Ultrasonic transducer measuring device and use method thereof

Abstract

The invention discloses an ultrasonic transducer measuring device and a use method thereof, and the device comprises a transducer large-scale verification tool which is suitable for positioning a plurality of ultrasonic transducers to be measured; the performance parameter automatic acquisition device is provided with a detection end and an output end, the detection has three linear motion freedom degrees of an X axis, a Y axis and a Z axis, and the detection end sequentially obtains performance parameters of the to-be-detected ultrasonic transducers positioned to the transducer large-scale verification tool in a movable mode; and the upper computer is connected with the output end of the performance parameter automatic acquisition device and is suitable for receiving and processing the ultrasonic transducer performance parameters output by the performance parameter automatic acquisition device. According to the transducer large-scale verification tool, multi-station synchronous positioning is achieved, in combination with the movable detection end of the performance parameter automatic acquisition device, parameter detection of the transducers in batches can be efficiently completed, and the detection efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic transducer testing technology, specifically to an ultrasonic transducer measuring device and its usage method. Background Technology

[0002] An ultrasonic transducer is an electronic device capable of converting electrical energy into mechanical energy (ultrasound). In the current context of widespread application of ultrasonic transducers, the transducer, as a core component, directly affects the accuracy and stability of the metrology system. However, due to factors such as material errors, process control precision, and environmental conditions during the manufacturing process, transducers within the same batch may exhibit significant differences in various parameters. Key performance indicators such as high frequency, impedance characteristics, output amplitude, and capacitance may deviate, thus reducing the overall metrological accuracy of the system. In practical applications, transducers need to operate in pairs, propagating probe signals in both forward and reverse directions, and measuring flow rate by utilizing the propagation time difference. Therefore, the degree of performance matching between transducers is a key parameter for ensuring signal accuracy and improving detection precision.

[0003] At present, the transducer repair process relies heavily on manual judgment and simplified parameter comparison. The judgment methods lack quantification and systematicity, which cannot meet the needs of high consistency and automated screening in large-scale industrial production. Summary of the Invention

[0004] In view of this, the present invention provides an ultrasonic transducer measuring device and its usage method to solve the problem that the current transducer repair process relies heavily on manual judgment, which cannot meet the requirements of high consistency and automated screening in large-scale industrial production.

[0005] In a first aspect, the present invention provides an ultrasonic transducer parameter measurement system, comprising: A transducer mass testing fixture, suitable for locating multiple ultrasonic transducers under test; An automated performance parameter acquisition device has a detection end and an output end. The detection end has three linear motion degrees of freedom: X-axis, Y-axis and Z-axis. The detection end can acquire the performance parameters of each ultrasonic transducer under test that is positioned to the transducer mass calibration fixture in a movable manner. The host computer is connected to the output end of the automated performance parameter acquisition device, and is adapted to receive and process the ultrasonic transducer performance parameters output by the automated performance parameter acquisition device, and construct a similarity evaluation model based on a preset algorithm to output the quantitative similarity results between ultrasonic transducers.

[0006] The beneficial effects of the aforementioned ultrasonic transducer parameter measurement system are as follows: Multi-station synchronous positioning is achieved through transducer mass calibration fixtures; combined with the movable detection end of the automated performance parameter acquisition device, parameter testing of batch transducers can be efficiently completed, significantly improving testing efficiency; the data processing function of the host computer enables quantitative analysis and systematic management of parameters, effectively avoiding human judgment errors, improving transducer performance matching accuracy, meeting the automated requirements for transducer consistency screening in large-scale industrial production, reducing labor costs, and improving the overall stability of the metrology system.

[0007] In one optional implementation, the transducer mass production calibration fixture includes: At least one water tank having a receiving cavity adapted to provide a coupling medium environment for transducer testing; A baffle plate covers the opening of the receiving cavity of the water tank. The baffle plate has multiple through water tank openings, which are used to embed and position the ultrasonic transducer under test.

[0008] In one alternative embodiment, the plurality of water inlets are arranged in an equally spaced array on the water tank baffle.

[0009] The beneficial effects of the above technical solution are as follows: the transducer mass testing fixture adopts a double-layer water tank structure, multiple transducer test boards are arranged at equal intervals, and each test unit is independently configured with a contact circuit board and wiring terminals to ensure that multiple sets of transducer parameters are collected synchronously under the same test environment, avoiding timing differences.

[0010] In one optional embodiment, the transducer mass production calibration fixture further includes: A transducer test board is set on the side of the water tank. A contact circuit board is provided on the test board at the position corresponding to each water tank opening. At least two test electrodes are attached to the surface of the contact circuit board. A terminal block is fixed to the contact circuit board. The terminal block is electrically connected to the pin of the transducer under test through a snap-fit ​​structure, and the output end of the test electrode is connected to the terminal block.

[0011] In one optional implementation, the detection end of the automated performance parameter acquisition device includes: The multi-axis motion platform has three linear motion degrees of freedom: X-axis, Y-axis, and Z-axis. The detection unit is installed on the end effector of the multi-axis motion platform. The detection unit is equipped with a probe for detecting the ultrasonic transducer under test, which is used to collect the electrical signal of the transducer in a contact manner.

[0012] The beneficial effects of the above technical solution are as follows: by using a multi-axis motion platform driven by a robotic arm, the automatic contact and positioning of multiple ultrasonic transducers can be achieved, avoiding the traditional method of relying on manual probe contact, and effectively improving the stability and consistency of the testing process.

[0013] In one optional implementation, the multi-axis motion platform includes: The Y-axis motion platform includes a first Y-axis guide rail, a second Y-axis guide rail, a first Y-axis slider, a second Y-axis slider, and a Y-axis drive unit. The first Y-axis guide rail and the second Y-axis guide rail are arranged along the Y-axis. The first Y-axis slider is slidably mounted on the first Y-axis guide rail, and the second Y-axis slider is slidably mounted on the second Y-axis guide rail. The Y-axis drive unit drives the first Y-axis slider and the second Y-axis slider to move synchronously, thereby moving the entire X-axis motion platform along the Y-axis direction. The X-axis motion platform includes an X-axis guide rail, an X-axis slider, and an X-axis drive unit. The X-axis guide rail extends horizontally, and its two ends are respectively connected to the first Y-axis slider and the second Y-axis slider of the Y-axis motion platform. The X-axis slider is slidably mounted on the X-axis guide rail, and the X-axis drive unit drives the X-axis slider to perform linear motion along the X-axis guide rail. The Z-axis motion platform includes a Z-axis guide rail, a Z-axis slider, and a Z-axis drive unit. The Z-axis guide rail is vertically positioned at the front end of the Z-axis slider. The Z-axis slider is connected to the detection unit. The Z-axis drive unit drives the Z-axis slider to move up and down along the Z-axis guide rail to adjust the contact pressure between the detection unit and the test electrode.

