A phased array ultrasonic nondestructive testing device and method for angle steel detection

Abstract

The application relates to the technical field of ultrasonic nondestructive testing, and discloses a phased array ultrasonic nondestructive testing device and method for angle steel detection. In view of the problems of complex geometric structure of the top corner area of the angle steel and large detection blind area, combined detection of a double linear array phased array ultrasonic probe is carried out through double linear scanning and double fan scanning, the single scanning range of the focused sound beam covers the whole top corner area of the angle steel, and adaptive adjustment of a sound beam signal acquisition gate is realized based on the geometric contour of the angle steel. During the detection process, the double linear array phased array ultrasonic probe synchronously and instantaneously collects ultrasonic detection signals along the length direction of the angle steel under the driving of an electromagnetic mobile scanner; combined with a detection and analysis software platform, data imaging processing is carried out on the collected signals, and the visualization identification, accurate positioning and size quantitative characterization of internal defects of the angle steel are realized. The application can effectively improve the coverage range, detection efficiency and imaging precision of internal defect detection of the L-shaped angle steel, and is suitable for high-reliability nondestructive testing of angle steel components.

Description

Technical Field

[0001] This invention belongs to the field of ultrasonic nondestructive testing technology, specifically relating to a phased array ultrasonic nondestructive testing device and method for testing angle steel. Background Technology

[0002] Angle steel is a commonly used steel profile with an "L"-shaped cross-section. It mainly includes equal-sided and unequal-sided angle steel, and is widely used in power transmission towers, steel structure bridges, large-scale construction projects, and various industrial structures. Because it typically occupies a critical load-bearing position in load-bearing structures, the internal quality of angle steel products directly affects the safety and service life of the overall structure. Therefore, effective detection of internal defects during the manufacturing and service of angle steel is of great significance.

[0003] In actual production, L-shaped angle steel is inevitably prone to defects such as porosity, air pockets, inclusions, cracks, or delamination due to factors such as fluctuations in the quality of raw material billets, changes in rolling and forming process parameters, and uneven cooling conditions. These defects are mostly located in stress concentration areas near the apex of the angle steel, and are characterized by their high degree of concealment and difficulty in visual identification. Once they expand during service, they may cause structural failure or safety accidents. Therefore, non-destructive testing of internal defects in angle steel has always been a key focus in the steel manufacturing and engineering application fields.

[0004] Existing non-destructive testing (NDT) technologies for angle steel inspection mainly include magnetic particle testing, radiographic testing, and conventional ultrasonic testing. Magnetic particle testing is typically suitable for detecting surface or near-surface defects in ferromagnetic materials, but its ability to detect deep internal defects is limited. While radiographic testing can be used for internal structural imaging, the equipment is expensive, requires strict environmental conditions, and suffers from limitations in imaging resolution and efficiency when inspecting thick-section components. Conventional ultrasonic testing typically employs a single-probe point-by-point scanning method, which has limitations in inspection efficiency, coverage, and adaptability to complex structures.

[0005] Furthermore, the cross-section of L-shaped angle steel is not a simple planar structure; its inner corner is typically a rounded transition area. This geometric feature makes it easy for ultrasonic waves to undergo multiple reflections, refractions, and mode conversions during propagation within the material, increasing problems such as uneven beam coverage and complex signal interpretation. Under these circumstances, traditional detection methods often struggle to balance detection coverage with defect identification accuracy, and some areas may suffer from insufficient detection sensitivity or incomplete imaging information.

[0006] With the development of phased array ultrasonic testing technology, this technology has been gradually introduced into the field of non-destructive testing of steel structural components due to its characteristics such as controllable sound beam, flexible focusing, and high scanning efficiency. However, in practical applications for structurally complex components such as L-shaped angle steel, existing testing schemes are still mostly based on a single probe or a single scanning mode, which limits the versatility and specificity of the testing schemes. Furthermore, there is still room for improvement in sound beam coverage, data imaging, and defect quantification in complex geometric areas.

[0007] Therefore, how to effectively cover key areas such as the top corner of L-shaped angle steel without increasing the complexity of detection, and obtain stable and reliable internal defect detection information, remains a problem that needs to be continuously focused on and studied in this technical field. Summary of the Invention

[0008] The purpose of this invention is to solve the problems in the prior art where the complex structure and arc transition of the angle steel apex area result in a limited scanning range of phased array ultrasonic testing, a large blind zone, and insufficient defect identification and quantification capabilities.

[0009] The objective of this invention is achieved through the following technical solution:

[0010] A phased array ultrasonic non-destructive testing device for inspecting angle steel, the device comprising:

[0011] The first probe moving unit is attached to the back of one leg of the angle steel to be tested during detection.

[0012] The second probe moving unit is connected to the first probe moving unit through a hinge structure and is attached to the back of the other leg of the angle steel to be tested during detection.

