An ultrasonic transducer sound field characteristic testing device

Abstract

The utility model provides an ultrasonic transducer sound field characteristic testing arrangement, including support fixed platform, installs position adjusting mechanism on it, base, install in position adjusting mechanism, position adjusting mechanism is used at least for adjusting the horizontal position of base relative to support fixed platform, centering and clamping subassembly, install in base, centering and clamping subassembly are used for clamping ultrasonic transducer, locking subassembly, install in base, for locking centering and clamping subassembly in specified position, or unlock centering and clamping subassembly, the sound attenuation water tank is located below base, be equipped with hydrophone in sound attenuation water tank, position adjusting mechanism is suitable for moving base to adjust the centering and clamping center of centering and clamping subassembly with hydrophone in vertical alignment. The utility model can be used to solve the technical problem of ultrasonic transducer detection process in the prior art relies on artificial centering, and it is difficult to guarantee detection precision and detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic testing technology, and in particular to a device for testing the acoustic field characteristics of an ultrasonic transducer. Background Technology

[0002] As a core component in the field of medical ultrasound, the sound field distribution characteristics (such as sound pressure distribution, beamwidth, sound intensity, focal position, sidelobe level, etc.) of the ultrasonic transducer are key indicators for evaluating its performance. Accurate measurement of these characteristics is crucial for the design, optimization and application of the transducer.

[0003] Currently, in laboratory environments, the testing of transducer acoustic field characteristics typically employs the hydrophone scanning method. This method places the transducer under test and a hydrophone in an anechoic tank, and uses a precision displacement mechanism to drive the hydrophone to perform a three-dimensional scan within the transducer's acoustic field region, measuring the sound pressure signal point by point to reconstruct the complete acoustic field distribution.

[0004] A crucial prerequisite for this measurement process is ensuring that the center of the hydrophone's sensitive element is precisely coaxial with the transducer's beam axis (i.e., the central axis of the sound field). If there is an axial misalignment, the measured maximum sound pressure will not be the true sound pressure on the sound axis, leading to distortion in the reconstructed sound field image. This will result in significant errors in key parameters such as the measured sound pressure level and -6dB beamwidth, severely impacting the accuracy and reliability of the test results.

[0005] Existing methods for adjusting the balance generally suffer from the following drawbacks: 1. Cumbersome operation, relying heavily on manual experience: Currently, it mainly relies on the operator's visual observation and manual adjustment. First, a rough adjustment is needed to roughly align the transducer and hydrophone. Then, a small driving electrical signal is applied to make the transducer emit ultrasonic waves. The operator needs to repeatedly fine-tune the position of the transducer or hydrophone in multiple dimensions (such as X, Y, Z axes and deflection angle) while observing the magnitude of the hydrophone's output signal (such as voltage value).

[0006] 2. The process is time-consuming and inefficient: After each fine-tuning, it is necessary to re-emit the ultrasonic wave and read the hydrophone response value to determine if the signal has increased, thereby confirming whether the adjustment direction is correct. This is a multi-iterative process of "movement-emission-measurement-judgment," which consumes a lot of time and has extremely low testing efficiency.

[0007] 3. Difficulty in achieving true optimal alignment: Due to the lack of a clear physical reference and automatic feedback mechanism, it is difficult to find the point of absolute maximum sound pressure level by manual adjustment, that is, it is impossible to achieve true "coaxiality". The final result is often suboptimal, which limits the further improvement of measurement accuracy.

[0008] 4. Operational risks exist: During repeated adjustments and tests, the transducer may collide with the hydrophone due to misoperation, or excessive power may be applied without alignment to obtain a more obvious signal, which may damage the precision and expensive hydrophone probe due to excessive sound intensity.

