A high-precision ultrasonic sound field testing device

Abstract

The utility model provides a kind of high-precision ultrasonic sound field testing device, it includes water tank, ultrasonic sound field generator, composite piezoelectric ceramic sensor, data acquisition card, signal source and amplifier and processing module.Ultrasonic sound field generator and composite piezoelectric ceramic sensor are both set in the water tank with water, and the latter is below the former.Composite piezoelectric ceramic sensor includes receiving surface, receiving surface is obliquely arranged, and a plurality of single piezoelectric ceramics are arranged on receiving surface, and a plurality of single piezoelectric ceramics are arranged in matrix, single piezoelectric ceramic receives ultrasonic wave emitted by ultrasonic sound field generator, and ultrasonic wave is reflected to the tank wall of water tank.Data acquisition card is electrically connected to composite piezoelectric ceramic sensor.Signal source and amplifier are electrically connected to ultrasonic sound field generator.Processing module is electrically connected to signal source and amplifier and data acquisition card.The high-precision ultrasonic sound field testing device of the utility model, receiving surface is obliquely arranged, and measurement accuracy and measurement accuracy can be improved.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic sound field testing technology, and in particular to a high-precision ultrasonic sound field testing device. Background Technology

[0002] Medical ultrasound sound field testing primarily targets the sound field of ultrasound frequencies between 1MHz and 10MHz in the medical field, and it holds immense significance in this area. In equipment development and quality control, it optimizes equipment design by understanding the propagation characteristics and distribution of ultrasound waves in different media. This allows for the optimization of parameters such as probe shape, size, and transmission frequency, improving imaging quality and treatment efficacy. Furthermore, it ensures stable equipment performance: sound field testing monitors key performance indicators of ultrasound equipment, such as ultrasonic power, intensity, and frequency, ensuring stable and accurate output that meets safety and quality standards, reducing the risk of misdiagnosis and mistreatment due to equipment performance issues. In clinical diagnosis and treatment, it improves diagnostic accuracy and ensures the safety and effectiveness of treatment.

[0003] In existing technologies, fiber optic hydrophones are used for ultrasonic sound field testing. A single fiber optic hydrophone is mounted on the emitting surface directly opposite the ultrasonic sound field. To eliminate interference from the sensor itself during the ultrasonic sound field test, the size of a single fiber optic hydrophone must be much smaller than the wavelength of the ultrasonic wave being measured. For example, the diameter of the fiber optic hydrophone sensor head is only on the order of ten micrometers. Such tiny fiber optic sensors are difficult to install, debug, use, maintain, and periodically adjust. In particular, the fit of the fiber optic connectors during the service life can easily cause signal attenuation or even open circuit damage, seriously affecting the reliability and accuracy of the test.

[0004] Therefore, it is necessary to provide a high-precision ultrasonic sound field testing device to solve the above-mentioned technical problems. Utility Model Content

[0005] This invention provides a high-precision ultrasonic sound field testing device, which can improve measurement accuracy and precision.

[0006] The technical solution of this utility model is as follows: A high-precision ultrasonic sound field testing device, comprising: A water tank is used to hold water; An ultrasonic sound field generator is disposed in the water tank; A composite piezoelectric ceramic sensor is disposed in the water tank and located below the ultrasonic sound field generator. The composite piezoelectric ceramic sensor includes a receiving surface, which is inclined. Multiple individual piezoelectric ceramics are disposed on the receiving surface and arranged in a matrix. The individual piezoelectric ceramics are used to receive ultrasonic waves emitted by the ultrasonic sound field generator and reflect the ultrasonic waves to the wall of the water tank. A data acquisition card is disposed outside the water tank and electrically connected to the composite piezoelectric ceramic sensor. The output end of the data acquisition card is provided with a serial port and / or a USB interface. A signal source and amplifier, electrically connected to the ultrasonic sound field generator; and, The processing module is electrically connected to the signal source and amplifier, and is electrically connected to the data acquisition card through the serial port or the USB interface.

[0007] In the high-precision ultrasonic sound field testing device of this utility model, the inner wall of the water tank is provided with sound-absorbing material.

[0008] In the high-precision ultrasonic sound field testing device of this utility model, epoxy adhesive is provided at the individual piezoelectric ceramic, and adjacent individual piezoelectric ceramics are bonded and isolated by the epoxy adhesive.

