Surface non-uniformity determination with radio waves

Patent metadata

Field	Value
Publication number	US-9804258-B2
Application number	US-201514633814-A
Country	US
Kind code	B2
Filing date	Feb 27, 2015
Priority date	Feb 27, 2015
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

Various embodiments that pertain to surface non-uniformity detection through use of radio waves are described. A vehicle can transmit radio waves to an area the vehicle is traveling to, such as a road in front of an automobile. The automobile can receive and process returned radio waves to determine if the road has a non-uniformity, such as a significant pothole or speed bump. If the road has the non-uniformity, then a driver of the automobile can be alerted so the driver can decide if evasive action should be taken and take such action if appropriate.

First claim

What is claimed is:

1. A system, comprising:
a transmission component configured to transmit a transmission radio wave from a vehicle toward a surface upon which the vehicle is travelling;
a reception component configured to receive a reflected radio wave at the vehicle from the surface, the reflected radio wave is a reflection of the transmission radio wave off the surface;
a comparison component configured to compare the reflected radio wave against the transmission radio wave to produce a comparison result;
a determination component configured to determine if the surface has a non-uniformity through use of the comparison result;
a threshold component configured to determine if the non-uniformity meets a threshold of significance;
an alert component configured to cause expression of an alert to an occupant of the vehicle when the non-uniformity meets the threshold of significance;
an adjustment component configured to adjust the threshold of significance in response to an instruction from an occupant of the vehicle; and
a characteristic component configured to set a characteristic of the transmission radio wave based, at least in part, on the threshold of significance,
where the transmission component, the reception component, the comparison component, the determination component, the threshold component, the alert component, the adjustment component, the characteristic component, or a combination thereof is implemented, at least in part, by way of non-software.

2. The system of claim 1 , comprising:
a terrain component configured to identify a terrain type of the surface; and
a set component configured to set the threshold of significance based, at least in part, on the terrain type.

3. The system of claim 1 ,
where the transmission radio wave comprises a first wave and a second wave transmitted in a divergent arrangement to the surface such that the first wave makes contact with the surface at a first location and the second wave makes contact with the surface at a second location different from the first location,
where the characteristic is applied to the first wave and the second wave, and
where the reflected radio wave comprises a first reflected wave that is a reflection of the first wave from the surface and a second reflected wave that is a reflection of the second wave from the surface.

4. The system of claim 3 , where the comparison component is configured to compare the first reflected wave against the second reflected wave to produce the comparison result.

5. The system of claim 3 , where the first wave and the second wave are of the same wavelength.

6. The system of claim 5 , comprising:
a terrain component configured to identify a terrain type of the surface; and
a set component configured to set the threshold of significance based, at least in part, on the terrain type.

7. The system of claim 3 , where the first wave and the second wave are of different wavelengths.

8. The system of claim 7 , comprising:
a terrain component configured to identify a terrain type of the surface; and
a set component configured to set the threshold of significance based, at least in part, on the terrain type.

9. The system of claim 1 ,
where the comparison component is configured to normalize the reflected radio wave to a normalized version of the reflected radio wave and configured to normalize the transmission radio wave to a normalized version of the transmission radio wave,
where the comparison component is configured to compare the normalized version of the reflected radio wave and the normalized version of the transmission radio wave to produce the comparison result, and
where the normalization compensates for a difference set between the reflected radio wave and the transmission radio wave not caused by the non-uniformity.

10. The system of claim 1 ,
where the alert component does not cause expression of the alert to the occupant of the vehicle when the non-uniformity does not meet the threshold of significance.

11. The system of claim 1 ,
where the vehicle is an automobile and
where the non-uniformity is such that the automobile is capable of driving over the non-uniformity.

12. The system of claim 1 , comprising:
a selection component configured to make a selection of the alert from an alert set,
where the selection is based, at least in part, on an intensity of the non-uniformity.

13. The system of claim 1 ,
where the characteristic is a wavelength of the transmission radio wave and
where the wavelength corresponds to the threshold of significance such that the lower the threshold of significance, then the shorter the wavelength.

14. A method, performed, at least in part, by a vehicle while traveling, comprising:
identifying a terrain type of a surface;
setting a value of a threshold based, at least in part, on the terrain type;
comparing a transmitted wave of a simile transmission wavelength against a reflected wave to produce a comparison conclusion; and
determining if a surface has a non-uniformity through use of the comparison conclusion
determining if the non-uniformity meets the threshold; and
causing expression of an alert to an occupant of the vehicle when the non-uniformity meets the threshold,
where the transmitted wave is transmitted from the vehicle to the surface and
where the reflected wave is reflected from the surface to the vehicle.

15. The method of claim 14 ,
where the transmitted wave comprises a first wave and a second wave transmitted in a divergent arrangement such that the first wave makes contact with the surface at a first location and the second wave makes contact with the surface at a second location different from the first location and
where the reflected wave comprises a first reflected wave that is a reflection of the first wave from the surface and a second reflected wave that is a reflection of the second wave from the surface.

16. A method, performed, at least in part, by a processor associated with a vehicle, comprising:
comparing a first reflected radio wave against a second reflected radio wave to produce a comparison outcome;
determining if a surface has a non-uniformity through use of the comparison outcome;
determining if the non-uniformity meets a standard;
causing expression of an alert to an occupant of the vehicle when the non-uniformity meets the standard;
obtaining a command to change the standard;
making an interpretation of the command; and
adjusting the standard in accordance with the interpretation of the command,
where a first transmitted radio wave of a first wavelength is transmitted from the vehicle to the surface,
where the first reflected radio wave is the first transmitted radio wave reflected from the surface to the vehicle
where a second transmitted radio wave of a second wavelength different from the first wavelength is transmitted from the vehicle to the surface, and
where the second reflected radio wave is the second transmitted radio wave reflected from the surface to the vehicle.

17. The method of claim 16 , comprising:
determining if a terrain type of the surface merits modification of the standard; and
modifying the standard if it is determined that modification is merited.

18. The method of claim 17 , comprising:
comparing the first transmitted radio wave against the first reflected radio wave to produce the comparison outcome; and
comparing the second transmitted radio wave against the second reflected radio wave to produce the comparison outcome.

19. The method of claim 1

Assignees

• Us Army

Inventors

• Suarez John

Classifications

• G01S13/931

  of land vehicles · CPC title

• G01S2013/93271

  in the front of the vehicles · CPC title

• G01S7/412 Primary

  based on a comparison between measured values and known or stored values · CPC title

• G01S13/87

  Combinations of radar systems, e.g. primary radar and secondary radar · CPC title

• G01S2013/9375

  Physics · mapped topic