Ultrasonic sensor and electronic device

A sensor and ultrasonic technology, applied in the field of sensors, can solve the problem that the bandwidth of ultrasonic sensors cannot meet the needs of use, and achieve the effect of expanding the bandwidth

Inactive Publication Date: 2018-11-02
NANCHANG OUFEI BIOLOGICAL IDENTIFICATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In recent years, with the development of science and technology, the application of ultrasonic sensors has

Method used

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  • Ultrasonic sensor and electronic device
  • Ultrasonic sensor and electronic device
  • Ultrasonic sensor and electronic device

Examples

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Embodiment Construction

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "first" and "second" are used for description purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0034] In the descr...

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Abstract

The invention discloses an ultrasonic sensor and an electronic device. The ultrasonic sensor includes a piezoelectric layer, a matching layer, and a backing layer; the matching layer is formed on onesurface of the piezoelectric layer; the matching layer is made of metal and a polymer; the backing layer is placed on the other surface of the piezoelectric layer; and the backing layer and the matching layers are respectively placed on the two opposite surfaces of the piezoelectric layer. According to the ultrasonic sensor and the electronic device provided by the embodiments of the present invention, the matching layer is additionally arranged on the piezoelectric layer of the ultrasonic sensor, so that the plurality of resonant frequencies of the ultrasonic sensor can undergo multi-modal coupling, so that the bandwidth of the ultrasonic sensor can be extended.

Description

technical field [0001] The invention relates to the field of sensors, in particular to an ultrasonic sensor and an electronic device. Background technique [0002] In recent years, with the development of science and technology, the application of ultrasonic sensors has become more and more extensive. In many occasions, the bandwidth of ultrasonic sensors cannot meet the needs of use. Contents of the invention [0003] Embodiments of the present invention provide an ultrasonic sensor and an electronic device. [0004] The ultrasonic sensor of the embodiment of the present invention comprises: [0005] Piezoelectric layer; [0006] A matching layer, the matching layer is formed on the surface of the piezoelectric layer, the matching layer is made of metal and polymer, and the volume fraction of the metal is 5% to 60%; and [0007] A backing layer, the backing layer is placed on the other surface of the piezoelectric layer, and the backing layer and the matching layer are...

Claims

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Application Information

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IPC IPC(8): G01D5/48
CPCG01D5/48
Inventor 侯美珍马炳乾骆剑锋
Owner NANCHANG OUFEI BIOLOGICAL IDENTIFICATION TECH
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