[0014] In one optional embodiment, the Y-axis drive unit includes a Y-axis servo motor, a ball screw, a first coupling, and a second coupling. The ball screw extends along the Y-axis direction, and its two ends are connected to the screws of the first Y-axis guide rail and the second Y-axis guide rail respectively through the first coupling and the second coupling. The Y-axis servo motor is connected to the first coupling or the second coupling, drives the ball screw to rotate, and synchronously drives the first Y-axis slider and the second Y-axis slider to perform linear motion through the first coupling and the second coupling. The X-axis drive unit includes an X-axis servo motor and a third coupling. The X-axis servo motor is connected to the lead screw of the X-axis guide rail through the third coupling, driving the X-axis slider to move linearly along the X-axis guide rail. The Z-axis drive unit includes a Z-axis motor and a gear and rack transmission mechanism. The Z-axis motor is fixed on the Z-axis guide rail, and its output shaft is connected to the Z-axis slider through a transmission component.

[0015] The aforementioned ultrasonic transducer parameter measurement system can simultaneously acquire multiple points of transient and steady-state parameters of the transducer, and features high resolution, high repeatability, and traceability, making it suitable for parameter testing needs in complex environments.

[0016] Secondly, the present invention provides a method of using an ultrasonic transducer measuring device, comprising the following steps: S1. Transducer positioning and loading: Multiple ultrasonic transducers to be tested are loaded into a transducer mass testing fixture, and the standardized positioning and batch fixing of the transducers are achieved through the transducer mass testing fixture; S2. Automated parameter acquisition: Start the automated performance parameter acquisition device, move sequentially to the position of each transducer after positioning according to the preset path, and contact the test electrodes of the transducer to acquire multi-dimensional performance parameters; S3. Data transmission and processing: The collected multi-dimensional performance parameters are transmitted to the host computer, and the host computer performs similarity calculation on the multi-dimensional performance parameters.

[0017] In an optional implementation, in step S2, the preset path is pre-stored via a programmable controller, including: X-axis motion: The drive detection unit scans the same row of transducers sequentially along the horizontal direction; Y-axis motion: Drive the detection unit to switch to different transducers along the vertical direction; Z-axis movement: Drives the detection unit to rise and fall to adjust the contact pressure with the test electrode.

[0018] In one optional implementation, the method further includes the following steps: determining whether the current batch parameter test is completed; if completed, re-initializing and loading the transducer to be tested; otherwise, continuing to complete the similarity calculation and matching analysis of the current ultrasonic transducer; after the host computer has matched the similarity of all batches of ultrasonic transducers, the system operation ends; otherwise, it returns to initialization and loading of the transducer to be tested, and continues to complete the test of the next batch of ultrasonic transducers until the end.

[0019] The beneficial effects of the above technical solution are: it completes the performance acquisition and screening of multiple transducers within a single testing cycle, possesses good scalability and batch processing capabilities, and significantly improves pairing efficiency in large-scale production environments. It also greatly reduces manpower input and time consumption, and effectively controls human judgment errors.

[0020] In an optional implementation, step S3 involves calculating the similarity of multi-dimensional performance parameters using a host computer, specifically including the following steps: S10. Set the model objective: Construct a parameter similarity prediction model based on multivariate regression, and determine the model's predictor variable matrix and response variable; S20. Data preprocessing: Standardize the predicted variable matrix and select initial principal components to eliminate the influence of dimensions; S30. Model Building: Optimize the model by iteratively solving principal components, calculating residuals, and performing cross-validation tests to establish the regression relationship between predictor variables and response variables; S40. Model Output and Interpretation: Based on the regression relationship, output the transducer parameter similarity measurement results and analyze the influence weight of each predictor variable on the response variable.

[0021] In an optional implementation, in step S10, the prediction variable matrix includes a set of steady-state characteristic parameters and a set of transient characteristic parameters of the transducer. The set of steady-state characteristic parameters includes resonant frequency, anti-resonant frequency, resonant impedance, anti-resonant impedance, static capacitance, and impedance curve. The set of transient characteristic parameters includes echo waveform. The response variable includes the temperature drift parameter or zero-point offset of the transducer.

[0022] In an optional implementation, in step S10, the multivariate regression model includes a partial least squares regression model, used to quantify the matching degree of the ultrasonic transducer and predict its temperature drift behavior.

[0023] In an optional implementation, in step S30, the iterative solution of principal components includes iterating the initial principal components with weights and factors until convergence, calculating the residuals based on the loading matrix of the principal components, and performing the cross-validation test by solving the ratio of the sum of squared prediction errors to the sum of squared errors. When the ratio is less than a set threshold, the extraction of principal components is stopped.

[0024] In an optional implementation, in step S40, the similarity quantification result includes a transducer parameter similarity matrix and predicted values ​​of response variables, and the influence weights characterize the contribution of each steady-state / transient parameter to the response variable through regression coefficients.

[0025] The beneficial effects of the above technical solution are as follows: The host computer of the present invention has a built-in quantitative similarity calculation module. The quantitative similarity calculation module is an ultrasonic transducer matching degree prediction framework based on the partial least squares path model (PLSPM). It uses the steady-state characteristic parameter set (including resonant frequency, anti-resonant frequency, resonant impedance, anti-resonant impedance, static capacitance and impedance curve) and the transient characteristic parameter set (echo waveform, etc.) to form a multi-dimensional predictive variable matrix. Using parameters such as transducer temperature drift or zero-point offset as response variables, it iteratively extracts latent variables, calculates residuals and cross-validates to finally obtain a regression model with optimal explanatory power, providing a quantifiable decision basis for intelligent matching of transducer mass production. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the ultrasonic transducer measuring device provided by the present invention. Figure 2 A schematic diagram of the automated performance parameter acquisition device in the ultrasonic transducer measuring device provided by the present invention; Figure 3 This is a schematic diagram of the transducer mass calibration fixture in the ultrasonic transducer measuring device provided by the present invention. Figure 4 A flowchart for parameter similarity calculation in the ultrasonic transducer measuring device provided by the present invention; Figure 5 The flowchart shows the operation of the host computer similarity quantitative calculation module in the ultrasonic transducer measuring device provided by the present invention. Figure 6 This is a comparison chart of the predicted and actual values ​​of transducer temperature drift. Figure 7 A distribution diagram showing the difference between predicted and actual values ​​of transducer temperature drift.

