CN206321199U - A kind of repeated strain sensor based on microstrip antenna - Google Patents
A kind of repeated strain sensor based on microstrip antenna Download PDFInfo
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- CN206321199U CN206321199U CN201621359027.0U CN201621359027U CN206321199U CN 206321199 U CN206321199 U CN 206321199U CN 201621359027 U CN201621359027 U CN 201621359027U CN 206321199 U CN206321199 U CN 206321199U
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- web
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- wing plate
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Abstract
The utility model discloses a kind of repeated strain sensor based on microstrip antenna, including conductor patch, dielectric substrate, the conductor patch is installed on dielectric substrate, it is characterised in that：The conductor patch includes web and is installed in the wing plate of web both sides, and the width of the wing plate is more than the width of web.The utility model is by changing the shape of conductor patch, width i.e. by the way that the width of wing plate to be more than to web, it can realize that the strain result to detection is amplified, and different degrees of amplification can be carried out the ess-strain output result of sensor by the length for changing web, the working frequency under the conditions of certain overall dimension of sensor is set to diminish, or compared with rectangular patch, there is smaller size under same working frequency.Therefore, its Detection results more preferably, while can also be so as to reducing the requirement to measuring instrument.
Description
Technical field
The utility model is related to a kind of strain transducer, more particularly to a kind of repeated strain sensing based on microstrip antenna
Device.
Background technology
Usage amount of the metal structure in the fields such as modern plant equipment and civil engineering is extremely huge.Band large-scale metal knot
Structure works or in rugged environment throughout the year, and bears heavy duty and fatigue load for a long time, it is difficult to can produce one with avoiding
Determine the strain of degree.When strain increases to the elastic range of material, structure can be made to produce irreversible deformation, steel knot is caused
Bearing capacity and the anti-fatigue performance reduction of structure, are that the safety continuous operation of equipment brings hidden danger, or even lead to extremely serious
Consequence.Accordingly, it would be desirable to which certain technological means is monitored in real time to the strain at structural key position in advance, and take corresponding
Precautionary measures.Existing strain measurement technique mainly has fiber grating, deformeter, piezoelectric ceramics etc., and fiber grating is easily damaged,
And costly；Piezoelectric element fragility is big, is difficult to be embedded to structure.
Existing wired sensor cable arrangement is cumbersome at present, when being used on moving component or rotating mechanism, has
The use of line sensor will be very restricted；Although common wireless senser can avoid cable Layout Problem,
Need to use integrated circuit and power supply, complete the reception of signal, transmission and even handle, this will give the use ring of sensor
Very big limitation is brought in border, service life.
With the development of structural health monitoring technology, the performance and structure type of sensor are also more and more important, passive, nothing
Line, small volume, it is simple in construction the features such as be increasingly becoming the development trend of sensor.These advantages can to sensor installation,
Array, which is arranged and safeguarded, brings very big facility.
Utility model content
Technical problem to be solved in the utility model is a kind of inspection of not enough offer existed for above-mentioned prior art
Survey effect good, it is possible to so as to reduce the repeated strain sensor based on microstrip antenna of the requirement to measuring instrument.
The technical scheme that the utility model is used for：A kind of repeated strain sensor based on microstrip antenna, including lead
Piece, dielectric substrate are shown consideration for, the conductor patch is installed on dielectric substrate, it is characterised in that：The conductor patch includes web
With the wing plate for being installed in web both sides, the width of the wing plate is more than the width of web.
By above-mentioned technical proposal, also including metal ground plate, the dielectric substrate is connected with metal ground plate.
By above-mentioned technical proposal, the wing plate is symmetricly set on the both sides of web.
By above-mentioned technical proposal, the curved surface smoothly transitted is symmetrical arranged into close to the bottom of web in two outsides of wing plate
Shape.
By above-mentioned technical proposal, the length of the wing plate is 5-20mm, and width is 8-12mm.
