阅读说明：本技术 一种数字化选取相控阵换能器检测参数的方法 (Method for digitally selecting phased array transducer detection parameters ) 是由 高世凯 蔡瑞 杨东海 李学雷 张鑫 熊然 魁国祯 田俍媛 张峰 徐浩天 王宁宁 于 2021-08-16 设计创作，主要内容包括：本发明一种数字化选取相控阵换能器检测参数的方法,属于工业无损检测领域；通过基于COMSOL软件的计算机仿真技术,建立相控阵换能器参数优化选取模型,针对不同材料,通过设计换能器仿真正交实验,快速得到换能器最佳检测参数,达到相控阵无损检测工艺参数的数字化选取。本发明检测参数选取方案简单易实施,不需要进行大量缺陷试块的制作,在换能器检测参数选取领域可替代人工缺陷试块；通过换能器检测参数正交试验分析,由图9均值主效应曲线可知,正交实验分析最优组合参数为A-(2)B-(3)C-(3)D-(2),图5为换能器检测声场指向性曲线,声场旁瓣较少,未出现栅瓣,声场指向性效果佳。(The invention relates to a method for digitally selecting detection parameters of a phased array transducer, belonging to the field of industrial nondestructive detection; a phased array transducer parameter optimization selection model is established through a computer simulation technology based on COMSOL software, and the optimal detection parameters of the transducer are quickly obtained through designing a transducer simulation orthogonal experiment aiming at different materials, so that the digital selection of the phased array nondestructive detection process parameters is achieved. The detection parameter selection scheme is simple and easy to implement, does not need to manufacture a large number of defect test blocks, and can replace artificial defect test blocks in the field of transducer detection parameter selection; through the orthogonal experimental analysis of transducer detection parameters, the optimal combination parameter of the orthogonal experimental analysis is A as shown by the main effect curve of the mean value in figure 9 2 B 3 C 3 D 2 Fig. 5 is a sound field directivity curve detected by the transducer, and the sound field directivity effect is good because the side lobe of the sound field is less and no grating lobe is generated.)

1. A method for digitally selecting detection parameters of a phased array transducer is characterized by comprising the following specific steps:

the method comprises the following steps: establishing a three-dimensional model of phased array ultrasonic detection by adopting software, and obtaining a change rule of a detection sound field under corresponding transducer parameters through simulation detection sound field analysis;

step two: performing orthogonal analysis on the simulation detection sound field result, and giving parameters of excitation frequency f, array element width d, array element number M and array element gap s of the optimal phased array transducer under the corresponding detection material;

step three: and D, carrying out transducer detection verification tests on the corresponding materials according to the excitation frequency f of the transducer, the width d of the array elements, the number M of the array elements and the parameters of the array element gaps s under the corresponding detection materials in the step II, and verifying the accuracy of the simulation detection sound field result.

2. The method of digitally selecting phased array transducer sensing parameters of claim 1 wherein: in the first step, a geometric module of COMSOL simulation software is adopted to establish a three-dimensional model of the phased array ultrasonic simulation detection transducer 1: 1.

3. The method of digitally selecting phased array transducer sensing parameters of claim 2, wherein: in the first step, the specific steps of obtaining the change rule of the detection sound field under the corresponding transducer parameters through simulation detection sound field analysis are as follows:

step 1: setting corresponding materials for each part of the three-dimensional model according to the actual operation condition of phased array ultrasonic detection;

step 2: according to the actual operation condition of the phased array ultrasonic detection, and in combination with the simulated boundary conditions, applying corresponding detection ultrasonic beams to the phased array ultrasonic detection three-dimensional model;

and step 3: carrying out grid division on the three-dimensional model, and dividing the three-dimensional model into a plurality of solving units;

and 4, step 4: calculating the ultrasonic sound field parameters of each solving unit one by one to obtain a sound field intensity distribution diagram reflecting the ultrasonic sound field change rule detected by the transducer;

and 5: corresponding sound field energy Q to different transducer parameters_AEffective area Q_BAnd directivity Q_CPerforming orthogonal analysis, performing Matlab sound field visualization analysis according to a phased array transducer mathematical model, performing transducer detection sound field weight analysis on three indexes of sound field energy, effective area and directivity to obtain each index weight as sound field energy Q_A40% effective area Q_B20% directivity Q_CAnd 40%, analyzing to obtain optimal transducer detection parameters corresponding to different materials.

