CN208225914U - Shear stress sensor based on 2-2 type cement base piezoelectric composite material - Google Patents
Shear stress sensor based on 2-2 type cement base piezoelectric composite material Download PDFInfo
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- CN208225914U CN208225914U CN201721217193.1U CN201721217193U CN208225914U CN 208225914 U CN208225914 U CN 208225914U CN 201721217193 U CN201721217193 U CN 201721217193U CN 208225914 U CN208225914 U CN 208225914U
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- composite material
- cement base
- piezoelectric composite
- base piezoelectric
- type cement
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- 239000004568 cement Substances 0.000 title claims abstract description 70
- 239000002131 composite material Substances 0.000 title claims abstract description 57
- 239000000919 ceramic Substances 0.000 claims abstract description 46
- 239000011159 matrix material Substances 0.000 claims abstract description 13
- 230000010287 polarization Effects 0.000 claims abstract description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 230000036541 health Effects 0.000 abstract description 4
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 238000003491 array Methods 0.000 abstract description 2
- 230000004044 response Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 10
- 238000005266 casting Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 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 description 3
- 238000005538 encapsulation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- UOVYDOCVEQSJNR-UHFFFAOYSA-N [Pb].[Li].[Nb] Chemical compound [Pb].[Li].[Nb] UOVYDOCVEQSJNR-UHFFFAOYSA-N 0.000 description 1
- FOLMBQLGENFKLO-UHFFFAOYSA-N [Pb].[Mg].[Nb] Chemical compound [Pb].[Mg].[Nb] FOLMBQLGENFKLO-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model discloses a kind of shear stress sensors based on 2-2 type cement base piezoelectric composite material, the shear stress sensor includes encapsulated layer, the shielded layer successively coated outside 2-2 type cement base piezoelectric composite material element and 2-2 type cement base piezoelectric composite material element；2-2 type cement base piezoelectric composite material element anode and cathode pass through conducting wire lead to shielded layer outside be connected with shielding line, shielding line is also connected with shielded layer.The element includes cement base piezoelectric composite material main body and electrode, and cement base piezoelectric composite material main body is made of piezoelectric ceramic piece and cement matrix piece alternating close-packed arrays, and outermost layer is piezoelectric ceramic piece；Piezoelectric ceramic piece is by obtaining to the piezoelectric ceramics block cutting after polarization, and cut direction is vertical with the polarization direction of piezoelectric ceramics block.The utility model transducer sensitivity is high, frequency response is wide, anti-jamming effectiveness is good, good with concrete structure compatibility, can be applied to concrete structure health monitoring.
Description
Technical field
The utility model belongs to cement base piezoelectric composite material technical field, more particularly to a kind of based on 2-2 type cement base
The shear stress sensor of piezo-electricity composite material.
Background technique
Cement base piezoelectric composite material has been developed in recent years a kind of new function material, good with piezoelectric property,
Mechanical-electric coupling performance is prominent, with concrete material mechanics, acoustical behavior matching is good the features such as, in the health of civil engineering structure
There is potential application prospect in monitoring.
It is incompatible with concrete structure that the cement base piezoelectric composite material sensor developed at present overcomes traditional sensors
The problem of, high sensitivity and durability is good, the monitoring for situations such as can be used for the strain of concrete structure internal stress.But it there is no at present
The effective means of shear stress (i.e. shearing wave) directly inside measurement concrete structure.The shearing strength of concrete material is low, by
Failure by shear easily occurs under power state, and the failure by shear of concrete is a typical brittle break.So under working condition
The measurement of shear stress is most important for concrete structure inside concrete structure.Exploitation can be directly embedded into inside concrete,
It is directly used in the sensor of inside concrete shear stress measurement, especially in the strong powers load action such as earthquake, explosion and impact
Under the measurement of dynamic shear stress have great importance.
