CN101149302A - Sensor for monitoring/measuring stress/ strain - Google Patents
Sensor for monitoring/measuring stress/ strain Download PDFInfo
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- CN101149302A CN101149302A CNA2007101445657A CN200710144565A CN101149302A CN 101149302 A CN101149302 A CN 101149302A CN A2007101445657 A CNA2007101445657 A CN A2007101445657A CN 200710144565 A CN200710144565 A CN 200710144565A CN 101149302 A CN101149302 A CN 101149302A
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- cement
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- monitor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
A kind of sensor used for monitoring, measuring stress and strain. It can solve the problems of low sensitivity, bad consistency with concrete, bad wear and monitoring precision all time of sensing component in the present building, and the problems of expensive, complex test assistant device and low survival ratio. The sensor is made up of the alertness cement basal material and many electrodes. Many electrodes with the shape of strip, net or ring are buried in the cement basal material or pasted, plated on the material surface. The sensor of the invention can not only monitor/measure the stress of cement structure but monitor/measure the strain of concrete structure, also in the water conservancy and nuclear engineer. It has the high sensitivity, good wear, consistency and high survival ratio while buried.
Description
Technical field
The present invention relates to a kind of sensor.
Background technology
At present, widely used sensing element comprises electrical measurement sensing element and fiber sensing element in civil construction, and the sensitivity of electrical measurement sensing element is lower, poor durability, poor with the concrete compatibility, can't reach the long-term accurately purpose of monitoring.Fiber sensing element test accessory costliness, complexity, its survival rate is low, and existence and the concrete compatibility is poor, the problem of poor durability.
Summary of the invention
The present invention is low for the sensitivity that solves the sensing element that uses in the existing civil construction, poor with the concrete compatibility, poor durability and can't reach the long-term accurately purpose of monitoring; Fiber sensing element test accessory costliness, complexity, the problem that its survival rate is low provides a kind of sensor that is used to monitor/measure the field of civil engineering stress/strain, and the concrete technical scheme that addresses the above problem is as follows:
Sensor of the present invention is made up of alertness cement-based material and a plurality of electrode, a plurality of electrodes in the form of sheets, netted or ring-type, be embedded at interval in the alertness cement-based material or paste, be plated in the alertness cement-based material surface.
Alertness cement-based material is made of the potpourri of conductive material and cement-based material, and its component conductive material by weight percentage is 1～80%, and surplus is a cement-based material.
Described conductive material is by metal nickel powder or be made up of 10%～70% metal nickel powder and one or more arbitrary proportions of chopped carbon fiber, carbon fiber powder, slag, steel fibre, copper powder, graphite or carbon black by weight percentage.
Electrode adopts gold, silver, copper, stainless steel and material corrosion-resistant, that conduct electricity very well.
Electrode setting mode adopts two electrodes, three electrodes or four electrodes.
The invention has the beneficial effects as follows: mix conductive material at traditional cement-based material and make alertness cement-based material, alertness cement-based material is under the effect of load, volume resistance can produce clocklike and change, the cement-based material that mixes conductive material can pass through the stress/strain (power/distortion) of the variation perception self of resistivity, use alertness cement-based material and suitable shape, the electrode material of set-up mode can be made into different size, shape, the stress/strain of size (power/distortion) monitoring/measurement sensing element, not only can monitor/measure the stress (power) of xoncrete structure, can also monitor/measure the strain (distortion) of xoncrete structure, also can use water conservancy, other industrial circles such as nuclear engineering carry out stress/strain (power/distortion) monitoring/measurement, and have highly sensitive, permanance, good and the embedding survival rate advantages of higher of compatibility, sensor of the present invention is compared with existing sensing element (the strain sensing sensitivity coefficient as resistance strain gage only is 2～3) has stability, (the strain sensing sensitivity coefficient of this sensor is a hundreds of, even thousands of for permanance and highly sensitive advantage; Stress sensitivity can reach 0.05/MPa, even can be near 0.1/MPa, the specification of sensing element, shape, size can according to the object of monitoring/measuring mate).
Description of drawings
Fig. 1 is the structural representation that the present invention adopts rectangle four electrodes, and Fig. 2 is the structural representation of rectangle two electrodes, and Fig. 3 is the structural representation of cylindrical four electrodes, and Fig. 4 is the structural representation of cylindrical two electrodes.3 are lead-in wire among the figure.
Embodiment
Embodiment one: describe present embodiment in conjunction with Fig. 1.Present embodiment is made up of alertness cement-based material 1 and a plurality of electrode 2, a plurality of electrodes 2 in the form of sheets, netted or ring-type, be embedded at interval in the alertness cement-based material 1 or paste, be plated in the alertness cement-based material surface.
Alertness cement-based material is the potpourri of conductive material and cement-based material, and its component conductive material by weight percentage is 1～80%, and surplus is a cement-based material.
