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High-precision relative magnetic field intensity measuring device

A technology of magnetic field strength and measuring device, applied in the direction of measuring device, measuring magnetic variable, instrument, etc., can solve the problems of limited wide application and large weight, and achieve the effect of improving measurement accuracy, low cost and wide application range

Inactive Publication Date: 2015-09-09
HARBIN ENG UNIV
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  • Abstract
  • Description
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Problems solved by technology

The fluxgate sensor is the main device of the flux method measurement technology and has high sensitivity, but its wide application is limited due to the large volume and weight of the probe and the circuit device.

Method used

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  • High-precision relative magnetic field intensity measuring device
  • High-precision relative magnetic field intensity measuring device
  • High-precision relative magnetic field intensity measuring device

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Experimental program
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Embodiment Construction

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] The present invention includes a two-dimensional magnetic field detector and a host. The two-dimensional magnetic field detector includes a two-dimensional magnetoresistive sensor, peripheral circuits, protective sleeves, sensor cables and interfaces; the host includes the detector interface, keys, LCD display and control / processing circuit board. The control / processing circuit board is composed of a power supply circuit, a central controller (PIC microcontroller), a differential amplifier circuit, an ADC circuit, and the like.

[0032] The magnetic field sensor adopts a two-dimensional magnetoresistive sensor, which can measure the magnetic field strength in two orthogonal directions at the same time.

[0033] The central control / processor controls the setting and resetting of the magnetoresistive sensor. Through the setting and resetting, the measurement of the...

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Abstract

The invention belongs to the field of detection of relative magnetic field intensity, and specifically relates to a high-precision relative magnetic field intensity measuring device suitable for the field of physics experiment teaching of institutions of higher learning and used for verifying the Biot-Savart law. The high-precision relative magnetic field intensity measuring device includes a magnetic resistance sensing device, a central control processing module and a fixed guide rail device. The device adopts a dual-axis magnetoresistive sensor and a bidirectional bias difference value algorithm, and can effectively eliminate or reduce external interference, thereby improving measurement precision, and the precision can reach 0.001mT. The high-precision relative magnetic field intensity measuring device provided by the invention is stable in system operation, high in integration level, and low in cost, the sensing device is flexible to use, an operation interface is simple and visual, and thus the device has a wide range of application.

Description

technical field [0001] The invention belongs to the field of detection of relative magnetic field strength, in particular to a high-precision relative magnetic field strength measuring device suitable for the field of physical experiment teaching in colleges and universities and used for verifying the Biot-Saffar law. Background technique [0002] At present, the application of magnetic field has been very extensive, not only in the research of physical properties in modern science and the needs of physics teaching, but also in industrial and agricultural production, national defense and medical treatment. Magnetic sounding has become a necessary tool in the study of seismology, geophysics and astrophysics. Therefore, it is of great significance to study the method of measuring the magnetic field. [0003] There are many methods to measure the magnetic field, such as fluxgate method, Hall effect method, magnetic resonance method, superconducting effect method, magneto-optic...

Claims

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Application Information

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IPC IPC(8): G01R33/09G09B23/18
Inventor 孙晶华张晓峻温家保李玉财孙健
Owner HARBIN ENG UNIV
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