[0009] In summary, existing technologies rely on manual alignment, which has become a major bottleneck in improving the accuracy and efficiency of transducer sound field testing. Therefore, there is an urgent need in this field for a method and apparatus that can achieve rapid, accurate, and automatic alignment to overcome the aforementioned shortcomings. Utility Model Content

[0010] This invention provides a device for testing the acoustic field characteristics of an ultrasonic transducer, which solves the technical problem in the prior art where the ultrasonic transducer testing process relies on manual alignment, making it difficult to guarantee testing accuracy and efficiency.

[0011] This utility model provides an ultrasonic transducer acoustic field characteristic testing device, comprising: A support platform is provided, on which a position adjustment mechanism is installed; A base is mounted on the position adjustment mechanism, which is at least used to adjust the lateral position of the base relative to the support fixing platform; A centering clamping assembly is installed on the base, and the centering clamping assembly is used to clamp the ultrasonic transducer; A locking assembly, mounted on the base, is used to lock the centering clamping assembly in a designated position or to unlock the centering clamping assembly; A silencing water tank is located below the base, and a hydrophone is installed inside the silencing water tank; The position adjustment mechanism is adapted to move the base to adjust the centering clamping center of the centering clamping assembly to be vertically aligned with the hydrophone.

[0012] In one embodiment of this utility model, the centering clamping assembly includes a transmission rod, a clamping mechanism, and a transmission mechanism. The transmission rod is vertically inserted through the base, and multiple clamping mechanisms are evenly distributed around the axis of the transmission rod as the centering clamping center. The transmission mechanism connects the transmission rod and the clamping mechanisms. The transmission rod drives the multiple clamping mechanisms to move synchronously along the radial direction of the transmission rod to clamp or release the ultrasonic transducer. The top end of the transmission rod is connected to the locking assembly, which is used to lock or release the transmission rod.

[0013] In one embodiment of the present invention, the clamping mechanism includes a clamping block that can slide relative to the base. The clamping block is connected to a slider, and the slider is connected to the transmission rod through the transmission mechanism. Multiple clamping blocks move synchronously along the radial direction of the transmission rod under the drive of the transmission rod and the transmission mechanism to clamp or release the ultrasonic transducer.

[0014] In one embodiment of the present invention, the base is provided with a channel for the transmission rod to pass through, and the base is also provided with an opening surrounding the transmission rod and along the radial direction of the transmission rod. The number of the openings is the same as the number of the sliders. A slide rail along the radial direction of the transmission rod is provided in the opening, and the slider is slidably connected to the slide rail.

[0015] In one embodiment of the present invention, the transmission mechanism includes a connecting rod, the first end of the connecting rod is hinged to the slider, the second end of the connecting rod is hinged to the transmission rod, and the multiple connecting rods have the same length and their second ends are all hinged to the same axial position of the transmission rod, so that the transmission rod can drive the first ends of the multiple connecting rods to push the multiple sliders to move synchronously along the radial direction of the transmission rod.

[0016] In one embodiment of the present invention, the base is connected to a support seat, the support seat is used to support the locking assembly, the locking assembly includes a transmission unit and a locking unit, the input end of the transmission unit is connected to the transmission rod, the output end of the transmission unit is connected to the locking unit, and the locking unit is used to lock or release the output end of the transmission unit.

[0017] In one embodiment of the present invention, the transmission unit includes a gear and rack mechanism. The rack of the gear and rack mechanism is connected to the top of the transmission rod as the input end. The gear of the gear and rack mechanism is supported by a rotating shaft and can rotate with the rotating shaft. The rotating shaft passes through the support base and can rotate relative to the support base. The rotating shaft is connected to the locking unit as the output end of the transmission unit.

[0018] In one embodiment of the present invention, the locking unit includes a ratchet and pawl mechanism. The ratchet of the ratchet and pawl mechanism is mounted on the rotating shaft and can rotate with the rotating shaft. The pawl of the ratchet and pawl mechanism is rotatably connected to the support base, and an elastic element is connected between the pawl and the support base. The elastic element keeps the pawl engaged with the ratchet. The pawl is connected to an unlocking push block, which is used to drive the pawl to disengage from the ratchet.