[0013] The first linear phased array ultrasonic probe is fixed to one side of the first probe moving unit;

[0014] The second linear phased array ultrasonic probe is fixed to one side of the second probe moving unit;

[0015] The host is electrically connected to the first linear array phased array ultrasonic probe, the second linear array phased array ultrasonic probe, the first probe moving unit, and the second probe moving unit via cables. The host has a built-in detection and analysis software platform for processing the ultrasonic echo signals received by the first linear array phased array ultrasonic probe and the second linear array phased array ultrasonic probe and generating imaging results of the inside of the angle steel.

[0016] The power supply is electrically connected to the first probe moving unit and the second probe moving unit.

[0017] The detection and analysis software platform is configured to perform combined linear and sector scanning of the sound beam based on the geometry of the angle steel, so that the single scan range of the focused sound beam covers the top corner area of ​​the angle steel.

[0018] Preferably, the first probe moving unit and the second probe moving unit are electromagnetic moving scanners.

[0019] Preferably, the hinge structure has built-in wires.

[0020] Preferably, the host is a portable all-in-one machine.

[0021] Preferably, both the first probe moving unit and the second probe moving unit integrate encoders to obtain probe movement displacement information.

[0022] Preferably, the detection and analysis software platform includes a two-dimensional fusion imaging module for ultrasonic echo data and a real-time three-dimensional fusion imaging module for ultrasonic volume data.

[0023] Based on the same inventive concept, this invention also provides a phased array ultrasonic nondestructive testing method for angle steel inspection, employing the aforementioned phased array ultrasonic nondestructive testing device for angle steel inspection, the method comprising the following steps:

[0024] Initialize the detection and analysis software platform based on the geometric dimensions and material acoustic parameters of the angle steel to be tested;

[0025] The first probe moving unit and the second probe moving unit are respectively arranged on the back of the two limbs on the outer side of the top corner of the angle steel;

[0026] The first linear phased array ultrasonic probe and the second linear phased array ultrasonic probe are controlled to perform linear scanning and sector scanning while moving along the length of the angle steel.

[0027] The ultrasonic echo signals received by the first linear phased array ultrasonic probe and the second linear phased array ultrasonic probe are collected.

[0028] The ultrasonic echo signal is post-processed using a detection and analysis software platform to generate two-dimensional and three-dimensional internal structure images of the angle steel.

[0029] The detection and analysis software platform identifies different types of defects inside angle steel based on color differences and known defect characteristics displayed in the internal structure images.

[0030] Preferably, when initializing the detection and analysis software platform, the sound beam propagation path is modeled based on the arc structure of the top corner region of the angle steel.

[0031] Preferably, when acquiring ultrasonic echo signals, the acoustic beam signal acquisition gate is adaptively adjusted according to the geometric profile of the angle steel.

[0032] Preferably, the linear scanning and sector scanning specifically include: based on the geometry of the angle steel to be inspected, the detection and analysis software platform controls the first linear array phased array ultrasonic probe and the second linear array phased array ultrasonic probe to form a linear scanning beam propagating along the back of the angle steel in a linear scanning manner, and to form a sector scanning beam covering the top corner area of ​​the angle steel in a sector scanning manner, so that the linear scanning beam and the sector scanning beam are superimposed in space, thereby enabling the single scan range of the focused beam to cover the top corner area of ​​the angle steel.

[0033] Preferably, the acoustic beam signal acquisition gate is distributed in an arc shape in the sector scanning mode.

[0034] Preferably, based on the generated two-dimensional and three-dimensional imaging results, the internal defects of the angle steel are spatially located and the geometric dimension information of the defects is obtained.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] This invention has achieved significant technical benefits in terms of coverage, reliability, and interpretability of non-destructive testing of internal defects in angle steel.

[0037] Firstly, this invention addresses the structural characteristics of angle steel, which features a rounded transition and complex acoustic boundaries within the angle steel's apex corner area. It employs a dual-linear array phased array ultrasonic probe positioned side-by-side on the outer side of the angle steel's apex corner. Through a combined "dual-linear scan + dual-fan scan" method, the sound beam enters the angle steel from different incident angles and propagation paths. The technical principle lies in the fact that phased array ultrasound, through precise control of the excitation delay of each array element, achieves linear scanning and fan-shaped deflection scanning of the sound beam, thereby forming a multi-angle, multi-path sound field coverage in space. When the dual-linear array probes operate simultaneously and perform superimposed linear and fan scans, it effectively reduces sound beam obstruction, reflection distortion, or energy attenuation caused by a single incident angle, resulting in a more uniform and continuous coverage area of ​​ultrasonic energy in the angle steel's apex corner region. The direct technical effect is that the focused sound beam can essentially cover the entire apex corner region of the angle steel in a single scan, significantly reducing blind spots and increasing the probability of detecting internal defects.

