US3681688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring device for currents in high voltage conductors
Assignee: Siemens AG
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Filing: 1970-07-23
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Granted: 1972-08-01
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Expires: 1990-07-23
Abstract
Abstract A transmitter emits beams at low voltage. A modulator at high voltage modulates the beams in accordance with a current to be measured. The modulator comprises an oscillating reflector oscillating in accordance with the current to be measured and modulates the beams impinging upon the reflector. A receiver at low voltage receives the modulated beams and converts them into a magnitude corresponding to the current to be measured. The reflector of the modulator reflects the modulated beams to the receiver.
Inventors
- 👤 Wolfgang Hermstein
- 👤 Klaus Mollenbeck
- 👤 Gerhard Gericke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:02
CPC Classifications
G; G01; G01R; G01R15/00; G01R15/14; G01R15/24; G01R15/248
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
132 words
A measuring device for currents in high voltage conductors, comprising a transmitter for emitting beams at low voltage; a modulation device at high voltage for modulating beams emitted by said transmitter in accordance with a current to be measured, said modulation device comprising a reflector which oscillates in accordance with the current to be measured and the oscillations of which are in the direction of the beams emitted by said transmitter, said reflector modulating the frequency of the beams impinging upon said reflector by utilizing the Doppler effect; and a receiver at low voltage for receiving the modulated beams from said modulation device and converting said modulared beams into a magnitude corresponding to the current to be measured, the oscillating reflector of said modulation device reflecting said modulated beams to said receiver.
Claim 2
Dependent Claim
132 words
A measuring device for currents in high voltage conductors, comprising a transmitter for emitting beams at low voltage; a modulation device at high voltage for modulating beams emitted by said transmitter in accordance with a current to be measured, said modulation device comprising a reflector which oscillates in accordance with the current to be measured and the oscillations of which are in the direction of the beams emitted by said transmitter, said reflector modulating the frequency of the beams impinging upon said reflector by utilizing the Doppler effect; and a receiver at low voltage for receiving the modulated beams from said modulation device and converting said modulared beams into a magnitude corresponding to the current to be measured, the oscillating reflector of said modulation device reflecting said modulated beams to said receiver.
Claim 3
Dependent Claim
14 words
A measuring device as claimed in claim 1, wherein said beams are light beams.
Claim 4
Dependent Claim
13 words
A measuring device as claimed in claim 1, wherein said beams are microwaves.
Claim 5
Dependent Claim
39 words
A measuring device as claimed in claim 1, wherein said beams are transmitted through the atmosphere between said transmitter and said modulation device and said modulated beams are transmitted through the atmosphere between said modulation device and said receiver.
Claim 6
Dependent Claim
47 words
A measuring device as claimed in claim 1, wherein said beams are light beams, and further comprising light conducting fiber means between said transmitter and said modulation device for conducting said light beams and between said modulation device and said receiver for conducting the modulated light beams.
Claim 7
Dependent Claim
41 words
A measuring device as claimed in claim 1, wherein said beams are microwaves, and further comprising waveguides between said transmitter and said modulation device for conducting said microwaves and between said modulation device and said receiver for conducting the modulated microwaves.
Claim 8
Dependent Claim
44 words
A measuring device as claimed in claim 1, wherein said oscillating reflector comprises magnetic means for producing a magnetic field having a field intensity corresponding to the current to be measured and a magnetostrictive oscillator having a reflecting surface exposed to said magnetic field.
Claim 9
Dependent Claim
45 words
A measuring device as claimed in claim 1, wherein said oscillating reflector comprises a piezoelectric oscillator having a reflecting surface and voltage means for producing a voltage having a magnitude corresponding to the current to be measured and applying said voltage to said piezoelectric oscillator.
Claim 10
Dependent Claim
40 words
A measuring device as claimed in claim 1, wherein said oscillating reflector comprises an electromagnetic moving coil oscillator having a mirror and current means for passing a current corresponding to the current to be measured to said moving coil oscillator.
Claim 11
Dependent Claim
63 words
A measuring device as claimed in claim 1, further comprising a beam divider in proximity with said transmitter for splitting the beams emitted by said transmitter into two beams and directing one of the two beams to said modulation device and directing the other of the two beams to said receiver, said receiver utilizing said other of said two beams as a reference.
Claim 12
Dependent Claim
27 words
A measuring device as claimed in claim 1, further comprising base modulating means at said transmitter for modulating the beams emitted by sAid transmitter to suppress disturbances.
Claim 13
Dependent Claim
115 words
A measuring device as claimed in claim 1, wherein said modulation device comprises a plurality of oscillating reflectors oscillating in accordance with the current to be measured and modulating beams emitted by said transmitter and impinging upon said reflectors thereby enlarging the measuring range, each of said oscillating reflectors providing a corresponding measuring sub-range, and said receiver comprises a plurality of receivers each receiving the modulated beams from a corresponding one of said oscillating reflectors, and further comprising a beam divider in proximity with said transmitter for splitting the beams emitted by said transmitter into a plurality of beams and directing each of said plurality of beams to a corresponding one of said oscillating reflectors.
Claim 14
Dependent Claim
31 words
A measuring device as claimed in claim 1, further comprising another oscillating reflector having a known temperature characteristic for correcting the temperature-dependent operation of the oscillating reflector of said modulation device.
Claim 15
Dependent Claim
33 words
A measuring device as claimed in claim 7, further comprising a protective screen in proximity with the reflecting surface of said magnetostrictive oscillator for protecting said reflecting surface from contamination and atmospheric influences.
Claim 16
Dependent Claim
43 words
A measuring device as claimed in claim 7, wherein said magnetostrictive oscillator comprises a tube of magnetostrictive material and a high voltage conductor extending through said tube, said tube having a surface facing said transmitter and said receiver and including said reflecting surface.
Claim 17
Dependent Claim
19 words
A measuring device as claimed in claim 15, wherein the tube of said magnetostrictive oscillator is of rectangular cross-section.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |