Analysing the composition of the contents of a container by measuring the complex dielectric properties at plural frequences selected from the range of several Hz to plural GHz

摘要

The device for analyzing a composition contained in a container, comprises a unit (40') for transmitting or receiving an electromagnetic field with several frequencies, a container (R') intended to receive a constant volume (2-10 centiliters) of liquid, a supporting unit (22') for the container adapted to ensure a constant positioning between the receiving or transmitting units and the container, and a unit (50) for measuring complex impedance of the receiving or transmitting units influenced by a load constituted by the container representing complex dielectric characteristics. The device for analyzing a composition contained in a container, comprises a unit (40') for transmitting or receiving an electromagnetic field with several frequencies, a container (R') intended to receive a constant volume (2-10 centiliters) of liquid, a supporting unit (22') for the container adapted to ensure a constant positioning between the receiving or transmitting units and the container, and a unit (50) for measuring complex impedance of the receiving or transmitting units influenced by a load constituted by the container representing complex dielectric characteristics of the container and its contents, and a unit to provide information relating to the nature of the contents of the container according to the measured complex impedance. The transmitting or receiving units comprise an antenna. The supporting unit and the transmitting or receiving unit are arranged so that the container is laid out at the center of antennas. A second unit (40) is arranged for transmitting or receiving an electromagnetic field with several frequencies. A second supporting unit (22) of another container (R) is adapted to ensure a relative precise positioning between the second receiving or transmitting unit and the other container. The information providing unit comprises a commutation unit. Complex impedance of second receiving or transmitting unit influenced by the load constituted by the other container and its contents representative of the complex dielectric characteristics of the other container and of its contents is measured using the same measuring unit.