[0038] Secondly, this invention introduces an adaptive calculation mechanism for the acoustic beam signal acquisition gate based on the geometric contour of the angle steel in the detection scheme design. The principle is that, unlike the traditional fixed gate method, this invention comprehensively considers the acoustic beam propagation path, the position of the arc surface boundary of the angle steel's apex, and the spatial distribution characteristics of the sector scan area when setting the signal acquisition gate, allowing the gate shape to match and adjust with the geometric changes of the detection area. Through this adaptive gate setting, while ensuring the complete acquisition of effective echo signals, interference from reflected signals from non-target areas and structural noise can be suppressed. The corresponding technical effects are an improved signal-to-noise ratio and a more obvious contrast of the defect echo in the imaging results, thus facilitating defect identification and interpretation under complex structural conditions.

[0039] Furthermore, this invention uses an electromagnetic mobile scanner to drive a dual-linear phased array ultrasonic probe to move synchronously along the length of the angle steel, and combines this with an encoder's automatic distance counting function to achieve precise correspondence between spatial position information and ultrasonic echo data during the detection process. The technical principle lies in mapping the probe's displacement information into the detection data in real time, so that the ultrasonic signal not only includes amplitude and time information but also establishes a correspondence with specific spatial coordinates. Based on this, and with the phased array ultrasonic detection and analysis software platform, multi-channel data can be fused and processed to reconstruct two-dimensional and three-dimensional imaging results of internal defects in the angle steel. The resulting technical effect is that defects are no longer presented only as a single A-scan or B-scan signal, but rather their spatial position, morphology, and size are intuitively displayed in a visual image format, providing a reliable basis for subsequent qualitative and quantitative analysis of defects.

[0040] Furthermore, this invention integrates the ultrasonic signal excitation receiving board and the detection and analysis software platform into a portable all-in-one machine, enabling detection, data processing, and imaging analysis to be completed on the same device. The principle behind this is to reduce uncertainties in data transmission links and system interfaces, thereby ensuring the synchronization and consistency of multi-channel phased array data. The resulting technical effects are a more stable and efficient detection process, stronger adaptability to field applications, and the ability to meet the practical needs of engineering sites for detection efficiency and result reliability.

[0041] In summary, this invention achieves high coverage and high reliability detection of internal defects in the apex region of L-shaped angle steel by combining dual-linear phased array ultrasonic probes for joint scanning, adaptive gate setting, synchronous moving scanning, and two-dimensional and three-dimensional fusion imaging. This significantly improves the practical value and engineering applicability of non-destructive testing of complex angle steel components. Attached Figure Description

[0042] Figure 1 This is a flowchart of a phased array ultrasonic nondestructive testing device and method for inspecting angle steel according to the present invention;

[0043] Figure 2 Here is a simplified flowchart of the detection method of the present invention;

[0044] Figure 3 This is a schematic diagram of linear scanning according to the present invention;

[0045] Figure 4 This is a schematic diagram of the sector scanning of the present invention.

[0046] Figure 5 This is a schematic diagram of the "dual-line scan + dual-sector scan" joint detection scheme and the acoustic beam signal acquisition gate of the dual-linear phased array ultrasonic probe of the present invention.

[0047] Figure 6 This is a schematic diagram of the two-dimensional imaging results of the "dual-line scanning + dual-sector scanning" combined detection method of the present invention;

[0048] Figure 7 This is a schematic diagram of the three-dimensional imaging results of the "dual-line scanning + dual-sector scanning" combined detection method of the present invention;

[0049] In the diagram: 1. Angle steel; 2-1. First linear array phased array ultrasonic probe; 2-2. Second linear array phased array ultrasonic probe; 3-1. First probe moving unit; 3-2. Second probe moving unit; 3-3. Junction box; 4. Power supply; 5. Power cord; 6. Encoder data cable; 7. Ultrasonic probe data cable; 8. Main unit; 9-1. Longitudinal linear scan area; 10-1. Lateral linear scan area; 11-1. Longitudinal sector scan area; 12-1. Lateral sector scan area; 9-2. Longitudinal linear scan acquisition gate; 10-2. Lateral linear scan acquisition gate; 11-2. Longitudinal sector scan acquisition gate; 12-2. Lateral sector scan acquisition gate; 9-3. Longitudinal linear scan acquisition adaptive gate; 10-3. Lateral linear scan acquisition adaptive gate; 11-3. Longitudinal sector scan acquisition adaptive gate; 12-3. Lateral sector scan acquisition adaptive gate; 13. "Dual linear scan + dual sector scan" area; 14. Scanning blind spot. Detailed Implementation

[0050] The technical solution will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding the content of the present invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0051] Example 1

[0052] like Figure 1 As shown, a phased array ultrasonic non-destructive testing device for inspecting angle steel includes:

[0053] The first probe moving unit 3-1 is attached to the back of one leg of the angle steel 1 to be tested during detection.

