CN109758147A - non-invasive microwave imaging device - Google Patents
non-invasive microwave imaging device Download PDFInfo
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- CN109758147A CN109758147A CN201811487082.1A CN201811487082A CN109758147A CN 109758147 A CN109758147 A CN 109758147A CN 201811487082 A CN201811487082 A CN 201811487082A CN 109758147 A CN109758147 A CN 109758147A
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- 238000003384 imaging method Methods 0.000 title claims abstract description 41
- 239000011159 matrix material Substances 0.000 claims abstract description 37
- 239000000758 substrate Substances 0.000 claims description 31
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 18
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 210000004556 brain Anatomy 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Abstract
The invention discloses a non-invasive microwave imaging device, which comprises a base, 16 fixing frames, 16 antennas, an electronic matrix control system, a PC (personal computer), a power supply and a vector network analyzer, wherein each antenna is respectively fixed on the fixing frames which correspond one to one, a first cavity for placing a measured object is formed in the center of the base, the electronic matrix control system comprises a control card and a first matrix switch connected with the control card, the 16 antennas are all connected with the first matrix switch, the vector network analyzer is connected with the first matrix switch, the PC is connected with the control card, the power supply is respectively connected with the control card and the first matrix switch, and the 16 fixing frames are arranged on the base in a surrounding mode by taking the first cavity as the center. The technical problem that an antenna of a microwave imaging system is easily touched by mistake to generate errors in the prior art is solved, and reliability is improved.
Description
Technical field
The invention belongs to microwave imaging field more particularly to a kind of non-invasive Apparatus of Microwave Imaging.
Background technique
Currently, microwave Non-invasive detection technology is gradually developed in Brian Imaging field, existing Brian Imaging system research work
Make to only relate to Antenna Design mostly, the direction of conventional configuration detector is developed to convenient for wearing, i.e., most of brain at
The device of picture is mostly all Worn type, but existing Antenna Design becomes increasingly complex, and Worn type is easy accidentally touching antenna, thus shadow
Sending and receiving signal is rung, and whole Apparatus of Microwave Imaging connecting line can be very more, there is the inconvenient technical problem of disassembly, reliability
It is low.
Therefore, the prior art is to be improved.
Summary of the invention
It is a primary object of the present invention to propose a kind of non-invasive Apparatus of Microwave Imaging, it is intended to solve to be mentioned in background technique
And the technical issues of, to improve reliability.
Non-invasive Apparatus of Microwave Imaging of the invention, including the control of pedestal, 16 fixed frames, 16 antennas, electronic matrix
System, PC machine, power supply and vector network analyzer, each antenna are separately fixed on an one-to-one fixed frame, pedestal
Center offer the first cavity for placing measurand, electronic matrix control system includes control card and connects with control card
The first matrix switch connect, 16 antennas are connect with the first matrix switch, and vector network analyzer and the first matrix switch connect
It connects, PC machine is connect with control card, and power supply is connect with control card and the first matrix switch respectively, and 16 fixed frames are with the first cavity
Center is set on pedestal in circulating type.
Preferably, the first matrix switch is connect by 16 SMA coaxial connectors with 16 antennas.
Preferably, antenna includes a medium substrate, a ground plane and a radiating surface, the ground plane and radiating surface
It is separately positioned on two opposite sides of medium substrate, the medium substrate is rectangle, and the length of the long side of medium substrate is
68-72mm, the length of short side are 65-70mm.
Preferably, the neighboring of the radiating surface and the neighboring of medium substrate are Chong Die.
Preferably, the center of radiating surface be hollow out axial symmetry polygon, the axial symmetry polygon of the hollow out include with
The first parallel side length of the long side of medium substrate, the second side length, and the third side length parallel with the short side of medium substrate, the 4th
Side length, wherein the first side length, the first side length respectively the shortest length apart from the long side of medium substrate be 1-5mm, third side length away from
The shortest length of short side from medium substrate is 8-12mm.
Preferably, fixed frame includes yoke.
Preferably, fixed frame includes first support, second support and circular sliding slopes portion, and first support and second support pass through
The connection of circular sliding slopes portion, first support are set on pedestal, and second support is fixed with antenna.
Preferably, second type chamber is offered on fixed frame.
