FR2352305A1 - Electromagnetic field measurement system - uses ferrite rod sensor, LC detector circuit and Faraday cage - Google Patents
Electromagnetic field measurement system - uses ferrite rod sensor, LC detector circuit and Faraday cageInfo
- Publication number
- FR2352305A1 FR2352305A1 FR7615704A FR7615704A FR2352305A1 FR 2352305 A1 FR2352305 A1 FR 2352305A1 FR 7615704 A FR7615704 A FR 7615704A FR 7615704 A FR7615704 A FR 7615704A FR 2352305 A1 FR2352305 A1 FR 2352305A1
- Authority
- FR
- France
- Prior art keywords
- cage
- vector
- ferrite rod
- electromagnetic field
- faraday cage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/028—Electrodynamic magnetometers
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Radiation (AREA)
Abstract
The device described enables the vetor B of the electromagnetic field to be measured and is not affected by the vector E. The electrical circuits are enclosed in a conducting metallic cage, known as a Faraday cage, and this screen stem from the action of the vector E. The B vector is measured using a ferrite rod (1) which comes out of the Faraday Cage. The cage comprises two parts; the mobile part carrying the ferrite rod, while the fixed part contains the measurement apparatus. The two parts are electrically connected. The B vector induces electron spin vibration in the ferrite (1) and these vibrations propagate in the rod to the inside of the cage where they are detected by an LC oscillatory circuit (2, 3) tuned to the vibrational frequency of the B vector. Part of the inductance, L, (2) surrounds the ferrite rod inside the cage.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7615704A FR2352305A1 (en) | 1976-05-17 | 1976-05-17 | Electromagnetic field measurement system - uses ferrite rod sensor, LC detector circuit and Faraday cage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7615704A FR2352305A1 (en) | 1976-05-17 | 1976-05-17 | Electromagnetic field measurement system - uses ferrite rod sensor, LC detector circuit and Faraday cage |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2352305A1 true FR2352305A1 (en) | 1977-12-16 |
FR2352305B3 FR2352305B3 (en) | 1979-02-16 |
Family
ID=9173570
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7615704A Granted FR2352305A1 (en) | 1976-05-17 | 1976-05-17 | Electromagnetic field measurement system - uses ferrite rod sensor, LC detector circuit and Faraday cage |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2352305A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3509356A1 (en) * | 1985-03-15 | 1989-08-10 | Licentia Gmbh | Method and arrangement for detecting electromagnetic waves |
EP0536447A1 (en) * | 1991-10-11 | 1993-04-14 | Koninklijke Emballage Industrie Van Leer B.V. | Exposure meter for use with induction heat sealing of containers |
US6255815B1 (en) * | 1998-08-20 | 2001-07-03 | Neotonus, Inc. | Magnetic field calibration device including housing with locator window |
US6486664B1 (en) | 1998-07-01 | 2002-11-26 | Lepel Corp. | Magnetic field exposure sensor and analysis system |
-
1976
- 1976-05-17 FR FR7615704A patent/FR2352305A1/en active Granted
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3509356A1 (en) * | 1985-03-15 | 1989-08-10 | Licentia Gmbh | Method and arrangement for detecting electromagnetic waves |
EP0536447A1 (en) * | 1991-10-11 | 1993-04-14 | Koninklijke Emballage Industrie Van Leer B.V. | Exposure meter for use with induction heat sealing of containers |
WO1993007504A1 (en) * | 1991-10-11 | 1993-04-15 | Koninklijke Emballage Industrie Van Leer B.V. | Exposure meter for use with induction heat sealing of containers |
US5432437A (en) * | 1991-10-11 | 1995-07-11 | Koninklijke Emballage Industrie Van Leer B.V. | Exposure meter for use with indiction heat sealing of containers |
US6486664B1 (en) | 1998-07-01 | 2002-11-26 | Lepel Corp. | Magnetic field exposure sensor and analysis system |
US6255815B1 (en) * | 1998-08-20 | 2001-07-03 | Neotonus, Inc. | Magnetic field calibration device including housing with locator window |
Also Published As
Publication number | Publication date |
---|---|
FR2352305B3 (en) | 1979-02-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse | ||
AR | Application made for restoration | ||
DI | Inadmissibility of an action of restoration |