Ceiling mount intrusion detector with PIR mirror with adjustable mount height

Patent metadata

Field	Value
Publication number	US-10605666-B2
Application number	US-201715856436-A
Country	US
Kind code	B2
Filing date	Dec 28, 2017
Priority date	Dec 28, 2017
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

A ceiling mount intrusion detector is provided that includes a sensor, a mirror for directing collected energy towards the sensor, and a mechanism for adjusting the mirror to account for a plurality of different mount heights. In some embodiments, the mechanism can adjust the mirror by moving the mirror up or down without rotating the mirror.

First claim

What is claimed is:

1. A ceiling mount intrusion detector comprising:
a sensor wherein the sensor includes a single dual element pyroelectric sensor;
a mirror assembly integrally formed by a plurality of mirrors for directing collected energy towards the sensor without a Fresnel lens wherein the plurality of mirrors include a plurality of parabolic mirror pieces that form a mirrored ring; and
a processor that, responsive to receiving user input setting a mount height, automatically causes a mechanical ring to rotate to drive the mirror assembly up or down relative to the sensor to adjust a reflection angle of the mirror assembly without rotating the mirror assembly.

2. The ceiling mount intrusion detector of claim 1 wherein the sensor includes a PIR sensor.

3. The ceiling mount intrusion detector of claim 1 wherein the plurality of mirrors include a plurality of tiers.

4. The ceiling mount intrusion detector of claim 1 wherein the processor automatically moves the mirror assembly towards the sensor to account for a decrease in the mount height.

5. The ceiling mount intrusion detector of claim 1 wherein the processor automatically moves the mirror assembly away from the sensor to account for an increase in the mount height.

6. The ceiling mount intrusion detector of claim 1 further comprising a bar that includes a scale of a plurality of different mount heights.

7. A method comprising:
providing a sensor in a ceiling mount intrusion detector wherein the sensor includes a single dual element pyroelectric sensor;
providing a mirror assembly integrally formed by a plurality of mirrors in the ceiling mount intrusion detector for directing energy collected by the ceiling mount intrusion detector towards the sensor without a Fresnel lens wherein the plurality of mirrors include a plurality of parabolic mirror pieces that form a mirrored ring or a plurality of tiers;
receiving user input setting a mount height of the ceiling mount intrusion detector; and
responsive to receiving the user input, a processor automatically causing a mechanical ring to rotate to drive the mirror assembly up or down relative to the sensor to adjust a reflection angle of the mirror assembly without rotating the mirror assembly.

8. The method of claim 7 further comprising
the processor automatically moving the mirror assembly towards the sensor to account for a decrease in the mount height.

9. The method of claim 7 further comprising
the processor automatically moving the mirror assembly away from the sensor to account for an increase in the mount height.

10. The method of claim 7 further comprising:
providing a bar that includes a scale of a plurality of different mount heights.

Assignees

• Honeywell Int Inc
• Ademco Inc

Inventors

• Xu Haidong
• Zhu Dongliang

Classifications

• G01V8/10

  Detecting, e.g. by using light barriers (by reflection from the object G01S17/00) · CPC title

• G08B13/19

  using infrared-radiation detection systems {(G08B13/194 takes precedence)} · CPC title

• G08B13/191

  using pyroelectric sensor means · CPC title

• G01J5/041

  Mountings in enclosures or in a particular environment · CPC title

• G08B13/189 Primary

  using passive radiation detection systems · CPC title