Described conductive material is made by metal nickel powder separately, perhaps is made up of 10%～70% metal nickel powder and one or more arbitrary proportions of chopped carbon fiber, carbon fiber powder, slag, steel fibre, copper powder, graphite or carbon black by weight percentage.
Electrode adopts gold, silver, copper, stainless steel and material corrosion-resistant, that conduct electricity very well.
Embodiment two: a plurality of electrode 2 shapes of present embodiment adopt sheet, netted or ring-type, and by stickup, plating or embedded mode, a plurality of electrodes 2 are set to two electrodes, three electrodes or four electrodes.
Embodiment three: describe present embodiment in conjunction with Fig. 3.Present embodiment alertness cement-based material 1 is made up of nickel powder and cement stone, nickel powder is 60.8% by weight percentage, surplus adopts with the Portland cement sill and is mixed with, adopts and build forming method, adopt the ring-type copper electrode to be embedded at interval in the alertness cement-based material 1 at four electrodes 2, sensor is of a size of 20mm * 20mm * 40mm.Its sensing relation such as table 1.
Shown that by test result the sensing element of this embodiment is highly sensitive: stress sensitivity is greater than 0.050/MPa, and strain sensitivity is higher than 895.5 (the strain sensing sensitivity coefficient as resistance strain gage only is 2～3).
Embodiment four: present embodiment alertness cement-based material 1 is made up of nickel powder, carbon black and cement stone, wherein nickel powder, carbon black be respectively by weight percentage 15%, 10% and surplus be that cement ground mass material is mixed with, adopts and build forming method, adopt ring-type stainless steel electrodes 2 to be embedded in the alertness cement-based material 1 at four electrodes 2.Sensor is of a size of 20mm * 20mm * 40mm.Its sensing relation such as table 2.
Shown the sensing element of present embodiment highly sensitive by test result: stress sensitivity is higher than 0.012/MPa, and strain sensitivity is higher than 111.86.
Table 1
| Stress (MPa) | 0 | 5 | 10 | 12.5 |
| Strain (microstrain) | 0 | 296 | 572.5 | 699.25 |
| Change in resistance rate (%) | 0 | 43.54 | 59.65 | 62.61 |
Table 2
| Stress (MPa) | 0 | 5 | 10 | 12.5 |
| Strain (microstrain) | 0 | 604 | 1157 | 1358 |
| Change in resistance rate (%) | 0 | 7.28 | 13.42 | 15.19 |
Claims (7)
1. sensor that is used to monitor/measure stress/strain, it is made up of alertness cement-based material (1) and a plurality of electrode (2), it is characterized in that a plurality of electrodes (2) in the form of sheets, netted or ring-type, be embedded at interval in the alertness cement-based material (1) or paste, be plated in the alertness cement-based material surface.
2. a kind of sensor that is used to monitor/measure stress/strain according to claim 1 is characterized in that alertness cement-based material is the potpourri of conductive material and cement-based material, and conductive material is 1～80% by weight percentage, and surplus is a cement-based material.
3. a kind of sensor that is used to monitor/measure stress/strain according to claim 2 is characterized in that described conductive material made by metal nickel powder separately.
4. a kind of sensor that is used to monitor/measure stress/strain according to claim 2 is characterized in that described conductive material is made up of 10%～70% metal nickel powder and one or more arbitrary proportions of chopped carbon fiber, carbon fiber powder, slag, steel fibre, copper powder, graphite or carbon black by weight percentage.
5. a kind of sensor that is used to monitor/measure stress/strain according to claim 1 is characterized in that a plurality of electrodes (2) adopt gold, silver, copper or stainless steel material.
6. a kind of sensor that is used to monitor/measure stress/strain according to claim 1 is characterized in that alertness cement-based material made for the Portland cement sill by 60.8% nickel powder and surplus by weight percentage.
