CN215639754U - Ultrasonic sound pressure testing device based on laser vibrometer - Google Patents
Ultrasonic sound pressure testing device based on laser vibrometer Download PDFInfo
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- CN215639754U CN215639754U CN202122312792.4U CN202122312792U CN215639754U CN 215639754 U CN215639754 U CN 215639754U CN 202122312792 U CN202122312792 U CN 202122312792U CN 215639754 U CN215639754 U CN 215639754U
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Abstract
The utility model discloses an ultrasonic sound pressure testing device based on a laser vibrometer, which relates to the technical field of sound pressure testing and comprises a water tank, a transducer mechanism, an acoustic transmission and reflection film mechanism and a laser vibrometer mechanism, wherein the transducer mechanism comprises an ultrasonic transducer, the acoustic transmission and reflection film mechanism comprises an adjusting structure and an acoustic transmission and reflection film, the adjusting structure is arranged on the water tank, the acoustic transmission and reflection film is connected with the adjusting structure, the laser vibrometer mechanism comprises a laser vibrometer and a fixing structure, the laser vibrometer is arranged on the upper edge of the water tank through the fixing structure, the laser vibrometer is electrically connected with a first acquisition and analysis module outside the water tank, the laser vibrometer, the acoustic transmission and reflection film and the ultrasonic transducer are sequentially arranged from top to bottom, the laser vibrometer is positioned above the liquid level of the water tank, and the acoustic transmission and reflection film and the ultrasonic transducer are both positioned below the liquid level of the water tank. The utility model solves the difficult problem of fixing the laser interferometer, so that the laser vibrometer can better obtain signals and the test accuracy is high.
Description
Technical Field
The utility model relates to the technical field of sound pressure testing, in particular to an ultrasonic sound pressure testing device based on a laser vibrometer.
Background
The existing ultrasonic sound pressure testing device for measuring the laser vibration meter based on the laser interferometer is to fix the laser vibration meter on a three-dimensional control bracket, and can drive the laser vibration meter to move through three-dimensional control, or place the laser vibration meter at one side of a water tank, as shown in fig. 1. And carrying out vibration measurement on the sound-transmitting light-reflecting film through the sound-transmitting window. However, both of the above-mentioned methods have certain disadvantages.
The laser vibrometer is fixed on the three-dimensional control support, because the weight restriction and the angle modulation difficult problem of control support, direct control can arouse the angle modulation difficulty of laser vibrometer on the support, simultaneously, because the length restriction of laser vibrometer, so fixed, very easily take place dangers such as fall. When the three-dimensional control support moves, vibration signals caused by the movement of the three-dimensional control support seriously influence signal acquisition of the laser vibration meter, the signal interference is large, and the accuracy of measurement results is low.
The laser vibration meter is arranged on the side face of the water tank, and data acquisition is carried out through the sound-transmitting window. Moreover, the sound-transmitting and light-reflecting film cannot be close to the sound-transmitting window, so that stronger sound signal reflection can be caused, and the measurement signal is directly influenced. The sound-transmitting and light-reflecting film has a certain distance from the sound-transmitting window, which can cause the signal energy to weaken, and the light signal can directly influence the measuring result in the refraction and transmission phenomena caused by the penetration of the sound-transmitting window, water and air.
Therefore, the two methods proposed above have large measurement errors and disadvantages.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an ultrasonic sound pressure testing device based on a laser vibration meter, which solves the difficult problem of fixation of the laser interferometer, enables the laser vibration meter to better obtain signals and has high testing accuracy.
In order to achieve the purpose, the utility model provides the following scheme:
the utility model provides an ultrasonic sound pressure testing device based on a laser vibrometer, which comprises a water tank, an energy converter mechanism, an acoustic transmission and reflection film mechanism and a laser vibrometer mechanism, wherein the water tank is used for containing liquid, the energy converter mechanism comprises an ultrasonic energy converter, the acoustic transmission and reflection film mechanism comprises an adjusting structure and an acoustic transmission and reflection film, the adjusting structure is arranged on the water tank, the acoustic transmission and reflection film is connected with the adjusting structure, the laser vibrometer mechanism comprises a laser vibrometer and a fixing structure, the laser vibrometer is arranged on the upper edge of the water tank through the fixing structure, the laser vibrometer is electrically connected with a first acquisition and analysis module outside the water tank, the laser vibrometer, the acoustic transmission and reflection film and the ultrasonic energy converter are sequentially arranged from top to bottom, the laser vibrometer is positioned above the liquid level of the water tank, the sound-transmitting and light-reflecting film and the ultrasonic transducer are both positioned below the liquid level of the water tank.
