CN205157037U - Focus supersound focus acoustic pressure measuring instrument - Google Patents
Focus supersound focus acoustic pressure measuring instrument Download PDFInfo
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- CN205157037U CN205157037U CN201520923702.7U CN201520923702U CN205157037U CN 205157037 U CN205157037 U CN 205157037U CN 201520923702 U CN201520923702 U CN 201520923702U CN 205157037 U CN205157037 U CN 205157037U
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Abstract
The utility model provides a focus supersound focus acoustic pressure measuring instrument, include: laser instrument, transducer displacement adjusting device, basin, the transducer that awaits measuring, image acquisition device, control processing apparatus, laser beam refine device and angle of deflection amplification device. The utility model discloses the focus supersound focus acoustic pressure that the convenient accurate different transducers of measurement of ability produced, and the measurement process can not cause the interference to the sound field. The laser beam refines the light beam that the device enabled to pass the focus regional and narrows down, is favorable to the precision measurement of focus acoustic pressure. Angle of deflection amplification device can will deflect the angle amplify, when CCD camera out of focus point is near, also enable to deflect apart from the biggest, this overall length that is favorable to shortening measurement system is saved space. The utility model discloses simple structure, the effect is showing, has extensive application prospect in focus supersound focus sound pressure measurement field.
Description
Technical field
The utility model belongs to focus supersonic focus sound pressure measurement field, particularly relates to a kind of focus supersonic focus sound pressure measurement instrument.
Background technology
Focus supersonic focus acoustic pressure is an important indicator of focused ultrasound field, realizes by corresponding measuring equipment its measurement.
The sound pressure measurement of current focus supersonic focus mainly adopts hydrophone, the basic ideas that the method is measured first carry out with nautical receiving set the particular location that 3-D scanning finds acoustic pressure focus, again scanning survey carried out to focusing acoustic field and calculate the geometric parameter of focal regions, the acoustic pressure then under total power is directly measured at focus place.The mode measured based on this method mainly contains two kinds: piezoelectric hydrophone method and fibre optic hydrophone method.Piezoelectric hydrophone method can measure the focus acoustic pressure under low-power comparatively accurately, and focus place produces the nonlinear effect such as temperature rise, shock wave, cavitation and acoustic saturation and easily causes transducer sensitivity to decline at high power, even damages nautical receiving set.Fibre optic hydrophone method measures the main method of high sound pressure at present, but need to place Fibre Optical Sensor in measured place, and this easily makes measured place produce cavitation, cause measurement result and actual acoustic pressure inconsistent, and easily damage fibre optic hydrophone.
The focus sound pressure measurement mode of current most potentiality utilizes laser deflection method to carry out non-intrusion type non intrusive measurement.The principle measuring focus supersonic focus acoustic pressure based on laser deflection method is: when the directional light that a beam diameter is less than sound wave length incides in medium, effect due to sound field causes medium refraction index to be that cyclical variation makes light deflect, thus carry out the side-play amount of compute ray according to the deflected trajectory of light, then the relation setting up light deflection distance and focus acoustic pressure is to calculate focus acoustic pressure.
According to above measuring principle, in conjunction with the geometric relationship of light deflection track (as shown in Figure 1), there is following relation when not considering nonlinear effect:
sinα＝L/r
tanα＝d/S≈sinα
Wherein, α is light deflection angle, and L is effective sound field width, and r is the radius-of-curvature of light deflection, and d is deflection distance, and S is that screen is to focal length.
When light is incident perpendicular to Acoustic Wave Propagation direction, the radius-of-curvature r of light deflection is:
r＝n/▽n
Wherein, n is medium refraction index, and ▽ n is refractive index gradient.
Under isothermy, acoustic pressure gradient ▽ P and medium refraction index gradient ▽ n is proportional:
▽n＝k▽P
Wherein,
The relation of focus acoustic pressure and deflection distance can be obtained by above relational expression:
Utilize the relation of above-mentioned focus acoustic pressure and deflection distance can measure focus supersonic focus acoustic pressure, but because the acoustic pressure gradient at focus place is only bigger than the acoustic pressure gradient near focal point region, so the width of light beam own may cause light deflection remarkable, thus cause the focus acoustic pressure that finally calculates inaccurate; And due to very little through light deflection angle after focus area, when the CCD camera focal point position of light spot received image is far away not, it is inaccurate that the deflection distance of light can not reach the maximum measurement result that also can make.
Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of focus supersonic focus sound pressure measurement instrument, in use can not disturb sound field to realize one, and the focus supersonic focus sound pressure measurement instrument of focus acoustic pressure can be recorded comparatively accurately.
For achieving the above object and other relevant objects, the utility model provides a kind of focus supersonic focus sound pressure measurement instrument, comprise: laser instrument, transducer displacement regulating device, tank, transducer to be measured, image collecting device, control treatment device, and comprise at least one in laser beam device for thinning and deflection angle multiplying arrangement; Described laser instrument is used for Emission Lasers bundle; Described transducer displacement regulating device is used for the position fixing and regulate described transducer to be measured; Described tank is used for holding de aerated water, and described transducer to be measured is placed in de aerated water; Described image collecting device, for receiving the light beam after through focus, gathers deflected beam image; Described control treatment device is connected to described transducer displacement regulating device and image collecting device, for the movement of regulable control transducer to be measured, and calculates for light beam image process and acoustic pressure; After described laser beam device for thinning is positioned over laser instrument, attenuate for the laser beam that laser instrument is launched, make to be less than sound wave by the lasing beam diameter of focus long; Before described deflection angle multiplying arrangement is positioned over image collecting device, for the deflection angle of the laser beam through focus outgoing is amplified, the deflection distance of the laser beam that image collecting device is received is as far as possible large, to make image collecting device when focal point is nearer, light deflection distance can be differentiated and accurately record.
As a kind of preferred version of focus supersonic focus sound pressure measurement instrument of the present utility model, described focus supersonic focus sound pressure measurement instrument is provided with laser beam device for thinning, after being positioned over laser instrument, laser beam for being launched by laser instrument attenuates, and makes to be less than sound wave by the lasing beam diameter of focus long.
As a kind of preferred version of focus supersonic focus sound pressure measurement instrument of the present utility model, described focus supersonic focus sound pressure measurement instrument is provided with deflection angle multiplying arrangement, before being positioned over image collecting device, for the deflection angle of the laser beam through focus outgoing is amplified, the deflection distance of the laser beam that image collecting device is received is as far as possible large, make image collecting device when focal point is nearer, light deflection distance can be differentiated and accurately record.
As a kind of preferred version of focus supersonic focus sound pressure measurement instrument of the present utility model, described focus supersonic focus sound pressure measurement instrument is provided with laser beam device for thinning and deflection angle multiplying arrangement simultaneously, after described laser beam device for thinning is positioned over laser instrument, laser beam for being launched by laser instrument attenuates, and makes to be less than sound wave by the lasing beam diameter of focus long; Before described deflection angle multiplying arrangement is positioned over image collecting device, for the deflection angle of the laser beam through focus outgoing is amplified, the deflection distance of the laser beam that image collecting device is received is as far as possible large, make image collecting device when focal point is nearer, light deflection distance can be differentiated and accurately record.
As a kind of preferred version of focus supersonic focus sound pressure measurement instrument of the present utility model, described laser beam device for thinning comprises the first optics convex lens and the second optics convex lens that arrange in turn along light path, the focus of described first optics convex lens overlaps with the focus of described second optics convex lens, further, the focal length of described first optics convex lens is greater than the focal length of described second optics convex lens.
Further, the diameter before and after described laser beam refinement meets formula D1/D2=f1/f2, and wherein, D1, D2 are respectively the lasing beam diameter before and after refinement, and f1, f2 are respectively the focal length of the first optics convex lens and the second optics convex lens.
As a kind of preferred version of focus supersonic focus sound pressure measurement instrument of the present utility model, described deflection angle multiplying arrangement comprises one or more divergent lens, for dispersing laser beam, the deflection angle of laser beam is increased.
As a kind of preferred version of focus supersonic focus sound pressure measurement instrument of the present utility model, described control treatment device comprises the one in computing machine and intelligent movable equipment.
As a kind of preferred version of focus supersonic focus sound pressure measurement instrument of the present utility model, described image collecting device comprises CCD camera.
As a kind of preferred version of focus supersonic focus sound pressure measurement instrument of the present utility model, described bottom of gullet is provided with acoustic absorption material.
As mentioned above, focus supersonic focus sound pressure measurement instrument of the present utility model, has following beneficial effect: the utility model can facilitate the focus supersonic focus acoustic pressure measured different transducer accurately and produce, and measuring process can not cause interference to sound field.Laser beam device for thinning can make to narrow through the light beam of focus area, is conducive to the accurate measurement of focus acoustic pressure.Deflection angle can amplify by deflection angle multiplying arrangement, when CCD camera focal point is nearer, deflection distance also can be made maximum, and this is conducive to the overall length shortening measuring system, saves space.The utility model structure is simple, and Be very effective, is with a wide range of applications in focus supersonic focus sound pressure measurement field.
