Method and system for configuring a monitoring device for monitoring a spatial area

Patent metadata

Field	Value
Publication number	US-9695980-B2
Application number	US-201514849890-A
Country	US
Kind code	B2
Filing date	Sep 10, 2015
Priority date	Dec 22, 2005
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A failsafe monitoring device for monitoring a spatial area comprises at least one image recording unit. A three-dimensional image of the spatial area is recorded and a representation of said three-dimensional image is displayed in order to configure the monitoring device. A configuration plane is defined using a plurality of spatial points which have been determined within the three-dimensional image. Subsequently, at least one variable geometry element is defined relative to the configuration plane. A data record which represents a transformation of the geometry element into the spatial area is generated and transferred to the monitoring device.

First claim

What is claimed is:

1. A method for configuring a failsafe monitoring device that failsafely monitors the operation of an automated machine or installation that defines a hazardous area, the failsafe monitoring device comprising at least one image recording unit adapted to generate a three-dimensional image of a spatial area that includes the hazardous area and an evaluation unit connected to said image recording unit for monitoring in real-time the spatial area and failsafely interrupting or altering the operation of said automated machine or installation in response to the detection of a predefined event, the method comprising the steps of:
connecting a non-failsafe programmable computer having a display device to said monitoring device and using said computer to configure a safety zone outside the hazardous area and within said spatial area, wherein said configure step further comprises the steps of:
recording a true three-dimensional image of the spatial area by means of the at least one image recording unit and displaying a representation of said true three-dimensional image on the display device,
defining a virtual boundary between the safety zone and the hazardous area by generating at least one variable geometry element with a selected dimensional configuration and position within said spatial area, with the at least one variable geometry element being superimposed in the selected position onto the displayed representation,
generating a data record representing the selected dimensional configuration and position of the at least one variable geometry element in the spatial area, and
transferring said data record from the non-failsafe programmable computer to said evaluation unit of said failsafe monitoring device;

wherein the evaluation unit thereafter checks the plausibility of said data record, and further
wherein said failsafe monitoring device thereafter monitors the spatial area in real-time to detect when an object breaches the virtual boundary between the safety zone and the hazardous area defined by the at least one variable geometry element, said breach comprising said predefined event.

2. The method of claim 1 , wherein the step of checking the plausibility of said data record includes confirming that the position of the at least one variable geometry element is entirely within the spatial area.

3. The method of claim 1 , wherein the step of transferring said data record to said evaluation unit is performed using error-protection measures.

4. The method of claim 3 , wherein said error-protection measures comprise authentication of the computer transferring said data record and unambiguously identifying the receiving evaluation unit.

5. The method of claim 3 , wherein said error-protection measures comprise using data protection measures such as a cyclic redundancy checksum and encryption of the data record.

6. The method of claim 1 , wherein said step of defining a virtual boundary includes the steps of determining a plurality of spatial points within the true three-dimensional image defining a coordinate system of the spatial area and defining a virtual configuration plane using said spatial points, wherein the selected dimensional configuration and position of said at least one variable geometry element are defined relative to said virtual configuration plane.

7. The method of claim 6 , wherein said at least one variable geometry element has a side face perpendicular to said virtual configuration plane.

8. The method of claim 7 , wherein said virtual boundary comprises at least two variable geometry elements that intersect at a non-zero angle, each of said at least two variable geometry elements having a side face perpendicular to said virtual configuration plane.

9. The method of claim 7 , wherein the at least one variable geometry element is exclusively generated with side faces that are perpendicular to said virtual configuration plane.

10. The method of claim 1 , wherein said virtual boundary comprises a plurality of variable geometry elements that are combined with one another to form said virtual boundary.

11. A system for failsafely monitoring the operation of an automated machine or installation that defines a hazardous area, comprising a failsafe monitoring device having at least one image recording unit for generating a true three-dimensional image of a spatial area that includes the hazardous area and an evaluation unit connected to said image recording unit for monitoring in real-time the spatial area and failsafely interrupting or altering the operation of said automated machine or installation in response to the detection of a predefined event, and a non-failsafe configuration device for configuring the evaluation unit, the non-failsafe configuration device comprising:
a display for displaying a representation of the true three-dimensional image of the spatial area, a first configuration element for defining a virtual boundary between the safety zone and the hazardous area by generating at least one variable geometry element with a selected dimensional configuration and position within said spatial area, with the at least one variable geometry element being superimposed in the selected position onto the displayed representation, a second configuration element for generating a data record representing the selected dimensional configuration and position of the at least one variable geometry element in the spatial area, and a communication interface for transferring the data record from the non-failsafe configuration device to the evaluation unit of the failsafe monitoring device;
wherein the evaluation unit is further configured to thereafter check the plausibility of said data record, and further
wherein said failsafe monitoring device is further configured to thereafter monitor the spatial area in real-time to detect when an object breaches the virtual boundary between the safety zone and the hazardous area defined by the at least one variable geometry element, said breach comprising said predefined event.

12. The system of claim 11 , wherein the evaluation unit is configured to check the plausibility of said data record by confirming that the position of the at least one variable geometry element is entirely within the spatial area.

13. The system of claim 11 , wherein the communication interface is configured to transfer the data record to said evaluation unit using error-protection measures.

14. The system of claim 11 , wherein said first configuration element defines said virtual boundary by determining a plurality of spatial points within the true three-dimensional image defining a coordinate system of the spatial area and defining a virtual configuration plane using said spatial points, and further wherein the selected dimensional configuration and position of said at least one variable geometry element are defined relative to said virtual configuration plane.

15. The system of claim 14 , wherein said at least one variable geometry element has a side face perpendicular to said virtual configuration plane.

16. The system of claim 15 , wherein the at least one variable geometry element is exclusively generated with side faces that are perpendicular to said virtual configuration plane.

17. The system of claim 11 , wherein said virtual boundary comprises a plurality of variable geometry elements that are combined with one another to form said virtual boundary.

18. A non-transitory data storage medium comprising program code which is designed to be executed on a computer in order to carry out a method of configuring a failsafe mon

Assignees

• Pilz Gmbh & Co Kg

Inventors

• Doettling Dietmar
• Fuchs Oliver
• Sugrue James

Classifications

• H04N23/63

  by using electronic viewfinders · CPC title

• G06T7/0008 Primary

  checking presence/absence · CPC title

• H04N13/0203

  Electricity · mapped topic

• G06T7/593

  from stereo images · CPC title

• F16P3/142

  using image capturing devices · CPC title