CN105572330B - Cement stabilized macadam drying shrinkage, warm contracting coefficient intelligent type monitoring device and method - Google Patents
Cement stabilized macadam drying shrinkage, warm contracting coefficient intelligent type monitoring device and method Download PDFInfo
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- CN105572330B CN105572330B CN201510897084.8A CN201510897084A CN105572330B CN 105572330 B CN105572330 B CN 105572330B CN 201510897084 A CN201510897084 A CN 201510897084A CN 105572330 B CN105572330 B CN 105572330B
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- 239000004568 cement Substances 0.000 title claims abstract description 64
- 238000001035 drying Methods 0.000 title claims abstract description 22
- 238000012806 monitoring device Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims description 14
- 239000000835 fiber Substances 0.000 claims abstract description 109
- 238000012360 testing method Methods 0.000 claims abstract description 35
- 238000005096 rolling process Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 12
- 239000013307 optical fiber Substances 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 9
- 238000001228 spectrum Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 230000008602 contraction Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/42—Road-making materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses cement stabilized macadam drying shrinkage, warm contracting coefficient intelligent type monitoring device, including fiber-optic grating sensor, fiber grating demodulation equipment, monitor terminal, concrete humidity instrument, support, cement stabilized macadam test specimen is fixed on support, wherein：Sensor fibre with fiber grating is erected on support, sensor fibre one end connects fiber grating demodulation device, fiber grating demodulation device can inject continuous light to sensor fibre and receive reflected light, fiber grating demodulation device connects monitor terminal, and monitor terminal can control fiber grating demodulation device to work and receive, handle and show the information that fiber grating demodulation device is transmitted.The present invention can be more easily and accurately to cement stabilized macadam amount of contraction and temperature, the relation of humidity be monitored.
Description
Technical field
The invention belongs to the technical field of material tests, more particularly to cement stabilized macadam drying shrinkage, warm contracting coefficient are intelligent
Monitoring device and method.
Background technology
As a kind of semi-rigid material, cement stabilized macadam has that intensity is high, rigidity is big, globality and water stability are good etc. excellent
Point, it has also become the main base material of high-grade highway.But in use, cement stabilized macadam base be also easy to produce dry shrink and
Temperature shrinkage.When cement stabilized macadam base tensile strength is less than drying shrinkage and temperature contraction stress, crack will be produced, in driving lotus
Carry and reflection crack is produced under the comprehensive function with environmental factor, and then influence the performance and service life on road surface.Therefore, it is right
The drying shrinkage of cement stabilized macadam, temperature deformation research are extremely important and are worth.
Current cement stabilized macadam shrinks（Drying shrinkage and temperature contract）The detection technique of deformation is mainly amesdial method and foil gauge
Method.Cement stabilized macadam test specimen is placed on the bottom plate in device, amesdial then is installed on the support of two ends.Due to support and
Bottom plate is an entirety, so when whole experimental provision is put into temperature and humidity control instrument, in the case of temperature change, not only
Cement stabilized macadam generates temperature deformation, and the bottom plate of device generates certain deflection also with the change of temperature.Therefore,
The data that amesdial is measured are not accurate enough.In addition, the less stable of amesdial, when measuring dry-shrinkage deformed, by external environment
Disturbing influence clearly, so experiment can produce larger error.In long term monitoring temperature easily occurs for strain gauge method
Float, as a result also easily produce larger error.
The content of the invention
The technical problem to be solved in the present invention is to provide one kind using fiber grating detection, energy more accurate measurement cement
The detection means and method of the coefficient of shrinkage of the materials such as stabilization gravel, warm contracting coefficient.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
Cement stabilized macadam drying shrinkage, warm contracting coefficient intelligent type monitoring device, including the sensor fibre with fiber grating, light
Fine grating demodulation device, monitor terminal, the concrete humidity instrument of water content for detecting cement stabilized macadam test specimen and branch
Frame, cement stabilized macadam test specimen is fixed on support, wherein：Sensor fibre is erected on support, sensor fibre one end connection light
Fine grating demodulation device, fiber grating demodulation device can inject continuous light to sensor fibre and receive reflected light, fiber grating solution
Device connection monitor terminal is adjusted, monitor terminal can control fiber grating demodulation device to work and receive, handle and show optical fiber light
The information that grid demodulating equipment is transmitted.
