CN202453128U - Sensor made of carbon nano tube cement based composite materials - Google Patents
Sensor made of carbon nano tube cement based composite materials Download PDFInfo
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- CN202453128U CN202453128U CN2012201065809U CN201220106580U CN202453128U CN 202453128 U CN202453128 U CN 202453128U CN 2012201065809 U CN2012201065809 U CN 2012201065809U CN 201220106580 U CN201220106580 U CN 201220106580U CN 202453128 U CN202453128 U CN 202453128U
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- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 239000004568 cement Substances 0.000 title abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title abstract description 7
- 239000002041 carbon nanotube Substances 0.000 title abstract 6
- 229910021393 carbon nanotube Inorganic materials 0.000 title abstract 6
- 239000011159 matrix material Substances 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 abstract description 13
- 230000036541 health Effects 0.000 abstract description 8
- 239000011259 mixed solution Substances 0.000 abstract description 3
- 229910001111 Fine metal Inorganic materials 0.000 abstract 1
- 239000002270 dispersing agent Substances 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
一种碳纳米管水泥基复合材料传感器。将碳纳米管在分散剂中分散形成混合溶液，加入水泥中成型碳纳米管水泥基复合材料传感器基体，在基体内放置四片导电性能良好的细密的金属网片。金属网片的顶部提前焊接导电金属电极和接线柱。该碳纳米管水泥基复合材料传感器在水泥混凝土标准养护室养护，至规定龄期。碳纳米管水泥基复合材料制作的传感器，将传感器嵌入工程结构需要监测的重要节点与部位，可方便测定监测位置应力变化情况，进行工程结构健康监测。传感器与混凝土环境介质良好匹配，减少测量误差。
A carbon nanotube cement-based composite material sensor. Disperse carbon nanotubes in a dispersant to form a mixed solution, add cement to form a carbon nanotube cement-based composite sensor matrix, and place four fine metal mesh sheets with good electrical conductivity in the matrix. The top of the metal mesh sheet is welded with conductive metal electrodes and terminals in advance. The carbon nanotube cement-based composite material sensor is cured in a cement concrete standard curing room until the specified age. The sensor made of carbon nanotube cement-based composite material is embedded in the important nodes and parts of the engineering structure that need to be monitored, which can conveniently measure the stress change of the monitoring position and carry out health monitoring of the engineering structure. The sensor is well matched with the concrete environment medium, reducing measurement errors.
Description
Technical field
The present invention relates to a kind of engineering structure monitoring sensor.
Background technology
The Important Project structure is carried out the accumulated damage of real-time health monitoring, timely recognition structure and assessed its usability and life-span; Disaster to occurring gives warning in advance, and sets up corresponding safe early warning mechanism, not only has great scientific meaning for the security and the reliability that improve structure; And can reduce the operation and maintenance cost of structure; Having considerable economic, become the inevitable requirement of following engineering, also is the important topic that the 21 century mankind need to be resolved hurrily.In the real-time health monitoring systems of engineering structure, sensor subsystem is made up of a plurality of various kinds of sensors and sensing network as health monitoring systems foremost and the most basic subsystem.Sensor can be used for the load and the response message of perceptual structure, and exports with physical quantity forms such as electricity, light, sound.Perception material that grows up at present and sensing element mainly contain light transmitting fiber, resistance-strain silk, fatigue lifetime silk, piezoelectric, carbon fibre, semiconductor material and marmem etc.Can make large-scale surface adhesion type or flush type sensing distribution array with these perception materials and sensing element, thereby make the important component of structure or integral body have apperceive characteristic, with the function of implementation structure monitoring in real time with safe early warning.These sensors are used in the concrete works monitoring structural health conditions and are also had some drawbacks and problem.The utility appliance a large amount of like the needs of Fibre Optical Sensor, the difficulty of deploying to ensure effective monitoring and control of illegal activities, cost is expensive; Piezoelectric (like piezoelectric ceramics etc.) is used for simple member more in application, and does not match on material with concrete material, and lacks project quality inspection; Marmem or expensive, or unstable properties, and in the non-resilient stage, the relation of resistance and strain is non-linear, brings difficulty etc. to signal analysis.In order to reduce measuring error, guarantee that the coupling of sensor and surrounding medium is very important.In the real-time health monitoring of large-scale concrete engineering structure, need to utilize new sensitive material to develop novel sensor with cement concrete medium coupling, reach the good result that sensor and surrounding medium mate fully.
CNT is as the ultimate fibrous material that has the superelevation length-diameter ratio; Not only has excellent mechanical property; And chemical stability and good heat stability; Have characteristics such as good electrical properties and microwave absorbing, make it become the desirable enhancing body of various matrix materials, and can give corresponding compound substance many new functional performances.CNT serves as the enhancing body of cement material, can make the CNT cement-base composite material have better resistive performance and voltage-sensitive effect, and volume is that 0.5% CNT just can be so that corresponding cement-based material resistivity be reduced to hundreds of ohm.The pressure drag characteristic research result of CNT cement-base composite material shows that this composite material resistance changes with compressive stress, and is reliable and stable, can be used as sensor application in civil engineering structure.Therefore the Research And Engineering of novel CNT cement-base composite material sensor technology is used and will be had extremely important theory significance and practical value.
Summary of the invention
The present invention utilizes the CNT cement-base composite material to make sensor, is used for the real-time health monitoring of engineering structure, guarantees the coupling of sensor and concrete environment medium, reduces measuring error, and technical scheme is following:
1, CNT disperses to form mixed solution in spreading agent, adds in the cement to stir the sensor base moulding.The matrix size can be distinguished the moulding different specifications according to actual needs.