4. The method of digitally selecting phased array transducer sensing parameters of claim 1 wherein: and step three, arranging the optimal phased array transducer detection parameters corresponding to different materials, establishing a transducer detection parameter database corresponding to different materials, and facilitating quick selection of the phased array transducer detection parameters in practical application.

Technical Field

The invention belongs to the field of industrial nondestructive testing, and particularly relates to a method for digitally selecting phased array transducer detection parameters.

Background

The phased array ultrasonic nondestructive testing technology is widely applied to the field of nondestructive testing with the advantages of strong applicability, strong intuition of testing results, convenience, high efficiency, complete reproduction of defect information and realization of multiple display modes. The phased array transducer is used as a core component of the detection system, and efficient and accurate selection of parameters of the phased array transducer is an important guarantee that a detection result is real and reliable.

It can be known from patent CN209248850U that, in the current method for selecting phased array transducer detection parameters, standard test blocks with various defect types are manufactured mainly through standard test block process tests, and multiple detections are performed, and appropriate detection process parameters are selected by comparing and analyzing detection data and the positions and types of the test block defects, so that the problems of large workload, low efficiency and poor manual defect representativeness exist.

Disclosure of Invention

The technical problem to be solved is as follows:

in order to avoid the defects of the prior art, the invention provides a method for digitally selecting the detection parameters of a phased array transducer, and solves the problems of high cost and low efficiency of the phased array transducer parameter selection. A phased array transducer parameter optimization selection model is established through a computer simulation technology based on COMSOL software, and the optimal detection parameters of the transducer are quickly obtained through designing a transducer simulation orthogonal experiment aiming at different materials, so that the digital selection of the phased array nondestructive detection process parameters is achieved.

The technical scheme of the invention is as follows: a method for digitally selecting detection parameters of a phased array transducer is characterized by comprising the following specific steps:

the method comprises the following steps: establishing a three-dimensional model of phased array ultrasonic detection by adopting software, and obtaining a change rule of a detection sound field under corresponding transducer parameters through simulation detection sound field analysis;

step two: performing orthogonal analysis on the simulation detection sound field result, and giving parameters of excitation frequency f, array element width d, array element number M and array element gap s of the optimal phased array transducer under the corresponding detection material;

step three: and D, carrying out transducer detection verification tests on the corresponding materials according to the excitation frequency f of the transducer, the width d of the array elements, the number M of the array elements and the parameters of the array element gaps s under the corresponding detection materials in the step II, and verifying the accuracy of the simulation detection sound field result.

The further technical scheme of the invention is as follows: in the first step, a geometric module of COMSOL simulation software is adopted to establish a three-dimensional model of the phased array ultrasonic simulation detection transducer 1: 1.

The further technical scheme of the invention is as follows: in the first step, the specific steps of obtaining the change rule of the detection sound field under the corresponding transducer parameters through simulation detection sound field analysis are as follows:

step 1: setting corresponding materials for each part of the three-dimensional model according to the actual operation condition of phased array ultrasonic detection;

step 2: according to the actual operation condition of the phased array ultrasonic detection, and in combination with the simulated boundary conditions, applying corresponding detection ultrasonic beams to the phased array ultrasonic detection three-dimensional model;

and step 3: carrying out grid division on the three-dimensional model, and dividing the three-dimensional model into a plurality of solving units;

and 4, step 4: calculating the ultrasonic sound field parameters of each solving unit one by one to obtain a sound field intensity distribution diagram reflecting the ultrasonic sound field change rule detected by the transducer;

and 5: for differentEnergy Q of sound field corresponding to transducer parameters_AEffective area Q_BAnd directivity Q_CPerforming orthogonal analysis, performing Matlab sound field visualization analysis according to a phased array transducer mathematical model, performing transducer detection sound field weight analysis on three indexes of sound field energy, effective area and directivity to obtain each index weight as sound field energy Q_A40% effective area Q_B20% directivity Q_CAnd 40%, analyzing to obtain optimal transducer detection parameters corresponding to different materials.

