Automatic testing method for acoustic performance of transducer

Abstract

The invention discloses an automatic testing method for acoustic performance of a transducer, and aims to solve the problems of tedious operation, large error and the like of the traditional testing. According to the method, a transducer is fixed through a profiling clamp, and a soft lining of the transducer adapts to shell deformation and is positioned at a central symmetry position; after parameter configuration multiplexing and test mode selection, acoustic alignment is realized through a three-axis moving mechanism and an angle adjusting assembly, and equidistance between a key array element and a target reflecting surface is ensured; in a fixed or non-fixed target material mode, a triaxial test platform drives a probe to automatically traverse array elements, and excitation signal output and echo signal acquisition are synchronously completed; after acoustic parameters are measured through signal processing, a test report is automatically generated. According to the invention, a multi-structure synergistic effect is fused, full-process automation is realized, operation is simplified, test efficiency and precision are improved, and the transducer acoustic detection device adapts to transducers of different models and is suitable for transducer acoustic detection in the field of medical imaging equipment.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and in particular to an automatic testing method for the acoustic performance of transducers. Background Technology

[0002] In the field of medical imaging equipment, transducers (also known as probes) are the core components for achieving acoustic imaging, and their acoustic performance directly affects image quality. Transducers are typically composed of multiple array elements, which are the basic units for achieving electroacoustic conversion. Multiple array elements are arranged in a specific pattern to form an array for transmitting and receiving ultrasonic signals.

[0003] In a conventional transducer acoustic testing system, the transducer is clamped onto a triaxial mechanism in a test tank using a universal clamp, and the test target is placed inside the tank. Since there is no fixed positional relationship between the transducer and the target, each transducer requires adjustment in six dimensions during testing: axial movement along the X, Y, and Z axes, and radial oscillation. After adjustment, manual testing is required, contacting each element pin of the transducer's matching box connector sequentially. If the transducer lacks a matching target, the target must be rotated and oscillated around the transducer's test center. For each element angle oscillation, the operator must simultaneously test the corresponding pin of the matching box connector.

[0004] However, the aforementioned conventional testing systems have many shortcomings and problems in practical applications, as follows: 1. The transducers have different shapes and are mostly arc-shaped structures. After clamping, they have a large degree of freedom in each direction, which results in the position and angle of the transducer relative to the target scanning plane being inconsistent after each clamping. This requires repeated adjustments in 6 dimensions, which is cumbersome and inefficient. 2. The target material cannot be repeatedly fixed and installed in the water tank. The position of the transducer clamping triaxial mechanism needs to be readjusted for each test to adapt to the target material, which further increases the workload of adjustment. 3. The pins of the matching box plug need to be manually touched and tested one by one in a specific order. This requires a high level of skill and accurate memory from the operator, and it is easy to miss elements or make mistakes in the order of testing. 4. The original mobile target was suspended in the water tank, and due to gravity, it was tilted at an angle, which increased the difficulty of adjusting the transducer's orientation. During the test, the operator needed to rotate the target with his left hand, touch the pin with his right hand, and control the test with his foot. The operation required high coordination of multiple actions, which made the operation complex and prone to errors. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic testing method for the acoustic performance of transducers, which is applicable to transducer acoustic testing scenarios.

[0006] To achieve the above objectives, the present invention provides an automatic testing method for the acoustic performance of a transducer, comprising the following steps: (S1) Fix the transducer with a clamp; (S2) Configure and reuse parameters and select test mode: Input the corresponding test parameter information according to the model of the transducer under test and save it automatically. When testing the same model of transducer later, the saved parameters can be directly called. At the same time, based on whether the transducer is equipped with a matching target, select the fixed target test mode or the non-fixed target test mode. (S3) Perform acoustic alignment: Adjust the relative position of the transducer and the target material through the three-axis moving mechanism and angle adjustment component to make the distance between the key array element of the transducer and the reflective surface of the target material consistent, and complete the alignment adjustment. (S4) Start the automated testing program to perform automatic traversal testing of array elements, where, If it is a fixed target test mode: the triaxial test platform controls the test probe to move point by point according to the arrangement of transducer array elements, and contacts all array element lead-out contacts in sequence. Simultaneously, the pulse generator outputs the excitation signal and the oscilloscope collects the echo electrical signal after being reflected by the target. If it is a non-fixed target test mode: the test probe is controlled by the triaxial test platform to move point by point, and the target is adapted to the test progress of the array element to keep the target and the current test array element always in acoustic alignment. Simultaneously, the excitation signal is output through the pulse generator and the echo electrical signal after being reflected by the target is collected by the oscilloscope. (S5) Perform conversion analysis on the collected echo electrical signals and calculate the acoustic performance parameters; (S6) Automatically save test data and generate test reports.

