CN107747900A - A kind of strain based on binary patch antenna array and crackle solution decoupling measuring device and method - Google Patents
A kind of strain based on binary patch antenna array and crackle solution decoupling measuring device and method Download PDFInfo
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- CN107747900A CN107747900A CN201710832322.6A CN201710832322A CN107747900A CN 107747900 A CN107747900 A CN 107747900A CN 201710832322 A CN201710832322 A CN 201710832322A CN 107747900 A CN107747900 A CN 107747900A
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- 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
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- 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
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- 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
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- Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
Abstract
The invention discloses a kind of strain based on binary patch antenna array and crackle solution decoupling measuring device and method, this method comprises the following steps：S1, will compensation antenna and measurement antenna be respectively adhered on body structure surface to be measured；To compensation antenna and measurement antenna transmitting purpose sweep frequency electromagnetic ripple, its resonant frequency is obtained according to the signal reflected in real time respectively for S2, wireless interrogation device；S3, when body structure surface to be measured occur crackle when, the earth plate for compensating antenna has isolated influence of the body structure surface crackle to be measured to its resonant frequency, only perceive strain, measurement antenna perceive strain and crackle integrated information；According to compensation antenna and the real-time resonant frequencies of measurement antenna, with reference to its length and original resonance frequency, strain and the decoupling of crack information are realized.The present invention is realized using paster antenna to decoupling of the metal structure surface strain with crack information and accurate measurement, and has the advantages that apparatus structure is simple, is connected without wire.
Description
Technical field
The present invention relates to the strain of metal structure and crackle fields of measurement, more particularly to one kind to be based on binary patch antenna array
The strain of row and crackle solution decoupling measuring device and method.
Background technology
Common metal structure health monitoring sensor includes foil gage, fibre optical sensor, sonac etc., this
A little sensors can meet the needs of engineer applied to a certain extent, but there is also cable connection, with high costs, device is complicated etc.
Shortcoming.In recent years, domestic and foreign scholars propose strain and the crackle fields of measurement that micro-strip paster antenna is used for metal structure.Micro-strip
Paster antenna has the characteristics that simple structure, in light weight, production cost is low, passive wireless inquiry, easily conformal with curved surface, can be effective
Overcome the shortcomings of the sensor, there is good future in engineering applications.
At present, paster antenna measuring strain not yet enters engineering reality with crackle, is only in laboratory development.It is existing
Some results of study show, when paster antenna is as strain transducer, its resonant frequency linearly reduces as strain increases；Make
For crack sensor when, its resonant frequency with crack change and change, to a certain extent the length of measurable crackle and
Direction.However, the observation index of paster antenna measuring strain and crackle is resonant frequency change, when the metal knot for reality
During structure, paster antenna sensor will be influenceed by structural strain and crackle simultaneously, then strain and resonant frequency caused by crackle
Change is mutually coupled, and easily causes strain and the erroneous judgement of Crack Parameters.This coupling effect greatly will hinder paster antenna to sense
The engineer applied of device and popularization, when particularly requiring higher to strain and crackle measurement accuracy, suitable decoupling measurement method shows
Obtain particularly necessary.
The content of the invention
The technical problem to be solved in the present invention is for being difficult to accurate measurement metal structure surface stress in the prior art
And the defects of Crack Parameters, there is provided a kind of strain based on binary patch antenna array and crackle solution decoupling measuring device and method.
The technical solution adopted for the present invention to solve the technical problems is：
The present invention provides a kind of strain based on binary patch antenna array and crackle solution decoupling measuring device, and the device includes
Antenna, measurement antenna and wireless interrogation device are compensated, compensation antenna and measurement antenna are that two structure snd size differ
Rectangular patch antenna, compensation antenna and measurement antenna are respectively adhered on body structure surface to be measured；Compensate antenna and measurement antenna is equal
For cavity resonator structure, wireless interrogation device is respectively to compensation antenna and measurement antenna transmitting purpose sweep frequency electromagnetic ripple, according to reflecting
Signal obtain its resonant frequency respectively, and then obtain pasting the strain size at measurement antenna according to resonant frequency decoupling measurement
With the crack below paster.
