Method and device for monitoring the state of a marine diesel engine
By collecting and processing triaxial vibration velocity, DC gravity component and scavenging pressure, and combining the ship's heel angle and life cycle weighting coefficient, a deterioration divergence index is generated, which solves the problems of high false alarm rate and insufficient adaptability in the existing diesel engine condition monitoring technology, and realizes high-precision condition monitoring and fault diagnosis.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CCCC SHANGHAI THIRD HARBOR SCI RES INST CO LTD
- Filing Date
- 2026-06-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing marine diesel engine condition monitoring technologies struggle to accurately distinguish between external disturbances and internal mechanical conditions in complex sea conditions, resulting in a high false alarm rate, ineffective monitoring of mechanical fatigue life, and a lack of adaptive sensitivity.
By real-time acquisition of triaxial vibration velocity components, triaxial DC gravity components, and scavenging pressure, the combined triaxial vibration velocity and ship heel angle are calculated. Combined with preset parameters, normalization and decoupling calculations are performed to generate a degradation divergence index. Using life cycle weighting coefficients and interquartile range to construct a scanning vernier, the health status of the diesel engine is accurately determined.
It achieves reduced false alarm rate and improved fault diagnosis accuracy under complex working conditions, ensures high sensitivity monitoring throughout the entire life cycle, and can accurately reflect the degradation state of mechanical structures.
Smart Images
Figure CN122407359A_ABST