[0009] The high-precision ultrasonic sound field testing device of this utility model further includes an FPC flexible flat cable data line, the two ends of which are respectively connected to the data acquisition card and the composite piezoelectric ceramic sensor.

[0010] In the high-precision ultrasonic sound field testing device of this invention, the angle between the receiving surface and the ultrasonic wave emitted by the ultrasonic sound field generator is 45°.

[0011] In the high-precision ultrasonic sound field testing device of this utility model, the composite piezoelectric ceramic sensor is disposed at the bottom of the water tank, and the receiving surface is square, with its bottom edge parallel to one bottom edge of the water tank.

[0012] In the high-precision ultrasonic sound field testing device of this utility model, the receiving surface is set to one.

[0013] In the high-precision ultrasonic sound field testing device of this utility model, there are two receiving surfaces, and the two receiving surfaces are perpendicular to each other.

[0014] In the high-precision ultrasonic sound field testing device of this utility model, a linear gap is formed between the two receiving surfaces, and the linear gap is filled with epoxy resin; a linear moving mechanism is provided at the bottom of the composite piezoelectric ceramic sensor, and the linear moving mechanism is used to drive the composite piezoelectric ceramic sensor to move along the arrangement direction of the two receiving surfaces.

[0015] The high-precision ultrasonic sound field testing device of this utility model further includes a vacuum system and a temperature detection and control system, both of which are connected to the water tank and electrically connected to the processing module.

[0016] Compared to existing technologies, the advantages of this invention are as follows: In the high-precision ultrasonic sound field testing device, water is placed in a tank during operation. The processing module controls the signal source and amplifier. The ultrasonic waves emitted by the ultrasonic sound field generator strike the individual piezoelectric ceramics. The individual piezoelectric ceramics, through their own effects, convert the ultrasonic waves into electrical signals. The stronger the sound field, the greater the voltage amplitude of the generated electrical signal, while the frequency of the electrical signal remains constant. The test data is then output to the processing module via a data acquisition card. The processing module processes the test data and displays the test results. The inclined receiving surface of the composite piezoelectric ceramic sensor increases the area of ​​the receiving surface, allowing for the arrangement of more individual piezoelectric ceramics and improving measurement accuracy. Furthermore, it reflects the ultrasonic waves to the tank wall, preventing the ultrasonic waves from being reflected back to the ultrasonic sound field generator and affecting measurement accuracy. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of this utility model.

[0018] Figure 1 A schematic diagram of the structure of the high-precision ultrasonic sound field testing device provided in the first preferred embodiment of this utility model.

[0019] Figure 2 A schematic diagram of the structure of a single piezoelectric ceramic in the high-precision ultrasonic sound field testing device provided in the first preferred embodiment of this utility model.

[0020] Figure 3 A schematic diagram of the composite piezoelectric ceramic sensor of the high-precision ultrasonic sound field testing device provided in the first preferred embodiment of this utility model.

[0021] Figure 4 A partial structural schematic diagram of the receiving surface of the high-precision ultrasonic sound field testing device provided in the first preferred embodiment of this utility model.

[0022] Figure 5 A schematic diagram of the structure of the high-precision ultrasonic sound field testing device provided in the second preferred embodiment of this utility model.

[0023] Figure 6 A schematic diagram of the composite piezoelectric ceramic sensor of the high-precision ultrasonic sound field testing device provided in the second preferred embodiment of this utility model.

[0024] in, Figures 1-3 The identifier is as follows: 11. Water tank; 111. Sound-absorbing material. 12. Ultrasonic sound field generator. 13. Composite piezoelectric ceramic sensor, 131. Receiving surface, 132. Single-cell piezoelectric ceramic; 1321. First conductive coating; 1322. First silver-plated electrode; 1323. Piezoelectric ceramic body; 1324. Second silver-plated electrode; 1325. Second conductive coating; 1326. First lead; 1327. Second lead. 133. Epoxy adhesive 14. Data acquisition card, 15. Signal source and amplifier 16. Processing module 17. Vacuum system, 18. Temperature detection and control system.

[0025] Figure 5 and Figure 6 The identifier is as follows: 21. Ultrasonic sound field generator. 22. Composite piezoelectric ceramic sensor, 221. Receiving surface; 222. Linear slit; 23. Sink, 24. Linear movement mechanism.

[0026] In the diagram, units with similar structures are represented by the same labels. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] The directional terms mentioned in this utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this utility model, and are not intended to limit this utility model.

