US 11,738,223 B2
Fire suppression system
Mikolaj Jakub Sadek, Gdańsk (PL); Nazar Krutskevych, Gdańsk (PL); and Wojciech Dominik Zimny, Gdańsk (PL)
Assigned to MARIOFF CORPORATION OY, Vantaa (FI)
Filed by Marioff Corporation Oy, Vantaa (FI)
Filed on Sep. 18, 2020, as Appl. No. 17/25,412.
Claims priority of application No. 19198720 (EP), filed on Sep. 20, 2019.
Prior Publication US 2021/0086010 A1, Mar. 25, 2021
Int. Cl. G01L 9/00 (2006.01); A62C 37/50 (2006.01); A62C 37/14 (2006.01); A62C 37/44 (2006.01); A62C 37/48 (2006.01)
CPC A62C 37/44 (2013.01) [A62C 37/48 (2013.01); A62C 37/50 (2013.01); G01L 9/0095 (2013.01); A62C 37/14 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A sprinkler device, comprising:
a sprinkler bulb (100) comprising a sealed frangible housing (110), and a passive circuit device (120) within the housing (110), wherein the passive circuit device (120) comprises a wireless module (160); and
a base station (200) configured to detect pressure changes inside the sprinkler bulb (110) via the wireless module (160);
wherein the wireless module (160) comprises an inductor (170) and a capacitor (150) having a capacitance sensitive to pressure changes within the housing (110) of the sprinkler bulb (100), and wherein the base station (200) is configured to monitor changes in a resonant frequency of the wireless module (160) caused by changes in the capacitance of the capacitor (150) to thereby detect pressure changes inside the housing (110) of the sprinkler bulb (100).