Open-type magnetic field shielding device capable of adjusting at full frequency band

A shielding device and full frequency band technology, applied in the direction of magnetic/electric field shielding, active shielding, electrical components, etc., can solve the problems that the magnetic field regulator cannot be adjusted, unfavorable engineering practice, large volume ratio, etc., and achieve the effect that is beneficial to engineering practice
CN108401409AActive Publication Date: 2018-08-14TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2018-08-14

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Abstract

The invention discloses an open-type magnetic field shielding device capable of adjusting at full frequency band, and belongs to the technical field of electromagnetic compatibility. The magnetic field shielding device comprise a magnetic field searching coil, a magnetic field detection oil, a driving circuit, a magnetic field adjustment coil and a corresponding matched sample table, wherein the magnetic field detection coil is used for monitoring change of an environmental magnetic field, the magnetic field adjustment coil is driven to offset with an external magnetic field by the driving circuit after a power is amplified, the magnetic field searching coil is placed right above the device, the sample table is placed in the center of the magnetic field adjustment coil, the magnetic fielddetection coil is connected with a magnetic field detection probe and is placed on the sample table, the driving circuit is placed at an outer side of the magnetic field adjustment coil, and a shielded magnetic field is arranged above the driving circuit. The magnetic field shielding device capable of adjusting at full frequency band is more beneficial for engineering practice.
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Description

technical field

[0001] The invention relates to the field of electromagnetic compatibility, in particular to an open magnetic field shielding device for full-frequency regulation, in particular to an open magnetic field shielding device for AC and DC full-frequency regulation. Background technique

[0002] With the continuous development of human civilization, the electromagnetic environment is deteriorating day by day. Electromagnetic noise is especially serious around high-voltage lines, large electrical appliances, and large steel structures. Magnetic field cancellation is a common support technology for many precision sciences. In some extreme measurement environments: such as high-precision atomic clock electron beam imaging devices, mass spectrometers, medium and micro Widely referenced in subprobing. In some biomagnetic measurements, the signal to be tested is mostly at 10pT (1×10 -11 ) is even lower in magnitude. The environmental noise magnetic field is 3-6 order...

Claims

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