[0019] In one embodiment of the present invention, the position adjustment mechanism includes an X-axis drive for adjusting the position of the base in the X-axis direction and a Y-axis drive for adjusting the position of the base in the Y-axis direction.

[0020] In one embodiment of the present invention, the ultrasonic transducer acoustic field characteristic testing device further includes an optical alignment component, which is clamped by the centering clamping assembly and can emit visible light vertically downwards, with the emission point of the visible light located at the centering clamping center of the centering clamping assembly.

[0021] The beneficial effects of this utility model are: This invention proposes an ultrasonic transducer acoustic field characteristic testing device. A support platform provides support for a position adjustment mechanism, a base, and an alignment clamping assembly. The position adjustment mechanism drives the base and the alignment clamping assembly to move laterally, adjusting their spatial position so that the center of the alignment clamping assembly is aligned with a hydrophone in a water tank. The ultrasonic transducer under test is then clamped by the alignment clamping assembly and locked by a locking component to prevent the transducer from falling off. While maintaining the spatial position of the base after alignment with the hydrophone, the ultrasonic transducer clamped by the alignment clamping assembly achieves precise coaxiality with the hydrophone's acoustic beam axis. The position adjustment mechanism can be automated through electrical control, eliminating the need for manual adjustment and avoiding errors and inefficiencies associated with manual operation. This solves the problems of low alignment accuracy and measurement deviations caused by human factors and lack of precise positioning.

[0022] This technical solution achieves precise alignment primarily through automation, making the operation simple and solving the problems of existing technologies that rely on manual alignment, are cumbersome and complex, take too long, and have low testing efficiency.

[0023] This technical solution pre-aligns the centering clamping assembly with the hydrophone, and then clamps the ultrasonic transducer under test. The centering clamping assembly's own centering characteristics ensure that the clamped ultrasonic transducer is aligned with it. In this way, the spatial position of the centering clamping assembly only needs to be adjusted once by the position adjustment mechanism, which can meet the testing needs of ultrasonic transducers of different sizes. It eliminates the need to repeatedly apply ultrasonic power for comparison and adjustment during the centering process, thus solving the risk of damage to the hydrophone caused by repeated application of ultrasonic power during the centering process. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0025] In the attached diagram: Figure 1An ultrasonic transducer acoustic field characteristic testing device is provided as an embodiment of this utility model; Figure 2 This is a bottom-view axonometric drawing of the centering clamping assembly provided in one embodiment of the present invention; Figure 3 This is a top-view axonometric view of the centering clamping assembly provided in one embodiment of the present invention.

[0026] The attached figures are labeled as follows: 1. Supporting fixed platform, 2. Three-axis drive mechanism, 3. Gear, 4. Unlocking push block, 5. Pawl, 6. Spring, 7. Support seat, 8. Ratchet, 9. Rack, 10. Connecting rod, 11. Slider, 12. Clamping block, 13. Ultrasonic transducer, 14. Hydrophone, 15. Water tank, 16. Transmission rod, 17. Base, 18. U-shaped opening, 19. Slide rail. Detailed Implementation

[0027] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0028] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0029] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0030] Please see Figure 1 , Figure 1 An ultrasonic transducer acoustic field characteristic testing device provided in one embodiment of the present invention includes: Supporting fixed platform 1, on which a position adjustment mechanism is installed; The base 17 is mounted on the position adjustment mechanism, which is at least used to adjust the lateral position of the base 17 relative to the support fixed platform 1. The centering clamping assembly is installed on the base 17 and is used to clamp the ultrasonic transducer 13. A locking assembly, mounted on the base 17, is used to lock the centering clamping assembly in a designated position or to unlock the centering clamping assembly. A silencing water tank is located below the base 17, and a hydrophone 14 is installed inside the silencing water tank; The position adjustment mechanism is adapted to move the base 17 to adjust the centering clamping center of the centering clamping assembly to be vertically aligned with the hydrophone 14.

