Appliance of mechanical energy converting elements to condition monitoring

Abstract

The paper presents a conversion model of the mechanical energy into the electrical one and shows that autonomic diagnostic devices can be developed on that basis. Built-in inspection uses these devices working on the conversion of the mechanical energy of vibration, applying for this reason piezoelectric matrices connected with the mechanical system, which are investigated theoretically and experimentally. It is shown that converters made of piezoelectric ceramics or film can work reliably enough by being placed directly in the objects to be inspected. Relative precision and abilities of the energy conversion for monitoring and diagnostic problem can be evaluated by simulating the dynamics of a general model according to the technical state of a mechanical system. It is suggested a concrete solution for the technical state monitoring and cracks diagnostics of constructive elements in different mechanical systems. Influence factors, affecting the uncertainty of measurement results were investigated.