Ultrasonic transducer, ultrasonic array probe and ultrasonic imaging system

An ultrasonic transducer, ultrasonic array technology, applied in ultrasonic/sonic/infrasound image/data processing, ultrasonic/sonic/infrasonic diagnosis, sonic diagnosis, etc., can solve the high processing requirements of piezoelectric materials, manufacturing process and control The method is complicated and other problems, so as to achieve the effect of improving the imaging resolution and increasing the bandwidth.

Inactive Publication Date: 2017-06-30
SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is that the existing technologies for obtaining high-frequency ultrasonic signals or multi-frequency ultrasonic signals by using low-frequency piezoelectric materials either have high requirements for the processing of piezoelectric materials, or the manufacturing process and control methods are complicated.

Method used

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  • Ultrasonic transducer, ultrasonic array probe and ultrasonic imaging system
  • Ultrasonic transducer, ultrasonic array probe and ultrasonic imaging system
  • Ultrasonic transducer, ultrasonic array probe and ultrasonic imaging system

Examples

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Embodiment 1

[0038] Such as figure 1 with 2 As shown, this embodiment provides an ultrasonic transducer, including: a piezoelectric sheet group, the piezoelectric sheet group includes at least two piezoelectric sheets 1 stacked along the thickness direction and the poles of two adjacent piezoelectric sheets 1 in the opposite direction.

[0039]In the ultrasonic transducer provided in this embodiment, by superimposing two or more piezoelectric sheets 1 with different polarization directions, the ultrasonic transducer has the reference frequency of each piezoelectric sheet 1 forming its working layer. There are also multiple synthetic resonant frequencies, and the difference from the traditional multi-layer superimposed ultrasonic transducer and the traditional reverse layer transducer is that when the thickness of each layer of piezoelectric sheet 1 is the same, the frequency at which the resonance occurs is no longer 2 Double the frequency but triple the frequency. Image 6 Shown is the...

Embodiment 2

[0044] An embodiment of the present invention provides an ultrasonic array probe, which includes: a multi-element array formed by a plurality of ultrasonic transducers arranged in arrangement.

[0045] Such as image 3 As shown, the ultrasonic transducer includes at least two piezoelectric sheet groups, and one side surfaces of the at least two piezoelectric sheet groups are commonly connected by a conductive member. The ultrasonic transducer may include a plurality of piezoelectric sheet groups, and the plurality of piezoelectric sheet groups may form an array as ultrasonic array elements.

[0046] As an optional implementation mode, the ultrasonic transducers of this embodiment share a bottom or top piezoelectric sheet, and the corresponding top or bottom piezoelectric sheets are arranged separately, wherein the shared piezoelectric sheet can be used as a common ground terminal, The separately arranged piezoelectric sheets are respectively connected to the electrodes, so as...

Embodiment 3

[0051] Such as Figure 5 As shown, this embodiment provides an ultrasonic imaging system, including: any one of the ultrasonic transducers with reversed layer distribution provided in the above-mentioned embodiment 1, an ultrasonic transmitting circuit, an ultrasonic echo receiving circuit, and an ultrasonic echo receiving circuit. The wave is processed and converted into a processing circuit for images, and a transceiving switch (T / R Switch) for switching the ultrasonic transmitting circuit and the ultrasonic echo receiving circuit.

[0052] Specifically, the above-mentioned ultrasonic transducer forms an ultrasonic probe 21; the transceiving switch 22 is used to control the switching of the ultrasonic transmitting circuit and the ultrasonic echo receiving circuit; the ultrasonic transmitting circuit includes a pulse transmitter 23; the ultrasonic echo receiving circuit includes an echo Receiver 24; processing circuit includes IL (inversion layer, inversion layer) time gain c...

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Abstract

The invention provides an ultrasonic transducer, an ultrasonic array probe and an ultrasonic imaging system, and belongs to the technical field of ultrasonics. The ultrasonic transducer comprises a piezoelectric plate group, wherein the piezoelectric plate group comprises at least two piezoelectric plates which are superposed in a thickness direction, and the polarization directions of every two adjacent piezoelectric plates are reverse. According to the ultrasonic transducer provided by the invention, two or more piezoelectric plates which are different in polarization directions are stacked, so that the ultrasonic transducer further has a plurality of synthesized resonant frequencies in addition to the reference frequencies of the piezoelectric plates which form a working layer of the ultrasonic transducer, and therefore, high-frequency ultrasonic imaging and multi-frequency ultrasonic imaging can be realized, and the bandwidth and imaging resolution of the transducer are improved.

Description

technical field [0001] The invention relates to the field of ultrasonic technology, in particular to an ultrasonic transducer, an ultrasonic array probe and an ultrasonic imaging system. Background technique [0002] The ultrasonic transducer is a device that converts electrical signals into ultrasonic signals and converts ultrasonic echoes into electrical signals through the piezoelectric effect and the inverse piezoelectric effect. It is the core device of the ultrasonic imaging system. For example, the probe used in clinical B-ultrasound detection is composed of an array of ultrasonic transducers. [0003] With the development of clinical technology, especially the increasing popularity of interventional ultrasound technology, the resolution requirements of ultrasound imaging are getting higher and higher. The resolution of the ultrasonic image is mainly determined by the center frequency of the ultrasonic transducer. The higher the frequency, the shorter the wavelength ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B06B1/06A61B8/00
CPCA61B8/4477A61B8/4483A61B8/52B06B1/06
Inventor 简小华
Owner SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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