The further technical scheme of the invention is as follows: and step three, arranging the optimal phased array transducer detection parameters corresponding to different materials, establishing a transducer detection parameter database corresponding to different materials, and facilitating quick selection of the phased array transducer detection parameters in practical application.

Advantageous effects

The invention has the beneficial effects that:

1. aiming at the method for selecting detection parameters by manually comparing test blocks at present, the detection parameter selection scheme of the invention is simple and easy to implement, does not need to manufacture a large number of defect test blocks, and can replace manual defect test blocks in the field of transducer detection parameter selection;

2. through the orthogonal experimental analysis of transducer detection parameters, the optimal combination parameter of the orthogonal experimental analysis is A as shown by the main effect curve of the mean value in figure 9₂B₃C₃D₂Fig. 5 is a sound field directivity curve detected by the transducer, and the sound field directivity effect is good because the side lobe of the sound field is less and no grating lobe is generated. Therefore, the digital selection of the transducer detection parameters can be realized through a computer simulation detection technology, so that the detection parameters are convenient and accurate to select, and the intelligent degree is high;

3. after a large number of computer simulation researches and verifications are carried out, a phased array transducer detection parameter database can be established, and the phased array transducer detection parameter database can be quickly applied to actual production tasks on the premise of meeting detection schemes.

Drawings

FIG. 1 is a flow chart of a fast selection and study method for phased array transducer test parameters;

FIG. 2 is a flow chart of the phased array transducer for detecting a three-dimensional model of a sound field according to an embodiment of the present invention;

FIG. 3 is a three-dimensional model of a detection sound field of a phased array transducer in an embodiment of the present invention, where the excitation frequency f of the phased array transducer is 5MHz, the width d of an array element is 0.4mm, the number M of the array elements is 16, and the gap s between the array elements is 0.1 mm;

FIG. 4 is a two-dimensional model of the transducer detection sound field range when the excitation frequency f of the phased array transducer is 5MHz, the width d of the array element is 0.4mm, the number M of the array elements is 16 and the gap s of the array elements is 0.1mm according to the embodiment of the invention;

FIG. 5 is a directional curve of a sound field detected by the phased array transducer when the excitation frequency f of the phased array transducer is 5MHz, the width d of an array element is 0.4mm, the number M of the array elements is 16 and the gap s of the array elements is 0.1mm according to the embodiment of the invention;

FIG. 6 shows a three-dimensional model of a detection sound field of a phased array transducer when the excitation frequency f of the phased array transducer is 5MHz, the width d of an array element is 0.8mm, the number M of the array elements is 32, and the gap s of the array elements is 0.2mm according to an embodiment of the invention;

FIG. 7 is a two-dimensional model of the acoustic field range of the phased array transducer in the embodiment of the present invention when the excitation frequency f of the phased array transducer is 5MHz, the width d of the array element is 0.8mm, the number M of the array elements is 32, and the gap s of the array element is 0.2 mm;

FIG. 8 is a directional curve of a sound field detected by the phased array transducer when the excitation frequency f of the phased array transducer is 5MHz, the width d of the array element is 0.8mm, the number M of the array elements is 32, and the gap s of the array elements is 0.2mm according to the embodiment of the invention;

FIG. 9 is a mean dominant effect curve of a phased array transducer simulation test sound field orthogonality experiment in accordance with an embodiment of the present invention.

Detailed Description

The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The invention aims to provide a method for digitally selecting detection parameters of a phased array transducer, which utilizes COMSOL simulation software to carry out accurate and scientific three-dimensional modeling on an ultrasonic simulation detection sound field of the phased array transducer, analyzes the optimal transducer parameters aiming at different materials, and quickly obtains the optimal parameters of the phased array transducer aiming at different materials through orthogonal experimental analysis.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Fig. 1 is a flowchart of a fast phased array transducer detection parameter selection research method, and as shown in fig. 1, the research method for fast selecting phased array transducer parameters based on cmos sol simulation software provided by the present invention includes the following steps:

s1) establishing a three-dimensional model of phased array ultrasonic detection by using COMSOL simulation software, and obtaining a change rule of a detection sound field under corresponding transducer parameters through simulation detection sound field analysis, wherein the modeling process is shown in FIG. 2;

s2) carrying out orthogonal analysis on the simulation detection sound field result to give out the optimal transducer detection parameters under the corresponding detection material;

s3), according to the optimal transducer detection parameters under the corresponding detection materials in the step S2, carrying out transducer detection verification tests on the corresponding materials, and verifying the accuracy of the simulation detection sound field results.