Further, compensation antenna of the invention includes radiation patch, matrix and earth plate, and matrix is arranged on radiation patch
Between earth plate, body structure surface to be measured will be pasted below earth plate by super glue.
Further, the material of the matrix of compensation antenna of the invention is FR4, and the material of radiation patch and earth plate is
Copper, the upper and lower surface that FR4 matrix is deposited copper to using printed circuit board technology are made.
Further, measurement antenna of the invention includes radiation patch and matrix, will be viscous below matrix by super glue
It is attached to body structure surface to be measured.
Further, the material of the matrix of measurement antenna of the invention is FR4, and the material of radiating antenna is copper, using print
The upper surface that printed circuit board technique deposits copper to FR4 matrix is made.
Further, wireless interrogation device of the invention includes horn antenna, radio frequency circulator, Network Analyzer and data
Processing module, for accessing compensation antenna and measurement antenna and obtaining the real-time resonant frequencies of the two.
The present invention provides a kind of strain based on binary patch antenna array and crackle decoupling measurement method, including following step
Suddenly：
S1, in body structure surface to be detected, compensation antenna and measurement antenna are respectively adhered on body structure surface to be measured, point
Antenna Ji Lu not compensated and measure the original resonance frequency of antenna；
S2, wireless interrogation device are in real time to compensation antenna and measurement antenna transmitting purpose sweep frequency electromagnetic ripple, according to what is reflected
Signal obtains its resonant frequency respectively；
S3, when body structure surface to be measured occur crackle when, the earth plate for compensating antenna has isolated body structure surface crackle pair to be measured
The influence of its resonant frequency, only perceives strain, and measurement antenna perceives strain and crackle integrated information；According to compensation antenna and measurement
The real-time resonant frequencies of antenna, with reference to its original resonance frequency, realize that strain and the decoupling of crack information measure.
Further, strain is calculated in step S3 of the invention and the method for crack information is：
Obtain compensation antenna and measure the real-time resonant frequencies f of antennaAAnd fBAfterwards, strain size is calculated according to below equation
ε：
Wherein, the original resonance frequency for compensating antenna is f0A, the strain sensitivity for compensating antenna is sAε；
And then isolate resonant frequency caused by crackle and be：
Wherein, the original resonance frequency for measuring antenna is f0B, the strain sensitivity for measuring antenna is sBε。
The beneficial effect comprise that：The strain based on binary patch antenna array of the present invention is surveyed with crackle decoupling
Measure device and method, by be pasted onto body structure surface to be measured compensation antenna and measurement antenna, realize metal structure strain and
The separation of crack information, by wireless interrogation device to compensation antenna and measurement antenna real time emission purpose sweep frequency electromagnetic ripple, according to anti-
It is emitted back towards the signal come and obtains its resonant frequency respectively, and then answering for body structure surface to be measured is accurately calculated according to resonant frequency
Power and crack, the present invention is simple in construction, and cost is low, the problem of wirelessly overcoming difficult wiring in conventional method,
And single paster antenna sensor measuring strain and the coupling effect of crackle are overcome, it is accurate to ensure that strain measures with crackle
Property.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is the structural representation and its wireless interrogation device of the compensation antenna of the embodiment of the present invention；
Fig. 3 is the schematic diagram of the specific embodiment of the present invention；
In figure, 1- compensation antennas, 2- measurement antennas, 3- wireless interrogation devices.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
As shown in figure 1, the strain based on binary patch antenna array of the embodiment of the present invention and crackle solution decoupling measuring device,
The device includes compensation antenna 1, measurement antenna 2 and wireless interrogation device 3, compensation antenna 1 and measurement antenna 2 be two structures and
The rectangular patch antenna that size differs, compensation antenna 1 and measurement antenna 2 are respectively adhered on body structure surface to be measured；Compensation
Antenna 1 and measurement antenna 2 are cavity resonator structure, and wireless interrogation device 3 is swept to compensation antenna 1 and the measurement transmitting of antenna 2 respectively
Frequency electromagnetic waves, its resonant frequency is obtained according to the signal reflected respectively, and then measurement is decoupled according to resonant frequency and glued
Strain size at patch measurement antenna 2 and the crack below paster.
