CN106596736A - Real-time ultrasonic phased array total focusing imaging method - Google Patents
Real-time ultrasonic phased array total focusing imaging method Download PDFInfo
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- CN106596736A CN106596736A CN201611152915.XA CN201611152915A CN106596736A CN 106596736 A CN106596736 A CN 106596736A CN 201611152915 A CN201611152915 A CN 201611152915A CN 106596736 A CN106596736 A CN 106596736A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating 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
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
Abstract
The invention discloses a real-time ultrasonic phased array total focusing imaging method. The imaging method comprises the following steps: acquiring ultrasonic data of a target area in a full matrix capture manner by using an ultrasonic phased array probe; gridding an area range to be detected, acquiring a sonic path distance of sound waves emitted by every array element, returning to every array element, from the first point in the top left corner of grids and corresponding position information, and acquiring an index matrix; and establishing a GPU kernel function copy, and realizing real-time total focusing imaging according to the index matrix. The method realizes real-time highly precise ultrasonic imaging and improves the resolution of images.
Description
Technical field
The present invention relates to ultrasonic phased array imaging field, more particularly to a kind of real-time ultrasound phased array total focus imaging side
Method.
Background technology
Ultrasonic phase array detection technique is the conventional Dynamic Non-Destruction Measurement of current industrial circle, and total focus imaging technique
(Total Focus Method) is a kind of new imaging for proposing in recent years.Total focus imaging technique is based on complete matrix number
According to (Full Matrix Capture) is caught, on the basis of complete matrix catches all channel informations of acquisition, it is possible to achieve target
In region focal imaging a little.Conventional ultrasound phased-array technique depends on the firing time for changing ultrasonic phase array array element,
To realize the operation such as focusing, deflection of acoustic beam, single point focus can only be realized；Realize that high accuracy time delay (nanosecond) control needs multiple
Miscellaneous circuit, price is high.And total focus imaging only needs a gathered data to gather to all impact points in region to be measured
Jiao's imaging, and complicated delay circuit is not needed, hardware cost is low.In situation about being popped one's head in using identical ultrasonic phase array
Under, the resolution ratio of total focus imaging is better than conventional ultrasound phased array imaging technology.
At present, the shortcoming of total focus imaging technique is that its data volume is big, computationally intensive.Visited with a 16 array element phased arrays
As a example by head, in the case where each A sweeps sampling depth for 3000, the data file of a complete matrix seizure just has 1MB；Carry out
When total focus imaging is calculated, for each focus point will be related to multiplication and extracting operation, computational complexity is higher than tradition
Ultrasonic phase array B sweeps imaging.Therefore the application of total focus imaging technique at present concentrates on phased array post processing imaging, i.e., first gather
Data, then data are carried out with imaging, calculate the time longer, it is impossible to realize on-line measurement, real time imagery.
The content of the invention
The invention provides a kind of real-time ultrasound phased array total focus imaging method, present invention achieves real-time high-precision is super
Acoustic imaging, improves the resolution ratio of image, described below：
A kind of real-time ultrasound phased array total focus imaging method, the imaging method is comprised the following steps：
Popped one's head in using ultrasonic phase array, in the way of complete matrix catches, gather the ultrasound data of target area；
By regional extent gridding to be measured, from the beginning of the point of first, the grid upper left corner, the sound wave that each array element sends is obtained
The sound path and corresponding positional information of each array element are returned to, index matrix is obtained；
GPU copy is set up, and real-time total focus imaging is realized according to index matrix.
Wherein, it is described by regional extent gridding to be measured, from the beginning of the point of first, the grid upper left corner, obtain each array element and send out
The step of sound wave for going out returns to the sound path of each array element and corresponding positional information, acquisition index matrix is specially：
By regional extent gridding to be measured；With phased array probe center as origin, array element direction is x-axis, and depth direction is y
Axle, sets up rectangular coordinate system；
From the beginning of the point of first, the grid upper left corner, calculate the sound wave that first array element sends and reach this and put and return to first
The sound path of array element；By that analogy, sound path and corresponding positional information that the sound wave that each array element sends returns to each array element are obtained；
All of point in traversal grid, and index matrix is preserved.
