Device and method for measuring weak eddy magnetic field
A technology of eddy current magnetic field and measuring device, which is applied in the direction of measuring device, magnetic field measurement with electromagnetic devices, and the size/direction of magnetic field, etc., to achieve the effect of simple realization, easy operation and high reliability
Active Publication Date: 2017-07-14
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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[0006] In order to solve the limitations of existing eddy current magnetic field measurement methods, the present invention provides a weak eddy current magnetic field measurement device and method based on synchronous data acquisition and Helmholtz coils, which not only improves the measurement accuracy of eddy current magnetic field, but also simplifies the measurement steps of eddy current magnetic field , and can accurately measure the eddy current magnetic field of the large-scale system as a whole
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[0040] In order to make the purpose, specific solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0041] The weak eddy current magnetic field measuring device of the present invention is as figure 1As shown, it includes a magnetic shielding room 1, a Helmholtz coil 2, a measured object 3, a measured object support 4, a magnetic sensor support 5, a magnetic sensor 6, a magnetic shielding pipeline 7, a data acquisition component 8, and a signal source 9. A power amplifier 10 and a data synchronization source 11 . Wherein: the outer wall of one side of the magnetic shielding room 1 is provided with a magnetic shielding pipeline 7 passing through the outer wall, the central area of the magnetic shielding room 1 is placed with the Helmholtz coil 2, and the central area of the Helmholtz coil 2 is placed The measured o...
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The invention provides a device and method for measuring a weak eddy magnetic field, and the device and method are used for measuring an eddy magnetic field of a to-be-measured object. The device includes a shielding chamber. The shielding chamber is provided internally with a Helmholtz coil, a to-be-measured object support table and a magnetic sensor. The shielding chamber is provided externally with a data synchronization source, a signal source, a power amplifier and a data acquisition unit. The to-be-measured support table is located in a magnetic field uniform region of the Helmholtz coil. The signal source and the power amplifier are connected sequentially in series between the data synchronization source and the Helmholtz coil. The data acquisition unit is connected between the data synchronization source and the magnetic sensor. According to the invention, the measurement precision of the eddy magnetic field is improved, the measurement steps of the eddy magnetic field are simplified, and the eddy magnetic field of a large size system can be precisely measured as a whole.
Description
technical field [0001] The invention relates to the field of magnetic field measurement, in particular to a device and method for measuring a weak eddy current magnetic field. Background technique [0002] The aeronautical superconducting full tensor magnetic gradient measurement system is equipped with magnetic measurement equipment on the aerial platform, and uses the geomagnetic anomaly information caused by magnetic mineral resources obtained during the flight, so as to realize high-efficiency and high-precision measurement of underground magnetic ore bodies. Three-dimensional positioning, and obtain their spatial distribution information. It has the characteristics of high detection efficiency and low operating cost per unit area, and is one of the important means for resource census and screening of prospecting target areas. [0003] Due to factors such as radio frequency shielding, electromagnetic compatibility, and mechanical processability, there are more or less m...
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IPC IPC(8): G01R33/06G01V3/40
CPCG01R33/06G01V3/40
Inventor 伍俊荣亮亮邱隆清裴易峰冯涛蒋坤王士良谢晓明
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI