G - Physics – 01 – N
Patent
G - Physics
01
N
358/7
G01N 23/223 (2006.01) G01N 23/16 (2006.01) G01N 33/34 (2006.01)
Patent
CA 1223676
Abstract procedure for measuring, without destroying the specimen, the distribution in the thickness direction of the filler and/or coating materials of paper, cardboard or equivalent. In the procedure by radiation from a radio-isotope source is excited in the material component of the object of measurement to be examined, its characteristic x-ray radiation, the intensity of this radi- ation being observed. Measurements are made on both sides of the paper under examination and in addition the contents of other filler components are determined by x-ray absorption measurements to the purpose of eliminating the effects of these components distributing the distribution measurement. In addition, the base weight of the paper under examination (in g/m2) is measured e.g. by beta radiation absorption measurement. The filler distriljution measurements are carried out both with the aid of measurements of the characteristic radiation of the material components excited in the paper with different radiation sources and with the aid of absorption measurements of radiation obtained directly from the source or produced with its aid in transformation targets to the purpose of eliminating the effects of theese components distributing the distribution measurements. The means carrying out the procedure comprises a measuring head containing radiation sources and transfer mechanisms therefor, radiation transformation plates and transfer mechanisms therefor, and a radiation detector and a pre-amplifier . The measuring head is connected to a measuring apparatus comprising a power source , an amplifier and a counter, processor and display unit.
442285
Marks & Clerk
Robotest Oy
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