Rotary position sensor
A rotor disk or color wheel received on a shaft to be sensed has an annular band of dual color (red/green) filter material having opposite circumferential gradient. A printed circuit board on one axial side of the rotor disk has the dual color LED, emitting light to a reflector on the opposite axial...
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| creator | BRIGGS, ROGER JAMES CORBIER, JEAN-PAUL RYCZEK, LAWRENCE JOSEPH |
| description | A rotor disk or color wheel received on a shaft to be sensed has an annular band of dual color (red/green) filter material having opposite circumferential gradient. A printed circuit board on one axial side of the rotor disk has the dual color LED, emitting light to a reflector on the opposite axial side of the rotor disk. Some reflected light from the LED passes through the filter which transmits, according to the amount of single color filter material present at the particular rotor station to a photodetector on the circuit board. Other rays of the emitted light are reflected directly to a second detector for ambient compensation. The amount of light transmitted by the filter causes the detector current to vary the charge rate of a capacitor charged to a reference level, and when reached the LED is switched to the other of the dual color emission. The time required to charge the capacitor to the reference level determines the fraction of the duty cycle of the output signal which may be correlated with known data on the color gradient to determine the rotor angular position. A second color wheel is indexed or geared up or down as an integrator for counting the number of full revolutions of the shaft color wheel. |
| format | Patent |
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A printed circuit board on one axial side of the rotor disk has the dual color LED, emitting light to a reflector on the opposite axial side of the rotor disk. Some reflected light from the LED passes through the filter which transmits, according to the amount of single color filter material present at the particular rotor station to a photodetector on the circuit board. Other rays of the emitted light are reflected directly to a second detector for ambient compensation. The amount of light transmitted by the filter causes the detector current to vary the charge rate of a capacitor charged to a reference level, and when reached the LED is switched to the other of the dual color emission. The time required to charge the capacitor to the reference level determines the fraction of the duty cycle of the output signal which may be correlated with known data on the color gradient to determine the rotor angular position. A second color wheel is indexed or geared up or down as an integrator for counting the number of full revolutions of the shaft color wheel.</description><edition>7</edition><language>eng ; fre ; ger</language><subject>ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS ; COLORIMETRY ; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS ; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT ; MEASURING ; MEASURING ANGLES ; MEASURING AREAS ; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS ; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS ; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE ; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR ; MOTOR VEHICLES ; PERFORMING OPERATIONS ; PHYSICS ; RADIATION PYROMETRY ; TARIFF METERING APPARATUS ; TESTING ; TRAILERS ; TRANSPORTING</subject><creationdate>2000</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=20000503&DB=EPODOC&CC=EP&NR=0997707A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76318</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20000503&DB=EPODOC&CC=EP&NR=0997707A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>BRIGGS, ROGER JAMES</creatorcontrib><creatorcontrib>CORBIER, JEAN-PAUL</creatorcontrib><creatorcontrib>RYCZEK, LAWRENCE JOSEPH</creatorcontrib><title>Rotary position sensor</title><description>A rotor disk or color wheel received on a shaft to be sensed has an annular band of dual color (red/green) filter material having opposite circumferential gradient. A printed circuit board on one axial side of the rotor disk has the dual color LED, emitting light to a reflector on the opposite axial side of the rotor disk. Some reflected light from the LED passes through the filter which transmits, according to the amount of single color filter material present at the particular rotor station to a photodetector on the circuit board. Other rays of the emitted light are reflected directly to a second detector for ambient compensation. The amount of light transmitted by the filter causes the detector current to vary the charge rate of a capacitor charged to a reference level, and when reached the LED is switched to the other of the dual color emission. The time required to charge the capacitor to the reference level determines the fraction of the duty cycle of the output signal which may be correlated with known data on the color gradient to determine the rotor angular position. A second color wheel is indexed or geared up or down as an integrator for counting the number of full revolutions of the shaft color wheel.