Accompanying drawing explanation
Fig. 1 is shown as laser beam deflection track schematic diagram.
Fig. 2 is shown as the system architecture schematic diagram of focus supersonic focus sound pressure measurement instrument of the present utility model.
Fig. 3 is shown as the laser beam device for thinning principle schematic of focus supersonic focus sound pressure measurement instrument of the present utility model.
Fig. 4 is shown as the deflection angle multiplying arrangement principle schematic of focus supersonic focus sound pressure measurement instrument of the present utility model.
Fig. 5 and Fig. 6 is shown as the system architecture schematic diagram of focus supersonic focus sound pressure measurement instrument of the present utility model two kinds of different embodiments respectively.
Element numbers explanation
1 laser instrument
2 laser beam
3 transducer displacement regulating devices
4 transducers to be measured
5 focus supersonic focuses
6 tanks
7 acoustic absorption materials
8 de aerated waters
9 image collecting devices
10 control treatment devices
11 laser beam device for thinning
12 deflection angle multiplying arrangements
Embodiment
Below by way of specific instantiation, embodiment of the present utility model is described, those skilled in the art the content disclosed by this instructions can understand other advantages of the present utility model and effect easily.The utility model can also be implemented or be applied by embodiments different in addition, and the every details in this instructions also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present utility model.
Refer to Fig. 2 ~ Fig. 6.It should be noted that, the diagram provided in the present embodiment only illustrates basic conception of the present utility model in a schematic way, then only the assembly relevant with the utility model is shown in diagram but not component count, shape and size when implementing according to reality is drawn, it is actual when implementing, and the kenel of each assembly, quantity and ratio can be a kind of change arbitrarily, and its assembly layout kenel also may be more complicated.
Embodiment 1
As shown in Figure 2, the present embodiment provides a kind of focus supersonic focus sound pressure measurement instrument, comprising: laser instrument 1, transducer displacement regulating device 3, tank 6, transducer to be measured 4, image collecting device 9, control treatment device 10, laser beam device for thinning 11 and deflection angle multiplying arrangement 12.
Described laser instrument 1 is for Emission Lasers bundle 2, and the initial diameter of described laser beam 2 is D1.
Described transducer displacement regulating device 3, for fixing and regulate the position of described transducer to be measured 4, to adjust the focus 5 of described transducer to be measured 4.Particularly, described transducer displacement regulating device 3 can adjust upper-lower position and the right position of described transducer to be measured 4.
Described tank 6, for holding de aerated water 8, is provided with acoustic absorption material 7 bottom it, described transducer 4 to be measured is placed in de aerated water 8.The framework of described tank 6 is selected as the higher material of laser-transmitting rate, as glass, transparent polymer etc., but is not limited to cited example herein.
Described image collecting device 9, for receiving the light beam after through focus 5, gathers deflected beam image.In the present embodiment, described image collecting device 9 is selected as CCD camera, certainly, can select the image capture device of other kind according to demand, is not limited to cited example herein.
Described control treatment device 10 is connected to described transducer displacement regulating device 3 and image collecting device 9, for the movement of regulable control transducer 4 to be measured, and calculates for light beam image process and acoustic pressure.In the present embodiment, described control treatment device 10 can be selected as computing machine or intelligent movable equipment, as mobile phone, panel computer etc.
As shown in Figure 3, after described laser beam device for thinning 11 is positioned over laser instrument 1, attenuate for the laser beam 2 that laser instrument 1 is launched, make to be less than sound wave by laser beam 2 diameter of focus 5 long.In the present embodiment, described laser beam device for thinning 11 comprises the first optics convex lens and the second optics convex lens that arrange in turn along light path, the focus of described first optics convex lens overlaps with the focus of described second optics convex lens, further, the focal length of described first optics convex lens is greater than the focal length of described second optics convex lens.Diameter before and after the refinement of described laser beam 2 meets formula D1/D2=f1/f2, and wherein, D1, D2 are respectively laser beam 2 diameter before and after refinement, and f1, f2 are respectively the focal length of the first optics convex lens and the second optics convex lens.In practical application, under the condition meeting explained hereafter, can according to the first optics convex lens, the focal length ratio of the second optics convex lens obtains the light pencil wanted.
