CN109357795A - A kind of cement base piezoelectric composite material sensor - Google Patents
A kind of cement base piezoelectric composite material sensor Download PDFInfo
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- CN109357795A CN109357795A CN201811622860.3A CN201811622860A CN109357795A CN 109357795 A CN109357795 A CN 109357795A CN 201811622860 A CN201811622860 A CN 201811622860A CN 109357795 A CN109357795 A CN 109357795A
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- 239000002131 composite material Substances 0.000 title claims abstract description 65
- 239000004568 cement Substances 0.000 title claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 113
- 239000011159 matrix material Substances 0.000 claims abstract description 15
- 238000012856 packing Methods 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 9
- 238000005253 cladding Methods 0.000 claims abstract description 8
- 238000009413 insulation Methods 0.000 claims description 14
- 238000009826 distribution Methods 0.000 claims description 11
- 230000002708 enhancing effect Effects 0.000 claims description 11
- 230000007935 neutral effect Effects 0.000 claims description 9
- 230000008021 deposition Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 239000004567 concrete Substances 0.000 abstract description 17
- 238000005259 measurement Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000001965 increasing effect Effects 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 50
- 238000005516 engineering process Methods 0.000 description 5
- 239000002520 smart material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000000919 ceramic Substances 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
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present invention relates to a kind of cement base piezoelectric composite material sensors, it include: cementitious matrix material, piezoelectricity packing material, fiber-filled material and conductive filling material, feature is that entire entity structure is divided into sensor base, first electrode layer, piezoelectric material composite layer and the second electrode lay, wherein: the sensor base is cube structure, is made of cementitious matrix material and fiber-filled material；The first electrode layer, piezoresistive material Material cladding layer and the second electrode lay are sequentially distributed under a surface of the sensor base；Each layer is made of different composite materials, by respectively different extruder head, is formed the material with the mode of multilayer increasing material manufacturing and is arranged.The measurement that multi-direction stress is realized in concrete structure can be arranged in by being formed by sensor, while have good compatibility between concrete fertile material, and sensor structure intensity is higher, and reliability is stronger.
Description
Technical field
The invention belongs to intelligent building fields, and in particular to a kind of cement base piezoelectric composite material sensor.
Background technique
When measuring concrete stress state, concrete surface is generally measured using body structure surface adhering resistance formula foil gauge
Strain, the internal stress of concrete is calculated into conjunction with the elasticity modulus of concrete material.This indirect test method exists
Reference value is restricted at labyrinth, inside configuration Stress non-homogeneity or in the test of dangerous point, using the biography of flush type
Sensor is a main direction of development of the following monitoring structural health conditions.
It is compatible between intellectual material or sensor and fertile material in the health monitoring of intelligence structure or building structure
Property has conclusive effect to the performance of intellectual material sensing function.The sensing accuracy of the bad then intellectual material of compatibility can be substantially
Degree reduces.It is concrete using maximum structural material in field of civil engineering, research and development and the good intelligent material of concrete compatibility
Material or sensor are of great significance.Using cement-based material as the matrix of intelligent composite, mixes piezoceramic material and make
For functive, the cement base piezoelectric composite material that there is excellent compatibility with concrete parent can be formed.At the same time, with
The progress of increases material manufacturing technology, so that heterogeneous material increasing material manufacturing, more material increasing material manufacturing methods have also obtained extensive test,
Arrange that different material also has become possibility to form the new device being integrated in same structure.
When traditional piezoceramic transducer is arranged in concrete structure, it is easy to produce fragmentation and compatible with concrete
Property and the poor ability for failing to give full play to piezoelectric transducer of the degree of coupling, be piezoelectric transducer mainly asks what this field was applied
Topic.
