Measuring and testing – Moisture content or absorption characteristic of material
Patent
1993-05-21
1994-08-30
Gutierrez, Diego F. F.
Measuring and testing
Moisture content or absorption characteristic of material
324667, 324664, G01N 2722, G01R 2726
Patent
active
053416732
ABSTRACT:
A system for monitoring the moisture content of soil uses a timing capacitor. The capacitor has several conductive elements adapted for insertion into soil to sense the hydration state capacitance of the soil. A capacitance-to-frequency converter electrically connected to the capacitor has an oscillator circuit. The frequency of the oscillator circuit has a frequency dependent upon the value of the capacitor and independent of the electrical losses in the capacitor. A data logger measures the frequency generated by the capacitance-to-frequency converter, the frequency bearing a known relationship to the dielectric constant and, hence, the water content of the soil. The conductive elements are surrounded by shields of electrical potential substantially equal to that of the timing capacitor.
REFERENCES:
patent: 3081429 (1963-03-01), Moe
patent: 3465243 (1969-09-01), Benson, Jr. et al.
patent: 4616425 (1986-10-01), Burns
patent: 4638594 (1987-01-01), Huguet et al.
patent: 4683904 (1987-08-01), Iltis
patent: 4864850 (1989-09-01), Price
patent: 4887023 (1989-12-01), Gimson
patent: 4929885 (1990-05-01), Dishman
patent: 5224769 (1993-07-01), Holbrook et al.
Burns Michael J.
Holbrook Noel M.
Gutierrez Diego F. F.
University of Florida
LandOfFree
Method and device for monitoring of moisture in soil does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and device for monitoring of moisture in soil, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for monitoring of moisture in soil will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-23801