[특허]Method and system for detecting the position of an edge of a web

Accuweb, Inc.

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Method and system for detecting the position of an edge of a web

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01N-021/86
미국특허분류(USC)	250/559.36; 073/601
출원번호	US-0406048 (2006-04-17)
등록번호	US-7372061 (2008-05-13)
발명자 / 주소	Buisker,Raymond A. Kalnajs,Andrew
출원인 / 주소	Accuweb, Inc.
대리인 / 주소	Brinks Hofer Gilson & Lione
인용정보	피인용 횟수 : 1 인용 특허 : 11

초록
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A method and system for determining the lateral position of an edge of a web are disclosed. The system includes a plurality of optical transmitters, a plurality of optical receivers, a plurality of ultrasonic transmitters, a plurality of ultrasonic receivers, and a controller. The controller is used to determine which type of transmitter and receiver should be used in conjunction with the specific web to be processed. The controller activates certain optical transmitters and determines the amount of optical occlusion that results from the web being between the optical transmitters and receivers. The controller also activates certain ultrasonic transmitters and determines the amount of sound occlusion that results from the web passing between the ultrasonic transmitters and receivers. The type of transmitter/receiver that results in the most occlusion can then be selected to determine the position of the edge of the web. Once selected, only one type of transmitter/receiver is preferably used at a given time to determine the position of the edge of the web, and position the web accordingly. A compensation beam can also be used to further enhance the accuracy of the determination of the web's position.