2, arrange the fixedly good fine and closely woven wire netting sheet of four electric conductivities of specification in the sensor base.
3, in sensor base, insert four conductive metal electrodes, each electrode all reliably is connected (can weld) with a slice conductive metal mesh sheet.
4, four electrode tops all connect the conducting metal binding post, and binding post stretches out sensor base, can external wire.
5, two binding posts in outside two ends connect the input end lead, and two binding posts of inside middle connect wire of output terminal.
6, sensor base is carried out maintenance according to cement testing standard curing method, reaches the length of time of regulation.
Content of the present invention produces following beneficial effect:
(1) sensor of CNT cement-base composite material making embeds important node and the position that engineering structure need be monitored with sensor, can conveniently measure monitoring location STRESS VARIATION situation, carries out engineering structure health monitoring;
(2) sensor and concrete environment medium matched well reduce measuring error;
(3) sensor production is simple, invests less;
(4) the sensor external wire is convenient, and input end and output terminal utilize terminal-connecting lead, and be easy to use.
Description of drawings
Fig. 1 is a CNT cement-base composite material sensor construction synoptic diagram;
Fig. 2 is a CNT cement-base composite material sensor section synoptic diagram.
Among the figure:
1---CNT cement-base composite material matrix; 2---wire netting sheet in the CNT cement-base composite material matrix; 3---sensor electrode; 4---sensor conductor binding post (input end); 5---sensor conductor binding post (output terminal).
Embodiment
With reference to accompanying drawing, embodiments of the invention are described in detail.
At first; CNT is disperseed to form mixed solution in spreading agent; Add in the cement and stir (CNT volume be cement weight 1%); Moulding CNT cement-base composite material sensor base 1, CNT cement-base composite material sensor base dimensions can be made as 30mm * 30mm * 120mm.Then, in matrix, insert the good fine and closely woven wire netting sheet 2 of four electric conductivities of size 30mm * 30mm, the net sheet is 30mm at interval.The top of wire netting sheet shifts to an earlier date welding conductive metal electrode 3 and binding post 4 (input end), binding post 5 (output terminal).This CNT cement-base composite material sensor is in the maintenance of cement concrete standard curing room, and to stipulating the length of time (28 days), sensor production is accomplished.
Claims (1)
1. CNT cement-base composite material sensor; Comprise CNT cement-base composite material sensor base, fine and closely woven wire netting sheet, conductive metal electrode and binding post that electric conductivity is good; It is characterized in that: the sensor base material is the CNT cement-base composite material; Place four fine and closely woven wire netting sheets that electric conductivity is good in the matrix, the top of wire netting sheet is conductive metal electrode and binding post.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012201065809U CN202453128U (en) | 2012-03-14 | 2012-03-14 | Sensor made of carbon nano tube cement based composite materials |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012201065809U CN202453128U (en) | 2012-03-14 | 2012-03-14 | Sensor made of carbon nano tube cement based composite materials |
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| CN202453128U true CN202453128U (en) | 2012-09-26 |
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| CN2012201065809U Expired - Fee Related CN202453128U (en) | 2012-03-14 | 2012-03-14 | Sensor made of carbon nano tube cement based composite materials |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103024940A (en) * | 2012-12-26 | 2013-04-03 | 山东科技大学 | Carbon nano tube cement based composite sensor testing system |
| CN103033207A (en) * | 2012-12-26 | 2013-04-10 | 山东科技大学 | Carbon nanometer tube cement based composite material sensor encapsulating method |
| CN103274646A (en) * | 2013-06-13 | 2013-09-04 | 大连海事大学 | Stress sensor made of graphene oxide cement-based composite material |
| CN103308222A (en) * | 2012-03-14 | 2013-09-18 | 山东科技大学 | Carbon nano tube (CNT) cement based composite material sensor |
| CN114459657A (en) * | 2022-04-14 | 2022-05-10 | 西南交通大学 | Shock load automatic identification method, electronic device and storage medium |
| CN115615817A (en) * | 2022-05-12 | 2023-01-17 | 苏州鑫宸达科技有限公司 | Bridge beam supports monitoring system based on CNT cement base sensor |
-
2012
- 2012-03-14 CN CN2012201065809U patent/CN202453128U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308222A (en) * | 2012-03-14 | 2013-09-18 | 山东科技大学 | Carbon nano tube (CNT) cement based composite material sensor |
| CN103024940A (en) * | 2012-12-26 | 2013-04-03 | 山东科技大学 | Carbon nano tube cement based composite sensor testing system |
| CN103033207A (en) * | 2012-12-26 | 2013-04-10 | 山东科技大学 | Carbon nanometer tube cement based composite material sensor encapsulating method |
| CN103274646A (en) * | 2013-06-13 | 2013-09-04 | 大连海事大学 | Stress sensor made of graphene oxide cement-based composite material |
| CN114459657A (en) * | 2022-04-14 | 2022-05-10 | 西南交通大学 | Shock load automatic identification method, electronic device and storage medium |
| CN114459657B (en) * | 2022-04-14 | 2022-07-01 | 西南交通大学 | Impact load automatic identification method, electronic device and storage medium |
| CN115615817A (en) * | 2022-05-12 | 2023-01-17 | 苏州鑫宸达科技有限公司 | Bridge beam supports monitoring system based on CNT cement base sensor |
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Granted publication date: 20120926 Termination date: 20150314 |
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