[0007] Preferably, the contact surface of the clamp in step (S1) is a soft inner liner. The soft inner liner has a contour structure that matches the shape of the transducer and can limit the clamping freedom of the transducer by contour fitting.

[0008] Preferably, the transducer is positioned on the center symmetry line within the fixture.

[0009] Preferably, the "parameter configuration and reuse" in step (S2) specifically includes: when testing a certain model of transducer for the first time, manually input or import the exclusive test parameters corresponding to that model of transducer through the system, and the system stores the parameters after binding them with the transducer model; when testing the same model of transducer in subsequent tests, only the transducer model needs to be input, and the system will automatically match and call the stored exclusive test parameters without the need for manual reconfiguration.

[0010] Preferably, in step (S2), “selecting the test mode based on whether the transducer is equipped with a matching target” specifically includes: if the transducer comes with a matching target, then the fixed target test mode is selected; If there is no suitable target for the transducer, and different array elements need to be tested by adapting the target displacement, then the non-fixed target test mode should be selected.

[0011] Preferably, the acoustic alignment in step (S3) is achieved through multi-dimensional adjustment, which includes translational adjustment along the three orthogonal directions X, Y, and Z, as well as angular adjustment around the X, Y, and Z axes, to compensate for transducer clamping and target installation deviations, so that the distance from the key array element of the transducer to the reflective surface of the target is consistent.

[0012] Preferably, the criteria for determining the alignment adjustment in step (S3) are: the distances from the center element, the first element, and the final element of the transducer to the reflective surface of the target material are all the same, and the maximum amplitude of the first echo is used as the sign that the adjustment is complete.

[0013] Preferably, in the fixed target testing mode of step (S4), the target is fixed in the test water tank by a positioning structure. The test water tank restricts the installation freedom of the target by a positioning adaptation relationship, so that the target is in the same fixed position each time it is installed, and the relative position of the transducer and the target is repeatable.

[0014] Preferably, in the fixed target test mode of step (S4), the distance between the reflective surface of the target and each element of the transducer is consistent, and the contour shape of the reflective surface matches the emission angle of the transducer array.

[0015] Preferably, in the non-fixed target testing mode of step (S4), the displacement method aims at the acoustic alignment of the current test element with the target. The target material adaptation displacement is as follows: the target material is driven by a synchronous drive mechanism. After each array element test is completed, the target material swings at a preset angle to achieve relative displacement with the transducer array element.

[0016] The beneficial effects of this invention are: 1. This invention employs a contour-following fixture that perfectly matches the transducer's shape, along with a target positioning groove at the bottom of the test tank, ensuring that the transducer's center position is essentially aligned with the target's center position after clamping. The soft contact layer of the contour-following fixture can adapt to minor deformations of the transducer's outer shell, guaranteeing consistency in each clamping. This simplifies the traditional six-dimensional adjustment to only requiring fine-tuning in the X and Z directions within a plane, significantly reducing operational complexity and improving clamping efficiency.

[0017] 2. The triaxial testing mechanism of this invention uses a program to control the test probes to test the transducer array element pins point by point in a preset order, replacing manual poking operations. This not only eliminates the risks of memory errors and sequence errors inherent in manual operation, but also avoids oscilloscope reading deviations caused by inconsistent manual contact times through precise control of probe contact time, resulting in more accurate and consistent measurement results with a smaller error range. Simultaneously, the operator can perform other tasks during the testing process, reducing machine uptime and improving overall work efficiency.

