CN106839965A - Label, measuring system and its application process for measuring metal component surface strain - Google Patents
Label, measuring system and its application process for measuring metal component surface strain Download PDFInfo
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- CN106839965A CN106839965A CN201710147363.1A CN201710147363A CN106839965A CN 106839965 A CN106839965 A CN 106839965A CN 201710147363 A CN201710147363 A CN 201710147363A CN 106839965 A CN106839965 A CN 106839965A
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- antenna
- label
- rfid
- radiation patch
- metal component
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 47
- 239000002184 metal Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000008569 process Effects 0.000 title claims abstract description 6
- 230000005855 radiation Effects 0.000 claims abstract description 42
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 238000005516 engineering process Methods 0.000 claims abstract description 11
- 238000013461 design Methods 0.000 claims abstract description 5
- 230000004913 activation Effects 0.000 claims description 6
- 229910000679 solder Inorganic materials 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 238000013459 approach Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0723—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10019—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers.
- G06K7/10108—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. interrogating only those RFIDs that fulfill a predetermined requirement, e.g. selecting all RFIDs having the same speed and moving in a cloud like fashion, e.g. on the same train; interrogating only RFIDs having a certain predetermined temperature, e.g. in the same fridge, another possibility being the active ignoring of a group of tags that fulfill a predetermined requirement, equivalent to the Boolean NOT operation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Computer Networks & Wireless Communication (AREA)
- Toxicology (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Electromagnetism (AREA)
- General Health & Medical Sciences (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The present invention discloses a kind of for measuring label, measuring system and its application process that metal component surface is strained.It is limitation active, wired in the traditional strain transducer of breakthrough, the present invention is using radio frequency identification (Radio Frequency Identification, RFID) technology provides a kind of new approaches for the design of strain transducer, it is possible to achieve without outside cable power, contactless strain measurement.The present invention is used to measure the rfid system of metal component surface strain measurement, the system is constituted by reader and for measuring the label of metal component surface strain, the label for being wherein used to measure metal component surface strain is fixed on tested hardware, and label includes RFID antenna, chip.Described RFID antenna includes upper radiation patch, lower radiation patch, dielectric-slab, matched line, label is bonded in the metal surface of the tested hardware by the lower radiation patch of RFID antenna, and the chip is connected by matched line with described upper radiation patch, lower radiation patch.
Description
Technical field
The present invention relates to a kind of fields of measurement of metal component surface strain.
Background technology
Conventional strain transducer has resistance strain plate, vibrating string extensometer and Bragg grating sensor at present.Electricity
Strain variation can be converted to resistance variations by resistive foil gauge, and be further converted into voltage or curent change by electric bridge；
Vibrating string extensometer carries out strain measurement using the resonant frequency of string with the relation of strain；The principle of Bragg grating sensor
It is the drift theory based on fiber grating bragg wavelength.These strain transducers have the advantages that itself, in Practical Project
Suitable strain transducer can be selected according to field condition in, but they also have the shortcomings that to overcome：Sensor cloth
Put with signal acquisition by the way of wired, operation is complicated, lead is numerous, collecting device is expensive, although using one at present
A little such as Zigbee, Wifi communications are improved, but can't fundamentally overcome this shortcoming；Adopted in signal
Real-time power supply is needed to power during collection, and structure may occur the problem of power supply failure when disaster is experienced, and cause signal
Acquisition system cannot obtain data when disaster occurs.
The content of the invention
To overcome the shortcomings of such scheme, the present invention discloses a kind of label, survey for measuring metal component surface strain
Amount system and its application process.
It is limitation active, wired in the traditional strain transducer of breakthrough, the present invention is using radio frequency identification (Radio
Frequency Identification, RFID) technology provides a kind of new approaches for the design of strain transducer, it is possible to achieve
Without outside cable power, contactless strain measurement.
