WO2016155403A1 - Ultrasonic detection and locating method and device based on tofd and phased array - Google Patents

Ultrasonic detection and locating method and device based on tofd and phased array Download PDF

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WO2016155403A1
WO2016155403A1 PCT/CN2016/070606 CN2016070606W WO2016155403A1 WO 2016155403 A1 WO2016155403 A1 WO 2016155403A1 CN 2016070606 W CN2016070606 W CN 2016070606W WO 2016155403 A1 WO2016155403 A1 WO 2016155403A1
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ultrasonic
phased array
tofd
defect
probe
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PCT/CN2016/070606
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French (fr)
Chinese (zh)
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汪月银
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深圳市神视检验有限公司
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Priority to CN201510154222.3A priority patent/CN104792866A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04Analysing solids

Abstract

An ultrasonic detection and locating method and device based on TOFD and a phased array. The device comprises a TOFD detection unit (10) and a phased array detection unit (20). The TOFD detection unit (10) is used for scanning welded seams by using a TOFD ultrasonic detection method, so as to determine the position of a defect. The phased array detection unit (20) is used for scanning welded seams near the determined defect position by using a phased array ultrasonic detection method, identifying a defect of a size exceeding a preset size threshold, and locating the identified defect. Position information of a defect in a horizontal direction and a depth direction can be accurately determined by means of phased array ultrasonic detection; during location in cooperation with TOFD detection, a defect of a welded seam is accurately located by using TOFD scanning serving as a main method and phased array scanning serving as an auxiliary method, thereby overcoming the problems of poor locating precision of TOFD scanning and failure to detect a transverse defect during non-parallel scanning.

Description

一种基于TOFD和相控阵的超声波检测定位方法、装置Ultrasonic detection and positioning method and device based on TOFD and phased array 技术领域Technical field
本发明涉及超声波探伤技术领域,尤其涉及一种基于TOFD和相控阵的超声波检测定位方法及装置。The invention relates to the technical field of ultrasonic flaw detection, in particular to an ultrasonic detecting and positioning method and device based on TOFD and phased array.
背景技术Background technique
TOFD(Time Of Flight Diffraction、超声波衍射时差法)是一种依靠从待检试件内部结构(主要是指缺陷)的“端角”和“端点”处得到的衍射能量来检测缺陷的方法,主要应用于缺陷的检测、定量和定位。TOFD技术作为近几年来新发展应用起来的检测技术,对于一些危害性的缺陷(如裂纹)有很好的检出效果,对提高产品质量有积极的意义。但是另一方面,它还存在定位精确度不足(横向位置及纵向深度)和非平行扫查时难以检出横向缺陷的问题。TOFD (Time Of Flight Diffraction) is a method of detecting defects by relying on the diffraction energy obtained from the "end angle" and "end point" of the internal structure of the test piece (mainly referred to as a defect). Used for the detection, quantification and positioning of defects. As a new detection and application technology in recent years, TOFD technology has a good detection effect for some harmful defects (such as cracks) and has positive significance for improving product quality. On the other hand, however, it has problems of insufficient positioning accuracy (lateral position and longitudinal depth) and difficulty in detecting lateral defects during non-parallel scanning.
传统的超声波检测对缺陷的水平位置以及深度测量有较高的精度,但它存在声束扩散角过窄,无法在定距离(探头前端距焊缝边缘距离保持不变)扫查的情况下将焊缝区域全覆盖扫查进行定位,只能作为TOFD检测过程中表面和底面盲区的检测的补充。The traditional ultrasonic detection has higher accuracy for the horizontal position and depth measurement of the defect, but it has a narrow diffusion angle of the sound beam, and it cannot be scanned at a fixed distance (the distance between the front end of the probe and the edge of the weld remains unchanged). The full coverage of the weld zone is located for scanning and can only be used as a supplement to the detection of the surface and bottom dead zones during the TOFD test.
所以,如何克服上述两种超声波检测方法的缺陷,解决上述两个问题对提高超声波检测质量、保证产品寿命、减少工程事故发生和减少人民生命财产损失有着重大意义。Therefore, how to overcome the shortcomings of the above two ultrasonic testing methods, solving the above two problems is of great significance for improving the quality of ultrasonic testing, ensuring product life, reducing engineering accidents and reducing people's lives and property losses.
发明内容Summary of the invention
本发明的目的在于提出一种基于TOFD和相控阵的超声波检测定位方法及装置,以TOFD扫查为主、相控阵扫查为辅对焊缝缺陷进行精确定位,克服了TOFD扫查定位精度差、非平行扫查时横向缺陷难以检出的问题。The object of the present invention is to provide an ultrasonic detecting and positioning method and device based on TOFD and phased array. The TOFD scanning is mainly used, and the phased array scanning is used as an auxiliary to accurately locate the weld defects, thereby overcoming the TOFD scanning and positioning. The problem of poor accuracy and non-parallel scanning is difficult to detect lateral defects.
为达此目的,本发明采用以下技术方案: To this end, the present invention employs the following technical solutions:
第一方面,提供一种基于TOFD和相控阵的超声波检测定位方法,包括:In a first aspect, an ultrasonic detection and positioning method based on TOFD and phased array is provided, including:
使用TOFD超声波检测方法对焊缝进行扫查,确定出缺陷位置;The weld seam is scanned using the TOFD ultrasonic inspection method to determine the defect position;
使用相控阵超声波检测方法对确定出的缺陷位置附近的焊缝进行扫查,标识出尺寸超过预设尺寸阈值的缺陷,并对标识出的缺陷进行定位。The phased array ultrasonic inspection method is used to scan the welds near the determined defect position, identify the defects whose size exceeds the preset size threshold, and locate the identified defects.
其中,所述使用TOFD超声波检测方法对焊缝进行扫查,确定出缺陷位置,包括:Wherein, the TOFD ultrasonic inspection method is used to scan the weld seam to determine the defect position, including:
在焊缝的一侧放置发射探头,焊缝的另一侧放置接收探头;Place a launch probe on one side of the weld and a receiving probe on the other side of the weld;
将所述接收探头接收到的从所述发射探头发出、经过缺陷的超声波衍射信号,代入预设的椭圆数学模型,计算求出缺陷位置;Substituting the ultrasonic diffraction signal received from the transmitting probe and passing through the defect by the receiving probe into a preset elliptical mathematical model to calculate a defect position;
其中,所述椭圆数学模型的椭圆焦点分别为发射探头位置和接收探头位置。The elliptical focus of the elliptical mathematical model is a transmitting probe position and a receiving probe position, respectively.