As shown in Figure 4, before described deflection angle multiplying arrangement 12 is positioned over image collecting device 9, for the deflection angle of the laser beam 2 through focus 5 outgoing is amplified, the deflection distance of the laser beam 2 that image collecting device 9 is received is as far as possible large, to make image collecting device 9 when focal point 5 is nearer, light deflection distance can be differentiated and accurately record.Exemplarily, described deflection angle multiplying arrangement 12 comprises one or more divergent lens, for dispersing laser beam 2, the deflection angle of laser beam 2 is increased.In the present embodiment, described deflection angle multiplying arrangement 12 comprises a divergent lens, certainly, can select different divergent lens combinations, be not limited to cited example herein according to demand.
The present embodiment also provides a kind of measuring method of focus supersonic focus sound pressure measurement instrument, comprises step:
Step 1), transducer 4 to be measured is in place on displacement regulating device, injects appropriate de aerated water 8 in tank 6, flood transducer 4 to be measured.
Step 2), opening power, makes laser instrument 1, transducer, CCD camera, calculating function normally works.
Step 3), the position of operation computing machine regulating and controlling transducer, makes laser beam 2 just through focus 5, forms symmetrical oval hot spot and fixes the position of transducer 4 to be measured when being of a size of maximum.
Step 4), gather light spot image by CCD camera and upload to computing machine.
Step 5), process light spot image, the relation according to focus acoustic pressure and deflection distance obtains sound pressure level.
Embodiment 2
As shown in Figure 5, the present embodiment provides a kind of focus supersonic focus sound pressure measurement instrument, comprising: laser instrument 1, transducer displacement regulating device 3, tank 6, transducer to be measured 4, image collecting device 9, control treatment device 10 and laser beam device for thinning 11.
Described laser instrument 1 is for Emission Lasers bundle 2, and the initial diameter of described laser beam 2 is D1.
Described transducer displacement regulating device 3, for fixing and regulate the position of described transducer to be measured 4, to adjust the focus 5 of described transducer to be measured 4.Particularly, described transducer displacement regulating device 3 can adjust upper-lower position and the right position of described transducer to be measured 4.
Described tank 6, for holding de aerated water 8, is provided with acoustic absorption material 7 bottom it, described transducer 4 to be measured is placed in de aerated water 8.The framework of described tank 6 is selected as the higher material of laser-transmitting rate, as glass, transparent polymer etc., but is not limited to cited example herein.
Described image collecting device 9, for receiving the light beam after through focus 5, gathers deflected beam image.In the present embodiment, described image collecting device 9 is selected as CCD camera, certainly, can select the image capture device of other kind according to demand, is not limited to cited example herein.
Described control treatment device 10 is connected to described transducer displacement regulating device 3 and image collecting device 9, for the movement of regulable control transducer 4 to be measured, and calculates for light beam image process and acoustic pressure.In the present embodiment, described control treatment device 10 can be selected as computing machine or intelligent movable equipment, as mobile phone, panel computer etc.
As shown in Figure 3, after described laser beam device for thinning 11 is positioned over laser instrument 1, attenuate for the laser beam 2 that laser instrument 1 is launched, make to be less than sound wave by laser beam 2 diameter of focus 5 long.In the present embodiment, described laser beam device for thinning 11 comprises the first optics convex lens and the second optics convex lens that arrange in turn along light path, the focus of described first optics convex lens overlaps with the focus of described second optics convex lens, further, the focal length of described first optics convex lens is greater than the focal length of described second optics convex lens.Diameter before and after the refinement of described laser beam 2 meets formula D1/D2=f1/f2, and wherein, D1, D2 are respectively laser beam 2 diameter before and after refinement, and f1, f2 are respectively the focal length of the first optics convex lens and the second optics convex lens.In practical application, under the condition meeting explained hereafter, can according to the first optics convex lens, the focal length ratio of the second optics convex lens obtains the light pencil wanted.
Embodiment 3
As shown in Figure 6, the present embodiment provides a kind of focus supersonic focus sound pressure measurement instrument, comprising: laser instrument 1, transducer displacement regulating device 3, tank 6, transducer to be measured 4, image collecting device 9, control treatment device 10 and deflection angle multiplying arrangement 12.
Described laser instrument 1 is for Emission Lasers bundle 2, and the initial diameter of described laser beam 2 is D1.