Preferably, the transducer mechanism further comprises a first support and a clamp, the first support is connected with a first moving mechanism outside the water tank, the clamp is used for clamping the ultrasonic transducer, the clamp is detachably connected with the first support, a plurality of first connecting holes are formed in the first support, and the connecting positions of the clamp and the first support are adjusted by connecting the clamp with different first connecting holes.
Preferably, the sound-transmitting and light-reflecting film mechanism further comprises a fixing frame, and the fixing frame is used for fixing the sound-transmitting and light-reflecting film.
Preferably, the adjusting structure comprises two adjusting parts, each adjusting part comprises an angle adjuster and a connecting plate, the angle adjuster is used for adjusting the angle of the sound-transmitting and light-reflecting film, one end of the angle adjuster is connected with the water tank, the other end of the angle adjuster is connected with the connecting plate, the fixing frame is detachably connected with the connecting plate, a plurality of second connecting holes are formed in the connecting plate, and the fixing frame is connected with different second connecting holes to adjust the connecting position of the fixing frame and the connecting plate so as to adjust the height of the sound-transmitting and light-reflecting film.
Preferably, the fixing structure comprises a fixing plate and two fixing portions, each fixing portion comprises two clamping structures, the clamping structures are detachably connected with the fixing plate, a plurality of third connecting holes are formed in the fixing plate, the clamping structures are connected with different third connecting holes to adjust the connecting positions of the clamping structures and the fixing plate so as to adapt to the water tanks with different sizes, the fixing plate is erected on the upper edge of the water tank, and the two clamping structures of each fixing portion clamp the upper edge of the water tank.
Preferably, each clamping structure all includes riser and bolt, the bolt with riser threaded connection, the riser with the fixed plate sets up perpendicularly, just the riser with the fixed plate can be connected with dismantling, through with the riser with different the third connecting hole is connected the regulation the riser with the hookup location of fixed plate and then adapt to not unidimensional basin.
Preferably, the laser vibration meter mechanism further comprises a connecting portion, the connecting portion is detachably connected with the laser vibration meter and the fixing plate, a plurality of fourth connecting holes are formed in the fixing plate, and the connecting portion is connected with different fourth connecting holes to adjust the connecting position of the connecting portion and the fixing plate.
Preferably, the ultrasonic sound pressure testing device based on the laser vibrometer further comprises a hydrophone, the hydrophone is located below the liquid level of the water tank and is connected through a second support, the second support is connected with a second moving mechanism outside the water tank, and the hydrophone is electrically connected with a second acquisition and analysis module.
Preferably, the second support is provided with a through hole, and the hydrophone is arranged in the through hole.
Preferably, the ultrasonic transducer is electrically connected with a transducer transmitting end outside the water tank.
Compared with the prior art, the utility model has the following technical effects:
the utility model can carry out non-contact type sound pressure measurement on the ultrasonic sound pressure of the ultrasonic transducer, and utilizes the vibration and reflection performance of the sound-transmitting and light-reflecting film to carry out vibration signal detection on the sound-transmitting and light-reflecting film through the laser interferometer to obtain the ultrasonic sound pressure. The utility model can realize the three-dimensional movement of the ultrasonic transducer, obtain the measurement data of the laser interferometer in real time and carry out ultrasonic sound pressure measurement in the degassing water tank. The non-contact measurement of the laser interferometer avoids the influence of high sound intensity, high temperature and the like of the ultrasonic transducer focus. The test device is provided for the measurement and calibration of the ultrasonic transducers with different frequencies under the conditions of high power and high sound intensity.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of an ultrasonic sound pressure testing device based on a laser vibrometer in the prior art;
FIG. 2 is a schematic diagram of an ultrasonic sound pressure testing device based on a laser vibrometer according to the present invention;
FIG. 3 is a schematic view of the connection of a first bracket and a clamp according to the present invention;
FIG. 4a is a first view of the fixture of the present invention;
FIG. 4b is a second schematic view of the clamp of the present invention;
FIG. 4c is a third schematic view of the clamp of the present invention;
FIG. 4d is a fourth schematic view of the clamp of the present invention;
