CN109520612A - The burnt system and method for the quick survey of the practical sound field of immersion type focused transducer - Google Patents
The burnt system and method for the quick survey of the practical sound field of immersion type focused transducer Download PDFInfo
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- CN109520612A CN109520612A CN201811347448.5A CN201811347448A CN109520612A CN 109520612 A CN109520612 A CN 109520612A CN 201811347448 A CN201811347448 A CN 201811347448A CN 109520612 A CN109520612 A CN 109520612A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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Abstract
The present invention provides a kind of burnt system and methods of the quick survey of practical sound field of immersion type focused transducer, the burnt system of the quick survey of the practical sound field of immersion type focused transducer includes ultrasonic sound field analogue simulation module and measurement path planning module, according to the instantaneous sound pressure value around the current distribution of sound field of immersion type focused transducer and current measurement point, the optimal path for obtaining sound field scanning is calculated using path optimization's algorithm in sound field scanning range, and the quick survey coke of practical sound field ultrasound focus is carried out using the optimal path as the measuring route of planning.Due to the process of focus in the real-time sound field of determination be based on current measurement point around instantaneous sound pressure value gradually plan sound field scanning optimal path be scanned, compared to the number that conventional mesh formula scanning method can be reduced sound pressure measurement point, to effectively save the Free field measurement time, time cost and resources costs are reduced.
Description
Technical field
The present invention relates to ultrasound industry technical field, in particular to a kind of practical sound field of immersion type focused transducer
Quickly survey burnt system and method.
Background technique
Immersion type focused transducer is to make sound using acoustic lens principle or curved surface piezoelectric wafer convergence ultrasonic beam
Can high concentration ultrasonic transducer, using certain thickness water layer as couplant, be commonly used in associated biomolecule medical consultations or
The fields such as industrial flaw detection.Compared to other detection methods, its advantage, which can eliminate the acoustic beam generated when direct contact, to be influenced,
The transmitting and reception for making sound wave tend towards stability, and coupling is stablized, and detection result is reproducible, and are conducive to improve speed of detection.
In the survey coke of the practical sound field of focused transducer, common mensuration includes mechanics effect, calorifics effect, change
Learn effect and optical effect.Hydrophone is a kind of sensor for detecting acoustical signal under water, common to have Kynoar
The sound pressure signal received is changed into voltage signal and realized by (Polyvinylidene Fluoride, PVDF) film or probe
Measurement.The advantage of hydrophone is the instantaneous sound pressure signal that can acquire focused transducer each point in sound field, in conjunction with
The three-dimensional data of spatial point realizes that the threedimensional model of real-time sound field is drawn.It is measured by water logging ultrasonic sound field, difference can be observed
Ultrasonic sound field under water depth, interface curvature, frequency probe simulates applications of ultrasound actual environment, and etection theory error.?
In current hydrophone detection, the mode of stepping type plane grid is generallyd use, by servo motor according to scheduled path Lai real
The sound pressure measurement in certain cubic space is applied, and is modeled by three dimensional stress, auxiliary is intuitive and effectively observes whole sound field.
In industry and medical domain, the sound-filed simulation of each probe is required to individually, across the sound field of some media
It is also required to independent measurement, the big time-consuming of acoustic field demand is more.However in conventional stereo grid type scan method, in real-time sound field
The efficiency of middle determining focus is not high, and in order to which real-time three-dimensional focus area determines focus point, it is superfluous often to acquire a large amount of peak bases
Remainder values cause to take considerable time cost and resources costs.
For the inefficient of focus is determined in real-time sound field in the prior art, cause to take considerable time cost and resource
The problem of cost, those skilled in the art always search for the method solved.
Summary of the invention
The purpose of the present invention is to provide a kind of burnt system of the quick survey of practical sound field of immersion type focused transducer and
Method, to solve using the inefficient of focus is determined in real-time sound field in the prior art, cause to take considerable time cost and
The problem of resources costs.
