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US 2003/0191588 A1Published application
Apparatus for determining the moisture content of a medium
Assigneeimko Intelligente Micromodule Köhler GmbH
InventorKurt Kohler
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Assigneeimko Intelligente Micromodule Köhler GmbH
InventorKurt Kohler
Estimating the term…
In an apparatus for determining the moisture content of a medium forming a dielectric of a measuring conduit of a probe, which apparatus includes an electronic evaluation unit, a signal generator providing a pulse signal to one end of the measuring conduit, a receiver for receiving a reflected signal returned to the one end of the measuring conduit and a time measuring device for determining the time elapsed between the supply of the signal and the return of the reflected signal, the electronic evaluation unit is arranged in close proximity to the one end of the measuring conduit and provided with temperature compensating means.
An apparatus for determining the moisture content of a medium forming a dielectric of a measuring conduit of a probe said apparatus including an electronic evaluation unit, a signal generator providing a pulse signal to one end of said measuring conduit, a receiver for receiving a reflected signal returned to said one end of the measuring conduit, and a time measuring device for determining the time elapsed between the supply of said signal to said measuring conduit and the return of the reflected signal to the one end of the measuring conduit, said evaluation unit being arranged in close proximity to the one end of said measuring conduit and including temperature compensating means.
Dependencies are inferred from the claim text.
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Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or…
Investigating or analysing materials by determining their chemical or physical properties
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The invention resides in an apparatus for determining the moisture content of a medium, which forms the dielectric of a measuring conduit representing a probe. The apparatus includes an electronic evaluation device with a pulse signal generator supplying a pulse signal to one end of the measuring conduit, a receiver receiving the reflected signal at the same end and a device for determining the time delay between the sent signal the reflected signal.
Such an apparatus is known for example from EP 0 478 851 B1 and has been successfully commercialized by the patentee. The essential element of the known apparatus is the measuring cable.
The measuring conduit can have different forms. The measuring conduit may consist for example of two parallel rods or it may be in the form of a probe as disclosed in DE 43 34 649 C2.
The sole Figure shows schematically an arrangement according to the invention.
As shown in the Figure, a probe includes a cylindrical housing 1, which is provided at its front end with a pillow 6 filled with gel. At the opposite end, the housing 1 is provided with a handle 7.
In the gel-filled pillow 6, two electrical conduits 2a, 2b are arranged in spaced parallel relationship. They are connected to an evaluation device 3 by connecting wires 3a, 3b. The connecting wires 3a, 3b are fixed in the housing 1 so that their length remains unchanged.
The handle 7 includes a contactor 8, which is connected to the electronic evaluation unit 3 by a connecting cable 8a. By means of the contactor 8, the measuring procedure of the apparatus can be initiated.