[0031] In this embodiment, the support platform 1 provides support for the position adjustment mechanism, the base 17, and the centering clamping assembly on it. The position adjustment mechanism can drive the base 17 and the centering clamping assembly to move laterally and adjust their spatial position so that the centering clamping assembly can be aligned with the hydrophone 14 in the water tank. Then, the centering clamping assembly clamps the ultrasonic transducer 13 to be tested, and the locking assembly locks the centering clamping assembly to prevent the ultrasonic transducer 13 from falling off. While keeping the spatial position of the base 17 unchanged after alignment with the hydrophone 14, the ultrasonic transducer 13 clamped by the centering clamping assembly can achieve precise coaxiality with the hydrophone 14.

[0032] In this embodiment, the position adjustment mechanism can employ three motorized linear guides. These are existing technologies, and their specific structures are not detailed here. The three motorized linear guides are arranged along the X, Y, and Z axes. For example, the Y-axis motorized linear guide is mounted on the X-axis motorized linear guide, and the Z-axis motorized linear guide is mounted on the Y-axis motorized linear guide. The X-axis and Y-axis motorized linear guides enable position adjustment in the horizontal plane, while the Z-axis motorized linear guide enables position adjustment in the vertical plane, making the clamping of the ultrasonic transducer 13 more convenient. The motorized linear guides can be automatically controlled and their historical trajectories recorded via electrical control, eliminating the need for manual adjustment. This avoids errors caused by manual operation and the inefficiency of manual operation, solving the problems of low alignment accuracy and measurement deviations due to human factors and lack of precise positioning. Once an accurate adjustment is made, the device can be used directly without repeated alignment adjustments.

[0033] For example, in this embodiment, combined with Figure 2As shown, the centering clamping assembly includes a transmission rod 16, a clamping mechanism, and a transmission mechanism. The transmission rod 16 is vertically inserted through the base 17. Multiple clamping mechanisms are evenly distributed around the axis of the transmission rod 16 as the centering clamping center. In this embodiment, there are three clamping mechanisms, but it is worth noting that the number of clamping mechanisms is not limited to three, and can also be four or more. The transmission mechanism connects the transmission rod 16 and the clamping mechanism; the transmission rod 16 drives the three clamping mechanisms to move synchronously along the radial direction of the transmission rod 16 to clamp or release the ultrasonic transducer 13; the top end of the transmission rod 16 is connected to a locking assembly, which is used to lock or release the transmission rod 16.

[0034] In this embodiment, the transmission rod 16 serves as the central transmission component of the centering clamping assembly. The axis of the transmission rod 16 is the clamping center axis of the centering clamping assembly. The three clamping mechanisms are centered on it and clamped under the drive of the transmission mechanism, ensuring that the acoustic beam axis of the clamped ultrasonic transducer 13 coincides with the clamping center axis of the centering clamping assembly. Thus, without further adjustment of the base 17 position, the acoustic beam axis of the clamped ultrasonic transducer 13 is coaxial with the hydrophone 14. The locking assembly keeps the clamping mechanism in a clamping state of the ultrasonic transducer 13 by locking the transmission rod 16, and releasing the transmission rod 16 releases the clamping mechanism from the ultrasonic transducer 13.

[0035] For example, in this embodiment, the clamping mechanism includes a clamping block 12 that can slide relative to the base 17. The clamping block 12 is connected to a slider 11. In this embodiment, the clamping block 12 and the slider 11 are preferably integrally formed, but bolt connection or other methods can also be used. The slider 11 is connected to the transmission rod 16 through a transmission mechanism. The three clamping blocks 12 move synchronously along the radial direction of the transmission rod 16 under the drive of the transmission rod 16 and the transmission mechanism to clamp or release the ultrasonic transducer 13.

[0036] In this embodiment, the clamping block 12 serves as the actuator for clamping the ultrasonic transducer 13. The clamping block 12 is slidably connected to the base 17 via the slider 11, that is, the base 17 indirectly provides support for the clamping block 12. The transmission rod 16 and the transmission mechanism provide power for the movement of the clamping block 12. This structure is simple, but the driving of the clamping block 12 is stable and reliable.

