US 12,008,887 B2
Method of fire detector cover detection and corresponding fire detection apparatus
Pawel Raasz, Gdańsk (PL); and Piotr Wolnowski, Gdańsk (PL)
Assigned to CARRIER CORPORATION, Palm Beach Gardens, FL (US)
Filed by Carrier Corporation, Palm Beach Gardens, FL (US)
Filed on Mar. 4, 2022, as Appl. No. 17/686,954.
Claims priority of application No. 21161230 (EP), filed on Mar. 8, 2021.
Prior Publication US 2022/0284800 A1, Sep. 8, 2022
Int. Cl. G08B 29/02 (2006.01); G01S 17/04 (2020.01); G01V 1/00 (2006.01)
CPC G08B 29/02 (2013.01) [G01S 17/04 (2020.01); G01V 1/001 (2013.01)] 14 Claims
OG exemplary drawing
 
1. 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.