FIG. 4e is a fifth schematic view of the clamp of the present invention;
FIG. 4f is a sixth schematic view of the clamp of the present invention;
FIG. 5 is a schematic view of a second bracket of the present invention;
FIG. 6 is a schematic view of a fastening structure of the present invention;
wherein: 100-ultrasonic sound pressure testing device based on laser vibrometer, 1-water tank, 2-ultrasonic transducer, 3-sound-transparent reflective film, 4-laser vibrometer, 5-first support, 6-clamp, 7-first connecting hole, 8-fixing support, 9-connecting plate, 10-fixing structure, 11-fixing plate, 12-clamping structure, 13-third connecting hole, 14-vertical plate, 15-bolt, 16-connecting part, 17-fourth connecting hole, 18-hydrophone, 19-second support, 20-through hole, 21-transducer transmitting end, 22-first collecting and analyzing module, and 23-second collecting and analyzing module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The utility model aims to provide an ultrasonic sound pressure testing device based on a laser vibration meter, which solves the difficult problem of fixation of the laser interferometer, enables the laser vibration meter to better obtain signals and has high testing accuracy.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 2-3, 4 a-4 f, 5-6: the embodiment provides an ultrasonic sound pressure testing device 100 based on a laser vibrometer, which comprises a water tank 1, a transducer mechanism, an acoustic transmission and reflection film mechanism and a laser vibrometer mechanism, wherein the water tank 1 is used for containing liquid (water), the transducer mechanism comprises an ultrasonic transducer 2, the acoustic transmission and reflection film mechanism comprises an adjusting structure and an acoustic transmission and reflection film 3, the acoustic transmission and reflection film 3 is a polyester film, the adjusting structure is arranged on the water tank 1, the acoustic transmission and reflection film 3 is connected with the adjusting structure, the laser vibrometer mechanism comprises a laser vibrometer 4 and a fixed structure 10, the laser vibrometer 4 is arranged on the upper edge of the water tank 1 through the fixed structure 10, the laser vibrometer 4 is electrically connected with a first acquisition and analysis module 22 outside the water tank 1, the first acquisition and analysis module 22 is the prior art and is used for storing acquired data and the like, the laser vibrometer 4, the acoustic transmission and reflection film 3 and the ultrasonic transducer 2 are sequentially arranged from top to bottom, namely, the laser vibration meter 4, the sound-transmitting and light-reflecting film 3 and the ultrasonic transducer 2 are positioned on the same vertical surface, the laser vibration meter 4 is positioned above the liquid level of the water tank 1, and the sound-transmitting and light-reflecting film 3 and the ultrasonic transducer 2 are both positioned below the liquid level of the water tank 1.
In this embodiment, the transducer mechanism further includes a first support 5 and a clamp 6, the first support 5 is connected to a first moving mechanism outside the water tank 1, the clamp 6 is used for clamping the ultrasonic transducer 2, the clamp 6 is detachably connected to the first support 5, a plurality of first connecting holes 7 are provided in the first support 5, and the connecting positions of the clamp 6 and the first support 5 are adjusted by connecting the clamp 6 to different first connecting holes 7.
In this embodiment, anchor clamps 6 make ultrasonic transducer 2 be vertical state, make ultrasonic transducer 2 upwards or launch downwards, anchor clamps 6 include link and exposed core, and the link is provided with the connecting hole, and the connecting hole passes through the screw to be connected with first through-hole 20, and the exposed core is the staple bolt structure, through changing different anchor clamps 6 with the ultrasonic transducer 2 of adaptation different diameters.
In this embodiment, the first support 5 includes a horizontal support and a vertical support, the horizontal support is perpendicular to the vertical support, the horizontal support is provided with a plurality of first connection holes 7, and the vertical support is connected with a first moving mechanism outside the water tank 1.
In this embodiment, the acoustically transparent reflective film mechanism further includes a fixing frame 8, and the fixing frame 8 is used for fixing the acoustically transparent reflective film 3.
In this embodiment, adjust the structure and include two regulation portions, each regulation portion all includes angle regulator and connecting plate 9, angle regulator is prior art, angle regulator is used for adjusting the angle of sound-transparent reflection of light film 3, angle regulator's one end is connected with basin 1, angle regulator's the other end is connected with connecting plate 9, mount 8 can be connected with connecting plate 9 with dismantling, be provided with a plurality of second connecting holes on the connecting plate 9, through being connected the hookup location of adjusting mount 8 and connecting plate 9 with mount 8 and different second connecting hole and then adjust the height of sound-transparent reflection of light film 3.