7. a kind of sensor that is used to monitor/measure stress/strain according to claim 1, it is characterized in that alertness cement-based material is made up of nickel powder, carbon black and cement stone, be mixed with for the light water mudstone by 15% nickel powder, 10% carbon black and surplus by weight percentage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101445657A CN101149302A (en) | 2007-11-06 | 2007-11-06 | Sensor for monitoring/measuring stress/ strain |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101445657A CN101149302A (en) | 2007-11-06 | 2007-11-06 | Sensor for monitoring/measuring stress/ strain |
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| CN101149302A true CN101149302A (en) | 2008-03-26 |
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| CNA2007101445657A Pending CN101149302A (en) | 2007-11-06 | 2007-11-06 | Sensor for monitoring/measuring stress/ strain |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101493368B (en) * | 2009-03-02 | 2011-01-05 | 北京航空航天大学 | Method for producing alertness cement-based material pressure sensor and monitoring device |
| CN101710007B (en) * | 2009-12-10 | 2011-03-16 | 陈新 | Concrete wall body expansion internal stress measuring sensor and measuring method |
| CN102102328A (en) * | 2010-12-22 | 2011-06-22 | 哈尔滨工业大学 | Self-sensing pavement structure of road or bridge |
| CN102506692A (en) * | 2011-10-19 | 2012-06-20 | 西安建筑科技大学 | Cement-based intelligent composite material strain sensor and preparation method thereof |
| CN103808765A (en) * | 2014-02-14 | 2014-05-21 | 盐城工学院 | Self-monitoring intelligent textile reinforced concrete and manufacturing method thereof |
| CN104155050A (en) * | 2014-09-01 | 2014-11-19 | 济南大学 | Pressure heavy load sensor of concrete filled steel tube |
| CN105136355A (en) * | 2015-09-10 | 2015-12-09 | 江苏大学 | Sensor based on flexible carbon fiber filaments |
| CN105300575A (en) * | 2015-12-03 | 2016-02-03 | 山东大学 | Smart material sensor for monitoring bituminous pavement crushing stress, and manufacture and application methods |
| CN105336462A (en) * | 2015-12-08 | 2016-02-17 | 北京理工大学 | Resistor manufacturing method and resistor |
| CN108871180A (en) * | 2018-05-12 | 2018-11-23 | 哈尔滨工业大学 | A kind of unidirectional responsive type cement base strain transducer |
| CN111521107A (en) * | 2020-05-08 | 2020-08-11 | 武汉科技大学 | Multi-axis/field carbon fiber strain sensor and application method thereof |
| CN112521093A (en) * | 2020-12-09 | 2021-03-19 | 广州市圣丰混凝土有限公司 | Smart composition hybrid fiber concrete and preparation method thereof |
| CN114592443A (en) * | 2022-03-28 | 2022-06-07 | 东莞理工学院 | Device and method for reinforcing coastal erosion concrete |
| CN114775459A (en) * | 2022-04-02 | 2022-07-22 | 东莞理工学院 | Coastal concrete reinforcement and monitoring integrated device and method |
| CN116143476A (en) * | 2023-02-22 | 2023-05-23 | 浙江交工金筑交通建设有限公司 | Conductive concrete, application and self-detection system |
-
2007
- 2007-11-06 CN CNA2007101445657A patent/CN101149302A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101493368B (en) * | 2009-03-02 | 2011-01-05 | 北京航空航天大学 | Method for producing alertness cement-based material pressure sensor and monitoring device |
| CN101710007B (en) * | 2009-12-10 | 2011-03-16 | 陈新 | Concrete wall body expansion internal stress measuring sensor and measuring method |
| CN102102328A (en) * | 2010-12-22 | 2011-06-22 | 哈尔滨工业大学 | Self-sensing pavement structure of road or bridge |
| CN102506692A (en) * | 2011-10-19 | 2012-06-20 | 西安建筑科技大学 | Cement-based intelligent composite material strain sensor and preparation method thereof |
| CN103808765A (en) * | 2014-02-14 | 2014-05-21 | 盐城工学院 | Self-monitoring intelligent textile reinforced concrete and manufacturing method thereof |
| CN104155050A (en) * | 2014-09-01 | 2014-11-19 | 济南大学 | Pressure heavy load sensor of concrete filled steel tube |
| CN105136355A (en) * | 2015-09-10 | 2015-12-09 | 江苏大学 | Sensor based on flexible carbon fiber filaments |
| CN105300575B (en) * | 2015-12-03 | 2018-07-17 | 山东大学 | Monitor smart material sensor, making and the application method of bituminous paving compression |
| CN105300575A (en) * | 2015-12-03 | 2016-02-03 | 山东大学 | Smart material sensor for monitoring bituminous pavement crushing stress, and manufacture and application methods |
| CN105336462A (en) * | 2015-12-08 | 2016-02-17 | 北京理工大学 | Resistor manufacturing method and resistor |
| CN105336462B (en) * | 2015-12-08 | 2019-06-18 | 北京理工大学 | A kind of resistor manufacturing method and resistor |
| CN108871180A (en) * | 2018-05-12 | 2018-11-23 | 哈尔滨工业大学 | A kind of unidirectional responsive type cement base strain transducer |
| CN111521107A (en) * | 2020-05-08 | 2020-08-11 | 武汉科技大学 | Multi-axis/field carbon fiber strain sensor and application method thereof |
| CN112521093A (en) * | 2020-12-09 | 2021-03-19 | 广州市圣丰混凝土有限公司 | Smart composition hybrid fiber concrete and preparation method thereof |
| CN114592443A (en) * | 2022-03-28 | 2022-06-07 | 东莞理工学院 | Device and method for reinforcing coastal erosion concrete |
| CN114775459A (en) * | 2022-04-02 | 2022-07-22 | 东莞理工学院 | Coastal concrete reinforcement and monitoring integrated device and method |
| CN116143476A (en) * | 2023-02-22 | 2023-05-23 | 浙江交工金筑交通建设有限公司 | Conductive concrete, application and self-detection system |
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Open date: 20080326 |