其中,所述发射探头发射的超声波束和接收探头接收的超声波束位于同一条直线上、且该直线与所述焊缝成30-75°夹角,或所述发射探头发射的超声波束和接收探头接收的超声波束成90°夹角。Wherein the ultrasonic beam emitted by the transmitting probe and the ultrasonic beam received by the receiving probe are on the same straight line, and the straight line is at an angle of 30-75° with the welding seam, or the ultrasonic beam and the transmitting beam emitted by the transmitting probe The ultrasonic beam received by the probe is at an angle of 90°.
其中,所述标识出尺寸超过预设尺寸阈值的缺陷,并对标识出的缺陷进行定位之后,还包括:在相控阵扇扫图或相控阵线扫图中显示标识出的缺陷。Wherein, the identifying a defect whose size exceeds a preset size threshold, and after identifying the identified defect, further comprising: displaying the identified defect in the phased array fan scan or the phased array scan.
其中,所述使用相控阵超声波检测方法对确定出的缺陷位置附近的焊缝进行扫查,包括:Wherein, the phased array ultrasonic detecting method is used to scan the weld seam near the determined defect position, including:
将相控阵超声波探头设置于确定出的缺陷位置对应的发射探头的位置,使用相控阵超声波检测方法对焊缝进行扫查。The phased array ultrasonic probe is placed at the position of the transmitting probe corresponding to the determined defect position, and the weld is scanned using the phased array ultrasonic detecting method.
第二方面,提供一种基于TOFD和相控阵的超声波检测定位装置,包括:In a second aspect, an ultrasonic detecting and positioning device based on TOFD and a phased array is provided, including:
TOFD检测单元,用于使用TOFD超声波检测方法对焊缝进行扫查,确定出缺陷位置; The TOFD detecting unit is configured to scan the weld seam by using the TOFD ultrasonic detecting method to determine the defect position;
相控阵检测单元,用于使用相控阵超声波检测方法对确定出的缺陷位置附近的焊缝进行扫查,标识出尺寸超过预设尺寸阈值的缺陷,并对标识出的缺陷进行定位。The phased array detecting unit is configured to scan the weld bead near the determined defect position by using the phased array ultrasonic detecting method, identify the defect whose size exceeds the preset size threshold, and locate the identified defect.
其中,所述TOFD检测单元,具体用于:The TOFD detection unit is specifically configured to:
在焊缝的一侧放置发射探头,焊缝的另一侧放置接收探头;Place a launch probe on one side of the weld and a receiving probe on the other side of the weld;
将所述接收探头接收到的从所述发射探头发出、经过缺陷的超声波衍射信号,代入预设的椭圆数学模型,计算求出缺陷位置;Substituting the ultrasonic diffraction signal received from the transmitting probe and passing through the defect by the receiving probe into a preset elliptical mathematical model to calculate a defect position;
其中,所述椭圆数学模型的椭圆焦点分别为发射探头位置和接收探头位置。The elliptical focus of the elliptical mathematical model is a transmitting probe position and a receiving probe position, respectively.
其中,所述发射探头发射的超声波束和接收探头接收的超声波束位于同一条直线上、且该直线与所述焊缝成30-75°夹角,或所述发射探头发射的超声波束和接收探头接收的超声波束成90°夹角。Wherein the ultrasonic beam emitted by the transmitting probe and the ultrasonic beam received by the receiving probe are on the same straight line, and the straight line is at an angle of 30-75° with the welding seam, or the ultrasonic beam and the transmitting beam emitted by the transmitting probe The ultrasonic beam received by the probe is at an angle of 90°.
其中,所述基于TOFD和相控阵的超声波检测定位装置,还包括显示单元,所述显示单元,用于在相控阵扇扫图或相控阵线扫图中显示标识出的缺陷。The ultrasonic detection and positioning device based on the TOFD and the phased array further includes a display unit, and the display unit is configured to display the identified defects in the phased array fan scan or the phased array scan.
其中,所述使用相控阵超声波检测方法对确定出的缺陷位置附近的焊缝进行扫查,包括:Wherein, the phased array ultrasonic detecting method is used to scan the weld seam near the determined defect position, including:
将相控阵超声波探头设置于确定出的缺陷位置对应的发射探头的位置,使用相控阵超声波检测方法对焊缝进行扫查。The phased array ultrasonic probe is placed at the position of the transmitting probe corresponding to the determined defect position, and the weld is scanned using the phased array ultrasonic detecting method.
本发明的有益效果在于:一种基于TOFD和相控阵的超声波检测定位方法、装置包括TOFD检测单元和相控阵检测单元,所述TOFD检测单元,用于使用TOFD超声波检测方法对焊缝进行扫查,确定出缺陷位置;所述相控阵检测单元,用于使用相控阵超声波检测方法对确定出的缺陷位置附近的焊缝进行扫查,标识出尺寸超过预设尺寸阈值的缺陷,并对标识出的缺陷进行定位。超声 波相控阵检测可以精确确定缺陷的水平方向和深度方向的位置信息,在与TOFD检测配合定位的过程中,以TOFD扫查为主、相控阵扫查为辅对焊缝缺陷进行精确定位,克服了TOFD扫查定位精度差、非平行扫查时横向缺陷难以检出的问题。An advantageous effect of the present invention is that a method and apparatus for ultrasonic detection and positioning based on TOFD and phased array includes a TOFD detecting unit and a phased array detecting unit for performing a weld on a weld using a TOFD ultrasonic detecting method Scanning to determine the position of the defect; the phased array detecting unit is configured to scan the weld near the determined defect position by using the phased array ultrasonic detecting method, and identify the defect whose size exceeds the preset size threshold. And locate the identified defects. Ultrasound The wave phased array detection can accurately determine the position information of the horizontal direction and the depth direction of the defect. In the process of coordinating with the TOFD detection, the TOFD scanning is mainly used, and the phased array scanning is used to accurately locate the weld defects. It overcomes the problem that the TOFD scanning positioning accuracy is poor and the lateral defects are difficult to detect when the non-parallel scanning is performed.
