Intelligent detection device based on pulsed eddy current
A technology of intelligent detection and pulsed eddy current, which is used in measurement devices, instruments, scientific instruments, etc., can solve the problems of difficult to achieve optimal design among multiple frequencies, difficult to obtain the objective function of expression, etc., to reduce errors and achieve high-precision detection. , the effect of expanding the detection range
Pending Publication Date: 2020-06-30
NANJING UNIV OF SCI & TECH
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Problems solved by technology
[0005] For pulsed eddy current testing, since the excitation signal contains multiple frequencies, it is difficult to obtain a clearly expressed objective function, especially the traditional optimal design between multiple frequencies is difficult to achieve
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[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0026] 1. The overall situation of the device
[0027] 1) An intelligent detection device based on pulsed eddy current, which consists of: a combined array probe 1, an intelligent control module 2, an excitation source 3, a signal processing module 4, a power supply module 5, and a virtual instrument 6. The intelligent control module 2 is connected with the virtual instrument 6 and simultaneously controls the combined array probe 1 and the excitation source 3 . Such as figure 1 shown.
[0028] 2) The control core of the intelligent control module 2 is a 32-bit microprocessor, which accepts input signals from the measured depth of the tested piece and the material properties of the tested piece from the virtual instrument 6. The microprocessor has a built-in optimization algorithm, and the microprocessor The output signal is to control the o...
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Abstract
The invention discloses an intelligent detection device based on pulsed eddy current, which comprises a combined array type probe (1), an intelligent control module (2), an excitation source (3), a signal processing module (4), a power supply module (5) and a virtual instrument (6), and is characterized in that the intelligent control module (2) is connected with the virtual instrument (6) and controls the combined array type probe (1) and the excitation source (3) simultaneously. The technical effects of the invention are as follows: 1) the combined array type probe is adopted to enlarge thedetection range of the detection device and improve the detection precision; 2) the frequency of the excitation source, the coil probe and the distance between the probe and the detected surface are automatically selected by adopting the intelligent control module, so that the frequency of the excitation source is optimally matched with the coil probe, and the detection precision can be further improved; and 3) an intelligent control module is adopted, so that the detection device can automatically realize high-precision detection, and human errors are reduced to the maximum extent.
Description
technical field [0001] The invention belongs to the field of pulsed eddy current detection, in particular to an intelligent detection device of pulsed eddy current. Background technique [0002] As a kind of eddy current testing technology, pulsed eddy current testing technology is based on the principle of electromagnetic induction, and is used in metal materials. The principle of pulsed eddy current testing is basically the same as that of traditional eddy current testing. The main difference lies in the different excitation methods and signal analysis methods. . [0003] In eddy current testing, coils are often used as probes, and their shape and size will determine the sensitivity and detection range of the probe. In order to improve the performance of the pulsed eddy current detection probe, it is often desired to obtain a larger detection range and higher sensitivity. To obtain a larger range, the axial distribution of the exciting magnetic field must be increased; a...
Claims
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Login to View More IPC IPC(8): G01N27/90G01N27/904
CPCG01N27/90G01N27/9006
Inventor 孙炜
Owner NANJING UNIV OF SCI & TECH