Summary of the invention
In order to solve in conventional concrete measurement, embedded-type sensor structural strength and the poor problem of material compatibility,
Using more material increases material manufacturing technologies, on-demand material arranged proposes a kind of cement base pressure formed using the special distribution of material
Composite sensor, by cementitious matrix material, piezoelectricity packing material, fiber-filled material and conductive filling material according to spy
Fixed structure and distribution mode is constituted, one direction or multidirectional stress measurement, is a kind of completely new intelligent composite sensing
Device.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of cement base piezoelectric composite material sensor of the present invention, comprising: cementitious matrix material, piezoelectricity packing material, fibre
Dimension packing material and conductive filling material, feature are that entire entity structure is divided into sensor base, first electrode layer, piezoelectricity
Material cladding layer and the second electrode lay, in which: the sensor base is cube structure, is filled out by cementitious matrix material and fiber
Fill material composition；The first electrode layer, piezoresistive material Material cladding layer and the second electrode lay are sequentially distributed in the sensor base
Under one surface of body.
The first electrode layer is a sheet, with the material regularity of distribution specified in first electrode layer neutral cross section in thickness
Degree direction superimposed layer deposition is formed, and two class composite materials is distributed in section, the first kind is by cementitious matrix material and fibre
The enhancing cement composite material that is compounded to form of dimension packing material, after adding fibrous material, the stress transfer effect of composite material and
It structural strength and can be all obviously improved with the coupling effect of piezoelectric material.Second class is in the enhancing cementitious composite
The electroconductive cement composite material that addition conductive filling material is formed in material, the addition of conductive filling material can make the composite wood
Since the potential difference that material resistance generates can be ignored in the region that material is connected to good electric conductivity, the material.The increasing
Strong cement composite material is arranged in two parts region on the first electrode layer neutral cross section, and first part region is section
Outer peripheral hollow, rectangular insulation layer, the hollow, rectangular insulation layer inner boundary are rectangle, and second part region is in described
The rectangular configuration Support being evenly spaced in the hollow area in empty rectangular dielectric area, the electroconductive cement composite material are distributed in
In functional material filled region in the hollow, rectangular insulation layer in addition to the structural support area, the first electrode layer following table
Face is in conjunction with sensor base, and upper surface is in conjunction with the piezoelectric material composite layer.Structural support area be connected to external protection and
On the one hand sensor base, this part-structure protect the smart material piezoelectric ceramics in sensor structure；On the other hand
So that the stress in piezoceramics layer is closer to the actual conditions in concrete, reduce due to piezo-electricity composite material part with
Measurement error caused by modulus of elasticity of concrete difference, to improve measuring accuracy.
The material regularity of distribution and the first electrode layer phase on the piezoelectric material composite layer constituted mode and neutral cross section
Together, the difference is that arranged in the functional material filled region be in the enhancing cement composite material uniformly addition described in
The piezo-electricity composite material that piezoelectricity packing material is compounded to form；The second electrode lay composition is identical as the first electrode layer, under
Surface is in conjunction with the piezoelectric material composite layer, and upper surface is in conjunction with the external protection of the sensor base；The outer protection
Layer is the superficial layer of the sensor base, and thickness is not less than the first electrode layer, piezoresistive material Material cladding layer and the second electricity
The sum of the thickness of pole layer three, protective layer will guarantee certain thickness, to realize the good combination with concrete fertile material, together
When protection inside functional layer.
A variety of materials are arranged in specified position by more material increases material manufacturing technologies on demand, and institute is made by one-pass molding
State structure.
When device size is smaller or measurement condition in stress it is smaller when, can be that is, described using simplified sensor plan
Hollow, rectangular insulation layer inner boundary be circle, the structural support area by with the hollow, rectangular insulation layer inner circular boundary
Concentric circular boundary is surrounded.The sensor formed in this way, smart material structure is simpler, and the linearity and precision can all have
It is promoted.
What is tested after polarization due to piezo-electricity composite material is all stress on a direction, more complicated to measure
Space stress parameter is it is necessary to using the scheme of multi-direction arrangement smart material, i.e., the described first electrode layer, piezoelectric material composite layer
The functional areas constituted with the second electrode lay are arranged under three surfaces on excessively same vertex in sensor base.