附图说明DRAWINGS
为了更清楚地说明本发明实施例中的技术方案,下面将对本发明实施例描述中所需要使用的附图作简单的介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据本发明实施例的内容和这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings may be obtained according to the contents of the embodiments of the present invention and the drawings without any creative work.
图1是本发明提供的基于TOFD和相控阵的超声波检测定位方法第一个实施例的方法流程图。1 is a flow chart of a method for a first embodiment of an ultrasonic detection and positioning method based on TOFD and phased array provided by the present invention.
图2是本发明提供的基于TOFD和相控阵的超声波检测定位方法进行检测的结构示意图。2 is a schematic structural view of the method for detecting ultrasonic positioning based on TOFD and phased array provided by the present invention.
图3是本发明提供的基于TOFD和相控阵的超声波检测定位方法第二个实施例的方法流程图。3 is a flow chart of a method for the second embodiment of the ultrasonic detecting and positioning method based on TOFD and phased array provided by the present invention.
图4是本发明提供的TOFD超声波检测的原理图。4 is a schematic diagram of the TOFD ultrasonic inspection provided by the present invention.
图5是本发明提供的椭圆数学模型的原理图。Figure 5 is a schematic diagram of an elliptical mathematical model provided by the present invention.
图6是本发明提供的进行TOFD超声波检测的结构示意图。Fig. 6 is a schematic view showing the structure of the TOFD ultrasonic inspection provided by the present invention.
图7是本发明提供的进行TOFD超声波检测的检测结果示意图。Fig. 7 is a schematic view showing the detection result of performing TOFD ultrasonic inspection provided by the present invention.
图8是本发明提供的相控阵超声波检测的原理图。Figure 8 is a schematic diagram of phased array ultrasonic inspection provided by the present invention.
图9是本发明提供的利用TOFD超声波进行横向缺陷检测第一个实施例的结构示意图。Fig. 9 is a schematic view showing the structure of a first embodiment of lateral defect detection using TOFD ultrasonic waves provided by the present invention.
图10是本发明提供的利用TOFD超声波进行横向缺陷检测第二个实施例的 结构示意图。Figure 10 is a second embodiment of the present invention for performing lateral defect detection using TOFD ultrasonic waves Schematic.
图11是本发明提供的基于TOFD和相控阵的超声波检测定位装置第一个实施例的结构方框图。Figure 11 is a block diagram showing the structure of a first embodiment of an ultrasonic detecting and positioning device based on TOFD and phased array provided by the present invention.
图12是本发明提供的基于TOFD和相控阵的超声波检测定位装置第二个实施例的结构方框图。Figure 12 is a block diagram showing the structure of a second embodiment of the ultrasonic detecting and positioning device based on TOFD and phased array provided by the present invention.
具体实施方式detailed description
为使本发明解决的技术问题、采用的技术方案和达到的技术效果更加清楚,下面将结合附图对本发明实施例的技术方案作进一步的详细描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。The technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only the present invention. Some embodiments, but not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
请参考图1,其是本发明提供的基于TOFD和相控阵的超声波检测定位方法第一个实施例的方法流程图。本发明实施例的基于TOFD和相控阵的超声波检测定位方法,可结合各类相控阵超声波探伤仪和TOFD超声波探伤仪使用。Please refer to FIG. 1 , which is a flowchart of a method for a first embodiment of an ultrasonic detection and positioning method based on TOFD and phased array provided by the present invention. The ultrasonic detecting and positioning method based on TOFD and phased array of the embodiment of the invention can be combined with various phased array ultrasonic flaw detectors and TOFD ultrasonic flaw detectors.
该基于TOFD和相控阵的超声波检测定位方法,包括:The method for ultrasonic detection and positioning based on TOFD and phased array includes:
步骤S101、使用TOFD超声波检测方法对焊缝进行扫查,确定出缺陷位置。In step S101, the weld seam is scanned using the TOFD ultrasonic inspection method to determine the defect position.
步骤S102、使用相控阵超声波检测方法对确定出的缺陷位置附近的焊缝进行扫查,标识出尺寸超过预设尺寸阈值的缺陷,并对标识出的缺陷进行定位。Step S102: Scanning the weld seam near the determined defect position by using the phased array ultrasonic detecting method, identifying the defect whose size exceeds the preset size threshold, and positioning the identified defect.
请参考图2,其是本发明提供的基于TOFD和相控阵的超声波检测定位方法进行检测的结构示意图。Please refer to FIG. 2 , which is a structural diagram of the method for detecting the ultrasonic detection and positioning method based on TOFD and phased array provided by the present invention.
其中,PAUT Probe表示相控阵超声波探头,TOFD Tx2表示发射超声波的发射探头,TOFD Rx2表示接收超声波的接收探头。弧形阴影区域分别表示焊缝及焊缝的镜像。斜线阴影区域分别表示相控阵超声波扇形扫查区域及TOFD超声波 的扫查区域。Among them, PAUT Probe represents a phased array ultrasonic probe, TOFD Tx2 represents a transmitting probe that emits ultrasonic waves, and TOFD Rx2 represents a receiving probe that receives ultrasonic waves. The curved shaded areas represent the welds and welds, respectively. The shaded area indicates the phased array ultrasonic sector scan area and TOFD ultrasound Scanning area.
本发明提供的基于TOFD和相控阵的超声波检测定位方法,超声波相控阵检测可以精确确定缺陷的水平方向和深度方向的位置信息,在与TOFD检测配合定位的过程中,以TOFD扫查为主、相控阵扫查为辅对焊缝缺陷进行精确定位,克服了TOFD扫查定位精度差、非平行扫查时横向缺陷难以检出的问题。The invention provides an ultrasonic detecting and positioning method based on TOFD and phased array, and the ultrasonic phased array detection can accurately determine the position information of the horizontal direction and the depth direction of the defect. In the process of coordinating with the TOFD detection, the TOFD scan is performed. The main and phased array scanning is used to accurately locate the weld defects, which overcomes the problem that the TOFD scan has poor positioning accuracy and the lateral defects are difficult to detect during non-parallel scanning.