Utility model content
The main purpose of the utility model be to provide it is a kind of suitable for inside concrete structure shear stress measurement based on 2-2
The shear stress sensor of type cement base piezoelectric composite material.
A kind of 2-2 type cement base piezoelectric composite material element provided by the utility model, including cement base piezoelectric composite wood
Expect main body and electrode, the cement base piezoelectric composite material main body replaces close-packed arrays structure by piezoelectric ceramic piece and cement matrix piece
At the outermost layer of the cement base piezoelectric composite material main body is piezoelectric ceramic piece；The piezoelectric ceramic piece is by polarization
Piezoelectric ceramics block afterwards, which is cut, to be obtained, and cut direction is vertical with the polarization direction of piezoelectric ceramics block.
Further, in the cement base piezoelectric composite material main body, volume ratio shared by piezoelectric ceramics column be 20%~
80%.
A kind of shear stress sensor based on 2-2 type cement base piezoelectric composite material provided by the utility model, including 2-2
The encapsulation successively coated outside type cement base piezoelectric composite material element and the 2-2 type cement base piezoelectric composite material element
Layer, shielded layer；The anode and cathode of the 2-2 type cement base piezoelectric composite material element pass through conducting wire and lead to outside shielded layer
It is connected with shielding line, the shielding line is also connected with shielded layer.
Further, the 2-2 type cement base piezoelectric composite material element include cement base piezoelectric composite material main body and
Electrode, by piezoelectric ceramic piece and cement matrix piece, alternately superposition is constituted the cement base piezoelectric composite material main body, the cement
The outermost layer of base piezoelectric composite material main body is piezoelectric ceramic piece；The piezoelectric ceramic piece is by the piezoelectric ceramics after polarization
Block cutting obtains, and cut direction is vertical with the polarization direction of piezoelectric ceramics block.
Compared to the prior art, the utility model is had the following advantages and beneficial effects:
The utility model transducer sensitivity is high, frequency response is wide, anti-jamming effectiveness is good, and with concrete structure compatibility
It is good.By the utility model sensor embedded concrete structure inside or it can be pasted on concrete structural surface, measure concrete knot
The shear stress of structure is of great significance to application of the cement base piezoelectric composite material in concrete structure health monitoring.
Detailed description of the invention
Fig. 1 is the specific preparation process schematic diagram of 2-2 type cement base piezoelectric composite material element；
Fig. 2 is the specific structural schematic diagram of shear stress sensor based on 2-2 type cement base piezoelectric composite material；
Fig. 3 is the cross-sectional view of shear stress sensor in Fig. 2；
Fig. 4 is the specific preparation process schematic diagram of shear stress sensor based on 2-2 type cement base piezoelectric composite material.
In figure: 1- piezoelectric ceramics block, 2- polarizing electrode, 3- pedestal, 4- piezoelectric ceramic piece, 5- cement matrix piece, 6- green body,
The new electrode of 7-, 8- conducting wire, 9- cement base piezoelectric composite material element, 10- encapsulated layer, 11- shielded layer, 12- shielding line, a are indicated
Remove polarizing electrode step, b indicates cutting piezoelectric ceramic piece step, and c indicates that cement matrix is poured step, and d indicates cutting base
With rubbing down step, e indicates that production electrode step, f indicate connecting wire step.
Specific embodiment
It, below will control in order to illustrate more clearly of the utility model embodiment and/or technical solution in the prior art
Detailed description of the invention specific embodiment of the present utility model.It should be evident that the accompanying drawings in the following description is only the utility model
Embodiment for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings, and obtains other embodiments.
Fig. 1 is seen, in present embodiment, using cutting-casting preparation 2-2 type cement base piezoelectric composite material member
Part, main raw material(s) include piezoelectric ceramics block and cement matrix, the specific process is as follows:
(101) polarizing electrode 2 of the piezoelectric ceramics block 1 after removing polarization, piezoelectric ceramics block 1 is placed on pedestal 3.It is described
Piezoelectric ceramics block can be lead titanate piezoelectric ceramics, magnesium niobium lead zirconate titanate piezoelectric ceramics, niobium lithium lead titanate piezoelectric ceramics etc..