In order to solve the above technical problems, the present invention provides a kind of quick survey of practical sound field of immersion type focused transducer
Burnt system, the burnt system of the quick survey of the practical sound field of immersion type focused transducer include:
Immersion type focused transducer, for the electrical power of input to be converted into ultrasonic wave, and will be after all conversions
Ultrasonic wave collects output；
PVDF pin type hydrophone, for received sound pressure signal to be converted into voltage signal；
Coordinate positioning connect with the immersion type focused transducer and the PVDF pin type hydrophone, is used for
Real-time monitoring surveys the probe of PVDF pin type hydrophone and the coordinate position of immersion type focused transducer during coke；
Ultrasonic sound field analogue simulation module is connect, for simulating and observing with the immersion type focused transducer
The ideal sound field of immersion type focused transducer under different parameters, and preliminary planning sound field scanning scope；
Measurement path planning module is connect with the immersion type focused transducer, super for being focused according to immersion type
Instantaneous sound pressure value around the current distribution of sound field of sonic transducer and current measurement point makes in the sound field scanning range
With path optimization's algorithm calculate obtain sound field scanning optimal path, and using the optimal path as plan measuring route into
The quick survey of the practical sound field ultrasound focus of row is burnt.
It optionally, further include number in the burnt system of the quick survey of the practical sound field of immersion type focused transducer
According to processing and visualization model, it is connect with the immersion type focused transducer and the ultrasonic sound field analogue simulation module,
The data file that sound field scanner program for that will load saves carries out three-dimensional visualization sound field scan data, to obtain practical sound
?；And compare the ideal sound field that the practical sound field is obtained with ultrasonic sound field analogue simulation modular simulation simulation,
To carry out difference assessment.
Optionally, described in institute in the burnt system of the quick survey of the practical sound field of immersion type focused transducer
It is as follows to state the process for calculating the optimal path of acquisition sound field scanning using path optimization's algorithm in sound field scanning range:
With current measurement point starting point the most, as unit of a step value, in conjunction with the instantaneous sound around current measurement point
The sound pressure level of pressure value, chooses the maximum measurement point of sound pressure level as next measurement point, and so on, obtain the optimal of sound field scanning
Path.
Optionally, in the burnt system of the quick survey of the practical sound field of immersion type focused transducer, the path
Optimization algorithm is hill-climbing algorithm, steepest algorithm, simulated annealing or particle swarm algorithm.
Optionally, in the burnt system of the quick survey of the practical sound field of immersion type focused transducer, the coordinate
Positioning system includes:
Sink, for carrying water, to construct water logging environment；
Sliding rail is set in the sink and covers the water surface of sink；
Two clamping regulating members, are all set on the sliding rail, and can move along the sliding rail, use respectively
In gripping immersion type focused transducer and PVDF pin type hydrophone；
Driving part is connect with described two clamping regulating members, for driving clamping regulating member along the sliding rail
Road movement, to adjust the relative position of the immersion type focused transducer Yu the PVDF pin type hydrophone.
Optionally, in the burnt system of the quick survey of the practical sound field of immersion type focused transducer, the coordinate
There are three rectangular co-ordinate translation shaft freedom degree and two rotary freedoms, the immersion types to focus ultrasonic transduction for positioning system tool
Device keeps coaxial or parallel with a certain translation shaft of the coordinate positioning.
Optionally, in the burnt system of the quick survey of the practical sound field of immersion type focused transducer, perpendicular to
The symmetrical axis direction of the plane of scanning motion, distance is scanned greater than outermost between the body wall and immersion type focused transducer of the sink
Line to the maximum distance between the PVDF pin type hydrophone 30%~100%.
Optionally, in the burnt system of the quick survey of the practical sound field of immersion type focused transducer, the ultrasound
Sound field analogue simulation module utilizes surpassing under multivariate Gaussian sound-field model analysis different water levels depth, interface curvature, frequency probe
The ideal sound field of sound simulation of acoustic field immersion type focused transducer.
Optionally, in the burnt system of the quick survey of the practical sound field of immersion type focused transducer, immersion type is poly-
The acoustic pressure distribution of burnt surface of ultrasonic transducer is formulated as follows:
In formula, k1It is the wave number of ultrasonic wave in a liquid,X ' is the coordinate points in three-dimensional system of coordinate, and coordinate is
(x′1,x′2,0)；q0With acoustic beam waist ω0With probe radius of curvature R0Relevant parameter,I is imaginary number list
Position.
Optionally, described polynary in the burnt system of the quick survey of the practical sound field of immersion type focused transducer
After Gauss acoustic beam is propagated along beam axis in Gauss sound-field model, acoustic pressure is formulated as follows:
In formula, k1It is the wave number of ultrasonic wave in a liquid,X ' is the coordinate points in three-dimensional system of coordinate, and coordinate is
(x′1,x′2,x′3)；I is imaginary unit.