[0018] 3. This invention achieves the binding and storage of test parameters with transducer models through the linkage between the host computer and the triaxial testing mechanism. The initial configured test parameters can be directly recalled for subsequent tests of the same model of transducer, eliminating the need for repeated input. This function effectively shortens test preparation time while ensuring a high degree of consistency in test conditions for transducers of the same model, effectively reducing the impact of parameter errors on test results, and providing a reliable guarantee for batch quality inspection of transducers.

[0019] 4. The dual-mode automatic traversal test design of this invention can flexibly adapt to transducers with different target configurations. In the fixed target mode, the precise cooperation between the detachable bracket and the positioning groove of the test water tank ensures test stability. In the non-fixed target mode, a target displacement method is provided. The target displacement is solved by the synchronous drive mechanism, linear motion module and the guide and limiting structure of ball bearings and arc grooves, which solves the tilting problem of traditional suspended target. The target rotation is achieved by the linkage between the rotating shaft and the synchronous drive mechanism, which coordinates with the probe test. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0021] Figure 1 This is a flowchart of the testing method of the present invention.

[0022] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 3 This is a schematic diagram of the contouring fixture of the present invention.

[0024] Figure 4 This is a schematic diagram of the transducer clamping of the present invention.

[0025] Figure 5 This is a schematic diagram of the three-axis moving mechanism of the present invention.

[0026] Figure 6 This is a schematic diagram of the positioning structure of the present invention.

[0027] Figure 7 This is a schematic diagram of the moving target mechanism of the present invention.

[0028] Figure 8 This is a schematic diagram of the target material adaptability displacement of the present invention.

[0029] Figure 9 This is a schematic diagram of the structure of the triaxial testing platform of the present invention.

[0030] Figure 10 This is a schematic diagram of the 156-pin connector of the present invention.

[0031] Figure 11 This is a schematic diagram of the Tyco plug interface of the present invention.

[0032] In the diagram: 1. Test water tank; 11. Arc-shaped groove; 21. Fixture; 211. Soft liner; 22. Transducer mounting base; 23. Rotary shaft; 231. Groove; 24. XY angle adjuster; 25. Rotary shaft sleeve; 31. Target material; 32. Target material support; 33. Positioning groove; 34. Target material fixing seat; 35. Synchronous drive mechanism; 36. Linear motion module; 37. Ball bearing; 5. Three-axis moving mechanism; 6. Three-axis test platform; 7. Oscilloscope; 8. Pulse generator; 9. Host computer. Detailed Implementation

[0033] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0034] like Figures 1-2 As shown, the automatic testing method for the acoustic performance of a transducer provided in this embodiment includes the following steps: (S1) Transducer fixing: The transducer is fixed by a contour jig that is precisely adapted to the shape of the transducer. The contour of the jig and the soft inner liner work together to limit the degree of freedom of the transducer clamping, ensure the consistency of positioning, and lay the foundation for subsequent testing. (S2) Parameter configuration and reuse and test mode selection: The input, storage and retrieval of test parameters are realized through the host computer. The exclusive parameters configured for the first time are bound to the transducer model and can be directly reused when testing the same model of transducer in the future. At the same time, depending on whether the transducer is equipped with a matching target, the fixed target test mode or the non-fixed target test mode can be flexibly selected to adapt to different test scenarios. (S3) Acoustic alignment: Through the coordinated adjustment of the three-axis moving mechanism and the angle adjustment component, the relative position calibration of the transducer and the target material is achieved, ensuring that the distance from the key array element of the transducer to the reflective surface of the target material is consistent, ensuring the uniformity of the test benchmark, and completing the alignment adjustment; (S4) Automatic Array Element Traversal Test: Start the automated test program to simultaneously complete the excitation signal output and echo signal acquisition, wherein, If it is a fixed target test mode: the triaxial test platform controls the test probe to move point by point according to the arrangement of transducer array elements, and contacts all array element lead-out contacts in sequence. Simultaneously, the pulse generator outputs the excitation signal and the oscilloscope collects the echo electrical signal after being reflected by the target. If it is a non-fixed target test mode: the test probe is controlled by the triaxial test platform to move point by point, and the target is adapted to the test progress of the array element to keep the target and the current test array element always in acoustic alignment. Simultaneously, the excitation signal is output through the pulse generator and the echo electrical signal after being reflected by the target is collected by the oscilloscope. (S5) Acoustic parameter calculation: The collected echo electrical signal is processed in multiple dimensions, such as Fourier transform and waveform feature extraction, to automatically calculate the acoustic performance parameters of the transducer. (S6) Data storage and report generation: The system automatically associates and stores test data, waveform information and configuration parameters to generate a standardized test report containing the pass / fail judgment results, and supports data traceability and export.

