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A self-powered breathing sensor based on bionic nasal cavity structure and its preparation method

A breathing sensor and nasal cavity structure technology, applied in the sensor field, can solve the problem that the formation mechanism has not been fully studied, and achieve the effects of enhancing the output electrical signal, easy-to-obtain materials, and novel and simple design.

Active Publication Date: 2020-09-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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AI Technical Summary

Problems solved by technology

Although the common phenomenon of friction electrification has been recognized by humans for nearly a thousand years, its formation mechanism has not yet been fully studied.

Method used

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  • A self-powered breathing sensor based on bionic nasal cavity structure and its preparation method
  • A self-powered breathing sensor based on bionic nasal cavity structure and its preparation method
  • A self-powered breathing sensor based on bionic nasal cavity structure and its preparation method

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Embodiment Construction

[0038] Below in conjunction with specific embodiment and description accompanying drawing and the present invention is clearly and completely described, with the hope that those skilled in the art can understand the working principle and the realized function of the present invention:

[0039] figure 1 It is a specific implementation of the self-powered gas sensor provided by the present invention, and its overall structure simulation diagram is as follows figure 1 as shown in (b), figure 1 (a) for figure 1 (b) Simulation diagram of cross-section obtained along the radial direction. The self-powered gas sensor includes an insulating cylinder 1 provided with a respiratory airflow, and the insulating cylinder 1 needs to have a certain hardness as a test chamber; the inner wall surface of the insulating cylinder 1 is provided with a metal film 2 as an electrode layer; The film 2 is provided with a power generation array uniformly distributed along the inner circumference of th...

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Abstract

A self-powered breathing sensor based on a bionic nasal cavity structure and a preparation method thereof belong to the technical field of sensors. In the present invention, an electrode layer is covered on the surface of the inner wall of the insulating cylinder, and on the electrode layer, frictional electrification units arranged along the normal direction of the inner wall of the insulating cylinder, like nose hairs, are arranged neatly to form a power generation array, wherein the frictional electrification units include a flexible friction layer , a conductive layer and a sensitive film layer, driven by the respiratory airflow, adjacent triboelectric units form a contact-separation cycle, thereby generating induced charges, and outputting electrical signals to an external detection circuit through the electrode layer. Compared with the traditional sensor, the present invention significantly enhances the output electrical signal by increasing the frictional contact area while ensuring the miniaturization of the device, which is beneficial to improve the detection accuracy, and the device structure design is novel and simple, low in cost, light and easy to carry, and the material Simple and easy to obtain and convenient to process, the sensor of the present invention does not need to be in a special environment, has strong compatibility, and is not limited in application occasions.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a self-powered breathing sensor based on a bionic nasal cavity structure and a preparation method thereof. Background technique [0002] Existing studies have shown that the types and contents of substances in human breath are related to people's physical conditions, and thus a new disease diagnosis method - respiratory diagnosis has been developed, which reflects the changes in the composition of the breath exhaled by the person and reflects the corresponding tissue changes. Changes in cell metabolism, which in turn characterize the health status of the human body. Compared with traditional diagnostic methods, respiratory diagnosis has gradually attracted the attention of more and more researchers and has achieved rapid development due to its advantages of being faster and more convenient. The clinical diagnosis of asthma regards the content of nitrogen oxides in ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/02H02N1/04
CPCG01N27/02H02N1/04
Inventor 谢光忠李双定苏元捷杨铂汐潘虹张秋平黎威志太惠玲杜晓松蒋亚东
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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