Communications: directive radio wave systems and devices (e.g. – Determining distance – Material level within container
Patent
1986-02-19
1988-04-12
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Determining distance
Material level within container
342172, 342192, G01S 1308
Patent
active
047377917
ABSTRACT:
A sweep frequency, continuous wave (CW) radar tank gauge (3) providing measurement of the level of tank contents or ullage (19), having greatly improved accuracy through improved methods of processing calibrate and return signals directed toward the surface of tank contents (20). Use of sweep synchronous measurement (46) of time domain calibrate/return difference signals (42) and determination of a virtual "carrier" fundamental in the frequency domain, provide highly accurate measure of tank signal return times. The entire range of return signals is made available for processing and analysis (5), including distinguishable tank bottom reflections.
REFERENCES:
patent: 3888588 (1975-06-01), Granqvist
patent: 4044353 (1977-08-01), Levy
patent: 4044355 (1977-08-01), Edvardsson
patent: 4106020 (1978-08-01), Johnson
patent: 4245221 (1981-01-01), Kipp et al.
patent: 4360812 (1982-11-01), Peperone
patent: 4621264 (1986-11-01), Yashiro et al.
R. Nitzberg, "Implementation of an Adaptive Processor by Modern Spectral Estimation Techniques"; Int'L. Conf. on Communications Conference Record (Denver, 1981; pp. 10.3.1 to 10.3.4).
Blanchard Andrew J.
Clark Billy V.
Jean Buford R.
Newton Richard W.
Warren Gary L.
Blum Theodore M.
Gregory Bernarr Earl
IDEA, Incorporated
Lidd Francis J.
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