The present invention also provides a kind of burnt methods of the quick survey of practical sound field of immersion type focused transducer, using institute as above
State the burnt system of quick survey of the practical sound field of immersion type focused transducer, the practical sound field of immersion type focused transducer
The burnt method of quick survey include the following steps:
Immersion type focused transducer is adjusted to state coaxial with PVDF pin type hydrophone using coordinate positioning,
And the two water journey is placed in standard testing distance；
Using ultrasonic sound field analogue simulation module simulation and observe the immersion type focused transducer under different parameters
Ideal sound field, and preliminary planning sound field scanning scope；
Using measurement path planning module according to the current distribution of sound field of immersion type focused transducer and PVDF
The instantaneous sound pressure value around current measurement point that pin type hydrophone obtains, is calculated in the sound field scanning range using path optimization
Method calculates the optimal path for obtaining sound field scanning, and the optimal path is carried out practical sound field as the measuring route of planning and is surpassed
The quick survey of area for sound,focal is burnt.
Optionally, in the burnt method of the quick survey of the practical sound field of immersion type focused transducer, further include as
Lower step:
Carrying out three-dimensional using the data file that data processing and visualization model save the sound field scanner program of load can
Depending on changing sound field scan data, to obtain practical sound field；And the practical sound field and the ultrasonic sound field analogue simulation module are imitated
The ideal sound field that true simulation obtains compares, to carry out difference assessment.
In the burnt system and method for quick survey of the practical sound field of immersion type focused transducer provided by the present invention, institute
The burnt system of quick survey for stating the practical sound field of immersion type focused transducer includes ultrasonic sound field analogue simulation module and measurement road
Diameter planning module, according to instantaneous around the current distribution of sound field of immersion type focused transducer and current measurement point
Sound pressure level uses path optimization's algorithm to calculate the optimal path for obtaining sound field scanning in sound field scanning range, and by described in most
Shortest path is burnt as the quick survey that the measuring route of planning carries out practical sound field ultrasound focus.Due to focus in the real-time sound field of determination
Process be based on current measurement point around instantaneous sound pressure value gradually plan sound field scanning optimal path be scanned, compare
It can be reduced the number of sound pressure measurement point in conventional mesh formula scanning method, to effectively save the Free field measurement time, reduce the time
Cost and resources costs.
Detailed description of the invention
Fig. 1 is the quick structure for surveying burnt system of the practical sound field of immersion type focused transducer in one embodiment of the invention
Schematic diagram；
Fig. 2 is path in the burnt system of quick survey of the practical sound field of immersion type focused transducer in one embodiment of the invention
The schematic diagram of optimization algorithm；
Fig. 3 is the quick process for surveying burnt method of the practical sound field of immersion type focused transducer in one embodiment of the invention
Figure.
In Fig. 1: 1- immersion type focused transducer；2-PVDF pin type hydrophone；3- coordinate positioning；30- sink；
31- sliding rail；32- clamps regulating member；4- ultrasonic sound field analogue simulation module；5- measurement path planning module；6- data
Processing and visualization model.
Specific embodiment
Below in conjunction with the drawings and specific embodiments to the practical sound field of immersion type focused transducer proposed by the present invention
Burnt system and method is quickly surveyed to be described in further detail.According to following explanation and claims, advantages of the present invention and spy
Sign will become apparent from.It should be noted that attached drawing is all made of very simplified form and using non-accurate ratio, only to side
Just, the purpose of the embodiment of the present invention is lucidly aided in illustrating.
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.It should be noted that diagram provided in the present embodiment is only with signal
Mode illustrates basic conception of the invention, then in schema only display with related component in the present invention rather than when according to actual implementation
Component count, shape and size draw, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind
Become, and its assembly layout kenel may also be increasingly complex.
The certain terms for indicating particular system components have been used throughout specification and claims.Such as the technology of this field
What personnel will be understood that, different company may indicate a component with different titles.But function different in title is not expected herein
It is distinguished between identical component.In the specification and in the claims, term " includes " and "comprising" press open side
Formula uses, and therefore should be interpreted " including, but are not limited to ... ".