For optimization above-mentioned technical proposal, the concrete measure taken also includes：
Above-mentioned support includes left stretcher body and right stretcher body, is not contacted between left stretcher body and right stretcher body, left stretcher body and right stretcher body
On be provided with anchor cable hole, the fiber segment of fiber grating both sides, which is each passed through at corresponding anchor cable hole, anchor cable hole, is provided with intermediate plate,
Sensor fibre is squeezed into anchor cable hole through the fixing hole in the middle part of intermediate plate, then intermediate plate, reduces the aperture of fixing hole, and then will be passed
It is photosensitive fine fixed.
Above-mentioned support is placed on bottom plate platform, and provided with rod is rolled between support and bottom plate platform, support is by rolling
Rod coordinates with bottom plate platform roll.
Above-mentioned rolling rod is glass bar.
Above-mentioned intermediate plate is sheet rubber.
Above-mentioned fiber grating demodulation device includes generating laser and data demodulator, and generating laser is used for sensing
Continuous light is injected in optical fiber, data demodulator is used to receive reflected light and demodulates reflected light spectrum.
Cement stabilized macadam coefficient of shrinkage detection method：Comprise the following steps：
Step 1: after bottom plate platform, rolling rod and support are spliced successively from the bottom to top, be put into Temperature and Humidity Control room,
Cement stabilized macadam test specimen is placed on support, and cement stabilized macadam test specimen two ends are respectively held against left stretcher body and right stretcher body, will be sensed
Optical fiber is erected on support and connects fiber grating demodulation device；
Step 2: carrying out the check of light path, it is to avoid the generation of sensor fibre light path disruption；
Step 3: control room temperature is set as into 20 DEG C ± 1 DEG C, relative humidity control is 60% ± 5%；
Step 4: placing concrete humidity instrument, concrete humidity instrument automatic detection water in cement stabilized macadam surface of test piece
The change of moisture content of cement-stabilizing broken stone, and pass the information on to monitor terminal；
Step 5: fiber grating demodulation device injects continuous light into sensor fibre, and receive the reflected light of fiber grating
Spectrum, fiber grating demodulation device is by the wavelength data input monitoring terminal processes after demodulation；
Step 6: wavelength data is scaled the coefficient of shrinkage of cement stabilized macadam test specimen by monitor terminal, and information is real
When show.
The detection method of cement stabilized macadam temperature contracting coefficient：Comprise the following steps：
Step 1: after bottom plate platform, rolling rod and support are spliced successively from the bottom to top, be put into Temperature and Humidity Control room,
Cement stabilized macadam test specimen is placed on support, and cement stabilized macadam test specimen two ends are respectively held against left stretcher body and right stretcher body, will be sensed
Optical fiber is erected on support and connects fiber grating demodulation device；
Step 2: carrying out the check of light path, it is to avoid the generation of sensor fibre light path disruption；
Step 3: control room temperature is set as into 40 DEG C~-20 DEG C, tests since high temperature, cool step by step, every grade of temperature difference
10 DEG C, every grade is incubated 3 hours；Start within last 5 minutes measurement in insulation；
Step 4: fiber grating demodulation device injects continuous light into sensor fibre, and receive the reflected light of fiber grating
Spectrum, fiber grating demodulation device is by the wavelength data input monitoring terminal processes after demodulation；
Step 6: wavelength data is scaled the warm contracting coefficient of cement stabilized macadam test specimen by monitor terminal, and information is real
When show.
