How to use the ancient compass

The usage of the ancient compass is as follows:

1. Keep the compass level, close to or parallel to the edge of the measured object.

2. Slide the turntable so that the hairpin head of the magnetic needle coincides with two points on the red line of the compass base.

3. Just locate the reading direction of the layer pressed by the transparent line.

Extended data:

Compass (Feng Shui detection tool, geographical special instrument)

Compass, also known as compass, is a feng shui detection tool and a commonly used operation tool for managing style. The compass is mainly composed of a magnetic needle in the center of a disk and a series of concentric circles, each of which represents the ancient people in China's understanding of a certain level of information in the cosmic system.

The ancients in China believed that man's gas field was controlled by the gas field of the universe, that harmony between man and the universe was auspicious, and disharmony between man and the universe was fierce. So, by experience, they put all levels of information in the universe, such as the stars in the sky, everything represented by the five actions on the earth, heavenly stems and earthly branches and so on. , all on the compass.

Geomantic omen is to find the most suitable position or time for a specific person or thing through the rotation of a magnetic needle. Although the concept of "magnetic field" is not mentioned in geomantic omen, the coordination of the directions, orientations and intervals of each layer on the compass implies the law of "magnetic field".

Development history:

The predecessor of the compass is called "Sina", and the earliest record can be found in "You did everything wrong" in the third century BC. At that time, when people talked about the phenomenon that magnets attract iron, they thought it meant "motherly belt", so they once wrote "magnetism" as "kindness".

Sina is like a household spoon with a hemispherical bottom. In order to reduce friction, it is easy to turn when placed on a plate with "stem and branch" scales. Some people say that it is still too early to use the compass, because according to the records of Yue in the Southern Dynasties, the "guiding boat" appeared in the Jin Dynasty.

According to the Japanese, in the fourth year of Qi Ming (the third year of Tang Gaozong in 658 AD), Birov led 180 ships to sail. In the same book, in the sixth year of Emperor Tianzhi (Tang Gaozong was blocked for two years, AD 667), he made an independent instrument compass (a device that uses a compass to indicate the direction of magnetic meridian is called a compass), which is widely used in navigation.

Western books introducing compasses first appeared in the early 3rd century/KLOC-0, which was later than the time recorded in Zhou Ping Carving Tan and other books 100. The deviation between water floating needle and magnetic needle was recorded in Meng Qian Bi Tan written by Shen Kuo in Song Dynasty. Columbus discovered the deflection angle of the magnetic needle when crossing the Atlantic for the first time, which was more than 400 years later than that recorded by Shen Kuo.

The liquid magnetic compass is widely used in ships in modern countries, which is an important creation of navigation technology. This design is based on the traditional dry compass in Europe, absorbing the floating needle technology in China for 800 years, making the magnetic compass more and more perfect. This is an important achievement of scientific and technological exchanges between China and the West.

Baidu encyclopedia-compass