Non-invasive Apparatus of Microwave Imaging of the invention is applied to test indoor Brian Imaging simulation, and measurand includes big
Brain model or human body brain, have the advantages that
1, based on pedestal, 16 antennas, the first matrix switch, control card setting, the transmitting-receiving of mutiple antennas can be controlled simultaneously, with
Portable type is compared, and measurand is placed in the first cavity in measurement process, stationary, can be avoided in measurement process by
In the error that portable antenna or brain model generate, high reliablity.
2, entire Apparatus of Microwave Imaging, only only used three piece-root grafting lines, i.e. USB port and 2 port SMA is coaxially connected
Device interface substantially increases the independence of each system, easy to disassemble, provides convenience during debugging or carrying.
Detailed description of the invention
Fig. 1 is the functional block diagram of non-invasive Apparatus of Microwave Imaging of the present invention；
Fig. 2 is the connection schematic diagram of pedestal, antenna, fixed frame in non-invasive Apparatus of Microwave Imaging of the present invention；
Fig. 3 is fixed rack structure schematic diagram in non-invasive Apparatus of Microwave Imaging of the present invention；
Fig. 4 is fixed frame schematic three dimensional views in non-invasive Apparatus of Microwave Imaging of the present invention；
Fig. 5 is the perspective structure figure of antenna in non-invasive Apparatus of Microwave Imaging of the present invention；
Fig. 6 is the upper surface schematic diagram of antenna in non-invasive Apparatus of Microwave Imaging of the present invention；
Fig. 7 is the lower surface schematic diagram of antenna in non-invasive Apparatus of Microwave Imaging of the present invention；
Fig. 8 is control card and the first matrix switch control interface schematic diagram in non-invasive Apparatus of Microwave Imaging of the present invention；
Fig. 9 is control card and the first matrix switch coaxial interface schematic diagram in non-invasive Apparatus of Microwave Imaging of the present invention；
Figure 10 is antenna gain curve graph in non-invasive Apparatus of Microwave Imaging of the present invention；
Figure 11 is antenna, fixed frame in non-invasive Apparatus of Microwave Imaging of the present invention, connection schematic diagram between pedestal.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
It should be noted that relational language such as " first ", " second " can be used for describing various assemblies, but these arts
Language is not intended to limit the component.These terms are only used to distinguish a component and another component.For example, not departing from model of the invention
It encloses, first assembly can be referred to as the second component, and the second component can also similarly be referred to as first assembly.Term " and/
Or " refer to continuous item and describe the combination of any one or more of item.
With reference to Fig. 1 and Fig. 2, Fig. 1 is the functional block diagram of non-invasive Apparatus of Microwave Imaging of the present invention；Fig. 2 is that the present invention is noninvasive
The connection schematic diagram of pedestal, antenna, fixed frame in type micro-wave imaging device.
Non-invasive Apparatus of Microwave Imaging of the invention, including pedestal 31,16 fixed frame 30,16 antenna 11, electronics square
Battle array control system, PC machine 14, power supply 13 and vector network analyzer 15, each antenna are separately fixed at one correspondingly admittedly
Determine on frame, the center of pedestal 31 offers the first cavity 32 for placing measurand 33, and electronic matrix control system includes
Control card 12 and 10,16 antennas of the first matrix switch connecting with control card 12 are connect with the first matrix switch 10, vector
Network Analyzer 15 is connect with the first matrix switch, and PC machine is connect with control card, power supply 13 respectively with control card and the first matrix
Switch 10 connects, and 16 fixed frames are set on pedestal 31 centered on the first cavity 32 in circulating type.Wherein, the type of control card
Number to grind magnificent USB-4751L, the first matrix switch is 2*16 unit；Non-invasive Apparatus of Microwave Imaging of the invention is applied to real
Indoor Brian Imaging simulation is tested, measurand includes brain model or human body brain, has the advantages that 1, the bottom of based on
Seat, the setting of 16 antennas, the first matrix switch, control card, can control the transmitting-receiving of mutiple antennas simultaneously, compared with portable type,
Measurand is placed in the first cavity in measurement process, stationary, can be avoided in measurement process due to portable antenna
Or the error that brain model generates, high reliablity.Specifically, the first matrix switch passes through 16 SMA coaxial connectors and 16
A antenna connection；The coupling part of first matrix switch and vector network analyzer is 2 port SMA coaxial connector interfaces；Control
The part that fabrication is connect with PC machine is the USB interface of Single port；2, entire Apparatus of Microwave Imaging only only used three piece-root grafting lines,
That is USB port and 2 port SMA coaxial connectors, substantially increase the independence between each structure, easy to disassemble, are debugging
Or convenience is provided during carrying.
