Carbon nano-tube film transducer array

Abstract

The invention provides a carbon nano-tube film transducer array, and belongs to the field of ultrasonic medical treatment. The transducer array comprises a transducer array frame and sound producing elements; each sound producing element includes a carbon nano-tube film, metal electrodes and leads; all the sound producing elements are located in the same plane or curved surface; and the arrangement rule and the sizes of the sound producing elements and the distance between the centers of every two adjacent sound producing elements can be adjusted according to function requirements. When each sound producing element is connected with an audio signal, a corresponding temperature variation is generated by the corresponding carbon nano-tube film, so that a surrounding medium swells and shrinksand a sound wave is produced by stimulation; and sound waves produced by all the sound producing elements are superposed and interfere mutually in the space, and thereby, the sound wave with highly concentrated energy is produced. The transducer array has the advantages that a vibrating component is absent, arrangement is flexible, the shape can be arbitrarily changed, the production cost is low,and the like, is capable of producing the sound wave high in frequency, directivity and sensitivity, and is applied to the field of ultrasonic medical treatment, advanced radar and the like.

Description

technical field [0001] The invention belongs to the field of ultrasonic therapy, and relates to an array of ultrasonic transducers based on the thermoacoustic effect of a carbon nanotube film. Background technique [0002] With the continuous acceleration of my country's socialist construction process, people's living standards are improving day by day, and people are paying more and more attention to personal health issues, so the requirements for the quality and quantity of medical equipment are constantly increasing. Among all kinds of medical equipment, ultrasonic medical equipment has become an important class of diagnostic and therapeutic equipment due to its characteristics of small trauma, low price, and real-time imaging. At present, ultrasonic medical equipment is widely used in diagnosis and treatment links such as imaging, diagnosis, tissue cutting and elimination, sterilization and disinfection, such as commonly used B-ultrasound equipment, ultrasonic scalpel, a...

AI Technical Summary

Problems solved by technology

The ultrasonic transducer array made of piezoelectric material has four main disadvantages: (1) The impedance of the piezoelectric material increases with the decrease of the material area, resulting in a decrease in the sensitivity of the transducer array, and the generated sound Pressure drop; (2) Since the piezoelectric material itself will vibrate during the sounding process, it will cause a resonance effect and cause signal crosstalk between components, which will lead to transmission errors or loss of audio signals; (3) In order to place more Sounding elements to enhance sound pressure and directivity, and to avoid grating lobes, the sounding elements of ultrasonic transducer arrays in a limited space are usually less than 2 mm, making it very difficult to manufacture piezoelectric transducer arrays, which greatly increases the Manufacturing cost; (4) Piezoelectric materials (such as piezoelectric ceramics) that are widely used at present contain a large amount of heavy metal ions that pollute the environment, and improper handling can easily damage the ecological environment

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