System and method of calibration for establishing real-time location

Patent metadata

Field	Value
Publication number	US-11039276-B2
Application number	US-201916713354-A
Country	US
Kind code	B2
Filing date	Dec 13, 2019
Priority date	Dec 14, 2018
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

A system and method are provided for obtaining calibration data for a portable device relative to an object in order to facilitate defining a locator for determining a location of the portable device relative to the object. The system and method may obtain calibration data pertaining to a signal characteristic of communications transmitted from the portable device and corresponding to a known location of the portable device (e.g., truth data).

First claim

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A system for obtaining location data for a portable device relative to an object, the system comprising:
an object device disposed in a fixed position relative to the object, the object device having an antenna configured to communicate wirelessly with the portable device via a communication link;
a control system configured to obtain one or more samples for pertaining to communications between the portable device and the object device, the control system configured to obtain a first set of the one or more samples with respect to the portable device being at a first position, the control system configured to obtain a second set of the one or more samples with respect to the portable device being at a second position;
a movable body operably coupled to the portable device, the movable body being configured to position the portable device in accordance with a position directive communicated from the control system, the movable body including a gimbal capable of changing an angular orientation of the portable device independent of a position of the movable body; and
the control system configured to direct movement of the movable body to change a position of the portable device from the first position to the second position.

2. The system of claim 1 wherein the movable body is configured to change the angular orientation of the portable device in accordance with an orientation directive communicated from the control system.

3. The system of claim 2 wherein the movable body is configured to change the angular orientation from a first orientation at the first position to a second orientation at the first position, wherein the control system is configured to obtain the first set of the one or more samples at the first orientation at the first position and to obtain the second set of the one or more samples at the second orientation at the second position.

4. The system of claim 1 comprising a locator operable for calibration based on the one or more samples obtained with respect to communications with the portable device, and wherein the locator is configured to provide an output based on input indicative of a signal characteristic of communications, wherein the output is indicative of a location of the portable device relative to the object.

5. The system of claim 1 wherein the first set of the one or more samples includes at least a first one of the one or more samples.

6. The system of claim 1 wherein the object is a vehicle having a vehicle cabin that defines an interior space of the vehicle.

7. The system of claim 1 wherein the one or more samples include information pertaining to a signal characteristic of communications, the position of the portable device during measurement of the signal characteristic, and an angular orientation of the portable device during measurement of the signal characteristic.

8. The system of claim 7 wherein the signal characteristic is a signal strength of communications from the portable device to the antenna of the object device.

9. The system of claim 1 wherein the position of the portable device during a measurement of a signal characteristic is stored separate from the one or more samples and correlated with the one or more samples based on time of sampling.

10. The system of claim 1 comprising a plurality of object sensor devices, wherein each of the plurality of object sensor devices is disposed in a fixed position relative to the object, and wherein a signal characteristic of communications is obtained with respect to each of the plurality of object sensor devices.

11. The system of claim 1 wherein a plurality of signal characteristics is obtained by the object device, and wherein the plurality of signal characteristics are different from each other.

12. A system for obtaining location data for a portable device relative to an object, the system comprising:
an object device disposed in a fixed position relative to the object, the object device having an antenna configured to communicate wirelessly with the portable device via a communication link;
a control system configured to obtain one or more samples for pertaining to communications between the portable device and the object device, the control system configured to obtain a first set of the one or more samples with respect to the portable device being at a first position, the control system configured to obtain a second set of the one or more samples with respect to the portable device being at a second position;
a movable body operably coupled to the portable device, the movable body being configured to position the portable device in accordance with a position directive communicated from the control system;
the control system configured to direct movement of the movable body to change a position of the portable device from the first position to the second position;
one or more flexible members each having a first end and a second end;
a main portion of the movable body being coupled to the first end of each of the one or more flexible members; and
one or more support members disposed in a fixed position relative to the object and coupled respectively to the second end of at least one of the one or more flexible members.

13. The system of claim 12 wherein:
the one or more support members includes a first support member, a second support member, and a third support member;
the one or more flexible members includes a first flexible member, a second flexible member, and a third flexible member;
the second end of the first flexible member is coupled to the first support member;
the second end of the second flexible member is coupled to the second support member; and
the second end of the third flexible member is coupled to the third support member.

14. The system of claim 13 wherein each of the first, second, and third support members is configured to reel and unreel respectively the first, second, and third flexible members, whereby the position of the movable body in three-dimensional space is adjustable by controlling an unreeled length of the first, second, and third flexible members.

15. The system of claim 12 comprising a first beam and a second beam disposed at least partially in an interior space of the object, wherein the one or more support members is operably coupled to the first beam and the second beam and movable in a two-dimensional plane relative to and defined by the first beam and the second beam, wherein the one or more flexible members includes a first flexible member capable of being adjusted in length to change a displacement of the movable body relative to the two-dimensional plane.

16. A method of determining location information pertaining to a location of a remote device relative to an object, the method comprising:
providing a reference device capable of communicating wirelessly with the object via a communication link;
providing a gimbal operably coupled to the reference device to control an angular orientation of the reference device independent of a position of the reference device in three-dimensional space;
disposing the reference device at a first position relative to the object;
obtaining one or more first position samples for a signal characteristic of communications with the reference device at the first position;
automatically moving the reference device from the first position to a second position relative to the object; and
obtaining one or more second position samples for the signal characteristic of communications with the referenc

Assignees

• Denso Int America Inc
• Denso Corp

Inventors

• Smith Eric J
• Stitt R Michael
• Jager Karl

Classifications

• H04B17/21

  for calibration; for correcting measurements · CPC title

• H04W4/40

  for vehicles, e.g. vehicle-to-pedestrians [V2P] · CPC title

• H04W4/026 Primary

  using orientation information, e.g. compass · CPC title

• H04B17/0082

  using service channels; using auxiliary channels · CPC title

• H04B17/27 Primary

  for locating or positioning the transmitter · CPC title