[0054] The second probe moving unit 3-2 is connected to the first probe moving unit 3-1 through a hinge structure, and is adsorbed onto the back of the other limb of the angle steel 1 to be tested during detection.

[0055] The first linear phased array ultrasonic probe 2-1 is fixed to one side of the first probe moving unit 3-1.

[0056] The second linear phased array ultrasonic probe 2-2 is fixed to one side of the second probe moving unit 3-2.

[0057] The host 8 is electrically connected to the first linear phased array ultrasonic probe 2-1, the second linear phased array ultrasonic probe 2-2, the first probe moving unit 3-1, and the second probe moving unit 3-2 via cables. The host 8 has a built-in detection and analysis software platform for processing the ultrasonic echo signals received by the first linear phased array ultrasonic probe 2-1 and the second linear phased array ultrasonic probe 2-2 and generating imaging results of the inside of the angle steel.

[0058] The host 8 is connected to the hub box 3-3 via the encoder data cable 6, and then connected to the first probe moving unit 3-1 and the second probe moving unit 3-2 via internal wiring.

[0059] The host 8 is connected to the first linear phased array ultrasonic probe 2-1 and the second linear phased array ultrasonic probe 2-2 via the ultrasonic probe data cable 7 to enable power supply and signal acquisition for the two ultrasonic probes.

[0060] Power supply 4 is electrically connected to the first probe moving unit 3-1 and the second probe moving unit 3-2 via power cable 5.

[0061] The detection and analysis software platform is configured to perform combined linear and sector scanning of the sound beam based on the geometry of the angle steel, so that the single scan range of the focused sound beam covers the top corner area of ​​the angle steel.

[0062] The first probe moving unit and / or the second probe moving unit are electromagnetic moving scanners. Both probe moving units can use electromagnetic moving scanners simultaneously, or one of them can be an electromagnetic moving scanner. When only one probe moving unit is an electromagnetic moving scanner, the other probe moving unit is a driven component. From the perspective of reliability, stability, or implementation difficulty, it is most reliable and easy to use electromagnetic moving scanners for both the first probe moving unit and the second probe moving unit.

[0063] The hinge structure has built-in wires for electrical connection between the second probe moving unit 3-2 and the power supply 4, and for data connection between the second probe moving unit 3-2 and the host 8.

[0064] Preferably, the host 8 is a portable all-in-one computer, which is a computer that highly integrates the host, screen, and battery, combining the simplicity of a desktop all-in-one computer with the portability of a laptop. It requires no complex wiring, has a built-in battery for use anywhere, and is equipped with a touchscreen. Portable all-in-one computers for engineering control are ruggedized mobile workstations specifically designed for industrial scenarios. They integrate the host, touchscreen, and battery, possessing industrial protection levels such as dustproof, waterproof, shockproof, and temperature resistant, and provide rich professional interfaces (such as serial ports and network ports). They can operate stably in complex environments such as workshops and fields, enabling equipment monitoring, data acquisition, and on-site debugging.

[0065] Both the first probe moving unit 3-1 and the second probe moving unit 3-2 integrate encoders to obtain probe movement displacement information. A hub box 3-3 is located at the rear end of the first probe moving unit 3-1 to collect the power and data cables of the first probe moving unit 3-1 and the second probe moving unit 3-2, and also facilitates connection between the host 8 and the power supply 4. For ease of carrying and maintenance, the host 8 and the power supply 4 can be quickly connected via connectors on the hub box 3-3.

[0066] The detection and analysis software platform includes a two-dimensional fusion imaging module for ultrasonic echo data and a real-time three-dimensional fusion imaging module for ultrasonic body data.

[0067] A typical angle steel inspection process is as follows: Figure 2 As shown, the specific process is as follows:

[0068] One L-shaped angle steel sample with dimensions of ∠250mm (limb width) × 24mm (limb thickness) × 2000mm (length) and made of Q420C was selected as the test object, with a density of 7.85g / cm³. 3 The longitudinal wave velocity is 5900 m / s, the transverse wave velocity is 3200 m / s, and the radius of the inner arc surface of the apex corner region is 24 mm.

[0069] (1) Detection scheme design

[0070] Based on the physical parameters of the L-shaped angle steel sample being tested, such as geometric dimensions, material density, and acoustic wave velocity within the material, two linear phased array ultrasonic probes with a center frequency of 5MHz, 128 linear array elements, an element spacing of 0.5mm, and an element length of 10mm were selected as the first linear phased array ultrasonic probe 2-1 and the second linear phased array ultrasonic probe 2-2, each equipped with a conventional ultrasonic testing flat wedge. A customized "dual-linear scan + dual-sector scan" joint testing scheme for the dual-linear phased array ultrasonic probes was designed using a testing and analysis software platform. The dual-linear scan... Figure 3 As shown, the dual-scan pattern... Figure 4 As shown.

