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Heavy-current low-power magnetic field signal difference acquisition apparatus

A technology of magnetic field signal and acquisition device, which is applied to the magnetic field measurement using electromagnetic devices, the magnetic field measurement using the principle of magnetic flux control, and the size/direction of the magnetic field, which can solve the problem that the secondary coil is not unlimited.

Inactive Publication Date: 2015-12-23
TIANJIN UNIV
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Problems solved by technology

[0006] The existing magnetic gradiometers all improve the secondary coil, but based on the limitations of the existing manufacturing process, the improvement of the secondary coil is not unlimited; or analyze the measurement results from theoretical analysis; these often have certain limitations Only by enhancing the secondary magnetic field can it be easily measured

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  • Heavy-current low-power magnetic field signal difference acquisition apparatus
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  • Heavy-current low-power magnetic field signal difference acquisition apparatus

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Embodiment Construction

[0023] At present, traditional gradiometers generate a magnetic field through a wound excitation coil, and then measure the secondary magnetic field through two secondary coils. However, compared with the main magnetic field, the secondary magnetic field is several orders of magnitude lower, which requires higher requirements on the secondary coil and sampling circuit, and requires a larger dynamic range and better sensitivity. In actual use, the secondary coil is often improved, such as using GMR to replace the simple wound secondary coil, so as to achieve an acceptance sensitivity that is approximately independent of frequency, so as to better measure the secondary magnetic field. However, the scope of these components is limited, and the higher the requirements, the higher the price, which is not conducive to popularization. Therefore, improving the traditional gradiometer to make the secondary magnetic field easier to measure has very important research value and practical...

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Abstract

The invention, which relates to the technical field of the magnetic field imaging, provides a heavy-current low-power magnetic field signal difference acquisition apparatus. On the basis of improvement of a traditional gradiometer, a secondary magnetic field can be measured easily; and the apparatus has the great research values and practical application value. According to the technical scheme, the apparatus is formed by an excitation unit clamped between two receiving units; and the excitation unit is a low-power heavy-current LC oscillating circuit and is formed by parallel connection of inductive capacitors. The apparatus is mainly applied to the design and manufacturing of magnetic field imaging equipment.

Description

technical field [0001] The invention relates to the technical field of magnetic field imaging. Specifically, it relates to a high-current, low-power magnetic field signal differential acquisition device. Background technique [0002] With the continuous improvement of modern magnetic detection technology, the use of magnetic field to measure distance is becoming a research hotspot. Compared with traditional ultrasonic ranging and laser ranging, magnetic ranging has many advantages: it does not depend on the reflection of the medium and the surface of the measured object and the orientation of the measured object, and can realize the autonomous capture and positioning of the target magnet Wait. Magnetic ranging technology can be further divided into two types: scalar ranging and gradient tensor ranging: scalar ranging mainly realizes ranging by measuring the total magnetic field, which requires a large amount of data collection and uses a certain optimization algorithm to f...

Claims

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Application Information

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IPC IPC(8): G01R33/022
Inventor 薛玮肖谧雷志春
Owner TIANJIN UNIV
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