Wherein, for the connection of control card and the first matrix switch, as shown in Figure 8 and Figure 9, control card is opened with the first matrix
It closes (SPDT and SP64T) control interface to be defined as follows shown in Fig. 8, the control port of SPDT is connected to the PB0- of Opto-22CN1
The port PC07；The control port of SP64T is connected to the port PB10 to PB15 and PC10-PC15 of Opto-22CN2；Control card with
First matrix switch (SPDT and SP64T) coaxial interface is defined as follows shown in Fig. 9.The control port of emission matrix is control card
The port PB10-PB15, the control port of receiving matrix are the port PC10-PC15 of control card.
As shown in Fig. 5, Fig. 6 and Fig. 7, antenna includes a medium substrate 1, a ground plane 2 and a radiating surface 3, institute
It states ground plane and radiating surface is separately positioned on two opposite sides of medium substrate, the medium substrate is rectangle, medium base
The length L of the long side m1 of plate is 68-72mm, and the length W of short side m2 is 65-70mm.Based on for antenna specific structure limit, when
For Antenna Operation in 1-3GHz, S11 is lower than -6dB, meets system integrated testability requirement, as shown in Figure 10, works frequently in 1-3Ghz
Duan Zhong, the gain of antenna substantially remain in 4-5.5dBi, and amplification efficiency is strong, and working frequency range is relatively low, in common frequency of living
Section in, can reduce electromagnetic radiation may the influence caused by people or other electronic equipments, can be applied to microwave imaging system
In system, bring benefit to the mankind.
Wherein, the medium substrate 1 is FR4 material, relative dielectric coefficient 4.4, with a thickness of 1.6mm.Outside radiating surface 3
Circumferential edges are Chong Die with the neighboring of medium substrate 1, and the center of radiating surface is the axial symmetry polygon of hollow out, the axis of the hollow out
Symmetric polygonal includes the first side length n1 parallel with the long side m1 of medium substrate, the second side length n2, and with medium substrate
Short side parallel third side length n3, the 4th side length n4, wherein the first side length, the first side length are respectively apart from the long side of medium substrate
Shortest length be 1-5mm, the shortest length of short side of the third side length apart from medium substrate is 8-12mm.
The neighboring of the radiating surface 3 is Chong Die with the neighboring of medium substrate 1, and the center of the radiating surface 3 is to engrave
Empty axial symmetry polygon, axial symmetry polygon include first side length parallel with the long side of medium substrate 1, the second side length, with
And the third side length parallel with the short side of medium substrate 1, the 4th side length, wherein the first side length n1, the first side length n2 distance respectively
The shortest length S of the long side m1 of medium substrate 1 is 1-5mm, the shortest length of short side m2 of the third side length n3 apart from medium substrate 1
Ld is 8-12mm；So that the overall dimensions of entire antenna are smaller, Miniaturization Design, size is small, the high gain of antenna, can
To be applied under some specific application scenarios, such as in tissue imaging medical application.
