Spherical phased array ultrasonic transducer

Abstract

The invention discloses a spherical phased array ultrasonic transducer, which relates to the technical field of transducers, and comprises a plurality of cambered surface array elements, all cambered surface array elements are divided into a plurality of first cambered surface array elements and a plurality of second cambered surface array elements, the thickness of the first cambered surface array elements is different from that of the second cambered surface array elements, and the thickness of the second cambered surface array elements is different from that of the first cambered surface array elements. All the first cambered surface array elements and all the second cambered surface array elements can be spliced into a spherical sensitive body, and any one first cambered surface array element is surrounded by a plurality of second cambered surface array elements; each first cambered surface array element can be independently controlled, and each second cambered surface array element can be independently controlled; according to the invention, the integrated technical requirements of underwater omnidirectional real-time short-distance voice communication and data transmission and high-precision positioning and distance measurement can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of transducers, and in particular to a spherical phased array ultrasonic transducer. Background Art

[0002] Underwater acoustic transducers are core sensing components in underwater communication, detection, and imaging technologies. They transmit and receive acoustic signals underwater, earning them the nickname "the eyes and ears of underwater acoustic equipment." The advent of the underwater acoustic transducer marked the beginning of the development of underwater equipment technology, and its continuous technological advancements provide a crucial foundation and guarantee for the long-term development of underwater equipment.

[0003] Compared with traditional single or multiple underwater ultrasonic probe devices, phased array ultrasonic transducers in underwater equipment technology can realize functions such as beam scanning, deflection and focusing, providing more powerful detection capabilities for determining the discontinuous shape, size and direction of underwater targets.

[0004] High-frequency underwater acoustic communication technology aims to enable high-quality voice communication, information exchange, and precise positioning within small water areas. However, the absorption and attenuation rate of sound waves in water increases exponentially with frequency, resulting in a narrower bandwidth and lower communication speeds, seriously impacting the effectiveness of underwater equipment. Meeting the integrated technical requirements of omnidirectional, real-time, short-range underwater voice and data transmission, along with high-precision positioning and ranging, has become a pressing challenge. Summary of the Invention

[0005] The purpose of the present invention is to provide a spherical phased array ultrasonic transducer to solve the problems existing in the above-mentioned prior art and to meet the integrated technical requirements of underwater omnidirectional real-time short-range voice communication and data transmission, high-precision positioning and ranging.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a spherical phased array ultrasonic transducer, comprising a plurality of arc surface array elements, all of which are divided into a plurality of first arc surface array elements and a plurality of second arc surface array elements, the thickness of the first arc surface array elements being different from the thickness of the second arc surface array elements, all of the first arc surface array elements and all of the second arc surface array elements being able to be spliced ​​into a spherical sensitive body, any one of the first arc surface array elements being surrounded by a plurality of the second arc surface array elements; each of the first arc surface array elements being able to be independently controlled, and each of the second arc surface array elements being able to be independently controlled.

[0008] Preferably, the outline formed by the side surfaces of the first curved surface array element is a regular pentagonal outline, and the outline formed by the side surfaces of the second curved surface array element is a regular hexagonal outline, the side length of the regular pentagonal outline is equal to the side length of the regular hexagonal outline, the five sides of the regular pentagonal outline correspond one-to-one to the five regular hexagonal outlines, and any one of the five sides of the regular pentagonal outline is spliced ​​with the corresponding side of the regular hexagonal outline.

[0009] Preferably, the arc surface array element includes a arc surface polymer plate and a plurality of piezoelectric ceramic columns, the arc surface polymer plate is provided with a plurality of first mounting holes, the first mounting holes correspond to the piezoelectric ceramic columns one-to-one, the first mounting holes can accommodate the piezoelectric ceramic columns, the inner side surface of the first mounting holes is attached to and fixed to the outer side surface of the piezoelectric ceramic columns; one end surface of the piezoelectric ceramic column is a radiating surface, and the other end surface of the piezoelectric ceramic column is an opposing surface.