Technical scheme one
The present invention is used to measure the rfid system of metal component surface strain measurement, and the system is by reader 8 and for surveying
The label 10 of amount metal component surface strain is constituted,
The label 10 for being wherein used to measure metal component surface strain is fixed on tested hardware 1, and label 10 is included
RFID antenna, chip 2.Described RFID antenna includes upper radiation patch 31, lower radiation patch 32, dielectric-slab 4, matched line 5, mark
10 metal surfaces that the tested hardware 1 is bonded in by the lower radiation patch 32 of RFID antenna are signed, the chip 2 passes through
Matched line 5 is connected with described upper radiation patch 31, lower radiation patch 32.
In strain measurement, the RFID antenna on the label 10 plays a part of sensing unit.Become when label 10 experiences
During shape, the size of antenna can change, and its resonant frequency can drift about；RFID reader 8 detects RFID by its antenna 9
The resonant frequency drift of label 10, and calculate the strain of the experience of the antenna on tested hardware 1.
Further refinement technology scheme, the RFID antenna also includes conducting resinl 6, and lower radiation patch 32 is bonded in the quilt
Realized using the conducting resinl 6 metal surface for surveying hardware 1.
The performance of RFID formula strain transducers is relevant with the species of antenna on label, the antenna on label is optimized and is set
Meter can reduce the size of sensor and improve its sensitivity.For example, using 1/2nd wavelength rectangular paster antennas or four points
One of wavelength rectangular paster antenna.
Further optimization, compared with 1/2nd wavelength rectangular paster antennas, the present invention pastes 1/2nd wavelength rectangulars
Chip antenna is changed to quarter-wave rectangular patch antenna as preferred embodiment, such that it is able to size sensor is reduced
Half doubles the sensitivity of sensor.The present invention makes quarter-wave rectangular patch antenna, can use following
Any one mode is realized：
1. some vias are beaten in 1/2nd wavelength rectangular paster antenna one end, and painting conductive material will be upper on via arm
Lower radiation patch short circuit；
2. lateral short-circuit wall is added by the short circuit of upper and lower radiation patch in antenna side, can be by 1/2nd wavelength rectangular pasters
Antenna is changed into quarter-wave rectangular patch antenna；
3. also rectangular patch antenna can be connected with metal component surface using solder technology substitute with conducting resinl general
Rectangular patch antenna is pasted onto metal component surface.(being optimal implementation method)
Technical scheme two
A kind of label 10 for measuring metal component surface strain, is fixed on tested hardware 1, and label 10 is included
RFID antenna, chip 2.Described RFID antenna includes upper radiation patch 31, lower radiation patch 32, dielectric-slab 4, matched line 5, mark
10 metal surfaces that the tested hardware 1 is bonded in by the lower radiation patch 32 of RFID antenna are signed, the chip 2 passes through
Matched line 5 is connected with described upper radiation patch 31, lower radiation patch 32.
Technical scheme three
A kind of application process for measuring metal component surface strain, comprises the following steps：
Step one, using radio frequency identification (Radio Frequency Identification, RFID) Technology design
Go out strain transducer, for being mounted on measured metal component surface.The strain transducer structure is the label
10 structure.
Step 2, when metal component surface strain measurement is measured, to realize the rectangular patch day of 1/2nd wavelength
Line is converted into quarter-wave rectangular patch antenna, using solder technology, by the upper radiation patch of antenna and tested metal structure
Part surface is connected by weld seam, makes the upper and lower radiation patch short circuit of rectangular patch antenna, forms quarter-wave rectangular patch day
Line.
