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Ruian Shunfeng Navigation Instruments Co.,Ltd

Add: No.20, Heping Road, Jinhu Street, Ruian, Zhejiang, China
Con: april Zhang
Tel: +86-577-65520898
Fax: +86-577-65966926
Mob: +8618158321811

The Principle And Characteristics Of Magnetic Compass

Magnetic compass is the use of magnetic needle in the geomagnetic force can point to the Earth's magnetic north (south) pole made of a principle pointing to the instrument. Magnetic compass has been used as an important navigation instrument in the installation and use of marine ships has a very long history. At present, the modern ship has been equipped with gyroscope (electric instrument), Wei guide (GPS) and other advanced navigation equipment, but because of the modern magnetic compass with a simple structure, reliable performance and do not rely on external conditions, Navigation equipment and was used by marine ships. International Maritime Organization (IMO), classification societies, national ship inspection agencies are clearly stipulated that: marine ships should be equipped with magnetic compass, and should be properly corrected self and the self-difference table.

    1 magnetic compass classification

A by Luo Luo through the Luo basin whether there is liquid, there are liquid compass and dry Luo by two types. The compass of the liquid compass is suspended in the basin filled with liquid, and the stability of the compass is better when the ship is rocking due to the damping effect of the liquid. In addition, due to the buoyancy of the liquid, can reduce the compass support shaft pin and the friction between the bearings, thus improving the sensitivity of the basin. The company's products are liquid compass.

B by the use of magnetic compass points, there are standard compass, steering compass. Standard compass is generally vertical, installed in the cab deck (Broken deck) on. Because of its high position, no shelter, affected by the small impact of the ship, was used to observe the heading and measurement of the object orientation and correction of the steering compass, it is called the standard compass.

Steering compass is typically a desktop, mounted in a cab for observation of course and steering. The company produces various models of standard compass and steering compass.

C by compass disk diameter points, commonly used 190mm, 165mm, 130mm, 100mm.

    2 magnetic compass after the difference and correction

Steel ship by the magnetic field of magnetization will produce ship magnet, which will affect the magnetic compass pointing accuracy, the so-called "self-difference." This self is poor and can be corrected by the teacher. The company's magnetic compass is equipped with a high efficiency self-difference correction device.

    3 magnetic compass installation

A magnetic compass is installed on the longitudinal line of the ship as far as possible and the first line of the compass should coincide (or be parallel) to the longitudinal line of the ship.

B The minimum distance between the standard magnetic compass and any ferromagnetic material is 1 m.

4 daily maintenance of magnetic compass

A usually magnetic compass should be covered with a horse through the cap (standard compass should be covered with Luo sets).

B to keep the liquid inside the basin colorless and transparent, to eliminate bubbles.

C to keep the paw axis, often flat ring lubrication, flexible rotation.

D regularly check the compass of the half cycle, the sensitivity, if necessary, on the Luo basin for rehydration.

There shall be no magnetic objects placed near the compass, and the compass should not be kept in a high temperature and vibrating environment for a long time.

The principle and characteristics of magnetic compass

CPT-130A, CPT-130B, CPT-130D desktop magnetic compass

CPT-165A desktop magnetic compass

CPT-190 desktop magnetic compass

CGF-180 Reflective Magnetic Compass

CGT-165 projection magnetic compass

CPL-165, CPL-190 vertical magnetic compass

CX-65, CX-65A boat magnetic compass

Ruian shunfeng navigation instruments co.,ltd


Con：april Zhang