Having the beneficial effect that acquired by the utility model：The utility model is passed through by changing the shape of conductor patch
The width of wing plate is more than to the width of web, it is possible to achieve the strain result to detection is amplified, and by changing web
Length can carry out the ess-strain output result of sensor different degrees of amplification, make sensor in certain overall chi
Working frequency diminishes under the conditions of very little, or with smaller working frequency under same working frequency.Therefore, its Detection results
More preferably, while can also be so as to reducing the requirement to measuring instrument.
Brief description of the drawings
Fig. 1 is structure chart of the present utility model.
Fig. 2 is the structural representation of conductor patch in the utility model.
Fig. 3 is S11 (strain sensitivity) simulation curve figure of instantiation in the present embodiment.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, 2, a kind of repeated strain sensor based on microstrip antenna, including conductor patch are present embodiments provided
Piece 1, dielectric substrate 2, conductor patch 1 pass through burn into photoetching, seccotine using relatively good materials of electric conductivity such as copper, silver, gold
The mode that water is pasted is covered in a surface of dielectric substrate 2.Described dielectric substrate 2 uses the insulation material of known dielectric constant
Material (its thickness will be much smaller than the operation wavelength of sensor), including：Polyimides, polytetrafluoroethylene (PTFE), epoxy resin etc..It is described to lead
Showing consideration for piece 1 includes web 5 and is installed in the wing plate 4 of web both sides, and the width of the wing plate 4 is more than the width of web 5, the wing
Plate 4 is symmetricly set on the both sides of web.
When measurand is metal, repeated strain sensor of the present utility model can be not provided with metal ground plate
Layer, when measurand is nonmetallic, repeated strain sensor of the present utility model also includes metal ground plate 3, the metal
Earth plate 3 is one kind in aluminium sheet, steel plate, copper coin.
In the present embodiment, the curved smoothly transitted is symmetrical arranged into close to the bottom of web in two outsides of wing plate 4
6, the radiation field between paster edge and earth plate had both been added, also ensure that patch edges had more preferable sticking effect.Wherein,
It is preferred that, the length of the wing plate is：5-20mm, width is 8-12mm.
The reference center frequency of the sensor is with the relation of sensor relevant parameter as shown in following equation：
In formula, fresRepresent resonant frequency (f01And f10TM is represented respectively01And TM10Resonant frequency under mode of operation, its
In, TM01 and TM10 represent working sensor in (0,1) mould and (1,0) mould respectively；(0,1) mould and (1,0) mould represent sensing
Two kinds of blocks of device)；εreFor effective dielectric constant；C is the light velocity；LeAnd weRespectively current length and electric current width is (in ideal
Geometrical length, width in the case of free from flaw respectively with paster is identical, when taking L and W respectively, corresponding to f01And f10)；ΔLOC
For line development length；L and W are respectively the geometrical length and geometric widths of conductor patch；εrFor the dielectric constant of dielectric substrate；h
For the thickness of dielectric substrate.ΔwocFor line extension width.
Described computing formula is the special formula that rectangular conductor patch resonant frequency is calculated, can only for conductor patch 1
Certain reference role is played, the approximate range for determining working sensor frequency.Its principle is：When conductor patch is rectangle
When, the current length L on its surfaceeEqual to the geometrical length L of paster, when conductor patch is improved into paster 1, electric current can be along patch
The surface of piece 1 is flowed, and the electric current of patch edges can be flowed along paster profile (contour edge of wing plate and web),
Cause the current length L of length directioneL is will be greater than, according to sensor resonant frequency computing formula, LeIncrease, fresIt can reduce.
The utility model changes the shape of conductor patch, with reference to the design concept of above-mentioned fatigue testing specimen, can be to structure
The strain output valve amplification of generation, and may be mounted at its peripheral region during inconvenient install sensor at structural stress concentration
Domain, can equally reach strain monitoring effect.In current microstrip antenna strain transducer, when patch size design it is smaller
When, the resonant frequency of sensor can add instrument than larger, swept frequency range and performance requirement increase to vector network analyzer
The use cost of device.The design is improved also in relation with the Miniaturization Design and meander technology of antenna to antenna patch simultaneously,
Make it compared with overall dimension identical rectangular patch, with smaller resonant frequency, so as to reduce the requirement to measuring instrument.