Step 3, RFID reader launches modulated electromagnetic wave signal with different frequencies to RFID label tag, works as RFID
When the signal power that label is received reaches threshold value, the chip in RFID label tag can be activated.Readding required for activation label
Read device minimum emissive power PminF () is relevant with reader institute emission signal frequency f, the rectangle patch in reader is with RFID label tag
F during chip antenna resonant frequency transmission signalR, the minimum emissive power P needed for activation labelmin(fR) minimum.Made most by finding
Small transmission power reaches the tranmitting frequency of minimum value, you can determine the resonant frequency f of antenna in RFID label tagR。
Step 4, when antenna experiences to be strained, the drift of its resonant frequency, when antenna experiences strain stress in the longitudinal direction,
Resonant frequency fRPresentation linear approximate relationship will be strained, is given shown in equation below
C is the light velocity in vacuum, ε in formulaeBe dielectric-slab relative dielectric it is normal
Number, L is upper radiation patch length, fROIt is resonant frequency of the antenna under initial strain state.By determining that resonant frequency is drifted about
Amount, can calculate the strain that outgoing label is experienced.
The 1. strain for being applied to the conductive metal component surface of measurement of the invention, including but not limited to steel construction,
Constructed of aluminium.
2. must by the rectangular patch antenna conducting resinl of 1/2nd wavelength by its be pasted on metal surface or and metal
Surface soldered, conducting resinl includes but is not limited to LED conductive silver glues etc..
3. it is connected with metal surface using the upper radiation patch of weld seam antenna, solder flux includes but is not limited to the weldering of copper aluminium medicine core
Silk.
4. ensure that above-mentioned all connection electric conductivities are good.
The beneficial effect that technical scheme is brought：
1. sensing unit of 1/2nd wavelength rectangular paster antennas as sensor is compared, using quarter-wave square
Shape paster antenna, can reduce size sensor or improve transducer sensitivity；
2. short circuit is carried out using welding method so that strain transducer is hardly damaged than stronger；
5. original scheme needs to be processed in antenna processing factory, and this programme relaxes processing limitation, can be in conventional environment
Processing.
Brief description of the drawings
Fig. 1 is whole system schematic diagram.
Fig. 2 is the label schematic diagram of preferred embodiment.
Tested hardware 1, chip 2, upper radiation patch 31, lower radiation patch 32, dielectric-slab 4, matched line 5, conducting resinl
6th, weld seam 7, reader 8, reader antenna 9, the label 10 for measuring metal component surface strain
Specific embodiment
A step introduction is done to technical solution of the present invention below in conjunction with accompanying drawing.
Embodiment
Present system is made up of RFID label tag and RFID reader.RFID label tag is attached to tested metal structure by conducting resinl
Part surface, in an rfid tag, as sensing unit, quilt is worked as using by the quarter-wave rectangular patch antenna of weld seam short circuit
When surveying metal component surface experience strain, patch antenna size changes and causes resonant frequency to be drifted about；Label is carried in chip
Coding information, using RFID reader to label transmitting modulation electromagnetic wave signal, the coding of the label can be recognized, when
During RFID reader sweep limits arrangement multiple RFID label tag, reader can mark each measuring point according to the coding of each label
Strain value.
The RFID that the system is used is by particular design, and its measurement metal component surface stress change principle is as follows：RFID reads
Read device and modulated electromagnetic wave signal launched to RFID label tag with different frequencies, when RFID tag to signal power reach
During to threshold value, the chip in RFID label tag can be activated.Reader minimum emissive power P required for activation labelmin(f)
It is relevant with reader institute emission signal frequency f, the rectangular patch antenna resonant frequency transmission signal in reader is with RFID label tag
When fR, the minimum emissive power P needed for activation labelmin(fR) minimum.Minimum emissive power is set to reach minimum value by finding
Tranmitting frequency, you can determine the resonant frequency of antenna in RFID label tag.
When antenna experiences to be strained, the drift of its resonant frequency, when antenna experiences strain stress in the longitudinal direction, resonance is frequently
Rate fRPresentation linear approximate relationship will be strained, is given shown in equation below
C is the light velocity in vacuum, ε in formulaeBe dielectric-slab relative dielectric it is normal
Number, L is upper radiation patch length, fROIt is resonant frequency of the antenna under initial strain state.By determining resonant frequency drifts
Shifting amount, can calculate the strain that outgoing label is experienced.
