Visible light positioning receiver arrangement and two stage positioning method

Patent metadata

Field	Value
Publication number	US-11280875-B2
Application number	US-201917253607-A
Country	US
Kind code	B2
Filing date	May 30, 2019
Priority date	Jun 29, 2018
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

A visible light positioning receiver arrangement for obtaining spatial position information of the receiver arrangement from a plurality of luminaires (5), at least one of the luminaires including at least one associated modulated light source for transmitting a light signal providing positional information of one or more reference points associated with the luminaire, said receiver arrangement including: an imaging receiver for capturing an image of the luminaires and associated said reference point(s); and a non-imaging receiver (7) for estimating an angle of arrival (AOA) of light from each said modulated light source, and for decoding the reference point positional information therefrom; wherein said AOA information and reference point positional information from the non-imaging receiver is matched to the image captured by the imaging receiver to obtain said spatial position information.

First claim

The invention claimed is:

1. A visible light positioning receiver arrangement for obtaining spatial position information of the receiver arrangement from a plurality of luminaires, at least one of the luminaires including at least one associated modulated light source for transmitting a light signal providing positional information of one or more reference points associated with that luminaire, said receiver arrangement including:
an imaging receiver for capturing an image of the luminaires and associated said reference point(s); and
a non-imaging receiver for estimating an angle of arrival (AOA) of light from each said modulated light source, and for decoding the reference point positional information therefrom;
wherein said AOA information and reference point positional information from the non-imaging receiver is matched to the image captured by the imaging receiver to obtain said spatial position information.

2. A visible light positioning receiver arrangement according to claim 1 , wherein the imaging receiver is in the form of a camera.

3. A visible light positioning receiver arrangement according to claim 1 , wherein the non-imaging receiver is in the form of an aperture receiver.

4. A visible light positioning receiver arrangement according to claim 3 , wherein the aperture receiver is a quadrant angular diversity aperture receiver (QADA).

5. A visible light positioning receiver arrangement according to claim 1 , wherein each said luminaire provides the modulated light source through modulation of the light from the said luminaire.

6. A visible light positioning receiver arrangement according to claim 1 , wherein the modulated light source is located on or adjacent the luminaire.

7. A visible light positioning receiver arrangement according to claim 6 , wherein the modulated light source emits IR or other light at a frequency not visible to a human eye.

8. A visible light positioning receiver arrangement according to claim 1 , wherein the reference point is the location of the modulated light source.

9. A visible light positioning receiver arrangement according to claim 1 , wherein the reference point is the location of a physical feature of the luminaire, such as the corner or centroid of the luminaire.

10. A visible light positioning receiver arrangement according to claim 1 , wherein the reference point is one or more visible marks provide on or adjacent to the luminaire.

11. A visible light positioning method for obtaining spatial position information of a visible light positioning receiver arrangement from a plurality of luminaires, at least one of the luminaires including at least one associated modulated light source for transmitting a modulated light signal providing positional information of one or more reference points associated with the luminaire, the method including:
a) obtaining an image of multiple luminaires and associated said reference points using an imaging receiver of the receiver arrangement;
b) estimating angle of arrival (AOA) information from each said modulated light source using a non-imaging receiver of the receiver arrangement;
c) further using the non-imaging receiver to receive said reference point positional information transmitted from each said modulated light source; and
d) matching said AOA information and reference point position information from the non-imaging receiver with the image captured by the imaging receiver to thereby obtain said spatial position information.

12. A visible light positioning method according to claim 11 , wherein the imaging receiver is in the form of a camera.

13. A visible light positioning method according to claim 11 , wherein the non imaging receiver is in the form of an aperture receiver.

14. A visible light positioning method according to claim 13 , wherein the aperture receiver is a quadrant angular diversity aperture receiver (QADA).

15. A visible light positioning method according to claim 11 , wherein each said luminaire provides the modulated light source through modulation of the light from the said luminaire.

16. A visible light positioning method according to claim 11 , wherein the modulated light source is located on or adjacent the luminaire.

17. A visible light positioning method according to claim 16 , wherein the modulated light source emits IR or other light at a frequency not visible to a human eye.

18. A visible light positioning method according to claim 11 , wherein the reference point is the location of the modulated light source.

19. A visible light positioning method according to claim 11 , wherein the reference point is the location of a physical feature of the luminaire such as the corner or centroid of the luminaire.

20. A visible light positioning method according to claim 11 , wherein the reference point is one or more visible marks provide on or adjacent to the luminaire.

Assignees

• Univ Monash

Inventors

• Cincotta Stefanie
• Neild Adrian
• Armstrong Jean

Classifications

• H04B10/116

  Visible light communication · CPC title

• G01S1/7032

  Transmitters · CPC title

• G01S1/7034

  Mounting or deployment thereof · CPC title

• G01S1/045

  Receivers · CPC title

• G01S5/16 Primary

  using electromagnetic waves other than radio waves · CPC title