[특허]Phase-locked web position signal using web fiducials

Phase-locked web position signal using web fiducials 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B65H-023/04 G05B-019/404 G01C-015/00 G01R-025/00
출원번호	US-0469662 (2014-08-27)
등록번호	US-9296583 (2016-03-29)
발명자 / 주소	Theis, Daniel T. Carlson, Daniel H. Nelson, Brian K.
출원인 / 주소	3M Innovative Properties Company
대리인 / 주소	Dong, Yufeng
인용정보	피인용 횟수 : 0 인용 특허 : 53

초록 ▼

Approaches for enhancing web position determination involve phase locking a web movement encoder signal to a sensed web fiducial signal. Fiducials disposed along a longitudinal axis of a substrate are sensed and corresponding sensor signals are generated. An estimated web position is provided by one or more encoder signals. The phase difference between the sensor signals and the encoder signals is calculated and the web position error is determined based on the phase difference. The web position error signal can be fed back to adjust the encoder signals which improves the accuracy of the web position determination.

대표청구항 ▼

1. A system, comprising: a sensor module configured to sense one or more fiducials disposed along a longitudinal axis of a substrate and to generate one or more continuous, periodic fiducial sensor signals based on the fiducials;a signal generator configured to generate one or more continuous, periodic movement signals based on movement of the substrate, the movement signals representing an estimated position of the substrate; anda phase detector configured to determine a phase difference between the fiducial sensor signals and the movement signals and to generate an error signal based on the phase difference, the error signal representing a substrate position error of the estimated position of the substrate. 2. The system of claim 1, wherein: the substrate comprises an elongated, flexible web disposed on a rotating drum; andthe signal generator comprises an encoder configured to detect rotation of the drum. 3. The system of claim 1, wherein the one or more fiducials comprise two substantially continuous, periodic fiducials that are out of phase with each other. 4. The system of claim 1, wherein the fiducials comprise sine and cosine fiducials. 5. The system of claim 1, further comprising feedback circuitry configured to adjust the movement signals based on the error signal so as to correct the substrate position error. 6. The system of claim 5, further comprising: a fabrication system configured to fabricate articles on the substrate; and control circuitry configured to control the fabrication system using the adjusted movement signals. 7. The system of claim 5, further comprising substrate position circuitry configured to determine substrate position along the longitudinal axis based on the adjusted movement signals. 8. The system of claim 7, wherein: the one or more fiducials comprise one or more substantially continuous, periodic fiducials;the sensor module is configured to detect zero crossings of the periodic fiducials; andthe substrate position circuitry is configured to make absolute position determinations based on the detected zero crossings. 9. The system of claim 7, wherein: the sensor module is configured to detect a series of discrete fiducials arranged along the longitudinal axis of the substrate; andthe substrate position circuitry is configured to initiate identification of the zero crossings based on detection of the discrete fiducial marks. 10. The system of claim 7, wherein: the sensor module is further configured to sense a reference fiducial disposed along the longitudinal axis of the substrate; andthe substrate position circuitry is configured to determine a substrate position along a lateral axis of the substrate based on a distance between the reference fiducial and the one or more fiducials. 11. A system, comprising: a sensor module configured to sense one or more fiducials disposed along a longitudinal axis of a substrate and to generate one or more continuous, periodic sensor signals based on the fiducials;a signal generator configured to generate one or more continuous, periodic signals based on movement of the substrate;a phase detector configured to determine a phase difference between the sensor signals and the movement signals and to generate an error signal based on the phase difference;feedback circuitry configured to adjust the movement signals based on the error signal; and substrate position circuitry configured to determine substrate position along the longitudinal axis based on the adjusted movement sensor signals, wherein: the sensor module is further configured to sense a reference fiducial disposed along the longitudinal axis of the substrate; and the substrate position circuitry is configured to determine an amplitude of the one or more fiducials based on the reference fiducial.

이 특허에 인용된 특허 (53)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Phase-locked web position signal using web fiducials 원문보기

초록 ▼

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연구과제 타임라인

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연합인증

Phase-locked web position signal using web fiducials 원문보기

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연구과제 타임라인

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