Compensation antenna 1 and measurement antenna 2 have different original resonance frequencies, and the area of measurement antenna 2 is more than compensation day
The area of line 1, measurement antenna 2 is set to cover more measurement areas.
Compensation antenna 1 includes radiation patch, matrix and earth plate, and matrix is arranged between radiation patch and earth plate, leads to
Body structure surface to be measured will be pasted below earth plate by crossing super glue.The material for compensating the matrix of antenna 1 is FR4, radiation patch
Material with earth plate is copper, and the upper and lower surface that FR4 matrix is deposited copper to using printed circuit board technology is made.
Measurement antenna 2 includes radiation patch and matrix, and body structure surface to be measured will be pasted below matrix by super glue.
The material for measuring the matrix of antenna 2 is FR4, and the material of radiating antenna is copper, and FR4 is deposited copper to using printed circuit board technology
The upper surface of matrix is made.
Wireless interrogation device 3 includes horn antenna, radio frequency circulator, Network Analyzer and data processing module, for visiting
Ask compensation antenna and measurement antenna and obtain the real-time resonant frequencies of the two.
The strain based on binary patch antenna array of the embodiment of the present invention and crackle decoupling measurement method, including following step
Suddenly：
S1, in body structure surface to be detected, compensation antenna and measurement antenna are respectively adhered on body structure surface to be measured, point
Antenna Ji Lu not compensated and measure the original resonance frequency of antenna；
S2, wireless interrogation device are in real time to compensation antenna and measurement antenna transmitting purpose sweep frequency electromagnetic ripple, according to what is reflected
Signal obtains its resonant frequency respectively；
S3, when body structure surface to be measured occur crackle when, the earth plate for compensating antenna has isolated body structure surface crackle pair to be measured
The influence of its resonant frequency, only perceives strain, and measurement antenna perceives strain and crackle integrated information；According to compensation antenna and measurement
The real-time resonant frequencies of antenna, with reference to its original resonance frequency, realize that strain and the decoupling of crack information measure.
Using above-mentioned device, the present invention is realized by following principle.
If the radiation patch operative orientation length for compensating antenna and measurement antenna is respectively L0AAnd L0B, matrix FR4 dielectric
Constant is β, and the light velocity in vacuum is c.Then the original resonance frequency of two sensors is respectively f0AAnd f0B, its expression formula is：
When metal structure is in a certain working condition, binary patch antenna array bears to strain with structure.Due to carrying
Earth plate, compensation antenna can isolated metal structure face crack influence, its resonant frequency only changes with strain；And measure day
Line is simultaneously strained and the influence of metal structure surface crackle, its resonant frequency contain the synthesis of strain and crackle in changing
Information.If the strain under this working condition is ε, and measures the crackle existed below antenna perpendicular to its operative orientation, then now
The radiation patch of compensation antenna bears to strain, and its resonant frequency is changed into fA；The radiation patch of measurement antenna bears strain and its electricity
Flow path is disturbed by crackle, and resonant frequency is changed into fB。fAAnd fBExpression formula be (Δ L in formulaAε、ΔLBεRepresent that strain is drawn
The electrical length change of the compensation antenna and measurement antenna that rise, Δ LBcrackRepresent that the electrical length of measurement antenna caused by crackle becomes
Change)：
If the strain sensitivity for compensating antenna is sAε, the strain sensitivity for measuring antenna is sBε, measure antenna crackle length
Degree sensitivity is sBcrack, after the completion of the design of binary patch antenna array, sAε、sBεAnd sBcrackIt is known parameters.One-shot measurement
In, it can obtain f using wireless interrogation deviceAAnd fBValue, the structural strain size of location for paste can be now drawn according to (5) formula.Survey
After must straining, the resonant frequency changes delta f that antenna is measured caused by strain can be calculated according to (6) formulaBε, then according to (7) formula
Calculate the resonant frequency changes delta f of measurement antenna caused by crackleBcrack。
ΔfBε=ε sBε (6)
ΔfBcrack=fB-f0B-ΔfBε (7)
I.e.
