CN104330146B - A kind of hydrophone localization method based on medical supersonic measurement - Google Patents
A kind of hydrophone localization method based on medical supersonic measurement Download PDFInfo
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- CN104330146B CN104330146B CN201410563247.4A CN201410563247A CN104330146B CN 104330146 B CN104330146 B CN 104330146B CN 201410563247 A CN201410563247 A CN 201410563247A CN 104330146 B CN104330146 B CN 104330146B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005259 measurement Methods 0.000 title claims abstract description 19
- 230000004807 localization Effects 0.000 title claims abstract description 13
- 238000009434 installation Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000012360 testing method Methods 0.000 description 23
- 239000007788 liquid Substances 0.000 description 10
- 238000001514 detection method Methods 0.000 description 8
- 238000002604 ultrasonography Methods 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 3
- 230000004071 biological effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
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Abstract
The invention discloses a kind of hydrophone localization method based on medical supersonic measurement, including hydrophone installation steps, locating rod free end point to the center of circle step of curved support arm, first positioning step in the first step, once focus, take pictures and range determination step：Locating rod is rotated, makes camera coaxial with hydrophone；Camera by the sensitive area auto-focusing on hydrophone top, take pictures, the picture for then being clapped this sends PLC to；Then, the image processing software of scale is built-in with PLC, by the sensitive area that can calculate hydrophone top automatically and locating rod free end distance value between the two, secondary positioning step, secondary focusing is additionally provided with, takes pictures and distance compares step and three times positioning step.After the above method, the accurate positioning of energy hydrophone, quick, reliability is high, low to operating technology personnel requirement, labor intensity is low low with cost.
Description
Technical field
It is particularly a kind of to be measured based on medical supersonic the present invention relates to detection method ultrasonic in a kind of medical supersonic equipment
Hydrophone localization method.
Background technology
Hydrophone is also known as underwater microphone, is the transducer for underwater signal being converted to electric signal.It is to utilize material
Characteristic and it with surrounding environment a variety of mudulation effects caused by interaction, detect the signal such as pressure, sound in liquid
Instrument.In civil area, hydrophone can carry out oil exploration by detecting underwater sound signal, marine organisms are monitored, seabed is investigated
Deng.In military field, front end of the hydrophone as sonar system, the effect of detection unfriendly target signal carry.
It is well known that medical ultrasound is application of the ultrasonics in medical treatment.Ultrasound image clearly and biological effect into
The main body of conflict, should ensure safety, reach image clearly and biological effect again into the main body of conflict.In order to
Ensure safety and use ultrasonic device, the problem of medical supersonic equipment uses the secure threshold of ultrasound is proposed in industry.Therefore,
The sound parameter of medical supersonic equipment must be evaluated, it is ensured that the security in clinical practice.
With the popularization and application of ultrasonic technique, ultrasonic power e measurement technology also seems more important.Ultrasonic power is not
Theoretical calculation can be only relied on to obtain, and must application project method accurately determined.So preferably ultrasonic wave can be set
It is standby to carry out quality control, while help to be fully understood by the sound-filed simulation of ultrasonic wave using personnel.With the technology for focusing on ultrasonic wave
Development, HIFU is increasing for clinical treatment acoustical power, though traditional clamp of sensor takes avoidance measure, still not
The requirement of measurement can be met.
With a large amount of uses of HIFU technologies, the measurement water tank of most of medical supersonic equipment will use sound absorption measure,
Therefore it is required to detect the ultrasound of water tank using hydrophone.Before ultrasonic measurement, the installation accuracy to hydrophone is required to（
That is the sensitive area precision of hydrophone）Positioned, such as first pass through hydrophone fixture and hydrophone is fixed on measurement water tank, then
In one measuring microscope of water tank restocking.Then, while two people cooperation is needed just to work, if desired for a people in microscope
The data or image that viewing microscope is shown, another people then climbs to be adjusted on water tank to the position of hydrophone, makes hydrophone
Installation accuracy meet as defined in require.
