DYNAMICALLY ADAPTABLE SAFETY ZONES

• US 20110298579A1
• Filed: 06/08/2010
• Published: 12/08/2011
• Est. Priority Date: 06/08/2010
• Status: Abandoned Application

• Current Assignee: Rockwell Automation Safety AG (Rockwell Automation, Inc.)
• Original Assignee: Rockwell Automation Technologies Incorporated (Allen-Bradley Co., Inc.), Cedes Safety & Automation AG
• Inventors: Galera, Richard, Nair, Suresh, Meinherz, Carl, Hardegger, Martin, Berner, Reto, Chen, Wei Jie, Brockman, Craig Martin, Fooks, Elik I., Stein, Manfred, Black, Robert M., Merz, Roger, Eisenbrown, Steven A.
• Application Number:
  US12/795,878
• Publication Number:
  US 20110298579A1
• Time in Patent Office: Days
• US Class Current: 340/3.1
• CPC Class Codes: F16P 3/14 the means being photocells or other devices sensitive without mechanical contact
• CPC Class Codes: G01S 17/10 using transmission of interrupted, pulse-modulated waves determination of distance by phase measurements G01S17/32
• CPC Class Codes: G01S 17/58 Velocity or trajectory determination systems; Sense-of-movement determination systems
• CPC Class Codes: G01S 17/89 for mapping or imaging

Abstract

Systems and methods are provided for defining a safety zone in an industrial automation environment. The method includes monitoring an object that approaches an operating zone where equipment is controlled within the operating zone. This includes determining the speed or direction that the object approaches the operating zone. The method includes dynamically adjusting a safety region in view of the determined speed or direction of the object and enabling or disabling the equipment within the operating zone based in part on the object entering the safety region.

Claims

1. A method for defining a safety zone in an industrial automation environment, comprising:

monitoring an object and operating zone where equipment is controlled within the operating zone;

determining a speed between the object and the equipment;

determining a direction that the object approaches the operating zone;

determining a speed or direction that a moving part associated with the equipment approaches the object;

dynamically adjusting a safety region in view of the determined speed or direction of the object; and

enabling or disabling the equipment within the operating zone based in part on the object entering the safety region.

2. The method of claim 1, employing at least one time of flight sensor to determine the speed or direction that the object approaches the safety region.

3. The method of claim 2, employing multiple time of flight sensors to monitor multiple dimensions for the operating zone, where the dimensions include movements toward the operating zone, movements away from the operating zone, movements from above or below the operating zone, or movements to the sides or circumference of the operating zone.

4. The method of claim 1, further comprising monitoring motion of a portion of the equipment.

5. The method of claim 4, further comprising adjusting safety regions within the operating zone based on speed or direction of the portion of the equipment.

6. The method of claim 4, further comprising monitoring moving equipment and dynamically adjusting a safety region as the moving equipment approaches other objects.

7. The method of claim 1, further comprising dynamically adjusting the safety region based on an operating mode of a machine.

8. The method of claim 7, the operating mode includes production mode, standby mode, disabled mode, maintenance mode, and reduced speed mode.

9. The method of claim 1, further comprising employing an industrial controller to determine the speed or direction.

10. The method of claim 9, employing the industrial controller for enabling or disabling the equipment within the operating zone.

11. The method of claim 1, utilizing a component of a machine as a center of reference for defining a dynamically adjustable safety region.

12. An industrial control system that is employed to monitor and control a safety zone, comprising:

a controller that monitors objects that approach an operating zone where equipment is controlled within the operating zone;

a time of flight sensor that determines the speed or direction that the objects approach the operating zone; and

a logic component associated with the controller to automatically adjust a safety region in view of the determined speed or direction of the objects.

13. The industrial control system of claim 12, the controller enables or disables the equipment within the operating zone based in part on the object entering the safety region.

14. The industrial control system of claim 12, the controller interacts with multiple time of flight sensors to monitor multiple dimensions for the operating zone, where the dimensions include movements toward the operating zone, movements away from the operating zone, movements from above or below the operating zone, or movements to the sides or circumference of the operating zone.

15. The industrial control system of claim 12, the controller monitors motion of a portion of the equipment.

16. The industrial control system of claim 15, the controller dynamically adjusts safety regions within the operating zone based on speed or direction of the portion of the equipment.

17. The industrial control system of claim 12, the controller monitors moving equipment and dynamically adjusts a safety zone as the moving equipment approaches other objects.

18. The industrial control system of claim 12, the controller dynamically adjusts the safety region based on an operating mode of a machine.

20. The industrial control system of claim 12, further comprising a component to alter operation of the equipment within the operating zone based in part on the object entering the safety region.

19. An industrial control system that is employed to monitor and control a safety zone, comprising:

means for monitoring objects that approach an operating zone where equipment is controlled within the operating zone;

means for determining the speed or direction that the objects approach the operating zone; and

means for adjusting a safety region in view of the determined speed or direction of the objects.

21. The system of claim 19, further comprising at least one TOF sensor that is mounted on moving portions of the equipment.