CN112033979B - Chemical liquid microwave sensor based on metamaterial and application thereof - Google Patents

Chemical liquid microwave sensor based on metamaterial and application thereof Download PDF

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CN112033979B
CN112033979B CN202010915604.4A CN202010915604A CN112033979B CN 112033979 B CN112033979 B CN 112033979B CN 202010915604 A CN202010915604 A CN 202010915604A CN 112033979 B CN112033979 B CN 112033979B
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chemical liquid
induction cavity
substrate
cylindrical induction
microwave sensor
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CN112033979A (en
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罗衡
邓联文
黄生祥
高小惠
赵岩
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Hunan Huasheng Diantong Technology Co ltd
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Central South University
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Abstract

The invention discloses a chemical liquid microwave sensor based on a metamaterial and application thereof, and the chemical liquid microwave sensor comprises a substrate (1), a step-type microstrip transmission line (2), an omega-type open resonant ring (3), a cylindrical induction cavity (4) and a microstrip line ground wire (5). The invention utilizes the microwave transmission coefficient resonance effect of a metamaterial structure formed by integrating a microstrip transmission line and an open resonant ring on a substrate, when chemical liquid in an induction cavity changes, the resonance frequency point of the microwave transmission coefficient can obviously shift, thereby realizing the accurate identification of the chemical liquid type, effectively overcoming the defects of very limited identification type, poor robustness due to environmental interference and incapability of being reused of the traditional chemical liquid sensor, and having the advantages of simple structure, high sensitivity, small volume, low cost, multiple types of measured liquid, small measurement error and reusability.