(102) cutting machine is utilized, piezoelectric ceramics block 1 is cut into several equidistant piezoelectric ceramic pieces 4；Cut direction with
The polarization direction of piezoelectric ceramics block 1 is vertical.
In the present embodiment, the size of piezoelectric ceramics block 1 is 8mm × 8mm × 8mm, the piezoelectric ceramic piece 4 cut having a size of
8mm×7mm×2mm。
(103) piezoelectric ceramic piece 4 is connected pedestal 3 to be placed in mold, cement matrix is cast in mold, casting complete
Afterwards, it is put into curing box maintenance.
Preferably, before implementing this step, supersonic wave cleaning machine can be used, ultrasound is carried out clearly to piezoelectric ceramic piece
It washes, removes remaining ceramic residues, to avoid the performance for influencing cement base piezoelectric composite material element.And then after drying
Piezoelectric ceramic piece merging mold in.
To eliminate the bubble in cement matrix, the compactness of cement matrix is improved, the cement matrix of preparation is carried out abundant
After stirring, it is put into vacuum equipment and carries out vacuumize process；Meanwhile being poured using vibrating casting method is vacuumized, that is, casting
While vacuumize and swing die.
(104) after the completion of conserving, green body 6 is taken out, which is then alternately arranged by piezoelectric ceramic piece 4 and cement matrix piece 5
It constitutes；The pedestal 3 of green body 6 is cut away, and rubbing down is carried out to green body 6, until the upper and lower surface of green body 6 is completely exposed piezoelectric ceramics
Piece 4.In the present embodiment, the piezoelectric ceramic piece 4 finally obtained is having a size of 8mm × 6mm × 2mm.
(105) new electrode 7 is made in the upper and lower surface that green body 6 is completely exposed piezoelectric ceramics column 4, obtains 2-2 type cement base
Piezo-electricity composite material element, in prepared 2-2 type cement base piezoelectric composite material element, volume ratio shared by piezoelectric ceramic piece 4
It is 20%~80%, remaining as cement matrix.In the present embodiment, new electrode 7 uses low-temperature conductive silver medal.
Fig. 2~3 are the shear stress sensor prepared using the utility model 2-2 type cement base piezoelectric composite material element,
Including cement base piezoelectric composite material element 9, encapsulated layer 10 and shielded layer 11, outside the cement base piezoelectric composite material element 9
Encapsulated layer 10, shielded layer 11 are successively coated, the anode and cathode of the cement base piezoelectric composite material element 9 pass through conducting wire 8
Shielding line 12 is led to outside shielded layer 11 and is all connected with, shielding line 12 also passes through conducting wire and connects shielded layer 11.The encapsulated layer is used
To protect and encapsulate the cement base piezoelectric composite material element；The shielded layer is used to make shear stress sensor and concrete knot
Structure has preferable coupling effect, and can make shear stress sensor preferably shielding noise.
See Fig. 4, in present embodiment, the tool of the shear stress sensor based on 2-2 type cement base piezoelectric composite material
Body technology is as follows:
(201) by above-mentioned steps (101)~(105) preparation 2-2 type cement base piezoelectric composite material element anode and
Cathode is drawn by conducting wire.
(202) 2-2 type cement base piezoelectric composite material element is packaged using encapsulating material, and solidified.
The encapsulation, a kind of specific embodiment are as follows:
Mold bottom is poured the encapsulating material stirred evenly, and 2-2 type cement base piezoelectric composite material element is put into mold and sets
In bottom package material, 2-2 type cement base piezoelectric composite material element is poured later；Sample after casting complete is put
Enter vacuum equipment and carry out vacuumize process, to eliminate the gas in encapsulating material；It is supported finally, sample is put into standard curing box
Shield.