[0010] Preferably, the arc surface array element also includes an arc surface common electrode thin layer panel, an arc surface holding plate, a first signal line, a plurality of conductive elastic components and a plurality of second signal lines; the arc surface common electrode thin layer panel is fixedly connected and electrically connected to each of the radiating surfaces; the arc surface holding plate is placed on the inner side of the arc surface polymer plate, and the arc surface holding plate can be fixed relative to the arc surface polymer plate, each of the conductive elastic components is arranged on the arc surface holding plate, and each of the conductive elastic components is independent of each other, the conductive elastic components are elastic and conductive, the conductive elastic components correspond one-to-one to the piezoelectric ceramic columns, and the first end face of the conductive elastic component can be pressed against the opposite surface and electrically connected to the opposite surface; one end of the first signal line is fixedly connected and electrically connected to the arc surface common electrode thin layer panel; the second signal line corresponds one-to-one to the conductive elastic component, and one end of the second signal line is fixedly connected and electrically connected to the second end of the conductive elastic component.

[0011] Preferably, the curved array element further includes a curved sound-absorbing backing plate, which is placed between the curved retaining plate and the curved polymer plate, and is fixedly connected to the curved retaining plate and the curved polymer plate. A plurality of through holes are provided on the curved sound-absorbing backing plate, and the through holes correspond one-to-one to the conductive elastic components, and the first end of the conductive elastic component can pass through the through holes.

[0012] Preferably, a plurality of second mounting holes are provided on the arc surface retaining plate, and the second mounting holes correspond one-to-one to the conductive elastic components. The middle part of the conductive elastic component is fixedly installed in the second mounting hole, and the first end of the conductive elastic component protrudes out of the second mounting hole in a direction close to the arc surface polymer plate, and the second end of the conductive elastic component protrudes out of the second mounting hole in a direction away from the arc surface polymer plate.

[0013] Preferably, the arc-surface common electrode thin layer panel is a silver paste thin layer panel, and the radiation surface and the opposite surface are both plated with a thin layer of silver paste; and the conductive elastic component is a copper spring pin.

[0014] Preferably, the first signal line and the second signal line are both converged on the inner side of the curved polymer plate; a line-passing notch is left on the spherical sensitive body, and the line-passing notch enables the first signal line and the second signal line on the inner side of the curved polymer plate to extend outside the spherical sensitive body.

[0015] Preferably, all the first signal lines and all the second signal lines are bundled into a bundled signal line, and a signal shielding sleeve is provided outside the fixed sleeve of the bundled signal line.

[0016] Preferably, the spherical sensitive body fixing cover is provided with a spherical protective shell.

[0017] Compared with the prior art, the present invention has achieved the following technical effects:

[0018] The spherical phased array ultrasonic transducer provided by the present invention has all first arc surface array elements and all second arc surface array elements that can be spliced ​​into a spherical sensitive body. Any first arc surface array element is surrounded by a plurality of second arc surface array elements. The first arc surface array element and the plurality of second arc surface array elements surrounding the first arc surface array element are combined into an array element group. The second arc surface array element can be shared between adjacent array element groups to improve the compactness of the structure. Different array element groups correspond to different directions, radiating sound waves outward or receiving external sound waves. Since the thickness of the first arc surface array element is different from that of the second arc surface array element, the thickness resonance frequency of the two is different. When the arc-surface array elements vibrate, the vibrations between them couple with each other, which will produce multi-mode coupled vibrations, thereby widening the bandwidth. On the one hand, it can enhance the information receiving and sending capabilities, improve the high-fidelity performance of underwater acoustic signals, and accurately obtain target information, realizing high-quality voice information interaction. On the other hand, high-frequency broadband helps to generate narrower pulse signals, realizing high-precision positioning of the target. Further pulse compression of broadband signals can improve the resolution of the transducer array. More importantly, high-frequency broadband can increase the communication speed of underwater acoustic communication, realize the processing of complex signals such as frequency agility, and to a certain extent compensate for the influence of narrowband underwater acoustic communication.Each first curved surface array element can be independently controlled, and each second curved surface array element can be independently controlled, that is, each curved surface array element of the spherical phased array ultrasonic transducer provided by the present invention is independently controlled. When in use, each array element group is used as the emission direction of a sound wave. According to different directions, the curved surface array elements of the array element group in the corresponding direction are controlled to vibrate by electrical signals (that is, the array element groups in different directions are controlled to vibrate separately by the control circuit), so that the purpose of array control and direction control can be achieved. When the spherical phased array ultrasonic transducer provided by the present invention is in the receiving state, based on According to the strength of the sound wave signal sensed by each array element group of the transducer, when the sound wave signal in a certain direction is the strongest, the control circuit turns on the sound wave signal in the corresponding direction to respond, thereby realizing the azimuth adaptive recognition of the spherical phased array ultrasonic transducer provided by the present invention. At the same time, since the single arc surface array element of each array element group can be controlled individually, the starting time of each specific arc surface array element can be changed by the phased array method, so that the sound wave signal can be superimposed on a specific direction path, thereby achieving the effect of strengthening the focus of the sound wave signal. In a single array element group, the circuit delay Unit, controls the starting time of different array elements therein to achieve the purpose of sound focusing, takes into account the complex and changeable underwater acoustic channel conditions in the design, the spherical phased array ultrasonic transducer provided by the present invention can integrate arc-surface array elements of multiple different vibration modes, specifically, conventional multi-mode coding modulation method and conventional adaptive receiving algorithm can be used to match different complex underwater environments, thereby improving the reliability of signal transmission and adaptability to changeable environments, each phased array element independently performs azimuth vibration control, and by regulating the starting order of the array elements in a specific azimuth, the sound wave signals are directionally superimposed, thereby achieving sound wave The enhanced signal focusing function is used to achieve high-precision positioning, ranging, and active pulse scanning. The spherical phased array ultrasonic transducer provided by the present invention can receive acoustic signals from any direction, compare the strength trends of the acoustic signals received by the curved array elements, and determine the curved array element with the strongest signal to accurately determine the sender's direction. Through conventional circuits and conventional algorithm control, the coordination mode of different arrays can be dynamically controlled to achieve omnidirectional adaptive sensing interaction. Therefore, the spherical phased array ultrasonic transducer provided by the present invention is a high-frequency, broadband, and highly sensitive spatial omnidirectional phased array ultrasonic transducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1A schematic diagram of a spherical phased array ultrasonic transducer provided by the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the structure of the arc array element;

[0022] In the figure: 1-first curved array element, 2-second curved array element, 3-curved polymer plate, 4-piezoelectric ceramic column, 5-curved retaining plate, 6-conductive elastic component, 7-wire notch. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The purpose of the present invention is to provide a spherical phased array ultrasonic transducer to solve the problems existing in the above-mentioned prior art and to meet the integrated technical requirements of underwater omnidirectional real-time short-range voice communication and data transmission, high-precision positioning and ranging.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1 to 2 As shown, the present invention provides a spherical phased array ultrasonic transducer, including a plurality of arc surface array elements, all of which are divided into a plurality of first arc surface array elements 1 and a plurality of second arc surface array elements 2. The thickness of the first arc surface array elements 1 is different from the thickness of the second arc surface array elements 2. All the first arc surface array elements 1 and all the second arc surface array elements 2 can be spliced ​​into a spherical sensitive body. Any first arc surface array element 1 is surrounded by a plurality of second arc surface array elements 2. Each first arc surface array element 1 can be independently controlled, and each second arc surface array element 2 can be independently controlled.

