Data reading system and method for multi-view imaging using an adjustable mirror

• US 10,002,271 B2
• Filed: 11/03/2014
• Issued: 06/19/2018
• Est. Priority Date: 11/04/2013
• Status: Active Grant

• Current Assignee: Datalogic USA, Inc.
• Original Assignee: Datalogic USA, Inc.
• Inventors: Olmstead, Bryan L., Shearin, Alan
• Primary Examiner(s): STANFORD, CHRISTOPHER J
• Application Number:
  US14/531,589
• Publication Number:
  US 20150122890A1
• Time in Patent Office: 1,324 Days
• CPC Class Codes: G06K 7/10603 Basic scanning using moving elements
• CPC Class Codes: G06K 7/10831 Arrangement of optical elements, e.g. lenses, mirrors, prisms optical elements per se G02B
• CPC Class Codes: G06K 7/10871 randomly oriented data-fields, code-marks therefore, e.g. concentric circles-code
• CPC Class Codes: G07G 1/0045 with a code reader for reading of an identifying code of the article to be registered, e.g. barcode reader or radio-frequency identity [RFID] reader

Abstract

An automated checkout system for data reading, and related methods of use, the checkout system including a portal scanner and a conveyor for transporting items, the portal scanner housing a data reader with a view volume directed at a steerable mirror. In one example, the steerable mirror moves between various positions to augment the effective view volume of the data reader for capturing data from various surfaces of the item being transported on the conveyor. The portal scanner may include one or more mirrors arranged in an angular configuration to redirect the view volume of the data reader to capture data from the various surfaces of the item.

Claims

1. An automated checkout system for reading encoded data from an item, the automated checkout system comprising:

a portal scanner having a first leg section spaced apart from a second leg section, and a top arch section extending across from the first leg section to the second leg section, wherein the first leg section includes a first plurality of mirrors and the second leg section includes a second plurality of mirrors;

a steerable mirror supported by the top arch section;

an imaging system supported by the top arch section, the imaging system having a view volume directed toward the steerable mirror;

an actuator;

a controller in operative communication with the actuator and the steerable mirror, the controller storing a plurality of control schemes including a first control scheme and a second control scheme, the controller operable to select between the first and second control schemes, wherein the controller is programmed to drive the actuator and move the steerable mirror through a plurality of positions based on a selected one of the first control scheme or the second control scheme, wherein during the first control scheme, the controller drives the actuator, which in turn, drives the steerable mirror along a first movement pattern through a first plurality of positions, where at each position in the first plurality of positions, the steerable mirror redirects the view volume of the imaging system toward one mirror of the first plurality of mirrors and the second plurality of mirrors, and wherein during the second control scheme, the controller drives the actuator, which in turn, drives the steerable mirror along a second movement pattern through a second plurality of positions, where at each position in the second plurality of positions, the steerable mirror redirects the view volume of the imaging system toward one mirror of the first plurality of mirrors and the second plurality of mirrors;

wherein the imaging system stitches together a plurality of images from one or more of the plurality of regions to collectively form a read region of the portal scanner for reading an optical code from an item being passed through the read region; and

a conveying system operable for transporting the item through the read region of the portal scanner.

2. The automated checkout system of claim 1, the portal scanner further comprising:

a first mirror supported by or adjacent to the first leg section; and

a second mirror supported by or adjacent to the second leg section,

wherein the first plurality of positions includes a first position, a second position, a third position, and a fourth position, and wherein the controller drives the actuator, which in turn, drives the steerable mirror from the first position to the second position, from the second position to the third position, and from the third position to the fourth position, the steerable mirror redirecting the view volume toward the first mirror on the first leg section when in the third position, and redirecting the view volume toward the second mirror on the second leg section when in the fourth position.

3. The automated checkout system of claim 2, wherein the controller drives the actuator, which in turn, drives the steerable mirror in a step-wise progression from the first position to the second position, from the second position to the third position, and from the third position to the fourth position.

4. The automated checkout system of claim 3, further comprising:

a counter structure supporting the portal scanner and the conveying system;

a sensor configured to sense a presence of the item on the conveying system and to transmit a signal to the steerable mirror in response to sensing the presence of the item on the conveying system,

wherein the controller drives the actuator, which in turn, drives the steerable mirror through the step-wise progression in response to the steerable mirror receiving the signal from the sensor.

5. The automated checkout system of claim 1, further comprising a housing structure supported by the top arch section, the housing structure enclosing both the steerable mirror and the imaging system.

6. The automated checkout system of claim 5, wherein the imaging system includes a fixed focus lens system, and wherein the housing structure includes a scan window through which the view volume of the imaging system is directed, the scan window including at least one window segment bearing corrective optics.

7. The automated checkout system of claim 1, wherein the top arch section includes a scan window through which the view volume of the imaging system is directed, the scan window including at least one window segment bearing corrective optics.