Optimum embodiment
Aim to provide a kind of simple and reliable, convenient processing, the rectangular patch antenna by 1/2nd wavelength of Applied economy
Short circuit, is made quarter-wave rectangular patch antenna, for measuring metal component surface strain.
When metal component surface strain measurement is measured, to realize being converted into the rectangular patch antenna of 1/2nd wavelength
Quarter-wave rectangular patch antenna, technical solution of the present invention is first by the rectangular patch antenna conducting resinl of 1/2nd wavelength
It is pasted onto tested metal component surface；Solder technology is recycled, the upper radiation patch and tested metal component surface of antenna are led to
Weld seam 7 is crossed to be connected.Ensure that conducting resinl and weld seam electric conductivity are good, you can make the upper and lower radiation patch short circuit of rectangular patch antenna,
Form quarter-wave rectangular patch antenna.
Claims (6)
1. a kind of rfid system for measuring metal component surface strain measurement, it is characterised in that the system is by reader (8)
Constituted with for measuring the label (10) of metal component surface strain,
The label (10) for being wherein used to measure metal component surface strain is fixed on tested hardware (1), and label (10) is included
RFID antenna, chip (2)；Described RFID antenna include upper radiation patch (31), lower radiation patch (32), dielectric-slab (4),
Distribution (5), label (10) is bonded in the metal watch of the tested hardware (1) by the lower radiation patch (32) of RFID antenna
Face, the chip (2) is connected by matched line (5) with described upper radiation patch (31), lower radiation patch (32).
2. the system as claimed in claim 1, it is characterised in that the RFID antenna also includes conducting resinl (6), lower radiation patch
(32) realized using the conducting resinl (6) metal surface for being bonded in the tested hardware (1).
3. the system as claimed in claim 1, it is characterised in that use 1/2nd wavelength rectangular paster antennas or a quarter
Wavelength rectangular paster antenna.
4. the system as claimed in claim 1, it is characterised in that make quarter-wave rectangular patch antenna, can use with
Lower any one mode is realized：
Beat some vias in 1/2nd wavelength rectangular paster antenna one end, and conductive material is applied on via arm to radiate up and down
Paster short circuit；Or
Lateral short-circuit wall is added by the short circuit of upper and lower radiation patch in antenna side, 1/2nd wavelength rectangular paster antennas can be become
It is quarter-wave rectangular patch antenna；Or
Rectangular patch antenna is being connected with metal component surface using solder technology substitute rectangular patch day with conducting resinl
Line is pasted onto metal component surface.
5. it is a kind of for measuring the label (10) that metal component surface is strained, it is characterised in that to be fixed on tested hardware
(1), label (10) includes RFID antenna, chip (2)；Described RFID antenna includes upper radiation patch (31), lower radiation patch
(32), dielectric-slab (4), matched line (5), label (10) are bonded in the tested gold by the lower radiation patch (32) of RFID antenna
The metal surface of metal elements (1), the chip (2) is by matched line (5) and described upper radiation patch (31), lower radiation patch
(32) connect.
6. it is a kind of for measuring the application process that metal component surface is strained, it is characterised in that to comprise the following steps：
Step one, being gone out using radio frequency identification (Radio Frequency Identification, RFID) Technology design should
Become sensor, for being mounted on measured metal component surface.The strain transducer structure is the label (10)
Structure.
Step 2, when metal component surface strain measurement is measured, to realize turning the rectangular patch antenna of 1/2nd wavelength
Quarter-wave rectangular patch antenna is turned to, using solder technology, by the upper radiation patch of antenna and tested hardware table
Face is connected by weld seam, makes the upper and lower radiation patch short circuit of rectangular patch antenna, forms quarter-wave rectangular patch antenna.
