CN105044211A - 3D Visual Ultrasonic Inspection Process of Defects Based on TRL Phased Array Probe - Google Patents

Abstract

A defect 3D visualization ultrasonic detection process based on TRL phased array probe belongs to the field of ultrasonic nondestructive testing and evaluation technology. The process adopts a phased array ultrasonic detection system consisting of a Dynaray? Lite ultrasonic phased array detector, a computer with an integrated UltraVision3.2R9 phased array operating system, a TRL array probe, a scanner and a calibration test block. The test block is scanned and data collected in combination with projection focusing, modeling is achieved using CAD software, and angle synthesis is performed through the UltraVision data processing platform to achieve the purpose of 3D visualization. Compared with the 3D visualization method of one-dimensional linear array, this method has higher detection resolution and detection efficiency, and the sound beam is flexible and controllable, which helps to reduce the probability of defect missed detection during the detection process and has good engineering application value.

Description

3D Visual Ultrasonic Inspection Process of Defects Based on TRL Phased Array Probe

technical field

The invention relates to a defect 3D visualized ultrasonic detection process based on a TRL phased array probe, which belongs to the technical field of ultrasonic nondestructive detection and evaluation.

Background technique

Phased Array Ultrasonic Testing (PAUT) technology has become one of the hot research technologies in recent years because of its advantages of good acoustic beam accessibility, high detection resolution and high sensitivity. Since conventional ultrasonic phased array probes are mostly one-dimensional linear arrays, they only have the ability to focus the acoustic beam in the distribution direction of the array elements, and the defect imaging results belong to two-dimensional imaging. However, most of the defects to be inspected in actual engineering are three-dimensional defects, and two-dimensional imaging obviously cannot fully, intuitively, and accurately reflect the shape characteristics of defects, and there are problems such as limited sound beam coverage, difficult defect qualitative, and low positioning and quantitative accuracy. . With the development of computer software technology and computer graphics and other disciplines, three-dimensional imaging of defects has become possible, so the development of phased array ultrasonic 3D visual inspection technology is imperative.

Using conventional one-dimensional ultrasonic phased array probes for data acquisition and processing can realize three-dimensional imaging of structural defects, but the disadvantages are that the data acquisition speed is slow, the amount of data to be synthesized is large, and the effect is not ideal. In contrast, the Transmitter/Receiver Longitudinal wave (TRL) probe is a two-dimensional area array, which has the characteristics of high detection sensitivity and resolution, good accessibility and controllability of the acoustic beam, and can Flexible realization of 3D data acquisition, and clearer 3D defect imaging results.

Contents of the invention

The purpose of the present invention is to provide a defect 3D visual ultrasonic detection process based on a TRL phased array probe. The process is to use TRL probes for 3D data acquisition, and realize phased array 3D visualization process through CAD solid modeling. This process can reflect the three-dimensional characteristics of defects stereoscopically and intuitively, and solve the problems of limited acoustic beam coverage and low detection efficiency in two-dimensional imaging detection; compared with the 3D visualization method of one-dimensional line array, the TRL probe has better sensitivity and higher resolution. High, and has good beam accessibility and controllability.

The technical scheme adopted in the present invention is: a defect 3D visual ultrasonic detection process based on TRL phased array probe, which adopts DynarayLite ultrasonic phased array detector, UltraVision3.2R9 phased array operating system, TRL area array probe, scanning A detection system composed of a detector and a calibration test block realizes 3D visualization of structural defects through data acquisition, volume modeling, and 3D visualization post-processing. The measurement steps of the method are as follows:

(1) Understand the material grade, weld type, welding process, size and scope of the tested part, make a clear weld mark, welding position marking line and weld position reference point on the surface of the tested part, and Carry out surface treatment to make the probe move freely on the fully contacted surface, and select a suitable coupling agent according to the material to be tested;

(2) Establish a sample size model in the UltraVision3.2R9 phased array operating system, or establish a sample size model based on CAD and import it into the UltraVision3.2R9 phased array operating system;

(3) According to the test results of longitudinal wave sound velocity and attenuation coefficient in the inspected area, edit the material properties in the model, select the projection focusing method and the appropriate inspection angle;

(4) Connect the TRL probe with the DynarayLite ultrasonic phased array detector, build a phased array detection system, determine the focal law, ultrasonic settings and mechanical settings of the ultrasonic phased array system according to the defect characteristics, and use the UltraVision3.2R9 phased array operating system Add dynamic volume corrected sector scan, B scan, C scan and D scan to the detection interface, and add static volume corrected sector scan, B scan, C scan and D scan to the analysis interface Figure, and finally the wedge delay and longitudinal wave sound velocity calibration for the phased array detection system;

(5) Calibrate the stepping speed of the scanner, assemble the TRL probe and the scanner, and set the scanning trajectory, resolution and scanning stepping speed, start the scanner to scan, and use the projection focus mode for focusing, record the scan results;

(6) Process the scan data and perform post-processing of 3D visualization. First, use CAD software for solid modeling, then import the model into UltraVision3.2R9 software, and adjust the relative position of the probe and the model in the software platform to find a reasonable probe scan. Finally, angle synthesis is performed on the UltraVision3.2R9 software platform to obtain a preliminary 3D visualization view and quantitative analysis of the defect depth.

The beneficial effects of the present invention are: the defect 3D visual ultrasonic detection process based on the TRL phased array probe can reflect the three-dimensional characteristics of the defect three-dimensionally and intuitively, and solve the problems of limited sound beam coverage and low detection efficiency in two-dimensional imaging detection; The 3D visualization method of the three-dimensional line array has faster data acquisition speed, higher detection resolution, and more flexible controllability of the detection sound beam. The invention can carry out three-dimensional imaging on structural defects, thereby providing strong evidence for the hazard evaluation of defects, and helping to reduce the probability of missing detection of defects in the detection process, and has good engineering application value.

