Terrestrial magnetic sensor
AssigneeAlps Electric Co., Ltd.
InventorYasuaki Watanabe
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Abstract
A terrestrial magnetic sensor has a bobbin body having a magnetic core inserting groove, a silicon gel filled in the magnetic core inserting groove, a magnetic core buried in the silicon gel filled in the magnetic core inserting groove, and a bobbin cover for closing the magnetic core inserting groove of the bobbin body. Thus, this terrestrial magnetic sensor can suppress the decrease in the magnetic permeability by burying a magnetic core in a silicon gel and can be hardly affected by the influences of the variations in an environmental temperature and an external stress.
Claims8
A terrestrial magnetic sensor comprising:
- a bobbin body having a magnetic core inserting groove,
- a silicon gel filled in the magnetic core inserting groove,
- a magnetic core buried in the silicon gel filled in the magnetic core inserting groove, and
- a bobbin cover for closing the magnetic core inserting groove of the bobbin body.
A magnetic detector comprising:
- a toroidal bobbin having a toroidal chamber defined therein, the toroidal chamber being filled with a heat insulating gel;
- a ring-shaped magnetic core enclosed in said chamber and encased in said gel so as to be substantially insulated from the influences of environmental temperature;
- and
- a coil wound about the toroidal bobbin for magnetically exciting the magnetic core.
Dependencies are inferred from the claim text.