Position calculation system for mobile robot and charging-stand return system and method using the same
First Claim
1. A position calculation system for a mobile robot comprising:
- a wireless signal source for outputting a wireless signal continuously or periodically; and
a mobile robot which includes a plurality of directional antennas for detecting the wireless signal outputted through the wireless signal source, wherein, the mobile robot calculates a direction of the wireless signal source via a rotation angle detected by the directional antennas, and calculates a distance separated from the wireless signal source using a wireless signal detection time difference between the directional antennas.
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Accused Products
Abstract
Disclosed herein is a mobile robot which is capable of accurately calculating a position of the wireless signal source using a wireless signal, and allowing the mobile robot to accurately and rapidly return to a charging-stand using the calculated position. The position calculation system for a mobile robot includes: a wireless signal source for outputting a wireless signal continuously or periodically; and a mobile robot which includes a plurality of directional antennas for detecting the wireless signal outputted through the wireless signal source, wherein, the mobile robot calculates a direction of the wireless signal source via a rotation angle detected by the directional antennas, and calculates a distance separated from the wireless signal source using a wireless signal detection time difference between the directional antennas.
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Citations
20 Claims
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1. A position calculation system for a mobile robot comprising:
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a wireless signal source for outputting a wireless signal continuously or periodically; and a mobile robot which includes a plurality of directional antennas for detecting the wireless signal outputted through the wireless signal source, wherein, the mobile robot calculates a direction of the wireless signal source via a rotation angle detected by the directional antennas, and calculates a distance separated from the wireless signal source using a wireless signal detection time difference between the directional antennas. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for returning a mobile robot to a charging-stand, the system comprising:
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a charging-stand for outputting a wireless signal continuously or periodically; and a mobile robot which includes at least two directional antennas for detecting the wireless signal outputted through the charging-stand, wherein, when a power level remaining in a battery of the mobile robot is below a predetermined value, the mobile robot calculates distance information with respect to the mobile robot separated from the charging-stand using a direction of the charging-stand detected by the directional antennas and using a wireless signal detection time difference between the directional antennas, and returns to the charging-stand on the basis of the distance information. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for returning a mobile robot to a charging-stand, in which the mobile robot includes a position information calculating unit and a charging-stand return processing unit, the method comprising the steps of:
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a) detecting a wireless signal using a directional antenna, wherein the wireless signal is outputted from the charging-stand; b) calculating direction information of the charging-stand and distance information between the charging-stand and the mobile robot, and outputting the calculated direction information and distance information, wherein the position information calculating unit calculates the direction information and distance information using the detected wireless signal; and c) returning the mobile robot to the charging-stand, wherein the charging-stand return processing unit allows the mobile robot to return to the charging-stand on the basis of the direction information and distance information outputted through the position information calculating unit. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification