Widely used in a variety of directional judgments, such as navigation, wilderness exploration, urban roads, map reading and other fields, the compass can be divided into two types of relying on magnetic force and not relying on magnetic force.
Since ancient times, the compass has been our indispensable tool, so everyone must be familiar with it, but who knows what uses the compass has? Xiaobian will introduce it to you today.
The compass, also known as the compass in ancient times, consists mainly of an axis-mounted magnetic needle that rotates freely under the influence of the Earth’s natural magnetic field and remains tangent to the magnetic meridian, the South Pole of the needle points to the geographic south pole (North Pole of the magnetic field) , which can be used to determine direction.
Commonly used in navigation, geodesy, travel and military aspects, the invention of the compass that physically indicates the direction has three types of components, namely Sinan, compass and magnetic needle, all of which belong to Chinese inventions, according to the “Ancient Mine Record”, it first appeared in the area of Magnetic Mountain during the Warring States period.
The compass is the result of the working people’s long-term understanding of the magnetism of magnets in ancient China. As one of the four great inventions in ancient China, its invention has played an invaluable role in the development of human science, technology and civilization; In ancient China, the compass was first used to determine the position during sacrifice, etiquette, military and divination and feng shui.
The application of the compass in navigation greatly promoted the great geographical discovery and maritime trade. The ancient Chinese used the compass in military and navigation activities, as well as in geomancy. Later, it was introduced into Europe and played an irreplaceable role in the great geographical discovery and navigation activities in Europe; The compass is also the single most important invention of navigation technology.
Later, modern people made various electronic compasses. Smartphones generally have this software. The electronic compass, also known as the digital compass, is a method of determining the North Pole b
While GPS navigation, positioning, speed measuring and orientation has been widely used, but due to its signal is often terrain, terrain shade, results in the decrease of accuracy greatly, can’t even use; Especially in high-rise urban areas and densely vegetated forest areas, the effectiveness of GPS signals is only 60%, and GPS cannot give heading information when stationary.