No. 201010033966.7 Chinese invention patent disclosed in August in 2010 25 days, its is entitled " a kind of
Hydrophone testing device ", it includes：Basis, vibration isolation table, the shake table being installed in vibration isolation table, for producing vibration signal, peace
Loaded on the liquid column cylinder above shake table.As the container of test, the closure being installed in liquid column cylinder, for being carried out to liquid column cylinder
Sealing；Vavuum pump, for making to produce vacuum state inside liquid column cylinder；High-pressure pump, for making to produce high pressure conditions inside liquid column cylinder；
On the basis of being installed on, and with liquid column cylinder, vavuum pump, high-pressure pump UNICOM pipeline, for controlling the pressure state inside liquid column cylinder；
The hydrophone fixture of pipe end is installed on, for clamping hydrophone to be measured;The standard hydrophone being installed on hydrophone fixture,
For measuring acoustic pressure；First valve, for controlling UNICOM's state of vavuum pump and pipeline；And second valve, for controlling high-pressure pump
With UNICOM's state of pipeline.Above-mentioned test device, Hi-pot test and background can not be carried out by solving existing hydrophone testing device
The problem of noise testing.
No. 201110121836.3 Chinese invention patent disclosed in 14 days December in 2011, its innovation and creation it is entitled
" directivity test device for hydrophone ", it includes the shake table on the basis of being installed on down, for producing vibration signal；It is installed on and shakes
Liquid column cylinder above dynamic platform, the container as test；Runing rest on the basis of being installed on, for clamping and rotating water to be measured
Listen device；Wherein, the runing rest includes support bar, the outer shroud for being installed on support boom end, the inner ring being installed on inside outer shroud,
It is placed on the belt outside inner ring, the motor on support bar and the rubber band being installed in inner ring.
Above-mentioned test device, shake table and liquid column cylinder can be used, the test of hydrophone directivity is realized by motor.
This is to reduce the testing cost of hydrophone, promote the important technological problems that the research field of hydrophone must solve.Solves water
Listen the problem of volume is big, with high costs, error is larger in the test of device directive property.
Above-mentioned test device, give a kind of mode of hydrophone fixation.But the above-mentioned hydrophone fixed for hydrophone
Fixture（Namely runing rest）, it is near from sound field, interference is also easy to produce, if for detecting ultrasound, test result will be made not accurate enough,
Reliability is not high.In addition, the fixed form of rubber band, fixed not firm enough；Also one it is important the reason for, the sensitive area of hydrophone
Positioning do not refer to.
Because the installation accuracy of hydrophone is most important to measuring, the requirement of the installation accuracy of general hydrophone 1 millimeter with
It is interior, 1 millimeter of the installation accuracy, generally require first installation positioning, three times secondary installing positioning, installation positioning or repeatedly installation
Positioning, find, can just basically reach required requirement.
At present, the installation positioning of existing hydrophone, there is following deficiency：
1. the first installation positioning of hydrophone needs to fully rely on the experience or operative skill of operating technology personnel, to behaviour
It is high to make the requirement of technical staff, poor controllability, first positioning and the too big phenomenon of desired value gap often occurs, so as to cause
Installation positioning number increase, or can't find the phenomenon of desired value.
2. microscope carries out secondary installing positioning or repeatedly installation positioning to hydrophone, while two people are needed to coordinate
It can work.The positioning method, there is also following deficiency：
A. microscope finds the process of hydrophone sensitive area, and operation is very cumbersome, it is necessary to repeatedly constantly adjustment, work
Intensity is big, positioning time length, and operating efficiency is low.
B. microscope can not shoot picture immediately, for hydrophone sensitive area fluctuation range whether in prescribed limit（1
Within millimeter）, also can only visually be judged by operating personnel, accuracy and poor reliability.
C. human cost is high, and the installation positioning precision of hydrophone is not high, causes the accuracy of final ultrasonic tesint low,
The reliability of test result is low, and the value of data is not high.
The content of the invention
In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a kind of based on medical super
The hydrophone localization method of sound measurement, the localization method makes hydrophone accurate positioning, quick, reliability is high, to operating technology people
Member requires that low, labor intensity is low low with cost.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of hydrophone localization method based on medical supersonic measurement, comprises the following steps：
The first step, hydrophone installation；In the hydrophone fixed seat that the bottom insertion of hydrophone can be lifted, make hydrophone top
The sensitive area at end is vertically upward；The hydrophone fixed seat is slidably arranged in the hydrophone fixture with concavity circular arc type support arm
On.
