CN208722923U - Shear stress sensor based on 0-3 type cement base piezoelectric composite material element - Google Patents
Shear stress sensor based on 0-3 type cement base piezoelectric composite material element Download PDFInfo
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- CN208722923U CN208722923U CN201820951466.3U CN201820951466U CN208722923U CN 208722923 U CN208722923 U CN 208722923U CN 201820951466 U CN201820951466 U CN 201820951466U CN 208722923 U CN208722923 U CN 208722923U
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- composite material
- piezoelectric composite
- cement base
- base piezoelectric
- shear stress
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Abstract
The utility model discloses a kind of shear stress sensor based on 0-3 type cement base piezoelectric composite material element, 0-3 type cement base piezoelectric composite material element used by the shear stress sensor is made of element body and working electrode；For the element body by cement base piezoelectric composite material compression moulding, the polarization direction of element body and the thickness direction of element body are vertical；The working electrode is coated on two apparent surfaces vertical with thickness direction on element body；The cement base piezoelectric composite material mixes acquisition with cement admixture by piezoelectric ceramic particle.The utility model prepares shear stress sensor using 0-3 type cement base piezoelectric composite material element, and prepared shear stress sensor high sensitivity, frequency response is wide, and anti-jamming effectiveness is good, and good with concrete structure compatibility.By the utility model shear stress sensor embedded concrete structure inside or it is pasted on concrete structural surface, can be used to the shear stress for measuring concrete structure.
Description
Technical field
The utility model belongs to cement base piezoelectric composite material technical field, more particularly to a kind of based on 0-3 type cement base
The shear stress sensor of piezo-electricity composite material element.
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 working condition
Under, the measurement of shear stress is most important for concrete structure health monitoring inside concrete structure.Exploitation can be directly embedded into
Inside concrete, the sensor for being directly used in the measurement of inside concrete shear stress, in the strong powers lotus such as earthquake, explosion and impact
The dynamic shear stress of the lower measurement concrete structure of load effect is of great significance.
Utility model content
The purpose of the utility model is to provide a kind of 0-3 type cement bases suitable for shear stress measurement inside concrete structure
Piezo-electricity composite material element and shear stress sensor based on 0-3 type cement base piezoelectric composite material element.
0-3 type cement base piezoelectric composite material element provided by the utility model, is made of element body and working electrode；
The element body is by cement base piezoelectric composite material compression moulding, the polarization direction of element body and the thickness side of element body
To vertical；The working electrode is coated on two apparent surfaces vertical with thickness direction on element body.
Shear stress sensor provided by the utility model based on 0-3 type cement base piezoelectric composite material element, including it is upper
State the envelope successively coated outside 0-3 type cement base piezoelectric composite material element and 0-3 type cement base piezoelectric composite material element
Fill layer, shielded layer；The anode and cathode of the 0-3 type cement base piezoelectric composite material element pass through conducting wire and lead to shielded layer
It is connected outside and with shielding line, the shielding line is also connected with shielded layer.
The conducting wire is preferably copper conductor.
The shielding line preferably shields copper core cable.
Compared to the prior art, the utility model is had the following advantages and beneficial effects:
(1) the utility model prepares shear stress sensing using the 0-3 type cement base piezoelectric composite material element of designed, designed
Device, prepared shear stress sensor high sensitivity, frequency response are wide, anti-jamming effectiveness is good, and good with concrete structure compatibility.
By the utility model shear stress sensor embedded concrete structure inside or it can be pasted on concrete structural surface, it is mixed for measuring
The shear stress of Xtah Crude Clay structure has important meaning to application of the cement base piezoelectric composite material in concrete structure health monitoring
Justice.
(2) the utility model shear stress sensor can preferably reduce noise using copper conductor and shielding copper core cable
It influences.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of 0-3 type cement base piezoelectric composite material element in embodiment；
Fig. 2 is the preparation process flow of 0-3 type cement base piezoelectric composite material element in embodiment；
Fig. 3 is the perspective structure schematic diagram of shear stress sensor in embodiment；
Fig. 4 is the schematic cross-sectional view of shear stress sensor in embodiment；
Fig. 5 is the preparation process flow of shear stress sensor in embodiment.
