Reflectometric moisture meter for capillary-porous materials, especially for the soil
First Claim
1. A reflectometric moisture meter for capillary-porous materials comprising:
- read-out means for reading the moisture of capillary-porous media from probe means installed in media of interest;
said probe means measuring the velocity of electromagnetic wave propagation in said medium as determined by its moisture,said read-out means further comprising;
a controller means to control co-operation of components of the read-out means and to compute results of the measurements;
an interface means for the communication of the controller with out components of said reflectometric moisture meter;
voltage pulse means to generate two needle pulses of voltage to supply the probe means;
pulse delay means to set the phase difference between said needle pulses of voltage; and
sampling means to catch samples of voltage from pulses returning as reflected from the probe means.
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Accused Products
Abstract
A meter is disclosed for measuring water content, particularly of soil. The probe (1) of the measuring device, fed with the needle electric pulse, is constituted of a set of waveguides connected parallely in the embranchment (2) with the microprocessor controller (10) of the electronic assemblies of the measuring device. Waveguides of the probe are installed in chosen layers of the material studied. The directly measured quantity is the sequence of time periods separating subsequent reflections of the electromagnetic wave propagating in the probe from the particular probe impedance discontinuties. The electromagnetic wave propagation velocity in a chosen layer of the medium is calculated on this basis, and therefrom the dielectric constant of the medium, and finally its moisture content upon which the dielectric constant depends.
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Citations
21 Claims
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1. A reflectometric moisture meter for capillary-porous materials comprising:
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read-out means for reading the moisture of capillary-porous media from probe means installed in media of interest;
said probe means measuring the velocity of electromagnetic wave propagation in said medium as determined by its moisture,said read-out means further comprising; a controller means to control co-operation of components of the read-out means and to compute results of the measurements; an interface means for the communication of the controller with out components of said reflectometric moisture meter; voltage pulse means to generate two needle pulses of voltage to supply the probe means; pulse delay means to set the phase difference between said needle pulses of voltage; and sampling means to catch samples of voltage from pulses returning as reflected from the probe means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 14, 21)
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11. A reflectometric moisture meter for capillary-porous materials comprising:
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read-out means for reading the moisture of capillary-porous media from probe means installed in media of interest;
said probe means measuring the velocity of electromagnetic wave propagation in said medium as determined by its moisture,said probe means further comprising; sensor means to force electromagnetic waves to propagate through said medium, feeder means to connect said sensor means in-parallel at an embranchment; main feeder means to link said embranchment with an input connector of said read-out means; time marker means to provide the probe means with a time reference; and memory cartridge terminal means to supply characteristics of the probe means actually read. - View Dependent Claims (12, 13, 15, 16, 17, 18, 19, 20)
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Specification