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 |
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).
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