[0029] The terms "first" and "second" in this utility model are used for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as a restriction on the order of events.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The existing technology uses fiber optic hydrophones for ultrasonic sound field testing, which has problems with testing reliability and accuracy.

[0032] The following is a preferred embodiment of a high-precision ultrasonic sound field testing device provided by this utility model that can solve the above-mentioned technical problems.

[0033] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4The first preferred embodiment of this utility model provides a high-precision ultrasonic sound field testing device, which includes a water tank 11, an ultrasonic sound field generator 12, a composite piezoelectric ceramic sensor 13, a data acquisition card 14, a signal source and amplifier 15, and a processing module 16. The water tank 11 is used to hold water. The ultrasonic sound field generator 12 is disposed in the water tank 11. The composite piezoelectric ceramic sensor 13 is disposed in the water tank 11 and located below the ultrasonic sound field generator 12. The composite piezoelectric ceramic sensor 13 includes a receiving surface 131, which is inclined. Multiple individual piezoelectric ceramics 132 are disposed on the receiving surface 131, arranged in a matrix. The individual piezoelectric ceramics 132 are used to receive the ultrasonic waves emitted by the ultrasonic sound field generator 12 and reflect the ultrasonic waves to the wall of the water tank 11. The data acquisition card 14 is disposed outside the water tank 11 and electrically connected to the composite piezoelectric ceramic sensor 13. The output end of the data acquisition card is provided with a serial port and / or a USB interface. The signal source and amplifier 15 is electrically connected to the ultrasonic sound field generator 12. The processing module 16 is electrically connected to the signal source and amplifier 15, and is also electrically connected to the data acquisition card 14 via a serial port or USB interface. The serial port or USB interface offers greater versatility.

[0034] This high-precision ultrasonic sound field testing device operates by filling a water tank 11 with water. The processing module 16 controls the signal source and amplifier 15 to operate. The ultrasonic waves emitted by the ultrasonic sound field generator 12 strike the individual piezoelectric ceramics 132. The individual piezoelectric ceramics 132, through their own effect, convert the ultrasonic waves into electrical signals. The stronger the sound field, the greater the voltage amplitude of the generated electrical signal, while the frequency of the electrical signal remains constant. The test data is then output to the processing module 16 via the data acquisition card 14. The processing module 16 processes the test data and displays the test results. The receiving surface 131 of the composite piezoelectric ceramic sensor 13 is tilted. This increases the area of ​​the receiving surface 131, allowing for the arrangement of more individual piezoelectric ceramics 132, thus improving measurement accuracy. Furthermore, it reflects the ultrasonic waves to the wall of the water tank 11, preventing the ultrasonic waves from being reflected back to the ultrasonic sound field generator 12 via the receiving surface 131, which would affect measurement accuracy.

[0035] The processing module 16 can be a computer to control the operation of the signal source and amplifier 15 and the data acquisition card 14, and output and display the ultrasonic power test results.

[0036] The high-precision ultrasonic sound field testing device also includes an FPC flexible flatbed data cable, whose two ends are connected to the data acquisition card 14 and the composite piezoelectric ceramic sensor 13, respectively. The FPC flexible flatbed data cable has high flexibility and plasticity, as well as excellent electrical properties and heat resistance, which can improve the performance of the entire device.

[0037] Please refer to Figure 1The inner wall of the water tank 11 is provided with sound-absorbing material 111, which can absorb the ultrasonic waves reflected by the receiving surface 131 and prevent them from being reflected back to the receiving surface 131, thus ensuring the accuracy of the test.

[0038] Please refer to Figure 4 An epoxy resin 133 is applied to each individual piezoelectric ceramic 132, and adjacent individual piezoelectric ceramics 132 are bonded and isolated by the epoxy resin 133. The epoxy resin 133 can completely absorb ultrasonic waves and will not produce secondary reflections, thereby improving the accuracy of the test. The insulation performance of the epoxy resin 133 must ensure an insulation capacity of 3000Vdc for 60s between two adjacent individual piezoelectric ceramics 132, with a leakage current not exceeding 1mA.

[0039] Please refer to Figure 2 The single-unit piezoelectric ceramic 132 includes a first conductive plating layer 1321, a first silver-plated electrode 1322, a piezoelectric ceramic body 1323, a second silver-plated electrode 1324, and a second conductive plating layer 1325, stacked sequentially. The first conductive plating layer 1321 is connected to a first lead 1326, and the second conductive plating layer 1325 is connected to a second lead 1327. Both the first lead 1326 and the second lead 1327 are passed through epoxy resin 133 and are isolated from the first silver-plated electrode 1322 and the second silver-plated electrode 1324. This structure avoids electrical connection between the first lead 1326 and the second lead 1327, thus preventing short circuits.