[0028] Explanation of reference numerals in the attached figures: 1. Automated performance parameter acquisition device; 11. First coupling; 12. Second coupling; 13. First Y-axis guide rail; 14. Second Y-axis guide rail; 15. Ball screw; 16. Y-axis servo motor; 17. X-axis servo motor; 18. Cable drag chain; 19. Z-axis guide rail; 110. Electrode connector; 111. First electrode; 112. Second electrode; 113. First Y-axis slider; 114. Second Y-axis slider; 115. X-axis slider; 116. X-axis guide rail; 117. Third coupling. 2. Host computer; 3. Transducer mass testing fixture, 31. First ultrasonic transducer, 32. Water tank screw, 33. First water tank baffle, 34. First water tank opening, 35. First transducer test board, 36. First terminal block, 37. First terminal block clip, 38. First contact circuit board, 39. First test electrode of first contact circuit board, 310. Second test electrode of first contact circuit board, 311. First water tank, 312. Second water tank, 313. Twentieth water tank opening, 314. Twentieth ultrasonic transducer, 315. Twentieth transducer test board, 316. Second water tank baffle, 317. Twentieth terminal block, 318. Twentieth terminal block clip, 319. First test electrode of twentieth contact circuit board, 320. Second test electrode of twentieth contact circuit board, 321. Water tank baffle screw, 323. Twentieth contact circuit board; 4. Oscilloscope. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Combination Figures 1 to 7 As shown below, specific embodiments of the present invention will be described in detail below with reference to the ultrasonic transducer parameter measurement system of the first aspect of the present invention, the method of using the ultrasonic transducer measurement device of the second aspect of the present invention, and the quantitative calculation method of ultrasonic transducer parameter similarity of the third aspect of the present invention.

[0031] According to an embodiment of the present invention, in a first aspect, an ultrasonic transducer parameter measurement system is provided, including a transducer mass calibration fixture 3, an automated performance parameter acquisition device 1, and a host computer 2.

[0032] The transducer mass testing fixture 3 is suitable for locating multiple ultrasonic transducers to be tested.

[0033] The performance parameter automated acquisition device 1 has a detection end and an output end. The detection end has three linear motion degrees of freedom: X-axis, Y-axis and Z-axis. The detection end can acquire the performance parameters of each ultrasonic transducer under test, which is positioned to the transducer mass calibration fixture 3 in a movable manner.

[0034] The host computer 2 is connected to the output end of the performance parameter automated acquisition device 1, and is suitable for receiving and processing the ultrasonic transducer performance parameters output by the performance parameter automated acquisition device 1, and constructing a similarity evaluation model based on a preset algorithm to output the quantitative similarity results between ultrasonic transducers.

[0035] The aforementioned ultrasonic transducer parameter measurement system achieves multi-station synchronous positioning through the transducer mass calibration fixture 3. Combined with the movable detection end of the performance parameter automated acquisition device 1, it can efficiently complete the parameter testing of batch transducers, significantly improving testing efficiency. The data processing function of the host computer 2 enables quantitative analysis and systematic management of parameters, effectively avoiding human judgment errors, improving the performance matching accuracy of transducers, meeting the automated requirements for transducer consistency screening in large-scale industrial production, reducing labor costs, and improving the overall stability of the metrology system.

[0036] In some embodiments, the transducer mass testing fixture 3 includes a water tank and a water tank baffle. The water tank has at least one cavity, suitable for providing a coupling medium environment for transducer testing. The water tank baffle covers the opening of the cavity of the water tank, and the baffle has multiple through-holes for embedding and positioning the ultrasonic transducer under test.

[0037] In this embodiment, the transducer mass testing fixture 3 provides a stable coupling medium environment through a water tank, ensuring the consistency of test conditions. The design of multiple water tank openings enables the synchronous positioning of multiple transducers, improving the space utilization rate of batch testing. Its modular structure facilitates the expansion of the number of workstations according to testing needs, adapting to different scale production scenarios. At the same time, the cover design of the water tank baffle effectively reduces the interference of the external environment on the test medium, improving the stability of parameter measurement.

[0038] Multiple water inlets are distributed in an equally spaced array on the baffle of the water tank. Specifically, the water inlets are distributed in a linear array along the length of the baffle.

[0039] The transducer mass testing fixture 3 also includes a transducer test board and terminal blocks. The transducer test board is located beside the water tank, and a contact circuit board is provided on the test board corresponding to each water tank opening. At least two test electrodes are mounted on the surface of the contact circuit board. The terminal blocks are fixed to the contact circuit board and are electrically connected to the pins of the transducer under test through a snap-fit ​​structure. The output terminals of the test electrodes are also connected to the terminal blocks.

[0040] The following example illustrates the transducer mass production calibration fixture 3 in this embodiment, using a setup with two water tanks, twenty water tank openings, and twenty ultrasonic transducers.

[0041] The two water tanks are designated as a first water tank 311 and a second water tank 312. Both water tanks have the same structure and function, and are arranged opposite each other at an interval. Both the first water tank 311 and the second water tank 312 have grooves.

[0042] There are two water tank baffles, namely a first water tank baffle 33 and a second water tank baffle 316. The two water tank baffles have the same structure and function. The first water tank baffle 33 is set on the groove of the first water tank 311, and the second water tank baffle 316 is set on the groove of the second water tank 312.

[0043] There are twenty water inlets, namely the first water inlet 34 to the twentieth water inlet 313. The first ten water inlets are dug out from left to right at equal intervals, vertically and horizontally on the first water tank baffle 33, and the latter ten water inlets are dug out from left to right at equal intervals, vertically and horizontally on the second water tank baffle 316. Each water inlet has the same structure and function.

[0044] Each water tank is secured to the test bench at both ends by two water tank screws 32. The screws for each water tank have the same structure and function.

[0045] Each sink baffle is secured to its corresponding sink using two sink baffle screws 321 at each end. The screws for each sink baffle have the same structure and function.

[0046] There are twenty transducer test plates, designated as the first transducer test plate 35 to the twentieth transducer test plate 315, each with the same structure and function. The first ten transducer test plates are located below the first water tank 311, arranged equally from left to right in a vertical and horizontal manner. The latter ten transducer test plates are located above the second water tank 312, arranged equally from left to right in a vertical and horizontal manner.

