CN203479647U - Temperature-control dynamic triaxial parameter measurement system - Google Patents
Temperature-control dynamic triaxial parameter measurement system Download PDFInfo
- Publication number
- CN203479647U CN203479647U CN201320537294.2U CN201320537294U CN203479647U CN 203479647 U CN203479647 U CN 203479647U CN 201320537294 U CN201320537294 U CN 201320537294U CN 203479647 U CN203479647 U CN 203479647U
- Authority
- CN
- China
- Prior art keywords
- fiber grating
- sensor
- temperature
- optical fiber
- grating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The utility model provides a temperature-control dynamic triaxial parameter measurement system for measuring dynamic parameters of a soil sample to be measured under different temperatures. The temperature-control dynamic triaxial parameter measurement system comprises a test chamber, an optical fiber grating acceleration sensor, an optical fiber grating speed sensor, an optical fiber grating displacement sensor, optical fiber grating temperature sensors, sensing optical fibers and a processing unit, wherein the soil sample to be measured is arranged in the test chamber; the optical fiber grating acceleration sensor, the optical fiber grating speed sensor and the optical fiber grating displacement sensor are arranged on the top of the soil sample to be measured; the optical fiber grating temperature sensors are arranged in the test chamber; the processing unit comprises a demodulator; the optical fiber grating acceleration sensor, the optical fiber grating speed sensor, the optical fiber grating displacement sensor and the optical fiber grating temperature sensors are electrically connected with the demodulator respectively through the sensing optical fibers. The temperature-control dynamic triaxial parameter measurement system disclosed by the utility model is high in temperature stability and high in precision and sensitivity, and the influence on the performance of the sensors caused by temperature change is avoided.
Description
Technical field
The utility model relates to a kind of measurement system, relates in particular to the moving three axle parameter measurement systems of a kind of temperature control
.
Background technology
In railway and highway subgrade process of construction, due under cyclic load, the kinetic parameter of the soil body is tested and is very important.The dynamic perfromance of soil mainly refers to native deformation characteristic and strength characteristics.Indoor, carry out native Dynamic Characteristics Test, mainly comprise the content of two aspects: (1) determines native fatigue resistance, in order to analyze the thixotropy problem of the stability, particularly sandy soil of ground and works under large deformation condition; (2) determine modulus of shearing and damping ratio, in order to calculate under small deformation condition the soil body, caused displacement, speed, acceleration or stress is over time within the specific limits.
Dynamic triaxial apparatus is the most conventional testing equipment of test dynamical parameter of soil body.Common dynamic triaxial apparatus only can be tested the kinetic parameter of the soil body under normal temperature.Lot of experiments research shows, the kinetic parameter of the soil body varies with temperature and changes.Yet along with the development of national economy, the construction of high-speed railway and highway is dispersed throughout all parts of the country, comprises the Qinghai-Tibet Platean that has ever frost, and wide season on a large scale frost zone.Therefore, under normal temperature, the kinetic parameter of the soil body is the soil body that can not be applied to ever frost and freeze thawing circulation time.If can throughput the kinetic parameter of examining system soil body when obtaining that arbitrary temp is especially just freezing and just melting, can for Permafrost Area and season frost zone railway and design and the construction of highway parameter data is provided.
The test macro of common moving triaxial tester is owing to being under normal temperature effect, and its testing sensor adopts common temperature, ess-strain and acceleration transducer just can meet measurement requirement.These sensors are all based on resistance or electromagnetism ultimate principle, to reach the object of test, the obviously sensitivity of sensor and the impact that precision is subject to temperature.Especially when low temperature and hot environment, a lot of sensors, by cisco unity malfunction, cannot be measured the kinetic parameter of the soil body while freezing with melting state.
Utility model content
The utility model, in order to overcome the deficiencies in the prior art, provides the temperature control that a kind of temperature stability is good moving three axle parameter measurement systems
.