[0037] For example, in this embodiment, the base 17 is provided with a channel for the transmission rod 16 to pass through. In this embodiment, the channel is a circular through hole. The base 17 is also provided with an opening that surrounds the transmission rod 16 and is radially along the transmission rod 16. In this embodiment, the opening is a U-shaped opening 18 that communicates with the circular through hole. The number of openings is the same as the number of sliders 11, which is three. That is, a slider 11 slides in each opening. A slide rail 19 is provided in the opening along the radial direction of the transmission rod 16. The slider 11 is slidably connected to the slide rail 19. In this embodiment, preferably, the slider 11 is sleeved on the slide rail 19.

[0038] In this embodiment, the channel allows the transmission rod 16 to link both sides of the base 17, which facilitates the contact and transmission between the transmission rod 16 and the ultrasonic transducer 13, and also separates the structure above the base 17 from the clamping operation space of the ultrasonic transducer 13. The U-shaped opening 18 facilitates the installation of the slider 11, while the slide rail 19 provides stable support and reliable guidance for the movement of the slider 11.

[0039] For example, in this embodiment, the transmission mechanism includes a connecting rod 10. Preferably, the connecting rod 10 is a rigid member. The first end of the connecting rod 10 is hinged to the slider 11, and the second end of the connecting rod 10 is hinged to the transmission rod 16. The three connecting rods 10 have the same length and their second ends are all hinged to the same axial position of the transmission rod 16, so that the transmission rod 16 can drive the first ends of the three connecting rods 10 to push the three sliders 11 to move synchronously along the radial direction of the transmission rod 16.

[0040] In this embodiment, a rigid connecting rod 10 is used as the transmission mechanism. The structure is simple, and the driving response of the slider 11 is timely and the positioning is accurate. The two ends of the connecting rod 10 are hinged to ensure that the vertical movement of the transmission rod 16 is converted into the lateral movement of the slider 11. The position setting of the second end of the three connecting rods 10 ensures that the three sliders 11 and the clamping blocks 12 are driven to move synchronously toward or apart toward the axis of the transmission rod 16, ensuring that the clamping center of the three clamping blocks 12 is precisely aligned with the axis of the transmission rod 16.

[0041] For example, in this embodiment, such as Figure 3 As shown, the base 17 is connected to the support seat 7. In this embodiment, the support seat 7 is preferably bolted to the base 17, but it can also be integrally formed on the base 17 or bonded to the base 17. The support seat 7 is used to support the locking assembly. The locking assembly includes a transmission unit and a locking unit. The input end of the transmission unit is connected to the transmission rod 16, and the output end of the transmission unit is connected to the locking unit. The locking unit is used to lock or release the output end of the transmission unit.

[0042] In this embodiment, the locking assembly is supported by the support base 7, and the movement of the transmission rod 16 is transmitted to the transmission unit. The locking unit locks the transmission rod 16 in a specified position by locking the transmission unit.

[0043] For example, in this embodiment, the transmission unit includes a gear 3 and rack 9 mechanism. The rack 9 of the gear 3 and rack 9 mechanism serves as the input end and is bolted to the top of the transmission rod 16. The gear 3 of the gear 3 and rack 9 mechanism is supported by a rotating shaft and can rotate with the rotating shaft. In this embodiment, the gear 3 is preferably keyed to the rotating shaft. The rotating shaft passes through the support base 7 and can rotate relative to the support base 7. In this embodiment, the rotating shaft and the support base 7 are preferably supported by a bearing. The rotating shaft serves as the output end of the transmission unit and is connected to the locking unit.

[0044] In this embodiment, the vertical movement of the transmission rod 16 can be converted into the rotation of the gear 3 by the gear 3 and rack 9, and then into the rotation of the shaft. The linear displacement is converted into rotational torque, reducing the space required for motion transmission and minimizing space occupation.