[0035] Understandably, this invention achieves precise transducer fixation through a contour-following fixture, reduces repetitive configuration work by combining parameter reuse, adapts to transducers with different target configurations through dual-mode testing, ensures consistency of test benchmarks through multi-dimensional acoustic alignment, and finally replaces manual operation through automated traversal testing. The entire method deeply integrates the synergistic effects of core structures such as the contour-following fixture, three-axis movement mechanism, dual-mode target assembly, and three-axis testing platform, providing a relative displacement method for target movement in non-fixed target mode, effectively solving problems such as cumbersome operation, large errors, and poor adaptability in traditional testing, and significantly improving testing efficiency and result reliability.

[0036] like Figure 3 As shown, the contact surface of the clamp 21 is a soft inner liner 211. The soft inner liner 211 has a contour structure that matches the shape of the transducer. The contour fit restricts the clamping freedom of the transducer, while keeping the transducer at the center symmetry line position within the clamp 21.

[0037] In one embodiment, the clamp 21 adopts a composite structure of an outer frame and a soft inner liner 211. The outer frame is made of high-strength materials such as ABS engineering plastic to ensure structural rigidity and dimensional accuracy, and to prevent clamping deviation caused by deformation of the clamp 21. The soft inner liner 211 is made of soft rubber through a potting process. Its surface contour perfectly matches the transducer shell. Unlike traditional planar soft inner liners that only serve a protective function, the contour structure of the present invention can tightly fit the transducer shell through elastic deformation, automatically calibrating and fixing the transducer at the position of the central symmetry line, thereby restricting the X and Y translational and Z-axis rotational freedom of the transducer in the clamp 21, and preventing loosening or displacement after clamping.

[0038] The fixture 21 is integrally and fixedly connected to the mounting base 22 of the transducer clamping mechanism. The mounting base 22 is fitted with a rotating shaft sleeve 25 and a rotating shaft 23, providing a structural basis for subsequent angle adjustment. The soft inner lining 211 can be made of materials such as silicone rubber and nitrile rubber with good elasticity and water resistance, ensuring that while adapting to the slight deformation of different transducer housings, it avoids scratching and damaging the transducer housing.

[0039] In one embodiment, as Figure 4 shown, the fixture 21 is fixedly connected to the transducer mounting base 22. The mounting base 22 is fixedly connected to the rotating shaft sleeve 25. The rotating shaft sleeve 25 is sleeved outside the rotating shaft 23 and fixed on the three-axis moving mechanism 5. An X-Y angle adjuster 24 is installed below the rotating shaft 23. Through this X-Y angle adjuster 24, the angle fine adjustment after the transducer is clamped can be realized, further ensuring the relative position accuracy between the transducer array elements and the reflecting surface of the target 31.

[0040] Furthermore, a circular groove penetrating up and down is provided on the rotating shaft 23. This circular groove cooperates with the flange inside the rotating shaft sleeve 25 to achieve the horizontal positioning of the transducer mounting base 22 in the X direction. There are also two grooves 231 with different widths on the rotating shaft 23. The width of the small-size groove 231 is smaller than the length of the flange inside the sleeve, which is used for tightening and locking in the Z-axis direction during horizontal installation. The width of the large-size groove 231 is larger than the length of the flange inside the sleeve. When it is necessary to rotate and adjust along the Z axis, loosen the locking screw on the sleeve, move the rotating shaft 23 up and down along the Z axis to align the large-size groove 231 with the flange, and then the rotation of the rotating shaft 23 in the Z-axis direction can be realized. After adjusting to the appropriate angle, lock it with a set screw, so as to accurately control the rotation angle of the transducer and meet the angle adaptation requirements in different test scenarios.