请参考图3,其是本发明提供的基于TOFD和相控阵的超声波检测定位方法第二个实施例的方法流程图。本实施例与基于TOFD和相控阵的超声波检测定位方法第一个实施例的主要区别在于,增加了TOFD超声波检测和显示标识缺陷的具体步骤。Please refer to FIG. 3 , which is a flowchart of a method for the second embodiment of the TOFD and phased array based ultrasonic detection and positioning method provided by the present invention. The main difference between the present embodiment and the first embodiment of the ultrasonic detection and positioning method based on TOFD and phased array is that the specific steps of TOFD ultrasonic detection and display identification defects are added.
该基于TOFD和相控阵的超声波检测定位方法,包括:The method for ultrasonic detection and positioning based on TOFD and phased array includes:
步骤S201、在焊缝的一侧放置发射探头,焊缝的另一侧放置接收探头;Step S201, placing a transmitting probe on one side of the weld, and placing the receiving probe on the other side of the welded joint;
将所述接收探头接收到的从所述发射探头发出、经过缺陷的超声波衍射信号,代入预设的椭圆数学模型,计算求出缺陷位置;Substituting the ultrasonic diffraction signal received from the transmitting probe and passing through the defect by the receiving probe into a preset elliptical mathematical model to calculate a defect position;
其中,所述椭圆数学模型的椭圆焦点分别为发射探头位置和接收探头位置。The elliptical focus of the elliptical mathematical model is a transmitting probe position and a receiving probe position, respectively.
在钢结构工程无损检测领域,TOFD(衍射时差法)的工作原理为,应用超声波能量扫查探伤区域,若该区域存在缺陷则中断超声波能量的传播,从而在缺陷端部或端角引起所谓的衍射信号。该衍射信号是定向的,且可以在TOFD中、利用按照一发一收原则布置的相应的探头进行接收。In the field of non-destructive testing of steel structure engineering, TOFD (diffraction time difference method) works by applying ultrasonic energy to scan the inspection area. If there is a defect in the area, the propagation of ultrasonic energy is interrupted, thereby causing the so-called defect or end angle. Diffraction signal. The diffracted signal is directional and can be received in the TOFD using a corresponding probe arranged in accordance with the principle of one-to-one transmission.
请参考图4,其是本发明提供的TOFD超声波检测的原理图。Please refer to FIG. 4, which is a schematic diagram of TOFD ultrasonic detection provided by the present invention.
根据经过缺陷所产生的衍射信号到达接收探头的到达时间,可计算出该缺陷对应的深度和自身高度信息。但是在非平行扫查过程中,虽然能够精确测量缺陷的长度信息,却无法对缺陷的位置、深度和自身高度进行直接测定。一般 情况下,若在TOFD超声波检测过程中采用非平行扫查,最终根据缺陷的衍射信号的时间关系得到的位置信息都是建立在假定缺陷位于焊缝的中心线的基础之上。According to the arrival time of the diffraction signal generated by the defect to the receiving probe, the depth and self height information corresponding to the defect can be calculated. However, in the non-parallel scanning process, although the length information of the defect can be accurately measured, the position, depth and height of the defect cannot be directly measured. General In the case, if a non-parallel scan is used in the TOFD ultrasonic inspection process, the position information obtained based on the time relationship of the diffraction signal of the defect is based on the assumption that the defect is located on the center line of the weld.
请参考图5,其是本发明提供的椭圆数学模型的原理图。Please refer to FIG. 5, which is a schematic diagram of an elliptical mathematical model provided by the present invention.
TOFD超声波探伤仪记录发射探头发射超声波和接收探头接收到超声波衍射信号的时间,分别为t1和t2。基于t1和t2,相等时间的轨迹为t1+t2=ct。分别以两个探头为焦点、相等时间轨迹ct为到两焦点的距离之和,建立椭圆数学模型,缺陷就可能位于该椭圆上的任意一点。The TOFD ultrasonic flaw detector records the time at which the transmitting probe emits ultrasonic waves and the receiving probe receives the ultrasonic diffraction signals, which are respectively t1 and t2. Based on t1 and t2, the trajectory of equal time is t1+t2=c t . The elliptical mathematical model is established by taking the two probes as the focus and the equal time trajectory c t as the sum of the distances to the two focal points, and the defect may be located at any point on the ellipse.
基于该椭圆数学模型的TOFD超声波检测方法最终确定的缺陷都位于焊缝的中心线上,且缺陷的深度为dmax。但实际上,缺陷有可能并不位于该中心线上,而位于椭圆轨迹上的其他位置。在整个焊缝区域比较大的时候,基于上述定位方法确定的缺陷定位结果会降低后期钢件的合格率。The defects determined by the TOFD ultrasonic inspection method based on the elliptical mathematical model are all located on the center line of the weld, and the depth of the defect is dmax. But in reality, the defect may not be on the centerline, but in other locations on the elliptical trajectory. When the entire weld area is relatively large, the defect positioning result determined based on the above positioning method will lower the yield of the later steel parts.
请参考图6,其是本发明提供的进行TOFD超声波检测的结构示意图。基于该结构,利用TOFD超声波检测方法进行非平行扫查,可以获得焊缝的超声波检测结果图。请参考图7,其是本发明提供的进行TOFD超声波检测的检测结果示意图。该检测结果示意图中标示的1点、2点、3点分别对应结构示意图的焊缝的1点、2点、3点的实际位置。Please refer to FIG. 6 , which is a schematic structural diagram of performing TOFD ultrasonic detection provided by the present invention. Based on this structure, a non-parallel scan using the TOFD ultrasonic inspection method can obtain an ultrasonic inspection result map of the weld bead. Please refer to FIG. 7 , which is a schematic diagram of the detection result of performing TOFD ultrasonic detection provided by the present invention. The 1st, 2nd, and 3th points indicated in the schematic diagram of the test result correspond to the actual positions of the 1st, 2nd, and 3rd points of the weld of the structural schematic diagram.
步骤S202、将相控阵超声波探头设置于确定出的缺陷位置对应的发射探头的位置,使用相控阵超声波检测方法对焊缝进行扫查,标识出尺寸超过预设尺寸阈值的缺陷,并对标识出的缺陷进行定位。Step S202: setting the phased array ultrasonic probe to the position of the transmitting probe corresponding to the determined defect position, scanning the weld seam by using the phased array ultrasonic detecting method, and identifying the defect whose size exceeds the preset size threshold, and Identify the identified defects.
