compass is used to determine position
a simple instrument. Compass, formerly known as one of the four great inventions of ancient China Ian. Is a major component installed in the shaft of the needle free to rotate. Needle in the ground magnetic field can be maintained at the direction of the magnetic meridian tangent. Needle points to the geographical North Pole North Pole, the direction can be identified by this performance. Commonly used in navigation, geodesy, travel and military affairs. Of the same name there band name and film name.
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compass directions outlined in the tangential direction of the magnetic meridian principles of the founder of the compass compass compass style story of the application of the magnetic properties of the history of electronic compass compass compass Why is it called the most primitive compass Meng Xi Bi Tan original translation text summarizes the movie starring introduced Scenes Synopsis compass band lineup the band name of the band the band thought the development achievements of the band profile site site navigation compass compass Post Bar album aim of making
The invention of the compass compass outlined Labor people, the practice of long-term understanding of the results of magnetic objects. As production of labor, people contact with the magnetite, as he began to understand the magnetic properties. People first discovered the magnetic properties of iron introduced. Later it was found a directional magnet. After many experiments and research, and finally invented the compass can be useful. Tangential magnetic meridian Magnetic Meridian Introduction of a point on the surface of the earth horizontal component of the geomagnetic cut lines circle the earth. Affected only by the magnetic needle in (not from the poor) in the case of the point to the direction of the magnetic meridian (that is, in the Earth's magnetic field, the needle resting in the freedom of a point under the direction of its axis.) Asymmetry and the magnetic field due to magnetic poles are not regular, the magnetic meridian through the magnetic poles are generally not. Therefore, referring to the magnetic north needle is not necessarily the direction of magnetic north. Radial direction of the magnetic compass can be determined. Magnetic meridian plane through the center of the earth and the needle stationary north-south direction indicated by the vertical plane.
magnetic meridian tangent
direction of the principles of the Earth is a big magnet, the magnetic south pole near the geographic North Pole, near the magnetic North Pole in the geographic South Pole. Compass in the earth's magnetic field by the magnetic force effect, so we will be one end of the guide refers to the North end. Introduced to Europe was removed after the discovery of the navigation play an irreplaceable role. However, historians of science know, the first answer Then, after the Chinese invented the compass, compass theory for what kind of? Gilbert's theory is spread to China in time? The late Ming and early Qing dynasties, Shanghai Jiaotong University,
shape up skechers, Department of History and Philosophy of Science, Professor Zeng Jian Guan started since 2003 is basically a blank on these issues. method of artificial magnetic compass, the discovery of magnetic declination and the compass of the erection method, but on the compass guide but why not have a clue - theory, combined with the shape of the earth when people know, put forward various compass theory. For example, the latest book in the Song Dynasty as the Son of the water is gold. iron produced in the magnet, the magnets are produced by breeding and yang, and yang is a fire, in the south, so the needle is equivalent to the mother of the South. Thus, the needle will visit both the mother and children have to nostalgia naturally we should point to the north-south direction. practices. Prosperity of the ancient theory of yin and yang, yin-yang theory interpretation of the compass with the Guide and Particular, the theory that different sections have different magnetic properties, they decided to needle the point, this argument is easy to inspire people to find the magnet poles, and further to associate with the needle pointing to magnetic pole between, so as to correctly understand the problem to find possible ways. Song's compass theory, still think that the , so that the surface must have a center,
