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Device and method for evaluating directions and depths of metal cracks by using ultrasonic electromagnetic principle

An ultrasonic electromagnetic and crack technology, which is used in measuring devices, material analysis by electromagnetic means, material magnetic variables, etc., can solve the problem of inability to evaluate the crack direction, and achieve the effect of rapid evaluation.

Active Publication Date: 2015-05-20
EDDYSUN (XIAMEN) ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-destructive testing methods such as ultrasonic or eddy current are usually used to detect cracks in metal material workpieces. Among them, eddy current testing methods are suitable for rapid detection of crack defects on the surface and near the surface of metal materials, but they cannot evaluate the direction of cracks; ultrasonic testing methods are mostly suitable for metal materials. Detection of internal defects
So far, there is no effective rapid detection and evaluation method for the direction and depth of cracks in metal materials

Method used

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  • Device and method for evaluating directions and depths of metal cracks by using ultrasonic electromagnetic principle
  • Device and method for evaluating directions and depths of metal cracks by using ultrasonic electromagnetic principle
  • Device and method for evaluating directions and depths of metal cracks by using ultrasonic electromagnetic principle

Examples

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no. 1 example

[0022] The first embodiment, such as figure 1 As shown, the device for evaluating the direction and depth of metal cracks using the ultrasonic electromagnetic principle adopts an eddy current detection point probe E and two ultrasonic detection oblique probes U1, U2 to make a combined probe scanning device, and the two ultrasonic detection oblique probes U1, U2 The incident angle θ, frequency, material, and shape of U2 are the same, and the incident angle θ is a fixed value. The two ultrasonic testing oblique probes U1 and U2 are mirror-symmetrically fixed, so that the ultrasonic waves emitted by the two ultrasonic testing oblique probes U1 and U2 are mirror-symmetrical. Intersect; the eddy current detection point probe E is placed in the middle of the two ultrasonic detection angle probes U1 and U2.

[0023] The first embodiment, such as figure 2 , image 3 , Figure 4 , Figure 5 As shown, the method of evaluating the direction and depth of metal cracks using the ultras...

no. 2 example

[0028] Second embodiment, such as Image 6 As shown, the device for evaluating the direction and depth of metal cracks by using the ultrasonic electromagnetic principle, further, the array eddy current detection probe AE is used to replace the eddy current detection point probe E in the combined probe scanning device. The method of evaluating the trend and depth of metal cracks using ultrasonic electromagnetic principles, further, after performing steps a and b, in step c, when the array eddy current detection probe AE just reaches the top of the crack opening, the crack eddy current induction signal amplitude E V reaches the maximum value, according to the crack eddy current induction signal amplitude E obtained in step a V , phase and crack depth calibration relationship function to calculate the crack depth equivalent relative to the standard artificial crack; When the surface trend of the crack in material 1 is not perpendicular to the scanning direction of the combined p...

no. 3 example

[0029] In the third embodiment, the method for evaluating the trend and depth of metal cracks using ultrasonic electromagnetic principles, further, after performing step a, step b, and step c, in step d, according to the frequency of the ultrasonic detection angle probe U1, U2 and the wafer The area is calculated to obtain the diffusion angle of the ultrasonic testing angled probes U1 and U2, combined with the time value t of the echo signal of the two ultrasonic testing angled probes U1 and U2 obtained in step a when encountering a crack 1 , t 2 A relatively accurate crack inclination angle can be obtained by calculating the calibration relationship function with the inclination angle of the crack.

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Abstract

The invention discloses a device and a method for evaluating directions and depths of metal cracks by using an ultrasonic electromagnetic principle. An ultrasonic and vortex combined detection method is adopted, and a vortex detection probe and two ultrasonic detection inclined probes are used for manufacturing a combined probe scanning device; a vortex method is used for positioning a surface crack opening position of a metal material and evaluating a crack depth equivalent weight; and an ultrasonic method is used for evaluating a crack depth direction and the crack depth equivalent weight, so that the difficulty that the condition of rapidly evaluating the crack depth direction and the crack depth equivalent weight of the metal material, which cannot be realized until now, is effectively overcome.

Description

[0001] The invention relates to a non-destructive testing method, in particular to a device and a method for evaluating the direction and depth of metal cracks by using the ultrasonic electromagnetic principle. Background technique [0002] Detecting and evaluating the depth and direction of cracks in metal material workpieces is the primary method to ensure the safe operation of metal material workpieces in service and avoid accidents. When the crack develops to a certain extent, it will affect the safety of the rail, and rail fracture accidents are very prone to occur. Among them, inclined cracks are particularly dangerous. Different crack directions and depths have great impact on rail safety. The degree of influence varies. Non-destructive testing methods such as ultrasonic or eddy current are usually used to detect cracks in metal material workpieces. Among them, eddy current testing methods are suitable for rapid detection of crack defects on the surface and near the sur...

Claims

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Application Information

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IPC IPC(8): G01N27/90G01N27/904
Inventor 林俊明
Owner EDDYSUN (XIAMEN) ELECTRONICS CO LTD
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