A new type of industrial multifunctional pulsed eddy current probe

Abstract

The application discloses a novel industrial multifunctional pulse eddy current probe and relates to the technical field of pulse eddy current detection.The probe shell is internally provided with excitation assemblies and a Hall sensor.The excitation assemblies are in multiple groups, the Hall sensor is arranged at the center of the excitation assemblies, and the excitation assemblies are arranged in a circumferential array around the Hall sensor.The application is not easily disturbed by other magnetic fields or electric fields in the surrounding environment, can reduce signal fluctuation and errors caused by external interference to a certain extent, and improves the reliability and stability of probe detection.

Description

Technical Field

[0001] This application relates to the field of pulsed eddy current detection technology, specifically to a novel industrial multifunctional pulsed eddy current probe. Background Technology

[0002] Pulsed eddy current testing technology is based on the principle of electromagnetic induction. When a pulsed current passes through a coil in the probe, it generates a rapidly decaying pulsed magnetic field. This magnetic field penetrates the coating of the object being tested, inducing pulsed eddy currents inside the conductor. These eddy currents diffuse within the conductor, generating a secondary magnetic field opposite to the excitation magnetic field. The receiving sensor in the probe detects the voltage induced by this secondary magnetic field. If defects exist inside the conductor, such as corrosion or cracks, they will affect the distribution and intensity of the eddy currents, thus causing a change in the induced voltage on the receiving sensor. By measuring and analyzing the induced voltage, internal information about the object being tested can be obtained, such as wall thickness, defect location, and size.

[0003] However, pulsed eddy current probes still have shortcomings in practical testing applications, such as internal interference in the excitation coil, which can lead to a decrease in testing accuracy. Utility Model Content

[0004] The main objective of this application is to provide a novel industrial multifunctional pulsed eddy current probe, which aims to solve the aforementioned technical problems.

[0005] The technical solution adopted in this application is as follows:

[0006] A novel industrial multifunctional pulsed eddy current probe includes a probe housing, inside which are arranged excitation components and Hall sensors. There are multiple sets of excitation components, and the Hall sensors are arranged at the center of the excitation components. The excitation components are arranged in a circumferential array around the Hall sensors.

[0007] Optionally, the excitation assembly includes a magnetic core and an excitation coil wound around the magnetic core.

[0008] Optionally, the inner diameter of the excitation coil is 10mm to 15mm, the outer diameter is 20mm to 25mm, the number of turns is 200 to 250, and the wire diameter is 0.2mm to 0.5mm.

[0009] Optionally, the probe housing includes a pulsed eddy current upper shell, a pulsed eddy current intermediate shell, and a pulsed eddy current bottom shell, with the pulsed eddy current intermediate shell located between the pulsed eddy current upper shell and the pulsed eddy current bottom shell, and the three are coaxially arranged.

[0010] The pulsed eddy current bottom shell encapsulates the pulsed eddy current intermediate shell within the pulsed eddy current upper shell.

[0011] Optionally, the pulsed eddy current chamber is provided with cavities for mounting the Hall sensor and the excitation assembly.

[0012] Optionally, the pulsed eddy current upper shell is provided with an external source interface.

[0013] Optionally, the pulsed eddy current upper shell, pulsed eddy current intermediate shell, and pulsed eddy current bottom shell are 3D printed using high-temperature corrosion-resistant materials.

[0014] Optionally, the high-temperature corrosion-resistant material is a photosensitive resin.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] This application proposes a novel industrial multifunctional pulsed eddy current probe. It employs a circumferential array of multiple excitation components surrounding a Hall sensor, unlike the traditional layered arrangement. This optimized arrangement allows the Hall sensor to more effectively receive vertical magnetic field signals, enabling efficient detection of magnetic field changes, improving detection sensitivity and accuracy. Furthermore, it ensures relatively stable magnetic field coupling between the excitation coil and the Hall sensor, making it less susceptible to interference from other magnetic or electric fields in the surrounding environment. This reduces signal fluctuations and errors caused by external interference to a certain extent, improving the reliability and stability of the probe's detection. Attached Figure Description

[0017] Figure 1 An exploded view of the novel industrial multifunctional pulsed eddy current probe provided in the embodiments of this application;

[0018] Figure 2 A cross-sectional view of the novel industrial multifunctional pulsed eddy current probe provided in the embodiments of this application.

[0019] Explanation of the labels in the attached drawings:

[0020] 1-External source interface, 2-Magnetic core rod, 3-Excitation coil, 4-Pulse eddy current upper shell, 5-Pulse eddy current middle shell, 6-Pulse eddy current bottom shell, 7-Hall sensor. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0025] See attached document Figures 1 to 2 The present application provides a novel industrial multifunctional pulsed eddy current probe, including a probe housing. Inside the probe housing are excitation components and Hall sensors 7. Multiple sets of excitation components are used to generate an excitation magnetic field inside the probe during detection. The Hall sensors 7 are located at the center of the excitation components, which are arranged in a circumferential array around the Hall sensors 7. Compared to the traditional layered arrangement of excitation components, the optimized arrangement allows the Hall sensors 7 to more effectively receive vertical magnetic field signals, efficiently detect magnetic field changes, improve detection sensitivity and accuracy, and ensure relatively stable magnetic field coupling between the excitation coil 3 and the Hall sensors 7. This makes them less susceptible to interference from other magnetic or electric fields in the surrounding environment, reducing signal fluctuations and errors caused by external interference to a certain extent, and improving the reliability and stability of the probe detection.

