Used to indicate the direction of the compass. Compass and a guide to the two inventions, the compass structure is relatively simple, flexible mainly by a rotating magnetic pointer and a position of Dial composition, indicators point to the South forever, and guide to the key position is the compass, but otherwise a complex The gear drive system, small car, Xiao Mu people will never point to the south. Invented the compass and guide to the key, found longitudinal between heaven and earth is the kind of singular and invisible magnetic and magnetic line. This extremely weak magnetic force, but enough for the minimum quality, they can turn the magnet or magnetic metal pointer in Mobile, and indicators at any time, always pointing to the south. Although people can not correctly explain the source of the magnetic force, I do not know the Earth's magnetic pole and the north and south magnetic pole, but they are extremely intelligent use of this discovery, invented the compass.
Ma Jun, the three countries created a guide to car (model). It uses gear transmission system and Clutch installation instructions direction, under certain conditions, to the car, Muren arm remained Guide.
Water float compass (model). A magnetic fish-Ciwan on the surface, Still, the fish were indicative of both North and South.
Palygorskite hanging of the compass (model). Silk alone will root paste wax with the central part of the needle, The needle down in the center position was at the top, still, at both ends of its north-south direction, respectively.
The first legend is that the common ancestor of the Chinese nation one of the Shennong Shi and another powerful tribal leader Chiyou operations, encountered heavy fog, thus大败. Shennong Shi to the more powerful and more prestigious seek help from the Yellow Emperor, Huangdi created a guide to car gave Shennong Shi, let him in the fog also can tell the direction, then defeated the Chiyou. Another legend is that before 3000, Zhou Wuwang cutting Wang Yan Zhou, the establishment of Zhou Dynasty, HE States to assist the Duke of Zhou Wang rule Shangji from Vietnam in the Sang's Guide to a car, so that they can identify the direction, Smooth return home. These beautiful legends no precise historical research, the real history can never be verified in that volatile around the Three Kingdoms period, the inventor Ma Jun re-create the long-lost to the guidelines, but the guide to the practice of records also unknown. Until the Northern Song period, the scientist Shen Kuo (1031-1095) was in his encyclopedic masterpiece of science, "Meng Xi Bi Tan" in the compass of several types of movement carried out a detailed description of: water float, palygorskite hanging, nail Law And the bowl lip law. China is the earliest use of the compass of the national guidelines Sea, the compass of the invention and spread of the West, the Hang Haiye had a great impact, is considered China's enormous contributions to mankind. Back in the early 12th century AD, the Northern Song Dynasty government had sent a huge fleet mission to North Korea, the records of the mission after the "sun and the Fengshi Korea plans," said the fleet sailing, night "before God Xingdoushan step, if Hui Ming, Guidelines used floating needle. " The use of the compass, made up solely rely on observation of celestial phenomena navigation deficiencies, opened a new era of all-weather navigation. Compass spread through the Silk Road in the Arab and later spread into Europe. European use of the compass navigation around the beginning of the 12th century.
The use of the compass for the development of the cause of the Sea. Map "Tianfei the" Juanshou the Ming Dynasty Zheng He map.
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