BEACON TO MEASURE DISTANCE, POSITIONING SYSTEM USING THE SAME, AND METHOD OF MEASURING DISTANCE
First Claim
Patent Images
1. A positioning system comprising:
- a beacon; and
a moving body to communicate with the beacon;
wherein the beacon measures a distance between the moving body and the beacon based on a time difference between a transmission time of a light transmitted by the beacon to detect a position of the moving body and a detecting time of a light reflected by the moving body to the beacon, and the moving body receives phase information and distance information of the transmitted light from the beacon to detect a relative position of the moving body with respect to the beacon.
1 Assignment
0 Petitions
Accused Products
Abstract
A beacon to measure a distance based on a time difference between a transmitted light and a reflected light and to put the measured distance information into the lights, and a positioning system to detect a position of a moving body using the beacon, and a method thereof. Since a relative position of the moving body with respect to the beacon is precisely detected and infrared laser having directionality is used as a light source, the moving body can travel in a wide working area.
24 Citations
28 Claims
-
1. A positioning system comprising:
-
a beacon; and a moving body to communicate with the beacon; wherein the beacon measures a distance between the moving body and the beacon based on a time difference between a transmission time of a light transmitted by the beacon to detect a position of the moving body and a detecting time of a light reflected by the moving body to the beacon, and the moving body receives phase information and distance information of the transmitted light from the beacon to detect a relative position of the moving body with respect to the beacon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A beacon having a light to detect a position of an object to be measured and to measure a distance to the object, the beacon comprising:
-
a light generator to transmit a light having directionality to the object; a reflected light detector to detect a light that is transmitted from the light generator and is reflected by the object; and a distance measuring unit to measure a distance between the beacon and the object based on a difference between a transmission time of the light and a detecting time of the reflected light. - View Dependent Claims (14, 15, 16, 17, 18, 19)
-
-
20. A positioning method of a positioning system in which a moving body moving in a working area distant from a beacon at a fixed position detects its own position, comprising;
-
transmitting a light having directionality from the beacon; measuring a distance between the beacon and the moving body by the beacon receiving the light reflected by the moving body; encoding the measured distance information and a phase information corresponding to the transmission direction of the light into the light; and detecting the position of the moving body based on the phase information and the distance information contained in the encoded light transmitted from the beacon by the moving body receiving the encoded light. - View Dependent Claims (21, 22, 23, 24)
-
-
25. A computer readable recording medium containing computer readable codes to perform a method of detecting a position of an object, the method comprising:
-
transmitting a light having directionality from a beacon; measuring a distance between the beacon and the object by the beacon receiving the light reflected by the object; encoding the measured distance information and a phase information corresponding to a transmission direction of the light into the light; and detecting a position of the object based on the phase information and the distance information contained in the light transmitted from the beacon to object.
-
-
26. A beacon to communicate with an object to determine a position of the object, the beacon comprising:
-
a light generator to transmit a first light and a second light towards the object; a reflected light detector to detect a reflected light of the first light from the object; a distance measuring unit to measure a distance between the beacon and the object according to a time difference between a first time of the first light transmission and a second time of the detected reflected light; and an encoder to encode the information on the measured distance in a packet into the second light to be transmitted to the object.
-
-
27. A mobile robot to communicate with a beacon, the mobile robot comprising:
-
an optical reflector to reflect a first light of the beacon; an optical receiver to receive a second light of the beacon; and a position measuring unit to measure a position of the optical receiver according to information contained in the second light of the beacon.
-
-
28. A positioning system comprising:
-
a beacon to communicate with a mobile robot to determine a position of the mobile robot, the beacon comprising; a light generator to transmit a first light and a second light towards the mobile robot, a reflected light detector to detect a reflected light of the first light from the mobile robot, a distance measuring unit to measure a distance between the beacon and the mobile robot according to a time difference between a first time of the first light transmission and a second time of the detected reflected light, and an encoder to encode the information on the measured distance in a packet into the second light to be transmitted to the mobile robot; and a mobile robot to communicate with the beacon, the mobile robot comprising; an optical reflector to reflect the first light of the beacon, an optical receiver to receive the second light of the beacon, and a position measuring unit to measure a position of the optical receiver according to the information contained in the second light of the beacon.
-
Specification