Step 3, RFID reader launches modulated electromagnetic wave signal with different frequencies to RFID label tag, works as RFID label tag
When the signal power for receiving reaches threshold value, the chip in RFID label tag can be activated.Reader required for activation label
Minimum emissive power PminF () is relevant with reader institute emission signal frequency f, the rectangular patch day in reader is with RFID label tag
F during line resonant frequency transmission signalR, the minimum emissive power P needed for activation labelmin(fR) minimum.Make minimum hair by finding
Penetrate the tranmitting frequency that power reaches minimum value, you can determine the resonant frequency f of antenna in RFID label tagR。
Step 4, when antenna experiences to be strained, the drift of its resonant frequency, when antenna experiences strain stress in the longitudinal direction, resonance
Frequency fRPresentation linear approximate relationship will be strained, is given shown in equation below
In formula, c is the light velocity in vacuum, εeIt is the relative dielectric constant of dielectric-slab, L is upper radiation patch length, fROIt is antenna
Resonant frequency under initial strain state.By determining resonant frequency drift amount, the strain that outgoing label is experienced can be calculated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710147363.1A CN106839965A (en) | 2017-03-13 | 2017-03-13 | Label, measuring system and its application process for measuring metal component surface strain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710147363.1A CN106839965A (en) | 2017-03-13 | 2017-03-13 | Label, measuring system and its application process for measuring metal component surface strain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106839965A true CN106839965A (en) | 2017-06-13 |
Family
ID=59143441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710147363.1A Pending CN106839965A (en) | 2017-03-13 | 2017-03-13 | Label, measuring system and its application process for measuring metal component surface strain |
Country Status (1)
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| CN (1) | CN106839965A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656015A (en) * | 2017-09-15 | 2018-02-02 | 武汉理工大学 | A kind of CFRP reinforces the end degumming detection means and method of steel construction |
| CN107883898A (en) * | 2017-11-09 | 2018-04-06 | 北京卫星环境工程研究所 | The real-time high-precision measuring method of satellite structure thermal deformation |
| CN107946759A (en) * | 2017-11-15 | 2018-04-20 | 北京工业大学 | A kind of array strain transducer based on microstrip antenna formula RFID tag |
| CN108593713A (en) * | 2018-04-20 | 2018-09-28 | 武汉理工大学 | Passive and wireless paster antenna sensor based on RFID technique and wireless measurement method |
| CN109211978A (en) * | 2018-07-26 | 2019-01-15 | 中国人民解放军陆军装甲兵学院 | A kind of crackle sensing label and method |
| CN109780984A (en) * | 2019-01-21 | 2019-05-21 | 同济大学 | Separate type crack sensors and separate type crack sensing system based on RFID |
| CN110030917A (en) * | 2019-04-15 | 2019-07-19 | 同济大学 | Using the passive and wireless displacement sensor and displacement sensing system of circular patch antenna |
| CN111197956A (en) * | 2020-02-21 | 2020-05-26 | 青岛理工大学 | Strain measurement system and test method |
| CN111226088A (en) * | 2017-11-30 | 2020-06-02 | 沙特***石油公司 | Flexible strip antenna array for tank volume calibration and resonant frequency shift measurement method using the same |
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| CN112556564A (en) * | 2020-12-01 | 2021-03-26 | 同济大学 | Passive wireless deformation sensor and monitoring system based on double-layer patch antenna |
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| CN113203372A (en) * | 2021-04-20 | 2021-08-03 | 同济大学 | Structure bidirectional strain monitoring sensor and system based on eccentric feed patch antenna |
| CN113391092A (en) * | 2021-05-21 | 2021-09-14 | 同济大学 | Structural acceleration detection device based on coupling patch antenna |
| CN113465491A (en) * | 2021-07-01 | 2021-10-01 | 四川大学 | Strain sensing monitoring system and method based on miniaturized label sensor array |
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