Motion sensor with LED aiming aid

• US 7,459,672 B2
• Filed: 01/19/2007
• Issued: 12/02/2008
• Est. Priority Date: 01/19/2007
• Status: Active Grant

• Current Assignee: Jenesis International, Inc.
• Original Assignee: Jenesis International, Inc.
• Inventors: McCavit, Kim I., Jensen, Bradford B.
• Primary Examiner(s): Epps; Georgia Y.
• Assistant Examiner(s): WYATT, KEVIN S
• Application Number:
  US11/655,671
• Publication Number:
  US 20080174429A1
• Time in Patent Office: 683 Days
• Field of Search: 250/221, 340/555, 396/153
• US Class Current: 250/221
• CPC Class Codes: G08B 13/193 using focusing means
• CPC Class Codes: G08B 29/22 Provisions facilitating manual calibration, e.g. input or output provisions for testing; Holding of intermittent values to permit measurement

Abstract

A motion sensor incorporates an internal light source, typically a super bright LED. A multi-lens system or an arrangement of small windows in front of the LED projects a visible light pattern that mimics the detection pattern of the motion sensor to an observer standing in the detection zone and looking at the sensor.

Claims

1. A motion sensor comprising:

an enclosure;

a sensing element installed in the enclosure having a detection zone exterior to the enclosure;

an alignment light within the enclosure activated in response to installer selected conditions;

optical projection elements installed on or within the enclosure and relative to the alignment light to project light emitted from the alignment light visible only to an observer located within a target area for the detection zone.

2. A motion sensor as set forth in claim 1, further comprising:

a plurality of detection zones within the target area.

3. A motion sensor as set forth in claim 1, further comprising:

the alignment light is a light emitting diode; and

a manual trigger for activating the alignment light.

4. A motion sensor as set forth in claim 3, further comprising:

a plurality of detection zones exhibiting gaps between the detection zones;

an optical sensor element;

a lens system for collecting infrared light from the target area for the optical sensor element; and

the optical projection elements and relative positioning of the light emitting diode to the optical projection elements being configured to generate a projection pattern within the target area for the plurality of detection zones.

5. A motion sensor as set forth in claim 4, wherein the sensing element is a passive infrared detector.

6. A motion sensor as set forth in claim 3, further comprising:

a secondary indicator responsive to the motion sensing element to indicate that motion of an object has been detected.

7. A motion sensor as set forth in claim 6, wherein flashing of the alignment light or secondary indicator occurs upon detection of motion.

8. A motion sensor as set forth in claim 6, further comprising an audible alarm system for indicating motion detection.