Then, the crack length l below antenna is measuredcrackIt can be drawn according to (8) formula：
When it is shear crack to measure below antenna, it is necessary to observe two resonant frequencies corresponding to its long cross direction.From two
Strain composition is subtracted in resonant frequency change, resonant frequency variable quantity caused by crackle independent role is obtained, then can reflect and split
The length and directional information of line.
Compared to existing technological means, the beneficial effects of the present invention are：There is provided based on binary patch antenna array
Strain and crackle decoupling measurement method, this method realize metal structure strain and crack information using two rectangular patch antennas
Separation, overcome single paster antenna sensor measuring strain and the coupling effect of crackle, ensure that strain with crackle measure
Accuracy.
In another specific embodiment of the present invention：
Treated as shown in figure 1, designed binary patch antenna array is pasted into metal structure surface using super glue
Region is surveyed, wherein compensation antenna, which carries earth plate, only perceives strain information, measurement antenna perceives strain and crackle integrated information.When
When metal structure is in a certain working condition, compensation antenna and measurement antenna are accessed using wireless interrogation device, obtains the two
Resonant frequency fAAnd fB.According to fAAnd fBValue and two paster antennas design sensitivity parameter, you can calculate and obtain the work shape
The crack below strain size and paster under state.
Fig. 2 is the structure and its wireless interrogation schematic device that antenna is compensated in the present invention.The radiation patch of compensation antenna,
Matrix and earth plate three form resonator, and purpose sweep frequency electromagnetic ripple can be transmitted to by wireless interrogation device, according to reflecting
Signal obtain its resonant frequency.Wireless interrogation device is by horn antenna, radio frequency circulator, Network Analyzer and corresponding letter
Number processing module composition.
Fig. 3 is the specific embodiment of the present invention.As illustrated, binary patch antenna array is arranged in steel construction table
Face, the steel construction are acted on by the load of horizontal direction.Antenna is compensated under effects of strain, its length direction resonant frequency drop
It is low；The strained effect of antenna is measured, and there is the crackle perpendicular to length direction lower section, strain and crackle cause its length direction
Resonant frequency reduces.After the completion of sensor arrangement, steel construction normal work, a certain moment measures two using wireless interrogation device
The resonant frequency f of paster antennaAAnd fB, and it is accurate by formula (5)-(8) according to the design parameter of binary patch antenna array
Calculate the crack length below the strain size and paster antenna of location for paste.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (8)
1. a kind of strain based on binary patch antenna array and crackle solution decoupling measuring device, it is characterised in that the device includes
Compensate antenna (1), measurement antenna (2) and wireless interrogation device (3), compensation antenna (1) and measure antenna (2) be two structures with
The rectangular patch antenna that size differs, compensation antenna (1) and measurement antenna (2) are respectively adhered on body structure surface to be measured；
Compensation antenna (1) and measurement antenna (2) are cavity resonator structure, and wireless interrogation device (3) is respectively to compensation antenna (1) and measurement
Antenna (2) launches purpose sweep frequency electromagnetic ripple, and its resonant frequency is obtained respectively according to the signal reflected, and then according to resonant frequency solution
Coupling measurement obtains pasting the crack below the strain size and paster at measurement antenna (2) place.
2. the strain according to claim 1 based on binary patch antenna array and crackle solution decoupling measuring device, its feature
It is, compensation antenna (1) includes radiation patch, matrix and earth plate, and matrix is arranged between radiation patch and earth plate, passed through
Super glue will paste body structure surface to be measured below earth plate.