传统的常规超声检测方法对缺陷的水平位置以及深度测量有较高的精度,但它存在声束扩散角过窄,无法在定距离(探头前端距焊缝边缘的距离保持不变)扫查的情况下将焊缝区域全覆盖扫查,以便对缺陷进行定位的问题。所以只 能作为TOFD超声波检测过程中表面和底面盲区的检测的补充。Conventional conventional ultrasonic testing methods have higher accuracy for horizontal position and depth measurement of defects, but it has a narrow beam diffusion angle and cannot be scanned at a fixed distance (the distance between the front end of the probe and the edge of the weld remains unchanged). In the case of a full coverage of the weld area, the problem of positioning the defect. So only It can be used as a supplement to the detection of surface and bottom dead zones during TOFD ultrasonic testing.
相控阵超声波检测方法与常规超声波检测方法一样,也是依靠反射信号进行缺陷位置以及大小的测量,同样能得到缺陷准确的水平方向和深度方向的位置信息。不过相控阵超声波检测方法具有较大的扩散角,所以用相控阵超声波检测方法作为TOFD超声波检测过程之后的检测补充,相对传统的常规超声检测方法是更好地选择。The phased array ultrasonic detection method is the same as the conventional ultrasonic detection method. It also relies on the reflected signal to measure the position and size of the defect, and can also obtain the accurate horizontal and depth position information of the defect. However, the phased array ultrasonic detection method has a large diffusion angle, so the phased array ultrasonic detection method is used as a supplement after the TOFD ultrasonic detection process, and is better than the conventional conventional ultrasonic detection method.
请参考图8,其是本发明提供的相控阵超声波检测的原理图。Please refer to FIG. 8 , which is a schematic diagram of the phased array ultrasonic inspection provided by the present invention.
超声波相控阵扫查包括线扫阵扫查和扇形扫查。其中,扇形扫查又称超声波相控阵S扫查,对壁厚在10mm以下薄壁的对接焊缝或母材作单次扇形扫查,相控阵超声波束就可以覆盖整个被检焊缝或母材。对于中厚壁和厚壁的焊缝或母材以及更为复杂的结构,则需要作多次扇形扫查,相控阵超声波束才能覆盖整个被检焊缝或母材。Ultrasonic phased array scanning includes line sweep scanning and sector scanning. Among them, the fan-shaped scanning, also called the ultrasonic phased array S scanning, performs a single sector scanning on the thin-wall butt weld or the base material with a wall thickness of less than 10 mm, and the phased array ultrasonic beam can cover the entire tested weld. Or base metal. For medium and thick wall welds or base metal and more complex structures, multiple fan scans are required, and phased array ultrasonic beams cover the entire weld or base metal being inspected.
进行相控阵超声波扫查之前,需要对相控阵超声波探伤仪校准,校准的过程需要使用标准超声波探伤试块,相控阵超声波探伤过程中所有得出的缺陷当量值都是与标准相控阵超声波探伤试块比对而来的。绝大多数的标准相控阵超声波探伤试块都是符合国家标准的强制性规定的指定试块。Before the phased array ultrasonic scanning, the phased array ultrasonic flaw detector needs to be calibrated. The calibration process requires the use of standard ultrasonic flaw detection test blocks. All the equivalent defect values obtained during phased array ultrasonic flaw detection are compared with the standard phase. The array of ultrasonic testing blocks was compared. The vast majority of standard phased array ultrasonic testing blocks are designated test blocks that meet the mandatory requirements of national standards.
进行相控阵超声波扫查时,相控阵超声波扇扫区域可覆盖焊缝,相控阵超声波探伤仪可根据扇扫图,精确得出缺陷的水平方向和深度方向的位置信息。在实际的焊缝超声波检测过程中,以TOFD超声波扫查(非平行扫查和横向缺陷扫查)为主,以相控阵超声波扫查为辅进行缺陷精确定位,克服了TOFD超声波扫查定位精度差的问题,同时又能兼顾解决横向缺陷扫查难以检出的问题。When the phased array ultrasonic scanning is performed, the phased array ultrasonic fan sweeping area can cover the weld seam, and the phased array ultrasonic flaw detector can accurately obtain the position information of the horizontal direction and the depth direction of the defect according to the fan sweeping map. In the actual ultrasonic testing of welds, TOFD ultrasonic scanning (non-parallel scanning and lateral defect scanning) is mainly used, and phased array ultrasonic scanning is used as the auxiliary to accurately locate the defects, which overcomes the TOFD ultrasonic scanning and positioning. The problem of poor precision can also solve the problem that it is difficult to detect the lateral defect scan.
优选地,所述发射探头发射的超声波束和接收探头接收的超声波束位于同一条直线上、且该直线与所述焊缝成30-75°夹角,或所述发射探头发射的超 声波束和接收探头接收的超声波束成90°夹角。Preferably, the ultrasonic beam emitted by the transmitting probe and the ultrasonic beam received by the receiving probe are on the same straight line, and the straight line is at an angle of 30-75° with the weld, or the transmitting probe transmits an ultra The acoustic beam is at an angle of 90° to the ultrasonic beam received by the receiving probe.
请参考图9和图10,其分别是本发明提供的利用TOFD超声波进行横向缺陷检测第一个实施例的结构示意图和第二个实施例的结构示意图。Please refer to FIG. 9 and FIG. 10 , which are respectively a structural schematic diagram of a first embodiment of lateral defect detection using TOFD ultrasonic waves provided by the present invention, and a schematic structural view of a second embodiment.
为了解决TOFD超声波检测方法非平行扫查时对横向缺陷的检出率低和难以判断的问题,我们提供了两个方案进行横向缺陷的检测,分别为对边斜线扫查和V型扫查。In order to solve the problem that the detection rate of lateral defects is low and difficult to judge when the TOFD ultrasonic inspection method is not parallel, we provide two schemes for the detection of lateral defects, which are oblique scanning and V-scan. .