Description

Chemical liquid microwave sensor based on metamaterial and application thereof
Technical Field
The invention belongs to the technical field of microelectronic devices, and particularly relates to a chemical liquid microwave sensor based on a metamaterial and application thereof.
Background
The chemical liquid sensor plays an important role in the fields of liquid food, liquid product production and processing, biological tissue fluid component identification and the like. Chinese patent ZL201921076734.2 discloses a double-layer oil tank with detection device, detects the liquid leakage condition in the cavity, and pressure sensor then can monitor the gas permeation condition in the cavity, and the material according to permeating is that petroleum liquid, water or petroleum gas can carry out preliminary judgement to double-layer oil tank leakage position. ZL201920733242.X discloses a skid-mounted storage tank oil leakage monitoring device, which is internally provided with a combustible gas sensor and a liquid sensor and can monitor leaked liquid in an interlayer of a storage tank in time. ZL201920693442.7 discloses arid area cistern mass flow automatic control and quality of water clean system, including singlechip and with singlechip signal transmission's liquid sensor, improved the utilization ratio of rainwater. ZL201880023984.1 discloses a liquid sensor made using a plurality of electrochemical cells in series. ZL201780083934.8 discloses a sensor sending a signal to an antenna unit for detecting a metal contact surface of a liquid.
However, most of the conventional chemical liquid sensors are based on the chemical reaction principle, and need to use a chemical probe to directly contact with a detection sample for detection, so that the detection unit has a large size, the repeated detection process causes waste of a detection object, the cost is invisibly and greatly increased, and on the other hand, especially, the detection of biological tissue liquid may cause certain damage to the organism. The problem can be solved thoroughly by using the non-contact interaction of the electromagnetic wave and the detection object, and the customized design can be carried out for quick detection due to the high flexibility of the structural design.
Disclosure of Invention
The invention aims to provide a metamaterial-based chemical liquid microwave sensor without using a chemical probe and application thereof.
The invention relates to a chemical liquid microwave sensor based on a metamaterial, which comprises a substrate (1), a step-type microstrip transmission line (2), an omega-type open resonant ring (3), a cylindrical induction cavity (4) and a microstrip line ground wire (5); a cylindrical induction cavity (4) is arranged on the upper surface of the substrate (1); an omega-shaped open resonant ring (3) is arranged on a substrate (1) along the outline side line of a cylindrical induction cavity (4), the circular area of the upper half part of the omega-shaped open resonant ring (3) is concentric with the cylindrical induction cavity (4), the cylindrical induction cavity (4) is positioned in the omega-shaped open resonant ring (3), and the diameter of the cylindrical induction cavity (4) is the same as the inner diameter of the omega-shaped open resonant ring (3); a step-type microstrip transmission line (2) is arranged on the outer side of the upper semicircle of the omega-type opening resonance (3), and the omega-type opening resonance ring (3) is positioned on the bent inner side of the step-type microstrip transmission line (2); the circle center of the cylindrical induction cavity (4) is also positioned on the straight line at the two ends of the step-type microstrip transmission line (2); a layer of copper film is coated on the lower surface of the substrate to be used as a microstrip line ground wire (5).
The cylindrical sensing cavity (4) is coated with a copper film.
The depth of the cylindrical induction cavity (4) is 97-99% of the thickness of the substrate (1).
The substrate (1) is made of one of epoxy resins of FR1, FR2, FR3, FR4, FR5 and FR6 models.
The step-type microstrip transmission line (2) and the omega-type opening resonance ring (3) are manufactured on the substrate (1) by adopting a screen printing process according to the design size of the chemical liquid microwave sensor.
