Device and method for determining properties of a soil
US5898310A · kind A · utility
Inventor
Key dates
| Filing date | Jul 22, 1997 |
| Grant date | Apr 27, 1999 |
| Priority date | — |
| Expiry date | Jul 22, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/246
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measuring instrument for measuring the matrix potential in a soil, has a measuring cell with a housing that includes at least in certain sections thereof, material permitting the moisture of the soil to penetrate into the interior of the housing, at least two electrodes which are arranged in said housing in spaced relationship with each other and a dielectric which fills the space between said electrodes and the inner wall of the housing, a measurement evaluation circuit which detects the water content in the dielectric of the measuring cell by measurement of changes of permittivity of the dielectric and determines, on the basis of said water content and on the basis of a known relationship between the water content and the matrix potential of the dielectric used, the matrix potential prevailing in the dielectric, and which displays said matrix potential as a measuring result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.