Performance testing device and method for piezoelectric ceramic ring of underwater acoustic transducer

Abstract

The invention belongs to the technical field of piezoelectric ceramic ring detection, and particularly discloses an underwater acoustic transducer piezoelectric ceramic ring performance testing device which comprises a cabinet body, and a feeding assembly, a testing table and a receiving assembly are arranged at the top of the cabinet body; a plurality of detection stations are uniformly arranged on the test bench, a plurality of test heads are arranged on the outer side of the rotary table, the test heads are matched with the detection stations in position, and the test heads are connected with piezoelectric ceramic ring test components and are used for acquiring test parameters; the feeding assembly is used for conveying a piezoelectric ceramic ring to be detected to a detection station; the material collecting assembly comprises a taking part and a collecting part, and the taking part is used for moving the tested piezoelectric ceramic rings from the detection station to the collecting part. According to the testing device, the feeding assembly, the testing table and the material receiving assembly are integrated on the testing working face, so that the testing device is compact in overall structure, automatic feeding detection and automatic material receiving of the piezoelectric ceramic rings are achieved through the arrangement of the feeding assembly and the material receiving assembly, and the testing efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of piezoelectric ceramic ring detection, and in particular relates to a device and method for testing the performance of a piezoelectric ceramic ring of an underwater acoustic transducer. Background Art

[0002] With the rapid development of underwater detection technology, the stability and reliability of the performance of underwater acoustic transducers, as key equipment for underwater communication, detection and positioning, are extremely important. As the core material of underwater acoustic transducers, piezoelectric ceramic rings are mainly used to realize the mutual conversion of electrical signals and acoustic signals during the working process of the transducer. Their performance parameters such as resonant frequency, impedance, capacitance, etc. directly affect the output characteristics and working bandwidth of the underwater acoustic transducer. In the existing batch production and manufacturing process of underwater acoustic transducers, in order to achieve the classified use and optimized matching of ceramic rings in different performance ranges, the parameters such as the resonant frequency, resonance point impedance and capacitance of piezoelectric ceramic rings are mainly tested manually, and the ceramic rings are classified one by one according to the classification rules. When testing traditional piezoelectric ceramic rings, it is necessary to manually place the piezoelectric ceramic rings on the testing station. Since the piezoelectric ceramic rings need to be tested for multiple parameters during testing, they need to be moved to another testing area after one parameter test is completed. The manual testing method is not only inefficient, but also prone to mis-testing and mis-placing, resulting in inaccurate test results. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects in the prior art and provide a performance testing device for a piezoelectric ceramic ring of an underwater acoustic transducer.

[0004] In a first aspect of the present invention, a device for testing the performance of a piezoelectric ceramic ring of an underwater acoustic transducer is provided, comprising a cabinet, an industrial computer and a control module, wherein the interior of the cabinet is used to place piezoelectric ceramic ring test components, and the top of the cabinet is a test working surface; a feeding assembly, a test bench and a receiving assembly are arranged on the test working surface;

[0005] The test bench includes a drive box and a turntable, the drive box is used to drive the turntable to rotate, a plurality of detection stations are evenly arranged on the turntable, and a plurality of test heads are arranged outside the turntable, the test heads are adapted to the positions of the detection stations, and the test heads are connected to the piezoelectric ceramic ring test components to obtain test parameters;

[0006] The feeding assembly is used to deliver the piezoelectric ceramic ring to be tested to the testing station;

[0007] The material receiving assembly comprises a taking part and a collecting part, wherein the taking part is used to move the tested piezoelectric ceramic ring from the testing station to the collecting part;

[0008] The industrial computer is connected to the control module and is used to send test instructions to the control module. The control module is respectively connected to the drive box, the loading assembly, and the receiving assembly; the control module obtains the test instructions of the industrial computer in real time, and the control module sends a control signal based on the test instructions to control the loading assembly to place the piezoelectric ceramic ring to be tested on the detection station, and controls the drive box to rotate at a set speed so that the piezoelectric ceramic ring to be tested on the detection station rotates to the test head to complete the test, and controls the picking part to absorb the piezoelectric ceramic ring that has completed the test and place it in the corresponding collection part.

[0009] A further solution is that the feeding assembly includes a first feeding module and a feeding box, the feeding box is located on the first feeding module, and the first feeding module is used to drive the feeding box to move along the first feeding module;

[0010] A support plate is provided on one side of the first feeding module, a feeding guide rail is provided on one side of the top of the support plate, a driving cylinder is provided on the other side of the top of the support plate, a feeding base is slidably provided on the feeding guide rail, a feeding nozzle is provided at the bottom of the feeding base, one side of the feeding base is connected to the output end of the driving cylinder, and the feeding base slides along the feeding guide rail under the action of the driving cylinder; the position of the feeding nozzle is adapted to the feeding box, and is used to absorb the piezoelectric ceramic ring.

[0011] A further solution is that a plurality of accommodating cavities are provided inside the loading box for placing the piezoelectric ceramic ring to be tested, a second through hole is provided at the bottom of each accommodating cavity, and a first through hole corresponding to the second through hole is provided on the test working surface;

[0012] The feeding assembly further comprises a second feeding module, the second feeding module is located inside the cabinet and fixedly connected to the top of the cabinet, a lifting guide rail is arranged on the second feeding module, a lifting support is slidably arranged on the lifting guide rail, a push rod is vertically arranged on the lifting support, a lifting cylinder is arranged at the bottom of the lifting guide rail, and an output end of the lifting cylinder is connected to the lifting support;

[0013] The position of the push rod is adapted to the first through hole and the second through hole, so that the push rod passes through the first through hole and the second through hole and enters the interior of the accommodating cavity under the action of the lifting cylinder to push the piezoelectric ceramic ring out of the accommodating cavity.

[0014] A further solution is that the picking portion includes a first material receiving bracket arranged on the test working surface, the first material receiving bracket is provided with a first material receiving module, a lifting cylinder is provided on one side of the first material receiving module, and the first material receiving module is used to drive the lifting cylinder to move along the first material receiving module;

[0015] A material receiving arm is disposed at the output end of the lifting cylinder, the material receiving arm is a stepped structure and the end of the material receiving arm is biased toward the turntable;

[0016] A material receiving suction nozzle is arranged at the bottom of the material receiving arm for sucking the piezoelectric ceramic ring.

[0017] A further solution is that the collecting part includes at least two groups of second material receiving brackets arranged on the test working surface, a second material receiving module is arranged on the top of the second material receiving bracket, a material receiving tray is arranged on the second material receiving module, and the second material receiving module is used to drive the material receiving tray to move along the second material receiving module;

[0018] A plurality of short columns are arranged in an array in the receiving tray to limit the position of the piezoelectric ceramic ring.

[0019] A further solution is that three groups of the second material receiving brackets are arranged side by side, each group of the second material receiving brackets is provided with a second material receiving module and a material receiving tray, and the first material receiving module classifies and collects the piezoelectric ceramic rings into the three material receiving trays based on the test results.

[0020] A further solution is that the first receiving module, the second receiving module, the first feeding module, and the second feeding module have the same structure, and all include a module frame, a lead screw and a guide rod are arranged inside the module frame, and a motor is arranged on one side outside the module frame, and the motor is fixed to the module frame through a motor bracket;

[0021] One end of the lead screw is rotatably connected to the inner wall of the module frame through a bearing, and the other end of the lead screw is axially connected to the motor;

[0022] The two ends of the guide rod are respectively fixedly connected to the inner wall of the module frame;

[0023] The lead screw is provided with a slider, which is provided with a transverse threaded hole and at least one through hole, the lead screw passes through the threaded hole and is threadedly connected with the threaded hole, and the guide rod passes through the through hole and is slidably connected with the through hole.

[0024] A further solution is that the piezoelectric ceramic ring test component is an impedance analyzer, and three test heads are provided, namely an impedance analysis test head, a digital bridge test head and an insulation resistance test head, which are used to test the resonant frequency, impedance and capacitance parameters of the piezoelectric ceramic ring.

[0025] A second aspect of the present invention provides a method for testing the performance of a piezoelectric ceramic ring of an underwater acoustic transducer, using the above-mentioned testing device, comprising the following steps:

[0026] The industrial computer sends a test instruction to the control module, and the control module drives the loading assembly to deliver the piezoelectric ceramic ring to be tested to the test area of ​​the test bench;

[0027] The control module controls the test bench to rotate to a set angle so that the piezoelectric ceramic ring to be tested enters the test area of ​​the test head;

[0028] The piezoelectric ceramic ring test component tests the piezoelectric ceramic ring to be tested and obtains the test parameters;

[0029] The control module classifies the piezoelectric ceramic rings based on the test parameters and drives the picking part to absorb the piezoelectric ceramic rings that have completed the test and place them in the corresponding collection part;

[0030] After the set number of piezoelectric ceramic rings are tested and classified, the control module controls the test device to stop running, and the operator performs cleaning and maintenance work to prepare for the next test.

[0031] A further solution is that before the control module drives the loading assembly, the piezoelectric ceramic ring to be tested is manually loaded into the loading box with the positive electrode facing upward, and the loading box is placed on the first loading module;

[0032] The process of testing the piezoelectric ceramic ring to be tested by the piezoelectric ceramic ring test component includes:

[0033] The test bench rotates to the impedance analysis test head test area to test the impedance characteristic parameters of the ceramic ring; the test bench rotates to the digital bridge test head test area to test the capacitance and loss of the ceramic ring; the test bench rotates to the insulation resistance test head test area to test the insulation resistance.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The present invention places the piezoelectric ceramic ring test components inside the cabinet, and integrates the feeding assembly, the test bench and the receiving assembly on the test work surface, so that the overall structure of the test device is compact. Through the arrangement of the feeding assembly and the receiving assembly, automatic feeding detection and automatic receiving of the piezoelectric ceramic ring are realized, which improves the test efficiency, reduces manual intervention and waiting time, and also improves the accuracy of the test, ensuring the reliability of the test results.

[0036] The present invention uses piezoelectric ceramic ring test components and multiple test heads to test piezoelectric ceramic rings, obtain test parameters, and classify piezoelectric ceramic rings according to the test parameters. The first material receiving module classifies and collects the piezoelectric ceramic rings in the three material receiving trays based on the test results, thereby reducing the labor cost and material waste in the transducer manufacturing process, thereby reducing production costs. In addition, through automatic testing and precise classification of piezoelectric ceramic ring performance, the foundation is laid for the optimal selection of ceramic rings in the transducer assembly process, ensuring that the underwater acoustic transducer has high overall quality performance and consistency. Operators can set classification standards according to actual needs to meet the needs of different performance ranges and different classification rules for different products. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The following drawings are only used to illustrate and explain the present invention, and are not intended to limit the scope of the present invention, wherein:

[0038] Figure 1 : Schematic diagram of the structure of the present invention;

[0039] Figure 2 : Schematic diagram of the setting position of the second feeding module;

[0040] Figure 3 : Schematic diagram of the feeding box structure;

[0041] Figure 4 : Schematic diagram of the material receiving and loading module structure;

[0042] In the figure: 1. cabinet; 2. first material receiving bracket; 3. first material receiving module; 4. second material receiving bracket; 5. second material receiving module; 6. turntable; 7. drive box; 8. detection station; 9. test head; 10. first feeding module; 11. drive cylinder; 12. first support plate; 13. feeding box; 14. material receiving arm; 15. material receiving nozzle; 16. feeding nozzle; 17. feeding guide rail; 18. feeding base; 19. material receiving tray; 20. lifting cylinder; 21. lifting guide rail; 22. lifting cylinder; 23. ejector rod; 24. second feeding module; 25. first through hole; 26. accommodating cavity; 27. second through hole; 28. module frame; 29. ​​lead screw; 30. guide rod; 31. slider; 32. motor. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution, design method and advantages of the present invention clearer, the present invention is further described in detail by specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] Example 1