[0026] In this embodiment, the excitation assembly includes a magnetic core rod 2 and an excitation coil 3. The excitation coil 3 is wound around the magnetic core rod 2. The probe housing includes a pulsed eddy current upper shell 4, a pulsed eddy current intermediate shell 5, and a pulsed eddy current bottom shell 6. The pulsed eddy current intermediate shell 5 is provided with cavities for correspondingly installing the Hall sensor 7 and the excitation assembly. The Hall sensor 7 is horizontally placed at the center of the pulsed eddy current bottom shell 6. The magnetic core rod 2 is formed on the pulsed eddy current bottom shell 6. The excitation coil 3 is wound around the magnetic core rod 2. The two ends of the pulsed eddy current intermediate shell 5 have stepped portions for forming an interference fit with the pulsed eddy current upper shell 4 and the pulsed eddy current bottom shell 6. The pulsed eddy current bottom shell 6 is encapsulated at the bottom of the pulsed eddy current intermediate shell 5. The Hall sensor 7 and the excitation assembly are inserted into the cavity of the pulsed eddy current intermediate shell 5.

[0027] In the above-described configuration, the pulsed eddy current upper shell 4 is equipped with an external interface 1. This external interface 1 connects the probe to other parts of the pulsed eddy current detection system (such as the main unit and power supply) to achieve signal transmission and power supply. Simultaneously, the pulsed eddy current upper shell 4, the pulsed eddy current intermediate shell 5, and the pulsed eddy current bottom shell 6 are 3D printed from high-temperature corrosion-resistant materials. The material is selected from high-temperature photosensitive resin, giving it excellent mechanical strength and thermal stability. Compared to traditional pulsed eddy current probes, this pulsed eddy current probe is better suited to the harsh environments of factories.

[0028] In this embodiment, the parameters of the excitation coil 3, such as its inner diameter, outer diameter, height, number of turns, and wire diameter, are optimized. Unlike traditional pulsed eddy current probes, this pulsed eddy current probe employs a single-factor experiment: while keeping other parameters constant, the inner diameter, outer diameter, height, number of turns, wire diameter, and excitation frequency are changed sequentially. The signal amplitude and depth detection effect are measured and analyzed to determine the optimal range for each parameter. After parameter optimization, the inner diameter of the excitation coil 3 is 10mm–15mm, the outer diameter is 20mm–25mm, the number of turns is 200–250, and the wire diameter is 0.2mm–0.5mm. These optimized parameters maximize the signal amplitude and depth detection capability. The excitation coil 3 is wound with copper enameled wire. The coil shape and number of turns are optimized through finite element simulation to reduce internal electromagnetic interference. The Hall sensor 7 is a high-sensitivity, low-noise model (such as AH3503) and equipped with a flexible connection interface for easy installation and debugging under complex welding conditions.

[0029] In summary, the novel industrial multifunctional pulsed eddy current probe provided in this application embodiment can reduce electromagnetic interference inside the coil. The sensor is equipped with a flexible connection interface, which facilitates installation and debugging under complex welding conditions. The probe shell material is made of high-temperature resistant photosensitive resin, which has good mechanical strength and thermal stability and can adapt to the harsh environment of industrial sites.

[0030] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A novel industrial multifunctional pulsed eddy current probe, characterized in that, The device includes a probe housing, inside which are arranged excitation components and Hall sensors. There are multiple sets of excitation components, and the Hall sensors are located at the center of the excitation components. The excitation components are arranged in a circumferential array around the Hall sensors. The excitation components include a magnetic core rod and an excitation coil, with the excitation coil wound on the magnetic core rod. The probe housing includes a pulsed eddy current upper shell, a pulsed eddy current intermediate shell, and a pulsed eddy current lower shell. The pulsed eddy current intermediate shell is located between the pulsed eddy current upper shell and the pulsed eddy current lower shell, and the three are arranged coaxially.

2. The novel industrial multifunctional pulsed eddy current probe according to claim 1, characterized in that, The excitation coil has an inner diameter of 10mm to 15mm, an outer diameter of 20mm to 25mm, 200 to 250 turns, and a wire diameter of 0.2mm to 0.5mm.

3. The novel industrial multifunctional pulsed eddy current probe according to claim 1, characterized in that, The pulsed eddy current chamber is provided with cavities for mounting the Hall sensor and the excitation assembly.

4. The novel industrial multifunctional pulsed eddy current probe according to claim 1, characterized in that, The pulsed eddy current upper shell is provided with an external source interface.

5. The novel industrial multifunctional pulsed eddy current probe according to claim 1, characterized in that, The pulsed vortex upper shell, pulsed vortex intermediate shell, and pulsed vortex bottom shell are 3D printed using high-temperature corrosion-resistant materials.

6. The novel industrial multifunctional pulsed eddy current probe according to claim 5, characterized in that, The high-temperature corrosion-resistant material is a photosensitive resin.

Images