Fiber Bragg Grating technology is a kind of optical fiber sensing technology based on wave zone, and its sensing element is fiber grating.Optical fiber light
Gate sensor not only has the advantages that electromagnetism interference, corrosion-resistant, good endurance, small volume, lightweight, but also with other
The unrivaled advantage of fibre optical sensor of type, mainly has：It is come transducing signal, rather than with signal with Wavelength-encoding
Amplitude response, it is fixed to the joints of optical fibre and coupler, fibre-optical bending, flashing etc. without any indemnifying measure；In wavelength-division or
In the application of time-division Multi-parameter sensing, an instrument is only needed to achieve that inquiry location, it is easy to make fiber optic sensor network；Fiber grating
Non-sensitive part be written in fibre core, the sensor being made from it without the joints of optical fibre, Automatic manual transmission, grinding technics and alignment work
Skill；Fiber-optic grating sensor sensitivity is high, dynamic range is big etc..The present invention is passed using fiber bragg grating center wavelength drift and optical fiber
Sense the linear relationship of variable, the drying shrinkage strain of monitor cement stabilized macadam and warm shrinkage strain, greatly reduce reality
Test error.
Except using fiber grating, the present invention couple has also done a large amount of innovative designs.By the bottom plate platform and support in device
Separate, can so avoid due to the error in the next data of the Zona transformans of bottom plate platform.Water is detected using concrete humidity instrument
The change of moisture content of cement-stabilizing broken stone, improves automaticity.Monitoring result is imported with MATLAB in time by programming
In the monitor terminal of software, reduce the intensity of data processing, reduce the probability of error, drying shrinkage, warm contracting coefficient change more
Plus it is directly perceived.
Compared with amesdial method, strain gauge method, apparatus and method of the present invention detection drying shrinkage, warm contracting coefficient are more superior,
The data measured are more accurate reasonable, and fiber grating can be reused.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is cement stabilized macadam monitoring device side schematic view；
Fig. 3 is anchor cable hole intermediate plate schematic diagram.
Reference therein is：Fiber grating 1, fiber grating demodulation device 2, monitor terminal 3, bottom plate platform 4, rolling
Rod 5, cement stabilized macadam test specimen 6, support 7, anchor cable hole 71, intermediate plate 72, concrete humidity instrument 8.
Embodiment
Technical scheme is elaborated below in conjunction with the accompanying drawings.
Cement stabilized macadam drying shrinkage, warm contracting coefficient intelligent type monitoring device, including the sensor fibre with fiber grating 1,
The concrete humidity instrument 8 of fiber grating demodulation device 2, monitor terminal 3, water content for detecting cement stabilized macadam test specimen 6
And support 7, cement stabilized macadam test specimen 6 is fixed on support 7, wherein：Sensor fibre is erected on support 7, sensor fibre
One end connection fiber grating demodulation device 2, fiber grating demodulation device 2 can inject continuous light to sensor fibre and receive reflection
Light, the connection monitor terminal 3 of fiber grating demodulation device 2, monitor terminal 3 can control fiber grating demodulation device 2 to work and receive,
The information that processing and display fiber grating demodulation device 2 are transmitted.
In embodiment, support 7 includes left stretcher body and right stretcher body, is not contacted between left stretcher body and right stretcher body, left stretcher body and the right side
Anchor cable hole 71 is provided with support body, the fiber segment of the both sides of fiber grating 1 is each passed through at corresponding anchor cable hole 71, anchor cable hole 71
Intermediate plate 72 is provided with, sensor fibre is squeezed into anchor cable hole 71 through the fixing hole in the middle part of intermediate plate 72, then intermediate plate 72, makes fixing hole
Aperture reduce, and then sensor fibre is fixed.
In embodiment, support 7 is placed on bottom plate platform 4, provided with rolling rod 5, support 7 between support 7 and bottom plate platform 4
Coordinated by rolling rod 5 and being rolled with bottom plate platform 4.
In embodiment, rolling rod 5 is glass bar.
In embodiment, intermediate plate 72 is sheet rubber.