[0041] When testing different models of transducers, only need to replace the fixture 21 with the corresponding profiling contour, and the quick fixation between the fixture 21 and the mounting base 22 can be realized. Through this clamping method, the center position of the transducer and the center position of the target 31 can be basically aligned, simplifying the cumbersome six-dimensional adjustment in traditional tests to only the X and Z-direction fine adjustments in the plane, greatly reducing the operation complexity and improving the clamping speed and positioning consistency.

[0042] [[ID=1!4]]To reduce repeated operations and ensure the consistency of test conditions, the present invention also includes a configuration reuse system that binds test parameters to transducer models, and the specific implementation is as follows: This configuration reuse system is realized through the host computer 9 of the three-axis test mechanism, and forms a linkage control with the three-axis test platform 6, the oscilloscope 7, and the pulse generator 8. The test parameters cover core parameters such as the number of transducer array elements, the array element arrangement pitch, the target adaptation parameters (fixed target installation height, moving target swing angle step size), the probe moving path parameters, the signal acquisition duration, and the excitation signal intensity.

[0043] When testing a specific transducer model for the first time, the operator can manually input parameters through the host computer interface (9). The system then binds the parameters to the transducer model and stores them in the local database, forming a unique test configuration file. Subsequent tests of the same transducer model only require inputting the transducer model into the host computer interface (9). The system can automatically match and call the stored configuration file, quickly completing the probe path preset for the triaxial test platform (6), the excitation signal parameter settings for the pulse generator (8), and the acquisition parameter configuration for the oscilloscope (7). This eliminates the need for repeated manual input, significantly reducing test preparation time.

[0044] For different scenarios involving whether or not the transducer is equipped with a matching target (including testing brand-new transducers), this invention designs two testing modes: fixed target and non-fixed target. These modes can be manually selected via the host computer interface or automatically determined by the system. (1) Fixed target test mode, applicable to transducers with their own dedicated target 31, and ensures the repeatability and stability of target 31 installation through standardized positioning structure.

[0045] In one embodiment, such as Figure 6 As shown, the positioning structure includes a target support 32 and a positioning groove 33 located at the bottom of the test water tank 1. The shape of the positioning groove 33 is precisely matched with the contour of the base of the target support 32, and the installation freedom of the target support 32 is restricted by the interlocking relationship between the protrusion and the groove.

[0046] During installation, insert one end of the detachable target bracket 32 ​​into the positioning groove 33 and fix the other end to the target 31 so that the reflective surface of the target 31 faces the transducer clamp 21. When the transducer requires a deeper test depth, the target bracket 32 ​​can be removed and the target 31 can be directly installed in the slot at the bottom of the test water tank 1 to further expand the test adaptation range.

[0047] In one embodiment, the reflective surface of the target 31 is designed as an adapter surface that matches the distance between each element of the transducer, and its contour shape is an arc surface that matches the emission angle of the transducer array. This ensures that the ultrasonic signal emitted by the transducer is concentrated and fed back to the receiving element after reflection, avoiding signal dispersion and improving the accuracy of echo signal acquisition.

[0048] (2) Non-fixed target test mode, which is suitable for transducers without a matching special target 31, provides a target displacement method. It is linked with the triaxial test platform 6 through the synchronous drive mechanism 35 to replace manual collaborative operation and ensure test synchronization and accuracy.

[0049] In one embodiment, such as Figures 7-8As shown, the specific structure of the target material adaptability displacement includes a target material fixing seat 34, a synchronous drive mechanism 35, a linear motion module 36, and a guide and limiting structure. The synchronous drive mechanism 35 consists of a synchronous wheel motor and a target material swing transmission assembly. The synchronous wheel motor is installed on the test water tank 1 and drives the target material swing transmission assembly through a synchronous belt, transmitting power to the linear motion module 36. The target material fixing seat 34 is connected to the linear motion module 36 and can perform linear reciprocating motion along the linear motion module 36. In conjunction with the swing drive of the synchronous drive mechanism 35, the target material 31 can swing according to the corresponding radius of rotation, adapting to the testing requirements of transducers with different array element arrangements. A ball bearing 37 is installed at the end of the target material 31. The test water tank 1 has a corresponding arc-shaped groove 11. The ball bearing 37 is embedded in the arc-shaped groove 11 to form a guide and limiting structure, completely solving the tilting problem caused by gravity of traditional suspended targets. After each array element test is completed, the target material 31 swings at a preset angle to achieve acoustic alignment with the next array element.