[0045] like Figure 1As shown, the present invention provides a performance test device for a piezoelectric ceramic ring of an underwater acoustic transducer, comprising a cabinet 1, wherein the cabinet 1 is used to place a piezoelectric ceramic ring test component, wherein the piezoelectric ceramic ring test component is a high-precision impedance analyzer; the top of the cabinet 1 is a test work surface; the test work surface is provided with a feeding assembly, a test bench and a receiving assembly; specifically, the test bench comprises a drive box 7 and a turntable 6, wherein the drive box 7 is used to drive the turntable 6 to rotate, and in this embodiment, the drive box 7 can be driven by a drive motor to drive the turntable 6 to rotate at a set speed. Six detection stations 8 are evenly arranged on the turntable 6, and three test heads 9 are arranged outside the turntable 6, and the center angle of two adjacent test heads 9 is 60°, wherein the test heads 9 are adapted to the positions of the detection stations 8, and the test heads 9 are connected to the piezoelectric ceramic ring test component to obtain test parameters, and in this embodiment, the three test heads 9 are respectively an impedance analysis test head, a digital bridge test head and an insulation resistance test head, which are used to test the resonant frequency, impedance, capacitance and other parameters of the piezoelectric ceramic ring.

[0046] The feeding assembly includes a first feeding module 10 and a feeding box 13, wherein the feeding box 13 is located on the first feeding module 10, and the first feeding module 10 is used to drive the feeding box 13 to move along the first feeding module 10; a support plate 12 is provided on one side of the first feeding module 10, a feeding guide rail 17 is provided on one side of the top of the support plate 12, a driving cylinder 11 is provided on the other side of the top of the support plate 12, a feeding base 18 is slidably provided on the feeding guide rail 17, a feeding nozzle 16 is provided at the bottom of the feeding base 18, one side of the feeding base 18 is connected to the output end of the driving cylinder 11, and the feeding base 18 slides along the feeding guide rail 17 under the action of the driving cylinder 11; the position of the feeding nozzle 16 is adapted to the feeding box 13, and is used to absorb piezoelectric ceramic rings. Figure 3 As shown, the loading box 13 is provided with a plurality of accommodating cavities 26 for placing the piezoelectric ceramic ring to be tested, and each of the accommodating cavities 26 has a second through hole 27 at the bottom. Figure 2As shown, a first through hole 25 corresponding to the second through hole 27 is opened on the test working surface; the loading assembly also includes a second loading module 24, the second loading module 24 is located inside the cabinet 1 and is fixedly connected to the top of the cabinet 1, a lifting guide rail 21 is arranged on the second loading module 24, a lifting support is slidably arranged on the lifting guide rail 21, a push rod 23 is vertically arranged on the lifting support, a lifting cylinder 22 is arranged at the bottom of the lifting guide rail 21, and the output end of the lifting cylinder 22 is connected to the lifting support; the position of the push rod 23 is adapted to the first through hole 25 and the second through hole 27, so that the push rod 23 passes through the first through hole 25 and the second through hole 27 under the action of the lifting cylinder 22 and enters the interior of the accommodating cavity 26, and the piezoelectric ceramic ring is ejected from the accommodating cavity 26, and the loading nozzle 16 adsorbs the piezoelectric ceramic ring ejected from the accommodating cavity 26 and moves it to the detection station 8.

[0047] In the above, the material receiving assembly includes a picking part and a collecting part, the picking part includes a first material receiving bracket 2 arranged on the test working surface, the first material receiving bracket 2 is provided with a first material receiving module 3, a lifting cylinder 20 is provided on one side of the first material receiving module 3, the first material receiving module 3 is used to drive the lifting cylinder 20 to move along the first material receiving module 3; the output end of the lifting cylinder 20 is provided with a material receiving arm 14, the material receiving arm 14 is a stepped structure and the end of the material receiving arm 14 is biased toward the turntable 6; the bottom of the material receiving arm 14 is provided with a material receiving nozzle 15 for sucking the piezoelectric ceramic ring. In this embodiment, the material receiving nozzle 15 and the material loading nozzle 16 are both industrial vacuum nozzles in the prior art, the nozzle head is round, and rubber or silicone material is selected. When the round nozzle is connected to a negative pressure generating device (such as a vacuum pump, a vacuum generator, etc.) and started, the negative pressure generating device will quickly extract the air inside the nozzle, so that the air pressure inside the nozzle is reduced to form a negative pressure environment. Since there is a pressure difference between the inside of the suction nozzle and the outside atmosphere, the outside atmospheric pressure will be greater than the pressure inside the suction nozzle. As the air inside the suction nozzle is continuously extracted, the pressure difference between the suction nozzle and the surface of the object further increases, and the outside atmospheric pressure will press the object tightly against the adsorption surface of the suction nozzle, thereby achieving adsorption and fixation of the piezoelectric ceramic ring. The collecting part includes at least two groups of second material receiving brackets 4 arranged on the test working surface, and a second material receiving module 5 is arranged on the top of the second material receiving bracket 4. A material receiving tray 19 is arranged on the second material receiving module 5, and the second material receiving module 5 is used to drive the material receiving tray 19 to move along the second material receiving module 5; a plurality of short columns are arranged in an array in the material receiving tray 19 to limit the position of the piezoelectric ceramic ring.

