EP0118359A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electrostatic accelerometer
Assignee: Office National d'Études et de Recherches Aérospatiales
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Filing: 1984-02-28
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Granted: —
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Expires: 2004-02-28
Abstract
Abstract A tridimentional electrostatic accelerometer comprising a cube-shaped test weight (10), on each of the six faces of said cube a pair of conductina electrodes a hollow cage accomodating said test weight and twelve electrodes on said cage, forming with the test weight electrodes three sets of four capacitors C ij where i varies from 1 to 4 and j is x, y or z respectively. Means are provided for measuring for each value of j the sums and differences of capacities and for deriving from these quantities voltages for positioning the test weight (10) which are applied selectively to the electrodes of the set of capacitors C ij .
Inventors
- 👤 Alain Maurice Bernard
- 👤 Bernard René Sacleux
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 02:51
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/02; G01P15/08; G01P15/13; G01P15/131; G01P15/125; G01P15/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
256 words
1 - A tridimensional electrostatic accelerometer comprising : a cube-shaped test weight ; on each of the six faces of said cube a pair of conducting electrodes, two electrodes being adjacent on each face and the electrodes on two parallel faces of the cube being opposite two by two, whereby each electrode on a face has an adjacent electrode on the same face, an opposite electrode or the parallel face and a diagonally opposite electrode on said parallel face and the electrodes forming three sets of four electrodes, each set comprising a given electrode, an adjacent electrode, an opposite electrode and a diagonally opposite electrode and being respectively associated with a given one among three orthogonal coordinate axes ; a hollow cage accomodating said test weight ; twelve electrodes on said cage, forming with the test weight electrodes three sets of four capacitor C.. where i varies from 1 to 4 and j is x, y or z respectively associated with said orthogonal coordinate axes ; means for measuring for each value of j the quantities and producing voltages proportional thereto ; means for forming with said above quantities and producing voltages proportional thereto ; means for forming with said above quantities and applying a voltage proportional thereto to the given electrode of an electrode set ; and applying a voltage proportional thereto to the opposite electrode of said set and applying a voltage proportional thereto the opposite electrode of said set and applying a voltage proportional thereto to the diagonally opposite electrode of said set.
Claim 2
Dependent Claim
256 words
1 - A tridimensional electrostatic accelerometer comprising : a cube-shaped test weight ; on each of the six faces of said cube a pair of conducting electrodes, two electrodes being adjacent on each face and the electrodes on two parallel faces of the cube being opposite two by two, whereby each electrode on a face has an adjacent electrode on the same face, an opposite electrode or the parallel face and a diagonally opposite electrode on said parallel face and the electrodes forming three sets of four electrodes, each set comprising a given electrode, an adjacent electrode, an opposite electrode and a diagonally opposite electrode and being respectively associated with a given one among three orthogonal coordinate axes ; a hollow cage accomodating said test weight ; twelve electrodes on said cage, forming with the test weight electrodes three sets of four capacitor C.. where i varies from 1 to 4 and j is x, y or z respectively associated with said orthogonal coordinate axes ; means for measuring for each value of j the quantities and producing voltages proportional thereto ; means for forming with said above quantities and producing voltages proportional thereto ; means for forming with said above quantities and applying a voltage proportional thereto to the given electrode of an electrode set ; and applying a voltage proportional thereto to the opposite electrode of said set and applying a voltage proportional thereto the opposite electrode of said set and applying a voltage proportional thereto to the diagonally opposite electrode of said set.
Claim 3
Dependent Claim
185 words
2 - A tridimensional electrostatic accelerometer comprising : a cube-shaped test weight ; on each of the six faces of said cube a pair of conducting electrodes ; a cube-shaped hollow cage accomodating said test weight ; twelve electrodes, located two by two on each face of the cube-shaped cage, said electrodes forming with the test weight electrodes three sets of four capacitor C ij where i varies from 1 to 4 and j is x, y or z, x, y and z being orthogonal coordinate axes ; means for producing for each value of j voltages proportional to : which are respectively, in the set of four capacitors j, the differences and the sums of a first pair of aligned capacitors C lj and C 2j and a second pair of aligned capacitors C 3j and C 4j ; means for producing voltages proportional to plus and minus the overall difference of said sums and means for producing voltages proportional to plus and minus the overall differences of said differences and means for selectively applying said plus and minus overall voltages to said capacitors.
Claim 4
Dependent Claim
185 words
2 - A tridimensional electrostatic accelerometer comprising : a cube-shaped test weight ; on each of the six faces of said cube a pair of conducting electrodes ; a cube-shaped hollow cage accomodating said test weight ; twelve electrodes, located two by two on each face of the cube-shaped cage, said electrodes forming with the test weight electrodes three sets of four capacitor C ij where i varies from 1 to 4 and j is x, y or z, x, y and z being orthogonal coordinate axes ; means for producing for each value of j voltages proportional to : which are respectively, in the set of four capacitors j, the differences and the sums of a first pair of aligned capacitors C lj and C 2j and a second pair of aligned capacitors C 3j and C 4j ; means for producing voltages proportional to plus and minus the overall difference of said sums and means for producing voltages proportional to plus and minus the overall differences of said differences and means for selectively applying said plus and minus overall voltages to said capacitors.
References Cited (Backward Citations)
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