[0047] There are twenty terminal blocks, designated as terminal blocks 36 to 317, each with the same structure and function. Each terminal block is secured to the top of the contact circuit board by a terminal screw 322. The terminal blocks have openings for inserting terminal block clips.

[0048] Each terminal screw has the same structure and function. There are two terminal screws on each side of each terminal, which are used to fix the terminal to the contact circuit board.

[0049] There are twenty contact circuit boards, namely the first contact circuit board 38 to the twentieth contact circuit board 323, each with the same structure and function. They are fixed to the bottom of the terminal block by screws.

[0050] There are twenty terminal block clips, namely the first terminal block clip 37 to the twentieth terminal block clip 318, each with the same structure and function. Each terminal block clip is embedded inside the terminal block.

[0051] There are forty test electrodes, namely, the first test electrode 39 to the twentieth test electrode 319 of the first contact circuit board, and the second test electrodes 310 to the twentieth test electrode 320 of the first contact circuit board. Each test electrode has the same structure and function, and is attached to the top layer of the contact circuit board as a test electrode surface patch.

[0052] There are twenty ultrasonic transducers, designated as the first ultrasonic transducer 31 to the twentieth ultrasonic transducer 314, each with the same structure and function. Each ultrasonic transducer is installed in a water tank opening. The first ultrasonic transducer 31 is in the first water tank opening 34, and the twentieth ultrasonic transducer 314 is in the twentieth water tank opening 313. Each ultrasonic transducer has two test lines leading to two test points.

[0053] After each water tank is filled, the first water tank baffle 33 is placed in the groove of the first water tank 311, and the second water tank baffle 316 is placed in the groove of the second water tank 312. The first water tank 311 and the second water tank 312 each have ten water inlets. The first ultrasonic transducer 31 to the twentieth ultrasonic transducer 314 are placed into the first water inlet 34 to the twentieth water inlet 313 of the water tank baffle. The detection points of two detection lines of each of the first ultrasonic transducers 31 to the twentieth ultrasonic transducers 314 are sequentially installed into the first terminal block 36 to the twentieth terminal block 317, and the detection points are secured using the first terminal block clips 37 to the twentieth terminal block clips 318.

[0054] The transducer mass testing fixture 3 includes multiple test units from the first transducer test board 35 to the twentieth transducer test board 315. Each test unit includes corresponding first terminal blocks 36 to twentieth terminal blocks 317, first terminal block clips 37 to twentieth terminal block clips 318, first contact circuit boards 38 to twentieth contact circuit boards 323, and first test electrodes 39 to 319 and second test electrodes 310 to 320 located on the top layer of the contact circuit boards. The test elements on each transducer test board are arranged in the same way. The test electrodes are attached to the surface of the contact circuit boards. Terminal blocks are installed on the upper part of the contact circuit boards. The terminal block clips are embedded in the terminals. The ends of the test electrodes are led out and connected point-to-point to the detection points of the two detection lines of the ultrasonic transducer inserted in the terminals. This allows the automatic performance parameter acquisition device 1 to effectively acquire the similarity parameters of the ultrasonic transducer when the electrodes in the device contact the corresponding test electrodes.

[0055] In some embodiments, the detection end of the automated performance parameter acquisition device 1 includes a multi-axis motion platform and a detection unit. The multi-axis motion platform has three linear motion degrees of freedom: X-axis, Y-axis, and Z-axis. The detection unit is mounted on the end effector of the multi-axis motion platform and is equipped with a probe for detecting the ultrasonic transducer under test, used for contact-type acquisition of the transducer's electrical signals.

[0056] Multi-axis motion platforms include Y-axis motion platforms, X-axis motion platforms, and Z-axis motion platforms.

[0057] The Y-axis motion platform includes a first Y-axis guide rail 13, a second Y-axis guide rail 14, a first Y-axis slider 113, a second Y-axis slider 114, and a Y-axis drive unit. The first Y-axis guide rail 13 and the second Y-axis guide rail 14 are arranged along the Y-axis and have the same structure. The first Y-axis slider 113 is slidably mounted on the first Y-axis guide rail 13, and the second Y-axis slider 114 is slidably mounted on the second Y-axis guide rail 14. The Y-axis drive unit drives the first Y-axis slider 113 and the second Y-axis slider 114 to move synchronously, thereby moving the entire X-axis motion platform along the Y-axis direction.

[0058] A guide rail base plate is connected below the first Y-axis guide rail 13 and the second Y-axis guide rail 14. The guide rail base plate is used to fix the first Y-axis guide rail 13 and the second Y-axis guide rail 14 on the test table.

[0059] The X-axis motion platform includes an X-axis guide rail 116, an X-axis slider 115, and an X-axis drive unit. The X-axis guide rail 116 extends horizontally, and its two ends are respectively connected to the Y-axis first slider 113 and the Y-axis second slider 114 of the Y-axis motion platform.

[0060] The Y-axis drive unit includes a Y-axis servo motor 16, a ball screw 15, a first coupling 11, and a second coupling 12. The ball screw 15 extends along the Y-axis direction, and its two ends are connected to the lead screws of the first Y-axis guide rail 13 and the second Y-axis guide rail 14 respectively through the first coupling 11 and the second coupling 12. The Y-axis servo motor 16 is connected to either the first coupling 11 or the second coupling 12, driving the ball screw 15 to rotate and synchronously driving the first Y-axis slider 113 and the second Y-axis slider 114 to perform linear motion through the first coupling 11 and the second coupling 12. Specifically, the right end of the first Y-axis guide rail 13 is connected to the left end of the first coupling 11. The right end of the second Y-axis guide rail 14 is connected to the Y-axis servo motor 16, and the left end is connected to the right end of the second coupling 12. The Y-axis servo motor 16 is connected to the second coupling 12 via the second Y-axis guide rail 14. The second coupling 12 is connected to the ball screw 15, which is further connected to the first coupling 11, forming a mechanical transmission chain. The rotation of the Y-axis servo motor 16 drives the second coupling 12 to generate rotational mechanical motion, which in turn drives the ball screw 15 to rotate, thereby synchronously driving the first coupling 11 to rotate, achieving synchronous rotation of the first coupling 11 and the second coupling 12. The rotational motion of the first coupling 11 drives the first Y-axis slider 113 on the first Y-axis guide rail 13 to achieve linear Y-axis motion, and the rotational motion of the second coupling 12 drives the second Y-axis slider 114 on the second Y-axis guide rail 14 to achieve linear Y-axis motion, thus achieving synchronous linear motion of the first Y-axis slider 113 and the second Y-axis slider 114. The left and right bottom edges of the X-axis guide rail 116 are each connected to a first Y-axis slider 113 and a second Y-axis slider 114. This allows the X-axis guide rail 116 to perform linear Y-axis movement in sync with the synchronous movement of the first Y-axis slider 113 and the second Y-axis slider 114.