[0027] The spherical phased array ultrasonic transducer provided by the present invention, all the first curved surface array elements 1 and all the second curved surface array elements 2 can be spliced ​​into a spherical sensitive body, any first curved surface array element 1 is surrounded by a plurality of second curved surface array elements 2, the first curved surface array element 1 and the plurality of second curved surface array elements 2 surrounding the first curved surface array element 1 are combined into an array element group, and the second curved surface array element 2 can be shared between adjacent array element groups to improve the compactness of the structure. Different array element groups correspond to different directions, radiating sound waves outward or receiving external sound waves. Since the thickness of the first curved surface array element 1 is different from that of the second curved surface array element 2, the thickness resonance frequency of the two is different, and the two types of array elements have different thicknesses. When the arc-surface elements of different thicknesses vibrate, their vibrations couple with each other, generating multi-mode coupled vibrations, thereby widening the bandwidth. On the one hand, this can enhance the information receiving and sending capabilities, improve the high-fidelity performance of underwater acoustic signals, and accurately obtain target information, achieving high-quality voice information interaction. On the other hand, high-frequency broadband helps to generate narrower pulse signals, achieving high-precision positioning of the target. Further pulse compression of broadband signals can improve the resolution of the transducer array. More importantly, high-frequency broadband can increase the communication speed of underwater acoustic communications, realize the processing of complex signals such as frequency agility, and to a certain extent compensate for the influence of narrowband underwater acoustic communications.Each first curved surface array element 1 can be independently controlled, and each second curved surface array element 2 can be independently controlled, that is, each curved surface array element of the spherical phased array ultrasonic transducer provided by the present invention is independently controlled. When in use, each array element group is used as the emission direction of a sound wave. According to different directions, the curved surface array elements of the array element group in the corresponding direction are controlled to vibrate by electrical signals (that is, the array element groups in different directions are controlled to vibrate separately by the control circuit), so that the purpose of array control and direction control can be achieved. When the spherical phased array ultrasonic transducer provided by the present invention is in the receiving state, According to the strength of the sound wave signal sensed by each array element group of the transducer, when the sound wave signal in a certain direction is the strongest, the control circuit turns on the sound wave signal in the corresponding direction to respond, thereby realizing the azimuth adaptive recognition of the spherical phased array ultrasonic transducer provided by the present invention. At the same time, since the single arc surface array element of each array element group can be controlled individually, the starting time of each specific arc surface array element can be changed by the phased array method, so that the sound wave signal can be superimposed on a specific direction path, thereby achieving the effect of strengthening the focus of the sound wave signal. In a single array element group, the circuit delay can be used to The delay unit controls the starting time of different array elements to achieve the purpose of sound focusing. The complex and changeable underwater acoustic channel conditions are taken into consideration in the design. The spherical phased array ultrasonic transducer provided by the present invention can integrate arc-shaped array elements with multiple different vibration modes. Specifically, the conventional multi-mode coding modulation method and the conventional adaptive receiving algorithm can be used to match different complex underwater environments, thereby improving the reliability of signal transmission and adaptability to changing environments. Each phased array element independently performs azimuth vibration control, and the acoustic wave signal is directionally superimposed by adjusting the starting order of the array elements in a specific azimuth, thereby achieving acoustic focusing. The enhanced signal focusing function is used to achieve high-precision positioning, ranging, and active pulse scanning. The spherical phased array ultrasonic transducer provided by the present invention can receive acoustic signals from any direction, compare the strength trends of the acoustic signals received by the curved array elements, and determine the curved array element with the strongest signal to accurately determine the sender's direction. Through conventional circuits and conventional algorithm control, the coordination mode of different arrays can be dynamically controlled to achieve omnidirectional adaptive sensing interaction. Therefore, the spherical phased array ultrasonic transducer provided by the present invention is a high-frequency, broadband, and highly sensitive spatial omnidirectional phased array ultrasonic transducer.

[0028] It should be noted here that the spherical phased array ultrasonic transducer provided by the present invention does not involve any specific improvements to the control circuit. In actual applications, the corresponding control circuit can be adaptively and conventionally set according to the usage requirements; the spherical phased array ultrasonic transducer provided by the present invention does not involve any specific improvements to the coding modulation method and the adaptive receiving algorithm. In actual applications, the corresponding coding modulation method and the adaptive receiving algorithm can be adaptively and conventionally set according to the usage requirements.

[0029] In this embodiment, the size of the spherical phased array ultrasonic transducer provided by the present invention is controlled to be between 50 mm and 100 mm in diameter.

[0030] As a more preferred embodiment of the present invention, the outline formed by the side surfaces of the first curved surface array element 1 is a regular pentagonal outline, and the outline formed by the side surfaces of the second curved surface array element 2 is a regular hexagonal outline. The side length of the regular pentagonal outline is equal to the side length of the regular hexagonal outline. The five sides of the regular pentagonal outline correspond one-to-one with the five regular hexagonal outlines. Any one of the five sides of the regular pentagonal outline is spliced ​​with the side of the corresponding regular hexagonal outline, that is, six second curved surface array elements 2 are surrounded by the first curved surface array element 1 as the center. The structure is compact and easy to manufacture, arrange and use.