[0040] In this embodiment, the first conductive plating layer 1321 is located on the receiving surface 131 and the two are parallel. The first lead-out line 1326 is the positive electrode and the second lead-out line 1327 is the negative electrode.

[0041] Please refer to Figure 1 The angle A between the receiving surface 131 and the ultrasonic wave emitted by the ultrasonic field generator 12 is 45°. The ultrasonic wave emitted by the ultrasonic field generator 12 strikes the receiving surface 131 of the composite piezoelectric ceramic sensor 13 vertically downwards, and is totally reflected horizontally, without being reflected back to the ultrasonic field generator 12 above, thus improving the accuracy of the test.

[0042] Please continue to refer to Figure 1 The water tank 11 is rectangular, and the composite piezoelectric ceramic sensor 13 is disposed at the bottom of the water tank 11. The receiving surface 131 is square, and its bottom edge is parallel to one bottom edge of the water tank 11. By adopting the above structure, the space inside the water tank 11 can be fully utilized.

[0043] The back of the composite piezoelectric ceramic sensor 13 is filled with sound-absorbing material, making the composite piezoelectric ceramic sensor 13 triangular in shape, forming a triangular single-sided cone target, so as to facilitate the installation of the composite piezoelectric ceramic sensor 13 into the water tank 11. The sound-absorbing material can absorb ultrasonic waves, further ensuring the accuracy of the test.

[0044] Please refer to Figure 1 and Figure 3 The receiving surface 131 is configured as one to facilitate the arrangement of individual piezoelectric ceramics 132, so that individual piezoelectric ceramics 132 can be placed at various locations on the receiving surface 131, thereby enabling the composite piezoelectric ceramic sensor 13 to receive ultrasonic waves emitted by the ultrasonic field generator 12 at various locations.

[0045] Please refer to Figure 1 The high-precision ultrasonic sound field testing device also includes a vacuum system 17 and a temperature detection and control system 18, both of which are connected to the water tank 11 and electrically connected to the processing module 16. To reduce the temperature rise caused by the heat generated by the ultrasonic sound field generator 12, the composite piezoelectric ceramic sensor 13 needs to operate in degassed water. The vacuum system 17 can effectively remove air bubbles from the water. The temperature detection and control system 18 can monitor and control the water temperature in real time to ensure the normal operation of the composite piezoelectric ceramic sensor 13.

[0046] The distance between the top of the composite piezoelectric ceramic sensor 13 and the ultrasonic sound field generator 12 needs to be greater than 70mm.

[0047] Working principle of the high-precision ultrasonic sound field testing device of the first preferred embodiment of this utility model: During operation, water is filled into the water tank 11, and air bubbles are effectively removed through the vacuum system 17, while an antifoaming agent is added to the water. The water temperature is monitored and controlled in real time by the temperature detection and control system 18. The processing module 16 controls the signal source and amplifier 15 to operate. The ultrasonic waves emitted by the ultrasonic field generator 12 strike the composite piezoelectric ceramic sensor 13 vertically downwards. The individual piezoelectric ceramics 132 on the receiving surface 131 receive the ultrasonic waves emitted by the ultrasonic field generator 12, and simultaneously perform total reflection in the horizontal direction, preventing secondary reflection back to the ultrasonic field generator 12 above. The epoxy resin 133 on the receiving surface 131 completely absorbs the ultrasonic waves, preventing secondary reflection. The test data is output to the processing module 16 through the data acquisition card 14, and the processing module 16 processes the test data and displays the test results.

[0048] The purpose of this invention is to detect the ultrasonic power distribution at a distance of approximately 200mm from an ultrasonic radiation source, for example, at a distance of 100-250mm from the ultrasonic radiation source, within a range of 500mm*200mm. The overall dimensions of the triangular single-sided cone target of the composite piezoelectric ceramic sensor 13 are consistent with the detection range, that is, the length is approximately 500mm and the width is approximately 200mm. In this embodiment, 32*16 individual piezoelectric ceramics can be arranged within a range of 500mm*200mm, thereby testing the ultrasonic power distribution at 16*32=512 test points, that is, there are 512 individual piezoelectric ceramics 132 on the receiving surface 131.

