US 11,920,995 B2
Drive shaft monitoring system
Stefan Blom Hanssen, Trondheim (NO); and Morten Fagerli, Ranheim (NO)
Assigned to Kongsberg Maritime AS, Horten (NO)
Appl. No. 17/618,928
Filed by Kongsberg Maritime AS, Horten (NO)
PCT Filed Jun. 25, 2020, PCT No. PCT/NO2020/050179
§ 371(c)(1), (2) Date Dec. 14, 2021,
PCT Pub. No. WO2020/263104, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 20190818 (NO), filed on Jun. 28, 2019.
Prior Publication US 2022/0244116 A1, Aug. 4, 2022
Int. Cl. G01L 3/08 (2006.01); G01L 27/00 (2006.01); G01M 15/05 (2006.01)
CPC G01L 3/08 (2013.01) [G01L 27/002 (2013.01); G01M 15/05 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A drive shaft monitoring system (20) for a drive shaft having an exterior surface and extending in a longitudinal direction, comprising:
a first coded disc (21a) arranged to the exterior surface of the drive shaft (11) at a first position;
a second coded disc (21b) arranged to the exterior surface of the drive shaft (11) at a second position, the second position being at a predetermined distance from the first coded disc (21a) in the longitudinal direction of the drive shaft (11), the first coded disc (21a) and second coded disc (21b) provided with multiple slots or recesses (22) allowing light to pass through and having a comparable configuration and being evenly distributed in a circumferential direction thereof; and
at least two independent light sensor assemblies (30a-30c) arranged in connection with the slots or recesses (22) of the first coded disc (21a) and the second coded disc (21b).