Patent · US Expired

Protective device for safeguarding a hazardous area and method of checking the functional reliability of such a device

US7310109B2 · kind B2 · utility

24Cited by

16References

13Claims

0Family size

Assignee

Pilz GmbH & Co. · DE

Inventors

Dietmar Dottling · Echterdingen, DE
Oliver Fuchs · Offenbach am Main, DE
Mathias Sälzer · Reichenbach, DE
Martin Wendler · Glückstadt, DE
Christoph Weishaar · Waiblingen, DE

Key dates

Filing date	Oct 4, 2002
Grant date	Dec 18, 2007
Priority date	—
Expiry date	Dec 19, 2024

Classification

Technology area (CPC H)Electricity
CPC primaryH04N17/002
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The present invention discloses a protective device for safeguarding a hazardous area and a method for checking the functional reliability of such a device. The protective device has an image recording unit with an image sensor which includes a large number of light-sensitive pixels. During operation, the image recording unit records an object image. The image sensor is also supplied with a defined test image in order to check the functional reliability, wherein the test image recorded by the image sensor is compared with a defined expectation. According to one aspect of the invention, the object image is specifically made dynamic by means of a testing device and the modified object image is used as the test image.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.