Method of fire detector cover detection and corresponding fire detection apparatus
AssigneeCarrier Corporation
InventorsPawel Raasz, Piotr Wolnowski
Life of this patent
Estimating the term…
Abstract
A fire detection apparatus includes a fire detector (1) including an integrated sounding device (5) that is configured to emit a sound (7) from the fire detector (1) and that is further configured to detect reverberation of the emitted sound resulting from a cover (9) placed over the fire detector (1). The detected reverberation can be used to determine that the fire detector (1) has been covered.
Claims14
A fire detection apparatus comprising:
- a fire detector (1, 10) comprising an integrated sounding device (5) that is configured to emit a sound (7) from the fire detector (1, 10) and that is further configured to detect reverberation of the emitted sound resulting from a cover (9) placed over the fire detector (1,10);
- wherein the fire detector (10) comprises a light emitter (14) and a light detector (12), wherein the light emitter (14) is configured to emit a light from the fire detector (10) and wherein the light detector (12) is configured to detect the emitted light after having been reflected back to the fire detector (10) by a cover (9) placed over the fire detector (10);
- wherein the sounding device (5) detects a change in acoustic pressure in order to detect the reverberation.
A method of detecting whether a fire detector (1, 10) has been covered, the fire detector (1, 10) comprising an integral sounding device (5), the method comprising:
- emitting a sound (7) using the sounding device (5);
- and
- detecting, with the sounding device (5), for reverberation of the emitted sound resulting from a cover (9) placed over the fire detector (1, 10);
- wherein the fire detector (10) further comprises a light emitter (14) and a light detector (12), and wherein the method comprises:
- emitting a light (16) from the fire detector (1, 10) using the light emitter (14);
- and
- detecting with the light detector (12) for the light having been reflected back to the fire detector (10) by a cover (9) placed over the fire detector (10);
- wherein the sounding device (5) detects a change in acoustic pressure in order to detect the reverberation.
A method of detecting whether a fire detector (1, 10) of a fire detection apparatus has been covered, the fire detector (1, 10) comprising a sounding device (5), a sound detector, a light emitter (14) and a light detector (12), the method comprising:
- emitting a sound (7) with the sounding device (5);
- emitting a light with the light emitter (14);
- detecting, with the sound detector, for reverberation of the emitted sound resulting from a cover (9) placed over the fire detector (1, 10);
- and detecting with the light detector (12) for the light having been reflected back to the fire detector (1, 10) by a cover (9) placed over the fire detector (1, 10);
- wherein the sound detector detects a change in acoustic pressure in order to detect the reverberation.
A fire detection apparatus comprising:
- a fire detector (1, 10) comprising a sounding device (5) that is configured to emit a sound (7) from the fire detector (1, 10), a sound detector configured to detect reverberation of the emitted sound resulting from a cover (9) placed over the fire detector (1,10), a light emitter (14) and a light detector (12), wherein the light emitter (14) is configured to emit a light from the fire detector (10) and wherein the light detector (12) is configured to detect the emitted light after having been reflected back to the fire detector (10) by a cover (9) placed over the fire detector (10);
- wherein the sound detector detects a change in acoustic pressure in order to detect the reverberation.
Dependencies are inferred from the claim text.