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We claim: 1. A system for use in detecting the edge of a web of moving material, the system comprising; an optical source operative to transmit light; an optical receiver positioned to receive light transmitted by the optical source and operative to generate a first signal; an ultrasonic source operative to transmit sound; an ultrasonic receiver positioned to receive sound transmitted by the ultrasonic source and operative to generate a second signal; and a controller coupled with the optical source, the optical receiver, the ultrasonic source, and the ultrasonic receiver, the controller being operative to activate the optical source and the ultrasonic source and receive the first and second signals, the controller being further operative to select the optical source and receiver or the ultrasonic source and receiver for use in detecting the edge of a web of moving material based upon the first and second signals; wherein the optical source and the optical receiver are spatially separated and the ultrasonic source and the ultrasonic receiver are spatially separated such that a portion of a web can pass between the optical source and the optical receiver and between the ultrasonic source and the ultrasonic receiver. 2. The system of claim 1, wherein the optical source comprises a light emitting diode. 3. The system of claim 1, wherein the optical source is operative to transmit light in the infrared light range. 4. The system of claim 1, wherein the optical source is operative to transmit light at variable intensities. 5. The system of claim 1, wherein the optical receiver comprises a phototransistor. 6. The system of claim 1, wherein the optical receiver comprises a photodiode. 7. The system of claim 1, wherein the ultrasonic transmitter comprises a sound conducting plate. 8. The system of claim 1, wherein the ultrasonic transmitter comprises a piezoelectric ceramic element. 9. The system of claim 1, wherein the ultrasonic receiver comprises a piezoelectric ceramic element. 10. The system of claim 1, further comprising a U-shaped housing having an upper arm and a lower arm, wherein the optical source is disposed in either the upper arm or the lower arm and optical receiver is disposed in the opposite arm and wherein the ultrasonic source is disposed in either the upper arm or the lower arm and ultrasonic receiver is disposed in the opposite arm. 11. The system of claim 1, further comprising a second optical source and a second optical receiver that are operative to generate a compensation light beam. 12. The system of claim 1, further comprising a second ultrasonic source and a second ultrasonic receiver that are operative to generate a compensation sound beam. 13. The system of claim 1, further comprising a web mover coupled with the controller. 14. A system for use in detecting the edge of a web of moving material, the system comprising; a plurality of optical sources that operative to transmit light; a plurality of optical receivers that are operative to receive light; a plurality of ultrasonic sources operative to transmit sound; a plurality of ultrasonic receivers operative to receive sound; a controller coupled with the plurality of optical sources, the plurality of optical receivers, the plurality of ultrasonic sources, and the plurality of ultrasonic receivers, the controller being operative to measure the amount of light received by one or more of the plurality of optical receivers, measure the amount of sound received by one or more of the plurality of ultrasonic receivers, and select the plurality of optical sources and receivers or the plurality of ultrasonic sources and receivers for use in detecting the edge of a web of moving material based upon the light and sound measurements. 15. The system of claim 14, wherein each of the plurality of optical sources comprises a light emitting diode. 16. The system of claim 14, wherein each of the plurality of optical sources is operative to transmit light in the infrared light range. 17. The system of claim 14, wherein each of the plurality of optical sources is operative to transmit light at variable intensities. 18. The system of claim 14, wherein each of the plurality of optical receivers comprises a phototransistor. 19. The system of claim 14, wherein each of the plurality of optical receivers comprises a photodiode. 20. The system of claim 14, wherein each of the plurality of ultrasonic transmitters comprises a sound conducting plate. 21. The system of claim 14, wherein each of the plurality of ultrasonic transmitters comprises a piezoelectric ceramic element. 22. The system of claim 14, wherein each of the plurality of ultrasonic receivers comprises a piezoelectric ceramic element. 23. The system of claim 14, wherein the plurality of optical sources are arranged in a staggered pattern. 24. The system of claim 14, wherein the plurality of optical sources are arranged in two substantially parallel rows. 25. The system of claim 14, wherein the plurality of optical receivers are arranged in a staggered pattern. 26. The system of claim 14, wherein the plurality of optical receivers are arranged in two substantially parallel rows. 27. The system of claim 14, wherein the plurality of ultrasonic sources are arranged in a staggered pattern. 28. The system of claim 14, wherein the plurality of ultrasonic sources are arranged in two substantially parallel rows. 29. The system of claim 14, wherein the plurality of ultrasonic receivers are arranged in a staggered pattern. 30. The system of claim 14, wherein the plurality of ultrasonic receivers are arranged in two substantially parallel rows. 31. The system of claim 14, wherein one of the plurality of optical sources is operative to generate a compensation beam of light. 32. The system of claim 14, wherein one of the plurality of ultrasonic sources is operative to generate a compensation beam of light. 33. The system of claim 14, wherein the controller is operative to sequentially activate the plurality of optical sources and optical receivers so that only a single optical source and a single optical receiver are active at a time. 34. The system of claim 14, wherein the controller is operative to sequentially activate the plurality of ultrasonic sources and ultrasonic receivers so that only a single ultrasonic source and a single ultrasonic receiver are active at a time. 35. The system of claim 14, further comprising a web mover coupled with the controller. 36. The system of claim 14, further comprising a U-shaped housing having an upper arm and a lower arm, wherein the plurality of optical sources are disposed in either the upper arm or the lower arm and plurality of optical receivers are disposed in the opposite arm and wherein the plurality of ultrasonic sources are disposed in either the upper arm or the lower arm and plurality of ultrasonic receivers are disposed in the opposite arm. 37. The system of claim 14, wherein the plurality of optical sources and the plurality of optical receivers are spatially separated and the plurality of ultrasonic sources and the plurality of ultrasonic receivers are spatially separated such that a portion of a web can pass between the plurality of optical sources and the plurality of optical receivers and between the plurality of ultrasonic sources and the plurality of ultrasonic receivers. 38. A method for detecting the edge of a web of moving material, the method comprising; (a) transmitting light using an optical source; (b) receiving light transmitted in (a) using an optical receiver; (c) determining the amount of light received in (b); (d) transmitting sound using an ultrasonic source; (e) receiving sound transmitted in (d); (f) determining the amount of sound received in (e); and (g) selecting the optical source and receiver or the ultrasonic source and receiver for use in detecting the edge of a web of moving material based upon the determinations made in (c) and (f). 39. The method of claim 38, further comprising the act of placing the web between the optical source and the optical receiver prior to (a). 40. The method of claim 38, further comprising the act of placing the web between the ultrasonic source and the ultrasonic receiver prior to (d). 41. The method of claim 38, wherein (a) comprises transmitting light using a light emitting diode. 42. The method of claim 38, wherein (b) comprises receiving light using a phototransistor. 43. The method of claim 38, wherein (b) comprises receiving light using a photodiode. 44. The method of claim 38, wherein (d) comprises transmitting sound using a piezoelectric ceramic element. 45. The method of claim 38, wherein (e) comprises receiving sound using a piezoelectric ceramic element. 46. The method of claim 38, further comprising the act of determining the position of the edge of the web using either the optical source and the optical receiver or the ultrasonic source and the ultrasonic receiver. 47. The method of claim 38, further comprising the act of generating a compensation light beam for use in determining the position of the edge of the web. 48. The method of claim 38, further comprising the act of generating a compensation sound beam for use in determining the position of the edge of the web.

이 특허에 인용된 특허 (11)

이 특허를 인용한 특허 피인용횟수: 1

Zwerger, Lars; Krauth, Wolfgang; Franz, Günter. Apparatus for detecting an edge of a material web. USP2016019238563.

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Method and system for detecting the position of an edge of a web

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Method and system for detecting the position of an edge of a web

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