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Non-contact spherical metal conductor characteristic parameter measurement method based on electromagnetic eddy current detection

An electromagnetic eddy current and metal conductor technology, which is applied in the directions of electromagnetic measuring devices, electrical/magnetic diameter measurement, electrical/magnetic thickness measurement, etc., can solve problems such as high limitations, harsh test environment requirements, and difficulty in achieving extensive testing.

Active Publication Date: 2021-08-13
浙江浙能数字科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the existing metal sphere size measurement technologies are based on optical methods such as optical path layout or Fizeau interference to achieve non-contact measurement of the metal sphere radius. The advanced metal sphere size measurement technology not only has high cost of testing tools, but also can only calculate the radius after detecting the spherical contour, and cannot detect the wall thickness of the spherical element, evaluate the parameter information such as the thickness of the metal sphere surface layer, electrical conductivity, and magnetic permeability.
In industrial applications, the limitations are high, and the test environment is demanding, making it difficult to achieve extensive testing

Method used

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  • Non-contact spherical metal conductor characteristic parameter measurement method based on electromagnetic eddy current detection
  • Non-contact spherical metal conductor characteristic parameter measurement method based on electromagnetic eddy current detection
  • Non-contact spherical metal conductor characteristic parameter measurement method based on electromagnetic eddy current detection

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Embodiment 1

[0076] Such as figure 1 As shown, this embodiment uses a non-contact spherical metal conductor size measuring device based on electromagnetic eddy current detection to measure the size of the spherical metal conductor: the receiving coil is closer to the spherical metal conductor, such as Figure 6 to Figure 9 As shown, the distance between the lower plane of the receiving coil and the surface tangent plane of the spherical metal conductor is z, and the distance between the lower plane of the receiving coil and the horizontal axis of the spherical metal conductor is z 3 , the distance between the upper plane of the receiving coil and the horizontal axis of the spherical metal conductor is z 4 , the inner radius of the receiving coil is x 1 , the outer radius of the receiving coil is x 2 , the radius and thickness of the exciting coil are the same as the receiving coil, and the distance between the lower plane of the exciting coil and the horizontal axis of the spherical met...

Embodiment 2

[0081] On the basis of Embodiment 1, the non-contact spherical metal conductor characteristic parameter measurement method based on electromagnetic eddy current detection comprises the following steps:

[0082] Step 1, connect the output port of the impedance analyzer 2 to both ends of the exciting coil 4, and connect the receiving port of the impedance analyzer 2 to the two ends of the receiving coil 3;

[0083] Step 2, the output port of impedance analyzer 2 produces alternating current, the digital synthesis module of FPGA module in impedance analyzer 2 produces excitation signal, provides the excitation source of electromagnetic eddy current signal to excitation coil 4; Excitation coil 4 produces electromagnetic eddy current signal, The electromagnetic eddy current signal is transmitted to the receiving coil 3 through the surface of the spherical metal conductor 5 of the sample to be tested; the receiving coil 3 receives the electromagnetic eddy current signal and the chang...

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Abstract

The invention relates to a non-contact spherical metal conductor characteristic parameter measurement method based on electromagnetic eddy current detection. The method comprises the steps of connecting an output port of an impedance analyzer to two ends of a magnet exciting coil, and connecting a receiving port of the impedance analyzer to two ends of a receiving coil; enabling an output port of the impedance analyzer to generate alternating current, enabling a digital synthesis module of an FPGA module in the impedance analyzer to generate an excitation signal, and providing an excitation source of an electromagnetic eddy current signal for the magnet exciting coil. The method has the beneficial effects that the skin effect that the electromagnetic eddy current signal is only transmitted on the near surface of the pipe wall is utilized, and a single-frequency electromagnetic eddy current detection technology is combined, so that nonlinear change caused by a lift-off effect can be inhibited, and high-precision and high-performance related parameter detection on a spherical metal conductor in the industry is realized, for example, the thickness of a metal conductor plane is detected. The method is mainly suitable for spherical metal pieces which have high precision requirements and must be subjected to nondestructive detection.

Description

technical field [0001] The invention belongs to the technical field of non-contact size measurement by using electromagnetic eddy current, and in particular relates to a non-contact method for measuring characteristic parameters of spherical metal conductors based on electromagnetic eddy current detection. Background technique [0002] Spherical metal conductors are widely used in industrial production processes. Metal spheres can be used as bearings for robots, airplanes, automobiles and medical shavings, and can also be used as transportation or storage containers for gas and oil. In addition, the hollow metal sphere shell is also useful for shielding electromagnetic interference. important role. The safety of the metal sphere is largely determined by the size of the sphere and the integrity of the surface. Therefore, a non-destructive, non-contact size measurement technology for the metal sphere is required in the industry. [0003] Most of the existing metal sphere size...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/06G01B7/12G01N27/72
CPCG01B7/10G01B7/12G01N27/72
Inventor 金仲文秦刚华郑渭建熊磊李炳辰许云良
Owner 浙江浙能数字科技有限公司