Alternating current magnetic field sensor with measuring frequency scanning function

A technology for measuring AC magnetic field and measuring frequency, which is applied in the direction of measuring magnetic variables, measuring devices, instruments, etc. It can solve the problems of weak AC magnetic field signal and cannot effectively filter out noise and interference, and achieve the goal of filtering out noise and interference. Effect

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 A

Method used

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  • Alternating current magnetic field sensor with measuring frequency scanning function

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Embodiment Construction

[0027] like figure 1 As shown, the present invention discloses an AC 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 low-pass filter 7, low noise amplifier 8, probe, the frequency adjustable multi-channel signal generator 1 is connected with the probe, the first frequency converter 4, and the second frequency converter 6 respectively, the probe, the first frequency conversion The converter 4, the crystal filter 5, the second frequency converter 6, the low-pass filter 7, and the low-noise amplifier 8 are connected in sequence.

[0028] The probe includes an amorphous material part 2, a preamplifier 3, and a DC bias coil 9, the amorphous material part 2 is connected to the input end of the preamplifier 3, and the frequency adjustable multi-channel signal generator 1 Connected to the amorphous material pa...

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Abstract

The invention provides an alternating current magnetic field sensor with a measuring frequency scanning function. The alternating current magnetic field sensor with the measuring frequency scanning function comprises a frequency adjustable multi-passage signal generator (1), a first transducer (2), a crystal filter (5), a second transducer (6), a low pass filter (7), a low-noise amplifier (8) and a probe. The probe, the first transducer (4) and the second transducer (6) are respectively connected with the frequency adjustable multi-passage signal generator (1). The probe, the first transducer (4), the crystal filter (5), the second transducer (6), the low pass filter (7), and the low noise amplifier (8) are sequentially connected with one another. The alternating current 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 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 giant magneto...

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Application Information

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IPC IPC(8): G01R33/09
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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