Sensing water and moisture using a delay line

Details Sensing water and moisture using a delay line Sensing water and moisture using a delay line

1998-02-11

2000-05-09

Ballato, Josie

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324640, 73290, G01R 2726

Patent

active

060608897

ABSTRACT:
A phase shift oscillator circuit having a delay line in a feedback loop is employed to determine soil moisture content and water level. The delay line is connected to the oscillator such that the dielectric value of the medium inside the delay line influences the frequency of the oscillator circuit. The delay line is placed in the medium to be studied. Soil moisture content and water level are calculated as a function of the frequency of the oscillator output, and changes in soil moisture content or water level are calculated as a function of changes in oscillator frequency over time. An elongated delay line is employed to measure water level.

REFERENCES:
patent: 2607830 (1952-08-01), Razek
patent: 3596176 (1971-07-01), Laupman
patent: 3710244 (1973-01-01), Rauchwerger
patent: 3864974 (1975-02-01), Rauchwerger
patent: 4399403 (1983-08-01), Strandberg
patent: 4560923 (1985-12-01), Hanson
patent: 4616425 (1986-10-01), Burns
patent: 5341673 (1994-08-01), Burns et al.
patent: 5642098 (1997-06-01), Maria et al.
patent: 5760694 (1998-06-01), Nissim et al.

Affiliated with

Also associated with

Rating

Sensing water and moisture using a delay line does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sensing water and moisture using a delay line, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sensing water and moisture using a delay line will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1068529