Movement detector

US6246321A · kind A · utility

Assignee

• SIEMENS BUILDING TECHNOLOGIES AG · CH

Inventors

• Martin Rechsteiner · Salt Lake City, US
• Hansjurg Mahler · Rapperswil, CH

Key dates

• Filing date: Jul 1, 1999
• Grant date: Jun 12, 2001
• Expiry date: Jul 1, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G08B29/26
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A device having an image-providing sensor, hereinafter designated as "image sensor," operating in the visible and near-infrared range, an thermal image-providing sensor, hereinafter designated as "thermal-image sensor," operating in the thermal radiation range and having a lower resolution than the image sensor, and an electronic evaluation system. The evaluation system determines whether one or both of the signals generated by the sensors are used for determining whether an alarm condition exists. As a result, the detectability of low-contrast objects is increased, the false alarm rate is reduced, and object classification is made possible.