Patent ID: 8463560

Claim:
A method of measuring at least one property of a paperboard product, the method comprising: applying, by a device, a vibration to a member that applies a vibrational excitation that applies a plurality of frequencies to at least one region of the paperboard product as the paperboard product moves in a machine direction (MD); measuring, by the device, a frequency response of the at least one region of the paperboard product to the vibrational excitation; determining, by the device, information associated with one or more amplitudes with respect to the frequency response, the one or more amplitudes being associated with one or more vibrations; using, by the device, the determined information, associated with the one or more amplitudes with respect to the frequency response, to obtain a measure of the at least one property of the paperboard product; and scaling, by the device, the obtained measure of the at least one property of the paperboard product to determine information associated with a quality of the paperboard product.