The center of circle of concavity circular arc type support arm in the first step is pointed in second step, locating rod free end；In concavity circular arc type branch
The top of brace sets a locating rod that can be rotated, when locating rod rotate to vertically downward when, one end of locating rod is fixed
It is provided with a camera being connected with PLC, in the free end of locating rod and the first step center of circle of concavity circular arc type support arm
Overlap.
3rd step, just positioning：Hydrophone fixed seat is slided, makes hydrophone fixed seat, hydrophone and locating rod coaxial；So
Afterwards, the height of hydrophone fixed seat rises, when proximity switch detects that the sensitive area on hydrophone top and locating rod freely terminate
When near, hydrophone fixed seat stops rising, and just positioning is completed.
4th step, once focus, take pictures and range determination：Locating rod is rotated, makes camera coaxial with hydrophone；Shooting
Head by the sensitive area auto-focusing on hydrophone top, take pictures, the picture for then being clapped this sends PLC to；Then, in PLC
The image processing software of scale is equipped with, can will automatically calculate the sensitive area on hydrophone top with locating rod free end between the two
Distance value.
5th step, secondary positioning：Distance value data in 4th step is passed to hydrophone fixed seat by PLC, and hydrophone is solid
Reservation continues to rise, and hydrophone fixed seat lifting height is equal with the distance value that PLC is provided.
Also include the 6th step, position three times：The concavity circular arc type support arm being capable of swing；By concavity circular arc type branch
Brace swing, camera according to setpoint frequency to the sensitive area auto-focusing on hydrophone top, take pictures, then the institute is clapped
Each picture and shooting time send PLC to；Then, the image processing software of scale is built-in with PLC, can be calculated automatically
Go out the fluctuation range of the sensitive area on the position of the sensitive area on hydrophone top or size and hydrophone top in each picture；
Meanwhile PLC compared with the fluctuation range set and can judge the fluctuation range calculated.
The fluctuation range set is less than or equal to 1mm.
Between the 5th step and the 6th step, it is additionally provided with secondary focusing, takes pictures and apart from the step of comparing, when secondary
After the completion of positioning, camera by the sensitive area on hydrophone top again auto-focusing, take pictures；Image processing software, it will count again
The sensitive area and the distance value of locating rod free end between the two on hydrophone top are calculated, until the distance value is less than or equal to 1mm.
The angle of the concavity circular arc type support arm swing is ± 60 °.
After the present invention uses the above method, have the advantages that：
1. above-mentioned locating rod free end can point to the center of circle of concavity circular arc type support arm in the first step, so as to locating rod energy
The sensitive area on hydrophone fixture top just position.
2. hydrophone fixture has concavity circular arc type support arm, therefore it can be made former from sound field center, the production of interference is avoided
Raw, so as in ultrasound detection, test result be made more accurate, the reliability of test data is high.
3. the image processing software with scale built in above-mentioned camera, PLC and PLC, energy auto-focusing, take pictures,
So as to simple to operate, being not required to personnel, repeatedly constantly adjustment operates, and labor intensity is small, low to the technical requirements degree of operating personnel, fixed
The position time is short, and operating efficiency is high.
4. the image processing software with scale built in above-mentioned camera, PLC and PLC can also calculate water outlet automatically
Listen the sensitive area on device top and locating rod free end distance value between the two, hydrophone top sensitive area fluctuation range and
It is quick to judge fluctuation range whether in setting range, the drawbacks of personnel are visual is avoided, the test data degree of accuracy is high, reliability
By force.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the hydrophone positioner based on medical supersonic measurement of the present invention；
Fig. 2 be locating rod upset after, locating rod vertically downward when structural representation.
Wherein have：1. base；2. support；3. cross bar；4. locating rod；5. hydrophone fixture；6. the center of circle；7. camera；8.
Proximity switch；9. hydrophone fixed seat；10. hydrophone；11. motor；12. rotating shaft.