skechers outlet, to which the meridian through the center is the only north-south direction. Southern people have three different and so that, once the measure is not in the north-south line, the compass points to the natural To the Ming Dynasty, someone who works off Tuonan Tang pointed out that the guide pin from the ground position is decided by the system, while the azimuth angle from celestial bodies is determined by the system. Build off that this statement Ming Dynasty (AD 1573 ~ 1620), missionary to China, bringing the West compass theory, theory of the Earth and related knowledge. Under its influence, Chinese scholars began to explore the compass from a new theoretical perspective, in the process, continue to play down the role of yin and yang, the analysis of the mechanical angle increasing, but Gilbert in 1600, even the Western scientific theories put forward by scholars no uniform , not to mention the White East soil. Missionaries, arrived in China in 1658 the Belgian Jesuit missionary Ferdinand Verbiest compass theory of the system, but he decided that the needle points to the geographical north and south poles of Earth itself, the theory is still limited to the scope of ancient science, unlike Gill Gilbert recognized that the earth itself, there is a magnet. Verbiest influential theory in China until the mid-19th century, China still scholars use it to explain the compass problem. By this time, late Qing Dynasty missionaries have started to introduce modern Western knowledge to China Magnetic was. Ancestor of the compass that the current conventional wisdom about the compass of the Patriarchs in the Warring States period. It is made with natural magnet. Looks like a spoon, round, smooth and can be placed on the When it is stationary when the spoon handle will point to the south. At that time the book, 'Note says:' day and night, to listen to what North Korea is also Mozambique. 'instruments of various shapes, and therefore can only hardness 5.5 to 6.5 degrees degrees natural magnet made of Sinan. Eastern Han Dynasty's Wang in his book After a single piece of lodestone is refined into dipper, spoon handle guide pole, and to just fall to the center of the spoon spoon at the end of the middle of the spoon placed on the site into a smooth, site foreign inner circle, surrounded by engraved Lunar four-dimensional, synthetic twenty-four-way. This design is carefully observing a lot of ancients on the magnetic phenomena of nature, has accumulated a large amount of knowledge and experience, after a long-term research was completed. Ian's emergence is that people refer to the polarity of the magnet understanding of the practical application. But Ian has many flaws, the natural magnet is not easy to find, in the processing susceptible to attack by heat loss of field. So Ian magnetic weak, and it is with the site contact points to be very smooth, otherwise they will be rotating friction resistance is too large, and difficult to rotate, the guide can not achieve the desired results. and Ian have a certain size and weight, very easy to carry, this may be the long-term is not widely used Ian's the main reason. The current model is a famous Ian According to historian Wang Duo Technology under the surface, rest, spoon the end point for the South. but Ian is a view of magnetic guidance tool has been questioned by academia. First, in while the magnet to magnet polarity was found that the law does not meet the knowledge, the other must be processed into magnets guide the magnetic spoon, there must be conscious 'along its north and south pole to the' hard steel mill. in the eleventh century before the invention of the compass ancient literature, there has never been a magnet poles, and it refers to the polarity of the accounts. 50's money Linzhao Guo academician of care who have been trying to spoon-shaped lodestone for making a guideline, but the magnetic lodestone from the small, bottom friction large without success. and Mr. Wang Zhenduo the recovery of tungsten steel material is magnetized in the artificial electromagnetic field, which can not be done in two thousand years ago. Now Museum of Chinese History in Beijing are no longer on display Sinan model. Northeast Normal Professor Liu Bingzheng of Sinan in 1956 to challenge the magnetic spoon that [2], 80 years later means the polarity of the magnet by using a natural experiment and test it was noted that , and other literature Ian or guide vehicles such as Ian is a magnet on the scoop, Hangzhou University Professor Wang Jinguang Ian made a magnetic spoon into the mercury pool (residue of the previous collection the Peking Museum Song [7]. However, these concerns have not been the history of science scholars generally accepted [8] [9]. According to the latest literature research indicated that Ian is the Big Dipper is another name, while Ian's other uses are also with the Big Dipper on [1]. Atsuko article by Wei L Lun Heng, Ian good luck grip handle, Ectocarpus apparatus in Chen Tao. for the given time (Du Fu's * Dai Shulun The Ian is the magnetic Guide tools. actually cited history, a small boat floating in the water after magnetization, will be able to guide the North. then use this as a game. Northern Song Dynasty, was the public light in the Iron leaf cut, two inches long, five wide, sharp like a fish head and tail type, set in the burning of charcoal, Hou through red, to iron out the fire first fish, seal seal to the end of being pair bit, dip the pot, no ending points are only to receive the secret devices. Available, set the water bowl at the flat with no wind, the fish in the water, so floating, often to the afternoon of its first also. will become the collapse of magnetic domains along the magnet, dampened with water quenching and the formation of magnetic domains, but in the magnetic domains under magnetic field arranged in a direction, it can guide the North. because of the Yangtze and Yellow River region, about 50 degrees geomagnetic about angle, such as horizontal,
