Alternating current induced magnetic field sensor with measuring frequency scanning function

A technology of inducting magnetic field and measuring frequency, which is applied in the direction of the size/direction of the magnetic field, can solve the problems that the measured AC magnetic field signal is weak and cannot effectively filter out noise and interference, and achieve the effect of filtering out noise and interference

Active Publication Date: 2014-06-25
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology

[0006] There are various types of noise and interference in the AC magnetic field measurement environment, and the measured AC magnetic field signal is very weak, and the methods currently used cannot effectively filter out the noise and interference

Method used

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  • Alternating current induced magnetic field sensor with measuring frequency scanning function

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Embodiment Construction

[0031] Such as figure 1 As shown, the present invention discloses an AC induction magnetic field sensor with the function of measuring frequency scanning, including a frequency adjustable multi-channel signal generator 1, a first frequency converter 4, a crystal filter 5, a second frequency converter 6, a band-pass Filter 7, phase-sensitive detector 8, low-pass filter 9, low-noise amplifier 10, excitation magnetic field coil 11, probe, described frequency adjustable multi-channel signal generator 1 is connected with described probe, first frequency converter 4 respectively , the second frequency converter 6, the phase sensitive detector 8, and the excitation magnetic field coil 11 are connected, the probe, the first frequency converter 4, the crystal filter 5, the second frequency converter 6, The band-pass filter 7, the phase-sensitive detector 8, the low-pass filter 9, and the low-noise amplifier 10 are connected in sequence.

[0032] The probe includes an amorphous materia...

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Abstract

The invention provides an alternating current induced magnetic field sensor with a measuring frequency scanning function. The alternating current induced magnetic field sensor with the measuring frequency scanning function is characterized in that a frequency adjustable multi-passage signal generator, a first transducer, a crystal filter, a second transducer, a band-pass filter, a phase-sensitive detector, a low pass filter, a low-noise amplifier, an excitation magnetic field coil and a probe are included, the probe, the first transducer, the second transducer, the phase-sensitive detector and the excitation magnetic coil are connected with the frequency adjustable multi-passage signal generator respectively, and the probe, the first transducer, the crystal filter, the second transducer, the band-pass filter, the phase-sensitive detector, the low pass filter and the low noise amplifier are sequentially connected with one another. The alternating current induced magnetic field sensor has the advantages of being capable of scanning an alternating current frequency sensing magnetic field and effectively filtering noise and disturbance.

Description

technical field [0001] The invention relates to the technical field of weak magnetic field measurement and an AC magnetic field measurement device, in particular to an AC induction magnetic field sensor with a measurement frequency scanning function. Background technique [0002] AC magnetic field sensors are widely used in the fields of industry, measurement, and medicine. There are many magnetic field measurement methods and measurement technologies in current applications. Commonly used are Hall effect, giant magnetoresistance effect, giant magnetoimpedance effect, and superconducting quantum interference effect. Various types of technologies have resulted in related products such as search coil sensors, giant magnetoresistance sensors, giant magnetoresistance sensors, Hall sensors, fluxgate sensors, and superconducting quantum interferometers. [0003] Compared with other sensing technologies such as fluxgate sensors and giant magnetoresistance sensors, sensors using gia...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/02
Inventor 许洪光张霆廷张钦宇林茂六
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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