[0048] In order to achieve the classified collection of piezoelectric ceramic rings with different parameters, in the present embodiment, three groups of second material receiving brackets 4 are arranged side by side, each group of second material receiving brackets 4 is provided with a second material receiving module 5 and a material receiving tray 19, and the first material receiving module 3 classifies and collects the piezoelectric ceramic rings into the three material receiving trays 19 based on the test results.

[0049] In the present embodiment, the first receiving module 3, the second receiving module 5, the first feeding module 10 and the second feeding module 24 have the same structure and all include a module frame 28, wherein a lead screw 29 and a guide rod 30 are arranged inside the module frame 28, and a motor 32 is arranged on one side of the outside of the module frame 28, and the motor 32 is fixed to the module frame 28 through a motor bracket; one end of the lead screw 29 is rotatably connected to the inner wall of the module frame 28 through a bearing, and the other end of the lead screw 29 is axially connected to the motor 32; the two ends of the guide rod 30 are respectively fixedly connected to the inner wall of the module frame 28; a slider 31 is arranged on the lead screw 29, and the slider 31 is provided with a transverse threaded hole and at least one through hole, the lead screw 29 passes through the threaded hole and is threadedly connected to the threaded hole, and the guide rod 30 passes through the through hole and is slidably connected to the through hole.

[0050] Embodiment 2, based on embodiment 1, in this embodiment, the driving box (7), the feeding assembly, and the receiving assembly are respectively connected to the connection control module, and the control module is connected to the host computer, so as to send a test instruction to the control module. Specifically, the control module is respectively connected to the driving box 7, the first receiving module 3, the second receiving module 5, the first feeding module 10, the driving cylinder 11, the receiving nozzle 15, the feeding nozzle 16, the lifting cylinder 20, the lifting cylinder 22, and the second feeding module 24. Based on this, this embodiment provides a method for testing the performance of a piezoelectric ceramic ring of an underwater acoustic transducer, comprising the following steps:

[0051] The industrial computer sends a test instruction to the control module, and the control module drives the loading assembly to deliver the piezoelectric ceramic ring to be tested to the test area of ​​the test bench;

[0052] The control module controls the test bench to rotate to a set angle so that the piezoelectric ceramic ring to be tested enters a test area of ​​the test head (9);

[0053] The piezoelectric ceramic ring test component tests the piezoelectric ceramic ring to be tested and obtains the test parameters;

[0054] The control module classifies the piezoelectric ceramic rings based on the test parameters and drives the picking part to absorb the piezoelectric ceramic rings that have completed the test and place them in the corresponding collection part;

[0055] After the set number of piezoelectric ceramic rings are tested and classified, the control module controls the test device to stop running, and the operator performs cleaning and maintenance work to prepare for the next test.

[0056] Before the control module drives the loading assembly, the piezoelectric ceramic ring to be tested is manually loaded into a loading box (13) with the positive electrode facing upward, and the loading box (13) is placed on the first loading module (10);

[0057] The process of testing the piezoelectric ceramic ring to be tested by the piezoelectric ceramic ring test component includes:

[0058] The test bench rotates to the impedance analysis test head test area to test the impedance characteristic parameters of the ceramic ring; the test bench rotates to the digital bridge test head test area to test the capacitance and loss of the ceramic ring; the test bench rotates to the insulation resistance test head test area to test the insulation resistance.