As shown in the application and claims, unless context clearly prompts exceptional situation, " one ", "one", " one
The words such as kind " and/or "the" not refer in particular to odd number, may also comprise plural number.It is, in general, that term " includes " only prompts to wrap with "comprising"
Include clearly identify the step of and element, and these steps and element do not constitute one it is exclusive enumerate, method or apparatus
The step of may also including other or element.
In addition, each embodiment of following description is respectively provided with one or more technical characteristics, so this is not meant to
It must implement all technical characteristics in any embodiment simultaneously using present inventor, or be only capable of being performed separately in different embodiments
One or all technical characteristic.In other words, under the premise of being embodied as possible, those skilled in the art can be according to the present invention
Disclosure, and regard design specification or implementation demand, it is special selectively to implement all or part of technology in any embodiment
Sign, or selectively implement the combination of all or part of technical characteristic in multiple embodiments, increase the present invention whereby and implements
When elasticity.
To be clearer and more comprehensible the purpose of the present invention, feature, a specific embodiment of the invention is made with reference to the accompanying drawing
Further instruction, however, the present invention can be realized with different forms, it is not considered that being only confined to the embodiment described.
<embodiment one>
Referring to FIG. 1, its quick knot for surveying burnt system for the practical sound field of immersion type focused transducer of the invention
Structure schematic diagram.As shown in Figure 1, the burnt system of the quick survey of the practical sound field of immersion type focused transducer includes: immersion type
Focused transducer 1, PVDF pin type hydrophone 2, coordinate positioning 3, ultrasonic sound field analogue simulation module 4 and measuring route
Planning module 5, the immersion type focused transducer 1 are used to for the electrical power of input being converted into ultrasonic wave (immersion type focusing
The principle of ultrasonic transducer 1 is: converging ultrasonic beam using acoustic lens principle or curved surface piezoelectric wafer, sound is enable highly to collect
In, can be applied to medical consultations and industrial flaw detection), and the ultrasonic wave after all conversions is collected into output；The PVDF pin type
Hydrophone 2 is used to for received sound pressure signal being converted into voltage signal, and the sound pressure level of measurement point can be obtained according to sound pressure signal；
The coordinate positioning 3 is connect with the immersion type focused transducer 1 and the PVDF pin type hydrophone 2, for real
When monitoring survey it is burnt during the probe of PVDF pin type hydrophone 2 and the coordinate position of immersion type focused transducer 1；It is described super
Several analogue simulation modules 4 are connect with the immersion type focused transducer 1, for simulating and observing under different parameters
The ideal sound field of immersion type focused transducer 1, and preliminary planning sound field scanning scope；The measurement path planning module 5
It is connect with the immersion type focused transducer 1, for the sound-filed simulation feelings current according to immersion type focused transducer 1
Instantaneous sound pressure value around condition and current measurement point calculates acquisition sound using path optimization's algorithm in the sound field scanning range
The optimal path of field scan, and the quick of practical sound field ultrasound focus is carried out using the optimal path as the measuring route of planning
It surveys burnt (the i.e. described measurement path planning module 5 according to the ultrasound focus position surveyed, with the mould of " focus, region --- close, thin "
Formula plans grid scanning area again, draws practical water logging and tests sound field).
Referring to FIG. 3, its quick survey burnt system Road for the practical sound field of immersion type focused transducer of the invention
The schematic diagram of diameter optimization algorithm.Described calculated in the sound field scanning range using path optimization's algorithm obtains sound field scanning
The process of optimal path is as follows: with current measurement point starting point the most, as unit of a step value, in conjunction with current measurement point week
The sound pressure level for the instantaneous sound pressure value enclosed, chooses the maximum measurement point of sound pressure level as next measurement point, and so on, obtain sound field
The optimal path (optimal path is collectively formed by the measurement point of all selections) of scanning, in other words, according to current measurement point
Surrounding acoustic pressure situation is chosen most strong acoustic pressure position and is promoted, realizes optimal path.The solution of the present invention is different from traditional grid type
Scanning method, the scheme of the invention is gradually planning the optimal path of sound field scanning based on the instantaneous sound pressure value around current measurement point
It is scanned and (plans grid type scanning area again using focal position has been surveyed, compare planning sound field scanning scope into one
Step reduces scanning area), path optimization's algorithm that the present invention uses reaches rapidly sound field peak value using the optimal path of every step,
Effectively evade the influence of region maximum simultaneously, compared to the number that conventional mesh formula scanning method can be reduced sound pressure measurement point, from
And save the Free field measurement time.