Wherein, it is described to set up GPU copy, and realize that the step of real-time total focus are imaged has according to index matrix
Body is：
Index matrix and complete matrix are caught into digital independent in host computer and incoming GPU video memorys；Set up GPU pair
This, each point in each thread correspondence grid；
The sound wave sent according to index matrix m-th array element of acquisition is reflected back the sound of n-th array element at focus position
Intensity values, by that analogy, by the superposition of all sound intensitys after N-m array element of traversal；N is element number of array；
Complete institute's calculating a little in grid, you can according to the intensity level of each point drafting gray-scale map.
The beneficial effect of technical scheme that the present invention is provided is：
1st, for same test specimen in region identical to be measured, using identical ultrasonic phase array pop one's head in the case of, use
The detection image of total focus imaging method is Fig. 4, the use of the detection image of conventional ultrasound phased array method is Fig. 5.It is super with tradition
Sound phased array imaging technology is compared, and method of the present invention imaging precision is higher, and resolution ratio is more preferable.
2nd, the wave beam of conventional ultrasound phased-array technique is focused on, deflection needs high accuracy delay line, with high costs.The present invention
Method only need to each array element of sequentially excitation ultrasound phased array, and receive ultrasound echo signal, prolong without the need for complicated
When circuit.
3rd, compared with existing total focus imaging technique, the method in the present invention can realize real-time total focus imaging.
Under identical gathered data and identical hardware condition, using existing total focus imaging technique, drawing piece image needs 4s,
And only need to 0.06s using the method in the present invention.
Description of the drawings
Fig. 1 is a kind of flow chart of real-time ultrasound phased array total focus imaging method；
Fig. 2 is the schematic diagram of the data acquisition that complete matrix catches；
Fig. 3 is the schematic diagram of total focus imaging method principle；
Fig. 4 is the schematic diagram of test specimen in the embodiment of the present invention；
Fig. 5 is the schematic diagram of the detection image of total focus imaging method；
Fig. 6 is the schematic diagram of the detection image of conventional ultrasound phased array method.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below further is made to embodiment of the present invention
Ground is described in detail.
Embodiment 1
A kind of real-time ultrasound phased array total focus imaging method, referring to Fig. 1, the imaging method is comprised the following steps：
101：Popped one's head in using ultrasonic phase array, in the way of complete matrix catches, gather the ultrasound data of target area；
102：By regional extent gridding to be measured, from the beginning of the point of first, the grid upper left corner, obtain what each array element sent
Sound wave returns to the sound path of each array element and corresponding positional information, obtains index matrix；
103：GPU copy is set up, and real-time total focus imaging is realized according to index matrix.
Wherein, the step of acquisition index matrix in above-mentioned steps 102 is specially：
By regional extent gridding to be measured；With phased array probe center as origin, array element direction is x-axis, and depth direction is y
Axle, sets up rectangular coordinate system；
From the beginning of the point of first, the grid upper left corner, calculate the sound wave that first array element sends and reach this and put and return to first
The sound path of array element；By that analogy, sound path and corresponding positional information that the sound wave that each array element sends returns to each array element are obtained；
All of point in traversal grid, and index matrix is preserved.
Wherein, GPU copy is set up in above-mentioned steps 103, and real-time total focus is realized according to index matrix
The step of imaging, is specially：
Index matrix and complete matrix are caught into digital independent in host computer and incoming GPU video memorys；Set up GPU pair
This, each point in each thread correspondence grid；
The sound wave sent according to index matrix m-th array element of acquisition is reflected back the sound of n-th array element at focus position
Intensity values, by that analogy, by the superposition of all sound intensitys after N-m array element of traversal；N is element number of array；
Complete institute's calculating a little in grid, you can according to the intensity level of each point drafting gray-scale map.
