Systems and methods for roadway fingerprinting

Patent metadata

Field	Value
Publication number	US-10612199-B2
Application number	US-201715591099-A
Country	US
Kind code	B2
Filing date	May 9, 2017
Priority date	May 9, 2017
Publication date	Apr 7, 2020
Grant date	Apr 7, 2020

Abstract

Systems, methods, and other embodiments described herein relate to acquiring embedded information from a roadway. In one embodiment, a method includes, in response to receiving a reflected signal resulting from a scanning signal interacting with the roadway, analyzing the reflected signal to detect a roadway signature embedded within the roadway. The method includes computing an identifier of the roadway signature as a function of features associated with the roadway signature that are embodied within the reflected signal. The method includes providing the embedded information about the roadway according to the identifier.

First claim

What is claimed is:

1. A detection system for acquiring embedded information of a roadway, comprising:
one or more processors;
a memory communicably coupled to the one or more processors and storing:
an identification module including instructions that when executed by the one or more processors cause the one or more processors to, in response to receiving a reflected signal resulting from a scanning signal interacting with the roadway, analyze the reflected signal to detect a roadway signature embedded within the roadway, wherein the roadway signature is a pattern comprised of sections of contrasting reflectivity using an electromagnetic absorbing material that is dispersed within a surface of the roadway between lane boundaries; and
a signature module including instructions that when executed by the one or more processors cause the one or more processors to compute an identifier of the roadway signature as a function of features associated with the roadway signature that are embodied within the reflected signal,
wherein the signature module further includes instructions to provide the embedded information about the roadway according to the identifier.

2. The detection system of claim 1 , wherein the pattern is comprised of the sections of contrasting reflectivity in comparison to the roadway that produce the reflected signal with electromagnetic characteristics embodying the roadway signature, and wherein the pattern is randomly dispersed within a surface of the roadway including one or more discrete portions longitudinally along the roadway.

3. The detection system of claim 1 , wherein the roadway signature further includes a geometric pattern formed from ridges in a surface of the roadway that interact with the scanning signal to produce the reflected signal.

4. The detection system of claim 1 , wherein the identification module further includes instructions to control a radar to transmit the scanning signal, wherein the radar is integrated with a vehicle that is traveling on the roadway,
wherein the identification module further includes instructions to receive the reflected signal by acquiring the reflected signal over a discrete portion of the roadway for the roadway signature that spans the discrete portion, wherein the roadway signature is comprised of a material that attenuates the scanning signal to produce the reflected signal, and
wherein the identification module further includes instructions to receive the reflected signal by receiving the reflected signal when the roadway is covered with precipitation.

5. The detection system of claim 1 , wherein the signature module further includes instructions to compute the identifier by processing the reflected signal according to a fingerprinting heuristic to generate the identifier as a characterization of the roadway signature, and
wherein the features are registering minutiae that are defined according to a signature schema.

6. The detection system of claim 5 , wherein the signature module further includes instructions to process the reflected signal by (i) marking the features, (ii) determining relationships between the features, and (iii) calculating the identifier according to the fingerprinting heuristic as a function of the features and the relationships between the features.

7. The detection system of claim 1 , wherein the signature module further includes instructions to provide the embedded information by retrieving the embedded information about a present location of a vehicle using the identifier as a key in a signature lookup, and wherein the embedded information includes one or more of navigation information, geographic coordinates, and roadway information.

8. The detection system of claim 1 , wherein the identification module further includes instructions to receive the reflected signal when a surface of the roadway is covered with precipitation,
wherein the identification module further includes instructions to control a radar that is integrated with a vehicle to receive the reflected signal, and wherein the radar is an array of radar sensors located within a forward section of the vehicle and oriented toward the surface of the roadway.

9. A non-transitory computer-readable medium storing instructions that when executed by one or more processors cause the one or more processors to:
in response to receiving a reflected signal resulting from a scanning signal interacting with a roadway, analyze the reflected signal to detect a roadway signature embedded within the roadway wherein the roadway signature is a pattern comprised of sections of contrasting reflectivity using an electromagnetic absorbing material that is dispersed within a surface of the roadway between lane boundaries;
compute an identifier of the roadway signature as a function of features associated with the roadway signature that are embodied within the reflected signal; and
provide embedded information about the roadway according to the identifier.

10. The non-transitory computer-readable medium of claim 9 , wherein the pattern is comprised of the sections of contrasting reflectivity in comparison to the roadway that produce the reflected signal with electromagnetic characteristics embodying the roadway signature, and wherein the pattern is randomly dispersed within a surface of the roadway including one or more discrete portions longitudinally along the roadway.

11. The non-transitory computer-readable medium of claim 9 , wherein the instructions further include instructions to control a radar to transmit the scanning signal, wherein the radar is integrated with a vehicle that is traveling on the roadway,
wherein the instructions to receive the reflected signal include instructions to acquire the reflected signal over a discrete portion of the roadway for the roadway signature that spans the discrete portion, wherein the roadway signature is comprised of a material that attenuates the scanning signal to produce the reflected signal, and wherein the instructions include instructions to receive the reflected signal by receiving the reflected signal when the roadway is covered with precipitation.

12. The non-transitory computer-readable medium of claim 9 , wherein the instructions to compute the identifier include instructions to process the reflected signal according to a fingerprinting heuristic to generate the identifier as a characterization of the roadway signature, and
wherein the features are registering minutiae that are defined according to a signature schema.

13. The non-transitory computer-readable medium of claim 9 , wherein the instructions to provide the embedded information include instructions to retrieve the embedded information about a present location of a vehicle using the identifier as a key in a signature lookup, and wherein the embedded information includes one or more of navigation information, geographic coordinates, and roadway information.

14. A method of acquiring embedded information of a roadway, comprising:
in response to receiving a reflected signal resulting from a scanning signal interacting with the roadway, analyzing the reflected signal to detect a roadway signature embedded within the roadway, wherein the roadway signature is a pattern comprised of sections of contrasting reflectivity using an electromagnetic absorbing material that is dispersed within a surface of the roadway between lane boundaries;
computing an identifier of the roadway signature as a function of features associated with the roadway signature that are embodied within the reflected signal; and
providing the embedded information about the roadway according to the identifier.

Assignees

• Toyota Res Inst Inc

Inventors

• Pratt Gill A
• Kuffner Jr James J
• Adler James M

Classifications

• E01F9/30 Primary

  Arrangements interacting with transmitters or receivers otherwise than by visible means, e.g. using radar reflectors or radio transmitters (E01F11/00 takes precedence) · CPC title

• G01C7/04

  involving a vehicle which moves along the profile to be traced · CPC title

• G01S13/876

  Combination of several spaced transponders or reflectors of known location for determining the position of a receiver (G01S13/874 takes precedence) · CPC title

• G01S2013/93271

  in the front of the vehicles · CPC title

• G01S2013/9323

  Alternative operation using light waves · CPC title