[0045] For example, the locking unit includes a ratchet 8 and a pawl 5 mechanism. The ratchet 8 of the ratchet 8 and pawl 5 mechanism is mounted on a rotating shaft and can rotate with the rotating shaft. In this embodiment, the ratchet 8 is preferably keyed to the rotating shaft. The pawl 5 of the ratchet 8 and pawl 5 mechanism is rotatably connected to a support base 7. In this embodiment, the pawl 5 is preferably connected to the support base 7 by a pin, and an elastic element is connected between the pawl 5 and the support base 7. The elastic element keeps the pawl 5 engaged with the ratchet 8. In this embodiment, the elastic element is preferably a spring 6, and the two ends of the spring 6 are hooked to the pawl 5 and the support base 7, respectively. The pawl 5 is connected to an unlocking push block 4. In this embodiment, the unlocking push block 4 is preferably integrally formed with the pawl 5, but it can also be welded, glued, or screwed together. The unlocking push block 4 is used to drive the pawl 5 to disengage from the ratchet 8.

[0046] In this embodiment, based on the conversion of the linear displacement of the transmission rod 16 into the rotational torque of the shaft, the ratchet 8 and pawl 5 mechanism can achieve simple, stable, and reliable one-way locking, thereby effectively locking the transmission rod 16 and ensuring that the clamping block 12 maintains its clamping of the ultrasonic transducer 13. The unlocking push block 4 can easily disengage the pawl 5 from the ratchet 8 by overcoming the elastic element, thereby releasing the lock on the shaft. Subsequently, the rack 9 and transmission rod 16 can move downward under their own gravity, causing the clamping block 12 to loosen its grip on the ultrasonic transducer 13. This structure is simple and operates stably and reliably.

[0047] For example, in this embodiment, the locking unit can also be an electrically driven, gas-driven, or liquid-driven structure, or other structures controlled by automation.

[0048] For example, in this embodiment, the position adjustment mechanism includes an X-axis drive for adjusting the position of the base 17 in the X-axis direction and a Y-axis drive for adjusting the position of the base 17 in the Y-axis direction.

[0049] In this embodiment, the X-axis drive can drive the Y-axis drive to move along the X-axis, and the Y-axis drive can drive the base 17 to move along the Y-axis; alternatively, the Y-axis drive can drive the X-axis drive to move along the Y-axis, and the X-axis drive can drive the base 17 to move along the X-axis. Similarly, if a Z-axis drive is needed, any combination of the X-axis drive, Y-axis drive, and Z-axis drive can be used to drive the base 17, thereby achieving three-dimensional spatial position adjustment of the base 17.

[0050] For example, in this embodiment, the ultrasonic transducer 13 sound field characteristic testing device further includes an optical alignment member, which is clamped by an alignment clamping assembly and can emit visible light vertically downward, and the emission point of the visible light is located at the alignment clamping center of the alignment clamping assembly.

[0051] In this embodiment, the optical alignment component is preferably a cylindrical infrared emitter, with its emission point located on the central axis of the cylinder. Thus, the visible light emitted by the optical alignment component, held by the centering clamping assembly, is collinear with the centering clamping center. After the optical alignment component is aligned with the hydrophone 14 via the position adjustment mechanism, the centering clamping center of the centering clamping assembly is vertically aligned with the hydrophone 14. Consequently, the ultrasonic transducer 13 under test, which is then clamped, can automatically achieve precise alignment of its acoustic beam axis with the hydrophone 14.

[0052] This utility model's technical solution uses infrared light as a positioning reference. A high-precision electric linear guide rail adjusts the position of the clamp, ensuring that the axis of the hydrophone 14 coincides with the transducer's acoustic beam axis (i.e., the infrared light), achieving an alignment accuracy within 0.1mm. The specific implementation includes the following steps: Reference establishment: The infrared emitter is clamped by the centering clamping assembly and fixed along the central axis of the transmission rod 16. The infrared rays emitted by the emitter are coaxial with the axis of the transmission rod 16. This infrared ray is the reference line of the transducer beam axis.

