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High-resolution orthogonal flux gate three-axis magnetometer based on amorphous wires and manufacturing technology thereof

An orthogonal magnetic flux, high-resolution technology, applied in the high-resolution orthogonal fluxgate three-axis magnetometer and its manufacturing field, can solve the problems of large low-frequency temperature drift, high noise, strong perming effect, etc.

Inactive Publication Date: 2018-09-11
南京麦科尼传感技术有限公司 +1
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Problems solved by technology

The giant magneto-impedance (GMI) magnetic field sensor has become a fierce competitor of the fluxgate with its wider bandpass and higher frequency response characteristics, however, they still have high 1 / f noise in the low frequency region, strong perming effect and low frequency Defects such as large temperature drift

Method used

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  • High-resolution orthogonal flux gate three-axis magnetometer based on amorphous wires and manufacturing technology thereof
  • High-resolution orthogonal flux gate three-axis magnetometer based on amorphous wires and manufacturing technology thereof
  • High-resolution orthogonal flux gate three-axis magnetometer based on amorphous wires and manufacturing technology thereof

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Embodiment Construction

[0025] The Co-based amorphous wire treated with stress relief annealing is used as the magnetic core of the sensor probe, and the sampling coil is directly wound on the amorphous wire to make a compact axisymmetric linear amorphous wire sensor probe;

[0026] Co-Fe-Si-B-RE amorphous wire rapid quenching-cold drawing-heat treatment, 400℃, 10kg / mm 2 Tensile stress annealing 10min., 230 ℃ annealing 60min.

[0027] The probe core has an amorphous wire with a diameter of 100 microns and a length of 30 mm (not including the 2mm solder joint length at both ends); preparation of the sampling coil: use a 50 micron diameter enameled wire to wind three layers for a total of 1380 turns.

[0028] The three-axis magnetometer probe framework of polysulfone material is processed on the computer program-controlled machine tool, and the three amorphous wire sensor probes are positioned and fixed on the X-axis and Y-axis of the orthogonal coordinate system of the orthogonal cube skeleton with a ...

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Abstract

The invention provides a high-resolution orthogonal flux gate three-axis magnetometer based on amorphous wires and a manufacturing technology thereof. The method comprises the steps that a non-magnetic and low-expansion-coefficient polysulfone is used, a cubic framework of nylon and the like, and six positioning bonding pads are orthogonally configured with three compact axisymmetric amorphous wire probes, forming an x axis, a y axis and a z axis; a precision machine which is used for machining to ensure that the orthogonal degree error between the three axes of the magnetometer is smaller than 0. 1. An x axis, a y axis and a z axis amorphous wire which are connected in parallel are stimulated by a power circuit and an excitation current circuit, the mutual interference among the shafts iseliminated, the measurement consistency of three components of the magnetic field is high, and the power consumption is greatly reduced. The three-axis magnetometer is a three-axis magnetometer witha noise (pT) level. Compared with a three-axis parallel magnetic flux gate with the same high resolution, the three-axis parallel magnetic flux gate is small in size (1 / 5), the frequency response is high (0-100Hz), the power consumption is low, and the magnetic field measurement space resolution is high. The method is suitable for measuring the flight attitude of the earthquake forecast, the directional drilling, the satellite and the missile, and belongs to the fields of exploration, monitoring and the like of geomagnetic navigation and guidance, aviation magnetic detection and underwater weapons.

Description

technical field [0001] The invention relates to a high-resolution orthogonal fluxgate three-axis magnetometer based on amorphous wire and its manufacturing technology. technical background [0002] Magnetic field sensors are very important today as the world enters the information age. The existing magnetic field sensors include Hall element, AMR, GMR, TMR, GMI, fluxgate, atomic magnetometer, proton magnetometer, laser magnetometer, electromagnetic induction magnetometer and various optical pumps. As far as the vector magnetic field sensor is concerned, the traditional parallel fluxgate sensor with permalloy as the core is the most widely used, and the peak-to-peak noise of the best commercially available parallel fluxgate sensor has been reduced. to below 0.1 Nant (nT). The giant magneto-impedance (GMI) magnetic field sensor has become a fierce competitor of the fluxgate with its wider bandpass and higher frequency response characteristics, however, they still have high 1...

Claims

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Application Information

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IPC IPC(8): G01R33/02G01R3/00
CPCG01R3/00G01R33/0206
Inventor 周勋章雷章复中
Owner 南京麦科尼传感技术有限公司
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