8. The automated checkout system of claim 1, the steerable mirror further comprising:

a chassis;

a mirror; and

an elastomeric flexure coupled to the mirror and the chassis, wherein the flexure supports movement of the mirror on two axes.

9. The automated checkout system of claim 1, wherein the first movement pattern of the first control scheme includes a step-wise progression, the controller driving the actuator, which in turn, drives the steerable mirror from a first position to a second position and from the second position to a third position, wherein the actuator rests prior to subsequent movement of the steerable mirror from the first position to the second position, and from the second position to the third position, and wherein the second movement pattern of the second control scheme includes a non-stop, continuous cycling progression, the controller driving the actuator, which in turn, drives the steerable mirror from a fourth position to a fifth position, and from the fifth position to a sixth position, and from the sixth position back to the fourth position.

10. The automated checkout system of claim 1, wherein the imaging system stitches together a plurality of images from one or more of the plurality of regions to collectively form a 360-degree collective view laterally around the item being passed through the read region.

11. The automated checkout system of claim 1, further comprising a sensor configured to obtain a shape and size of the item on the conveying system.

12. The automated checkout system of claim 1, wherein the first plurality of positions includes a default position, and wherein during the first control scheme, the controller drives the actuator from the default position to a first position, from the first position to a second position, from the second position to a third position, and from the third position to the default position.

13. The automated checkout system of claim 12, wherein the during the second control scheme, the controller drives the actuator from the default position to a fourth position, from the fourth position to a fifth position, from the fifth position to a sixth position, and from the sixth position to the default position.

14. An automated checkout system for reading encoded data from an item, the automated checkout system comprising:

a portal scanner having a first leg section spaced apart from a second leg section, and a top arch section extending across from the first leg section to the second leg section, wherein the first leg section includes a first plurality of mirrors and the second leg section includes a second plurality of mirrors;

a steerable mirror supported by the top arch section;

an imaging system including a variable focus lens system, the imaging system supported by the top arch section, the imaging system having a view volume directed toward the steerable mirror

an actuator;

a controller in operative communication with the actuator and the steerable mirror, the controllable storing a plurality of control schemes including a first control scheme and a second control scheme, the controller operable to select between the first and second control schemes, wherein the controller is programmed to drive the actuator and move the steerable mirror through a plurality of positions based on a selected one of the first control scheme or the second control scheme, wherein during the first control scheme, the controller drives the actuator, which in turn, drives the steerable mirror along a first movement pattern through a first plurality of positions, where at each position in the first plurality of positions, the steerable mirror redirects the view volume of the imaging system toward one mirror of the plurality of mirrors and the second plurality of mirrors, and wherein during the second control scheme, the controller drives the actuator, which in turn, drives the steerable mirror moves along a second movement pattern through a second plurality of positions, where at each position in the second plurality of positions, the steerable mirror redirects the view volume of the imaging system toward one mirror of the first plurality of mirrors and the second plurality of mirrors;

wherein the imaging system stitches together a plurality of images from one or more of the plurality of regions to collectively form a read region of the portal scanner for reading an optical code from an item being passed through the read region; and

a conveying system operable for transporting the item through the read region of the portal scanner.

15. The automated checkout system of claim 14, the portal scanner further comprising:

a first mirror supported by or adjacent to the first leg section; and

a second mirror supported by or adjacent to the second leg section,

wherein the plurality of positions includes a default position, a first position, a second position, a third position, and a fourth position, and wherein the controller drives the actuator, which in turn, drives the steerable mirror from the default position to the first position, from the first position to the second position, from the second position to the third position, from the third position to the fourth position, and from the fourth position to the default position, the steerable mirror redirecting the view volume toward the first mirror on the first leg section when in the third position, and redirecting the view volume toward the second mirror on the second leg section when in the fourth position.

16. The automated checkout system of claim 14, further comprising:

a sensor configured to sense a location of the item on the conveying system and to transmit a signal to the imaging system in response to sensing the location of the item on the conveying system,

wherein the imaging system is further configured to adjust the focus of the variable focus lens system in response to receiving the signal from the sensor.

17. The automated checkout system of claim 14, wherein the first movement pattern of the first control scheme includes a step-wise progression, the actuator driving the steerable mirror from a first position to a second position and from the second position to a third position, wherein the actuator rests prior to subsequent movement from the first position to the second position, and from the second position to the third position, and wherein the second movement pattern of the second control scheme includes a non-stop, continuous cycling progression, the actuator driving the steerable mirror from a fourth position to a fifth position, and from the fifth position to a sixth position, and from the sixth position back to the fourth position.

18. The automated checkout system of claim 14, wherein the imaging system stitches together a plurality of images from one or more of the plurality of regions to collectively form a 360-degree collective view laterally around the item being passed through the read region.

19. The automated checkout system of claim 14, further comprising a sensor configured to obtain a shape and size of the item on the conveying system.