3. the strain according to claim 2 based on binary patch antenna array and crackle solution decoupling measuring device, its feature
It is, the material of the matrix of compensation antenna (1) is FR4, and the material of radiation patch and earth plate is copper, using printed circuit board (PCB) work
The upper and lower surface that skill deposits copper to FR4 matrix is made.
4. the strain according to claim 1 based on binary patch antenna array and crackle solution decoupling measuring device, its feature
It is, measurement antenna (2) includes radiation patch and matrix, and body structure surface to be measured will be pasted below matrix by super glue.
5. the strain according to claim 4 based on binary patch antenna array and crackle solution decoupling measuring device, its feature
It is, the material of the matrix of measurement antenna (2) is FR4, and the material of radiating antenna is copper, and copper is sunk using printed circuit board technology
Product is made to the upper surface of FR4 matrix.
6. the strain according to claim 1 based on binary patch antenna array and crackle solution decoupling measuring device, its feature
It is, wireless interrogation device (3) includes horn antenna, radio frequency circulator, Network Analyzer and data processing module, for accessing
Compensation antenna and measurement antenna simultaneously obtain the real-time resonant frequencies of the two.
7. a kind of strain using claim 1 based on binary patch antenna array and the measurement side of crackle solution decoupling measuring device
Method, it is characterised in that comprise the following steps：
S1, in body structure surface to be detected, compensation antenna and measurement antenna are respectively adhered on body structure surface to be measured, remembered respectively
Record compensation antenna and the original resonance frequency for measuring antenna；
S2, wireless interrogation device are in real time to compensation antenna and measurement antenna transmitting purpose sweep frequency electromagnetic ripple, according to the signal reflected
Its resonant frequency is obtained respectively；
S3, when crackle occurs for body structure surface to be measured, compensating the earth plate of antenna, to have isolated body structure surface crackle to be measured humorous to its
The influence of vibration frequency, only perceives strain, and measurement antenna perceives strain and crackle integrated information；According to compensation antenna and measurement antenna
Real-time resonant frequencies, with reference to its original resonance frequency, realize that strain and the decoupling of crack information measure.
8. the strain according to claim 7 based on binary patch antenna array and crackle decoupling measurement method, its feature
It is, strain is calculated in step S3 and the method for crack information is：
Obtain compensation antenna and measure the real-time resonant frequencies f of antennaAAnd fBAfterwards, strain size ε is calculated according to below equation：
<mrow>
<mi>&epsiv;</mi>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>f</mi>
<mi>A</mi>
</msub>
<mo>-</mo>
<msub>
<mi>f</mi>
<mrow>
<mn>0</mn>
<mi>A</mi>
</mrow>
</msub>
</mrow>
<msub>
<mi>s</mi>
<mrow>
<mi>A</mi>
<mi>&epsiv;</mi>
</mrow>
</msub>
</mfrac>
</mrow>
Wherein, the original resonance frequency for compensating antenna is f0A, the strain sensitivity for compensating antenna is sAε；
And then isolate resonant frequency change caused by crackle and turn to：
<mrow>
<msub>
<mi>&Delta;f</mi>
<mrow>
<mi>B</mi>
<mi>c</mi>
<mi>r</mi>
<mi>a</mi>
<mi>c</mi>
<mi>k</mi>
</mrow>
</msub>
<mo>=</mo>
<msub>
<mi>f</mi>
<mi>B</mi>
</msub>
<mo>-</mo>
<msub>
<mi>f</mi>
<mrow>
<mn>0</mn>
<mi>B</mi>
</mrow>
</msub>
<mo>-</mo>
<mrow>
<mo>(</mo>
<msub>
<mi>f</mi>
<mi>A</mi>
</msub>
<mo>-</mo>
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<mi>f</mi>
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</msub>
</mfrac>
</mrow>