[0049] The composite piezoelectric ceramic sensor 13 has 1024 leads, each requiring a 35mA current load, and each individual piezoelectric ceramic 132 withstands an acoustic intensity within 3W / cm². The ultrasonic sound field generator 12 emits 1MHz ultrasonic waves, with a total radiated ultrasonic power not exceeding 30W. For example, if 9000 individual piezoelectric ceramics 132 receive ultrasonic waves at a frequency of 1MHz, and the data sampling frequency is sufficiently high (e.g., 3MHz sampling), then 3 million samples per second are distributed across the 9000 individual piezoelectric ceramics 132, and a single instantaneous scan takes 3 milliseconds. This high-precision ultrasonic sound field testing device of this embodiment has high operating efficiency, lower cost, requires less calibration, and has a long service life.

[0050] In the above embodiment, the composite piezoelectric ceramic sensor 13 has 1024 leads, each connected to the data acquisition card 14. In another embodiment, all the first leads 1326 of the individual piezoelectric ceramics 132 can be electrically connected and connected to the data acquisition card 14 via a single lead. Furthermore, the first conductive plating layers 1321 of the individual piezoelectric ceramics 132 can be connected as a single unit during electroplating and then connected to the data acquisition card 14 via a single lead. This eliminates the need for fabricating 512 first leads 1326; only one lead is required to electrically connect the positive electrode of the individual piezoelectric ceramic 132 to the data acquisition card 14. The second conductive plating layers 1325 of all the individual piezoelectric ceramics 132 are directly soldered onto a PCB, and the second leads 1327 are arranged on the PCB to facilitate the routing of multiple second leads 1327. A BGA-like soldering method can be used to solder the individual piezoelectric ceramics 132 to the PCB, and the negative electrode of the individual piezoelectric ceramic 132 is connected to the data acquisition card 14 via the PCB for ease of manufacturing.

[0051] This is the working principle of the high-precision ultrasonic sound field testing device in this preferred embodiment.

[0052] Please refer to Figure 5 and Figure 6The second preferred embodiment of this utility model provides a high-precision ultrasonic sound field testing device. The difference between this device and the first embodiment is that the composite piezoelectric ceramic sensor 22 has two receiving surfaces 221, which are perpendicular to each other. During operation, the distance between the individual piezoelectric ceramics and the ultrasonic sound field generator 21 cannot be too close. By setting two receiving surfaces 221, the overall height of the composite piezoelectric ceramic sensor 22 can be reduced, the depth of the water tank 23 does not need to be too deep, and all individual piezoelectric ceramics can maintain an appropriate distance from the ultrasonic sound field generator 21, effectively saving costs. The distance between the top of the composite piezoelectric ceramic sensor 22 and the ultrasonic sound field generator 21 must be greater than 70mm.

[0053] In this embodiment, the ultrasonic power distribution is detected at a distance of 100-250mm from the ultrasonic radiation source, within a range of 500mm*200mm. Similarly, 32*16 individual piezoelectric ceramics can be set within the 500mm*200mm range. Each piezoelectric individual has a length and width of approximately 10mm*10mm. Therefore, a 5mm-10mm linear gap 222 will be formed at the connection between the two receiving surfaces 221. The linear gap 222 is filled with sound-absorbing material so that the two receiving surfaces 221 are connected as a whole.

[0054] A linear slit 222 is formed between the two receiving surfaces 221, where a single piezoelectric ceramic cannot be installed. The linear slit 222 is filled with a sound-absorbing material, such as epoxy resin. The width of the linear slit 222 is preferably an integer multiple of the width of a single piezoelectric ceramic.

[0055] Please refer to Figure 5 and Figure 6 The bottom of the composite piezoelectric ceramic sensor 22 is provided with a linear movement mechanism 24, which is used to drive the composite piezoelectric ceramic sensor 22 to move along the arrangement direction of the two receiving surfaces 221. Figure 5 and Figure 6 The x-direction in the figure represents the moving direction of the composite piezoelectric ceramic sensor 22.

[0056] After the first measurement is completed using the composite piezoelectric ceramic sensor 22, the sensor can be moved a certain distance along the arrangement direction of the two receiving surfaces 221 for a second measurement. The offset distance is 10 mm or a multiple of 10 mm, which is the width of one or more individual piezoelectric ceramics. This second measurement measures the ultrasonic power in the linear gap 222 region. This allows for a more accurate measurement of the linear gap 222 region between the two receiving surfaces 221 during the first measurement using only one receiving surface 221, ensuring that all signals emitted by the ultrasonic field generator 21 are received by the composite piezoelectric ceramic sensor 22.