[0071] exist Figure 3 and Figure 4 In this process, through modules such as beam deflection control, scanning trajectory setting, and scanning imaging mode in the detection and analysis software platform, the first linear array phased array ultrasonic probe 2-1 and the second linear array phased array ultrasonic probe 2-2 are configured to simultaneously perform linear scanning or sector scanning. The linear scanning area includes a longitudinal linear scanning area 9-1 and a transverse linear scanning area 10-1, and the sector scanning area includes a longitudinal sector scanning area 11-1 and a transverse sector scanning area 12-1. The superimposed area of ​​the four is as follows: Figure 5 The image shows the "dual-line scan + dual-sector scan" region 13 obtained by the dual-linear array phased array ultrasonic probe. It can be seen that, under the combined detection method of the first linear array phased array ultrasonic probe 2-1 and the second linear array phased array ultrasonic probe 2-2, the single-scan range of the focused sound beam (i.e., the "dual-line scan + dual-sector scan" region 13 of the dual-linear array phased array ultrasonic probe) can basically cover the entire apex area of ​​the L-shaped angle steel. It should be noted that, due to the narrow right-angle structure at the top of the L-shaped angle steel, the ultrasonic beam will have a certain detection blind zone when propagating inside the angle steel due to sound wave reflection, refraction, interference, etc. Figure 5 The blind spot 14 is shown in the diagram. Furthermore, research on the production process and quality inspection of L-shaped angle steel in the steel manufacturing industry reveals that internal defects in finished L-shaped angle steel products are mainly distributed in the area near the arc surface, almost entirely ignoring the narrow right-angled area at the top of the angle steel. Therefore, for the L-shaped angle steel samples being inspected, a customized dual-linear phased array ultrasonic probe "dual-line scan + dual-sector scan" combined detection scheme, designed using a detection and analysis software platform, can achieve the goal of essentially covering the entire top corner area of ​​the L-shaped angle steel in a single scan by the focused sound beam.

[0072] To achieve good filtering and noise reduction during the detection process, the acoustic beam signal acquisition gates are configured as follows: First, based on the propagation path and coverage area of ​​the focused acoustic beam, longitudinal linear scan acquisition gates 9-2, transverse linear scan acquisition gates 10-2, longitudinal sector scan acquisition gates 11-2, and transverse sector scan acquisition gates 12-2 are added for the dual-linear array phased array ultrasonic probe in line scan mode. Second, based on the special arc surface shape of the L-shaped angle steel apex area and the boundary of the sector scan area, adaptive acoustic beam signal acquisition gates (arc-shaped) are added for the dual-linear array phased array ultrasonic probe in sector scan mode, including longitudinal linear scan acquisition adaptive gates 9-3, transverse linear scan acquisition adaptive gates 10-3, longitudinal sector scan acquisition adaptive gates 11-3, and transverse sector scan acquisition adaptive gates.

[0073] (2) Preparation of the inspection and scanning device 12-3

[0074] Based on the physical parameters of the L-shaped angle steel sample being tested, such as its geometric dimensions, material density, and internal acoustic wave velocity, and on the basis of selecting the aforementioned linear phased array ultrasonic probe and flat wedge block, corresponding components such as probe moving device, ultrasonic signal excitation and receiving board, and detection data analysis and processing platform are configured.

[0075] Two electromagnetic mobile scanners are selected as the first probe moving unit 3-1 and the second probe moving unit 3-2 to form a dual linear array phased array ultrasonic probe moving device. The electromagnetic mobile scanner has functions such as automatic distance counting by encoder and magnetic adsorption (magnetic adsorption force ≥100N) between the scanner body and the surface of angle steel. It is also equipped with components such as a detachable probe clamping arm and an integrated encoder-type drive wheel.

[0076] A multi-channel phased array excitation receiver board is selected as the ultrasonic signal excitation receiver board. This board has excellent performance characteristics such as 1 to 128 independent transmit / receive channels, a pulse repetition frequency adjustment range of 0 to 20 kHz (1 kHz resolution), a pulse width adjustment range of 20 to 1000 ns (4 ns resolution), a focus delay adjustment range of 0 to 40 µs (1 ns resolution), and a receiving bandwidth adjustment range of 50 kHz to 20 MHz.

[0077] A detection and analysis software platform specifically designed for L-shaped angle steel structures was developed based on Visual Studio. The software platform has a built-in two-dimensional fusion imaging module for ultrasonic echo data and a real-time three-dimensional fusion imaging module for ultrasonic volume data, and can provide two-dimensional and three-dimensional visualization imaging results of internal defects of L-shaped angle steel.

