초록 ▼

Microwave device for the continuous measurement of the viscosity of a viscous medium. The device includes a microwave source connected via a microwave guide to a sensor essentially incorporating at least one semi-rigid, coaxial microwave guide (2) for immersion in the medium. The cable has an outer

Microwave device for the continuous measurement of the viscosity of a viscous medium. The device includes a microwave source connected via a microwave guide to a sensor essentially incorporating at least one semi-rigid, coaxial microwave guide (2) for immersion in the medium. The cable has an outer sheath (4) and a core (6), which conduct electricity and are arranged coaxially. The space defined between the outer sheath and the core is filled by a dielectric (8). The core has a bare end (12) for placing in contact with the viscous medium. The sensor is intended to produce in the medium incident microwaves of a given power level, and to detect the power of the microwaves reflected by the medium. A second microwave guide (10) is provided for coupling the detector to the sensor.

대표청구항 ▼

Device for the continuous real time measurement of the viscosity of a polar viscous resin (22) said device comprising, in combination, a microwave source (26), a sensor having at least one semirigid, coaxial microwave cable (2, 2a, 2b, 2c, 2d) for immersion in the resin to be measured, and means (10

Device for the continuous real time measurement of the viscosity of a polar viscous resin (22) said device comprising, in combination, a microwave source (26), a sensor having at least one semirigid, coaxial microwave cable (2, 2a, 2b, 2c, 2d) for immersion in the resin to be measured, and means (10, 10a, 10b) for connecting said sensor via a microwave guide to a microwave source, said cable having an outer sheath (4, 4c, 4d) and a core (6, 6c, 6d) which conduct electricity and which are arranged coaxially, the space defined between the sheath and the core being filled with a dielectric (8), said core having a bare end (12, 12a, 12b, 12c, 12d) for placement in contact with the viscous resin to be measured, said sensor producing in said medium incident microwaves of a given power and detecting the power of microwaves reflected by the resin, a detector (42) for transforming the power of the reflected microwaves into an electric signal which is a rising function of the viscosity, a first microwave guide (34, 36, 38) for coupling the microwave source to the sensor, and a second microwave guide (40) for coupling the detector to the sensor.