Ceiling mount intrusion detector with PIR mirror with adjustable mount height
View Patent ↗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.
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.