Description of drawings

The present invention will be further described below in conjunction with drawings and embodiments.

Figure 1 is a schematic diagram of the ultrasound imaging system used.

Figure 2 is a flowchart of 3D visual ultrasonic detection of defects based on TRL phased array probe.

Figure 3 is the experimental B-scan data collected by the TRL ultrasonic phased array probe.

Figure 4 is the solid model of the circumferential test block established in the CAD software system.

Fig. 5 is a 3D visualization view of a single hole defect processed by using the UltraVision3.2R9 software processing platform.

Figure 6 is a 3D visualization of the entire B-scan.

Detailed ways

The schematic diagram of the ultrasonic imaging system used in the defect 3D visual ultrasonic detection process based on TRL phased array probe is shown in Figure 1, which includes DynarayLite ultrasonic phased array detector, UltraVision3.2R9 phased array operating system, 1.5MHz TRL probe, scanning Checker and Calibration Block. The defect 3D visual ultrasonic detection process is shown in Figure 2. The specific measurement and processing steps are as follows:

(1) The test block to be inspected is a circumferential test block with a stainless steel surfacing layer structure with a wall thickness of 70mm. The total length of the test block is 230mm and the outer diameter is 495mm. There are 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 65mm deep artificial defect holes on the side of the test block, the hole diameter is 2mm, and the hole length is 80mm. Select a water-based ultrasonic coupling agent according to the test block to be tested.

(2) Connect the 1.5MHz TRL probe to the DynarayLite ultrasonic phased array detector to assemble the phased array detection system; determine the ultrasonic settings and mechanical settings of the phased array system according to the characteristics of the defect, and select the projection focusing method. In the UltraVision3.2R9 phase Add dynamic volume corrected sector scan, B scan, C scan and D scan to the detection interface of the phased array operating system; add static volume corrected sector scan to the analysis interface of UltraVision3.2R9 phased array operating system , B-scan, C-scan and D-scan; wedge delay and longitudinal wave sound velocity calibration for the phased array detection system.

(3) According to the test results of longitudinal wave sound velocity and attenuation in the inspected area, edit the material properties in the model. Select the angle range from 11° to 70°, the angle resolution to 1°, set the focus mode to projection focus, and calibrate the stepping speed of the scanner. Assemble the 1.5MHz TRL probe and scanner, start the scanner to scan, and get the B-scan result data (as shown in Figure 3), where Figure 3(a) is the 11° scan result, and Figure 3(b) is the 26° scan result Check the results.

(4) set up the test block model in the CAD software system and carry out parameter assignment (as shown in Figure 4), each parameter is the same as step (1);

(5) Process the scan data and perform 3D visualization post-processing. Import the solid modeling established by CAD software into UltraVision3.2R9 software, adjust the relative position of the probe and the model on the software platform to find a reasonable probe scanning position, and finally perform angle synthesis on the UltraVision3.2R9 software platform to obtain a preliminary 3D visualization view. Figure 5(a) and Figure 5(b) respectively show the 3D visible side view and top view of the horizontal hole with a depth of 40mm, and Figure 6 is the 3D visualization effect diagram of all hole B scans. According to the 3D visualization results, the depth quantification of horizontal holes with different depths can be carried out, and the quantitative results are shown in Table 1.

Table 1 Experimental detection results and relative errors of horizontal holes with different depths

Claims (1)

1. the visual Ultrasonic Detection of the defect 3D based on a TRL phased array probe flow process, it is characterized in that: adopt the detection system be made up of DynarayLite ultrasonic phase array detector, UltraVision3.2R9 phased array operation system, TRL face battle array probe, scanner and calibration block, the 3D being realized fault of construction by data acquisition, modeling volume, three-dimensional visible aftertreatment is visual, and the measuring process of described method is as follows:

(1) material trademark of detected member, weld seam pattern, welding technology, size and scope is understood, weld seam mark, welding position tag line and position while welding reference point are clearly made to detected member surface, surface treatment is carried out to detected member, probe is moved freely on complete surface in contact, and according to the suitable couplant of detected material selection;

(2) in UltraVision3.2R9 phased array operation system, set up specimen size model, or set up specimen size model importing UltraVision3.2R9 phased array operation system according to CAD;

(3) according to the longitudinal wave velocity in tested region, the test result of attenuation coefficient, the material properties in edit model, selects the projection type of focusing and suitable detection angles;

(4) TRL probe and DynarayLite ultrasonic phase array detector is connected, build phased array detection system, arrange according to the focusing rule of defect characteristic determination ultrasound phase-control array 1 system, ultrasonic setting and machinery, be added to fan sweeping figure, B that Mobile state volume correction crosses to sweep figure, C and sweep figure and D at the detection interface of UltraVision3.2R9 phased array operation system and sweep figure, and add static volume corrected fan sweeping figure, B at assay surface and sweep figure, C and sweep figure and D and sweep figure, finally voussoir delay and longitudinal wave velocity calibration are carried out to phased array detection system;

(5) calibrate the stepping rate of scanner, assembling TRL probe and scanner, and set scanning path, resolution and scanning stepping rate, start scanner and carry out scanning, focus on and adopt projection focusing mode, record scanning result;

(6) scanning data are processed, carry out 3D Visualized Post Processing, first CAD software is utilized to carry out solid modelling, subsequently model is imported UltraVision3.2R9 software, in software platform, adjustment probe and the relative position of model are to find rational probe scanning position, finally on UltraVision3.2R9 software platform, carry out angle synthesis, obtain preliminary 3D visualization view, and quantitative test is carried out to depth of defect.