Ancient Chinese sundial (Sundial Instrument), which consists of slender dial (Guyana) and 1 or 2 pole (Table) constitute, for one year and 24 solar terms used to measure the length of time
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No. 2
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Measuring instruments shade. Guyana is supine the foot, the table is a vertical benchmark. Table on Guyana's south, north, and Kyu-vertical. "Sung Chi Li in nine": "yin and yang of the body concept of heaven and earth to orthotopic the defense, regular examination Run, MO close to the ancient Chinese sundial." Ming Zhang Huangyan "recommended by the township and then the right to know the severity of justice, then know the length of degree ":" is a protracted reduction of their win, Sri ancient Chinese sundial repair and count forever. "
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No. 3
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Analogy model, set an example. Tang Pei Tingyu, "Professor Sun Chu Bin Jiedushi system state": "Der sword; high Xie dust; sealing Akiyama, ranking as the ancient Chinese sundial."
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No. 4
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Analogy to the legal degree, standard. Tang Cui Gu, "Professor Xiao Ye LI Xuan monitor the censor system": "Censor House residence among the court, distinguished his Department, covered with ancient Chinese sundial 100 Officials, correct string quartet."
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No. 5
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China's ancient astronomical instruments, stood in a foot stone pedestal level (Guyana), North and South ends of the legislature of a benchmark (Table). Can be determined according to the length of shade solar terms and the length of a year.
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No. 6
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Sundial is the length of the shadow of an ancient measure of astronomical instruments, the "Gui" and "table" of two parts. Long time ago, it was found houses, trees and other objects in the sunlight will cast a shadow, the shadow of a certain law changes. So they erect a pole in the ground or on stone pillars to observe the shadow of the variations on a pole or pillar legislation is called the "table"; the table with a ruler measuring the length and direction of the film, you can know the hour. Later, find the table at noon shadow is always to invest in north direction, put a ruler made of slate tile on the ground, and _set_ the table perpendicular to the ruler of an attached table base, the other end of the stretch north direction, This made the ruler with the stone called "Guyana." Noon shadow cast in stone on the table, the ancients can be read directly affect the length of the value of the table. After a long observation, the ancients learned not only the shortest day at noon shadow table, and come within a year the summer solstice at noon, the sun is shining, the shortest shadow table; winter solstice, the noon sun will shine oblique, the table is the longest shadow. Thus, the ancients to the table at noon shadow length to determine the solar term and one year in length. For example, twice the maximum measured value of shadow table, the value of the two longest number of days apart, that is, the length of time a year, no wonder that our ancients knew more than 365 days a year is equal to the value. Henan Dengfeng Observatory in the existing 40-foot 128-foot high platform and the amount of days is a huge sundial foot.
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No. 7
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Sundial is the length of the shadow of an ancient measure of astronomical instruments, the "Gui" and "table" of two parts. Measured shadow standing on a flat benchmark and stone pillars, called the table; north south direction the length of flat affect the determination of the rigid form, called Guyana. Long time ago, it was found houses, trees and other objects in the sunlight will cast a shadow, the shadow of a certain law changes. So they erect a pole in the ground or on stone pillars to observe the shadow of the variations on a pole or pillar legislation is called the "table"; the table with a ruler measuring the length and direction of the film, you can know the hour. Later, find the table at noon shadow is always to invest in north direction, put a ruler made of slate tile on the ground, and _set_ the table perpendicular to the ruler of an attached table base, the other end of the stretch north direction, This made the ruler with the stone called "Guyana." Noon shadow cast in stone on the table, the ancients can be read directly affect the length of the value of the table. After a long observation, the ancients learned not only the shortest day at noon shadow table, and come within a year the summer solstice at noon, the sun is shining, the shortest shadow table; winter solstice, the noon sun will shine oblique, the table is the longest shadow. Thus, the ancients to the table at noon shadow length to determine the solar term and one year in length. For example, twice the maximum measured value of shadow table, the value of the two longest number of days apart, that is, the length of time a year, no wonder that our ancients knew more than 365 days a year is equal to the value. Henan Dengfeng Observatory in the existing 40-foot 128-foot high platform and the amount of days is a huge sundial foot. Yizheng copper sundial China's earliest extant sundial. Stone 1965, Yizheng, Jiangsu Eastern Han Dynasty unearthed in the village 1. Sundial is an instrument of ancient astronomical observations. In different seasons, the sun come and go in different directions and the height of noon, and the variation of a cycle. Kyu level will be placed on the table open-air north of the table under the shadow Guyana, measurement, comparison and calibration shadow of Sunday, the annual change, you can _set_ the direction of Time, find the anniversary of the constant, by season and the development calendar. So sundial shadow test is a major observational