[0061] The X-axis drive unit includes an X-axis servo motor 17, a third coupling 117, and a lead screw. The X-axis slider 115 is slidably mounted on the X-axis guide rail 116. The upper end of the X-axis guide rail 116 is connected to the third coupling 117, and the upper end of the third coupling 117 is connected to the X-axis servo motor 17. The X-axis servo motor 17 is connected to the lead screw of the X-axis guide rail 116 through the third coupling 117. The third coupling 117 may include a first bevel gear and a second bevel gear. The lead screw of the X-axis guide rail 116 is arranged parallel to the X-axis guide rail 116. The lead screw of the X-axis guide rail 116 is threadedly assembled with the X-axis slider 115. The rotational mechanical motion of the X-axis servo motor 17 is converted into the linear motion of the X-axis slider 115 on the X-axis guide rail 116 through the third coupling 117.

[0062] The Z-axis motion platform includes a Z-axis guide rail 19, a Z-axis slider, and a Z-axis drive unit. The Z-axis guide rail is vertically positioned at the front end of the X-axis slider 115. The Z-axis guide rail 19 is connected to the X-axis slider 115. The Z-axis slider is slidably mounted on the Z-axis guide rail 19 and connected to the detection unit. The Z-axis drive unit drives the Z-axis slider to move up and down along the Z-axis guide rail to adjust the contact pressure between the detection unit and the test electrode.

[0063] The Z-axis drive unit includes a Z-axis motor and a transmission assembly. The Z-axis motor is fixed on the Z-axis guide rail 19, and its output shaft is connected to the Z-axis slider through the transmission assembly. The transmission assembly can be a Z-axis lead screw, which is connected to the Z-axis motor. The Z-axis slider is threadedly fitted with the Z-axis lead screw, and the Z-axis motor is built into the Z-axis guide rail 19.

[0064] The detection unit is an electrode connector 110, which performs Z-axis linear movement under the control of a Z-axis motor. A first electrode 111 and a second electrode 112 are fixed to the lower part of the electrode connector 110. The first electrode 111 and the second electrode 112 are used to acquire the test electrode signals of the ultrasonic transducer. The first and second electrodes fixed to the lower end of the electrode connector synchronously abut against the test electrodes on the contact circuit board, transmitting the transient (e.g., echo waveform) and steady-state (e.g., resonant frequency, impedance) signals of the transducer to the oscilloscope via a cable chain, achieving synchronous recording of multiple parameters.

[0065] The multi-axis motion platform also includes cable drag chains 18, of which there are two. The cable drag chains 18 are used to integrate the wiring of the transducer mass calibration fixture 3 and the performance parameter automated acquisition device 1, keeping the wiring of the test platform neat.

[0066] In some embodiments, the host computer 2 is used to perform similarity calculation and matching analysis of the ultrasonic transducers. The oscilloscope 4 is used to collect and display the ultrasonic transducer data.

[0067] According to an embodiment of the present invention, in a second aspect, a method of using an ultrasonic transducer measuring device is provided, comprising the following steps: S1. Transducer positioning and loading: Load multiple ultrasonic transducers to be tested into the transducer mass testing fixture 3, and realize the standardized positioning and batch fixing of transducers through the transducer mass testing fixture 3.

[0068] S2. Automated parameter acquisition: Start the performance parameter automated acquisition device 1, move sequentially to the position of each transducer after positioning according to the preset path, and contact the test electrodes of the transducer to acquire multi-dimensional performance parameters.

[0069] In step S2, the preset path is pre-stored by the programmable controller, including: X-axis motion: The drive detection unit scans the same row of transducers sequentially along the horizontal direction; Y-axis motion: Drive the detection unit to switch to different transducers along the vertical direction; Z-axis movement: Drives the detection unit to rise and fall to adjust the contact pressure with the test electrode.

[0070] S3. Data transmission and processing: The collected multi-dimensional performance parameters are transmitted to the host computer 2, and the host computer 2 performs similarity calculation on the multi-dimensional performance parameters.

[0071] The following example illustrates the usage of the ultrasonic transducer measuring device in this embodiment, using a setup with two water tanks, twenty water tank openings, and twenty ultrasonic transducers.

[0072] Before the test begins, the system initialization operation is performed first, and each motion axis of the robotic arm completes zero positioning. Then, the Y-axis servo motor 16 starts, driving the second coupling 12 connected to it through the second Y-axis guide rail 14, which in turn drives the ball screw 15 to rotate. This rotational motion synchronously drives the first coupling 11, making it and the second coupling 12 achieve consistent rotational mechanical motion, and respectively driving the first Y-axis slider 113 on the first Y-axis guide rail 13 and the second Y-axis slider 114 on the second Y-axis guide rail 14 to move synchronously along the Y-axis, thereby realizing the forward and backward movement of the X-axis guide rail 116 and the X-axis slider 115 supported by the two sliders along the Y-axis.

[0073] Next, the X-axis servo motor 17 starts, driving the third coupling 117 to rotate, which in turn drives the X-axis slider 115 to achieve precise linear displacement along the X-axis direction on the X-axis guide rail 116. The front end of the X-axis slider 115 is connected to the Z-axis guide rail, and an electrode connector 110 is installed below it. The lower end of the electrode connector is fixed with a first electrode 111 and a second electrode 112, which can move in the X-axis and Y-axis directions. After the X-axis and Y-axis positioning of the electrodes is completed, the Z-axis movement is controlled by the Z-axis motor, which drives the electrode connector 110 to move downward along the Z-axis direction through the Z-axis guide rail, so that the first electrode 111 contacts the first test electrode 39 of the first contact circuit board, and the second electrode 112 contacts the second test electrode 310 of the first contact circuit board, thus establishing an electrical connection.

[0074] After contact is completed, the acquisition device transmits the acoustic and electrical parameter signals output by the ultrasonic transducer to the oscilloscope 4 through the signal path for acquisition and recording. The system then moves sequentially to the next test position and repeats the above process until the first electrode 111 moves to the first test electrode 319 of the twentieth contact circuit board and the second electrode 112 moves to the second test electrode 320 of the twentieth contact circuit board. After completing one round of similarity parameter testing, the system enters the next round of testing.

