Measurement and diagnostic of engine belt physical condition from acoustic signals

This paper presents an investigation into the diagnosis of transmission belt condition through acoustic monitoring. A relevant belt model and laser interferometry measurements are used to guide the design and analysis of the acoustic monitoring system. The fault under scrutiny is the development of a loss of tension in the belt which may occur due to degradation of belt material. Results show that it is possible to diagnose this kind of fault using acoustic diagnostic techniques. Analysis of acoustic signals reveals changes in the natural frequencies of the belt which are matched by results for laser interferometry.