astronomy in ancient China one of the means. Yizheng copper sundial 34.5 cm, the Han system of 1.5 feet, engraved with the edge size of units; Table 19.2 cm high, the Han system of 8 inches. Paraguay, with the pivot connection between the table and make into one. Will be erected using the table with the Guyana vertical; normal table can be folded into the body to stay out of Guyana within the gap, easy to carry. According to the traditional view, the table is 8 feet high; this value has been long in use. The table the table is 8 feet high just 1 / 10, indicates that it is a portable video test equipment, can prove a permanent observatory at the table with 8-foot observation statement is reliable. Gui and table sundial by the two parts: Guyana is the scale of the feet are flat on the table is upright benchmark, and placed the two ends of Guyana and Guyana vertical. When the sun is shining table, Guyana's shadow appears on the table, under the direction and length of the shadows and to be read time. Spring and Autumn Period sundial measurement has been used twice in a row between the shadow experienced the longest and the shortest time, and calculate the length of tropical year. Sundial mostly copper. 1965 in the middle of Jiangsu Yizheng Eastern Han tombs unearthed a pocket-sized bronze sundial, which consists of 19.2 cm and 34.39 cm long table in the Guyana constitution, sundial is connected between the pivot can be table level put in the box, the sundial combined installed one, Kai together freely, easy to carry, is the designer and the foundry division closely with the masterpiece. Sundial time measurement precision is proportional to the length of the table. Distinguished astronomer Guo Shou Jing Yuan beta in the week when the local design and the construction of a measure Tower. It consists of a 9.46-meter high tower, and from the station north of the north wall of the groove in the tile composition of the long building, the high-equivalent solid sheet, tile floor in Taipei "quantity-day ruler," the stone Guyana. The huge "sundial" greatly improve the measurement accuracy. When measured by sundial has been extended to the Ming and Qing, the Nanjing Purple Mountain Observatory is now a sundial, is the orthodox Ming period (1437-1442 years) created it. Ancient times, people, sunrise, sun_set_ and interest rates, regularly each day from the sun goes down Dongsheng, intuitively felt the sun with time, began to place the sun in the sky to determine the time. But this hardly accurate. According to records, three thousand years ago, the West Zhou Chengxiang Dengfeng County in Henan Zhougongdan _set_ off a kind of shadow length to determine the time of measurement instruments, known as the sundial. This is when the world's first timer.
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Encyclopedia of Astronomy
圭表 天文百科
圭表 天文百科
Sundial is a tradition of the most ancient astronomical instruments, the feet are flat north-south direction is called Paraguay, is called a vertical column table. According to the shadow at noon, the length of the table determine the number of days of a tropical year and twenty-four solar terms and so on. Sundial as early as three thousand years ago had been created by the working people with a specific age of the birth has been difficult to trace. Ancient times, people, sunrise, sun_set_ and interest rates, regularly each day from the sun goes down Dongsheng, intuitively felt the sun with time, began to place the sun in the sky to determine the time. But this hardly accurate. According to records, three thousand years ago, the West Zhou Chengxiang Dengfeng County in Henan Zhougongdan _set_ off a kind of shadow length to determine the time of measurement instruments, known as the sundial. This is when the world's first timer. Gui and table sundial by the two parts: Guyana is a north-south direction is horizontal ruler, the benchmark table is upright, placed the two ends of Guyana and Guyana and the vertical. When the sun is shining table, Guyana's shadow appears on the table, under the direction and length of the shadows and to be read time. Spring and Autumn Period sundial measurement has been used twice in a row between the shadow experienced the longest and the shortest time, and calculate the length of tropical year. According to the winter solstice, the longest shadow at noon table, summer solstice, the shortest shadow at noon on the table, to determine the annual winter solstice and summer solstice, and thus calculate the length of a tropical year. To improve accuracy, and can be determined at the date of the winter solstice with a history of a winter date as early as possible compared to the number of days apart during this period divided by the number of years experience, which can be quite accurate tropical year length value. After the Han dynasty sundial, the table is usually taken to be 8 feet high. Dengfeng GuoShouJing measured Tower built, using a 40-foot 128-foot high platform and the amount of days of foot, it is in fact a giant sundial. Ming will return to 8-foot high table, Guyana more than ten feet long, compared with 1. Astronomical clear the top of the next tab with a length, so that the table up to 10 feet, when the shadow will fall in the winter table outside Guyana. Thus, the other end of the Qing Dynasty in Guyana has established a high 3-foot 5-inch "small form", the equivalent of an extension of Guyana, said Li Gui, shadow would fall on the winter table _set_ Guyana on. Sundial time measurement precision is proportional to the length of the table. Distinguished astronomer Guo Shou Jing Yuan beta in the week when the local design and the construction of a measure Tower. It consists of a 9.46-meter high tower, and from the station north of the north wall of the groove in the tile composition of the long building, the high-equivalent solid sheet, tile floor in Taipei "quantity-day ruler," the stone Guyana. The huge "sundial" greatly improve the measurement accuracy. When measured using the sundial has been extended to the Ming and Qing, the Nanjing Purple Mountain Observatory is now a sundial, is the orthodox Ming period (1437-1442 years) created it.
