Patent ID: 11920995
Assignee: KONGSBERG MARITIME AS
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
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).