The method for printing the stepped microstrip transmission line (2) and the omega-shaped open resonant ring (3) on the substrate (1) specifically comprises the following steps: and preparing a screen printing plate according to the design size of the chemical liquid microwave sensor, placing the screen printing plate on the upper surface of the substrate (1), and then obtaining a corresponding structure through a screen printing process.
The metamaterial-based chemical liquid microwave sensor is applied to identification of chemical liquid.
The metamaterial-based chemical liquid microwave sensor is applied to identification of polyethylene glycol 300, polyethylene glycol 1500, isopropanol, liquid ammonia and water chemical liquid.
The principle of the invention is as follows: the sensor of the invention utilizes the principle of microwave transmission coefficient resonance effect that a substrate integrates a microstrip transmission line and an open resonant ring to form a metamaterial structure, and when chemical liquid in an induction cavity changes, the resonance frequency point of the microwave transmission coefficient can obviously shift, thereby realizing the accurate identification of the chemical liquid type.
The invention has the beneficial effects that: the invention utilizes the microwave transmission coefficient resonance effect of a metamaterial structure formed by integrating a microstrip transmission line and an open resonant ring on a substrate, when chemical liquid in an induction cavity changes, the resonance frequency point of the microwave transmission coefficient can obviously shift, thereby realizing the accurate identification of the chemical liquid type, effectively overcoming the defects of very limited identification type, poor robustness due to environmental interference and incapability of being reused of the traditional chemical liquid sensor, and having the advantages of simple structure, high sensitivity, small volume, low cost, multiple types of measured liquid, small measurement error and reusability.
Drawings
Fig. 1 is a schematic view of the upper surface structure of the microwave sensor of the present invention.
Fig. 2 is a schematic view of the lower surface structure of the microwave sensor of the present invention.
The sensor in the embodiment of fig. 3 detects the microwave transmission curves of various liquids.
Wherein: the antenna comprises a substrate-1, a step-type microstrip transmission line-2, an omega-type open resonant ring-3, a cylindrical induction cavity-4 and a microstrip line ground wire-5.
Detailed Description
Example 1:
a chemical liquid microwave sensor based on metamaterial comprises a substrate 1, a step-type microstrip transmission line 2, an omega-type open resonant ring 3, a cylindrical induction cavity 4 and a microstrip line ground wire 5; the upper surface structure is shown in fig. 1, and the lower surface structure is shown in fig. 2.
(1) The substrate 1 is made of one of the epoxy resins of FR4 type, with a thickness of 1.64 mm; the lower surface of the base 1 is coated with a copper film, namely a microstrip line ground wire 5.
(2) A cylindrical induction cavity 4 is processed on a substrate with the copper coated on the back, the inner diameter of the cylindrical induction cavity 4 is 10mm, the depth of the cylindrical induction cavity is 1.6mm, and a layer of copper film is coated inside the cylindrical induction cavity 4. The cylindrical induction cavity 4 is positioned inside the omega-shaped open resonant ring 3; the circle center of the cylindrical induction cavity 4 is also positioned on the straight line at the two ends of the step-type microstrip transmission line 2;
(3) preparing the structure in the step (2) on the upper surface of the substrate 1 by adopting a screen printing process; firstly, placing a screen printing plate on the upper surface of a substrate 1, and printing a metamaterial structure pattern, wherein the line width of the step-type microstrip transmission line 2 is 1mm, and two ends of the step-type microstrip transmission line are positioned on the same straight line; the omega-shaped opening resonance ring 3 is positioned on the bent inner side of the step-shaped microstrip transmission line 2, the line width is 1mm, the inner diameter is 10mm, and the opening gap is 0.4 mm.
(4) Three alcohol substances of polyethylene glycol 300, polyethylene glycol 1500 and isopropanol are placed in the induction cavity 4, and microwave transmission parameters S21 are tested, wherein the performance parameters are shown in Table 1:
TABLE 1
Species of Ethylene glycol 300 Polyethylene glycol 1500 Isopropanol (I-propanol)
