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High-sensitivity microwave humidity sensor based on two-dimensional strip-shaped MoO3 nanometer materials

A humidity sensor and nano-material technology, applied in the direction of using microwaves to test moisture content, can solve the problems of low sensitivity and long response time, and achieve high operating frequency, effective humidity detection, and reliable results.

Active Publication Date: 2019-06-14
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a two-dimensional strip-shaped MoO 3 High-sensitivity microwave humidity sensor based on nanomaterials

Method used

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  • High-sensitivity microwave humidity sensor based on two-dimensional strip-shaped MoO3 nanometer materials
  • High-sensitivity microwave humidity sensor based on two-dimensional strip-shaped MoO3 nanometer materials
  • High-sensitivity microwave humidity sensor based on two-dimensional strip-shaped MoO3 nanometer materials

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specific Embodiment approach 1

[0019]Specific implementation mode 1: This implementation mode is based on two-dimensional banded MoO 3 The high-sensitivity microwave humidity sensor of nanomaterials includes a substrate 1, a first port feeder 2, a connecting microstrip line 3, a second port feeder 4, four rectangular ring open-loop resonators and sensitive materials, a first port feeder 2, a connecting microstrip The strip line 3, the second port feeder line 4 and the four rectangular open-loop resonators are all printed on the surface of the substrate 1 using printed circuit board technology, connecting the microstrip line 3 to form a straight line segment, and connecting one end of the microstrip line 3 to the first The port feeder 2 is connected, and the other end connected to the microstrip line 3 is connected to the second port feeder 4;

[0020] Among them, the structures of No. 1 rectangular ring split-ring resonator 5 and No. 2 rectangular ring split-ring resonator 6 are the same, and the structures...

specific Embodiment approach 2

[0022] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the shape of the loop of the rectangular ring open-loop resonator is a square.

specific Embodiment approach 3

[0023] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that the opening of the rectangular ring split-ring resonator has a sharp-angled structure.

[0024] The opening of the resonator in this embodiment is a sharp-angled structure with two open ends facing each other.

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Abstract

The invention discloses a high-sensitivity microwave humidity sensor based on two-dimensional strip-shaped MoO3 nanometer materials, belongs to the field of humidity sensors, and aims to solve the problems of low sensitivity and long response time of an existing humidity sensor. In the microwave humidity sensor disclosed by the invention, one end of a connection microstrip line is communicated with a first port feeder, and the other end of the connection microstrip line is communicated with a second port feeder; a No.1 rectangular ring open loop resonator and a No.2 rectangular ring open loopresonator are symmetrically distributed on two sides of the connection microstrip line; a No.3 rectangular ring open loop resonator and a No.4 rectangular ring open loop resonator are symmetrically distributed on two sides of the connection microstrip line; the connection microstrip line and four rectangular ring open loop resonators are all in parallel line coupling; and a sensitive material is positioned on the opening of each open loop resonator. By use of the sensor, a microwave humidity detection device is optimized from multiple aspects, including frequency-selecting analysis, gas sensitive material synthesis, microwave device design and the like, and the high-sensitivity detection of a 10%-90% relative humidity range is realized.

Description

technical field [0001] The invention belongs to the field of humidity sensors, and in particular relates to a multi-frequency band-stop filter sensor used as a humidity sensing element. Background technique [0002] With the progress of society and the development of science and technology, my country's demand for high-precision, high-sensitivity, fast-response, and high-reliability IoT smart sensors is increasing day by day. There are many types of modern humidity sensors, which are mainly divided into the following categories: resistive humidity sensors, capacitive humidity sensors, optical fiber humidity sensors, piezoresistive humidity sensors, and microwave humidity sensors. They are widely used in fields related to the national economy and people's livelihood, such as industry, agriculture, national defense, aerospace, and daily home furnishing, and play a very important role; but what is inconsistent with it is that my country's high-precision humidity sensors are cur...

Claims

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Application Information

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IPC IPC(8): G01N22/04
Inventor 王琮于赫
Owner HARBIN INST OF TECH
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