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US4604904A Expired / Lapsed US ⏱️ 0.0 years remaining

Sensor for the detection of random signals which are suitable for correlative signal processing

Assignee: Ramsey Technology Inc
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Filing: 1983-09-20
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Granted: 1986-08-12
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Expires: 2003-09-20
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Abstract

Abstract The sensor (20) is intended for the detection of random signals, suitable for correlative signal processing, originating from a process in motion relative to the sensor, for example a flow passing through a pipeline (1). Signals of this nature are used, in particular, for the measurement of velocity or running time. The sensor (20) is subdivided into several sensor segments (21, 22, 23, 24) in order to increase sensitivity for a given spatial frequency filter effect. In the case of a capacitive sensor, each sensor segment consists of two electrodes encompassing the pipeline (1). The sensor segments (21, 22, 23, 24) are arranged along the direction of motion according to a coding selected on the basis of the desired spatial frequency filter effect, with the introduction of gaps (25, 25, 27) which are insensitive to the characterizing parameter of the process in motion. The spatial frequency filter effect and, in particular, its limit frequency, will then correspond to that of an individual sensor segment, while the total aperture, which determines the sensitivity, is equal to the sum of the aperture segments of the sensor segments present.

Inventors

  • 👤 Robert Massen

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 03:21
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/18

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 102 words
Sensor for the detection of random signals from a process in motion relative to the sensor, said signals being suitable for correlative signal processing, in particular for the purposes of correlative measurement of velocity or running time, said sensor having a total aperture sensitive to a parameter characteristic for the process in motion, said total aperture being subdivided into aperture segments separated by gaps which are not sensitive to said parameter of the process in motion, said aperture segments and gaps being arranged along the direction of motion according to a binary coding which results in a time-compressed signal upon correlative reception.
Claim 2
Dependent Claim 102 words
Sensor for the detection of random signals from a process in motion relative to the sensor, said signals being suitable for correlative signal processing, in particular for the purposes of correlative measurement of velocity or running time, said sensor having a total aperture sensitive to a parameter characteristic for the process in motion, said total aperture being subdivided into aperture segments separated by gaps which are not sensitive to said parameter of the process in motion, said aperture segments and gaps being arranged along the direction of motion according to a binary coding which results in a time-compressed signal upon correlative reception.
Claim 3
Dependent Claim 15 words
Sensor as claimed in claim 1, wherein said binary coding corresponds to a pseudo-random code.
Claim 4
Dependent Claim 16 words
Sensor as claimed in claim 1, wherein said binary coding corresponds to a binary PN sequence.
Claim 5
Dependent Claim 21 words
Sensor as claimed in claim 1, wherein said aperture segments are oriented at different angles around the process to be measured.
Claim 6
Dependent Claim 21 words
Sensor as claimed in claim 1, wherein said aperture segments are constituted by the appropriately subdivided electrodes of a capacitive sensor.
Claim 7
Dependent Claim 60 words
Correlative measuring arrangement comprising two sensors as claimed in claim 1, arranged along the direction of motion of the process at a predetermined center-to-center interval, wherein the effective aperture segments of the end portion of each sensor are located in gaps of the end portion of the other sensor so that said end portions of the two sensors are interlaced.

References Cited (Backward Citations)

US3762221A Cited
US4257275A Cited
US4248085A Cited
US4363244A Cited
JPS5774617A Cited
SU979858A2 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1989-08-11 1990-02-10 1990-08-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-08-11 1994-02-10 1994-08-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-08-11 1998-02-10 1998-08-12 $7700.00 Window Closed / Lapsed

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