Bobbin for a magnetic sensor

Details Bobbin for a magnetic sensor Bobbin for a magnetic sensor

H - Electricity

01

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349/57, 336/68,

H01F 27/24 (2006.01) G01R 33/04 (2006.01) G01V 3/26 (2006.01) G01V 3/40 (2006.01) H01F 5/02 (2006.01) H01F 27/30 (2006.01) H01F 38/22 (2006.01)

Patent

CA 1296075

PATENT B02242 BOBBIN FOR A MAGNETIC SENSOR Abstract A magnetometer sensor is described for a borehole survey. The magnetometer features a bobbin made from a metal alloy such as copper-nickel, which has a very low magnetic permeability, on the order of 1.0001, which can be joined to a magnetic metal alloy, such as Permalloy, by welding, which can be treated by annealing at a temperature of 1500 degrees Fahrenheit and which has a thermal coefficient of expansion generally on the order of the magnetic alloy. In one particular embodiment, the magnetometer sensor comprises a strip of magnetic metal alloy wrapped around the aforesaid bobbin to define a magetic core, one excitation winding wrapped around the core, a plastic frame for carrying the magnetic core and excitation winding and at least one sense winding wrapped around the frame, the core and the excitation winding.

557501

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