Groundwater pressure measurement

Details Groundwater pressure measurement Groundwater pressure measurement

1988-03-25

1989-02-21

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367908, G01S 1308, G01S 1508

Patent

active

048072010

ABSTRACT:
An apparatus measures changes in groundwater pressure in a borehole. The apparatus comprises: a probe consisting of a hollow tube having a smooth interior surface, an ultrasonic transmitter which emits ultrasonic waves down the interior of the tube, and an ultrasonic receiver which receives and registers the reflected ultrasonic waves; a means to raise and lower the probe so the tube is partially submerged in the groundwater; a means to control the emission of ultrasonic waves; a means to convert the time interval into a distance or pressure measurement; and a means to store or transmit the data.

REFERENCES:
patent: 2232476 (1941-02-01), Ritzmann
patent: 2713263 (1955-07-01), Turner
patent: 3394589 (1968-07-01), Tomioka
patent: 3834233 (1984-09-01), Willis
patent: 4090407 (1978-05-01), Shuler
patent: 4170765 (1979-10-01), Austin
patent: 4318298 (1982-03-01), Godbey
patent: 4461172 (1984-07-01), McKee
patent: 4523465 (1985-06-01), Fasching

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