[0031] As a more preferred embodiment of the present invention, the arc surface array element includes a arc surface polymer plate 3 and several piezoelectric ceramic pillars 4. Several first mounting holes are opened on the arc surface polymer plate 3. The first mounting holes correspond one-to-one to the piezoelectric ceramic pillars 4. The first mounting holes can accommodate the piezoelectric ceramic pillars 4. The inner side surface of the first mounting hole is bonded and fixed to the outer side surface of the piezoelectric ceramic pillars 4 to obtain a piezoelectric composite material. The inner side surface of the first mounting hole on the arc surface polymer plate 3 is bonded and fixed to the outer side surface of the piezoelectric ceramic pillars 4 to suppress the lateral vibration mode of the piezoelectric ceramic pillars 4 and strengthen the vibration in the thickness direction of the arc surface polymer plate 3. It has high electromechanical coupling coefficient and low lateral crosstalk characteristics, which significantly improves the sensitivity and resolution of the transducer. Each piezoelectric ceramic pillar 4 and the part of the arc surface polymer plate 3 wrapped on its outside form a primitive, that is, the primitive corresponds one-to-one to the piezoelectric ceramic pillars 4; one end surface of the piezoelectric ceramic pillar 4 is a radiating surface, and the other end surface of the piezoelectric ceramic pillar 4 is an opposite surface.

[0032] Process flow: First, the piezoelectric ceramics are cut and filled using a cutting and filling process to prepare a piezoelectric composite material, and a curved surface forming process is used to prepare a curved surface piezoelectric composite material; secondly, the curved surface piezoelectric composite material is polished and cut according to the size of the curved surface array element, and these curved surface array elements are spliced ​​using a splicing process according to the shape and number of the required curved surface array elements, and the electrodes of each curved surface array element are individually led out to prepare a spherical sensitive body; finally, the conventional glue potting process of the underwater acoustic transducer is used to prepare the spherical phased array ultrasonic transducer provided by the present invention.

[0033] As a more preferred embodiment of the present invention, the curved array element also includes a curved common electrode thin layer panel, a curved surface holding plate 5, a first signal line, a plurality of conductive elastic components 6 and a plurality of second signal lines; the curved common electrode thin layer panel is fixedly connected and electrically connected to each radiating surface; the curved surface holding plate 5 is placed on the inner side of the curved surface polymer plate 3, and the curved surface holding plate 5 can be fixed relative to the curved surface polymer plate 3, and each conductive elastic component 6 is arranged on the curved surface holding plate 5, and each conductive elastic component 6 is independent of each other, and the conductive elastic component 6 is elastic and conductive, and the conductive elastic component 6 corresponds one-to-one to the piezoelectric ceramic column 4, and the first end face of the conductive elastic component 6 can be pressed against the opposite surface and electrically connected to the opposite surface; one end of the first signal line is fixedly connected and electrically connected to the curved common electrode thin layer panel; the second signal line corresponds one-to-one to the conductive elastic component 6, and one end of the second signal line is fixedly connected and electrically connected to the second end of the conductive elastic component 6, and a curved array element is connected through the curved common electrode thin layer panel. The radiation surfaces of all piezoelectric ceramic columns 4 are connected together, and the arc-surface common electrode thin layer panel is connected to the outside of the spherical phased array ultrasonic transducer provided by the present invention through the first signal line. The first end face of the elastic and conductive conductive elastic component 6 is pressed against the opposite surface of the piezoelectric ceramic column 4 and electrically connected to the opposite surface of the piezoelectric ceramic column 4. One end of the second signal line is fixedly connected and electrically connected to the second end of the conductive elastic component 6, so that the electrical signal communication between the second signal line and the piezoelectric ceramic column 4 is achieved. Due to the elastic support of the conductive elastic component 6, the first end face of the conductive elastic component 6 is always in contact with the opposite surface of the piezoelectric ceramic column 4 and adaptively fits, which not only ensures stable signal conduction, but also does not form a load on the array element (or piezoelectric ceramic column 4), ensures the consistency of the resonant frequency of the array element in the thickness direction, ensures stable vibration performance, and thus ensures the stable transmission performance and receiving performance of the spherical phased array ultrasonic transducer provided by the present invention.