In this embodiment, fixed knot constructs 10 including fixed plate 11 and two fixed parts, each fixed part includes two clamping structure 12 respectively, clamping structure 12 all can be connected with fixed plate 11 with dismantling, be provided with a plurality of third connecting holes 13 on the fixed plate 11, through being connected the hookup location of adjusting clamping structure 12 and fixed plate 11 with clamping structure 12 and different third connecting hole 13 and then adapt to not unidimensional basin 1, fixed plate 11 sets up the last edge at basin 1, and two clamping structure 12 centre gripping of each fixed part follow the last edge of basin 1.
In this embodiment, each clamping structure 12 all includes riser 14 and bolt 15, bolt 15 and riser 14 threaded connection, and riser 14 sets up with fixed plate 11 is perpendicular, and riser 14 is connected with fixed plate 11 can be dismantled, and through being connected the hookup location of adjusting riser 14 and fixed plate 11 and then adapt to not unidimensional basin 1 with riser 14 and different third connecting hole 13. One end of each bolt 15 is provided with a spacer.
In this embodiment, the laser vibration meter mechanism further includes a connecting portion 16, the connecting portion 16 is detachably connected to both the laser vibration meter 4 and the fixing plate 11, the fixing plate 11 is provided with a plurality of fourth connecting holes 17, and the connecting portion 16 and the fixing plate 11 are connected to adjust the connecting position of the connecting portion 16 and the fixing plate 11 by connecting the connecting portion 16 and different fourth connecting holes 17. The laser vibration meter 4 is connected with the connecting part 16, so that the laser vibration meter 4 extends out of the fixing plate 11, and the fixing plate 11 is prevented from interfering with the laser vibration meter 4. The laser beam of the laser vibration meter 4 is vertically incident to the water surface, so that the acousto-optic interaction is avoided. The laser vibration meter 4 of the embodiment has the advantages of interference resistance and micro-vibration detection through the acquisition mode, can obtain better signals, and has high test accuracy.
The present embodiment solves the problem of fixing the laser vibrometer 4 through the fixing structure 10.
In this embodiment, the ultrasonic sound pressure testing apparatus 100 based on the laser vibrometer further includes a hydrophone 18, the hydrophone 18 is located below the liquid level of the water tank 1, the hydrophone 18 is connected through a second support 19, the second support 19 is connected to a second moving mechanism outside the water tank 1, the hydrophone 18 is electrically connected to a second collecting and analyzing module 23, and the second collecting and analyzing module 23 is in the prior art and is used for signal collection, data analysis and the like. The second holder 19 is provided with through holes 20, and the hydrophone 18 is disposed in the through holes 20. The hydrophone 18 is used to verify the accuracy of the laser interferometer.
In this embodiment, the ultrasonic transducer 2 is electrically connected to the transducer emitting end 21 outside the water tank 1.
In this embodiment, the first collecting and analyzing module 22 and the second collecting and analyzing module 23 are both of the conventional structure, and the collection of signals and the analysis of data are the conventional techniques.
In the embodiment, the sound-transmitting and light-reflecting film 3 is placed in a sound field, the vibration displacement or speed of the sound-transmitting and light-reflecting film 3 is measured by using the laser vibration meter 4, and then the sound pressure is calculated.
The embodiment can perform non-contact sound pressure measurement on the ultrasonic sound pressure of the ultrasonic transducer 2, and the vibration and reflection performance of the sound-transmitting and reflecting film 3 is utilized to perform vibration signal detection on the sound-transmitting and reflecting film 3 through the laser interferometer, so as to obtain the ultrasonic sound pressure. The embodiment can realize the three-dimensional movement of the ultrasonic transducer 2, obtain the measurement data of the laser interferometer in real time and measure the ultrasonic sound pressure in the degassing water tank 1. The non-contact measurement of the laser interferometer avoids the influence of high sound intensity, high temperature and the like of the focus of the ultrasonic transducer 2. The device provides a test device for the metering calibration of the ultrasonic transducer 2 with different frequencies under the conditions of high power and high sound intensity.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the utility model.
Claims (10)
1. The utility model provides an supersound acoustic pressure testing arrangement based on laser vibrometer which characterized in that: comprises a water tank, an energy converter mechanism, a sound-transmitting and light-reflecting film mechanism and a laser vibration meter mechanism, wherein the water tank is used for containing liquid, the transducer mechanism comprises an ultrasonic transducer, the sound-transmitting and light-reflecting film mechanism comprises an adjusting structure and a sound-transmitting and light-reflecting film, the adjusting structure is arranged on the water tank, the sound-transmitting and light-reflecting film is connected with the adjusting structure, the laser vibration meter mechanism comprises a laser vibration meter and a fixing structure, the laser vibration meter is arranged on the upper edge of the water tank through the fixing structure, the laser vibration meter is electrically connected with the first acquisition and analysis module outside the water tank, the laser vibration meter, the sound-transmitting and light-reflecting film and the ultrasonic transducer are sequentially arranged from top to bottom, the laser vibration meter is positioned above the liquid level of the water tank, and the sound-transmitting and light-reflecting film and the ultrasonic transducer are both positioned below the liquid level of the water tank.