[0075] like Figure 3As shown, the transducer mass production calibration fixture 3 firstly fixes the first water tank 311 and the second water tank 312 onto the test platform, securing them in place with their respective water tank screws 32. Before testing, an appropriate amount of deionized water or ultrasonic coupling fluid is injected into both water tanks as the required underwater acoustic medium. Subsequently, the first water tank baffle 33 and the second water tank baffle 316 are respectively installed in the groove positions of their corresponding water tanks and locked in place with the water tank baffle screws 321, sealing the top of the water tanks. The first water tank openings 34 to twentieth water tank openings 313 carved out on the surface of the baffles are equidistantly arranged and vertically aligned. The first ultrasonic transducers 31 to twentieth ultrasonic transducers 314 are respectively inserted into their respective water tank openings, ensuring that the transducers are accurately embedded below the first water tank opening 34 of the first water tank baffle 33 and the twentieth water tank opening 313 of the second water tank baffle 316. The two signal output lines of the transducer are respectively inserted into the sockets of the first terminal block 36 to the twentieth terminal block 317, and are secured and locked using the first terminal block clips 37 to the twentieth terminal block clips 318 to ensure a stable connection during testing. Each terminal block is mounted on the corresponding first contact circuit board 38 to the twentieth contact circuit board 323 via terminal block screws 322, and the first test electrode 39 of the first contact circuit board, the second test electrodes 310 to 319 of the first contact circuit board, and the second test electrode 320 of the twentieth contact circuit board correspond one-to-one with the two test points led out from each ultrasonic transducer embedded below each terminal block. The data from the ultrasonic transducer is transmitted to the test electrodes. After the performance parameter automated acquisition device 1 completes the X-axis and Y-axis positioning and Z-axis pressing, the first electrode 111 and the second electrode 112 will respectively contact the two test electrodes on each contact circuit board to complete the acquisition of the ultrasonic transducer electrode signals. Subsequently, the oscilloscope 4 and the host computer 2 will acquire, display, and record the electrical parameter data of the corresponding transducer. This testing device supports the parallel loading and automatic testing of 20 transducers. It features a compact design and quick clamping, making it suitable for efficient measurement and screening of large batches of transducers in underwater acoustic environments.

[0076] like Figure 4As shown, the initialization and loading of the transducer under test are performed, including the initialization of the automated performance parameter acquisition device 1 and the loading of the transducer under test onto the transducer mass testing fixture 3. An excitation signal is sent to the ultrasonic transducer via the external circuit board, causing it to enter the working state. Subsequently, the control system is activated, manipulating the electrodes of the automated performance parameter acquisition device 1 to move along the X, Y, and Z axes to contact the test electrodes of the ultrasonic transducer, acquiring and displaying data on an oscilloscope. The acquired data is then sent to the host computer 2 for similarity calculation and matching analysis. The system determines whether the parameter testing of the current batch is complete. If complete, the initialization and loading of the transducer under test are re-established; otherwise, the similarity calculation and matching analysis of the current ultrasonic transducer continues. Once the host computer has matched the similarity of all batches of ultrasonic transducers, the system operation ends; otherwise, it returns to the initialization and loading of the transducer under test to continue testing the next batch of ultrasonic transducers until the process is complete.

[0077] According to an embodiment of the present invention, a third aspect, such as Figure 5 As shown, a method for calculating the similarity of ultrasonic transducer parameters is provided, including the following steps: S10. Set the model objective: Construct a parameter similarity prediction model based on multivariate regression, and determine the model's predictor variable matrix and response variable.

[0078] The predictor variable matrix includes the steady-state characteristic parameter set and the transient characteristic parameter set of the transducer. The steady-state characteristic parameter set includes the resonant frequency, anti-resonant frequency, resonant impedance, anti-resonant impedance, static capacitance and impedance curve. The transient characteristic parameter set includes the echo waveform. The response variable includes the temperature drift parameter or zero offset of the transducer.

[0079] Multivariate regression models, including partial least squares regression (PLSR) models, are used to quantify the matching degree of ultrasonic transducers and predict their temperature drift behavior.

[0080] S20. Data preprocessing: Standardize the predictor variable matrix and select initial principal components to eliminate the influence of dimensions and improve model stability.

[0081] S30. Model Construction: The model is optimized through iterative principal component solving, residual calculation, and cross-validation testing to establish the regression relationship between the predictor and response variables. Iterative principal component solving involves iterating the weights and factors of the initial principal components until convergence. Residual calculation is based on the loading matrix of the principal components. Cross-validation testing is achieved by solving the ratio of the sum of squared prediction errors to the sum of squared total errors. Principal component extraction is stopped when the ratio is less than a set threshold.

[0082] The initial principal components are iterated with weights and factors until convergence. After further residual calculation, the principal components are extracted again and the weights and factors are iterated and the residuals are calculated again until the cross-validity condition is met.

[0083] Cross-validation test, which calculates the ratio of the sum of squared prediction errors to the sum of squared errors, stops extracting principal components if the ratio is less than a set value, which helps improve the accuracy of the model.

[0084] Regression model construction: Establish the final regression model by establishing the regression relationship between latent variables and response variables (such as temperature drift).

[0085] The specific steps are as follows: Begin constructing the model objective, whose input... These are steady-state parameters (resonant frequency, anti-resonant frequency, resonant impedance, anti-resonant impedance, static capacitance, impedance curve, etc.). For transient parameters (such as echo waveforms), the temperature drift matrix serves as the response variable or auxiliary explanatory variable. The output is the predicted value of the transducer zero-point offset (temperature drift response), or a matched metric. Further data preprocessing is performed on the raw data. and Standardize to obtain and and from Choose the column with the largest variance as the initial column. (First principal component) to maximize information retention.

[0086] Further iterative solutions to the principal components, from Choose the column with the largest variance as the initial Then, weight and factor iterations are performed to calculate... weight vector :

[0087] calculate score vector :

[0088] calculate weight vector :

[0089] renew :

[0090] Iterate until convergence and Stablize.

[0091] Further residual calculations were performed. load :

[0092] calculate residuals:

[0093] calculate load :

[0094] calculate residuals:

[0095] use and Repeated weighting and factor iteration, and residual calculation, to extract the next set of principal components. , until the cross-validation condition is met.