[0059] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A device for testing the performance of a piezoelectric ceramic ring of an underwater acoustic transducer, comprising a cabinet (1), an industrial computer and a control module, wherein the interior of the cabinet (1) is used to place piezoelectric ceramic ring test components, and the top of the cabinet (1) is a test working surface; characterized in that: The test working surface is provided with a feeding assembly, a test bench and a receiving assembly; The test bench comprises a drive box (7) and a turntable (6), wherein the drive box (7) is used to drive the turntable (6) to rotate, a plurality of detection stations (8) are evenly arranged on the turntable (6), and a plurality of test heads (9) are arranged outside the turntable (6), wherein the test heads (9) are adapted to the positions of the detection stations (8), and the test heads (9) are connected to the piezoelectric ceramic ring test component to obtain test parameters; The loading assembly is used to deliver the piezoelectric ceramic ring to be tested to the testing station (8); The material receiving assembly comprises a taking part and a collecting part, wherein the taking part is used to move the tested piezoelectric ceramic ring from the testing station to the collecting part; The industrial computer is connected to the control module and is used to send a test instruction to the control module. The control module is respectively connected to the drive box (7), the loading assembly, and the receiving assembly; the control module obtains the test instruction of the industrial computer in real time, and sends a control signal based on the test instruction to control the loading assembly to place the piezoelectric ceramic ring to be tested on the detection station (8), and controls the drive box (7) to rotate at a set speed so that the piezoelectric ceramic ring to be tested on the detection station (8) rotates to the test head (9) to complete the test, and controls the picking part to absorb the piezoelectric ceramic ring that has completed the test and place it in the corresponding collection part.

2. The device for testing the performance of a piezoelectric ceramic ring of an underwater acoustic transducer according to claim 1, characterized in that: The feeding assembly comprises a first feeding module (10) and a feeding box (13), wherein the feeding box (13) is located on the first feeding module (10), and the first feeding module (10) is used to drive the feeding box (13) to move along the first feeding module (10); A support plate (12) is provided on one side of the first feeding module (10), a feeding guide rail (17) is provided on one side of the top of the support plate (12), a driving cylinder (11) is provided on the other side of the top of the support plate (12), a feeding base (18) is slidably provided on the feeding guide rail (17), a feeding nozzle (16) is provided at the bottom of the feeding base (18), one side of the feeding base (18) is connected to the output end of the driving cylinder (11), and under the action of the driving cylinder (11), the feeding base (18) slides along the feeding guide rail (17); the position of the feeding nozzle (16) is adapted to the feeding box (13) and is used to absorb the piezoelectric ceramic ring.

3. The device for testing the performance of a piezoelectric ceramic ring of an underwater acoustic transducer according to claim 2, characterized in that: The loading box (13) is provided with a plurality of accommodating cavities (26) for placing the piezoelectric ceramic ring to be tested, each accommodating cavity (26) is provided with a second through hole (27) at the bottom, and the testing working surface is provided with a first through hole (25) corresponding to the second through hole (27); The loading assembly further comprises a second loading module (24), the second loading module (24) being located inside the cabinet (1) and fixedly connected to the top of the cabinet (1), a lifting guide rail (21) being arranged on the second loading module (24), a lifting support being slidably arranged on the lifting guide rail (21), a push rod (23) being vertically arranged on the lifting support, a lifting cylinder (22) being arranged at the bottom of the lifting guide rail (21), and an output end of the lifting cylinder (22) being connected to the lifting support; The position of the push rod (23) is adapted to the first through hole (25) and the second through hole (27), so that the push rod (23) can penetrate the first through hole (25) and the second through hole (27) and enter the interior of the accommodating cavity (26) under the action of the lifting cylinder (22), thereby pushing the piezoelectric ceramic ring out of the accommodating cavity (26).

4. The device for testing the performance of a piezoelectric ceramic ring of an underwater acoustic transducer according to claim 3, characterized in that: The picking portion comprises a first material receiving support (2) arranged on the test working surface, a first material receiving module (3) is arranged on the first material receiving support (2), a lifting cylinder (20) is arranged on one side of the first material receiving module (3), and the first material receiving module (3) is used to drive the lifting cylinder (20) to move along the first material receiving module (3); The output end of the lifting cylinder (20) is provided with a material receiving arm (14), the material receiving arm (14) is a stepped structure and the end of the material receiving arm (14) is biased toward the turntable (6); The bottom of the material collecting arm (14) is provided with a material collecting nozzle (15) for sucking the piezoelectric ceramic ring.