Described transducer displacement regulating device 3, for fixing and regulate the position of described transducer to be measured 4, to adjust the focus 5 of described transducer to be measured 4.Particularly, described transducer displacement regulating device 3 can adjust upper-lower position and the right position of described transducer to be measured 4.
Described tank 6, for holding de aerated water 8, is provided with acoustic absorption material 7 bottom it, described transducer 4 to be measured is placed in de aerated water 8.The framework of described tank 6 is selected as the higher material of laser-transmitting rate, as glass, transparent polymer etc., but is not limited to cited example herein.
Described image collecting device 9, for receiving the light beam after through focus 5, gathers deflected beam image.In the present embodiment, described image collecting device 9 is selected as CCD camera, certainly, can select the image capture device of other kind according to demand, is not limited to cited example herein.
Described control treatment device 10 is connected to described transducer displacement regulating device 3 and image collecting device 9, for the movement of regulable control transducer 4 to be measured, and calculates for light beam image process and acoustic pressure.In the present embodiment, described control treatment device 10 can be selected as computing machine or intelligent movable equipment, as mobile phone, panel computer etc.
As shown in Figure 4, before described deflection angle multiplying arrangement 12 is positioned over image collecting device 9, for the deflection angle of the laser beam 2 through focus 5 outgoing is amplified, the deflection distance of the laser beam 2 that image collecting device 9 is received is as far as possible large, to make image collecting device 9 when focal point 5 is nearer, light deflection distance can be differentiated and accurately record.Exemplarily, described deflection angle multiplying arrangement 12 comprises one or more divergent lens, for dispersing laser beam 2, the deflection angle of laser beam 2 is increased.In the present embodiment, described deflection angle multiplying arrangement 12 comprises a divergent lens, certainly, can select different divergent lens combinations, be not limited to cited example herein according to demand.
As mentioned above, focus supersonic focus sound pressure measurement instrument of the present utility model, has following beneficial effect: the utility model can facilitate the focus supersonic focus acoustic pressure measured different transducer accurately and produce, and measuring process can not cause interference to sound field.Laser beam device for thinning 11 can make to narrow through the light beam of focus area, is conducive to the accurate measurement of focus acoustic pressure.Deflection angle can amplify by deflection angle multiplying arrangement 12, when CCD camera focal point is nearer, deflection distance also can be made maximum, and this is conducive to the overall length shortening measuring system, saves space.The utility model structure is simple, and Be very effective, is with a wide range of applications in focus supersonic focus sound pressure measurement field.So the utility model effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any person skilled in the art scholar all without prejudice under spirit of the present utility model and category, can modify above-described embodiment or changes.Therefore, such as have in art and usually know that the knowledgeable modifies or changes not departing from all equivalences completed under the spirit and technological thought that the utility model discloses, must be contained by claim of the present utility model.
Claims (10)
1. a focus supersonic focus sound pressure measurement instrument, it is characterized in that, comprise: laser instrument, transducer displacement regulating device, tank, transducer to be measured, image collecting device, control treatment device, and comprise at least one in laser beam device for thinning and deflection angle multiplying arrangement; Described laser instrument is used for Emission Lasers bundle; Described transducer displacement regulating device is used for the position fixing and regulate described transducer to be measured; Described tank is used for holding de aerated water, and described transducer to be measured is placed in de aerated water; Described image collecting device, for receiving the light beam after through focus, gathers deflected beam image; Described control treatment device is connected to described transducer displacement regulating device and image collecting device, for the movement of regulable control transducer to be measured, and calculates for light beam image process and acoustic pressure; After described laser beam device for thinning is positioned over laser instrument, attenuate for the laser beam that laser instrument is launched, make to be less than sound wave by the lasing beam diameter of focus long; Before described deflection angle multiplying arrangement is positioned over image collecting device, for the deflection angle of the laser beam through focus outgoing is amplified, the deflection distance of the laser beam that image collecting device is received is as far as possible large, to make image collecting device when focal point is nearer, light deflection distance can be differentiated and accurately record.
2. focus supersonic focus sound pressure measurement instrument according to claim 1, it is characterized in that: described focus supersonic focus sound pressure measurement instrument is provided with laser beam device for thinning, after being positioned over laser instrument, laser beam for being launched by laser instrument attenuates, and makes to be less than sound wave by the lasing beam diameter of focus long.
