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US 7,399,380 B2Granted
Jet velocity vector profile measurement and control
AssigneeHoneywell International Inc.
InventorsJohan Ferm, Anders Hübinette, Ross K. MacHattie, Anders Hallgren, John F. Shakespeare
Life of this patent
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Abstract
In a papermaking system having a headbox to dispense a jet of liquid and paper forming fibers, an improvement comprising at least one sensor arrangement for simultaneously or sequentially measuring in at least one location the jet velocity or jet flow correlation of the jet at plural known angles relative to the machine direction. The measured data is analyzed to generate a velocity vector profile or velocity direction profile of the jet, and hence to determine the profile of fiber orientation angles laid down in the sheet formed of the jet.
Claims26
A system comprising:
- at least one arrangement of sensors for substantially simultaneously measuring a velocity of a jet of liquid and paper-forming fibres emerging from a headbox of a papermaking system in at least two known angles to a machine direction and for generating velocity data;
- a memory for storing the velocity data to generate a velocity vector profile of the jet;
- and
- a processor for analyzing the velocity vector profile to determine an orientation of the fibres within the jet;
- wherein the at least one arrangement of sensors comprises at least three sensor sets, each sensor set having first and second spaced sensors, the sensor sets arranged serially along the machine direction.
2 more elements
A system comprising:
- at least one arrangement of sensors configured to substantially simultaneously measure a velocity of a jet of liquid and paper-forming fibres emerging from a headbox of a papermaking system in at least two known angles to a machine direction and to generate velocity data;
- a memory configured to store the velocity data to generate a velocity vector profile of the jet;
- and
- a processor configured to analyze the velocity vector profile to determine an orientation of the fibres within the jet;
- wherein the at least one arrangement of sensors comprises:
- multiple sensors;
- and
- an array of mirrors comprising:
- first and second fixed mirrors each oriented at an angle to the machine direction;
- and
- a movable mirror, whereby movement of the movable mirror acts to establish different optical paths that allow the sensors to measure the velocity of the jet at different angles to the machine direction.
8 more elements
A system comprising:
- at least one arrangement of sensors for substantially simultaneously measuring a velocity of a jet of liquid and paper-forming fibres emerging from a headbox of a papermaking system at two or more known angles to a machine direction and for generating velocity data;
- means for storing the velocity data to generate a velocity vector profile of the jet;
- and
- means for analyzing the velocity vector profile to determine an orientation of the fibres within the jet;
- wherein the at least one arrangement of sensors comprises at least three sensor sets, each sensor set having first and second spaced sensors, the sensor sets arranged serially along the machine direction.
2 more elements
A method comprising:
- measuring a velocity of a jet of liquid and paper-forming fibres emerging from a headbox of a papermaking system substantially simultaneously at two or more known angles to a machine direction to generate velocity data;
- creating a velocity vector profile of the jet using the velocity data;
- and
- analyzing the velocity vector profile to determine an orientation of the fibres within the jet;
- wherein measuring the velocity of the jet comprises using a sensor arrangement comprising at least three sensor sets, each sensor set having first and second spaced sensors, the sensor sets arranged serially along the machine direction.
2 more elements
A method comprising:
- measuring a velocity of a jet of liquid and paper-forming fibres emerging from a headbox of a papermaking system substantially simultaneously at two or more known angles to a machine direction to generate velocity data;
- creating a velocity vector profile of the jet using the velocity data;
- and
- analyzing the velocity vector profile to determine an orientation of the fibres within the jet;
- wherein measuring the velocity of the jet comprises using a sensor arrangement, the sensor arrangement comprising multiple sensors and an array of mirrors, the array of mirrors comprising two fixed mirrors each oriented at an angle to the machine direction and a movable mirror, whereby movement of the movable mirror establishes different optical paths that allow the sensors to measure the velocity of the jet at different angles to the machine direction.
2 more elements
Dependencies are inferred from the claim text.