[0034] As an optional implementation of this embodiment, the piezoelectric ceramic column 4 can be made of, but is not limited to, lead zirconate titanate, barium titanate, or potassium sodium niobate.

[0035] As a more preferred embodiment of the present invention, the curved array element also includes a curved sound-absorbing backing plate, which is placed between the curved retaining plate 5 and the curved polymer plate 3. The curved sound-absorbing backing plate is fixedly connected to the curved retaining plate 5 and the curved polymer plate 3. A plurality of through holes are provided on the curved sound-absorbing backing plate, and the through holes correspond one-to-one to the conductive elastic components 6. The first end of the conductive elastic component 6 can pass through the through hole, thereby absorbing reverse sound waves during inward radiation, and effectively supporting the curved polymer plate 3 and the conductive elastic component 6 through the curved sound-absorbing backing plate, thereby improving the stability of the overall structure.

[0036] As a more preferred embodiment of the present invention, the curved sound-absorbing backing plate is a foam board, which is light in weight and has an effective sound-absorbing effect. When the piezoelectric ceramic column 4 is excited by the excitation signal, it vibrates in the thickness direction (axial direction), and sound waves are generated on the surface of the piezoelectric ceramic column 4 and radiated to the curved sound-absorbing backing plate. The dense porous structure of the foam board can effectively absorb the sound waves radiated by the vibration, and the density of the foam plastic is very small, which can reduce the weight of the transducer.

[0037] As a more preferred embodiment of the present invention, a plurality of second mounting holes are provided on the arc surface retaining plate 5, and the second mounting holes correspond one-to-one to the conductive elastic components 6. The middle part of the conductive elastic component 6 is fixedly mounted in the second mounting hole, and the first end of the conductive elastic component 6 protrudes out of the second mounting hole in a direction close to the arc surface polymer plate 3, and the second end of the conductive elastic component 6 protrudes out of the second mounting hole in a direction away from the arc surface polymer plate 3, so that one end of the second signal line is fixedly connected and electrically connected to the second end of the conductive elastic component 6; as a more preferred embodiment of the present invention, the middle part of the conductive elastic component 6 is welded to the arc surface retaining plate 5 by welding.

[0038] As a more preferred embodiment of the present invention, the arc-surface common electrode thin layer panel is a silver paste thin layer panel, and the radiation surface and the opposite surface are plated with a thin layer of silver paste to improve the smoothness of signal conduction; the conductive elastic component 6 is a copper spring pin, which has good conductivity, is durable, and is easy to manufacture.

[0039] As a more preferred embodiment of the present invention, the first signal line and the second signal line are both converged on the inner side of the curved polymer plate 3; a line-passing notch 7 is left on the spherical sensitive body, and the line-passing notch 7 enables the first signal line and the second signal line on the inner side of the curved polymer plate 3 to extend outside the spherical sensitive body, which is convenient for manufacturing and use; in this embodiment, the line-passing notch 7 is formed by the missing of a curved array element.

[0040] As a more preferred embodiment of the present invention, all first signal lines and all second signal lines are bundled into a bundled signal line, and a signal shielding sleeve is provided outside the fixed sleeve of the bundled signal line, resulting in a simple and neat structure.

[0041] As a more preferred embodiment of the present invention, the spherical sensitive body fixing cover is provided with a spherical protective shell. The spherical protective shell is made of a material whose density, sound velocity and characteristic impedance are relatively close to those of the water medium, and can better match water.

[0042] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A spherical phased array ultrasonic transducer, characterized in that: The device comprises a plurality of arc surface array elements, all of which are divided into a plurality of first arc surface array elements and a plurality of second arc surface array elements. The thickness of the first arc surface array elements is different from the thickness of the second arc surface array elements. All of the first arc surface array elements and all of the second arc surface array elements can be spliced ​​into a spherical sensitive body. Any first arc surface array element is surrounded by a plurality of second arc surface array elements. Each of the first arc surface array elements can be independently controlled, and each of the second arc surface array elements can be independently controlled.