In embodiment, fiber grating demodulation device 2 include generating laser and data demodulator, generating laser be used for
Continuous light is injected in sensor fibre, data demodulator is used to receive reflected light and demodulates reflected light spectrum.
Cement stabilized macadam coefficient of shrinkage detection method：Comprise the following steps：
Step 1: after bottom plate platform 4, rolling rod 5 and support 7 are spliced successively from the bottom to top, being put into Temperature and Humidity Control room
In, cement stabilized macadam test specimen 6 is placed on support 7, and the two ends of cement stabilized macadam test specimen 6 are respectively held against left stretcher body and right stretcher body,
Sensor fibre is erected on support 7 and fiber grating demodulation device 2 is connected；
Step 2: carrying out the check of light path, it is to avoid the generation of sensor fibre light path disruption；
Step 3: control room temperature is set as into 20 DEG C ± 1 DEG C, relative humidity control is 60% ± 5%；
Step 4: placing concrete humidity instrument 8, the automatic detection of concrete humidity instrument 8 on the surface of cement stabilized macadam test specimen 6
The change of moisture content of cement stabilized macadam, and pass the information on to monitor terminal 3；
Step 5: fiber grating demodulation device 2 injects continuous light into sensor fibre, and receive the reflection of fiber grating 1
Spectrum, fiber grating demodulation device 2 handles the wavelength data input monitoring terminal 3 after demodulation；
Step 6: wavelength data is scaled the coefficient of shrinkage of cement stabilized macadam test specimen 6 by monitor terminal 3,
Finally, the strain of measurement, water content information are imported into 9 MATLAB programs by programming.By MATLAB journeys
Sequence shows the coefficient of shrinkage of cement stabilized macadam in real time.
The operation principle of the present invention is to be anchored at sensor fibre to produce with cement stabilized macadam drying shrinkage temperature deformation
On the anchorage of displacement, using fiber bragg grating center wavelength drift and the linear relationship of Fibre Optical Sensor dependent variable, cement stabilizing is monitored
The rule of development of rubble drying shrinkage, temperature deformation.
Coefficient of shrinkage reduction formula（1）It is as follows：
（1）
In formula：
--- ith percentage of water loss (%)；
--- ith drying shrinkage strains (%)；
--- the coefficient of shrinkage, refer to the linear contractive quotiety of the lower material of unit humidity change.
The detection method of cement stabilized macadam temperature contracting coefficient：Comprise the following steps：
Step 1: after bottom plate platform 4, rolling rod 5 and support 7 are spliced successively from the bottom to top, being put into Temperature and Humidity Control room
In, cement stabilized macadam test specimen 6 is placed on support 7, and the two ends of cement stabilized macadam test specimen 6 are respectively held against left stretcher body and right stretcher body,
Sensor fibre is erected on support 7 and fiber grating demodulation device 2 is connected；
Step 2: carrying out the check of light path, it is to avoid the generation of sensor fibre light path disruption；
Step 3: control room temperature is set as into 40 DEG C~-20 DEG C, tests since high temperature, cool step by step, every grade of temperature difference
10 DEG C, every grade is incubated 3 hours；Start within last 5 minutes measurement in insulation；
Step 4: fiber grating demodulation device 2 injects continuous light into sensor fibre, and receive the reflection of fiber grating 1
Spectrum, fiber grating demodulation device 2 handles the wavelength data input monitoring terminal 3 after demodulation；
Step 6: wavelength data is scaled the warm contracting coefficient of cement stabilized macadam test specimen 6 by monitor terminal 3, and by information
Display in real time.
Pass through formula（2）Calculate warm contracting coefficient.
（2）
In formula：
--- i-th of temperature range (DEG C) of temperature control program setting；
--- the average shrinkage strain (%) at a temperature of i-th；
--- warm contracting coefficient, refer to the linear contractive quotiety of the lower material of unit temperature change.
It the above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
For those of ordinary skill, some improvements and modifications without departing from the principles of the present invention should be regarded as the protection of the present invention
Scope.
