Device for adjusting and self-testing inertial sensors, and method

Patent metadata

Field	Value
Publication number	US-2016170502-A1
Application number	US-201514962881-A
Country	US
Kind code	A1
Filing date	Dec 8, 2015
Priority date	Dec 12, 2014
Publication date	Jun 16, 2016
Grant date	—

Abstract

A device includes a camera, a processing unit, and at least one inertial sensor. The processing unit is set up to determine a first movement profile of the device from movement data of the at least one inertial sensor. The processing unit is set up to determine a second movement profile of the device from image data of an object observed using the camera.

First claim

What is claimed is:

1 . A device comprising:
a camera; a processing unit; and at least one inertial sensor; wherein the processing unit is configured to (i) determine a first movement profile of the device based on movement data of the at least one inertial sensor, and (ii) determine a second movement profile of the device based on image data of an object observed using the camera.

2 . The device as recited in claim 1 , wherein the second movement profile of the device is determined based on image data of a two-dimensional object observed using the camera, the two-dimensional object having a regular, multiply recurring image pattern.

3 . The device as recited in claim 2 , wherein the processing unit is configured to compare the second movement profile with the first movement profile.

4 . The device as recited in claim 3 , wherein the processing unit is configured to provide an item of adjustment information for an adjustment of the at least one inertial sensor based on a comparison of the first movement profile with the second movement profile.

5 . The device as recited in claim 3 , wherein the at least one inertial sensor is a rotational rate sensor, and the processing unit is configured to provide an item of adjustment information for an offset calibration of the rotational rate sensor based on a comparison of the first movement profile with the second movement profile.

6 . The device as recited in claim 2 , wherein the processing unit is configured to determine the sensitivity of the at least one inertial sensor.

7 . A method for self-testing an inertial sensor, comprising:
(A) providing a device including a camera, a processing unit, and at least one inertial sensor; (B) providing an object; (C) providing movement of the device relative to the object; (D) during the movement of the device relative to the object, (i) continuously observing the object by the camera at least at selected times, (ii) recording movement data of the at least one inertial sensor, and (iii) recording image data captured by the camera; (E) determining a first movement profile of the device based on the movement data of the at least one inertial sensor; and (F) determining a second movement profile of the device based on the image data captured by the camera.

8 . The method as recited in claim 7 , wherein in step (B), a two-dimensional object having a regular, multiply recurring image pattern is provided.

9 . The method as recited in claim 8 , further comprising:
(G) comparing the first movement profile and the second movement profile with one another.

10 . The method as recited in claim 9 , wherein a latency between the camera and the at least one inertial sensor is determined through correlation of the first movement profile and the second movement profile.

11 . The method as recited in claim 10 , wherein the latency between the camera and the at least one inertial sensor is compensated.

12 . A non-transitory, computer-readable data storage medium storing a computer program having program codes which, when executed on a computer, perform a method for self-testing an inertial sensor, the method comprising:
(A) providing a device including a camera, a processing unit, and at least one inertial sensor; (B) providing an object; (C) providing movement of the device relative to the object; (D) during the movement of the device relative to the object, (i) continuously observing the object by the camera at least at selected times, (ii) recording movement data of the at least one inertial sensor, and (iii) recording image data captured by the camera; (E) determining a first movement profile of the device based on the movement data of the at least one inertial sensor; and (F) determining a second movement profile of the device based on the image data captured by the camera.

Assignees

• Bosch Gmbh Robert

Inventors

• Dorsch Rainer
• Haubelt Christian
• Claus Thomas
• Bichler Rudolf
• Middendorf Lars

Classifications

• G06F3/0304

  Detection arrangements using opto-electronic means (constructional details of pointing devices not related to the detection arrangement using opto-electronic means G06F3/033; optical digitisers G06F3/042) · CPC title

• G06F3/0346 Primary

  with detection of the device orientation or free movement in a three-dimensional [3D] space, e.g. 3D mice, 6-DOF [six degrees of freedom] pointers using gyroscopes, accelerometers or tilt-sensors · CPC title

• G06F1/1694

  the I/O peripheral being a single or a set of motion sensors for pointer control or gesture input obtained by sensing movements of the portable computer · CPC title

• H04M1/72454

  according to context-related or environment-related conditions · CPC title

• H04M2250/52

  including functional features of a camera · CPC title