摘要:
Die Erfindung betrifft ein Verfahren zur Steuerung einer Maschine zur Herstellung einer Faserstoffbahn, umfassend eine Regelgröße, zumindest zwei Stellgrößen, zumindest eine weitere Größe, sowie ein Kostenfunktional, wobei die zumindest zwei Stellgrößen so eingestellt werden, dass das Kostenfunktional optimiert wird, während gleichzeitig die Regelgröße innerhalb eines vorgegebenen Zielintervalles verbleibt. Erfindungsgemäß ist vorgesehen, dass sowohl die Regelgröße als auch das Kostenfunktional mittels eines gemeinsamen Modells aus den zumindest zwei Stellgrößen und der zumindest einen weiteren Größe berechnet werden.
摘要:
A method includes receiving (406) distance measurements from at least one scanning head (304, 304a, 304b) that moves back and forth across at least one surface of a web (108, 206, 302) of material on a frame (314-318). The distance measurements identify measured distances to the web. The method also includes controlling (408) one or more actuators (314-316) in order to move at least a portion of the frame to alter a position of the at least one scanning head relative to the web. The one or more actuators could be controlled so that the at least one scanning head maintains a substantially fixed offset from the web as the at least one scanning head moves back and forth. The one or more actuators could also be controlled so that the web maintains a substantially fixed position between multiple scanning heads (304a- 304b) as the scanning heads move back and forth.
摘要:
A gap and displacement magnetic sensor system for scanner heads in paper machines or other systems includes a multiple-sensor assembly (414b). The multiple-sensor assembly includes multiple magnetic field orientation sensors (514x-514z) configured to capture measurements of a magnetic field (550 552) in order to identify (i) a displacement of first and second scanning sensor heads in a first direction (X-Direction), and (ii) a gap separation of the first (410a) and second scanning sensor heads (410b) in a second direction (Z-Direction), and (iii) a displacement of the first and second scanning sensor heads in a third direction (Y- Direction). At least one of the magnetic field orientation sensors (514z) is disposed offset from a centerline (552) of the magnetic field such that an output from the at least one magnetic field orientation sensor indicates a combination of the gap separation and the displacement in either the first direction or the third direction.
摘要:
The present disclosure is directed toward a process for adjusting a papermaking process for producing parent rolls of convolutely wound web material having a machine direction (MD) and a cross-machine direction (CD) coplanar and orthogonal thereto that improves the characteristics of the parent rolls of wound web material to improve downstream convertability.
摘要:
A method includes obtaining (706) multiple images of a sheet (108) of material. The images contain a first line (204, 404, 504, 524a-524c, 544a-544c) projected onto a first side of the sheet and a second line (206, 406, 506a-506c, 526a-526c, 546a-546c) projected onto a second side of the sheet. The images include (i) at least one first image containing the first line reflected off the first side of the sheet and the second line transmitted through the sheet and (ii) at least one second image containing the second line reflected off the second side of the sheet and the first line transmitted through the sheet. The method also includes identifying (712) at least one point of intersection (410, 508, 528, 548) in the images where the lines intersect on the sheet. The method further includes identifying (718) a caliper of the sheet using the at least one point of intersection.
摘要:
Die Erfindung betrifft eine Vorrichtung zum Ausleuchten eines Maschinenbereichs (7), insbesondere zum Ausleuchten eines Maschinenbereichs (7) einer sehr breiten Maschine zum Herstellen einer Faserstoffbahn (8), umfassend ein Leuchtmittel (4), wobei das Leuchtmittel (4) in einem Bereich installiert ist, der innerhalb der Faserstoffbahnbreite liegt und an einem Maschinenbauteil (2, 3) derart angeordnet ist, dass zumindest ein Teilbereich der Faserstoffbahn (8) und/oder der Maschine, der innerhalb der Breite der produzierten Faserstoffbahn (8) liegt, ausgeleuchtet werden kann.
摘要:
A method, comprising:- conveying a web (W) of fibrous material via a first, upstream roller (52) and a second, downstream roller (54), wherein a tangential velocity ( v1 ) of the first roller is smaller than a tangential velocity ( v2 ) of the second roller, such that the web is pulled taut between them; - determining the following quantities:o the tangential speed ( v1 ) of the first roller, and the tangential speed ( v2 ) of the second roller; o a power ( P 2 ) supplied to the web by the second roller; and o a cross-sectional area ( A ) of the fibrous web, or any other quantities from which the named quantities are derivable;- determining Youngs modulus ( E ) of the fibrous material making up the web using the determined quantities. A fibrous web production apparatus implementing the method is also disclosed.
摘要:
An apparatus for incorporation into time-domain spectroscopy systems that creates a continuous reference whereby a sample pulses' phase and amplitude can be tracked and corrected employs a beam splitter to generate sample and reference pulses. A detector is positioned for receiving the reference radiation pulses that do not interact with the sample. The same detector is also positioned for receiving the sample radiation pulses that emerge from the sample. The apparatus can be readily implemented by being configured between the emitter and detector of a terahertz time-domain spectrometer. The reference pulse is used to trace the changes in time and amplitude of the sample pulse. Since any changes in the reference pulse will most likely manifest in the sample pulse, the reference pulse is monitored and used to correct the sample pulse and thereby reduce the effects of jitter.
摘要:
Erfindungsgemäß wird ein Verfahren zur Markierung von Fehlstellen (8) einer sich bewegenden Materialbahn, insbesondere Papier-, Tissue- oder Kartonbahn, vorgeschlagen, bei dem die Materialbahn (1) mittels eines Überwachungssystems (7) auf relevante Fehlstellen (8) überwacht wird, die mittels einer Steuer- und/oder Auswerteinheit (9) erfasst und ausgewertet werden, von der eine Markiervorrichtung (2) ansteuert wird die das Vorhandensein einer Fehlstelle (8) auf der Materialbahn (1) markiert. Wobei die Markierung der Materialbahn (1) mittels Laserlicht erfolgt.
摘要:
The invention relates to a method for patching a fibre web, in which method a fibre web (W) is observed by means of a detection device (30) to detect holes in the fibre web. In the method, when the detection device (30) has detected a hole in the fibre web, at least one piece of patching tape (31) is detachably adhered to a tape applicator roll (22). The patching tape (31) is adhered from the tape applica¬ tor roll (22) to the area of the hole in the fibre web (W) when the fibre web (W) is passed over the tape applicator roll (22). The invention also relates to a device for patching a fibre web, which device (20) comprises a detection device (30) to de¬ tect holes in the fibre web (W). The device (20) further comprises an applicator roll (22) for a patching tape (31), over which roll the fibre web (W) is arranged to run.