Nanometer gas sensor modeling method based on equivalent circuit

A gas sensor and equivalent circuit technology, applied in the fields of instruments, electrical digital data processing, computing, etc., can solve the problems of inability to obtain, cumbersome process, time-consuming and so on

CN112784514APending Publication Date: 2021-05-11NORTHEASTERN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-05-11

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Abstract

The invention provides a nanometer gas sensor modeling method based on an equivalent circuit, and relates to the technical field of gas sensors. According to the method, blind box processing and modularization processing are carried out on the nano gas sensor, an equivalent circuit is used for simulating the nano gas sensor, after the whole equivalent circuit of the nano gas sensor is packaged, an input and output effect similar to that of an actual sensor is generated, and the modularization processing comprises the steps of firstly carrying out preliminary division through functions. Different parameters, different operation processes and different expression forms are subjected to module refinement, the equivalent circuit is divided into an input circuit subsystem, a conversion circuit subsystem and a filter circuit subsystem, and the three subsystems are sequentially connected in series. According to the method, the problems that in the model building process of the nano gas sensor, only description can be performed but simulation cannot be performed are solved, the problem that the nano gas sensor model does not have universality is solved, and the problem that the influence of different parameter changes on sensor response is described at the same time is solved, so that the cost is reduced, and the efficiency is improved.
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Description

technical field

[0001] The invention relates to the technical field of gas sensors, in particular to an equivalent circuit-based nanometer gas sensor modeling method. Background technique

[0002] A gas sensor is a device that can convert information such as gas composition and concentration into electrical signals, including semiconductor gas sensors, electrochemical gas sensors, catalytic combustion gas sensors, thermal conductivity gas sensors, infrared gas sensors, and solid electrolyte gas sensors. Various types of sensors.

[0003] In recent years, gas sensors have been widely developed in biology, chemistry, machinery, aviation, military, etc. Nanostructured materials have been widely used to make gas sensors due to their advantages of lowering the working temperature and consuming less energy. Performance tends to change abruptly after scaling. The most important feature of nanostructured materials is a particularly high specific surface area, which will facilitate...

Examples

Embodiment Construction

[0030] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] This example is for figure 1 The shown nanoscale gas sensor for model simulation. In the nano gas sensor, the gas sensitive material is diluted and evenly coated on the surface of the ceramic tube, and the resistance wire is placed inside the ceramic tube, and finally the two ends of the resistance wire and the four pins of the ceramic tube are welded to the base. By changing the voltage at both ends of the resistance wire, the power of the resistance wire is changed so that the temperature changes, and the change of the output current reflects the responsiveness of the material to the gas.

[0032] The response performance of nano gas sensors is affected by many ...