The method comprises the following steps of establishing a three-dimensional model of phased array ultrasonic detection by using COMSOL simulation software, and obtaining a change rule of a detection sound field under corresponding transducer parameters, wherein the method specifically comprises the following steps:

s101) establishing a three-dimensional model of a phased array ultrasonic simulation detection transducer 1:1 by adopting a geometric module of COMSOL simulation software;

s102) setting corresponding materials for each part of the three-dimensional model according to the actual operation condition of phased array ultrasonic detection;

s103) according to the actual operation condition of the phased array ultrasonic detection, applying corresponding detection ultrasonic beams to the phased array ultrasonic detection three-dimensional model by combining simulated boundary conditions;

s104) comprehensively considering the operation precision and time, carrying out grid division on the three-dimensional model, and dividing the three-dimensional model into a plurality of solving units;

s105) calculating the ultrasonic sound field parameters of each solving unit one by one to obtain a sound field intensity distribution map reflecting the ultrasonic sound field change rule detected by the transducer;

s106) corresponding to sound field energy Q for different transducer parameters_AEffective area Q_BAnd directivity Q_CAnd performing orthogonal analysis to obtain optimal transducer detection parameters corresponding to different materials.

And carrying out phased array ultrasonic detection verification tests on the corresponding materials to verify the accuracy of the simulation detection sound field model.

The optimal phased array transducer detection parameters corresponding to different materials are sorted, a transducer detection parameter database corresponding to different materials is established, and the phased array transducer detection parameters are conveniently and quickly selected in practical application.

Specifically, the step 106 specifically includes: the selected indexes for representing the sound field are respectively the sound field energy Q_AEffective area Q_BAnd directivity Q_CThe weights of the indexes are the sound field energy Q_A40% effective area Q_B20% directivity Q_CAnd 40 percent, respectively scoring each index of each group of tests, and then carrying out weighted comprehensive calculation scoring according to the weight.

The overall score for each set of experiments was: y is 0.4 XQ_A+0.2×(6×Q_B)+0.4×(100×Q_C) Taking test No. 1 as an example, the test results of test No. 1 in fig. 3, 4 and 5 are subjected to comprehensive scoring to obtain: y is₁0.4 × 54+0.2 × (6 × 2.3) +0.4 × (100 × 0.5) ═ 44.36. Fig. 6, 7, and 8 show the results of test No. 6, and the sound field comprehensive evaluation method is the same as that of test No. 1.

The other test groups in the orthogonal experiment were analyzed in the same manner as in step 45.

By range analysis, the combination of the optimal level and the optimal level of the factors is determined, and the mean value main effect graph shown in fig. 9 is obtained.

The optimal combination parameter of orthogonal experimental analysis is A₂B₃C₃D₂Namely, the excitation frequency of the transduction array is 5MHz, the number of the array elements is 32, the width of the array elements is 0.8mm, and the gap of the array elements is 0.2 mm. Fig. 9 can visually see the effect change trend of each factor level, and can visually judge the influence of the factor level on the test result.

And (5) carrying out a verification test to confirm that the simulation detection method is accurate and reasonable.

And collecting and sorting data to form a database, so that the phased array transducer detection parameters can be conveniently and quickly selected.

The method for rapidly selecting the detection parameters of the phased array transducer solves the problems of high detection parameter selection cost, low efficiency and low digitization degree of the phased array ultrasonic transducer, and utilizes simulation software to carry out scientific and accurate three-dimensional modeling on a transducer detection sound field, so that the selection scheme of the phased array transducer detection parameters is simple and easy to implement, convenient and rapid, accurate in result and small in error.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.