shape up shoes, only the horizontal component of work, but at an angle into the water makes the fish an effective magnetic field strength increases, the magnetization is better [2]. the invention of artificial magnetic method of the compass application and development played a huge role. magnetism and geomagnetism in the history of the development is a major event. Shen Kuo in the Northern Song Dynasty, Feng, is able to guide. arrangement tends to a certain direction, so that the magnetic needle shows the method. This method than the magnetic method is simple, and the magnetic effect of the geomagnetic method better than the friction law is not only the world's earliest inventions, but also of practical value for the magnetic point The emergence of devices to create the conditions. , not deep ear exam. Bu Tong, the magnetization after the point is different. But Shen Kuo did not know this truth, his real record of this phenomenon and frankly admitted he did not do in-depth thinking. in the hope to further explore Houren. On the method of needle device, Shen Kuo describes four methods: 1. Water float - a few rushes through the needle floating on the surface to be the direction. Modern various compass instruments (10 sheets) 2. bowl lip spin titration - will be put in the needle sized edge, the needle can be rotated to indicate direction. 3. fingernail spin titration - the needle resting on top of the nail is smooth fingernails, the needle can rotate freely, the direction. 4. strand hanging method - painted in the middle of some of the needle wax, a sticky silk, hanging in a place without wind, can indicate a direction. Shen Kuo also made a comparison of four methods, he pointed out that the biggest drawback of the water float, shake the water easily affect the measurement results. bowl lip rotation spin titration titration and nails, due to friction is small, rotating very flexible, but easy to fall. Shen Kuo is the thread hanging thrust-weight comparison method, he thinks this is a more ideal and practical way. In fact Shen Kuo pointed out that the four methods Compass plant has summarized the two systems so far - water and dry needle acupuncture. Song Yuan Chen Liang in a needle into the fish mouth, to become a guide to fish. to float on water, the head guide, this is a class of water injection.'s Guide turtle was a popular new device will be a natural magnet placed in the wood turtle abdomen, lower abdomen in the wood turtle dig a hole in a smooth, aligned and placed in an upright at the top of board nailed sharp bamboo slip, so wood turtle was placed in a fixed, free to rotate the fulcrum on the. As the fulcrum at the friction is very small, wood turtles are free to turn the guide. when it is not used for navigation points, and for the illusion. But there was a drought that is the precursor of the compass.'s Guide to the invention no later turtles in 1325. wood carved turtle type, turtles with magnets embedded in the abdomen center, wood turtle-like Li Zhu placed in the tip, the rest end to end points guide the North. compass orientation
In addition to the compass to determine direction of , but also need to have orientation matched drive. the first time using the compass, may not have a fixed position plate, with the need for measuring position, there has been one of the needle and the compass bearing plate. compass has geomancy compass plate with a compass and water, dry compass. azimuth disk is still twenty-four-way, but the disc has evolved from the square into a circle. As a long look at the needle position on the disc in position, we can determine the direction to. Southern Song Dynasty, has three differences in the needle (north and south pole magnetic field to determine the direction of the needle), as well as the meridian between the stitches Wang C (with the shadow of the sun to determine the direction of the geographic poles) the angle between the two directions is the magnetic declination. disk surrounding the second moment fourth position, in the water containers, needle across the Deng Cao, floating on the water. Now people know, the Earth's two magnetic and geographic north and