This sensor has the advantages that passive, wireless, simple in construction, small volume, thin profile, can form conformal with body structure surface, also
The a wide range of monitoring to structural strain can be realized by the array arrangement of sensor.
Instantiation：
The material selection polyethylene (polyethylene) of dielectric substrate 2, chi in New Microstrip Antenna described in the present embodiment
Very little (length × width x thickness) is 100mm × 50mm × 0.3mm, and dielectric constant is 2.25；The material of conductor patch 1 is copper, and size is (long
× width x thickness) it is 40mm × 30mm × 0.05mm, L is 40mm, and W is 30mm, L0For 20mm, the width of middle pectoral plate is 10mm,
First order wing plate width is 30mm, and second level wing plate width (narrowing end) is 20mm；The material of metal ground plate 3 selects aluminium, size
(length × width x thickness) is 100mm × 100mm × 4mm.Metal ground plate 3, dielectric substrate 2, conductor patch 1 all pass through super glue
It is bonded, and the thickness variable of trying one's best of tack coat should be made thin.By to sensor send microwave frequency modulation signal and receive from
The backscatter signal that sensor is reflected, extracts the resonant frequency of sensor, and and initial value from backscatter signal
Contrasted, obtained the size of strain.
As shown in figure 3, be the sensor without the S11 curve maps under straining and having 1% strained condition, the sensor should
Sensibility variable is 1.2KHz/ μ ε.
Claims (5)
1. a kind of repeated strain sensor based on microstrip antenna, including conductor patch, dielectric substrate, the conductor patch are installed
On dielectric substrate, it is characterised in that：The conductor patch includes web and is installed in the wing plate of web both sides, the wing plate
Width is more than the width of web.
2. sensor according to claim 1, it is characterised in that：Also include metal ground plate, the dielectric substrate and gold
Belong to earth plate to be connected.
3. sensor according to claim 1 or 2, it is characterised in that：The wing plate is symmetricly set on the both sides of web.
4. sensor according to claim 1 or 2, it is characterised in that：In two outsides of wing plate close to the bottom of web
It is symmetrical arranged into the curved smoothly transitted.
5. sensor according to claim 1 or 2, it is characterised in that：The length of the wing plate is 5-20mm, and width is 8-
12mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621359027.0U CN206321199U (en) | 2016-12-12 | 2016-12-12 | A kind of repeated strain sensor based on microstrip antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621359027.0U CN206321199U (en) | 2016-12-12 | 2016-12-12 | A kind of repeated strain sensor based on microstrip antenna |
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| Publication Number | Publication Date |
|---|---|
| CN206321199U true CN206321199U (en) | 2017-07-11 |
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| CN201621359027.0U Expired - Fee Related CN206321199U (en) | 2016-12-12 | 2016-12-12 | A kind of repeated strain sensor based on microstrip antenna |
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Cited By (5)
| 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 |
| 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 |
| CN111226088A (en) * | 2017-11-30 | 2020-06-02 | 沙特阿拉伯石油公司 | Flexible strip antenna array for tank volume calibration and resonant frequency shift measurement method using the same |
| CN111257380A (en) * | 2020-01-16 | 2020-06-09 | 武汉理工大学 | Passive wireless temperature crack binary sensor array based on microstrip antenna |
-
2016
- 2016-12-12 CN CN201621359027.0U patent/CN206321199U/en not_active Expired - Fee Related
Cited By (6)
| 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 |
| CN111226088A (en) * | 2017-11-30 | 2020-06-02 | 沙特阿拉伯石油公司 | Flexible strip antenna array for tank volume calibration and resonant frequency shift measurement method using the same |
| 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 |
| CN111257380A (en) * | 2020-01-16 | 2020-06-09 | 武汉理工大学 | Passive wireless temperature crack binary sensor array based on microstrip antenna |
| CN111197956A (en) * | 2020-02-21 | 2020-05-26 | 青岛理工大学 | Strain measurement system and test method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170711 Termination date: 20171212 |
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| CF01 | Termination of patent right due to non-payment of annual fee |