3. focus supersonic focus sound pressure measurement instrument according to claim 1, it is characterized in that: described focus supersonic focus sound pressure measurement instrument is provided with deflection angle multiplying arrangement, before being positioned over image collecting device, for the deflection angle of the laser beam through focus outgoing is amplified, the deflection distance of the laser beam that image collecting device is received is as far as possible large, make image collecting device when focal point is nearer, light deflection distance can be differentiated and accurately record.
4. focus supersonic focus sound pressure measurement instrument according to claim 1, it is characterized in that: described focus supersonic focus sound pressure measurement instrument is provided with laser beam device for thinning and deflection angle multiplying arrangement simultaneously, after described laser beam device for thinning is positioned over laser instrument, laser beam for being launched by laser instrument attenuates, and makes to be less than sound wave by the lasing beam diameter of focus long; Before described deflection angle multiplying arrangement is positioned over image collecting device, for the deflection angle of the laser beam through focus outgoing is amplified, the deflection distance of the laser beam that image collecting device is received is as far as possible large, make image collecting device when focal point is nearer, light deflection distance can be differentiated and accurately record.
5. focus supersonic focus sound pressure measurement instrument according to claim 1, it is characterized in that: described laser beam device for thinning comprises the first optics convex lens and the second optics convex lens that arrange in turn along light path, the focus of described first optics convex lens overlaps with the focus of described second optics convex lens, further, the focal length of described first optics convex lens is greater than the focal length of described second optics convex lens.
6. focus supersonic focus sound pressure measurement instrument according to claim 5, it is characterized in that: the diameter before and after described laser beam refinement meets formula D1/D2=f1/f2, wherein, D1, D2 are respectively the lasing beam diameter before and after refinement, and f1, f2 are respectively the focal length of the first optics convex lens and the second optics convex lens.
7. focus supersonic focus sound pressure measurement instrument according to claim 1, is characterized in that: described deflection angle multiplying arrangement comprises one or more divergent lens, for dispersing laser beam, the deflection angle of laser beam is increased.
8. focus supersonic focus sound pressure measurement instrument according to claim 1, is characterized in that: described control treatment device comprises the one in computing machine and intelligent movable equipment.
9. focus supersonic focus sound pressure measurement instrument according to claim 1, is characterized in that: described image collecting device comprises CCD camera.
10. focus supersonic focus sound pressure measurement instrument according to claim 1, is characterized in that: described bottom of gullet is provided with acoustic absorption material.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768267A (en) * | 2015-11-19 | 2017-05-31 | 重庆医科大学 | One kind focuses on ultrasound focus sound pressure measurement instrument |
| CN107014476A (en) * | 2017-03-07 | 2017-08-04 | 中国石油大学(华东) | A kind of method of sound pressure amplitudes in utilization acoustic levitation drop measurement liquid |
| CN107689185A (en) * | 2017-10-31 | 2018-02-13 | 河南科技大学 | A kind of apparatus for demonstrating of light in refraction gradient for the Propagation path of constant |
| CN109387276A (en) * | 2017-08-02 | 2019-02-26 | 重庆海扶医疗科技股份有限公司 | Ultrasonic sound intersity measurement method and system |
| CN110907027A (en) * | 2019-11-25 | 2020-03-24 | 华南理工大学 | Sound pressure measurement device and method based on thin liquid film guided wave leakage mode |
| CN110954207A (en) * | 2019-11-15 | 2020-04-03 | 重庆医科大学 | Detection device and detection method for focused ultrasound focus sound wave structure |
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2015
- 2015-11-19 CN CN201520923702.7U patent/CN205157037U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768267A (en) * | 2015-11-19 | 2017-05-31 | 重庆医科大学 | One kind focuses on ultrasound focus sound pressure measurement instrument |
| CN107014476A (en) * | 2017-03-07 | 2017-08-04 | 中国石油大学(华东) | A kind of method of sound pressure amplitudes in utilization acoustic levitation drop measurement liquid |
| CN109387276A (en) * | 2017-08-02 | 2019-02-26 | 重庆海扶医疗科技股份有限公司 | Ultrasonic sound intersity measurement method and system |
| CN107689185A (en) * | 2017-10-31 | 2018-02-13 | 河南科技大学 | A kind of apparatus for demonstrating of light in refraction gradient for the Propagation path of constant |
| CN110954207A (en) * | 2019-11-15 | 2020-04-03 | 重庆医科大学 | Detection device and detection method for focused ultrasound focus sound wave structure |
| CN110907027A (en) * | 2019-11-25 | 2020-03-24 | 华南理工大学 | Sound pressure measurement device and method based on thin liquid film guided wave leakage mode |
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