2. The ultrasonic sound pressure testing device based on the laser vibrometer according to claim 1, characterized in that: the energy converter mechanism further comprises a first support and a clamp, the first support is connected with a first moving mechanism outside the water tank, the clamp is used for clamping the ultrasonic energy converter, the clamp is detachably connected with the first support, a plurality of first connecting holes are formed in the first support, and the connecting position of the clamp and the first support is adjusted by connecting the clamp with different first connecting holes.
3. The ultrasonic sound pressure testing device based on the laser vibrometer according to claim 1, characterized in that: the sound-transmitting and light-reflecting film mechanism further comprises a fixing frame, and the fixing frame is used for fixing the sound-transmitting and light-reflecting film.
4. The ultrasonic sound pressure testing device based on the laser vibrometer according to claim 3, characterized in that: the adjusting structure comprises two adjusting parts, each adjusting part comprises an angle adjuster and a connecting plate, the angle adjuster is used for adjusting the angle of the sound-transmitting and light-reflecting film, one end of the angle adjuster is connected with the water tank, the other end of the angle adjuster is connected with the connecting plate, the fixing frame is detachably connected with the connecting plate, a plurality of second connecting holes are formed in the connecting plate, and the fixing frame is connected with the different second connecting holes to adjust the connecting position of the fixing frame and the connecting plate so as to adjust the height of the sound-transmitting and light-reflecting film.
5. The ultrasonic sound pressure testing device based on the laser vibrometer according to claim 1, characterized in that: the fixing structure comprises a fixing plate and two fixing portions, each fixing portion comprises two clamping structures, the clamping structures are detachably connected with the fixing plate, a plurality of third connecting holes are formed in the fixing plate, the clamping structures are connected with different third connecting holes to adjust the connecting positions of the clamping structures and the fixing plate so as to adapt to the water tanks of different sizes, the fixing plate is erected on the upper edge of the water tank, and the two clamping structures of each fixing portion clamp the upper edge of the water tank.
6. The ultrasonic sound pressure testing device based on the laser vibrometer according to claim 5, characterized in that: each clamping structure all includes riser and bolt, the bolt with riser threaded connection, the riser with the fixed plate sets up perpendicularly, just the riser with the fixed plate can be connected with dismantling, through with the riser with the difference the third connecting hole is connected the regulation the riser with the hookup location of fixed plate and then adapt to not unidimensional the basin.
7. The ultrasonic sound pressure testing device based on the laser vibrometer according to claim 5, characterized in that: the laser vibration meter mechanism further comprises a connecting portion, the connecting portion is detachably connected with the laser vibration meter and the fixing plate, a plurality of fourth connecting holes are formed in the fixing plate, and the connecting portion is connected with the different fourth connecting holes to be adjusted to the connecting position of the connecting portion and the fixing plate.
8. The ultrasonic sound pressure testing device based on the laser vibrometer according to claim 1, characterized in that: the ultrasonic sound pressure testing device based on the laser vibrometer further comprises a hydrophone, the hydrophone is located below the liquid level of the water tank and is connected with a second support, the second support is connected with a second moving mechanism outside the water tank, and the hydrophone is electrically connected with a second acquisition and analysis module.
9. The ultrasonic sound pressure testing device based on the laser vibrometer according to claim 8, characterized in that: the second support is provided with a through hole, and the hydrophone is arranged in the through hole.
10. The ultrasonic sound pressure testing device based on the laser vibrometer according to claim 1, characterized in that: the ultrasonic transducer is electrically connected with the transmitting end of the transducer outside the water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122312792.4U CN215639754U (en) | 2021-09-24 | 2021-09-24 | Ultrasonic sound pressure testing device based on laser vibrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202122312792.4U CN215639754U (en) | 2021-09-24 | 2021-09-24 | Ultrasonic sound pressure testing device based on laser vibrometer |
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| CN215639754U true CN215639754U (en) | 2022-01-25 |
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| CN202122312792.4U Active CN215639754U (en) | 2021-09-24 | 2021-09-24 | Ultrasonic sound pressure testing device based on laser vibrometer |
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- 2021-09-24 CN CN202122312792.4U patent/CN215639754U/en active Active
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