5. The device for testing the performance of a piezoelectric ceramic ring of an underwater acoustic transducer according to claim 4, characterized in that: The collecting part comprises at least two groups of second material receiving brackets (4) arranged on the test working surface, a second material receiving module (5) is arranged on the top of the second material receiving bracket (4), a material receiving tray (19) is arranged on the second material receiving module (5), and the second material receiving module (5) is used to drive the material receiving tray (19) to move along the second material receiving module (5); A plurality of short columns are arranged in an array in the receiving tray (19) and are used to define the position of the piezoelectric ceramic ring.

6. The device for testing the performance of a piezoelectric ceramic ring of an underwater acoustic transducer according to claim 5, characterized in that: The second material receiving brackets (4) are arranged in three groups side by side, and each group of the second material receiving brackets (4) is provided with a second material receiving module (5) and a material receiving tray (19). The first material receiving module (3) classifies and collects the piezoelectric ceramic rings in the three material receiving trays (19) based on the test results.

7. The device for testing the performance of a piezoelectric ceramic ring of an underwater acoustic transducer according to claim 6, characterized in that: The first receiving module (3), the second receiving module (5), the first feeding module (10), and the second feeding module (24) have the same structure, and all include a module frame (28), a lead screw (29) and a guide rod (30) are arranged inside the module frame (28), and a motor (32) is arranged on one side of the outside of the module frame (28), and the motor (32) is fixed to the module frame (28) via a motor bracket; One end of the lead screw (29) is rotatably connected to the inner wall of the module frame (28) via a bearing, and the other end of the lead screw (29) is axially connected to the motor (32); Both ends of the guide rod (30) are respectively fixedly connected to the inner wall of the module frame (28); The lead screw (29) is provided with a slider (31), the slider (31) is provided with a transverse threaded hole and at least one through hole, the lead screw (29) passes through the threaded hole and is threadedly connected to the threaded hole, and the guide rod (30) passes through the through hole and is slidably connected to the through hole.

8. The device for testing the performance of a piezoelectric ceramic ring of an underwater acoustic transducer according to claim 1, characterized in that: The piezoelectric ceramic ring test component is an impedance analyzer, and the test head (9) is provided with three, namely an impedance analysis test head, a digital bridge test head and an insulation resistance test head, which are used to test the resonant frequency, impedance and capacitance parameters of the piezoelectric ceramic ring.

9. A method for testing the performance of a piezoelectric ceramic ring of an underwater acoustic transducer, characterized in that: The test device according to any one of claims 1 to 8 is used, comprising the following steps: The industrial computer sends a test command to the control module, and the control module drives the loading assembly to deliver the piezoelectric ceramic ring to be tested to the test area of ​​the test bench; The control module controls the test bench to rotate to a set angle so that the piezoelectric ceramic ring to be tested enters a test area of ​​the test head (9); The piezoelectric ceramic ring test component tests the piezoelectric ceramic ring to be tested and obtains the test parameters; The control module classifies the piezoelectric ceramic rings based on the test parameters and drives the picking part to absorb the piezoelectric ceramic rings that have completed the test and place them in the corresponding collection part; After the set number of piezoelectric ceramic rings are tested and classified, the control module controls the test device to stop running, and the operator performs cleaning and maintenance work to prepare for the next test.

10. The method for testing the performance of a piezoelectric ceramic ring of an underwater acoustic transducer according to claim 1, characterized in that: Before the control module drives the loading assembly, the piezoelectric ceramic ring to be tested is manually loaded into a loading box (13) with the positive electrode facing upward, and the loading box (13) is placed on the first loading module (10); The process of testing the piezoelectric ceramic ring to be tested by the piezoelectric ceramic ring test component includes: The test bench rotates to the impedance analysis test head test area to test the impedance characteristic parameters of the ceramic ring; the test bench rotates to the digital bridge test head test area to test the capacitance and loss of the ceramic ring; the test bench rotates to the insulation resistance test head test area to test the insulation resistance.

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