High-bandwidth ultrasonic transducer and preparation method thereof

An ultrasonic transducer, high-bandwidth technology, applied in the direction of the fluid using vibration, can solve the problems of narrow frequency range and limited application, and achieve the effect of widening the bandwidth, improving the imaging quality, and improving the detection accuracy

Active Publication Date: 2021-06-15
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above-mentioned solution can reduce the difficulty of manufacturing the annular array transducer, the frequency band obtained by it is narrow, which limits its application in the field of ultrasonic harmonic imaging of gastrointestinal endoscope

Method used

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  • High-bandwidth ultrasonic transducer and preparation method thereof
  • High-bandwidth ultrasonic transducer and preparation method thereof
  • High-bandwidth ultrasonic transducer and preparation method thereof

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Effect test

Embodiment 1

[0037] Such as figure 1 Shown is an embodiment of the high-bandwidth ultrasonic transducer of the present invention, including a matching layer 1, a backing layer 2, a plurality of piezoelectric array elements 3 arranged in an array, and an acoustic lens 4 for focusing ultrasonic beams , the piezoelectric array element 3 is provided with a first electrode surface 31 and a second electrode surface 32 arranged in a plane, the second electrode surface 32 is an emitting surface and is perpendicular to the polarization direction, and the first electrode surface 31 The spacing between the second electrode surface 32 and the second electrode surface 32 changes regularly, the backing layer 2, the piezoelectric array element 3, the matching layer 1, and the acoustic lens 4 are arranged in sequence, and the first electrode surface 31 is attached to the backing layer 2 and arranged , the second electrode surface 32 is attached to the matching layer 1 . In this embodiment, each piezoelec...

Embodiment 2

[0050] Such as Figure 7 Shown is the embodiment of the preparation method of the ultrasonic transducer of high bandwidth, comprises the following steps:

[0051] S10. bonding multiple piezoelectric block arrays to the matching layer 1, the matching layer 1 is a flexible and bendable structure;

[0052] S20. After step S10, polish the side of the piezoelectric block away from the matching layer 1, and reattach electrodes;

[0053] S30. After step S20, cut along the thickness change direction of the piezoelectric block to obtain the piezoelectric array element 3, the polished surface of the piezoelectric block is the first electrode surface 31, and the bonding surface of the piezoelectric block and the matching layer 1 is second electrode face 32;

[0054] S40. After step S30, lead out the signal line and the ground wire of the piezoelectric array element 3, and bend the matching layer 1 and the piezoelectric array element 3 to form a ring structure;

[0055] S50. After step...

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Abstract

The invention relates to the technical field of ultrasonic transducers, in particular to a high-bandwidth ultrasonic transducer and a preparation method thereof. The high-bandwidth ultrasonic transducer comprises matching layers, a backing layer, a plurality of piezoelectric array elements arranged in an array mode and an acoustic lens used for ultrasonic beam focusing; each piezoelectric array element is provided with a first electrode surface and a second electrode surface arranged in a plane mode, the second electrode surface is an emitting surface and is perpendicular to the polarization direction, and the distance between the first electrode surface and the second electrode surface changes regularly; the backing layer, the piezoelectric array elements, the matching layers and the acoustic lens are sequentially arranged; and the first electrode surfaces are attached to the backing layer, and the second electrode surfaces are attached to the matching layer. According to the high-bandwidth ultrasonic transducer, a piezoelectric unit is of a variable-thickness structure, after excitation voltage is applied, the parts, with different thicknesses, of the piezoelectric array elements vibrate at different frequencies, therefore, the bandwidth of the ultrasonic transducer is widened, the imaging quality and detection accuracy of the ultrasonic transducer are improved, and the ultrasonic transducer can be applied to harmonic imaging.

Description

technical field [0001] The present invention relates to the technical field of ultrasonic transducers, in particular to a high-bandwidth ultrasonic transducer and a preparation method thereof. Background technique [0002] As an ultrasonic imaging technology, harmonic imaging can obtain high-resolution images of deeper parts of the human body, and can effectively avoid various artifacts that are inevitably generated during the emission and propagation of fundamental components. Compared with the traditional ultrasonic shaping method of digestive tract, ultrasonic harmonic imaging technology can more effectively detect gastrointestinal submucosal tumors, pancreatic cancer and other gastrointestinal diseases. However, for harmonic imaging, since the whole system works in a wide frequency range from the fundamental wave to the harmonic, a broadband probe must be used to achieve harmonic imaging. Therefore, the high-bandwidth annular ultrasonic transducer is very important for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B06B1/06
CPCB06B1/0625B06B2201/55B06B2201/76
Inventor 彭珏李倚陈思平
Owner SHENZHEN UNIV
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