[0050] Furthermore, such as Figures 4-5 As shown, the present invention integrates a multi-dimensional alignment system that combines translation and angle adjustment. It is composed of a three-axis moving mechanism 5 and an angle adjustment component, which can compensate for clamping and installation deviations in all aspects and improve the reliability of test data.

[0051] The three-axis moving mechanism 5 is fixed above the test water tank 1 and can drive the transducer clamping mechanism to translate and adjust along the three orthogonal directions of X, Y, and Z to compensate for the spatial position deviation between the transducer and the target material 31. The angle adjustment component adopts the XY angle adjuster 24, which is installed below the rotating shaft 23. By rotating the adjustment knob, the angle of the transducer around the X and Y axes can be finely adjusted. With the structure of the rotating shaft 23 and the rotating shaft sleeve 25, by loosening the locking screw of the rotating shaft sleeve 25 and moving the rotating shaft 23 up and down along the Z axis to align the large-size groove 231 with the flange, the rotation adjustment around the Z axis can be realized, forming a six-dimensional adjustment capability.

[0052] When the distance values ​​of the three types of array elements tend to be consistent, and the first echo amplitude on the host computer 9 reaches the maximum value, the control system automatically locks the current state of the three-axis moving mechanism 5 and the angle adjustment component, determines that the alignment is complete, and ensures that the transducer and the target material 31 form the optimal acoustic alignment relationship.

[0053] For details, please refer to Figure 2 , Figures 9-11The automatic traversal testing of the transducer elements is automated through a triaxial test platform 6. This platform integrates multiple sets of highly wear-resistant conductive test probes and is equipped with components such as 156-pin sockets and Tyco sockets to adapt to different interfaces, meeting the testing needs of transducers with different pin definitions. The socket mounting base can move back and forth along the Y-axis. A crossbeam is mounted on the gantry of the triaxial test platform 6, which can move up and down along the Z-axis. Two independently moving sliders are mounted on the crossbeam, each moving left and right along the X-axis. The right slider mounts test pins for the 156-pin connector, and the left slider mounts test pins for the Tyco connector, ensuring precise contact between the probes and the lead-out contacts of each transducer element.

[0054] like Figure 10 As shown, the 156-pin connector interface includes a 156-pin socket mounting bracket, a 156-pin socket, a grounding pad, a grounding plate, a switch, signal line probes, and a ground probe. The probe on the right is the signal line probe, and the probe on the left is the ground probe. A grounding plate is installed on the side of the 156-pin connector. When the signal line probe contacts the signal line pin, the probe on the left simultaneously contacts the grounding plate, forming a loop to test the transducer array element signal. A switch is provided on the right side for switching between testing probes with two different grounding methods.

[0055] like Figure 11 As shown, the Tyco connector interface includes four support pillars, a circuit board base, a Tyco socket, a Tyco socket test circuit board, signal line probes, and ground probes. The four support pillars are used to fix the circuit board base. The Tyco socket test circuit board is installed on the circuit board base. The front probe is the signal line probe, and the rear probe is the ground probe. The corresponding circuit board has a signal source point on the front side and a ground pad on the rear side. When the signal line probe contacts the signal source point, the ground probe simultaneously contacts the ground pad, and the two points form a loop to test the transducer array element signal.

