Position detection device to determine a moving distance of a moving body

A method for detecting a position of a moving body moving on a movement path on which magnets with south poles and magnets with north poles are alternately disposed, the method comprising:

• detecting, by a first position detector disposed in the moving body, the position of the moving body by detecting poles of the magnets;
• detecting, by a second position detector disposed in the moving body and disposed in a different position from a position of the first position detector in a moving direction of the moving body, the position of the moving body;
• and
• determining, by a controller, the position of the moving body on a basis of a position detected by the second position detector when the first position detector is located in an irregular section in which the poles of the magnets are not disposed regularly,
• wherein when the first position detector is located in the irregular section, the controller determines a moving distance of the moving body in the irregular section on the basis of the position detected by the second position detector and determines the position of the moving body on the basis of the determined moving distance.

A position detection device for detecting a position of a moving body moving on a movement path on which magnets with south poles and magnets with north poles are alternately disposed, the device comprising:

• a first position detector disposed in the moving body and configured to detect the position of the moving body by detecting poles of the magnets;
• a second position detector disposed in the moving body, disposed in a different position from a position of the first position detector in a moving direction of the moving body, and configured to detect the position of the moving body;
• and
• a controller configured to determine the position of the moving body on a basis of a position detected by the second position detector when the first position detector is located in an irregular section in which the poles of the magnets are not disposed regularly,
• wherein the irregular section is a section in which the magnets with south poles and magnets with north poles are not alternately disposed, and
• wherein when the first position detector is located in the irregular section, the controller determines a moving distance of the moving body in the irregular section on the basis of the position detected by the second position detector and determines the position of the moving body on the basis of the determined moving distance.