[0057] The two sets of individual piezoelectric ceramics forming two receiving surfaces 221 can be soldered to two PCBs respectively, and then the two PCBs are connected to form a composite piezoelectric ceramic sensor 22, so as to facilitate processing and fabrication.

[0058] This high-precision ultrasonic sound field testing device operates by filling a water tank with water. The processing module controls the signal source and amplifier. Ultrasonic waves emitted by the ultrasonic sound field generator strike individual piezoelectric ceramics. These ceramics, through their own effects, convert the ultrasonic waves into electrical signals. A stronger sound field results in a larger voltage amplitude for the generated electrical signal, while the frequency remains constant. The test data is then output to the processing module via a data acquisition card. The processing module processes the data and displays the test results. The inclined receiving surface of the composite piezoelectric ceramic sensor increases the area of ​​the receiving surface, allowing for the arrangement of more individual piezoelectric ceramics and improving measurement accuracy. Furthermore, it reflects the ultrasonic waves to the tank wall, preventing reflection back to the ultrasonic sound field generator and ensuring accurate measurement.

[0059] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the concept of the technical solution of the present invention, should be included within the scope of protection of the present invention.

Claims

1. A high-precision ultrasonic sound field testing device, characterized in that, include: A water tank is used to hold water; An ultrasonic sound field generator is disposed in the water tank; A composite piezoelectric ceramic sensor is disposed in the water tank and located below the ultrasonic sound field generator. The composite piezoelectric ceramic sensor includes a receiving surface, which is inclined. Multiple individual piezoelectric ceramics are disposed on the receiving surface and arranged in a matrix. The individual piezoelectric ceramics are used to receive ultrasonic waves emitted by the ultrasonic sound field generator and reflect the ultrasonic waves to the wall of the water tank. A data acquisition card is disposed outside the water tank and electrically connected to the composite piezoelectric ceramic sensor. The output end of the data acquisition card is provided with a serial port and / or a USB interface. A signal source and amplifier, electrically connected to the ultrasonic sound field generator; and, The processing module is electrically connected to the signal source and amplifier, and is electrically connected to the data acquisition card through the serial port or the USB interface.

2. The high-precision ultrasonic sound field testing device according to claim 1, characterized in that, The inner wall of the water tank is lined with sound-absorbing material.

3. The high-precision ultrasonic sound field testing device according to claim 1, characterized in that, An epoxy adhesive is provided at the individual piezoelectric ceramic, and adjacent individual piezoelectric ceramics are bonded and isolated by the epoxy adhesive.

4. The high-precision ultrasonic sound field testing device according to claim 1, characterized in that, The high-precision ultrasonic sound field testing device also includes an FPC flexible flat cable data line, the two ends of which are connected to the data acquisition card and the composite piezoelectric ceramic sensor, respectively.

5. The high-precision ultrasonic sound field testing device according to claim 1, characterized in that, The angle between the receiving surface and the ultrasonic wave emitted by the ultrasonic field generator is 45°.

6. The high-precision ultrasonic sound field testing device according to claim 1, characterized in that, The water tank is rectangular in shape, and the composite piezoelectric ceramic sensor is disposed at the bottom of the water tank. The receiving surface is square, and its bottom edge is parallel to one bottom edge of the water tank.

7. The high-precision ultrasonic sound field testing device according to any one of claims 1-6, characterized in that, The receiving surface is set to one.

8. The high-precision ultrasonic sound field testing device according to any one of claims 1-6, characterized in that, The receiving surface is configured as two, and the two receiving surfaces are perpendicular to each other.

9. The high-precision ultrasonic sound field testing device according to claim 8, characterized in that, A linear gap is formed between the two receiving surfaces, and the linear gap is filled with epoxy resin; a linear moving mechanism is provided at the bottom of the composite piezoelectric ceramic sensor, which is used to drive the composite piezoelectric ceramic sensor to move along the arrangement direction of the two receiving surfaces.

10. The high-precision ultrasonic sound field testing device according to any one of claims 1-6, characterized in that, The high-precision ultrasonic sound field testing device also includes a vacuum system and a temperature detection and control system, both of which are connected to the water tank and electrically connected to the processing module.

Images