对边斜线扫查对应本发明提供的利用TOFD超声波进行横向缺陷检测第一个实施例。在对边斜线扫查过程当中,发射探头Tx2发射的超声波束和接收探头Rx2接收的超声波束位于同一条直线上、且该直线与所述焊缝成30-75°夹角。该夹角最好不小于45°,优选为45°。采用对边斜线扫查能够保证在发射探头Tx2发射的超声波束和接收探头Rx2接收的超声波束的连线方向上,探测的横向缺陷不再是一条线状,而具有一定面积,这样就能有较大的面产生较强的衍射信号,且缺陷有了一定的长度显示,更便于发现缺陷。The side oblique line scan corresponds to the first embodiment of the lateral defect detection using TOFD ultrasonic waves provided by the present invention. During the diagonal scanning process, the ultrasonic beam emitted by the transmitting probe Tx2 and the ultrasonic beam received by the receiving probe Rx2 are on the same straight line, and the straight line forms an angle of 30-75° with the welded seam. The angle is preferably not less than 45°, preferably 45°. The diagonal line scan can ensure that the detected transverse defects are no longer a line and have a certain area in the direction of the connection between the ultrasonic beam emitted by the transmitting probe Tx2 and the ultrasonic beam received by the receiving probe Rx2, so that A larger surface produces a stronger diffraction signal, and the defect has a certain length display, which makes it easier to find defects.
V型扫查对应本发明提供的利用TOFD超声波进行横向缺陷检测第二个实施例。经过多次试验,发现发射探头Tx2发射的超声波束和接收探头Rx2接收的超声波束的夹角为90°,任一超声波束与焊缝成45°夹角时,发射探头Tx2发射的超声波束与缺陷界面作用的时间最长,缺陷最易识别。The V-type scan corresponds to the second embodiment of the lateral defect detection using the TOFD ultrasonic wave provided by the present invention. After several tests, it is found that the angle between the ultrasonic beam emitted by the transmitting probe Tx2 and the ultrasonic beam received by the receiving probe Rx2 is 90°, and when any ultrasonic beam is at an angle of 45° with the weld, the ultrasonic beam emitted by the transmitting probe Tx2 is The defect interface takes the longest time and the defect is most easily identified.
另外,采用上述两种方式进行超声波扫查时,还可以增设一套常用的非平行扫查。如图中所示的,发射探头Tx1和接收探头Rx1,通过对边斜线扫查或V型扫查与常用的非平行扫查的结合,我们能发现各个方向上的缺陷,再辅助相控阵超声波扇扫或线扫阵检测,可以保证相控阵超声波束覆盖整个所要检测的焊缝区域,在检测过程中实现稳定、全面的缺陷扫查与定位。In addition, when using the above two methods for ultrasonic scanning, a common set of non-parallel scans can be added. As shown in the figure, the transmitting probe Tx1 and the receiving probe Rx1, through the combination of edge oblique scanning or V-scan and common non-parallel scanning, we can find defects in various directions, and then assist phase control. Array ultrasonic sweep or line sweep detection can ensure that the phased array ultrasonic beam covers the entire weld area to be detected, and achieves stable and comprehensive defect scanning and positioning during the inspection process.
步骤S203、在相控阵扇扫图或相控阵线扫图中显示标识出的缺陷。 Step S203, displaying the identified defects in the phased array fan scan or the phased array scan.
优选的,显示标识出的缺陷包括缺陷、缺陷的个数、缺陷间相对位置、缺陷类型、缺陷的高度及宽度等信息。Preferably, the defects identified by the display include defects, the number of defects, the relative position between the defects, the type of the defect, the height and width of the defect, and the like.
本发明提供的基于TOFD和相控阵的超声波检测定位方法,可自动查找缺陷并直观的查阅缺陷。且该方法确定的缺陷位置精确,极大的减少了对操作人员主观判断的依赖,降低误判率。The invention provides an ultrasonic detection and positioning method based on TOFD and phased array, which can automatically find defects and intuitively inspect defects. Moreover, the defect position determined by the method is accurate, which greatly reduces the dependence on the operator's subjective judgment and reduces the false positive rate.
以下为本发明实施例提供的基于TOFD和相控阵的超声波检测定位装置的实施例。基于TOFD和相控阵的超声波检测定位装置的实施例与上述的基于TOFD和相控阵的超声波检测定位方法实施例属于同一构思,基于TOFD和相控阵的超声波检测定位装置的实施例中未详尽描述的细节内容,可以参考上述基于TOFD和相控阵的超声波检测定位方法实施例。The following is an embodiment of an ultrasonic detecting and positioning device based on TOFD and phased array provided by an embodiment of the present invention. The embodiment of the ultrasonic detecting and positioning device based on the TOFD and the phased array is the same as the above-described embodiment of the ultrasonic detecting and positioning method based on the TOFD and the phased array, and the embodiment of the ultrasonic detecting and positioning device based on the TOFD and the phased array is not For details of the detailed description, reference may be made to the above-described embodiments of the ultrasonic detection and positioning method based on TOFD and phased array.
请参考图11,其是本发明提供的基于TOFD和相控阵的超声波检测定位装置第一个实施例的结构方框图。Please refer to FIG. 11, which is a structural block diagram of a first embodiment of an ultrasonic detecting and positioning device based on TOFD and phased array provided by the present invention.
该基于TOFD和相控阵的超声波检测定位装置,包括:The ultrasonic detecting and positioning device based on TOFD and phased array includes:
TOFD检测单元10,用于使用TOFD超声波检测方法对焊缝进行扫查,确定出缺陷位置;The TOFD detecting unit 10 is configured to scan the weld seam by using the TOFD ultrasonic detecting method to determine the defect position;
相控阵检测单元20,用于使用相控阵超声波检测方法对确定出的缺陷位置附近的焊缝进行扫查,标识出尺寸超过预设尺寸阈值的缺陷,并对标识出的缺陷进行定位。The phased array detecting unit 20 is configured to scan the weld bead near the determined defect position by using the phased array ultrasonic detecting method, identify the defect whose size exceeds the preset size threshold, and locate the identified defect.
本发明提供的基于TOFD和相控阵的超声波检测定位装置,超声波相控阵检测可以精确确定缺陷的水平方向和深度方向的位置信息,在与TOFD检测配合定位的过程中,以TOFD扫查为主、相控阵扫查为辅对焊缝缺陷进行精确定位,克服了TOFD扫查定位精度差、非平行扫查时横向缺陷难以检出的问题。The invention provides an ultrasonic detecting and positioning device based on TOFD and phased array, and the ultrasonic phased array detection can accurately determine the position information of the horizontal direction and the depth direction of the defect. In the process of coordinating with the TOFD detection, the TOFD scan is performed. The main and phased array scanning is used to accurately locate the weld defects, which overcomes the problem that the TOFD scan has poor positioning accuracy and the lateral defects are difficult to detect during non-parallel scanning.
