Method and an apparatus for performing a measurement of a continuous sheet
AssigneeMetso Paper Automation Oy
InventorJohn Shakespeare
Life of this patent
Estimating the term…
Abstract
The invention relates to a method and an arrangement for performing a measurement of a continuous sheet. At least one measurement of the sheet is performed by at least one sensor, an estimate of the sampling function of the sensor being available. The solution comprises means for performing deconvolution using at least one iteration of an algorithm which corresponds to the deconvolution, and the means are arranged to perform the deconvolution of the at least one measurement with the estimate of sampling function. The solution can be applied in a CD-measurement of a continuous sheet. The solution can also be applied in controlling production of a continuous sheet.
Claims36
A method for performing a measurement of a continuous sheet, the method comprising:
- performing at least one measurement of the sheet in which an estimate of the sampling function of the measurement is available;
- performing the deconvolution of the at least one measurement with the estimate of the sampling function using at least one iteration of an algorithm which corresponds to the deconvolution.
A method for performing a CD-measurement of a continuous sheet, the method comprising:
- scanning the sheet;
- performing during scanning at least one measurement of the sheet in which an estimate of the sampling function of the measurement is available;
- performing the deconvolution of the at least one measurement with the estimate of the sampling function using at least one iteration of an algorithm which corresponds to the deconvolution.
A method for controlling production of a continuous sheet, the method comprising:
- scanning the sheet across the production line;
- performing during scanning at least one measurement of the sheet in which an estimate of the sampling function of the measurement is available;
- performing the deconvolution of the at least one measurement with the estimate of the sampling function using at least one iteration of an algorithm which corresponds to the deconvolution;
- and
- controlling the production of the continuous sheet using the at least one deconvoluted measurement.
An arrangement for performing a measurement of a continuous sheet, the arrangement comprising:
- at least one sensor for performing at least one measurement of the sheet, an estimate of the sampling function of the sensor being available;
- means for performing deconvolution using at least one iteration of an algorithm which corresponds to the deconvolution, and the means are arranged to perform the deconvolution of the at least one measurement with the estimate of the sampling function.
An arrangement for performing a CD-measurement of a continuous sheet, the arrangement comprising:
- at least one sensor for performing at least one measurement of the sheet, an estimate of the sampling function of the sensor being available;
- means for performing deconvolution using at least one iteration of an algorithm which corresponds to the deconvolution, and the means are arranged to perform the deconvolution of the at least one measurement with the estimate of the sampling function.
An arrangement for controlling production of a continuous sheet, the arrangement comprising:
- at least one sensor for performing at least one measurement of the sheet, an estimate of the sampling function of the sensor being available;
- means for performing deconvolution using at least one iteration of an algorithm which corresponds to the deconvolution, the means being arranged to perform the deconvolution of the at least one measurement with the estimate of the sampling function;
- and
- means for controlling the production of the continuous sheet using the at least one deconvoluted measurement.
Dependencies are inferred from the claim text.