</description><subject>ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS</subject><subject>COLORIMETRY</subject><subject>LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS</subject><subject>MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT</subject><subject>MEASURING</subject><subject>MEASURING ANGLES</subject><subject>MEASURING AREAS</subject><subject>MEASURING IRREGULARITIES OF SURFACES OR CONTOURS</subject><subject>MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS</subject><subject>MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE</subject><subject>MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR</subject><subject>MOTOR VEHICLES</subject><subject>PERFORMING OPERATIONS</subject><subject>PHYSICS</subject><subject>RADIATION PYROMETRY</subject><subject>TARIFF METERING APPARATUS</subject><subject>TESTING</subject><subject>TRAILERS</subject><subject>TRANSPORTING</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2000</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBALyi9JLKpUKMgvzizJzM9TKE7NK84v4mFgTUvMKU7lhdLcDApuriHOHrqpBfnxqcUFicmpeakl8a4BBpaW5uYG5o6GxkQoAQB_uSGD</recordid><startdate>20000503</startdate><enddate>20000503</enddate><creator>BRIGGS, ROGER JAMES</creator><creator>CORBIER, JEAN-PAUL</creator><creator>RYCZEK, LAWRENCE JOSEPH</creator><scope>EVB</scope></search><sort><creationdate>20000503</creationdate><title>Rotary position sensor</title><author>BRIGGS, ROGER JAMES ; CORBIER, JEAN-PAUL ; RYCZEK, LAWRENCE JOSEPH</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP0997707A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2000</creationdate><topic>ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS</topic><topic>COLORIMETRY</topic><topic>LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS</topic><topic>MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT</topic><topic>MEASURING</topic><topic>MEASURING ANGLES</topic><topic>MEASURING AREAS</topic><topic>MEASURING IRREGULARITIES OF SURFACES OR CONTOURS</topic><topic>MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS</topic><topic>MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE</topic><topic>MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR</topic><topic>MOTOR VEHICLES</topic><topic>PERFORMING OPERATIONS</topic><topic>PHYSICS</topic><topic>RADIATION PYROMETRY</topic><topic>TARIFF METERING APPARATUS</topic><topic>TESTING</topic><topic>TRAILERS</topic><topic>TRANSPORTING</topic><toplevel>online_resources</toplevel><creatorcontrib>BRIGGS, ROGER JAMES</creatorcontrib><creatorcontrib>CORBIER, JEAN-PAUL</creatorcontrib><creatorcontrib>RYCZEK, LAWRENCE JOSEPH</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>BRIGGS, ROGER JAMES</au><au>CORBIER, JEAN-PAUL</au><au>RYCZEK, LAWRENCE JOSEPH</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Rotary position sensor</title><date>2000-05-03</date><risdate>2000</risdate><abstract>A rotor disk or color wheel received on a shaft to be sensed has an annular band of dual color (red/green) filter material having opposite circumferential gradient. A printed circuit board on one axial side of the rotor disk has the dual color LED, emitting light to a reflector on the opposite axial side of the rotor disk. Some reflected light from the LED passes through the filter which transmits, according to the amount of single color filter material present at the particular rotor station to a photodetector on the circuit board. Other rays of the emitted light are reflected directly to a second detector for ambient compensation. The amount of light transmitted by the filter causes the detector current to vary the charge rate of a capacitor charged to a reference level, and when reached the LED is switched to the other of the dual color emission. The time required to charge the capacitor to the reference level determines the fraction of the duty cycle of the output signal which may be correlated with known data on the color gradient to determine the rotor angular position. A second color wheel is indexed or geared up or down as an integrator for counting the number of full revolutions of the shaft color wheel.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| language | eng ; fre ; ger |
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| subjects | ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS COLORIMETRY LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR MOTOR VEHICLES PERFORMING OPERATIONS PHYSICS RADIATION PYROMETRY TARIFF METERING APPARATUS TESTING TRAILERS TRANSPORTING |
| title | Rotary position sensor |
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