ABNORMALITY DETERMINING DEVICE AND ABNORMALITY DETERMINING METHOD
An abnormality determining device includes: a current value detecting unit configured to detect a current value which is a value of a drive current of a motor; a variance ratio calculating unit configured to group time-series current values detected in time series by the current value detecting unit...
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| creator | KOKUME Masanori SUZUKI Tomohiro |
| description | An abnormality determining device includes: a current value detecting unit configured to detect a current value which is a value of a drive current of a motor; a variance ratio calculating unit configured to group time-series current values detected in time series by the current value detecting unit at a predetermined time interval, to calculate a variance value of the current values of each group, and to calculate a variance ratio of each group by dividing the variance value of the current values of the corresponding group by a variance value of a reference current value of the motor when a reduction gear is normal; and a determination unit configured to determine that the reduction gear is abnormal when the variance ratios calculated by the variance ratio calculating unit for all the groups are equal to or greater than a threshold value. |
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a variance ratio calculating unit configured to group time-series current values detected in time series by the current value detecting unit at a predetermined time interval, to calculate a variance value of the current values of each group, and to calculate a variance ratio of each group by dividing the variance value of the current values of the corresponding group by a variance value of a reference current value of the motor when a reduction gear is normal; and a determination unit configured to determine that the reduction gear is abnormal when the variance ratios calculated by the variance ratio calculating unit for all the groups are equal to or greater than a threshold value.</description><language>eng</language><subject>CHAMBERS PROVIDED WITH MANIPULATION DEVICES ; CONTROL OR REGULATING SYSTEMS IN GENERAL ; CONTROLLING ; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS ; HAND TOOLS ; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT ; MANIPULATORS ; MEASURING ; MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK ; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS ; PERFORMING OPERATIONS ; PHYSICS ; PORTABLE POWER-DRIVEN TOOLS ; REGULATING ; TESTING ; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES ; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR ; TRANSPORTING</subject><creationdate>2017</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20171019&DB=EPODOC&CC=US&NR=2017297199A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76419</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20171019&DB=EPODOC&CC=US&NR=2017297199A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>KOKUME Masanori</creatorcontrib><creatorcontrib>SUZUKI Tomohiro</creatorcontrib><title>ABNORMALITY DETERMINING DEVICE AND ABNORMALITY DETERMINING METHOD</title><description>An abnormality determining device includes: a current value detecting unit configured to detect a current value which is a value of a drive current of a motor; a variance ratio calculating unit configured to group time-series current values detected in time series by the current value detecting unit at a predetermined time interval, to calculate a variance value of the current values of each group, and to calculate a variance ratio of each group by dividing the variance value of the current values of the corresponding group by a variance value of a reference current value of the motor when a reduction gear is normal; and a determination unit configured to determine that the reduction gear is abnormal when the variance ratios calculated by the variance ratio calculating unit for all the groups are equal to or greater than a threshold value.</description><subject>CHAMBERS PROVIDED WITH MANIPULATION DEVICES</subject><subject>CONTROL OR REGULATING SYSTEMS IN GENERAL</subject><subject>CONTROLLING</subject><subject>FUNCTIONAL ELEMENTS OF SUCH SYSTEMS</subject><subject>HAND TOOLS</subject><subject>INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT</subject><subject>MANIPULATORS</subject><subject>MEASURING</subject><subject>MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK</subject><subject>MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS</subject><subject>PERFORMING OPERATIONS</subject><subject>PHYSICS</subject><subject>PORTABLE POWER-DRIVEN TOOLS</subject><subject>REGULATING</subject><subject>TESTING</subject><subject>TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES</subject><subject>TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR</subject><subject>TRANSPORTING</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2017</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHB0dPLzD_J19PEMiVRwcQ1xDfL19PP0cweywzydXRUc_VwUcCnxdQ3x8HfhYWBNS8wpTuWF0twMym6uIc4euqkF-fGpxQWJyal5qSXxocFGBobmRpbmhpaWjobGxKkCAJ6zLC4</recordid><startdate>20171019</startdate><enddate>20171019</enddate><creator>KOKUME Masanori</creator><creator>SUZUKI Tomohiro</creator><scope>EVB</scope></search><sort><creationdate>20171019</creationdate><title>ABNORMALITY DETERMINING DEVICE AND ABNORMALITY DETERMINING METHOD</title><author>KOKUME Masanori ; 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a variance ratio calculating unit configured to group time-series current values detected in time series by the current value detecting unit at a predetermined time interval, to calculate a variance value of the current values of each group, and to calculate a variance ratio of each group by dividing the variance value of the current values of the corresponding group by a variance value of a reference current value of the motor when a reduction gear is normal; and a determination unit configured to determine that the reduction gear is abnormal when the variance ratios calculated by the variance ratio calculating unit for all the groups are equal to or greater than a threshold value.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CHAMBERS PROVIDED WITH MANIPULATION DEVICES CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING FUNCTIONAL ELEMENTS OF SUCH SYSTEMS HAND TOOLS INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT MANIPULATORS MEASURING MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PERFORMING OPERATIONS PHYSICS PORTABLE POWER-DRIVEN TOOLS REGULATING TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR TRANSPORTING |
| title | ABNORMALITY DETERMINING DEVICE AND ABNORMALITY DETERMINING METHOD |
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