METHOD AND APPARATUS FOR MEASURING PROPERTIES OF BOARD PRODUCTS

摘要

An apparatus (1000) for measuring at least one property of a board product, such as a paperboard product includes a transmitter (1104) for applying a vibrational excitation to at least one region of the board product. The excitation includes a plurality of frequencies lying within a predetermined frequency range. The apparatus further includes a receiver (1200) for measuring a vibrational response of the board product to the vibrational excitation. A processor (1102) processes the measured vibrational response to obtain a frequency response of the region of the board product to the excitation, and analyses the frequency response to determine a measure of at least one property of the board product.