请参考图12,其是本发明提供的基于TOFD和相控阵的超声波检测定位装置 第二个实施例的结构方框图。本实施例与基于TOFD和相控阵的超声波检测定位装置第一个实施例的主要区别在于,增加了显示单元30。Please refer to FIG. 12 , which is an ultrasonic detecting and positioning device based on TOFD and phased array provided by the present invention. A block diagram of the structure of the second embodiment. The main difference between the present embodiment and the first embodiment of the ultrasonic detecting and positioning device based on TOFD and phased array is that the display unit 30 is added.
该基于TOFD和相控阵的超声波检测定位装置,包括:The ultrasonic detecting and positioning device based on TOFD and phased array includes:
TOFD检测单元10,用于使用TOFD超声波检测方法对焊缝进行扫查,确定出缺陷位置;The TOFD detecting unit 10 is configured to scan the weld seam by using the TOFD ultrasonic detecting method to determine the defect position;
相控阵检测单元20,用于使用相控阵超声波检测方法对确定出的缺陷位置附近的焊缝进行扫查,标识出尺寸超过预设尺寸阈值的缺陷,并对标识出的缺陷进行定位。The phased array detecting unit 20 is configured to scan the weld bead near the determined defect position by using the phased array ultrasonic detecting method, identify the defect whose size exceeds the preset size threshold, and locate the identified defect.
其中,所述TOFD检测单元10,具体用于:The TOFD detecting unit 10 is specifically configured to:
在焊缝的一侧放置发射探头,焊缝的另一侧放置接收探头;Place a launch probe on one side of the weld and a receiving probe on the other side of the weld;
将所述接收探头接收到的从所述发射探头发出、经过缺陷的超声波衍射信号,代入预设的椭圆数学模型,计算求出缺陷位置;Substituting the ultrasonic diffraction signal received from the transmitting probe and passing through the defect by the receiving probe into a preset elliptical mathematical model to calculate a defect position;
其中,所述椭圆数学模型的椭圆焦点分别为发射探头位置和接收探头位置。The elliptical focus of the elliptical mathematical model is a transmitting probe position and a receiving probe position, respectively.
其中,所述发射探头发射的超声波束和接收探头接收的超声波束位于同一条直线上、且该直线与所述焊缝成30-75°夹角,或所述发射探头发射的超声波束和接收探头接收的超声波束成90°夹角。Wherein the ultrasonic beam emitted by the transmitting probe and the ultrasonic beam received by the receiving probe are on the same straight line, and the straight line is at an angle of 30-75° with the welding seam, or the ultrasonic beam and the transmitting beam emitted by the transmitting probe The ultrasonic beam received by the probe is at an angle of 90°.
其中,所述基于TOFD和相控阵的超声波检测定位装置,还包括显示单元30,所述显示单元30,用于在相控阵扇扫图或相控阵线扫图中显示标识出的缺陷。The ultrasonic detection and positioning device based on the TOFD and the phased array further includes a display unit 30, and the display unit 30 is configured to display the identified defects in the phased array fan scan or the phased array scan.
其中,所述使用相控阵超声波检测方法对确定出的缺陷位置附近的焊缝进行扫查,包括:Wherein, the phased array ultrasonic detecting method is used to scan the weld seam near the determined defect position, including:
将相控阵超声波探头设置于确定出的缺陷位置对应的发射探头的位置,使 用相控阵超声波检测方法对焊缝进行扫查。Setting the phased array ultrasonic probe to the position of the transmitting probe corresponding to the determined defect position, so that The weld seam was scanned by phased array ultrasonic inspection.
本发明提供的基于TOFD和相控阵的超声波检测定位装置,可自动查找缺陷并直观的查阅缺陷。且该方法确定的缺陷位置精确,极大的减少了对操作人员主观判断的依赖,降低误判率。The invention provides an ultrasonic detecting and positioning device based on TOFD and phased array, which can automatically find defects and intuitively inspect defects. Moreover, the defect position determined by the method is accurate, which greatly reduces the dependence on the operator's subjective judgment and reduces the false positive rate.
一种基于TOFD和相控阵的超声波检测定位方法、装置,以TOFD扫查为主、相控阵扫查为辅对焊缝缺陷进行精确定位,克服了TOFD扫查定位精度差、非平行扫查时横向缺陷难以检出的问题。Ultrasonic detection and positioning method and device based on TOFD and phased array, with TOFD scanning as the main and phased array scanning as the auxiliary for precise positioning of weld defects, overcoming TOFD scanning and positioning accuracy, non-parallel scanning It is difficult to detect lateral defects when checking.
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成,也可以通过程序来指令相关的硬件完成,该程序可以存储于一计算机可读存储介质中,存储介质可以包括存储器、磁盘或光盘等。A person skilled in the art can understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be executed by a program to execute related hardware. The program may be stored in a computer readable storage medium, and the storage medium may include Memory, disk or disc, etc.
以上内容仅为本发明的较佳实施例,对于本领域的普通技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改变之处,本说明书内容不应理解为对本发明的限制。 The above content is only a preferred embodiment of the present invention, and those skilled in the art will have a change in the specific embodiment and application scope according to the idea of the present invention. The content of the present specification should not be construed as the present invention. limits.

Claims (10)

  1. 一种基于TOFD和相控阵的超声波检测定位方法,包括:An ultrasonic detection and positioning method based on TOFD and phased array, comprising:
    使用TOFD超声波检测方法对焊缝进行扫查,确定出缺陷位置;The weld seam is scanned using the TOFD ultrasonic inspection method to determine the defect position;
    使用相控阵超声波检测方法对确定出的缺陷位置附近的焊缝进行扫查,标识出尺寸超过预设尺寸阈值的缺陷,并对标识出的缺陷进行定位。The phased array ultrasonic inspection method is used to scan the welds near the determined defect position, identify the defects whose size exceeds the preset size threshold, and locate the identified defects.