[0078] The ultrasonic signal excitation receiver board and the detection and analysis software platform are integrated into a portable all-in-one machine as the host 8. The host 8 also supports multiple detection modes such as electronic linear scanning, sector scanning, full-matrix data-based and plane wave data-based full-focus scanning.

[0079] (3) Sample testing and data acquisition

[0080] Before testing, an ultrasonic coupling agent is applied to the outer surface of the L-shaped angle steel sample, or water is sprayed in real time. Then, the first linear array phased array ultrasonic probe 2-1 and the second linear array phased array ultrasonic probe 2-2 are placed on the outer back of the apex corner of the L-shaped angle steel (e.g., Figure 1 As shown, the host computer 8 drives the first probe moving unit 3-1 and the second probe moving unit 3-2 to move the first linear array phased array ultrasonic probe 2-1 and the second linear array phased array ultrasonic probe 2-2 synchronously along the length of the angle steel. The moving speed can be selected as 0.1 m / s. The host computer 8 uses real-time acquisition, processing, and storage of the ultrasonic detection signals received by the first linear array phased array ultrasonic probe 2-1 and the second linear array phased array ultrasonic probe 2-2.

[0081] (4) Data analysis and defect identification

[0082] The ultrasonic detection signals received by the first linear phased array ultrasonic probe 2-1 and the second linear phased array ultrasonic probe 2-2 are post-processed using the built-in detection and analysis software platform of the host 8. Based on the two-dimensional fusion imaging module of ultrasonic echo data and the real-time three-dimensional fusion imaging module of ultrasonic volume data built into the angle steel phased array ultrasonic detection and analysis software, a two-dimensional image of the internal defects of the L-shaped angle steel (such as...) is formed on the interactive interface of the host 8. Figure 6 (as shown), 3D imaging results (such as) Figure 7 (As shown). Based on the color differences and known defect characteristics displayed in the imaging images, different types of defects inside the angle steel were identified.

[0083] (5) Defect localization and quantitative characterization

[0084] Figure 6-7 The image shows the two-dimensional and three-dimensional imaging results of internal defects obtained from dual-linear phased array ultrasonic nondestructive testing of the L-shaped angle steel sample in this embodiment. Figure 6-7 It can be seen that in the two-dimensional and three-dimensional imaging results of the L-shaped angle steel sample in this embodiment, no defect feature information was highlighted compared to the background noise, indicating that there were no defects inside the L-shaped angle steel sample after scanning.

[0085] In addition, from Figure 6 The horizontal and vertical coordinates of the scanned area can be extracted from the two-dimensional imaging results shown (with an accuracy of up to 0.1 mm). Figure 7 The spatial location information of the scanned area can be extracted from the three-dimensional imaging results shown (with an accuracy of up to 0.1 mm). That is, if the L-shaped angle steel sample being tested contains defects, the key information such as the size, shape, and orientation of the defects can be directly extracted from the two-dimensional and three-dimensional imaging results of the "dual-line scan + dual-sector scan" area of ​​the dual-linear phased array ultrasonic probe, thereby realizing the quantitative characterization of the defects.

[0086] (6) Defect evaluation and report generation

[0087] Referring to relevant standards in the manufacturing, testing, and use of L-shaped angle steel, and combining the results of joint scanning inspection of internal defects using dual-linear phased array ultrasonic probes, the internal defect status and potential quality risks of the inspected L-shaped angle steel products are assessed. Information on the entire testing process, including testing procedures, equipment parameters, testing environment, and defect detection results, is collected and compiled to create a detailed testing report. The report also provides intuitive two-dimensional and three-dimensional visualization, characterization, and analysis results of internal defects in the L-shaped angle steel.

[0088] Example 2

[0089] Based on the same inventive concept, this invention also provides a phased array ultrasonic nondestructive testing method for angle steel inspection, employing the aforementioned phased array ultrasonic nondestructive testing device for angle steel inspection, the method comprising the following steps:

[0090] The detection and analysis software platform is initialized based on the geometric dimensions and material acoustic parameters of the angle steel to be tested.

[0091] The first probe moving unit and the second probe moving unit are respectively arranged on the back of the two limbs on the outer side of the top corner of the angle steel;

[0092] The first linear phased array ultrasonic probe and the second linear phased array ultrasonic probe are controlled to perform linear scanning and sector scanning while moving along the length of the angle steel.

[0093] The ultrasonic echo signals received by the first linear phased array ultrasonic probe and the second linear phased array ultrasonic probe are collected.

[0094] The ultrasonic echo signal is post-processed using a detection and analysis software platform to generate two-dimensional and three-dimensional internal structure images of the angle steel.

[0095] The detection and analysis software platform identifies different types of defects inside angle steel based on color differences and known defect characteristics displayed in the internal structure images.

[0096] Preferably, when initializing the detection and analysis software platform, the sound beam propagation path is modeled based on the arc structure of the top corner region of the angle steel.