[0096] Further cross-validation was performed, with a limit value of 0.05. The following formula was used to determine whether principal component extraction should be stopped: Define the sum of squared prediction errors PRESS and the sum of squared errors SS:

[0097] like If the addition of principal components does not significantly improve the model, extraction is stopped. The process then returns to iteratively solving for principal components, repeating the iteration until cross-validation is established, and then proceeds to regression model construction.

[0098] Further regression model construction yielded the following final regression model form:

[0099] in For the latent variables of the score matrix, For the load matrix, Let be the residual matrix.

[0100] Through latent variables Establish a regression relationship with the response variable temperature drift.

[0101] S40. Model Output and Interpretation: Based on the regression relationship, output the similarity measurement results of the transducer parameters and analyze the influence weight of each predictor variable on the response variable.

[0102] The similarity quantification results include a transducer parameter similarity matrix and predicted values ​​of response variables. The transducer parameter similarity matrix provides a quantitative basis for comparing the performance matching degree between different transducers, supporting automated screening of transducers with similar performance for pairing. This solves the problem of insufficient quantification in traditional manual judgment and meets the high consistency pairing requirements in large-scale industrial production. The predicted values ​​of response variables predict key performance changes of the transducers in advance, helping to predict the stability of the transducers in practical applications and providing data support for transducer quality assessment and selection.

[0103] Influence weights are characterized by regression coefficients representing the contribution of each steady-state / transient parameter to the response variable. These regression coefficients reflect the impact of each steady-state / transient parameter on the response variable (e.g., temperature drift), predicting the temperature drift behavior of new transducers and aiding in matching degree assessment. Clarifying the contribution of each steady-state / transient parameter to the response variable identifies key parameters affecting transducer performance, optimizes testing priorities and subsequent improvement directions, and enhances the targeting and efficiency of parameter testing.

[0104] After the quantitative similarity calculation by the host computer is completed, the system will determine whether the parameter testing for the current batch is complete based on the calculation results of the quantitative similarity calculation module by the host computer.

[0105] Traditional matching methods, such as impedance curves, static capacitance, or output waveforms, can reflect some short-term characteristics of transducers, but cannot fully cover their transient and steady-state behavior, resulting in limitations in matching degree judgment under complex operating conditions. Furthermore, testing complexity and efficiency have become major technical challenges hindering the large-scale deployment of transducers. In contrast, the host computer 2 of this application incorporates a quantitative similarity calculation module. This module is based on a partial least squares path model (PLSPM) framework for predicting the matching degree of ultrasonic transducers. It uses a set of steady-state characteristic parameters (including resonant frequency, anti-resonant frequency, resonant impedance, anti-resonant impedance, static capacitance, and impedance curve) and a set of transient characteristic parameters (echo waveform, etc.) to construct a multi-dimensional predictive variable matrix. Using parameters such as transducer temperature drift or zero-point offset as response variables, it iteratively extracts latent variables, calculates residuals, and performs cross-validation to ultimately obtain a regression model with optimal explanatory power. This provides a quantifiable decision-making basis for intelligent matching in the mass production of transducers.

[0106] The automated performance parameter acquisition device uses X, Y, and Z-axis servo motors to drive electrodes for spatial positioning, simultaneously acquiring transient (echo waveforms, etc.) and steady-state (resonant frequency, impedance, etc.) multi-dimensional parameters of the transducer. Data is transmitted to the host computer in real-time via a communication interface, reducing the time required for manual intervention. The parameter similarity calculation system in the host computer, based on a partial least squares path model (PLSPM), constructs a predictive variable matrix from the acquired multi-dimensional performance data. Using temperature drift or zero-point offset as the response variable, it iteratively extracts latent variables, calculates residuals, and performs cross-validation to complete data processing and automatically generate a similarity matrix. The system supports parallel computation of multiple sets of transducer data, directly outputting similarity matching scores and performance ranking results, replacing traditional manual parameter comparison methods and significantly improving the efficiency of quantitative analysis. This enhances the efficiency of subsequent quantitative analysis of transducer performance differences and optimizes the output of similarity matching scores.

[0107] like Figure 6 and Figure 7 As shown, this application employs a partial least squares regression (PLSR) algorithm to construct a predictive model for transducer parameter matching. Steady-state parameters (including static parameters and impedance curve similarity), transient parameters (echo waveform similarity), and measured temperature drift values ​​from 31 experimental samples are used as modeling data. A mapping relationship in the multidimensional parameter space is established through fifth-order polynomial regression. The established polynomial model is then used to predict transducer temperature drift. The experimental results are as follows. Figure 6 and Figure 7 The above results indicate that the established polynomial model can effectively characterize the nonlinear relationship between transducer parameter matching and temperature drift characteristics. In future research, higher-order relationships can be established to achieve better fitting results based on the needs of actual application scenarios.

[0108] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A parameter measurement system for an ultrasonic transducer, characterized in that, include: The transducer mass testing fixture (3) is suitable for positioning multiple ultrasonic transducers to be tested. The performance parameter automated acquisition device (1) has a detection end and an output end. The detection end has three linear motion degrees of freedom: X-axis, Y-axis and Z-axis. The detection end acquires the performance parameters of each ultrasonic transducer to be tested, which is positioned to the transducer mass calibration fixture (3) in a movable manner. The host computer (2) is connected to the output end of the performance parameter automatic acquisition device (1) and is adapted to receive and process the ultrasonic transducer performance parameters output by the performance parameter automatic acquisition device (1).

2. The ultrasonic transducer parameter measurement system according to claim 1, characterized in that, The transducer mass production calibration fixture (3) includes: At least one water tank having a receiving cavity adapted to provide a coupling medium environment for transducer testing; A baffle plate covers the opening of the receiving cavity of the water tank. The baffle plate is provided with multiple through water tank openings, which are used to embed and position the ultrasonic transducer under test. A transducer test board is set on the side of the water tank. A contact circuit board is provided on the test board at the position corresponding to each water tank opening. At least two test electrodes are attached to the surface of the contact circuit board. A terminal block is fixed to the contact circuit board. The terminal block is electrically connected to the pin of the transducer under test through a snap-fit ​​structure, and the output end of the test electrode is connected to the terminal block.

