Large-volume steel seamless gas cylinder inner wall eddy current video detection system

Abstract

The invention discloses an eddy current video detection system for the inner wall of a large-volume steel seamless gas cylinder, which relates to the technical field of nondestructive testing, and has the technical key points that the system constructs a space coordinate mapping algorithm through eddy current and video bimodal data fusion to realize the unification of quantitative detection and qualitative analysis of defects; the system not only improves the detection accuracy, but also reduces the false alarm rate.

Description

Technical Field

[0001] The present invention relates to the technical field of non-destructive testing, and particularly to an eddy current video detection system for the inner wall of a large-volume seamless steel gas cylinder. Background Art

[0002] The eddy current principle is a non-destructive testing technology that works based on the principle of electromagnetic induction. The probe generates an alternating magnetic field. When it comes into contact with a conductive material, the magnetic field induces eddy currents. The intensity and distribution of the eddy currents are affected by the material properties, thickness, and defects. The signal changes are captured and analyzed by the probe to determine whether there are defects such as cracks and corrosion in the material. Eddy current testing is applicable to metal materials and has the advantages of high sensitivity, rapid detection, and non-destructive testing. It is widely used in industries such as aerospace, automotive, pipelines, and electricity.

[0003] Existing conventional eddy current flaw detection systems have low flexibility and cannot detect specimens with complex shapes; they cannot display defect patterns, so it is impossible to judge the nature of the defects from the displayed signals.

[0004] Therefore, the present invention aims to provide an eddy current video detection system for the inner wall of a large-volume seamless steel gas cylinder to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems by providing an eddy current video detection system for the inner wall of a large-volume seamless steel gas cylinder. This system realizes the unification of quantitative defect detection and qualitative analysis by constructing a spatial coordinate mapping algorithm through the fusion of eddy current + video dual-modal data, which can improve the defect detection rate and reduce the false alarm rate.

[0006] To achieve the above purpose, the technical solution of the present invention is as follows:

[0007] The present invention provides an eddy current video detection system for the inner wall of a large-volume seamless steel gas cylinder, which includes a data acquisition module, a data transmission module, a data processing module, and a human-computer interaction module;

[0008] The data acquisition module uses a multi-probe array probe to perform multi-frequency eddy current detection on the item to be detected, and uses electric rotation scanning to collect the temperature, meter counting, inclination angle, and rotational eddy current of the item to be detected; uses a camera to perform video image detection on the object to be detected, records the surface state of the item to be detected and the working condition of the eddy current probe, and simultaneously displays the impedance plane diagram and time-base scan line of each channel;

[0009] The data transmission module transmits the data collected by the data acquisition module to the data processing module;

[0010] The data processing module includes an input end and an output end;

[0011] The data processing module processes and saves the data transmitted by the data transmission module to obtain image data, axial travel distance data, and circumferential inclination attitude data, and correlates the data collected by the multi-probe array probe with the camera monitoring data to form a spatial coordinate mapping, and displays the image data, axial travel distance data, circumferential inclination attitude data, and spatial coordinate mapping through the output end;

[0012] The human-computer interaction module inputs parameters through the input end, manages the data saved by the data processing module, and can also generate a data report and output the report / print through the output end for data maintenance backup, operation log, and online help.

[0013] The camera has 12 million pixels, a circumferential inclination accuracy of ±1°, a distance positioning accuracy of ±3%, and a (defect) size measurement accuracy of ±5%. The data processing module can simultaneously perform functions such as high-definition video imaging, video recording, unfolding, and remote data transmission (image transmission) during the travel at 3 m / min, and can be unfolded and post-stitched into a 2D sectional view in real time, with a length scale and a circumferential angle scale superimposed.

[0014] The image data includes the length, width, and area of the circled area of the item to be detected; the output end can be locally magnified, reduced, marked, and have remarks; the output end has viewing enhancement functions such as grayscale negative, contrast adjustment, brightness adjustment, tone curve adjustment, single-channel separation, and angle rotation.

[0015] A device for implementing an eddy current video detection system for the inner wall of a large-volume steel seamless gas cylinder includes a probe mechanism, a data adapter box, a data transmission line, and a detection host.

[0016] One end of the probe mechanism is connected to one end of the data transmission line, the end of the data transmission line not connected to the probe mechanism is connected to the data adapter box, and the data adapter box is connected to the detection host.

