| 摘要 |
PURPOSE:To detect the deteriorated condition of rotary mechanism and evaluate by measuring and storing the frequency characteristic of rotary vibration at the initial stage of a rotary anode type X-ray tube then comparing with the vibration frequency characteristic measured during usage. CONSTITUTION:A vibration sensor 32 is fixed through a plastic vibration transmitting block 31 to a hard plastic holder 23 for securing a rotary anode type X-ray tube 11 into a bonnet 21. The output signal is processed through an evaluation system including a frequency component meter 34, a data memory 35, a data comparison/display 36, etc.. Upon start of usage, the vibration frequency component for every time from the start of rotation to predetermined maximum rotation is measured and stored then compared with the vibration frequency component characteristic measured after usage for predetermined interval thus to evaluate the deterioration of the rotary mechanism. Consequently, prediction of the cause of deterioration or the service life can be performed with high probability. |
