Sensor for the detection of random signals which are suitable for correlative signal processing
US4604904A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 1983 |
| Grant date | Aug 12, 1986 |
| Priority date | — |
| Expiry date | Sep 20, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P5/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.