[0017] The probe mechanism internally contains the data acquisition module chip;

[0018] The data adapter box is used to receive the data of the item to be detected detected by the probe mechanism, and the data transmission line is used to transmit the data to the detection host;

[0019] The detection host internally contains the data processing module chip and the human-computer interaction module chip, processes and saves the data of the item to be detected collected by the probe mechanism through the detection host, and outputs through the display on the detection host. The user inputs parameters through the human-computer interaction module, manages the data saved by the data processing module, and can also generate a data report and output / print it for data maintenance backup, operation log, and online help.

[0020] Compared with the prior art, the beneficial effects of this solution:

[0021] The present invention utilizes advanced signal processing algorithms to more effectively identify and distinguish defect signals from noise, thereby improving the reliability of detection. Through the dual-modal data fusion of eddy current + video, a spatial coordinate mapping algorithm is constructed to achieve the unification of quantitative defect detection and qualitative analysis, improving the accuracy of detection and reducing the false alarm rate. It not only solves the limitations of traditional eddy current flaw detectors but also opens up a new path for the development of future detection technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a flowchart of the detection system in an embodiment of the present invention;

[0023] Figure 2 is a working flowchart of the detection device of the detection system in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution of the present invention will be further described in detail below in conjunction with the embodiments and drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below in conjunction with the embodiments.

[0026] Embodiment:

[0027] The present invention provides an eddy current video detection system for the inner wall of a large-volume seamless steel gas cylinder, which includes a data acquisition module, a data transmission module, a data processing module, and a human-computer interaction module;

[0028] The data acquisition module uses a multi-probe array probe to perform multi-frequency eddy current detection on the item to be detected, and electrically rotates and scans to collect the temperature, meter count, inclination, and rotational eddy current of the item to be detected; uses a camera to perform video image detection on the object to be detected, records the surface state of the item to be detected and the working condition of the eddy current probe, and simultaneously displays the impedance plane diagram and time-base scan line of each channel;

[0029] The data transmission module transmits the data collected by the data acquisition module to the data processing module;

[0030] The data processing module includes an input end and an output end;

[0031] The data processing module processes and saves the data transmitted by the data transmission module to obtain image data, axial travel distance data, and circumferential inclination attitude data, and correlates the data collected by the multi-probe array probe with the camera monitoring data to form a spatial coordinate mapping, and displays the image data, axial travel distance data, circumferential inclination attitude data, and spatial coordinate mapping through the output end;

[0032] The human-computer interaction module inputs parameters through the input end, manages the data saved by the data processing module, can also generate a data report and output the report / print through the output end, and performs data maintenance backup, operation log recording, and online help.

[0033] The data acquisition module can collect images of the item to be detected in real time through the camera, and the images are transmitted to the data processing module through the data acquisition module for processing to obtain real-time video, and the real-time video is output through the output end.

[0034] The eddy current detection parameters are: minimum crack resolution: width 0.1×depth 0.2×length 5mm; detection channels: 4; probe type: point type / placing type (differential type); frequency range: 100Hz to 3MHz; gain range: 0 to 99.0dB continuously adjustable, step 0.5dB; phase rotation: 0 to 359° continuously adjustable, step 0.5°; gain ratio: (X / Y) 0.1 to 10.0, step 0.1; adjustable probe drive (excitation) level: 1 to 8; display mode: impedance, time base; filter coefficient: 0 - 1000; digital filtering: low pass 0 to 2000Hz, high pass 0 to 2000Hz, combined band pass.

[0035] A device for implementing an eddy current video detection system for the inner wall of a large-volume seamless steel gas cylinder includes a probe mechanism, a data adapter box, a data transmission line, and a detection host.

[0036] One end of the probe mechanism is connected to one end of the data transmission line, the end of the data transmission line not connected to the probe mechanism is connected to the data adapter box, and the data adapter box is connected to the detection host.

[0037] The probe mechanism is internally provided with a data acquisition module chip;

[0038] The data adapter box is used to receive the data of the item to be detected detected by the probe mechanism, and the data transmission line is used to transmit the data to the detection host;

[0039] The detection host is internally provided with the data processing module chip and the human-computer interaction module chip, processes and saves the data of the item to be detected collected by the probe mechanism through the detection host, and outputs through the display on the detection host. The user inputs parameters through the human-computer interaction module, manages the data saved by the data processing module, can also generate a data report and output / print it, and performs data maintenance backup, operation log, and online help.