Claims (7)
1. cement stabilized macadam drying shrinkage, warm contracting coefficient intelligent type monitoring device, including the sensor fibre with fiber grating (1),
Fiber grating demodulation device (2), monitor terminal (3), water content for detecting cement stabilized macadam test specimen (6) concrete it is wet
Instrument (8) and support (7) are spent, cement stabilized macadam test specimen (6) is fixed on support (7), it is characterized in that：Described sensor fibre
It is erected on support (7), sensor fibre one end connection fiber grating demodulation device (2), described fiber grating demodulation device (2)
Continuous light can be injected to sensor fibre and reflected light is received, described fiber grating demodulation device (2) connection monitor terminal (3),
Described monitor terminal (3) can control fiber grating demodulation device (2) to work and receive, handles and show that fiber grating demodulation is filled
Put the information that (2) are transmitted；Described support (7) includes left stretcher body and right stretcher body, is not contacted between left stretcher body and right stretcher body, described
Left stretcher body and right stretcher body on be provided with anchor cable hole (71), the fiber segment of described fiber grating (1) both sides is each passed through phase
The anchor cable hole (71) answered, described anchor cable hole (71) place is provided with intermediate plate (72), and described sensor fibre is passed through in intermediate plate (72)
The fixing hole in portion, then intermediate plate (72) squeeze into anchor cable hole (71), reduce the aperture of fixing hole, and then sensor fibre is consolidated
It is fixed.
2. cement stabilized macadam drying shrinkage according to claim 1, warm contracting coefficient intelligent type monitoring device, it is characterized in that：Institute
The support (7) stated is placed on bottom plate platform (4), provided with rolling rod (5), described branch between support (7) and bottom plate platform (4)
Frame (7) is coordinated by rolling rod (5) and being rolled with bottom plate platform (4).
3. cement stabilized macadam drying shrinkage according to claim 2, warm contracting coefficient intelligent type monitoring device, it is characterized in that：Institute
The rolling rod (5) stated is glass bar.
4. cement stabilized macadam drying shrinkage according to claim 3, warm contracting coefficient intelligent type monitoring device, it is characterized in that：Institute
The intermediate plate (72) stated is sheet rubber.
5. cement stabilized macadam drying shrinkage according to claim 1, warm contracting coefficient intelligent type monitoring device, it is characterized in that：Institute
The fiber grating demodulation device (2) stated includes generating laser and data demodulator, and described generating laser is used for sensing
Continuous light is injected in optical fiber, described data demodulator is used to receive reflected light and demodulates reflected light spectrum.
6. cement stabilized macadam drying shrinkage, warm contracting coefficient intelligent type monitoring device detection cement described in a kind of utilization claim 1
The method of the stabilization gravel coefficient of shrinkage：It is characterized in that：Comprise the following steps：
Step 1: after bottom plate platform (4), rolling rod (5) and support (7) are spliced successively from the bottom to top, being put into Temperature and Humidity Control
In room, cement stabilized macadam test specimen (6) is placed on support (7), cement stabilized macadam test specimen (6) two ends be respectively held against left stretcher body and
Right stretcher body, sensor fibre is erected on support (7) and fiber grating demodulation device (2) is connected；
Step 2: carrying out the check of light path, it is to avoid the generation of sensor fibre light path disruption；
Step 3: control room temperature is set as into 20 DEG C ± 1 DEG C, relative humidity control is 60% ± 5%；
Step 4: placing concrete humidity instrument (8) on cement stabilized macadam test specimen (6) surface, concrete humidity instrument (8) is examined automatically
The change of moisture content of cement stabilized macadam is surveyed, and is passed the information on to monitor terminal (3)；
Step 5: fiber grating demodulation device (2) injects continuous light into sensor fibre, and receive the reflection of fiber grating (1)
Spectrum, fiber grating demodulation device (2) handles the wavelength data input monitoring terminal (3) after demodulation；
Step 6: wavelength data is scaled the coefficient of shrinkage of cement stabilized macadam test specimen (6) by monitor terminal (3), and by information
Display in real time.