3. The ultrasonic transducer parameter measurement system according to claim 1, characterized in that, The detection end of the automated performance parameter acquisition device (1) includes: Multi-axis motion platform; The detection unit is installed on the end effector of the multi-axis motion platform. The detection unit is equipped with a probe for detecting the ultrasonic transducer under test, which is used to collect the electrical signal of the transducer in a contact manner. The multi-axis motion platform includes: The Y-axis motion platform includes a first Y-axis guide rail (13), a second Y-axis guide rail (14), a first Y-axis slider (113), a second Y-axis slider (114), and a Y-axis drive unit. The first Y-axis guide rail (13) and the second Y-axis guide rail (14) are arranged along the Y-axis. The first Y-axis slider (113) is slidably mounted on the first Y-axis guide rail (13), and the second Y-axis slider (114) is slidably mounted on the second Y-axis guide rail (14). The Y-axis drive unit drives the first Y-axis slider (113) and the second Y-axis slider (114) to move synchronously to drive the entire X-axis motion platform to move along the Y-axis direction. The X-axis motion platform includes an X-axis guide rail (116), an X-axis slider (115), and an X-axis drive unit. The X-axis guide rail (116) extends horizontally, and its two ends are respectively connected to the first Y-axis slider (113) and the second Y-axis slider (114) of the Y-axis motion platform. The X-axis slider (115) is slidably mounted on the X-axis guide rail (116). The X-axis drive unit drives the X-axis slider (115) to perform linear motion along the X-axis guide rail (116). The Z-axis motion platform includes a Z-axis guide rail, a Z-axis slider, and a Z-axis drive unit. The Z-axis guide rail is vertically positioned at the front end of the X-axis slider (115). The Z-axis slider is connected to the detection unit. The Z-axis drive unit drives the Z-axis slider to move up and down along the Z-axis guide rail to adjust the contact pressure between the detection unit and the test electrode.

4. The ultrasonic transducer parameter measurement system according to claim 3, characterized in that, The Y-axis drive unit includes a Y-axis servo motor (16), a ball screw (15), a first coupling (11), and a second coupling (12). The ball screw (15) extends along the Y-axis direction, and its two ends are connected to the screws of the first Y-axis guide rail (13) and the second Y-axis guide rail (14) respectively through the first coupling (11) and the second coupling (12). The Y-axis servo motor (16) is connected to the first coupling (11) or the second coupling (12) to drive the ball screw (15) to rotate and synchronously drive the first Y-axis slider (113) and the second Y-axis slider (114) to perform linear motion through the first coupling (11) and the second coupling (12). The X-axis drive unit includes an X-axis servo motor (17) and a third coupling (117). The X-axis servo motor (17) is connected to the lead screw of the X-axis guide rail (116) through the third coupling (117) to drive the X-axis slider (115) to make linear motion along the X-axis guide rail (116). The Z-axis drive unit includes a Z-axis motor and a gear and rack transmission mechanism. The Z-axis motor is fixed on the Z-axis guide rail (19), and its output shaft is connected to the Z-axis slider through a transmission assembly.

5. A method of using an ultrasonic transducer measuring device, characterized in that, The method is based on the ultrasonic transducer parameter measurement system according to any one of claims 1-4, and includes the following steps: S1. Transducer positioning and loading: Multiple ultrasonic transducers to be tested are loaded into the transducer mass testing fixture (3), and the standardized positioning and batch fixing of the transducers are achieved through the transducer mass testing fixture (3); S2. Automated parameter acquisition: Start the performance parameter automated acquisition device (1), move sequentially to the position of each transducer after positioning according to the preset path, and contact the test electrode of the transducer to acquire multi-dimensional performance parameters; S3. Data transmission and processing: The collected multi-dimensional performance parameters are transmitted to the host computer (2), and the host computer (2) performs similarity calculation on the multi-dimensional performance parameters.

6. The method of using the ultrasonic transducer measuring device according to claim 5, characterized in that, In step S2, the preset path is pre-stored by the programmable controller, including: X-axis motion: The drive detection unit scans the same row of transducers sequentially along the horizontal direction; Y-axis motion: Drive the detection unit to switch to different transducers along the vertical direction; Z-axis movement: Drives the detection unit to rise and fall to adjust the contact pressure with the test electrode.

7. The method of using the ultrasonic transducer measuring device according to claim 5, characterized in that, It also includes the following steps: The system determines whether the parameter testing for the current batch is complete. If it is, it re-initializes and loads the transducer under test. Otherwise, it continues to perform similarity calculation and matching analysis for the current ultrasonic transducer. Once the host computer has matched the similarity of all batches of ultrasonic transducers, the system terminates. Otherwise, it returns to initialization and loading of the transducer under test to continue testing the next batch of ultrasonic transducers until the end.

8. The method of using the ultrasonic transducer measuring device according to claim 5, characterized in that, In step S3, the similarity of multi-dimensional performance parameters is calculated by the host computer (2), specifically including the following steps: S10. Set model objectives: Construct a parameter similarity prediction model based on multivariate regression, and determine the model's predictor variable matrix and response variable; S20. Data preprocessing: Standardize the predicted variable matrix and select initial principal components to eliminate the influence of dimensions; S30. Model Building: Optimize the model by iteratively solving principal components, calculating residuals, and performing cross-validation tests to establish the regression relationship between predictor variables and response variables; S40. Model Output and Interpretation: Based on the regression relationship, output the similarity measurement results of the transducer parameters and analyze the influence weight of each predictor variable on the response variable.

9. The method of using the ultrasonic transducer measuring device according to claim 8, characterized in that, In step S10, the prediction variable matrix includes a set of steady-state characteristic parameters and a set of transient characteristic parameters of the transducer. The set of steady-state characteristic parameters includes resonant frequency, anti-resonant frequency, resonant impedance, anti-resonant impedance, static capacitance and impedance curve. The set of transient characteristic parameters includes echo waveform. The response variables include the transducer's temperature drift parameter or zero-point offset; In step S10, the multivariate regression model includes a partial least squares regression model, which is used to quantify the matching degree of the ultrasonic transducer and predict its temperature drift behavior.

10. The method of using the ultrasonic transducer measuring device according to claim 8, characterized in that, In step S30, the iterative solution of principal components includes iterating the weights and factors of the initial principal components until convergence, calculating the residuals based on the loading matrix of the principal components, and performing the cross-validation test by solving the ratio of the sum of squared prediction errors to the sum of squared error. When the ratio is less than a set threshold, the extraction of principal components is stopped. In step S40, the similarity quantification results include a transducer parameter similarity matrix and predicted values ​​of response variables; the influence weights characterize the contribution of each steady-state / transient parameter to the response variable through regression coefficients.

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