[0040] The detection host (upper computer) adopts an industrial control all-in-one machine with a high protection level, is built-in with a large-capacity rechargeable lithium battery, integrates a charging management function, has a power-off protection function, and can prevent the loss of corresponding detection data caused by accidental power-off. The multi-core high-speed processor can simultaneously obtain image data, axial travel distance, and circumferential inclination attitude data, and can ensure real-time acquisition of eddy current detection and high-definition images. The related functions of the detection host are as follows:

[0041] 1) Switch: Press and then release, the host starts and the blue indicator light turns on. Long press (≥3 seconds) to force power off and shut down (but try to avoid such forced shutdown), and the 'soft shutdown' function in the WINDOWS operating system should be used to shut down the host.

[0042] 2) USB3.0: Two USB3.0 are compatible with USB2.0 and can be used to plug in USB flash drives, mice, wireless mouse receivers, etc.

[0043] 3) Cable socket: Used to connect to the power supply box, with a red alignment mark.

[0044] 4) Connect to external AC100~240V, and it can work while charging. The internal battery can work for about 1h and the charging time is about 3h.

[0045] The probe mechanism: It can be quickly disassembled and replaced, with aluminum alloy anti-corrosion process and IP54 protection.

[0046] The camera is an all-angle camera, and the image parameters are: lighting source: high-brightness LED, stepless continuous adjustment; image sensor: color CMOS; imaging angle of view: 90° wide angle + 360° circumference, camera pixels / imaging resolution: both dynamic and static pixels are 5 million / 2592×1944. Through the high-definition camera at the end of the eddy current probe device 5, the details inside the item to be detected can be recorded.

[0047] The above specific embodiments are only explanations of the present invention, and they are not limitations of the present invention. Those skilled in the art can make modifications to this embodiment without creative contributions according to needs after reading this specification, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A large-volume steel seamless gas cylinder inner wall eddy current video detection system, characterized by: The system includes a data acquisition module, a data transmission module, a data processing module and a human-computer interaction module; The data acquisition module uses a multi-probe array probe to perform multi-frequency eddy current detection on the object to be detected, and electrically rotates to scan and collect the temperature, meter, inclination and rotating eddy current of the object to be detected; uses a camera to perform video image detection on the object to be detected, records the surface state of the object to be detected and the working condition of the eddy current probe, and displays the impedance plane diagram and time base scan line of each channel at the same time; The data transmission module transmits the data collected by the data collection module to the data processing module; The data processing module comprises an input end and an output end; The data processing module processes and saves the data transmitted by the data transmission module to obtain image data, axial travel distance data and circumferential inclination attitude data, and associates the data collected by the multi-probe array probe with the camera monitoring data to form a spatial coordinate mapping, and displays the image data, axial travel distance data, circumferential inclination attitude data and spatial coordinate mapping through the output end; The human-computer interaction module inputs parameters through the input end, manages the data saved by the data processing module, and can also generate data reports and output reports / print through the output end to perform data maintenance and backup, operation logs, and online help.

2. A large-volume steel seamless gas cylinder inner wall eddy current video detection system as claimed in claim 1, characterized in that: The data acquisition module can acquire images of the object to be detected in real time through a camera, and the images are transmitted to the data processing module through the data acquisition module for processing to obtain real-time video, which is output through the output end.

3. The eddy current video detection system for the inner wall of a large-volume seamless steel gas cylinder as claimed in claim 1 is characterized by: The image data includes the length, width and area of ​​the circled area of ​​the object to be detected; the output end can partially zoom in, zoom out, mark and annotate text; the output end has grayscale negative, contrast adjustment, brightness adjustment, tone curve adjustment, monochrome channel separation, angle rotation and other image enhancement functions.

4. A device for implementing the above-mentioned large-volume steel seamless gas cylinder inner wall eddy current video detection system, characterized in that: The device comprises a probe mechanism, a data transfer box, a data transmission line and a detection host.

5. The eddy current video detection device for the inner wall of a large-volume seamless steel gas cylinder as claimed in claim 4 is characterized by: The probe mechanism is connected to one end of the data transmission line, the end of the data transmission line not connected to the probe mechanism is connected to a data transfer box, and the data transfer box is connected to a detection host.

6. The eddy current video detection device for the inner wall of a large-volume seamless steel gas cylinder as claimed in claim 4, characterized in that: The data acquisition module chip is built into the probe mechanism; The data transfer box is used to receive the data of the object to be detected detected by the probe mechanism, and the data transmission line is used to transmit the data to the detection host; The detection host has built-in data processing module chip and human-computer interaction module chip. The detection host processes and saves the data of the object to be detected collected by the probe mechanism and outputs it through the display on the detection host. The user inputs parameters through the human-computer interaction module, manages the data saved by the data processing module, and can also generate data reports and output / print them, perform data maintenance and backup, run logs, and online help.

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