In the present embodiment, path optimization's algorithm includes but is not limited to hill-climbing algorithm, steepest algorithm, simulated annealing calculation
Method or particle swarm algorithm.Specifically, by taking hill-climbing algorithm as an example advanced as unit of a step value according to current measurement point,
When the acoustic pressure of new measurement point is greater than the sound pressure level of current measurement point, that is, new measurement point is chosen as next measurement point；Work as measurement
When point surrounding sound pressure level is respectively less than the sound pressure level of current measurement point, illustrate that the acoustic pressure of current measurement point reaches peak value condition.Specifically
Ground, by taking steepest hill-climbing algorithm as an example, be according to current measurement point, as unit of a step value, 26 measurement points around
Maximum point is chosen in sound pressure level and reaches sound field peak value rapidly using the optimal thought of every step as next measurement point, while effectively
Evade the influence of region maximum.
Further, with continued reference to FIG. 1, the burnt system of the quick survey of the practical sound field of immersion type focused transducer is also wrapped
Data processing and visualization model 6 are included, focuses ultrasonic transduction with the immersion type, 1 and the ultrasonic sound field analogue simulation module 4
Connection, the data file that the sound field scanner program for that will load saves carry out three-dimensional visualization sound field scan data, to obtain
Practical sound field；And the ideal sound field for obtaining the practical sound field and 4 analogue simulation of ultrasonic sound field analogue simulation module into
Row comparison, to carry out difference assessment.
As shown in Figure 1, the coordinate positioning 3 includes: 31, two sink 30, sliding rail clamping regulating members 32
And driving part (not drawn in figure), the sink 30 is for carrying water, to construct water logging environment；The sliding rail 31 is set to
In the sink 30 and cover the water surface of sink 30；Described two clamping regulating members 32 are all set in the sliding rail 31
On, and can be moved along the sliding rail 31, it is respectively used to grip immersion type focused transducer 1 and PVDF pin type water
Listen device 2；The driving part is connect with described two clamping regulating members 32, for driving clamping regulating member 32 along the cunning
Dynamic rail road 31 moves, to adjust the relative position of the immersion type focused transducer 1 and the PVDF pin type hydrophone 2.
Specifically, there are three rectangular co-ordinate translation shaft freedom degree and two rotations are free for the tool of coordinate positioning 3
Degree, the immersion type focused transducer 1 keep coaxial or parallel with a certain translation shaft of the coordinate positioning 3.It is hanging down
Directly distance is greater than most between the symmetrical axis direction of the plane of scanning motion, the body wall and immersion type focused transducer 1 of the sink 30
Lateral scanlines to the maximum distance between the PVDF pin type hydrophone 2 30%~100%.
In the present embodiment, the ultrasonic sound field analogue simulation module 4 analyzes different water levels using multivariate Gaussian sound-field model
The ideal sound field of ultrasonic sound field simulation immersion type focused transducer under depth, interface curvature, frequency probe.
Specifically, being based on multivariate Gaussian sound-field model, formula is used in the acoustic pressure distribution on immersion type focused transducer surface
It is expressed as follows:
In formula, k1It is the wave number of ultrasonic wave in a liquid,X ' is the coordinate points in three-dimensional system of coordinate, and coordinate is
(x′1,x′2,0)；q0With acoustic beam waist ω0With probe radius of curvature R0Relevant parameter,I is imaginary number list
Position.
After Gauss acoustic beam is propagated along beam axis in the multivariate Gaussian sound-field model, acoustic pressure is formulated as follows:
In formula, k1It is the wave number of ultrasonic wave in a liquid,X ' is the coordinate points in three-dimensional system of coordinate, and coordinate is
(x′1,x′2,x′3)；I is imaginary unit.
<embodiment two>
The present embodiment additionally provides a kind of burnt method of quick survey of practical sound field of immersion type focused transducer.Join below
Examine the burnt method of quick survey that the practical sound field of immersion type focused transducer described in the present embodiment is described in detail in Fig. 1 and Fig. 2.
