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Digital fluxgate magnetometer system

A fluxgate and magnetometer technology, applied in the direction of the size/direction of the magnetic field, can solve the problems of high cost and complex structure, and achieve the effect of reducing volume, low cost and strong practical significance

Pending Publication Date: 2018-03-16
HUAZHONG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Most of the fluxgate magnetometers currently on the market rely on imports, which are not only complex in structure but also expensive

Method used

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Embodiment 1

[0045] A digital fluxgate magnetometer system, the system is used to detect the magnetic field to be measured, the system block diagram is as follows figure 1 As shown, it includes probe, digital exciter, magnetic signal amplification processor, A / D sampler, temperature detector, MCU chip, serial port module and PC upper computer.

[0046] The probe is configured to perform fluxgate signal detection on the measured magnetic field.

[0047] The digital exciter is connected to the probe and the MCU chip, configured to receive the configuration frequency sent by the MCU chip, generate an excitation signal of the corresponding frequency, input it to the probe, and excite the probe.

[0048] The magnetic signal amplification processor is connected with the probe, and is used for extracting the magnetic field information detected by the probe, and converting the magnetic field information into a voltage signal.

[0049] The A / D sampler is connected to the magnetic signal amplificat...

Embodiment 2

[0077] For the measurement of non-electrical physical parameters, the measured value cannot be directly represented by analog electric quantity, and the same is true for the measurement of magnetic field. For the fluxgate probe, the measurement object is the axial magnetic field component and the output is the electrical signal. Therefore, in order to intuitively read the magnetic induction value of the magnetic field, it is necessary to find out the relationship between the two, which is the so-called "calibration".

[0078] The calibration method used in this description is: install the magnetic field measurement circuit and probe, and place it in a standard magnetic field generating device. By changing the output value of the standard magnetic field, and recording the voltage value displayed by the upper computer at this time into the sample table 1, analyze these two sets of data, find out the relationship between them, and obtain the calibration parameters.

[0079] Tabl...

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Abstract

The invention discloses a digital fluxgate magnetometer system comprising a probe, a digital exciter, a magnetic signal amplification processor, an A / D sampler, a temperature detector and an MCU chip,wherein the probe is configured to perform fluxgate signal detection on a measured magnetic field; the digital exciter is connected with the probe and the MCU chip and configured to receive configuration frequency sent by the MCU chip to generate simulation signals of a corresponding frequency to stimulate the probe; the magnetic signal amplification processor is connected with the probe, extracts magnetic field information detected by the probe and converts magnetic field information into voltage signals; the A / D sampler is connected with the magnetic signal amplification processor and the MCU chip and configured to perform A / D sampling on the voltage signals and then send the voltage signals into the MCU chip; the temperature detector is connected with the MCU chip and configured to detect the environment temperature and send a temperature value into the MCU chip; the MCU chip is connected with a PC upper computer through a serial module and configured to acquire voltage signals after the A / D sampling and the temperature value and send the voltage signals and the temperature value into the PC upper computer for magnetic field strength calculation and display.

Description

technical field [0001] The invention relates to the technical field of magnetic field measurement, in particular to a digital fluxgate magnetometer system. Background technique [0002] Magnetic field measurement technology has a long history and has been widely used in many fields, such as geophysics, space technology, military engineering, industry, biology, medicine and archaeology. [0003] Among the many magnetic measuring instruments, the fluxgate magnetometer is widely used due to its advantages of light weight, small size, simple circuit, high sensitivity, good stability, low power consumption, easy digitization and suitable for use in high-speed motion systems. It is used for magnetic field measurement in various occasions, especially suitable for applications near zero magnetic field and under weak magnetic conditions. The fluxgate magnetometer can not only measure the magnetic field strength, but also measure the component of the magnetic field in a certain axis,...

Claims

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Application Information

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IPC IPC(8): G01R33/02
CPCG01R33/02
Inventor 瞿少成黄芝龙王能河罗文潘冬
Owner HUAZHONG NORMAL UNIV
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