[0097] Preferably, when acquiring ultrasonic echo signals, the acoustic beam signal acquisition gate is adaptively adjusted according to the geometric profile of the angle steel.

[0098] Preferably, the linear scanning and sector scanning specifically include: based on the geometry of the angle steel to be inspected, the detection and analysis software platform controls the first linear array phased array ultrasonic probe and the second linear array phased array ultrasonic probe to form a linear scanning beam propagating along the back of the angle steel in a linear scanning manner, and to form a sector scanning beam covering the top corner area of ​​the angle steel in a sector scanning manner, so that the linear scanning beam and the sector scanning beam are superimposed in space, thereby enabling the single scan range of the focused beam to cover the top corner area of ​​the angle steel.

[0099] Preferably, the acoustic beam signal acquisition gate is distributed in an arc shape in the sector scanning mode.

[0100] Preferably, based on the generated two-dimensional and three-dimensional imaging results, the internal defects of the angle steel are spatially located and the geometric dimension information of the defects is obtained.

[0101] The phased array ultrasonic non-destructive testing method for angle steel includes the following steps: test scheme design, test scanning device preparation, sample testing and data acquisition, data analysis and defect identification, defect location and quantitative characterization, defect evaluation and report generation. This invention addresses the unique arc-shaped surface of the apex region of L-shaped angle steel by employing a customized "dual-line scan + dual-sector scan" joint detection scheme using a dual-line array phased array ultrasonic probe. This allows the phased array ultrasonic focused beam to essentially cover the entire apex region of the L-shaped angle steel in a single scan. Furthermore, it provides an adaptive calculation function for the acoustic beam signal acquisition gate, taking into account the geometry of the L-shaped angle steel and the propagation characteristics of the phased array ultrasonic line and sector scan beams. This is particularly suitable for detecting internal defects in the apex region of L-shaped angle steel with complex structures and irregular boundaries. By combining key components such as a dual-line array phased array ultrasonic probe moving device, an ultrasonic signal excitation and receiving board, and a detection and analysis software platform, synchronous acquisition of signals received by the dual-line array phased array ultrasonic probe can be achieved during the L-shaped angle steel inspection. Based on the built-in ultrasonic echo data two-dimensional fusion imaging module and ultrasonic volume data real-time three-dimensional fusion imaging module in the angle steel phased array ultrasonic detection and analysis software, two-dimensional and three-dimensional visualized imaging results of internal defects in the L-shaped angle steel can be generated.

[0102] Example 3

[0103] A phased array ultrasonic non-destructive testing device for inspecting angle steel, the device comprising:

[0104] The first probe moving unit is attached to the back of one leg of the angle steel to be tested during detection.

[0105] The second probe moving unit is connected to the first probe moving unit through a hinge structure and is attached to the back of the other leg of the angle steel to be tested during detection.

[0106] The first linear phased array ultrasonic probe is fixed to one side of the first probe moving unit;

[0107] The second linear phased array ultrasonic probe is fixed to one side of the second probe moving unit;

[0108] The host is electrically connected to the first linear array phased array ultrasonic probe, the second linear array phased array ultrasonic probe, the first probe moving unit, and the second probe moving unit via cables. The host has a built-in detection and analysis software platform for processing the ultrasonic echo signals received by the first linear array phased array ultrasonic probe and the second linear array phased array ultrasonic probe and generating imaging results of the inside of the angle steel.

[0109] The power supply is electrically connected to the first probe moving unit and the second probe moving unit.

[0110] The detection and analysis software platform is configured to perform combined linear and sector scanning of the sound beam based on the geometry of the angle steel, so that the single scan range of the focused sound beam covers the top corner area of ​​the angle steel.

[0111] Preferably, the first probe moving unit and the second probe moving unit are permanent magnet moving scanners, the adsorption unit is a permanent magnet, and the walking power is provided by a built-in servo motor.

[0112] The other necessary technical contents not mentioned are the same as those in Embodiment 1 or are existing technologies, so they will not be described again.

[0113] Example 4

[0114] A phased array ultrasonic non-destructive testing device for inspecting angle steel, the device comprising:

[0115] The first probe moving unit is attached to the back of one leg of the angle steel to be tested during detection.

[0116] The second probe moving unit is connected to the first probe moving unit through a hinge structure and is attached to the back of the other leg of the angle steel to be tested during detection.

[0117] The first linear phased array ultrasonic probe is fixed to one side of the first probe moving unit;

[0118] The second linear phased array ultrasonic probe is fixed to one side of the second probe moving unit;

[0119] The host is electrically connected to the first linear array phased array ultrasonic probe, the second linear array phased array ultrasonic probe, the first probe moving unit, and the second probe moving unit via cables. The host has a built-in detection and analysis software platform for processing the ultrasonic echo signals received by the first linear array phased array ultrasonic probe and the second linear array phased array ultrasonic probe and generating imaging results of the inside of the angle steel.

