Spherical electromagnetic water current velocity sensor with protruding electrodes
US4015471A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1975 |
| Grant date | Apr 5, 1977 |
| Priority date | — |
| Expiry date | Nov 18, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P5/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Electromagnetic sensing means are disclosed for measuring the velocity of a current of fluid, such as water, characterized by the use of a spherical body containing electromagnetic means including a first coil for establishing a first magnetic field in the fluid in which the spherical body is submerged, and a plurality of pairs of peripherally mounted circumferentially spaced pairs of diametrically arranged electrodes which are contained in a common first plane normal to the axis of the first magnetic field, each electrode of the electrode pair protruding radially outwardly from the outer surface of the spherical body a common distance which is between 0.100 and 0.125 inch per inch of the diameter of the spherical body. In a two-axis embodiment, first and second orthogonally-arranged pairs of diametrically opposed electrodes are provided, together with detecting and indicating means for comparing the electrical signals produced across the electrodes of the electrode pairs, respectively. In a three-axis embodiment, an orthogonally-arranged second coil is also provided for producing a second magnetic field the axis of which is contained in the common first plane and which bisects an …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.