Embodiment
The present invention is further detailed explanation with specific better embodiment below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, a kind of hydrophone positioner based on medical supersonic measurement, including base 1 and fixation are set
The support 2 being placed on base 1.
The top of above-mentioned support 2 is provided with the cross bar 3 of 180 ° of upsets of an energy, and the plan vertical of the cross bar 3 is provided with one
Root locating rod 4, the top of locating rod 4 are provided with the proximity switch 8 being connected with PLC.The bottom of cross bar 3 be provided with one with
The camera 7 that PLC is connected and can focused on automatically.
The middle part of support 2 is connected with the hydrophone fixture 5 of a concavity circular arc type support arm by rotating shaft 12.Hydrophone presss from both sides
The bottom of tool 5 slidably connects a hydrophone fixed seat 9.Bottom such as hydrophone fixture 5 is provided with same with hydrophone fixture 5
The arc groove in the center of circle, hydrophone fixed seat 9 is interior to be slided along arc groove.
Above-mentioned hydrophone fixture 5 designs circular arc in a concave shape, therefore it can be made former from sound field center, avoids the generation of interference,
So as in ultrasound detection, test result be made more accurate, the reliability of test data is high.
The height of above-mentioned hydrophone fixed seat 9 can lift, and be additionally provided with what is be connected with PLC in hydrophone fixed seat 9
Displacement transducer, the displacement transducer can be monitored to the adjustable height value of hydrophone fixed seat 9.
Above-mentioned camera 7 is coaxially disposed with locating rod 4, and the center of circle of hydrophone fixture 5 is located on the axis of locating rod 4；It is fixed
The height of position bar 4 is equal to the vertical range of cross bar 3 with the center of circle of hydrophone fixture 5.Therefore cross bar 3 carry out 180 ° upset after,
Locating rod 4 on cross bar 3 will vertically downward, the free end of locating rod 4 and the hydrophone fixture 5 of concavity circular arc type support arm
The center of circle overlap, so as to which, locating rod 4 to the sensitive area on the top of hydrophone fixture 5 can just position.
The PLC is built-in with image recognition and image processing software, and image recognition in image processing software with being provided with
Scale.Therefore the sensitive area and distance value, the hydrophone of the free end of locating rod 4 between the two on the top of hydrophone 10 can be calculated automatically
The fluctuation range of 10 top sensitive areas and quick judgement fluctuation range avoid the visual disadvantage of personnel whether in setting range
End, the test data degree of accuracy is high, highly reliable.
The hydrophone fixture 5 can swing, and swing angle scope be ± 60 °.Therefore hydrophone 10 can be pushed up
The fluctuation range of sensitive area is held to carry out accurate measurement.
At least one motor 11, preferably 3 are provided with the support 2, each motor 11 can be rotated forward and inverted, point
The rotation of rotating shaft 12, the upset of cross bar 3 and the lifting of hydrophone fixed seat 9 Yong Yu not controlled.
The inwall of hydrophone fixed seat 9 is evenly arranged with several elastic clipping strips for being used to fix hydrophone 10, often
For individual elastic clipping strip by spring with being connected inside hydrophone fixed seat 9, elastic clipping strip is flexible plastic material or wooden material
Material.So as to fix hydrophone 10 more firm.
A kind of hydrophone localization method based on medical supersonic measurement, comprises the following steps：
The first step, hydrophone 10 are installed；In the hydrophone fixed seat 9 that the bottom insertion of hydrophone 10 can be lifted, make water
Listen the sensitive area on the top of device 10 vertically upward.Hydrophone fixed seat 9 can carry out automatic lifting, while settable use by motor
The displacement transducer of displacement is lifted in detection hydrophone fixed seat 9.Hydrophone fixed seat 9 is slidably arranged in concavity circular arc type
On the hydrophone fixture 5 of support arm.The concavity circular arc type support arm of hydrophone fixture 5 is set, and makes hydrophone fixture 5 remote
Sound field center, avoid the generation of interference, so as in ultrasound detection, test result can be made more accurate, test data it is reliable
Degree is high.