(203) shielded layer is prepared outside using the 2-2 type cement base piezoelectric composite material element of shielding material after packaging, from
And obtain shear stress sensor.
The shielded layer preparation, a kind of specific embodiment are as follows:
The sample that maintenance is completed is put into mold, is poured using shielding material；Sample after casting complete is placed again into vacuum
Equipment carries out vacuumize process, to eliminate the gas in shielding material；It is conserved finally, sample is put into standard curing box.
(205) conducting wire connecting with the positive and negative anodes of the 2-2 type cement base piezoelectric composite material element is connected into shielding line,
In addition, shielding line also passes through another conducting wire connection shielded layer.
Shear stress sensor prepared by the utility model, can be used for measuring concrete structural surface or cutting for inside is answered
Power, specifically: shear stress sensor is pasted on concrete structural surface or is placed in inside concrete structure, thus to concrete
Structure carries out health monitoring.
Claims (2)
1. the shear stress sensor based on 2-2 type cement base piezoelectric composite material, characterized in that include:
It is successively coated outside 2-2 type cement base piezoelectric composite material element and the 2-2 type cement base piezoelectric composite material element
Encapsulated layer, shielded layer；The anode and cathode of the 2-2 type cement base piezoelectric composite material element pass through conducting wire and lead to screen
It covers and is connected outside layer with shielding line, the shielding line is also connected with shielded layer；
The 2-2 type cement base piezoelectric composite material element includes cement base piezoelectric composite material main body and electrode, the cement
By piezoelectric ceramic piece and cement matrix piece, alternately superposition is constituted base piezoelectric composite material main body, the cement base piezoelectric composite material
The outermost layer of main body is piezoelectric ceramic piece；The piezoelectric ceramic piece is cut by obtaining to the piezoelectric ceramics block cutting after polarization
It is vertical with the polarization direction of piezoelectric ceramics block to cut direction.
2. the shear stress sensor as described in claim 1 based on 2-2 type cement base piezoelectric composite material, it is characterized in that:
In the cement base piezoelectric composite material main body, volume ratio shared by piezoelectric ceramic piece is 20%~80%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721217193.1U CN208225914U (en) | 2017-09-21 | 2017-09-21 | Shear stress sensor based on 2-2 type cement base piezoelectric composite material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721217193.1U CN208225914U (en) | 2017-09-21 | 2017-09-21 | Shear stress sensor based on 2-2 type cement base piezoelectric composite material |
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| Publication Number | Publication Date |
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| CN208225914U true CN208225914U (en) | 2018-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721217193.1U Expired - Fee Related CN208225914U (en) | 2017-09-21 | 2017-09-21 | Shear stress sensor based on 2-2 type cement base piezoelectric composite material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991006A (en) * | 2018-01-17 | 2018-05-04 | 华侨大学 | Apply the piezoelectric ceramics dynamic tension sensor and its scaling method of pretightning force |
| CN109357795A (en) * | 2018-12-28 | 2019-02-19 | 吉林建筑大学 | A kind of cement base piezoelectric composite material sensor |
-
2017
- 2017-09-21 CN CN201721217193.1U patent/CN208225914U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991006A (en) * | 2018-01-17 | 2018-05-04 | 华侨大学 | Apply the piezoelectric ceramics dynamic tension sensor and its scaling method of pretightning force |
| CN107991006B (en) * | 2018-01-17 | 2024-02-13 | 华侨大学 | Piezoelectric ceramic dynamic tension stress sensor applying pretightening force and calibration method thereof |
| CN109357795A (en) * | 2018-12-28 | 2019-02-19 | 吉林建筑大学 | A kind of cement base piezoelectric composite material sensor |
| CN109357795B (en) * | 2018-12-28 | 2023-09-01 | 吉林建筑大学 | Cement-based piezoelectric composite material sensor |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181211 Termination date: 20190921 |