Title:
DEVICE FOR DETECTING ABNORMALITY OF POWER TRANSMISSION MEANS
Document Type and Number:
Japanese Patent JP3910052
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a device for detecting abnormality of a power transmission means which can detect abnormality occurred in the power transmission means quickly and accurately.
SOLUTION: Pulse width counters 12 and 14 count clock pulses from a clock pulse generator 11 in one cycle of the continuous pulses from a first pulse generating means 25 and a second pulse generating means 26 which generate pulses, according to the rotation of pulleys 21 and 22. The clock pulse has a frequency which is larger enough than the pulse frequency from the first pulse generator at the time when a servo motor rotates at the highest speed. The number of counts vs. speed converters 13 and 15 get a rotational speed of each pulley from the number of counts of a pulse width counter. A comparator 16 judges the abnormality of a power transmission belt 24 by comparing the rotational speeds of the pulleys obtained by the number of counts vs. speed converters with each other.
Inventors:
Yushi Onishi
Application Number:
JP2001370888A
Publication Date:
April 25, 2007
Filing Date:
December 05, 2001
Export Citation:
Assignee:
Sumitomo Heavy Industries Ltd.
International Classes:
B29C45/66; B29C45/84; H02P29/00; (IPC1-7): H02P5/00; B29C45/66; B29C45/84
Domestic Patent References:
| JP11190405A | ||||
| JP10249787A | ||||
| JP61173162A |
Attorney, Agent or Firm:
Kenho Ikeda
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