The center of circle of concavity circular arc type support arm in the first step is pointed in second step, the free end of locating rod 4；In concavity circular arc type branch
The top of brace hydrophone fixture 5 sets a locating rod 4 that can be rotated, when locating rod 4 rotate to vertically downward when, positioning
One end of bar 4 is fixedly installed a camera being connected with PLC 7, concavity circular arc in the free end of locating rod 4 and the first step
The center of circle of type support arm overlaps.
3rd step, just positioning：Hydrophone fixed seat 9 is slided, makes hydrophone fixed seat 9, hydrophone 10 and locating rod 4 same
Axle.Then, the height of hydrophone fixed seat 9 rises, when proximity switch 8 detects the sensitive area and locating rod on the top of hydrophone 10
When 4 free ends are close, hydrophone fixed seat 9 stops rising, and just positioning is completed.Herein, proximity switch 8 can also detect hydrophone
The sensitive area on 10 tops and the distance of the free end of locating rod 4, and the distance value of the detection is supplied to PLC, for secondary positioning
When, the adjustable height of hydrophone fixed seat 9 is as reference.
4th step, once focus, take pictures and range determination：Locating rod 4 is rotated, makes camera 7 and hydrophone 10 coaxial；
Camera 7 by the sensitive area auto-focusing on the top of hydrophone 10, take pictures, the picture for then being clapped this sends PLC to；Then,
The image processing software of scale is built-in with PLC, the sensitive area and locating rod 4 that can calculate the top of hydrophone 10 automatically is free
The distance value of end between the two.
The image processing software with scale built in above-mentioned camera, PLC and PLC, energy auto-focusing, take pictures, from
And it is simple to operate, personnel's repeatedly constantly adjustment operation is not required to, labor intensity is small, low to the technical requirements degree of operating personnel, positioning
Time is short, and operating efficiency is high.
5th step, secondary positioning：Distance value data in 4th step is passed to hydrophone fixed seat 9 by PLC, and hydrophone is solid
Reservation 9 continues to rise, and the lifting height of hydrophone fixed seat 9 is equal with the distance value that PLC is provided also can be with the offer of proximity switch 8
Distance value is equal, is selected according to being actually needed.
6th step, secondary focusing, take pictures and apart from comparison：After the completion of secondary positioning, camera 7 is by the top of hydrophone 10
Sensitive area again auto-focusing, take pictures；Image processing software, the sensitive area and locating rod on the top of hydrophone 10 will be calculated again
The distance value of 4 free ends between the two.When the requirement for the 1mm that the distance value of detection is more than setting, according to the difference with setting value
Value, by the way that slide displacement has carried out pin on concavity circular arc type support arm to the adjustable height of hydrophone fixed seat 9 or hydrophone 10
Regulation to property, then focus, take pictures and apart from comparison again, until the distance value meets sets requirement.Using the application's
After method, secondary focusing is normally only needed, takes pictures and apart from comparison, sets requirement can be met, such as less than equal to 1mm.But
Special circumstances, such as sets requirement are strict, such as require to be less than or equal to 0.5mm, then need 3-4 times focusing, take pictures and distance than
It is right.
7th step, is positioned three times：Concavity circular arc type support arm can swing, the angle of swing is ± 60 °, is swung
When, swing speed will it is slow some can shoot more clear photograph so as to camera, so that PLC is identified and determines.Will
Concavity circular arc type support arm swing, camera 7 is according to sensitive area auto-focusing of the setpoint frequency to the top of hydrophone 10, bat
According to each picture and shooting time for then being clapped this send PLC to；Then, the image procossing that scale is built-in with PLC is soft
Part, it can will automatically calculate the quick of the position of the sensitive area on hydrophone top or size in each picture and hydrophone top
The fluctuation range in sense face；Meanwhile PLC compared with the fluctuation range set and can judge the fluctuation range calculated.Its
The middle fluctuation range set is less than or equal to 1mm.