[0056] During testing, the triaxial testing platform 6 controls the probe to move point by point according to the preset array element arrangement. After each contact, it maintains the position for a preset duration to ensure sufficient signal acquisition. Simultaneously, the pulse generator 8 outputs an excitation pulse signal to trigger the transducer to generate an ultrasonic signal. The echo electrical signal formed after reflection by the target material 31 is acquired in real time by the oscilloscope 7, providing a high-quality data foundation for subsequent acoustic parameter calculations. The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. An automatic testing method for the acoustic performance of a transducer, characterized in that, Includes the following steps: (S1) Fix the transducer with a clamp; (S2) Configure and reuse parameters and select test mode: Input the corresponding test parameter information according to the model of the transducer under test and save it automatically. When testing the same model of transducer later, the saved parameters can be directly called. At the same time, based on whether the transducer is equipped with a matching target, select the fixed target test mode or the non-fixed target test mode. (S3) Perform acoustic alignment: Adjust the relative position of the transducer and the target material through the three-axis moving mechanism and angle adjustment component to make the distance between the key array element of the transducer and the reflective surface of the target material consistent, and complete the alignment adjustment. (S4) Start the automated testing program to perform automatic traversal testing of array elements, where, If it is a fixed target test mode: the triaxial test platform controls the test probe to move point by point according to the arrangement of transducer array elements, and contacts all array element lead-out contacts in sequence. Simultaneously, the pulse generator outputs the excitation signal and the oscilloscope collects the echo electrical signal after being reflected by the target. If it is a non-fixed target test mode: the test probe is controlled by the triaxial test platform to move point by point, and the target is adapted to the test progress of the array element to keep the target and the current test array element always in acoustic alignment. Simultaneously, the excitation signal is output through the pulse generator and the echo electrical signal after being reflected by the target is collected by the oscilloscope. (S5) Perform conversion analysis on the collected echo electrical signals and calculate the acoustic performance parameters; (S6) Automatically save test data and generate test reports.

2. The automatic testing method for the acoustic performance of a transducer as described in claim 1, characterized in that, The contact surface of the fixture in step (S1) is a soft inner liner. The soft inner liner has a contour structure that matches the shape of the transducer and can limit the clamping freedom of the transducer by contour fitting.

3. The automatic testing method for the acoustic performance of a transducer as described in claim 2, characterized in that, Position the transducer at the center symmetrical line within the fixture.

4. The automatic testing method for the acoustic performance of a transducer as described in claim 1, characterized in that, Step (S2) "Parameter Configuration and Reuse" specifically includes: When testing a certain model of transducer for the first time, manually input or import the exclusive test parameters corresponding to that model of transducer through the system. The system binds the parameters with the transducer model and stores them. When testing the same model of transducer in subsequent tests, only the transducer model needs to be input. The system will automatically match and call the stored exclusive test parameters without the need for manual reconfiguration.

5. The automatic testing method for the acoustic performance of a transducer as described in claim 1, characterized in that, Step (S2) "Select test mode based on whether the transducer is equipped with a matching target" specifically includes: if the transducer comes with a matching target, then select the fixed target test mode; If there is no suitable target for the transducer, and different array elements need to be tested by adapting the target displacement, then the non-fixed target test mode should be selected.

6. The automatic testing method for the acoustic performance of a transducer as described in claim 1, characterized in that, The acoustic alignment in step (S3) is achieved through multi-dimensional adjustment, which includes translational adjustment along the three orthogonal directions X, Y, and Z, as well as angular adjustment around the X, Y, and Z axes. This is used to compensate for transducer clamping and target installation deviations, so that the distance from the key array element of the transducer to the reflective surface of the target is consistent.

7. The automatic testing method for the acoustic performance of a transducer as described in claim 1, characterized in that, The criteria for determining the alignment adjustment in step (S3) are: the distances from the center element, the first element, and the final element of the transducer to the reflective surface of the target material are all consistent, and the maximum amplitude of the first echo is used as the sign that the adjustment is complete.

8. The automatic testing method for the acoustic performance of a transducer as described in claim 1, characterized in that, In the fixed target test mode of step (S4), the target is fixed in the test water tank by the positioning structure. The test water tank restricts the installation freedom of the target by the positioning adaptation relationship, so that the target is in the same fixed position every time it is installed, and the relative position of the transducer and the target is repeatable.

9. The automatic testing method for the acoustic performance of a transducer as described in claim 8, characterized in that, In the fixed target test mode of step (S4), the distance between the reflective surface of the target and each element of the transducer is kept consistent, and the contour shape of the reflective surface matches the emission angle of the transducer array.

10. The automatic testing method for the acoustic performance of a transducer as described in claim 1, characterized in that, In the non-fixed target testing mode of step (S4), the displacement method aims to achieve acoustic alignment between the current test element and the target. The target material adaptation displacement is as follows: the target material is driven by a synchronous drive mechanism. After each array element test is completed, the target material swings at a preset angle to achieve relative displacement with the transducer array element.

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