In sum, total focus imaging results are obtained by above-mentioned steps 101- step 103 and only needs to sequentially excitation ultrasound
Each array element of phased array, and ultrasound echo signal is received, without the need for complicated delay circuit.With conventional ultrasound phased array into
As technology is compared, this method imaging precision is higher, and resolution ratio more preferably, meets the various needs in practical application.
Embodiment 2
The scheme in embodiment 1 is further introduced with reference to specific accompanying drawing, computing formula, it is as detailed below
Description：
201：Popped one's head in using ultrasonic phase array, in the way of complete matrix catches, gather target area ultrasound data, and transmitted
To host computer；
Referring to Fig. 2, the data acquisition that complete matrix catches is as follows：
1st, first array element is excited, then all array elements receive ultrasonic echo；
2nd, second array element is excited, then all array elements receive ultrasonic echo；
3rd, by that analogy, all array elements complete to excite --- after reception, by taking 16 array element ultrasonic phase arrays probe as an example, and can be with
Obtain the data matrix of 16 × 16.
Wherein, the embodiment of the present invention is not limited for the probe model of ultrasonic phase array, it is only necessary to understand phased array spy
Centre frequency, array element centre-to-centre spacing, the array element width of head, and the information such as array element quantity.For material for test to be measured, need to be
Isotropic homogeneous medium.
202：Before imaging, for target area scope to be measured, index matrix is set up；
Wherein, the step is specially：
1st, by regional extent gridding to be measured, for example：Area grid to be measured is turned to into 200 × 200 grid.
2nd, with phased array probe center as origin, array element direction is x-axis, and depth direction is y-axis, sets up rectangular coordinate system.
3rd, as shown in figure 3, from the beginning of the point of first, the grid upper left corner, the sound wave that first array element of calculating sends reaches the point
And return to first array element sound path (distance of TX to P points add RX to P point distances, herein TX and RX be first array element,
P is first point of the grid upper left corner).Sound path is calculated by below equation, and focusing point coordinates is (xp,zp)。
According to the velocity of sound in testing medium and ultrasound data sample rate, obtain what the echo-signal was received in first array element
Positional information in ultrasonic signal, the positional information is stored in index matrix.Positional information is calculated by below equation：D is sound
Journey, Fs is ultrasonic signal sampling rate.
Delay=D × Fs
The sound wave that first array element sends is calculated again reaches the sound path put and return to second array element, and by positional information
In being stored in index matrix.By that analogy, obtain the sound wave that each array element sends and return to the sound path of each array element and corresponding position
Information.
4th, by that analogy, all of point in grid is traveled through, and index matrix is preserved.
Wherein, in the case where testing medium and imaging region grid number are constant, it is only necessary to calculate an index matrix.
203：Real-time total focus imaging is realized using GPU and index matrix.
The step is specially：
1st, formatted scope according to regional network to be measured, data space is created in host computer, by taking 200 × 200 grid as an example,
Set up 200 × 200 array；
2nd, index matrix and complete matrix are caught into digital independent in host computer and incoming GPU video memorys；
3rd, GPU copy is set up, each point in each thread correspondence grid；
4th, for the sound wave of m-th array element transmitting, the sound intensity number of n-th array element is transmitted back at focus point (i, j) position
It is according to the computing formula in index matrix：
D=(i-1) × 51200+ (j-1) × 256+ (m-1) × 16+n
The sound intensity value can be obtained according to index matrix, by that analogy, traveled through and be superimposed all sound intensitys after all array elements, i.e.,
The sound intensity value of the point can be obtained.
5th, for same focus point, m-th array element transmitting, the sound path and m-th array element of the signal of n-th array element reception
Receive, the sound path of n-th array element transmission signal is equal, therefore during m-th array element transmitting, it is only necessary to travel through N-m array element
Can complete, for the focusing of the point, amount of calculation can be reduced into half using the method.(N is element number of array)
6th, institute's calculating a little in grid is completed, you can according to the intensity level of each point drafting gray-scale map.
Wherein, selected GPU needs to support that CUDA (Compute Unified Device Architecture) is general
Parallel computation framework, for concrete GPU models are not required.