In figure: 1- working electrode, 2- element body, 3- shielded layer, 4- encapsulated layer, 5-0-3 type cement base piezoelectric composite wood
Expect element, 6- conducting wire, 7- shielding line.
Specific embodiment
In order to illustrate more clearly of the utility model and/or technical solution in the prior art, control attached drawing is said below
Bright specific embodiment of the present utility model.It should be evident that the accompanying drawings in the following description is only some of the utility model
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings, and obtains other embodiments.
The utility model shear stress sensor is made based on 0-3 type cement base piezoelectric composite material element, as shown in Figure 1,
The 0-3 type cement base piezoelectric composite material element is made of element body 2 and working electrode 1, in the vertical thickness of element body 2
The upper coating work electrode 1 of two apparent surfaces for spending direction.Wherein, element body 2 is by cement base piezoelectric composite material compression moulding,
Cement base piezoelectric composite material is a kind of composite material being mixed to get by piezoelectric ceramic particle and cement admixture.To element master
Before body 2 polarizes, polarizing electrode need to be coated to element body 2.The pole of the utility model 0-3 type cement base piezoelectric composite material element
Change the thickness direction that perpendicular elements main body 2 is answered in direction, i.e., should polarize to element body 2 in the direction X2 or X3 along Fig. 1.Institute
With polarizing electrode should be coated on the two relative side of element body 2.Here, the thickness direction of the direction X1 finger element main body 2, X2
The length or width direction of direction finger element main body 2, the width or length direction of the direction X3 finger element main body 2.
In present embodiment, the preparation process of 0-3 type cement base piezoelectric composite material element is referring to fig. 2, specific to walk
It is rapid as follows:
(101) flyash is uniform with cement mixing, obtain cement admixture matrix.Aluminium sulfate water can be used in cement
Mud, barium-bearing calcium sulfo-aluminate cement, portland cement, chloric acid salt cement, fluorine chloric acid salt cement etc.；Flyash can be used I grade of flyash,
II grade of flyash, III grade of flyash etc..Using the cement admixture matrix of the proportion, cement base piezoelectric composite wood can be obviously improved
The compactness of material, to obtain better stability.
(102) piezoelectric ceramic particle is uniformly mixed with cement admixture matrix, obtains cement base piezoelectric composite material.Pressure
Lead titanate piezoelectric ceramics, magnesium niobium lead zirconate titanate piezoelectric ceramics, niobium lithium lead titanate piezoelectric ceramics etc. can be used in electroceramics particle.
(103) cement base piezoelectric composite material is watered and is stirred evenly, pour into compression moulding in the mold of tablet press machine and supported
Shield.It is watered the bubble of mixture in stirring for elimination, improves the compactness of composite material, after carrying out adequately being watered stirring,
The mixture for being watered stirring is first put into vibration vaccum-pumping equipment before compression moulding, carries out vibration vacuumize process.
(104) polishing rubbing down is carried out to the green body after the completion of maintenance, obtains element body.In present embodiment, most
The element body of the cuboid-type of long 10mm, width 10mm, thickness 5mm is obtained eventually.
(105) polarizing electrode is made on two sides X1-X2 parallel with thickness direction on element body.This is specific real
It applies in mode, polarizing electrode is made of low-temperature conductive silver paste.
(106) element body for having made polarizing electrode is put into silicone oil, applies polarizing voltage between two polarizing electrodes,
It polarizes to element body.
(107) after the completion of polarizing, depolarizing electrode is removed.
(108) working electrode 2 is made on two apparent surfaces vertical with thickness direction on element body, i.e. two in Fig. 1
A surface X2-X3, to obtain 0-3 type cement base piezoelectric composite material element.0-3 type prepared by present embodiment
In cement base piezoelectric composite material element, the volume accounting of piezoelectric ceramic particle is 66.7%.