As shown in Fig. 3, Figure 11, it is preferable that fixed frame includes yoke, indicates the fixed structure made of timber；Fixed frame
Including first support 301, second support 303 and circular sliding slopes portion 302, first support 301 and second support 303 are connected by circular arc
Socket part 302 connects, and first support 301 is set on pedestal 31, and second support 303 and antenna 11 are fixed, specifically, on fixed frame
The second cavity 40 is offered, the second cavity is passed through for radio frequency coaxial cables and connect afterwards with antenna, avoids mixed and disorderly point of connecting line
Cloth；Fixed mount setting has movable pulley 60, to realize mobile back-and-forth motion of the antenna on pedestal, i.e. change aerial position, realizes
Adjust radiation efficiency intensity；Preferably, end face 3003 of the bottom surface 3001 of first support 301 perpendicular to second support 303, antenna
It is fixed on end face 3003, bottom surface 3001 is contradicted onto the top surface of pedestal 3300；So that after antenna is placed on end face 3003, energy
While enough alignments are placed in measurand 33 in the first cavity 32, also guarantee stability of the antenna relative to pedestal, in fact,
Based on this 16 antennas in specific test, it may be necessary to it is mobile, based between bottom surface 3001, end face 3003 vertical relation,
Bottom surface 3001 is contradicted onto the top surface of pedestal 3300, so that moving process is more steady, can be reduced because of portable antenna, antenna exists
Effect of signals in test process caused by fixed frame change in location.And it should be appreciated that antenna 11 specific structure, whole shape
Shape is plate-like, in mobile process, changes the position that antenna 11 is located at fixed frame, easily to influence to test.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (8)
1. a kind of non-invasive Apparatus of Microwave Imaging, which is characterized in that including pedestal, 16 fixed frames, 16 antennas, electronic matrix
Control system, PC machine, power supply and vector network analyzer, each antenna are separately fixed on an one-to-one fixed frame,
The center of pedestal offers the first cavity for placing measurand, electronic matrix control system include control card and with control
Block the first matrix switch of connection, 16 antennas are connect with the first matrix switch, and vector network analyzer is opened with the first matrix
Connection connects, and PC machine is connect with control card, and power supply is connect with control card and the first matrix switch respectively, and 16 fixed frames are with the first sky
It is set on pedestal centered on chamber in circulating type.
2. non-invasive Apparatus of Microwave Imaging as described in claim 1, which is characterized in that the first matrix switch is same by 16 SMA
Mandrel connector is connect with 16 antennas.
3. non-invasive Apparatus of Microwave Imaging as described in claim 1, which is characterized in that antenna include a medium substrate, one
Ground plane and a radiating surface, the ground plane and radiating surface are separately positioned on two opposite sides of medium substrate, described
Medium substrate is rectangle, and the length of the long side of medium substrate is 68-72mm, and the length of short side is 65-70mm.
4. non-invasive Apparatus of Microwave Imaging as claimed in claim 3, which is characterized in that the neighboring of the radiating surface and medium
The neighboring of substrate is overlapped.
5. non-invasive Apparatus of Microwave Imaging as claimed in claim 4, which is characterized in that the center of radiating surface is the axial symmetry of hollow out
Polygon, the axial symmetry polygon of the hollow out include first side length parallel with the long side of medium substrate, the second side length, and
The third side length parallel with the short side of medium substrate, the 4th side length, wherein the first side length, the first side length are respectively apart from medium base
The shortest length of the long side of plate is 1-5mm, and the shortest length of short side of the third side length apart from medium substrate is 8-12mm.
6. non-invasive Apparatus of Microwave Imaging as described in claim 1, which is characterized in that fixed frame includes yoke.
7. non-invasive Apparatus of Microwave Imaging as described in claim 1, which is characterized in that fixed frame includes first support, second
Frame and circular sliding slopes portion, first support and second support are connected by circular sliding slopes portion, and first support is set on pedestal, and second
Bracket is fixed with antenna.
8. non-invasive Apparatus of Microwave Imaging as described in claim 1, which is characterized in that offer second type chamber on fixed frame.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811487082.1A CN109758147A (en) | 2018-12-06 | 2018-12-06 | non-invasive microwave imaging device |
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| CN201811487082.1A CN109758147A (en) | 2018-12-06 | 2018-12-06 | non-invasive microwave imaging device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113647929A (en) * | 2021-08-17 | 2021-11-16 | 电子科技大学 | Wearing equipment for microwave axial tomography brain imaging |
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|---|---|---|---|---|
| CN103887603A (en) * | 2014-03-26 | 2014-06-25 | 广东泰阳通信设备有限公司 | Minimized monopole antenna |
| US20160149306A1 (en) * | 2014-11-25 | 2016-05-26 | Metal Industries Research & Development Centre | Microstrip antenna structure and microwave imaging system using the same |
| CN204287071U (en) * | 2014-12-30 | 2015-04-22 | 宜昌海鸥仪器设备有限公司 | A kind of microwave laminated imaging device based on 3D antenna |
| CN204287070U (en) * | 2014-12-30 | 2015-04-22 | 宜昌海鸥仪器设备有限公司 | A kind of microwave laminated imaging device based on mushroom antenna |
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| CN113647929B (en) * | 2021-08-17 | 2023-10-31 | 电子科技大学 | Wearing equipment for microwave axial tomography brain imaging |
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