south pole is close, do not coincide. needle points to the Earth's magnetic pole, not geography poles, so that means the needle is not due south, a slight deviation north direction, this angle is called magnetic declination. and because spherical earth, so when the magnetic needle will point downward, and horizontal direction of a clip angle, this angle is called magnetic inclination. different locations, magnetic declination and inclination are not the same. a book in the Northern Song Dynasty, Shen Kuo in the The. magnets can attract iron, often referred to as magnet. very close to the earth is the N pole Antarctic. People know that same-###### poles repel, opposite poles attract phase, so no matter where in the Earth's surface, get a free rotation of the needle, it always points to the north pole N , S pole always points south. two thousand years ago, that is, the Warring States, China has used to make tools out of iron. working people when looking for iron ore, found the magnet,
skechers tone ups, and know that it can iron absorption. China ancient books legend, Qin Shi Huang unified China after the Xianyang in Shaanxi made a lot of Metrical, Metrical door has a magnet, the magnet caused entirely. If anyone want to assassinate with iron, as long as through there, magnetic door This person will suck. Also, according to ancient books, the Han Dynasty, when there Jiaodong Luan large, dedicated to the Emperor one kind of fighting chess. this one into pieces on the board, it will strike against each other, automatic fight together. Emperor looked very surprised. originally come to a big piece is a magnet do, so there are magnetic, to strike against each other attractive, but Han did not understand the truth nothing more. into the Western Han Dynasty, a man named Luan great alchemist, he used a magnet of this nature do things like two pieces, by adjusting the polarity of the mutual position of two pieces, sometimes two pieces attract each other, and sometimes mutually exclusive. Luan big called . He dedicated this novel stuff Emperor, and on the spot demonstrations. marveled Emperor, Dragon Heart big Yue, Feng Luan much actually deceived the Emperor stuff. the application of the magnetic compass upon the nature of the invention will soon be applied to the military, production, daily life, topography, etc., particularly sailing. compass in navigation on the application there is a gradual process of development. a book slightly later than the age, the called magnetic phenomena on the process of observation and research to better understand the magnetic properties, and attempt to apply more of these properties. Fanggong legends Emperor built, the palace is a magnet manufacturer. If the assassin with a sword over, will immediately be sucked, was captured guards on the spot. This story has a lot of, The enemy armored vehicles passed by, it was firmly suck, not stirred. Malone's soldiers wear Xijia, magnets have little effect, be free to act. enemy that magic, without a fight. Eastern Han Dynasty, the the nature of the people of the magnet has a lot of understanding. Even when the poet Cao Zhi poem also used in the correction of the iron needles, so a few hanging in the magnetic needle on the end to end. Magnetic stronger magnet, attracting more than a dozen root iron needles, even suck one jin knife. Hongjing not only the strength of the magnetic points, and that the measurement method. This may be the world's first recorded on magnetic measurements. the nature of our ancestors on the magnet is the compass of research and understanding of the invention and development. compass at home in ancient geomancy are mainly used for house-phase phase tomb,
skechers shape up shoes, and has been used for navigation and others. It is this progress of human society which played a huge role, and thus was able to compass among the ranks of the four great inventions in ancient times. of books recorded the compass for navigation, Zhu began in the Song Dynasty 1119 book, Electronic compass compass is an important navigation tool, even in the GPS will be used. electronic compass will replace the old compass or compass needle compass, electronic compass for all solid state components, you can also easily interfaces with other electronic systems . electronic compass system of the magnetic field sensor magnetoresistive (MR) technology is the best solution, and now used in many electronic flux gate compass sensor is also compared, MR technology does not need the coil and the IC manufacturing process can be used (IC -like process) production, is a more worthy use solution. As MR has high sensitivity, it is even more than the application of the Hall element better. Electronic Compass (1) the history of the compass compass compass, also called , invented in ancient China made use of a magnet refers to a guide instrument