Frequency-analysis-type water level measuring method and device

Details Frequency-analysis-type water level measuring method and device Frequency-analysis-type water level measuring method and device

1997-09-19

2000-04-25

Williams, Hezron

Measuring and testing

Liquid level or depth gauge

73 492, G01F 23296

Patent

active

060530421

ABSTRACT:
A method and device of measuring a water level of a frequency analysis type is disclosed. The device is consisted of a pipe type of which immersed length is in a proportion to the water level and which is installed in a container having a fluid, a signal detecting device which has an impact apparatus to provide a source signal periodically or continuously and a impact detecting sensor(s) which gets a response signal of the pipe by the impact apparatus, and a signal analyzer which processes the signal from the impact detecting sensor. The method comprises steps of: generating a source signal to the pipe by the impact apparatus; detecting the response signal of the pipe according the water level by the impact detecting sensor; analyzing the response signal to the frequency response spectra by the signal analyzer; and measuring the water level by comparing to the predetermined frequencies which was obtained by the signal analyzer.

REFERENCES:
patent: 1956920 (1934-05-01), Haltmeier
patent: 4170311 (1979-10-01), Spaw
patent: 4599892 (1986-07-01), Doshi

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