian" means "root" and "root".

Benya -"Erya Shi Yan" is the same.

So was Ben's birth. Everything is done by Han Feizi for the elderly. Although History of Zou Yang Biography cannot deny that Wang Chong has a "magnet as the key to cooperate with the site", what Wang Chong knows about Sina is probably a floating Sina. Because China is the original invention of Sina, Sina has many improved forms, such as reclining, hanging, floating, spire and so on. , first seen in the Song Dynasty Zhu's Nautical Records. Zhou Ping Ketan was written in111year-119 years, but it was about1086 [/kloc-]. This is more than a century earlier than the statement in12007 A. Neckam's On Instruments: "When sailing, the sun is covered by clouds during the day, or when the direction is unknown at night, rub the iron needle with a magnet, and when the needle stops, it refers to the north and south." Almost at the same time as Britain, France and later Italy also recorded the first compass. In addition, the floating Sina can also be used for navigation, because it is not as easy to overflow as some people think. Recently, floating Sina made of Ming dynasty porcelain was found in Qingdao and Hainan, with a size as large as: the maximum outer diameter is 9.5 cm; There are concentric circles containing water, with a hole diameter of 4.4 cm and a hole depth of 2.3 cm. The periphery is marked by blue and white glaze, and the base and walls are thick and solid. I guess it's water collection. Add water when you use it. The basic principle of modern liquid compass is similar, but the sealing technology is improved. zh。 *** /w/index？ Title =% E5% 8F% B8% E5% 8D% 97 & Variant =zh-

Sina: Sina was China's early compass, which was widely used during the Warring States Period. It consists of a spoon made of magnets and a cotton swab. Wiping is a compass. The square wooden plate outside is called the site, engraved with the name of heavenly stems and earthly branches and twelve months. Most of them are made of wood, ivory or copper, so they can rotate flexibly because they are smooth. According to ancient records, the spoon was thrown on the table to make it rotate. When it stopped, the handle of the spoon pointed south. Sina has been recorded many times. For example, Guiguzi once said that Zheng people must take Sina with them when they go to pick jade, so as not to get lost. There is also a record about Sina in Everything is Ready. For example, Wang Chong's "On Balance" has a relatively obvious record: "Sina shovels the ground, and its shovel guide. Sina is an artificial magnetic conductivity instrument and the oldest guiding device in human history. Wang Chong, a scholar in the Eastern Han Dynasty, said in Lun Heng Yin Shi that Sina is like a spoon, which is used to scoop soup and wine slurry. If you put it in a smooth place for divination, its handle will point to the south. According to Wang Chong's records, Sina was born in the Han Dynasty at the latest. Objects that can freely point to the south must be magnetic and carved by people with natural magnets. It can be seen that artificial magnetic needles have been used in the Han Dynasty. In fact, as early as the Warring States period, Han Feizi recorded that "Wang Li Sina was the first" with the words of east-west direction, but the book Han Feizi did not record the shape of Sina, so it is difficult to judge its right or wrong only by this sentence. There is no doubt, however, that China people invented the magnetic conductivity meter in the Han Dynasty by combining Han Feizi and Lun Heng.

Compass is a tool to indicate the direction. There are two kinds: one is a geomagnetic compass based on the polarity of the earth's magnetic field, but the north-south direction indicated by this compass is different from the real north-south direction, and there is a magnetic declination; The second is the electronic compass, which adopts the magnetic resistance (MR) technology of the magnetic field sensor, which can correct the magnetic declination problem well and has been widely used in GPS positioning equipment. Formerly known as China, one of the "Four Great Inventions of Ancient China", Sina. Widely used in navigation, field exploration and other fields. Directory [hidden] 1 related history 1. 1.2 Discovery of magnetic declination 1.3 Modern compass 2 Reference 3 External link [Edit] Related historical compass was first used for surveying and navigation in Chinese civilization circle, and it is generally believed that it originated in China in the west, without much objection. [Editor] The earliest form of Sina compass is called Sina. In the Eastern Han Dynasty, Wang Chong (AD 27 ~ 97), the principle of "SiNa's shovel, which is thrown to the ground, is guided" in Volume 17 of Lun Heng. He can only say that this is also natural. Although this record is not the earliest, it is the first one to be clearly stated. There should be no objection to using Sina as a direction, but the specific shape is controversial. Early researchers judged that natural magnets were used as matching positions for spoons. Although there are Sina spoon maps unearthed from Han tombs in Nanyang, Henan Province and Eastern Han tombs as evidence, after all, there is no complete supporting excavation. Recently, someone has studied the word "Sina's ladle". It seems that the ladle of "its guide" does not refer to the handle of the ladle.

Sheng restaurant also. -"Shuowen" resin rose

Sit down and drink. -Li Yi has a private car. The wine is clear. -Reflections on the Book of Rites Quli

Choose the good and do the "Spring and Autumn Ram Biography" Xi Gong (from the first year to the thirty-third year) "Who is begging for the alliance? Please put it where it belongs. Where is it? Where is it? Cover it up. " Consider the past and reduce it. -Hong Qing and Ji Liang's "Zhi Ping Pian" means "root" and "root".

Benya -"Erya Shi Yan" is the same.

So was Ben's birth. Everything is done by Han Feizi for the elderly. Although History of Zou Yang Biography cannot deny that Wang Chong has a "magnet as the key to cooperate with the site", what Wang Chong knows about Sina is probably a floating Sina. Because China is the original invention of Sina, Sina has many improved forms, such as reclining, hanging, floating, spire and so on. , first seen in the Song Dynasty Zhu's Nautical Records. Zhou Ping Ketan was written in111year-119 years, but it was about1086 [/kloc-]. This is more than a century earlier than the statement in12007 A. Neckam's On Instruments: "When sailing, the sun is covered by clouds during the day, or when the direction is unknown at night, rub the iron needle with a magnet, and when the needle stops, it refers to the north and south." Almost at the same time as Britain, France and later Italy also recorded the first compass. In addition, the floating Sina can also be used for navigation, because it is not as easy to overflow as some people think. Recently, floating Sina made of Ming dynasty porcelain was found in Qingdao and Hainan, with a size as large as: the maximum outer diameter is 9.5 cm; There are concentric circles containing water, with a hole diameter of 4.4 cm and a hole depth of 2.3 cm. The periphery is marked by blue and white glaze, and the base and walls are thick and solid. I guess it's water collection. Add water when you use it. The basic principle of modern liquid compass is similar, but the sealing technology is improved. zh。 *** /w/index？ Title =% E5% 8F% B8% E5% 8D% 97 & Variant =zh-