| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for detecting abnormality in a material moving system generated while a material is moved continuously in the system in which a plurality of motor-driven devices are installed. SOLUTION: Two A and B are selected out of the motor-driven devices installed in this system, whereto the power is fed from the same power supply, a one A in which the current consumption changes large relatively in compliance with the load and another B in which the current consumption changes small relatively, and when the material is moving normally with the specified load amount inside the system, the current consumption of each device is measured, and the correlational formula between the two current consumptions is determined. When detecting abnormality, the current consumptions of the devices A and B are measured, and the difference of the obtained measurement from the current consumption calculated by applying the measurement to the correlational formula described above, and existence of abnormality is judged if the difference lies within the predetermined allowable range or not. COPYRIGHT: (C)2004,JPO
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