Microwave relative dielectric constant 9.5 2 6
Resonance frequency point (GHz) 1.45 1.95 1.67
Example 2:
a chemical liquid microwave sensor based on metamaterial comprises a substrate 1, a step-type microstrip transmission line 2, an omega-type open resonant ring 3, a cylindrical induction cavity 4 and a microstrip line ground wire 5; the upper surface structure is shown in fig. 1, and the lower surface structure is shown in fig. 2.
(1) The substrate 1 is made of one of the epoxy resins of FR4 type, with a thickness of 1.64 mm; the lower surface of the base 1 is coated with a copper film, namely a microstrip line ground wire 5.
(2) A cylindrical induction cavity 4 is processed on a substrate with the copper coated on the back, the inner diameter of the cylindrical induction cavity 4 is 10mm, the depth of the cylindrical induction cavity is 1.6mm, and a layer of copper film is coated inside the cylindrical induction cavity 4. The cylindrical induction cavity 4 is positioned inside the omega-shaped open resonant ring 3; the circle center of the cylindrical induction cavity 4 is also positioned on the straight line at the two ends of the step-type microstrip transmission line 2;
(3) preparing the structure in the step (2) on the upper surface of the substrate 1 by adopting a screen printing process; firstly, placing a screen printing plate on the upper surface of a substrate 1, and printing a metamaterial structure pattern, wherein the line width of the step-type microstrip transmission line 2 is 1mm, and two ends of the step-type microstrip transmission line are positioned on the same straight line; the omega-shaped opening resonance ring 3 is positioned on the bent inner side of the step-shaped microstrip transmission line 2, the line width is 1mm, the inner diameter is 10mm, and the opening gap is 0.5 mm.
(4) Liquid ammonia is placed in the induction cavity 4, microwave transmission parameters S21 of the liquid ammonia are tested, and the performance parameters are shown in Table 2:
TABLE 2
Species of Liquid ammonia
Microwave relative dielectric constant 67
Resonance frequency point (GHz) 2.32
Example 3:
a chemical liquid microwave sensor based on metamaterial comprises a substrate 1, a step-type microstrip transmission line 2, an omega-type open resonant ring 3, a cylindrical induction cavity 4 and a microstrip line ground wire 5; the upper surface structure is shown in fig. 1, and the lower surface structure is shown in fig. 2.
(1) The substrate 1 is made of one of the epoxy resins of FR4 type, with a thickness of 1.64 mm; the lower surface of the base 1 is coated with a copper film, namely a microstrip line ground wire 5.
(2) A cylindrical induction cavity 4 is processed on a substrate with the copper coated on the back, the inner diameter of the cylindrical induction cavity 4 is 10mm, the depth of the cylindrical induction cavity is 1.6mm, and a layer of copper film is coated inside the cylindrical induction cavity 4. The cylindrical induction cavity 4 is positioned inside the omega-shaped open resonant ring 3; the circle center of the cylindrical induction cavity 4 is also positioned on the straight line at the two ends of the step-type microstrip transmission line 2;
(3) preparing the structure in the step (2) on the upper surface of the substrate 1 by adopting a screen printing process; firstly, placing a screen printing plate on the upper surface of a substrate 1, and printing a metamaterial structure pattern, wherein the line width of the step-type microstrip transmission line 2 is 1mm, and two ends of the step-type microstrip transmission line are positioned on the same straight line; the omega-shaped opening resonance ring 3 is positioned on the bent inner side of the step-shaped microstrip transmission line 2, the line width is 1mm, the inner diameter is 10mm, and the opening gap is 0.5 mm.
(4) Purified water is placed in the induction cavity (4), microwave transmission parameters S21 of the purified water are tested, and the performance parameters are shown in Table 3:
TABLE 3
Species of Purified water
Microwave relative dielectric constant 78
Resonance frequency point (GHz) 2.22
The microwave transmission curves of the sensors in embodiments 1 to 3 for detecting various liquids are shown in fig. 3, and it can be seen from fig. 3 that different chemical liquids have their own resonance frequency points, so that the sensors of the present invention can effectively distinguish the chemical liquids.

