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Reflectometric moisture meter for capillary-porous materials, especially for the soil

  • US 4,918,375 A
  • Filed: 06/21/1988
  • Issued: 04/17/1990
  • Est. Priority Date: 07/03/1987
  • Status: Expired due to Fees
First Claim
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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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