Due to using increases material manufacturing technology, when technology difficulty or processing can't be obviously increased by increasing the distribution of smart material
Between, therefore the quick unit assembled scheme of multimachine of better reliability, i.e., the described first electrode layer, piezoelectric material composite layer can be used
The functional areas constituted with the second electrode lay are arranged under each surface in sensor base.
Structure after molding, the electrode zone where drilling deeply fix electrode needed for conducting wire is connected to wherein, and two
Apply high voltage direct current between electrode, complete the polarization of piezo-electricity composite material and sensor is demarcated.By sensor when use
It is arranged in required measurement position, carrying out orientation calibration after the completion of concrete preparation can be realized the measurement of multi-direction stress.
Detailed description of the invention
Fig. 1 is a kind of cement base piezoelectric composite material sensor material distribution schematic diagram of the present invention.
Fig. 2 is a kind of each material partition structural schematic diagram of cement base piezoelectric composite material sensor of the present invention.
Fig. 3 is sectional view under a kind of cement base piezoelectric composite material sensor material of the invention surface.
Fig. 4 is a kind of cement base piezoelectric composite material sensor material first electrode layer neutral cross section material distribution of the present invention
Schematic diagram.
Specific embodiment
Referring to Fig.1, Fig. 2, Fig. 3 and Fig. 4, a kind of cement base piezoelectric composite material sensor of the present invention, comprising: cement matrix
Material, PZT piezoelectricity packing material, glass fibre packing material and conductive filling material, feature are that entire entity structure divides
For sensor base 1, first electrode layer 2, piezoelectric material composite layer 3 and the second electrode lay 4, in which: the sensor base 1 is
Cube structure is made of cementitious matrix material and glass fibre packing material；The first electrode layer 2, piezoresistive material material are multiple
It closes layer 3 and the second electrode lay 4 is sequentially distributed under a surface of the sensor base 1；The first electrode layer 2 is one thin
Sheet body, with the material regularity of distribution specified in first electrode layer neutral cross section, stack deposition is formed in a thickness direction, section
Two class composite materials are distributed in face, the first kind is the enhancing being compounded to form by cementitious matrix material and glass fibre packing material
Cement composite material, the second class are the conductivity waters that addition conductive filling material is compounded to form in the enhancing cement composite material
Mud composite material, the enhancing cement composite material are arranged in two parts region on the first electrode layer neutral cross section,
First part region is the outer peripheral hollow, rectangular insulation layer 12 in section, and the hollow, rectangular insulation layer inner boundary is rectangle,
Second part region is the rectangular configuration Support 13 that is evenly spaced in the hollow area of the hollow, rectangular insulation layer 12, institute
It states electroconductive cement composite material and is distributed in the interior functional material in addition to the structural support area 13 of the hollow, rectangular insulation layer 12
In filling region, 2 lower surface of first electrode layer is combined with sensor base 1, upper surface and the piezoelectric material composite layer 3
In conjunction with；The material regularity of distribution and 2 phase of first electrode layer on 3 constituted mode of piezoelectric material composite layer and neutral cross section
Together, the difference is that arranged in the functional material filled region be in the enhancing cement composite material uniformly addition described in
The piezo-electricity composite material that PZT piezoelectricity packing material is compounded to form；The second electrode lay 4 is constituted and 2 phase of first electrode layer
Together, lower surface is combined with the piezoelectric material composite layer 3, and upper surface is combined with the external protection 11 of the sensor base 1；Institute
The superficial layer that external protection 11 is the sensor base 1 is stated, with a thickness of the first electrode layer 2, piezoresistive material Material cladding layer 3
With the sum of the thickness of 4 three of the second electrode lay.
Structure after molding, the electrode zone where drilling deeply fix electrode needed for conducting wire is connected to wherein, and two
Apply high voltage direct current between electrode, complete the polarization of piezo-electricity composite material and sensor is demarcated.By sensor when use
It is arranged in required measurement position, carrying out orientation calibration after the completion of concrete preparation can be realized the measurement of multi-direction stress.