204：Pop one's head in selecting, and in the case that area grid number to be measured is constant, only need to individually calculate a secondary index square
Battle array, in detection process, it is only necessary to will complete matrix catch repeat in the incoming host computer of data above step be capable of achieving in real time into
Picture, embodiment test block region to be measured is as shown in figure 4, imaging results are as shown in Figure 5.
In sum, total focus imaging results are obtained by above-mentioned steps 201- step 204 and only needs to sequentially excitation ultrasound
Each array element of phased array, and ultrasound echo signal is received, without the need for complicated delay circuit.With conventional ultrasound phased array into
As technology is compared, this method imaging precision is higher, and resolution ratio more preferably, meets the various needs in practical application.
Embodiment 3
Feasibility checking is carried out to the scheme in embodiment 1 and 2 with reference to Fig. 4 and Fig. 5, it is described below：
Device parameters used in the embodiment of the present invention are：Centre frequency is visited for the 16 array element ultrasonic phase arrays of 3.5MHz
Head, array element centre-to-centre spacing is 1.6mm, and AD sample frequencys are 100MHz, and sampled point depth is 3284 points.Gridding regional extent is
48mm length, 45mm depths, discrete is 200 × 200 grid.Host computer CPU be Intel core i5 2410M, 4GB internal memories,
NVDIA GT540M video cards, are furnished with 1GB video memorys, and operating system is the 64bit of Windows 7.Test block to be measured is as shown in figure 4, test block
Material is aluminium, and thickness is 30mm, and three holes are drilled with test specimen, and aperture is 1mm, and upper left corner pitch-row test specimen upper surface distance is
10mm, each pitch-row from its upper left square hole it is horizontal and vertical with a distance from be 10mm.Fig. 5 is total focus imaging results, and Fig. 6 is biography
System ultrasonic phase array B sweeps imaging results.Compared with traditional phased array B sweeps imaging, the resolution ratio of total focus imaging is higher, signal to noise ratio
More preferably, it is more preferable to the Detection results in regional artificial hole to be measured.Using embodiment of the present invention methods described, a frame ultrasound phase-control is realized
The processing speed of battle array total focus imaging is 0.06s, can reach the needs of real time imagery, and uses the side of traditional total focus imaging
Method processes a two field picture, then at least need 5s, it is impossible to realize real time imagery.
To the model of each device in addition to specified otherwise is done, the model of other devices is not limited the embodiment of the present invention,
As long as the device of above-mentioned functions can be completed.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the embodiments of the present invention
Sequence number is for illustration only, does not represent the quality of embodiment.
The foregoing is only presently preferred embodiments of the present invention, not to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (3)
1. a kind of real-time ultrasound phased array total focus imaging method, it is characterised in that the imaging method is comprised the following steps：
Popped one's head in using ultrasonic phase array, in the way of complete matrix catches, gather the ultrasound data of target area；
By regional extent gridding to be measured, from the beginning of the point of first, the grid upper left corner, obtain the sound wave that each array element sends and return to
The sound path of each array element and corresponding positional information, obtain index matrix；
GPU copy is set up, and real-time total focus imaging is realized according to index matrix.
2. a kind of real-time ultrasound phased array total focus imaging method according to claim 1, it is characterised in that described to treat
Regional extent gridding is surveyed, from the beginning of the point of first, the grid upper left corner, the sound wave that each array element sends is obtained and is returned to each array element
Sound path and corresponding positional information, obtain index matrix the step of be specially：
By regional extent gridding to be measured；With phased array probe center as origin, array element direction is x-axis, and depth direction is y-axis,
Set up rectangular coordinate system；
From the beginning of the point of first, the grid upper left corner, the sound wave that first array element of calculating sends reaches this and puts and return to first array element
Sound path；By that analogy, sound path and corresponding positional information that the sound wave that each array element sends returns to each array element are obtained；
All of point in traversal grid, and index matrix is preserved.