Claims (6)

1.一种基于超材料的化学液体微波传感器，其特征在于，包括有基板（1）、台阶型微带传输线（2）、Ω型开口谐振环（3）、圆柱形感应腔体（4）、微带线地线（5）；在基板（1）的上表面开设一个圆柱形感应腔体（4）；在基板（1）上沿着圆柱形感应腔体（4）的轮廓边线开设Ω型开口谐振环（3），Ω型开口谐振环（3）上半部份的圆形区域与圆柱形感应腔体（4）共圆心，圆柱形感应腔体（4）位于Ω型开口谐振环（3）内部，圆柱形感应腔体（4）直径与Ω型开口谐振环（3）内径相同；在Ω型开口谐振环 （3）的上半圆外侧开设台阶型微带传输线（2），Ω型开口谐振环（3）位于台阶型微带传输线（2）弯曲内侧；圆柱形感应腔体（4）的圆心也位于台阶型微带传输线（2）两端所处的直线上；在基板的下表面覆上一层铜膜做为微带线地线（5）；1. A chemical liquid microwave sensor based on metamaterials, characterized in that it comprises a substrate (1), a stepped microstrip transmission line (2), an Ω-type split resonator ring (3), a cylindrical induction cavity (4) , a microstrip line ground line (5); a cylindrical induction cavity (4) is provided on the upper surface of the substrate (1); Ω is provided on the substrate (1) along the contour edge of the cylindrical induction cavity (4) Type split resonator (3), the circular area of the upper half of the Ω-type split resonator (3) is concentric with the cylindrical induction cavity (4), and the cylindrical induction cavity (4) is located in the Ω-type split resonator (3) Inside, the diameter of the cylindrical induction cavity (4) is the same as the inner diameter of the Ω-type split resonator ring (3); a stepped microstrip transmission line (2) is opened outside the upper semicircle of the Ω-type split resonator ring (3). The split resonator ring (3) is located inside the bend of the stepped microstrip transmission line (2); the center of the cylindrical induction cavity (4) is also located on the straight line where the two ends of the stepped microstrip transmission line (2) are located; The lower surface is covered with a layer of copper film as the ground wire of the microstrip line (5); 所述的圆柱形感应腔体（4）内部涂覆有一层铜膜；圆柱形感应腔体（4）的深度为基板（1）厚度的 97~99%。The cylindrical induction cavity (4) is internally coated with a layer of copper film; the depth of the cylindrical induction cavity (4) is 97-99% of the thickness of the substrate (1). 2.根据权利要求 1 所述的基于超材料的化学液体微波传感器，其特征在于：所述的基板（1）由 FR1、FR2、FR3、FR4、FR5、FR6 型号的环氧树脂中的一种制成。2. The metamaterial-based chemical liquid microwave sensor according to claim 1, wherein the substrate (1) is made of one of epoxy resins of FR1, FR2, FR3, FR4, FR5, and FR6 types production. 3.根据权利要求 1 所述的基于超材料的化学液体微波传感器，其特征在于：所述的台阶型微带传输线（2）、Ω型开口谐振环（3）是根据化学液体微波传感器的设计尺寸采用丝网印刷工艺在基板（1）上制得。3. The metamaterial-based chemical liquid microwave sensor according to claim 1, wherein the stepped microstrip transmission line (2) and the Ω-type split resonator ring (3) are designed according to the chemical liquid microwave sensor The dimensions are made on the substrate (1) using a screen printing process. 4.根据权利要求 2 所述的基于超材料的化学液体微波传感器，其特征在于：所述的在基板（1）上印刷台阶型微带传输线（2）、Ω型开口谐振环（3）、圆柱形感应腔体（4）的方法具体为：根据化学液体微波传感器的设计尺寸制备网版，在基板（1）上表面放置网版，然后通过丝网印刷工艺，即可得到对应的结构。4. The metamaterial-based chemical liquid microwave sensor according to claim 2, characterized in that: the step-type microstrip transmission line (2), the Ω-type split resonator ring (3), The method for the cylindrical induction cavity (4) is as follows: preparing a screen plate according to the design size of the chemical liquid microwave sensor, placing the screen plate on the upper surface of the substrate (1), and then performing a screen printing process to obtain a corresponding structure. 5.根据权利要求 1 所述的基于超材料的化学液体微波传感器在鉴别化学液体中的应用。5. The application of the metamaterial-based chemical liquid microwave sensor according to claim 1 in identifying chemical liquids. 6.根据权利要求5所述的基于超材料的化学液体微波传感器在鉴别化学液体中应用，其特征在于，所述的化学液体为聚乙二醇300、聚乙二醇 1500、异丙醇、液氨、水中的一种。6. The application of the metamaterial-based chemical liquid microwave sensor according to claim 5 in identifying chemical liquids, wherein the chemical liquids are polyethylene glycol 300, polyethylene glycol 1500, isopropanol, A kind of liquid ammonia and water.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016048257A1 (en) * 2014-09-24 2016-03-31 Bogazici Universitesi A biosensor with integrated antenna and measurement method for biosensing applications
US20170059492A1 (en) * 2015-08-28 2017-03-02 Saudi Arabian Oil Company Systems and Methods for Determining Water-Cut of a Fluid Mixture
CN107632193A (en) * 2017-09-28 2018-01-26 东南大学 A kind of microwave power detector based on metamaterial structure
CN109916925A (en) * 2019-04-09 2019-06-21 重庆大学 Liquid chemical detection sensor, detection device and detection method thereof
CN110398502A (en) * 2019-07-29 2019-11-01 西南大学 Microwave sensor based on double-entry resonant cavity and microfluidic technology
CN210133542U (en) * 2019-07-11 2020-03-10 四川省华兴装饰工程有限公司 Double-layer oil tank with detection device
CN210294108U (en) * 2019-03-13 2020-04-10 康特卫普技术有限公司 A microwave sensor and microwave signal processing system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016048257A1 (en) * 2014-09-24 2016-03-31 Bogazici Universitesi A biosensor with integrated antenna and measurement method for biosensing applications
US20170059492A1 (en) * 2015-08-28 2017-03-02 Saudi Arabian Oil Company Systems and Methods for Determining Water-Cut of a Fluid Mixture
CN107632193A (en) * 2017-09-28 2018-01-26 东南大学 A kind of microwave power detector based on metamaterial structure
CN210294108U (en) * 2019-03-13 2020-04-10 康特卫普技术有限公司 A microwave sensor and microwave signal processing system
CN109916925A (en) * 2019-04-09 2019-06-21 重庆大学 Liquid chemical detection sensor, detection device and detection method thereof
CN210133542U (en) * 2019-07-11 2020-03-10 四川省华兴装饰工程有限公司 Double-layer oil tank with detection device
CN110398502A (en) * 2019-07-29 2019-11-01 西南大学 Microwave sensor based on double-entry resonant cavity and microfluidic technology

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Metamaterial Sensor Design with Split Ring Resonators;Brinta Chowdhury 等;《2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting》;20200710;第733-734页 *
超材料在微波频段的研究进展与展望;郭经纬 等;《电子科学技术》;20170731;第4卷(第4期);第129-136页 *

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