GB671812A - Piezo-electric magnetometer - Google Patents
Piezo-electric magnetometerInfo
- Publication number
- GB671812A GB671812A GB19379/50A GB1937950A GB671812A GB 671812 A GB671812 A GB 671812A GB 19379/50 A GB19379/50 A GB 19379/50A GB 1937950 A GB1937950 A GB 1937950A GB 671812 A GB671812 A GB 671812A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crystal
- field
- ambient
- loop
- piezo
- 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.)
- Expired
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
- G01R33/0283—Electrodynamic magnetometers in which a current or voltage is generated due to relative movement of conductor and magnetic field
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
671,812. Magnetic tests. WALLAUSCHEK, R. Aug. 3, 1950 [Sept. 27, 1949], No. 19379/50. Class 37. A piezo-electric crystal 9, Fig. 5, is energized from a generator 10 so as to vibrate; deposited on the crystal is a metallic loop which thus vibrates in the ambient field to generate oscillations whose magnitude is proportional to the ambient field; these oscillations are applied to a meter 11. In a modified circuit, two identical crystals 81, 89 are fed in pushpull so that the currents induced in the loops 91, 92 are additive for the ambient field, and equal and opposite for any field due to the exciting current from the supply leads. The crystal 1, Fig. 2, has energizing electrodes 2, 3, and a metal ribbon 6 embracing the crystal. In a modification, the crystal has electrodes 2, 3, Fig. 6, the electrode 2 being extended at its centre at 6, Fig. 5, over the edge of the crystal to form a loop; the circuit is such that pick-up from the generator 10 in the loop 6, 2, 6, produces no output from transformer 22, while pick-up due to the ambient magnetic field is indicated on meter 11.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR671812X | 1949-09-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB671812A true GB671812A (en) | 1952-05-14 |
Family
ID=9017170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB19379/50A Expired GB671812A (en) | 1949-09-27 | 1950-08-03 | Piezo-electric magnetometer |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB671812A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3142796A (en) * | 1953-08-18 | 1964-07-28 | Harold D Goldberg | Method and apparatus utilizing a conductor loop in a magnetic field for measuring areas and related quantities |
-
1950
- 1950-08-03 GB GB19379/50A patent/GB671812A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3142796A (en) * | 1953-08-18 | 1964-07-28 | Harold D Goldberg | Method and apparatus utilizing a conductor loop in a magnetic field for measuring areas and related quantities |
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