GB/T 41894.2-2022

This standard specifies the optical reflection method for determining the shaft power of ship propulsion systems by measuring shaft distortion. It is applied in the marine industry for onboard performance testing, commissioning, and condition monitoring of propulsion shafts on vessels such as cargo ships, tankers, and offshore platforms. The method provides a non-contact measurement technique suitable for both new installations and retrofit applications where accurate power assessment is required without direct torque sensors.