Wherein, the original resonance frequency for measuring antenna is f0B, the strain sensitivity for measuring antenna is sBε。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710832322.6A CN107747900B (en) | 2017-09-15 | 2017-09-15 | Strain and crack decoupling measurement device and method based on binary patch antenna array |
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|---|---|---|---|
| CN201710832322.6A CN107747900B (en) | 2017-09-15 | 2017-09-15 | Strain and crack decoupling measurement device and method based on binary patch antenna array |
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| CN107747900B CN107747900B (en) | 2020-02-18 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548718A (en) * | 2018-05-18 | 2018-09-18 | 武汉理工大学 | Crack Propagation monitoring system based on microstrip antenna sensor and its monitoring method |
| 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 |
| CN109828020A (en) * | 2019-03-25 | 2019-05-31 | 广东工业大学 | A kind of Metal Crack detection system and method |
| CN110017760A (en) * | 2019-04-15 | 2019-07-16 | 同济大学 | Passive and wireless displacement sensor and displacement sensing system based on helical antenna |
| 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 |
| CN110375686A (en) * | 2019-07-09 | 2019-10-25 | 武汉理工大学 | Wireless flexible micro-strip paster antenna sensor array for metal structure crackle and strain monitoring |
| CN111197956A (en) * | 2020-02-21 | 2020-05-26 | 青岛理工大学 | Strain measurement system and test method |
| CN112254760A (en) * | 2020-09-23 | 2021-01-22 | 武汉理工大学 | Strain crack decoupling measurement sensor based on multilayer microstrip antenna |
| CN115144438A (en) * | 2022-06-30 | 2022-10-04 | 青岛理工大学 | Wireless microstrip patch antenna sensor and application thereof in debonding defect detection field |
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| 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 |
| CN108548718A (en) * | 2018-05-18 | 2018-09-18 | 武汉理工大学 | Crack Propagation monitoring system based on microstrip antenna sensor and its monitoring 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 |
| CN109211978B (en) * | 2018-07-26 | 2020-11-24 | 中国人民解放军陆军装甲兵学院 | Crack 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 |
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| CN109828020A (en) * | 2019-03-25 | 2019-05-31 | 广东工业大学 | A kind of Metal Crack detection system and method |
| CN110017760A (en) * | 2019-04-15 | 2019-07-16 | 同济大学 | Passive and wireless displacement sensor and displacement sensing system based on helical antenna |
| 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 |
| CN110030917B (en) * | 2019-04-15 | 2024-05-14 | 同济大学 | Passive wireless displacement sensor and displacement sensing system adopting circular patch antenna |
| CN110017760B (en) * | 2019-04-15 | 2024-05-10 | 同济大学 | Passive wireless displacement sensor and displacement sensing system based on spiral antenna |
| CN110375686A (en) * | 2019-07-09 | 2019-10-25 | 武汉理工大学 | Wireless flexible micro-strip paster antenna sensor array for metal structure crackle and strain monitoring |
| CN110375686B (en) * | 2019-07-09 | 2021-07-23 | 武汉理工大学 | Wireless flexible microstrip patch antenna sensor array for monitoring cracks and strain of metal structure |
| CN111197956A (en) * | 2020-02-21 | 2020-05-26 | 青岛理工大学 | Strain measurement system and test method |
| CN112254760A (en) * | 2020-09-23 | 2021-01-22 | 武汉理工大学 | Strain crack decoupling measurement sensor based on multilayer microstrip antenna |
| US11726067B1 (en) * | 2022-03-11 | 2023-08-15 | Logistics and Supply Chain MultiTech R&D Centre Limited | Detection system and a method for detecting structural change with a substrate |
| WO2024002040A1 (en) * | 2022-06-30 | 2024-01-04 | 青岛理工大学 | Wireless microstrip patch antenna sensor and application thereof in field of debonding defect detection |
| CN115144438A (en) * | 2022-06-30 | 2022-10-04 | 青岛理工大学 | Wireless microstrip patch antenna sensor and application thereof in debonding defect detection field |
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