Fig. 3~4 are that the specific structure of the shear stress sensor based on 0-3 type cement base piezoelectric composite material element is illustrated
Figure, which includes 0-3 type cement base piezoelectric composite material element 5 and 0-3 type cement base piezoelectric composite material
Encapsulated layer 4, the shielded layer 3 successively coated outside element 5；The anode and cathode of 0-3 type cement base piezoelectric composite material element 5 are logical
It crosses conducting wire 6 to lead to outside shielded layer 3 and be connected with shielding line 7, the shielding line 7 also connects shielded layer 3 by another conducting wire.
In present embodiment, encapsulated layer is used to protect and encapsulate the 0-3 type cement base piezoelectric composite material element,
Epoxy resin encapsulating material specifically can be used.Shielded layer uses the shielding material of maskable electromagnetism, and cement base screen specifically can be used
Cover material.The conducting wire uses copper conductor, and the shielding line is using shielding copper core.
See Fig. 5, in present embodiment, based on the shear stress sensor of 0-3 type cement base piezoelectric composite material element,
Specific step is as follows by its preparation process:
(201) anode and cathode of 0-3 type cement base piezoelectric composite material element are drawn by conducting wire, it is positive and negative
Pole, that is, 0-3 type cement base piezoelectric composite material element working electrode.
(202) 0-3 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 0-3 type cement base piezoelectric composite material element is put into mold and sets
In bottom package material, 0-3 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 made outside using the 0-3 type cement base piezoelectric composite material element of shielding material after packaging, from
And obtain shear stress sensor.
The shielded layer production, 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.
(204) conducting wire connecting with the positive and negative anodes of the 0-3 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.
Be described in above-described embodiment to illustrate the utility model, though text in be illustrated by specific term,
But protection scope of this utility model cannot be limited by this, and the personage for being familiar with this technical field can be in the essence for understanding the utility model
It is changed or is modified and reaches equivalent purpose after mind and principle, and this equivalent change and modification, it should all be covered by right
In the defined scope of claimed range.
Claims (2)
1. a kind of shear stress sensor based on 0-3 type cement base piezoelectric composite material element, it is characterized in that:
Including successively being coated outside 0-3 type cement base piezoelectric composite material element and 0-3 type cement base piezoelectric composite material element
Encapsulated layer, shielded layer；
The 0-3 type cement base piezoelectric composite material element is made of element body and working electrode；The element body is by water
Mud base piezoelectric composite material compression moulding, the polarization direction of element body and the thickness direction of element body are vertical；The work
Electrode is coated on two apparent surfaces vertical with thickness direction on element body；
The 0-3 type cement base piezoelectric composite material element anode and cathode pass through conducting wire lead to shielded layer outside and with screen
It covers line to be connected, the shielding line is also connected with shielded layer.
2. the shear stress sensor as described in claim 1 based on 0-3 type cement base piezoelectric composite material element, feature
It is:
The conducting wire is copper conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820951466.3U CN208722923U (en) | 2018-06-20 | 2018-06-20 | Shear stress sensor based on 0-3 type cement base piezoelectric composite material element |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820951466.3U CN208722923U (en) | 2018-06-20 | 2018-06-20 | Shear stress sensor based on 0-3 type cement base piezoelectric composite material element |
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| Publication Number | Publication Date |
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| CN208722923U true CN208722923U (en) | 2019-04-09 |
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| CN201820951466.3U Expired - Fee Related CN208722923U (en) | 2018-06-20 | 2018-06-20 | Shear stress sensor based on 0-3 type cement base piezoelectric composite material element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117347436A (en) * | 2023-10-24 | 2024-01-05 | 湖南科技大学 | CNS cement-based piezoelectric polarization sensor and method of use thereof |
-
2018
- 2018-06-20 CN CN201820951466.3U patent/CN208722923U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117347436A (en) * | 2023-10-24 | 2024-01-05 | 湖南科技大学 | CNS cement-based piezoelectric polarization sensor and method of use thereof |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190409 Termination date: 20200620 |
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| CF01 | Termination of patent right due to non-payment of annual fee |