Claims (4)
1. a kind of cement base piezoelectric composite material sensor, comprising: cementitious matrix material, piezoelectricity packing material, fiber fill material
Material and conductive filling material, feature are that entire entity structure is divided into sensor base (1), first electrode layer (2), piezoresistive material
Expect composite layer (3) and the second electrode lay (4), in which: the sensor base (1) is cube structure, by cementitious matrix material
It is constituted with fiber-filled material；The first electrode layer (2), piezoresistive material Material cladding layer (3) and the second electrode lay (4) successively divide
Cloth is under a surface of the sensor base (1)；The first electrode layer (2) is a sheet, in first electrode layer
Property section in specify the material regularity of distribution stack deposition is formed in a thickness direction, two class composite woods are distributed in section
Material, the first kind are the enhancing cement composite materials being compounded to form by cementitious matrix material and fiber-filled material, the second class be
The electroconductive cement composite material that addition conductive filling material is compounded to form in the enhancing cement composite material, the enhancing cement
For composite layout in two parts region on the first electrode layer neutral cross section, first part region is section outer edge
Hollow, rectangular insulation layer (12), the hollow, rectangular insulation layer inner boundary be rectangle, second part region be it is described hollow
The rectangular configuration Support (13) being evenly spaced in the hollow area in rectangular dielectric area (12), the electroconductive cement composite material
It is distributed in the functional material filled region in the hollow, rectangular insulation layer (12) in addition to the structural support area (13), it is described
First electrode layer (2) lower surface and sensor base (1) combine, and upper surface and the piezoelectric material composite layer (3) combine；It is described
The material regularity of distribution is identical as the first electrode layer (2) on piezoelectric material composite layer (3) constituted mode and neutral cross section, difference
Be to arrange in the functional material filled region is uniformly to add the piezoelectricity in the enhancing cement composite material to fill out
Fill the piezo-electricity composite material of Material cladding formation；The second electrode lay (4) composition is identical as the first electrode layer (2), under
Surface and the piezoelectric material composite layer (3) combine, and the external protection (11) of upper surface and the sensor base (1) combines；
The external protection (11) is the superficial layer of the sensor base (1), and thickness is not less than the first electrode layer (2), piezoelectricity
The sum of the thickness of material Material cladding layer (3) and the second electrode lay (4) three.
2. a kind of cement base piezoelectric composite material sensor according to claim 1, it is characterised in that: the hollow, rectangular
Insulation layer (12) inner boundary be circle, the structural support area (13) by with hollow, rectangular insulation layer (12) inner circular
The concentric circular boundary in boundary is surrounded.
3. according to claim 1 or a kind of cement base piezoelectric composite material sensor as claimed in claim 2, it is characterised in that:
The functional areas that the first electrode layer (2), piezoelectric material composite layer (3) and the second electrode lay (4) are constituted are arranged in sensing
On device matrix (1) under three surfaces on excessively same vertex.
4. according to claim 1 or a kind of cement base piezoelectric composite material sensor as claimed in claim 2, it is characterised in that:
The functional areas that the first electrode layer (2), piezoelectric material composite layer (3) and the second electrode lay (4) are constituted are arranged in sensing
Under each surface on device matrix (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811622860.3A CN109357795B (en) | 2018-12-28 | 2018-12-28 | Cement-based piezoelectric composite material sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811622860.3A CN109357795B (en) | 2018-12-28 | 2018-12-28 | Cement-based piezoelectric composite material sensor |
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| CN109357795A true CN109357795A (en) | 2019-02-19 |
| CN109357795B CN109357795B (en) | 2023-09-01 |
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| CN201811622860.3A Active CN109357795B (en) | 2018-12-28 | 2018-12-28 | Cement-based piezoelectric composite material sensor |
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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 |
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| Publication number | Publication date |
|---|---|
| CN109357795B (en) | 2023-09-01 |
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