[0120] The power supply is electrically connected to the first probe moving unit and the second probe moving unit.

[0121] The detection and analysis software platform is configured to perform combined linear and sector scanning of the sound beam based on the geometry of the angle steel, so that the single scan range of the focused sound beam covers the top corner area of ​​the angle steel.

[0122] Preferably, the first probe moving unit and the second probe moving unit are negative pressure moving scanners. Their built-in adsorption units are connected to an external air pump through an air pipe. The air pump continuously and actively draws air, and the adsorption unit relies on the internal negative pressure to form a stable adsorption with the surface of the angle steel. The walking power of the first probe moving unit and the second probe moving unit is provided by the built-in servo motor.

[0123] The other necessary technical contents not mentioned are the same as those in Embodiment 1 or are existing technologies, so they will not be described again.

[0124] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the present invention.

Claims

1. A phased array ultrasonic non-destructive testing device for inspecting angle steel, characterized in that, include: The first probe moving unit is attached to the back of one leg of the angle steel to be tested during detection. The second probe moving unit is connected to the first probe moving unit through a hinge structure and is attached to the back of the other leg of the angle steel to be tested during detection. The first linear phased array ultrasonic probe is fixed to one side of the first probe moving unit; The second linear phased array ultrasonic probe is fixed to one side of the second probe moving unit; The host is electrically connected to the first linear array phased array ultrasonic probe, the second linear array phased array ultrasonic probe, the first probe moving unit, and the second probe moving unit via cables. The host has a built-in detection and analysis software platform for processing the ultrasonic echo signals received by the first linear array phased array ultrasonic probe and the second linear array phased array ultrasonic probe and generating imaging results of the inside of the angle steel. The power supply is electrically connected to the first probe moving unit and the second probe moving unit. The detection and analysis software platform is configured to perform combined linear and sector scanning of the sound beam based on the geometry of the angle steel, so that the single scan range of the focused sound beam covers the top corner area of ​​the angle steel. The first probe moving unit and the second probe moving unit are electromagnetic moving scanners; Both the first probe moving unit and the second probe moving unit integrate encoders to obtain probe movement displacement information. The linear scanning and sector scanning are specifically performed as follows: based on the geometric shape of the angle steel to be detected, the detection and analysis software platform controls the first linear array phased array ultrasonic probe and the second linear array phased array ultrasonic probe to form a linear scanning beam that propagates along the back of the angle steel in a linear scanning manner, and to form a sector scanning beam that covers the top corner area of ​​the angle steel in a sector scanning manner. When acquiring ultrasonic echo signals, the acoustic beam signal acquisition gate is adaptively adjusted according to the geometric contour of the angle steel. The acoustic beam signal acquisition gate is distributed in an arc shape in the fan-shaped scanning mode.

2. The phased array ultrasonic non-destructive testing device for angle steel inspection according to claim 1, characterized in that, The hinge structure has built-in wires.

3. The phased array ultrasonic non-destructive testing device for angle steel inspection according to claim 1, characterized in that, The host is a portable all-in-one machine.

4. The phased array ultrasonic non-destructive testing device for angle steel inspection according to claim 1, characterized in that, The detection and analysis software platform includes a two-dimensional fusion imaging module for ultrasonic echo data and a real-time three-dimensional fusion imaging module for ultrasonic body data.

5. A phased array ultrasonic non-destructive testing method for inspecting angle steel, characterized in that, The method using a phased array ultrasonic nondestructive testing device for angle steel inspection as described in any one of claims 1-4 includes the following steps: Initialize the detection and analysis software platform based on the geometric dimensions and material acoustic parameters of the angle steel to be tested; The first probe moving unit and the second probe moving unit are respectively arranged on the back of the two limbs on the outer side of the top corner of the angle steel; The first linear phased array ultrasonic probe and the second linear phased array ultrasonic probe are controlled to perform linear scanning and sector scanning while moving along the length of the angle steel. The ultrasonic echo signals received by the first linear phased array ultrasonic probe and the second linear phased array ultrasonic probe are collected. The ultrasonic echo signal is post-processed using a detection and analysis software platform to generate two-dimensional and three-dimensional internal structure images of the angle steel. The detection and analysis software platform identifies different types of defects inside angle steel based on color differences and known defect characteristics displayed in the internal structure images.

6. The phased array ultrasonic non-destructive testing method for angle steel inspection according to claim 5, characterized in that, When initializing the detection and analysis software platform, the sound beam propagation path is modeled based on the arc structure of the top corner area of ​​the angle steel.

7. The phased array ultrasonic non-destructive testing method for angle steel inspection according to claim 5, characterized in that, Based on the generated two-dimensional and three-dimensional imaging results, the internal defects of the angle steel are spatially located and the geometric dimension information of the defects is obtained.

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