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Method and device for measuring grammage (basis weight, mass per unit area) and moisture of a sheet, for example of paper, using a dielectric resonator
Method and device for measuring grammage (basis weight, mass per unit area) and moisture of a sheet, for example of paper, using a dielectric resonator
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机译:使用介电共振器测量纸张(例如纸张)的克重(基本重量,每单位面积的质量)和水分的方法和设备
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摘要
A grammage measuring apparatus includes a dielectric resonator (1) which is arranged only at one surface side of a sample (10); a shielding container (4) with which the dielectric resonator (1) is substantially covered except for a sample measuring surface; a microwave excitation device (6,2a) which causes the dielectric resonator (1) to generate an electric field vector; a detection device (8,2b) which detects transmission energy or reflection energy by the dielectric resonator (1); a storage device (12) in which a calibration curve indicating a resonance frequency shift amount for a grammage is stored; and a data processing device (14) which calculates the grammage of a measuring sample from the calibration curve and measurement result of the resonance frequency shift amount of the measuring sample.
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