Patent ID: 6526119
Filing Date: 2003-02-25
Classification: G01N

Abstract:
A method for measuring the moisture content of wood chips by forming an essentially homogenous flow of wood chips, directing gamma radiation essentially transversely through the flow of wood chips, measuring the attenuation of the gamma radiation passing through the flow of wood chips, and by determining the proportional value of the total mass at the penetration point of the gamma radiation, in which case, the moisture content is obtained as a function of this value and the measured attenuation, characterized in that the gamma radiation is collimated from at least one side of the flow of wood chips, to create a measurement ray, the length of this measurement ray in the flow of wood chips is measured, and the air content of the flow of wood chips is determined, in which case the proportional value of the aforesaid mass is determined with the aid of the aforesaid length and air content.