2. The spherical phased array ultrasonic transducer according to claim 1, characterized in that: The outline formed by the side surfaces of the first curved surface array element is a regular pentagonal outline, and the outline formed by the side surfaces of the second curved surface array element is a regular hexagonal outline. The side length of the regular pentagonal outline is equal to the side length of the regular hexagonal outline. The five sides of the regular pentagonal outline correspond one-to-one to the five regular hexagonal outlines, and any one of the five sides of the regular pentagonal outline is spliced ​​with the corresponding side of the regular hexagonal outline.

3. The spherical phased array ultrasonic transducer according to claim 1, characterized in that: The curved surface array element includes a curved surface polymer plate and a plurality of piezoelectric ceramic columns. The curved surface polymer plate is provided with a plurality of first mounting holes. The first mounting holes correspond one-to-one with the piezoelectric ceramic columns. The first mounting holes can accommodate the piezoelectric ceramic columns. The inner side surface of the first mounting hole is attached to and fixed to the outer side surface of the piezoelectric ceramic column. One end surface of the piezoelectric ceramic column is a radiating surface, and the other end surface of the piezoelectric ceramic column is an opposing surface.

4. The spherical phased array ultrasonic transducer according to claim 3, characterized in that: The arc surface array element also includes an arc surface common electrode thin layer panel, an arc surface holding plate, a first signal line, a plurality of conductive elastic components and a plurality of second signal lines; the arc surface common electrode thin layer panel is fixedly connected and electrically connected to each of the radiating surfaces; the arc surface holding plate is placed on the inner side of the arc surface polymer plate, and the arc surface holding plate can be fixed relative to the arc surface polymer plate, each of the conductive elastic components is arranged on the arc surface holding plate, and each of the conductive elastic components is independent of each other, the conductive elastic components are elastic and conductive, the conductive elastic components correspond one-to-one to the piezoelectric ceramic columns, and the first end face of the conductive elastic component can be pressed against the opposite surface and electrically connected to the opposite surface; one end of the first signal line is fixedly connected and electrically connected to the arc surface common electrode thin layer panel; the second signal line corresponds one-to-one to the conductive elastic component, and one end of the second signal line is fixedly connected and electrically connected to the second end of the conductive elastic component.

5. The spherical phased array ultrasonic transducer according to claim 4, characterized in that: The curved array element also includes a curved sound-absorbing backing plate, which is placed between the curved retaining plate and the curved polymer plate. The curved sound-absorbing backing plate is fixedly connected to the curved retaining plate and the curved polymer plate. A plurality of through holes are formed on the curved sound-absorbing backing plate, and the through holes correspond one-to-one to the conductive elastic components. The first end of the conductive elastic component can pass through the through holes.

6. The spherical phased array ultrasonic transducer according to claim 4, characterized in that: A plurality of second mounting holes are provided on the arc surface retaining plate, and the second mounting holes correspond one-to-one to the conductive elastic components. The middle portion of the conductive elastic component is fixedly mounted in the second mounting hole. The first end of the conductive elastic component protrudes out of the second mounting hole in a direction approaching the arc surface polymer plate, and the second end of the conductive elastic component protrudes out of the second mounting hole in a direction away from the arc surface polymer plate.

7. The spherical phased array ultrasonic transducer according to claim 4, characterized in that: The arc-surface common electrode thin layer panel is a silver paste thin layer panel, and the radiation surface and the opposite surface are both plated with a silver paste thin layer; the conductive elastic component is a copper spring thimble.

8. The spherical phased array ultrasonic transducer according to claim 4, characterized in that: The first signal line and the second signal line are both gathered on the inner side of the arc-surface polymer plate; a line-passing notch is left on the spherical sensitive body, and the line-passing notch enables the first signal line and the second signal line on the inner side of the arc-surface polymer plate to extend outside the spherical sensitive body.

9. The spherical phased array ultrasonic transducer according to claim 8, characterized in that: All the first signal lines and all the second signal lines are bundled into a bundled signal line, and a signal shielding sleeve is provided outside the fixed sleeve of the bundled signal line.

10. The spherical phased array ultrasonic transducer according to claim 9, characterized in that: The spherical sensitive body fixing cover is provided with a spherical protective shell.

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