Magnetometer with structure asymmetry correction
First Claim
1. Magnetometer comprising a magnetic core, at least one active coil (4,5) and a receiver coil (10), the active coil being arranged so as to create a magnetic excitation field in the core, the receiver coil having two windings (11, 12), means for passing an alternating current at an excitation frequency in the active coil and means (14) for measuring a voltage induced in the receiver coil, wherein the measurement means comprise a detector (27) for measuring, in the induced voltage, a synchronous component having the excitation frequency, a circuit with two loops (21, 22) each of which comprises a winding of the receiver coil, an adder (25) for adding values of partial voltages respectively generated at terminals of them loops, thus obtaining the induced voltage and a device for correction (28) of one of the said partial voltages, controlled by the detector.
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Accused Products
Abstract
A differential magnetometer consisting of at least one active coil (4, 5) and a receiver coil (10) for which the windings are installed differentially, is provided with a measurement circuit (14) with a slaving device that corrects dissymmetry appearing between windings (11, 12) to eliminate residual induction at the frequency of the magnetic excitation field, intended to make the measurement coil (10) more sensitive without applying a voltage to it.
13 Citations
2 Claims
- 1. Magnetometer comprising a magnetic core, at least one active coil (4,5) and a receiver coil (10), the active coil being arranged so as to create a magnetic excitation field in the core, the receiver coil having two windings (11, 12), means for passing an alternating current at an excitation frequency in the active coil and means (14) for measuring a voltage induced in the receiver coil, wherein the measurement means comprise a detector (27) for measuring, in the induced voltage, a synchronous component having the excitation frequency, a circuit with two loops (21, 22) each of which comprises a winding of the receiver coil, an adder (25) for adding values of partial voltages respectively generated at terminals of them loops, thus obtaining the induced voltage and a device for correction (28) of one of the said partial voltages, controlled by the detector.
Specification
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- Resources
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Current AssigneeCommissariat a L'Energie Atomique (AES Corporation)
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Original AssigneeCommissariat a L'Energie Atomique (AES Corporation)
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InventorsGuilhamat, Bernard, Leger, Jean-Michel
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Primary Examiner(s)Patidar, Jay M.
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Application NumberUS10/485,050Publication NumberTime in Patent Office1,526 DaysField of Search330/84, 330/107, 330/110, 324/208, 324/233, 324/202, 324/225, 324/244, 324/247, 324253-255, 324/258, 324/260US Class Current324/253CPC Class CodesG01R 33/045 in single-, or multi-apertu...