polarity. Therefore, introducing Sinan must start with a magnet. magnet is usually referred to as attract the mother of his children, so people call it Earth's north and south ends have different magnetic poles, the Earth's magnetic North Pole is negative, the positive pole Pole. According to the phase exclusion of same-###### pole, opposite poles attract the principle of phase, take a magnetic needle free to rotate, on both the Earth where, it always refers to the North the positive and negative always guide. the most primitive compass as early as the Warring States Period more than two thousand years ago, people use the characteristics of magnetic north-south direction into the guide tool ─ ─ Ian. However, the Warring States Period The Ian is what can not be verified. into. site is made of bronze, foreign inner circle, the center is worn smooth and round face, to ensure the accuracy of the direction of the spoon body. center circle of the outer cloth turn out gossip, Heavenly Stems, Earthly Branches and Ershibasu, a total of twenty four directions. the site is to use the center piece teaspoon ground natural magnet, the magnets of positive ground to Ian's long-handled, spoon hemispherical head and the bottom is very smooth. using flat when the site first, and then Ian on the middle of the site, hand-struck spoon handle, make it turn, stop and wait for Ian, spoon handle in the direction is south. This spoon when Ian was still applied until the eighth century. to the Song Dynasty, the working people mastered manufacture of artificial magnet technology, but also created a guide to fish. guide the fish is to cut thin steel fish-shaped, two inches long, five wide, concave part of the fish's belly, so that the same fish as the boat can float on water. along the radial direction and then heated and quenched so magnetized by the geomagnetic field (see the Guide to the fish section). This method of artificial mass flux guide made of fish, much more convenient than the use of Sinan, as long as there is a bowl of water, to guide the fish on the water will be able to distinguish directions. After a long period to improve, and people again in a natural magnet needle friction, also have the magnetic needle. This man passed through the magnetic needle compass can be said that the formal. Shen Kuo in his The where it floats on the surface, the direction. In static needle to indicate North and South. is to smooth Wanbian placed on the needle, turning the magnetic even, as it happened guide and nail the role of law. Shen Kuo by precise observation of experiments, also found that needle in the direction is not south of the north, but west and minimal deviation Southeast, this discovery in science is called magnetic declination. Why is it called a compass as early as the Warring States Period, In the Eastern Han Wang on the. written by Song Zhu, , Southern Fujian Road, City of Maritime Affairs (then the government authorities of foreign trade management) lifting Zhaoru fitness in the book, poor, increasingly, Department of Yan. applications, so 15th century -16 century Europeans have the world's geographical discovery. All this, according to the official Chinese history textbooks of view, as the history and relationship, the Europeans should be the compass is to a look at Encyclopedia Britannica and the Chinese entry in the compass, they find it far from p> The first entry for the Ian '... ... mechanical equipment for the Guide Guide to car, around the 3rd century invention ... ... or investigation when used on the earth's basic finding equipment, ... ... the oldest, the most commonly used for the magnetic compass compass, ... ... the 12th century, apparently in China and Europe have their own navigators found a piece of lodestone, a naturally occurring magnetic ore, when floated in the water stick always points the direction of the North Star ... ... should be produced using only the compass in China), the other is used for navigation and surveying, and more professional equipment refers to the North, Europe and China simultaneously, without priority.'s that came out differences, compare these two entries, that seem to Encyclopedia Britannica, and colonize other decisive events of modern history in the same operation with the artillery and navigation play a role contributed. of Encyclopedia, there are also a compass and a compass (magnetic compass) two entries, but both for the interpretation of the compass, or the interpretation of the compass, are ultimately traced to the Warring States Period, is homologous relationship, and no distinction as the European concept is so entirely different. Therefore,
skechers shape ups, the Kangxi and Peyrefitte to say there will be some answers to their ridicule - obviously, Kangxi agree compass and compass from the same source used to
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Linear Mode