7. cement stabilized macadam drying shrinkage, warm contracting coefficient intelligent type monitoring device detection cement described in a kind of utilization claim 1
The method of stabilization gravel temperature contracting coefficient：It is characterized in that：Comprise the following steps：
Step 1: after bottom plate platform (4), rolling rod (5) and support (7) are spliced successively from the bottom to top, being put into Temperature and Humidity Control
In room, cement stabilized macadam test specimen (6) is placed on support (7), cement stabilized macadam test specimen (6) two ends be respectively held against left stretcher body and
Right stretcher body, sensor fibre is erected on support (7) and fiber grating demodulation device (2) is connected；
Step 2: carrying out the check of light path, it is to avoid the generation of sensor fibre light path disruption；
Step 3: control room temperature is set as into 40 DEG C~-20 DEG C, tests since high temperature, cool step by step, every grade of temperature difference 10
DEG C, every grade is incubated 3 hours；Start within last 5 minutes measurement in insulation；
Step 4: fiber grating demodulation device (2) injects continuous light into sensor fibre, and receive the reflection of fiber grating (1)
Spectrum, fiber grating demodulation device (2) handles the wavelength data input monitoring terminal (3) after demodulation；
Step 6: wavelength data is scaled the warm contracting coefficient of cement stabilized macadam test specimen (6) by monitor terminal (3), and by information
Display in real time.
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| CN108439839A (en) * | 2018-03-09 | 2018-08-24 | 南京航空航天大学 | A kind of composite outer doping material and test method improving cement stabilized macadam cracking resistance |
| CN109342249A (en) * | 2018-12-05 | 2019-02-15 | 郑州大学 | Polypropylene Fiber Reinforced Cement Stabilized Macadam shrinkage test method |
| CN110456032B (en) * | 2019-09-23 | 2024-02-13 | 中国电建集团贵阳勘测设计研究院有限公司 | Temperature shrinkage and dry shrinkage integrated intelligent test equipment for inorganic binder stabilizing material |
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| CN2600810Y (en) * | 2003-02-21 | 2004-01-21 | 中国科学院武汉岩土力学研究所 | True triaxil stress rock fissure seepage test deformation investigating device |
| CN100578221C (en) * | 2005-10-12 | 2010-01-06 | 中国建筑材料科学研究院 | Method and apparatus for measuring rapid drying shrinkage of cement-based material |
| CN101520317B (en) * | 2009-04-10 | 2011-10-26 | 山东大学 | Rock deforming and cracking three-dimensional dynamic testing system based on fiber strain sensing |
| CN101900533A (en) * | 2010-07-23 | 2010-12-01 | 水利部交通运输部国家能源局南京水利科学研究院 | Optical fiber grating measurement method for monitoring embankment section settlement |
| CN102168950B (en) * | 2010-12-20 | 2012-08-15 | 中铁隧道集团有限公司 | Method of using distributed optical fibers for advanced monitoring of tunnel surrounding rock deformation |
| CN102507635B (en) * | 2011-10-14 | 2013-08-21 | 上海伊索热能技术有限公司 | Method for measuring heating shrinkage rate of ceramic fiber product |
| CN203432546U (en) * | 2013-08-21 | 2014-02-12 | 合肥容知测控仪器有限公司 | Fiber-bragg-grating concrete-embedded strain sensing system |
| CN103512686A (en) * | 2013-10-12 | 2014-01-15 | 青岛理工大学 | Static pressure high-strength prestressed concrete pipe pile body stress testing device |
| CN103760327A (en) * | 2014-01-21 | 2014-04-30 | 深圳大学 | Concrete shrinkage measuring instrument |
| CN104729421A (en) * | 2015-04-01 | 2015-06-24 | 南京航空航天大学 | Distributed sensing optical fiber device capable of monitoring basic level crack and monitoring method thereof |
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