Claims (5)
- A kind of 1. hydrophone localization method based on medical supersonic measurement, it is characterised in that：Comprise the following steps：The first step, hydrophone installation：In the hydrophone fixed seat that the bottom insertion of hydrophone can be lifted, make hydrophone top Sensitive area is vertically upward；The hydrophone fixed seat is slidably arranged on the hydrophone fixture with concavity circular arc type support arm；The center of circle of concavity circular arc type support arm in the first step is pointed in second step, locating rod free end：In concavity circular arc type support arm Top set a locating rod that can be rotated, when locating rod rotate to vertically downward when, locating rod one end fixed setting There is a camera being connected with PLC, the free end of locating rod overlaps with the center of circle of concavity circular arc type support arm in the first step；3rd step, just positioning：Hydrophone fixed seat is slided, makes hydrophone fixed seat, hydrophone and locating rod coaxial；Then, water The height of device fixed seat is listened to rise, when proximity switch detects that the sensitive area on hydrophone top is close with locating rod free end, Hydrophone fixed seat stops rising, and just positioning is completed；4th step, once focus, take pictures and range determination：Locating rod is rotated 180 °, makes camera coaxial with hydrophone, and take the photograph As head is located in locating rod close to one end of hydrophone；Camera by the sensitive area auto-focusing on hydrophone top, take pictures, then Send the picture clapped to PLC；Then, the image processing software of scale is built-in with PLC, calculates hydrophone top automatically Sensitive area and the distance value of locating rod free end between the two；5th step, secondary positioning：Distance value data in 4th step is passed to hydrophone fixed seat, hydrophone fixed seat by PLC Continue to rise, hydrophone fixed seat lifting height is equal with the distance value that PLC is provided.
- 2. the hydrophone localization method according to claim 1 based on medical supersonic measurement, it is characterised in that：Also include the Six steps, are positioned three times：The concavity circular arc type support arm being capable of swing；By concavity circular arc type support arm swing, take the photograph As head according to setpoint frequency to the sensitive area auto-focusing on hydrophone top, take pictures, each picture for then being clapped this and bat Taking the photograph the time sends PLC to；Then, the image processing software of scale is built-in with PLC, calculates hydrophone in each picture automatically The fluctuation range of the sensitive area position on the position of the sensitive area on top or size and hydrophone top；Meanwhile PLC can be by institute The fluctuation range of calculating is compared with the fluctuation range set and judges.
- 3. the hydrophone localization method according to claim 2 based on medical supersonic measurement, it is characterised in that：The setting Fluctuation range be less than or equal to 1mm.
- 4. the hydrophone localization method according to claim 3 based on medical supersonic measurement, it is characterised in that：Described Between five steps and the 6th step, secondary focusing is additionally provided with, take pictures and apart from the step of comparing, after the completion of secondary positioning, shooting Head by the sensitive area on hydrophone top again auto-focusing, take pictures；Image processing software, the quick of hydrophone top will be calculated again Sense face and the distance value of locating rod free end between the two, until the distance value is less than or equal to 1mm.
- 5. the hydrophone localization method according to claim 2 based on medical supersonic measurement, it is characterised in that：The concavity The angle of circular arc type support arm swing is ± 60 °.
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| CN201312813Y (en) * | 2008-11-27 | 2009-09-23 | 江苏省医疗器械检验所 | Energy transducer clamping apparatus for medical ultrasonic detection system |
| CN101813513A (en) * | 2010-01-07 | 2010-08-25 | 中国科学院半导体研究所 | Hydrophone testing device |
| CN202033102U (en) * | 2010-12-22 | 2011-11-09 | 中国船舶重工集团公司第七一五研究所 | Hydrophone calibration stand for vibration liquid column method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3596344B2 (en) * | 1999-03-30 | 2004-12-02 | 富士写真光機株式会社 | Ultrasonic transducer characteristic test equipment |
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|---|---|---|---|---|
| CN201312813Y (en) * | 2008-11-27 | 2009-09-23 | 江苏省医疗器械检验所 | Energy transducer clamping apparatus for medical ultrasonic detection system |
| CN101813513A (en) * | 2010-01-07 | 2010-08-25 | 中国科学院半导体研究所 | Hydrophone testing device |
| CN202033102U (en) * | 2010-12-22 | 2011-11-09 | 中国船舶重工集团公司第七一五研究所 | Hydrophone calibration stand for vibration liquid column method |
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| Title |
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| SJTU-1型医用超声诊断设备声输出测量系统的研制;寿文德 等;《应用声学》;20041231;第23卷(第2期);1-6 * |
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