The control device for large bulb unit bearing oil system is ba sed on the programmable logic controller and programmable operator interface.

In this paper, an oil film thickness VXI measuring system of the thrust bearing test has been applied to set up a new kind of optical fiber reflective sensor mod el.

Oil fluid analysis technic acquires remarkable effect and obtains a lot of application in mechanical equipment's state monitoring such as engine, gear transmission, bearing system, hydraumatic system.