[0053] Position Adjustment: The electric linear guide rail of the position adjustment mechanism 2 on the support platform 1 can drive the base 17 and the entire clamping mechanism to move in the X, Y, and Z directions. By adjusting the position adjustment mechanism 2 through the control system, the infrared light emitted by the infrared transmitter is automatically aligned with the center of the tip of the hydrophone 14 according to the center coordinate position of the tip (the tip of the hydrophone 14 is the detection reference point). The center position coordinates of the tip of the hydrophone 14 are preset in the control system of the position adjustment mechanism 2.

[0054] Fixing and testing: After alignment, the position adjustment mechanism 2 is locked in place. At this time, the centering clamping center of the centering assembly is vertically collinear with the center of the hydrophone 14, and sound field characteristic testing and other work can be performed.

[0055] When using the technical solution of this embodiment to test the acoustic field characteristics of the ultrasonic transducer 13, the centering and clamping operation of the ultrasonic transducer 13 is as follows: Transducer placement and initial transmission: Place the cylindrical ultrasonic transducer 13 to be tested with a diameter of 10-200mm (the axis of the cylindrical transducer is the sound beam axis) into the three clamping blocks 12 and attach it to the lower end of the transmission rod 16, and push the ultrasonic transducer 13 to be tested upward so that the transmission rod 16 moves upward along the central axis of the base 17.

[0056] Clamping action: The upper end of the transmission rod 16 is connected to the connecting rod 10 through the hinge shaft. Its upward movement drives the connecting rod 10 to move, which in turn pushes the slider 11 to move radially synchronously along the guide rail inside the U-shaped opening 18 of the base 17 (the slider 11 moves an equal distance). Finally, it drives the clamping block 12 to retract towards the ultrasonic transducer 13 under test, realizing automatic centering and clamping. This makes the acoustic beam axis of the ultrasonic transducer 13 under test precisely aligned with the hydrophone 14, thus enabling the detection of acoustic field characteristics.

[0057] Automatic locking: As the transmission rod 16 moves upward, the rack 9 fixed at its top moves upward synchronously, driving the gear 3 to rotate clockwise (the rotational speed is proportional to the speed of the transmission rod 16); since the gear 3 and the ratchet 8 are rigidly connected through the same shaft, the ratchet 8 rotates synchronously with the gear 3. At this time, the pawl 5 engages with the tooth surface of the ratchet 8 under the action of the spring 6, restricting the ratchet 8 from rotating counterclockwise, thereby locking the positions of the transmission rod 16, the connecting rod 10, and the clamping block 12, achieving "stop at any time, lock instantly".

[0058] One-button release: When the ultrasonic transducer 13 needs to be removed, push the unlocking push block 4. The unlocking push block 4 drives the pawl 5 to overcome the elastic force of the spring 6, so that the pawl 5 disengages from the tooth groove of the ratchet 8. At this time, the ratchet 8 can rotate freely counterclockwise. The transmission rod 16 returns to its original position under the gravity of the ultrasonic transducer 13 and the clamping part, which drives the connecting rod 10 to retract and the clamping block 12 to loosen radially. The ultrasonic transducer 13 automatically falls to complete the release.

[0059] Reset guarantee: After release, release the unlocking push block 4, the spring 6 pushes the pawl 5 to reset, and re-engage with the ratchet 8, waiting for the next clamping cycle.

[0060] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A device for testing the acoustic field characteristics of an ultrasonic transducer, characterized in that, include: A support platform is provided, on which a position adjustment mechanism is installed; A base is mounted on the position adjustment mechanism, which is at least used to adjust the lateral position of the base relative to the support fixing platform; A centering clamping assembly is installed on the base, and the centering clamping assembly is used to clamp the ultrasonic transducer; A locking assembly, mounted on the base, is used to lock the centering clamping assembly in a designated position or to unlock the centering clamping assembly; A silencing water tank is located below the base, and a hydrophone is installed inside the silencing water tank; The position adjustment mechanism is adapted to move the base to adjust the centering clamping center of the centering clamping assembly to be vertically aligned with the hydrophone.