  2. 根据权利要求1所述的基于TOFD和相控阵的超声波检测定位方法,其中,所述使用TOFD超声波检测方法对焊缝进行扫查,确定出缺陷位置,包括:The TOFD and phased array based ultrasonic detecting and positioning method according to claim 1, wherein the TOFD ultrasonic detecting method is used to scan the weld to determine the defect position, including:
    在焊缝的一侧放置发射探头,焊缝的另一侧放置接收探头;Place a launch probe on one side of the weld and a receiving probe on the other side of the weld;
    将所述接收探头接收到的从所述发射探头发出、经过缺陷的超声波衍射信号,代入预设的椭圆数学模型,计算求出缺陷位置;Substituting the ultrasonic diffraction signal received from the transmitting probe and passing through the defect by the receiving probe into a preset elliptical mathematical model to calculate a defect position;
    其中,所述椭圆数学模型的椭圆焦点分别为发射探头位置和接收探头位置。The elliptical focus of the elliptical mathematical model is a transmitting probe position and a receiving probe position, respectively.
  3. 根据权利要求2所述的基于TOFD和相控阵的超声波检测定位方法,其中,所述发射探头发射的超声波束和接收探头接收的超声波束位于同一条直线上、且该直线与所述焊缝成30-75°夹角,或所述发射探头发射的超声波束和接收探头接收的超声波束成90°夹角。The method according to claim 2, wherein the ultrasonic beam emitted by the transmitting probe and the ultrasonic beam received by the receiving probe are on the same straight line, and the straight line and the welded seam are The angle is 30-75°, or the ultrasonic beam emitted by the transmitting probe and the ultrasonic beam received by the receiving probe are at an angle of 90°.
  4. 根据权利要求1所述的基于TOFD和相控阵的超声波检测定位方法,其中,所述标识出尺寸超过预设尺寸阈值的缺陷,并对标识出的缺陷进行定位之后,还包括:在相控阵扇扫图或相控阵线扫图中显示标识出的缺陷。The TOFD and phased array based ultrasonic detection and positioning method according to claim 1, wherein the identifying a defect whose size exceeds a preset size threshold and positioning the identified defect further comprises: phase control The identified defects are displayed in the fan sweep or phased sweep scan.
  5. 根据权利要求1所述的基于TOFD和相控阵的超声波检测定位方法,其中,所述使用相控阵超声波检测方法对确定出的缺陷位置附近的焊缝进行扫查,包括:The TOFD and phased array based ultrasonic detecting and positioning method according to claim 1, wherein the phased array ultrasonic detecting method performs a scan on the weld near the determined defect position, including:
    将相控阵超声波探头设置于确定出的缺陷位置对应的发射探头的位置,使用相控阵超声波检测方法对焊缝进行扫查。 The phased array ultrasonic probe is placed at the position of the transmitting probe corresponding to the determined defect position, and the weld is scanned using the phased array ultrasonic detecting method.
  6. 一种基于TOFD和相控阵的超声波检测定位装置,包括:An ultrasonic detecting and positioning device based on TOFD and phased array, comprising:
    TOFD检测单元,用于使用TOFD超声波检测方法对焊缝进行扫查,确定出缺陷位置;The TOFD detecting unit is configured to scan the weld seam by using the TOFD ultrasonic detecting method to determine the defect position;
    相控阵检测单元,用于使用相控阵超声波检测方法对确定出的缺陷位置附近的焊缝进行扫查,标识出尺寸超过预设尺寸阈值的缺陷,并对标识出的缺陷进行定位。The phased array detecting unit is configured to scan the weld bead near the determined defect position by using the phased array ultrasonic detecting method, identify the defect whose size exceeds the preset size threshold, and locate the identified defect.
  7. 根据权利要求6所述的基于TOFD和相控阵的超声波检测定位装置,其中,所述TOFD检测单元,具体用于:The TOFD and phased array based ultrasonic detecting and positioning device according to claim 6, wherein the TOFD detecting unit is specifically configured to:
    在焊缝的一侧放置发射探头,焊缝的另一侧放置接收探头;Place a launch probe on one side of the weld and a receiving probe on the other side of the weld;
    将所述接收探头接收到的从所述发射探头发出、经过缺陷的超声波衍射信号,代入预设的椭圆数学模型,计算求出缺陷位置;Substituting the ultrasonic diffraction signal received from the transmitting probe and passing through the defect by the receiving probe into a preset elliptical mathematical model to calculate a defect position;
    其中,所述椭圆数学模型的椭圆焦点分别为发射探头位置和接收探头位置。The elliptical focus of the elliptical mathematical model is a transmitting probe position and a receiving probe position, respectively.
  8. 根据权利要求7所述的基于TOFD和相控阵的超声波检测定位装置,其中,The ultrasonic detecting and positioning device based on TOFD and phased array according to claim 7, wherein
    所述发射探头发射的超声波束和接收探头接收的超声波束位于同一条直线上、且该直线与所述焊缝成30-75°夹角,或所述发射探头发射的超声波束和接收探头接收的超声波束成90°夹角。The ultrasonic beam emitted by the transmitting probe and the ultrasonic beam received by the receiving probe are on the same straight line, and the straight line forms an angle of 30-75° with the welding seam, or the ultrasonic beam and the receiving probe received by the transmitting probe receive The ultrasonic beam is at an angle of 90°.
  9. 根据权利要求6所述的基于TOFD和相控阵的超声波检测定位装置,其中,所述基于TOFD和相控阵的超声波检测定位装置,还包括显示单元,所述显示单元,用于在相控阵扇扫图或相控阵线扫图中显示标识出的缺陷。The ultrasonic detecting and positioning device based on TOFD and phased array according to claim 6, wherein the ultrasonic detecting and positioning device based on TOFD and phased array further comprises a display unit, and the display unit is used for phase control The identified defects are displayed in the fan sweep or phased sweep scan.
  10. 根据权利要求6所述的基于TOFD和相控阵的超声波检测定位装置,其中,所述使用相控阵超声波检测方法对确定出的缺陷位置附近的焊缝进行扫 查,包括:The TOFD and phased array based ultrasonic detecting and positioning device according to claim 6, wherein said phased array ultrasonic detecting method is used to scan a weld near the determined defect position. Check, including:
    将相控阵超声波探头设置于确定出的缺陷位置对应的发射探头的位置,使用相控阵超声波检测方法对焊缝进行扫查。 The phased array ultrasonic probe is placed at the position of the transmitting probe corresponding to the determined defect position, and the weld is scanned using the phased array ultrasonic detecting method.
PCT/CN2016/070606 2015-04-02 2016-01-11 Ultrasonic detection and locating method and device based on tofd and phased array WO2016155403A1 (en)

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