Measuring method of a wide range level and an apparatus thereof

Details Measuring method of a wide range level and an apparatus thereof Measuring method of a wide range level and an apparatus thereof

1995-03-17

1998-12-01

Dombroske, George M.

Measuring and testing

Liquid level or depth gauge

73290V, G01F 2300

Patent

active

058423745

ABSTRACT:
A method for measuring the water level of a reservoir, a larger river and an underground water and an apparatus thereof comprises a waveguide tube selected in a predetermined length, on the upper portion of which a sonic pulse generator is mounted, and a plurality of sonic receivers (first, second, third . . . nth), such as a microphone, arranged at an interval l from each another, in which the sonic pulse generator generates sonic impulses in a predetermined period, the receivers receive impulses divided into advancing waves and reflecting waves in turns, these impulses are amplified/wave-shaped to be applied to a microprocessor, and the microprocessor measures the time interval t.sub.1 between the advancing wave and the reflecting wave received by first sonic receiver and the time interval t.sub.n-1 between first sonic receiver and the n-1th sonic receiver located close to the water surface so as to calculate the water level L. Also, when the water level L is measured on the slope surface of a reservoir, a larger river, etc., a ball type float is inserted in the waveguide tube. In order to measure the water level of the underground water, a supporting rod, which has a plurality of sonic receivers (first, second, third . . . nth) are fixed at a predetermined interval l, is inserted into an underground water observing tube instead of the waveguide tube.

REFERENCES:
patent: 3597971 (1971-08-01), Erienbach
patent: 3597973 (1971-08-01), Ryder
patent: 3890840 (1975-06-01), Malloy
patent: 3921461 (1975-11-01), Layton
patent: 3954010 (1976-05-01), Hilblom
patent: 4063457 (1977-12-01), Zekulin et al.
patent: 4943186 (1990-07-01), McCoy
patent: 5119676 (1992-06-01), Bower

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