| 摘要 |
PURPOSE:To enable a high-reliability measurement by simultaneously measuring two systems both of a fusing part and of the other part, while rotating a rotor. CONSTITUTION:In a measuring device, two laser displacement gages are used as sensors 18, 19; and in the commutator 2 of a rotor 1 that is turning at a given speed, both a copper plate 3 (not shown) part and a fusing hole 4 (not shown) part are measured, and after the output signals of the two systems have been subjected to an A/D conversion via a signal processing device 31, the depth dimensions of respective holes are calculated and compared by a data processing device 32 for judging whether they are acceptable or not and for detecting the time of replacement of electrodes, and they are output and shown on a display 33. In this case, in the measurement of fusing depth, making the threshold of a specified design value, both the judgment whether or not the connection of a rotor coil is acceptable and the time of replacement of fusing electrodes that wear and change with the passage of time can be automatically detected. |