2. The ultrasonic transducer acoustic field characteristic testing device according to claim 1, characterized in that: The centering clamping assembly includes a transmission rod, a clamping mechanism, and a transmission mechanism. The transmission rod is vertically inserted through the base. Multiple clamping mechanisms are evenly distributed around the axis of the transmission rod as the centering clamping center. The transmission mechanism connects the transmission rod and the clamping mechanisms. The transmission rod drives the multiple clamping mechanisms to move synchronously along the radial direction of the transmission rod to clamp or release the ultrasonic transducer. The top end of the transmission rod is connected to the locking assembly, which is used to lock or release the transmission rod.

3. The ultrasonic transducer acoustic field characteristic testing device according to claim 2, characterized in that: The clamping mechanism includes a clamping block that can slide relative to the base. The clamping block is connected to a slider, which is connected to the transmission rod via the transmission mechanism. Multiple clamping blocks move synchronously along the radial direction of the transmission rod under the drive of the transmission rod and the transmission mechanism to clamp or release the ultrasonic transducer.

4. The ultrasonic transducer acoustic field characteristic testing device according to claim 3, characterized in that: The base is provided with a channel for the transmission rod to pass through, and the base is also provided with an opening surrounding the transmission rod and along the radial direction of the transmission rod. The number of openings is the same as the number of sliders. A slide rail along the radial direction of the transmission rod is provided in the opening, and the slider is slidably connected to the slide rail.

5. The ultrasonic transducer acoustic field characteristic testing device according to claim 4, characterized in that: The transmission mechanism includes connecting rods, with a first end of the connecting rod hinged to the slider and a second end of the connecting rod hinged to the transmission rod. The multiple connecting rods have the same length and their second ends are all hinged to the same axial position of the transmission rod, so that the transmission rod can drive the first ends of the multiple connecting rods to push the multiple sliders to move synchronously along the radial direction of the transmission rod.

6. The ultrasonic transducer acoustic field characteristic testing device according to claim 5, characterized in that: The base is connected to a support seat, which supports the locking assembly. The locking assembly includes a transmission unit and a locking unit. The input end of the transmission unit is connected to the transmission rod, and the output end of the transmission unit is connected to the locking unit. The locking unit is used to lock or release the output end of the transmission unit.

7. The ultrasonic transducer acoustic field characteristic testing device according to claim 6, characterized in that: The transmission unit includes a gear and rack mechanism. The rack of the gear and rack mechanism is connected to the top of the transmission rod as the input end. The gear of the gear and rack mechanism is supported by a rotating shaft and can rotate with the rotating shaft. The rotating shaft passes through the support base and can rotate relative to the support base. The rotating shaft is connected to the locking unit as the output end of the transmission unit.

8. The ultrasonic transducer acoustic field characteristic testing device according to claim 7, characterized in that: The locking unit includes a ratchet and pawl mechanism. The ratchet of the ratchet and pawl mechanism is mounted on the rotating shaft and can rotate with the rotating shaft. The pawl of the ratchet and pawl mechanism is rotatably connected to the support base, and an elastic element is connected between the pawl and the support base. The elastic element keeps the pawl engaged with the ratchet. The pawl is connected to an unlocking push block, which is used to drive the pawl to disengage from the ratchet.

9. The ultrasonic transducer acoustic field characteristic testing device according to claim 1, characterized in that: The position adjustment mechanism includes an X-axis drive for adjusting the position of the base in the X-axis direction and a Y-axis drive for adjusting the position of the base in the Y-axis direction.

10. The ultrasonic transducer acoustic field characteristic testing device according to claim 1, characterized in that: The ultrasonic transducer acoustic field characteristic testing device also includes an optical alignment component, which is clamped by the centering clamping assembly and can emit visible light vertically downwards, with the emission point of the visible light located at the centering clamping center of the centering clamping assembly.

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