JPH0350513B
PURPOSE:To enable to detect the malfunction of a rotary electric machine in an early period by discriminating the malfunction of the machine by the distance between the sampled value due to n-dimensional vector obtained by Fourier analysis from the detection signal and the reference value. CONSTITUT...
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| creator | TAMAOKI TETSUO |
| description | PURPOSE:To enable to detect the malfunction of a rotary electric machine in an early period by discriminating the malfunction of the machine by the distance between the sampled value due to n-dimensional vector obtained by Fourier analysis from the detection signal and the reference value. CONSTITUTION:After the detection signal of a rotary electric machine 1 is converted by a signal input unit 3 into a digital signal, and the signal is inputted to a data storage unit 4. This input data is analyzed by a Fourier analyzer 5, which generates a sampled vector of n-dimensional vector formed of power spectral density or coherence. A reference pattern correcting unit 7 outputs a reference vector in response to the rotating frequency of the sampled vector. A comparator 8 applies a signal to an alarm generator 10 when the distance between the reference vector and the sampled vector is larger than the threshold value. In this manner, the reliability of the detected result of the malfunction state can be improved. |
| format | Patent |
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CONSTITUTION:After the detection signal of a rotary electric machine 1 is converted by a signal input unit 3 into a digital signal, and the signal is inputted to a data storage unit 4. This input data is analyzed by a Fourier analyzer 5, which generates a sampled vector of n-dimensional vector formed of power spectral density or coherence. A reference pattern correcting unit 7 outputs a reference vector in response to the rotating frequency of the sampled vector. A comparator 8 applies a signal to an alarm generator 10 when the distance between the reference vector and the sampled vector is larger than the threshold value. In this manner, the reliability of the detected result of the malfunction state can be improved.</description><language>eng</language><subject>CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS ; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS ; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ; ELECTRICITY ; GENERATION ; MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES ; MEASURING ; NUCLEAR ENGINEERING ; NUCLEAR PHYSICS ; NUCLEAR POWER PLANT ; NUCLEAR REACTORS ; PHYSICS ; TESTING ; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES ; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR</subject><creationdate>1991</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=19910801&DB=EPODOC&CC=JP&NR=H0350513B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76516</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19910801&DB=EPODOC&CC=JP&NR=H0350513B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>TAMAOKI TETSUO</creatorcontrib><title>JPH0350513B</title><description>PURPOSE:To enable to detect the malfunction of a rotary electric machine in an early period by discriminating the malfunction of the machine by the distance between the sampled value due to n-dimensional vector obtained by Fourier analysis from the detection signal and the reference value. CONSTITUTION:After the detection signal of a rotary electric machine 1 is converted by a signal input unit 3 into a digital signal, and the signal is inputted to a data storage unit 4. This input data is analyzed by a Fourier analyzer 5, which generates a sampled vector of n-dimensional vector formed of power spectral density or coherence. A reference pattern correcting unit 7 outputs a reference vector in response to the rotating frequency of the sampled vector. A comparator 8 applies a signal to an alarm generator 10 when the distance between the reference vector and the sampled vector is larger than the threshold value. In this manner, the reliability of the detected result of the malfunction state can be improved.</description><subject>CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS</subject><subject>CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS</subject><subject>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</subject><subject>ELECTRICITY</subject><subject>GENERATION</subject><subject>MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES</subject><subject>MEASURING</subject><subject>NUCLEAR ENGINEERING</subject><subject>NUCLEAR PHYSICS</subject><subject>NUCLEAR POWER PLANT</subject><subject>NUCLEAR REACTORS</subject><subject>PHYSICS</subject><subject>TESTING</subject><subject>TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES</subject><subject>TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1991</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZOD2CvAwMDY1MDU0duJhYE1LzClO5YXS3AxKbq4hzh66qQX58anFBYnJqXmpJfFIOpyMjIlSBAB2CRwn</recordid><startdate>19910801</startdate><enddate>19910801</enddate><creator>TAMAOKI TETSUO</creator><scope>EVB</scope></search><sort><creationdate>19910801</creationdate><title>JPH0350513B</title><author>TAMAOKI TETSUO</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH0350513BB23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1991</creationdate><topic>CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS</topic><topic>CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS</topic><topic>CONVERSION OR DISTRIBUTION OF ELECTRIC POWER</topic><topic>ELECTRICITY</topic><topic>GENERATION</topic><topic>MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES</topic><topic>MEASURING</topic><topic>NUCLEAR ENGINEERING</topic><topic>NUCLEAR PHYSICS</topic><topic>NUCLEAR POWER PLANT</topic><topic>NUCLEAR REACTORS</topic><topic>PHYSICS</topic><topic>TESTING</topic><topic>TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES</topic><topic>TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR</topic><toplevel>online_resources</toplevel><creatorcontrib>TAMAOKI TETSUO</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>TAMAOKI TETSUO</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>JPH0350513B</title><date>1991-08-01</date><risdate>1991</risdate><abstract>PURPOSE:To enable to detect the malfunction of a rotary electric machine in an early period by discriminating the malfunction of the machine by the distance between the sampled value due to n-dimensional vector obtained by Fourier analysis from the detection signal and the reference value. CONSTITUTION:After the detection signal of a rotary electric machine 1 is converted by a signal input unit 3 into a digital signal, and the signal is inputted to a data storage unit 4. This input data is analyzed by a Fourier analyzer 5, which generates a sampled vector of n-dimensional vector formed of power spectral density or coherence. A reference pattern correcting unit 7 outputs a reference vector in response to the rotating frequency of the sampled vector. A comparator 8 applies a signal to an alarm generator 10 when the distance between the reference vector and the sampled vector is larger than the threshold value. In this manner, the reliability of the detected result of the malfunction state can be improved.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES MEASURING NUCLEAR ENGINEERING NUCLEAR PHYSICS NUCLEAR POWER PLANT NUCLEAR REACTORS PHYSICS TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR |
| title | JPH0350513B |
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