Firstly, executing step S1, immersion type focused transducer 1 is adjusted to and PVDF using coordinate positioning 3
The coaxial state of pin type hydrophone 2, and the two water journey is placed in standard testing distance (focus or near field length)；
Then, step S2 is executed, simulated using ultrasonic sound field analogue simulation module 4 and observes the immersion type under different parameters
The ideal sound field of focused transducer 1, and preliminary planning sound field scanning scope；
Then, step S3 is executed, current according to immersion type focused transducer 1 using measurement path planning module 5
The instantaneous sound pressure value around current measurement point that distribution of sound field and PVDF pin type hydrophone 2 obtain, is scanned in the sound field
The optimal path for obtaining sound field scanning is calculated in range using path optimization's algorithm, and using the optimal path as the survey of planning
Measure the quick survey coke that path carries out practical sound field ultrasound focus.
Then, step S4 is executed, the number for the sound field scanner program of load being saved using data processing and visualization model 6
Three-dimensional visualization sound field scan data is carried out according to file, to obtain practical sound field；And by the practical sound field and the ultrasonic sound
The ideal sound field that analogue simulation module 4 analogue simulation in field obtains compares, to carry out difference assessment.
For the method disclosed in the embodiment, as corresponding with structure disclosed in embodiment, so the comparison of description
Simply, related place illustrates referring to structure division.
To sum up, in the burnt system and method for the quick survey of the practical sound field of immersion type focused transducer provided by the present invention
In, the burnt system of the quick survey of the practical sound field of immersion type focused transducer includes ultrasonic sound field analogue simulation module and survey
Path planning module is measured, around according to the current distribution of sound field of immersion type focused transducer and current measurement point
Instantaneous sound pressure value calculates the optimal path for obtaining sound field scanning in sound field scanning range using path optimization's algorithm, and by institute
It is burnt to state the quick survey that optimal path carries out practical sound field ultrasound focus as the measuring route of planning.Due in the real-time sound field of determination
The process of focus be based on current measurement point around instantaneous sound pressure value gradually plan sound field scanning optimal path be scanned,
Compared to the number that conventional mesh formula scanning method can be reduced sound pressure measurement point, to effectively save the Free field measurement time, reduce
Time cost and resources costs.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (12)
1. a kind of burnt system of the quick survey of practical sound field of immersion type focused transducer characterized by comprising
Immersion type focused transducer, for the electrical power of input to be converted into ultrasonic wave, and by the ultrasound after all conversions
Wave collects output；
PVDF pin type hydrophone, for received sound pressure signal to be converted into voltage signal；
Coordinate positioning is connect with the immersion type focused transducer and the PVDF pin type hydrophone, for real-time
The probe of PVDF pin type hydrophone and the coordinate position of immersion type focused transducer during coke are surveyed in monitoring；
Ultrasonic sound field analogue simulation module is connect, for simulating and observing in difference with the immersion type focused transducer
The ideal sound field of immersion type focused transducer under parameter, and preliminary planning sound field scanning scope；
Measurement path planning module is connect with the immersion type focused transducer, is changed for focusing ultrasound according to immersion type
Instantaneous sound pressure value around energy device current distribution of sound field and current measurement point, uses road in the sound field scanning range
Diameter optimization algorithm calculates the optimal path for obtaining sound field scanning, and the optimal path is real as the progress of the measuring route of planning
The quick survey of border sound field ultrasound focus is burnt.
2. the burnt system of the quick survey of the practical sound field of immersion type focused transducer as described in claim 1, which is characterized in that
It further include data processing and visualization model, with the immersion type focused transducer and the ultrasonic sound field analogue simulation mould
Block connection, the data file that the sound field scanner program for that will load saves carries out three-dimensional visualization sound field scan data, to obtain
Obtain practical sound field；And by the practical sound field and the ultrasonic sound field analogue simulation modular simulation simulation obtain ideal sound field into
Row comparison, to carry out difference assessment.
3. the burnt system of the quick survey of the practical sound field of immersion type focused transducer as described in claim 1, which is characterized in that
The process of the optimal path for calculating acquisition sound field scanning using path optimization's algorithm in the sound field scanning range is as follows:
With current measurement point starting point the most, as unit of a step value, in conjunction with the instantaneous sound pressure value around current measurement point
Sound pressure level, choose the maximum measurement point of sound pressure level as next measurement point, and so on, obtain the optimal road of sound field scanning
Diameter.
4. the burnt system of the quick survey of the practical sound field of immersion type focused transducer as claimed in claim 3, which is characterized in that
Path optimization's algorithm is hill-climbing algorithm, steepest algorithm, simulated annealing or particle swarm algorithm.