3. a kind of real-time ultrasound phased array total focus imaging method according to claim 1, it is characterised in that the foundation
GPU copy, and realize that the step of real-time total focus are imaged is specially according to index matrix：
Index matrix and complete matrix are caught into digital independent in host computer and incoming GPU video memorys；GPU copy is set up,
Each point in each thread correspondence grid；
The sound wave sent according to index matrix m-th array element of acquisition is reflected back the sound intensity value of n-th array element at focus position,
By that analogy, travel through the superposition of all sound intensitys after N-m array element；N is element number of array；
Complete institute's calculating a little in grid, you can according to the intensity level of each point drafting gray-scale map.
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| CN107219305A (en) * | 2017-06-02 | 2017-09-29 | 北京航空航天大学 | A kind of total focus imaging detection method based on annular array transducer |
| CN107328856A (en) * | 2017-05-22 | 2017-11-07 | 日探科技（苏州）有限公司 | Resistance Welding point tester and detection method based on total focus synthetic aperture technique |
| CN108693253A (en) * | 2018-05-02 | 2018-10-23 | 南昌航空大学 | A kind of rapid phase-control battle array ultrasound total focus imaging technique |
| CN109212032A (en) * | 2018-10-25 | 2019-01-15 | 福州大学 | Based on the interface type defect inspection method for improving multiple reflections total focus imaging algorithm |
| CN111487321A (en) * | 2020-04-14 | 2020-08-04 | 广州多浦乐电子科技股份有限公司 | Full-focusing imaging method for improving focusing energy based on ultrasonic reflection |
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| CN112067698A (en) * | 2020-09-14 | 2020-12-11 | 南昌航空大学 | Time-frequency combined rapid full-focusing ultrasonic imaging method |
| CN113176346A (en) * | 2021-04-27 | 2021-07-27 | 汕头市超声检测科技有限公司 | Curve-based full-focus ultrasound real-time imaging method |
| CN113655485A (en) * | 2021-08-24 | 2021-11-16 | 齐鲁中科电工先进电磁驱动技术研究院 | Method, device and equipment for imaging electrode end face and storage medium |
| CN113960653A (en) * | 2021-09-17 | 2022-01-21 | 山东大学 | Phased array sound wave advanced detection instrument and advanced geological prediction method |
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| CN107328856A (en) * | 2017-05-22 | 2017-11-07 | 日探科技（苏州）有限公司 | Resistance Welding point tester and detection method based on total focus synthetic aperture technique |
| CN107219305A (en) * | 2017-06-02 | 2017-09-29 | 北京航空航天大学 | A kind of total focus imaging detection method based on annular array transducer |
| CN108693253A (en) * | 2018-05-02 | 2018-10-23 | 南昌航空大学 | A kind of rapid phase-control battle array ultrasound total focus imaging technique |
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| CN112067698A (en) * | 2020-09-14 | 2020-12-11 | 南昌航空大学 | Time-frequency combined rapid full-focusing ultrasonic imaging method |
| CN112067698B (en) * | 2020-09-14 | 2023-08-04 | 南昌航空大学 | Time-frequency combined rapid full-focusing ultrasonic imaging method |
| CN113176346B (en) * | 2021-04-27 | 2022-09-23 | 汕头市超声检测科技有限公司 | Curve-based full-focus ultrasound real-time imaging method |
| CN113176346A (en) * | 2021-04-27 | 2021-07-27 | 汕头市超声检测科技有限公司 | Curve-based full-focus ultrasound real-time imaging method |
| CN113655485A (en) * | 2021-08-24 | 2021-11-16 | 齐鲁中科电工先进电磁驱动技术研究院 | Method, device and equipment for imaging electrode end face and storage medium |
| CN113960653A (en) * | 2021-09-17 | 2022-01-21 | 山东大学 | Phased array sound wave advanced detection instrument and advanced geological prediction method |
| CN113960653B (en) * | 2021-09-17 | 2024-01-02 | 山东大学 | Phased array sound wave advanced detection instrument and advanced geological prediction method |
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