Tews Elektronik Gmbh&co. Kg

Tews Elektronik Dipl. -ing. Manfred Tews

Hendrik Richter

Udo Schlemm

Rainer Herrmann

Gerald Gallitz

Jürgen Kröger

A method for measuring substance quantities in a substance mixture including two substances, the method comprises determining a first moisture value for a first of the two substances using a microwave resonator. A second moisture value for the second of the two substances I determined using a microwave resonator. A first measured value and a second measured value are determined for the substance mixture using a microwave resonator. Two scalar factors are determined for two moisture vectors from the first and the second measured values for the substance mixture. The two moisture vectors indicate a direction of a straight line of equal moisture for the first and second substances in a plane of the first and second measured values using the first and second moisture value. A quantity of the first substance and of the second substance in the substance mixture are determined from the two scalar factors.

Method for measuring substance quantities in a mixture

Method for measuring a moisture value F of dielectric materials using at least one microwave resonator, one shift A of the resonant frequency being respectively evaluated for at least two resonance modes with resonant frequencies which are different from one another and a density-independent moisture value being calculated from the measured shifts in the resonant frequency.

Method and device for measuring a moisture value of dielectric materials

A method for the measurement of humidity and/or density in a measurement target. The phase and the amplitude of the microwave radiation transmitted through the measurement target is determined for a number of frequencies. The complex-valued transmission function of the measurement target is calculated from the determined values using the complex-valued transfer function of the measurement arrangement, and transformed into the time domain as a complex-valued time domain function. The point in time at which the amount of the main pulse has its maximum value is determined as a characteristic variable A from the time domain function. From the time domain function, the width of the main pulse is determined as a characteristic variable B, and/or the amplitude value of the main pulse as a characteristic variable H. A humidity and/or density of the measurement target is determined depending on the characteristic variable A and the characteristic variables B and/or H.

Method and device for humidity and/or density measurement

Apparatus and method for detection and segregation of faulty cigarettes in a production/packaging installation for cigarettes having an apparatus by means of which faulty cigarettes are segregated from the conveyed sequence of cigarettes, wherein the apparatus and method use a generator and evaluation circuits for radio-frequency electromagnetic fields and use a sensor past whose end surface the ends of the cigarettes are passed and which applies the radio-frequency electromagnetic fields to the end surface of the sensor, whose size corresponds approximately to the size of the end surface of the cigarettes, with the changes in the electromagnetic fields as a cigarette passes being evaluated.

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Hamburg, Germany

Hendrik Richter