5. the burnt system of the quick survey of the practical sound field of immersion type focused transducer as described in claim 1, which is characterized in that
The coordinate positioning includes:
Sink, for carrying water, to construct water logging environment；
Sliding rail is set in the sink and covers the water surface of sink；
Two clamping regulating members, are all set on the sliding rail, and can move along the sliding rail, are respectively used to press from both sides
Hold fixed immersion type focused transducer and PVDF pin type hydrophone；
Driving part is connect with described two clamping regulating members, for driving clamping regulating member to transport along the sliding rail
It is dynamic, to adjust the relative position of the immersion type focused transducer Yu the PVDF pin type hydrophone.
6. the burnt system of the quick survey of the practical sound field of immersion type focused transducer as claimed in claim 5, which is characterized in that
There are three rectangular co-ordinate translation shaft freedom degree and two rotary freedoms, the immersion type focuses the coordinate positioning tool
Ultrasonic transducer keeps coaxial or parallel with a certain translation shaft of the coordinate positioning.
7. the burnt system of the quick survey of the practical sound field of immersion type focused transducer as claimed in claim 5, which is characterized in that
Perpendicular to the symmetrical axis direction of the plane of scanning motion, distance is greater than most between the body wall and immersion type focused transducer of the sink
Lateral scanlines to the maximum distance between the PVDF pin type hydrophone 30%~100%.
8. the burnt system of the quick survey of the practical sound field of immersion type focused transducer as described in claim 1, which is characterized in that
The ultrasonic sound field analogue simulation module utilizes multivariate Gaussian sound-field model analysis different water levels depth, interface curvature, probe frequency
The ideal sound field of ultrasonic sound field simulation immersion type focused transducer under rate.
9. the burnt system of the quick survey of the practical sound field of immersion type focused transducer as claimed in claim 8, which is characterized in that
The acoustic pressure distribution on immersion type focused transducer surface is formulated as follows:
In formula, k1It is the wave number of ultrasonic wave in a liquid,X ' is the coordinate points in three-dimensional system of coordinate, and coordinate is
(x'1,x'2,0)；q0With acoustic beam waist ω0With probe radius of curvature R0Relevant parameter,I is imaginary number list
Position.
10. the burnt system of the quick survey of the practical sound field of immersion type focused transducer as claimed in claim 9, feature exist
In after Gauss acoustic beam is propagated along beam axis in the multivariate Gaussian sound-field model, acoustic pressure is formulated as follows:
In formula, k1It is the wave number of ultrasonic wave in a liquid,X ' is the coordinate points in three-dimensional system of coordinate, and coordinate is (x'1,
x'2,x'3)；I is imaginary unit.
11. a kind of burnt method of the quick survey of practical sound field of immersion type focused transducer, which is characterized in that wanted using such as right
The burnt system of the quick survey of the practical sound field of immersion type focused transducer described in asking any one of 1~8, the immersion type focuses super
The burnt method of the quick survey of the practical sound field of sonic transducer includes the following steps:
Immersion type focused transducer is adjusted to state coaxial with PVDF pin type hydrophone using coordinate positioning, and will
The two water journey is placed in standard testing distance；
The ideal of the immersion type focused transducer under different parameters using ultrasonic sound field analogue simulation module simulation and observation
Sound field, and preliminary planning sound field scanning scope；
Using measurement path planning module according to the current distribution of sound field of immersion type focused transducer and PVDF pin type
The instantaneous sound pressure value around current measurement point that hydrophone obtains, uses path optimization's algorithm meter in the sound field scanning range
The optimal path for obtaining sound field scanning is calculated, and the optimal path is burnt as the practical sound field ultrasound of the measuring route of planning progress
The quick survey of point is burnt.
12. the burnt method of the quick survey of the practical sound field of immersion type focused transducer as claimed in claim 11, feature exist
In further including following steps:
Three-dimensional visualization is carried out using the data file that data processing and visualization model save the sound field scanner program of load
Sound field scan data, to obtain practical sound field；And by the practical sound field and the ultrasonic sound field analogue simulation modular simulation mould
The quasi- ideal sound field obtained compares, to carry out difference assessment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347448.5A CN109520612A (en) | 2018-11-13 | 2018-11-13 | The burnt system and method for the quick survey of the practical sound field of immersion type focused transducer |
Applications Claiming Priority (1)
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