To achieve these goals, the utility model provides a kind of temperature control to move three axle parameter measurement systems, for measuring the kinetic parameter of soil sample to be measured under different temperatures, comprise test cabinet, optical fibre grating acceleration sensor, fiber grating speed pickup, fiber grating displacement sensor, fiber-optical grating temperature sensor, sensor fibre and processing unit.Soil sample to be measured is arranged in test cabinet.Optical fibre grating acceleration sensor is arranged at the top of soil sample to be measured.Fiber grating speed pickup is arranged at the top of soil sample to be measured.Fiber grating displacement sensor is arranged at the top of soil sample to be measured.Fiber-optical grating temperature sensor is arranged in test cabinet.Sensor fibre connects optical fibre grating acceleration sensor, fiber grating speed pickup, fiber grating displacement sensor and fiber-optical grating temperature sensor.Processing unit comprises (FBG) demodulator.Optical fibre grating acceleration sensor, fiber grating speed pickup, fiber grating displacement sensor and fiber-optical grating temperature sensor are electrically connected (FBG) demodulator by sensor fibre respectively.
In an embodiment of the present utility model, processing unit also comprises microcomputer control terminal, is electrically connected (FBG) demodulator.
In sum, the moving three axle parameter measurement systems of temperature control that the utility model provides are converted into the displacement of the temperature of test cabinet and soil sample to be measured, speed and acceleration the wavelength variations of light signal, parsing by (FBG) demodulator to wavelength, thus each physical quantity to be measured obtained.Fiber-optic grating sensor is according to the variation of optic fiber grating wavelength, to obtain the physical quantity of soil sample to be measured, be not subject to the impact of temperature, avoid the impact of temperature variation on the performance of sensor own, overcome the defect that existing sensor can not obtain soil sample kinetic parameter under high temperature and low-temperature condition.Each sensor is integrated into sensor fibre and is connected to processing unit, due to its transmission be light signal, be therefore subject to the impact of temperature and electromagnetic interference (EMI) smaller, loss is little, and there is good insulativity and corrosion resistance, can effectively improve precision and the reliability of test data.The operating temperature range of this measurement system is-40 ℃ ~ 300 ℃, can meet the requirement that moving three axles of temperature control measure, for the kinetic parameter of Accurate Measurement soil sample provides strong technical guarantee.
For above-mentioned and other objects, features and advantages of the present utility model can be become apparent, preferred embodiment cited below particularly, and coordinate accompanying drawing, be described in detail below.
Accompanying drawing explanation
Figure 1 shows that the schematic diagram of the moving three axle parameter measurement systems of temperature control that the utility model provides.
Embodiment
Figure 1 shows that the schematic diagram of the moving three axle parameter measurement systems of temperature control that the utility model provides.As shown in Figure 1, the moving three axle parameter measurement systems of temperature control that the utility model provides, for measuring the kinetic parameter of soil sample to be measured under different temperatures, comprise test cabinet 8, optical fibre grating acceleration sensor 2, fiber grating speed pickup 3, fiber grating displacement sensor 5, fiber-optical grating temperature sensor 4, sensor fibre 1 and processing unit 6.
Soil sample 7 to be measured is arranged in test cabinet 8.Optical fibre grating acceleration sensor 2 is arranged at the top of soil sample 7 to be measured.Fiber grating speed pickup 3 is arranged at the top of soil sample 7 to be measured.Fiber grating displacement sensor 5 is arranged at the top of soil sample 7 to be measured.Fiber-optical grating temperature sensor 4 is arranged in test cabinet 8.Sensor fibre 1 connects optical fibre grating acceleration sensor 2, fiber grating speed pickup 3, fiber grating displacement sensor 5 and fiber-optical grating temperature sensor 4.Processing unit 6 comprises (FBG) demodulator and microcomputer control terminal.Optical fibre grating acceleration sensor 2, fiber grating speed pickup 3, fiber grating displacement sensor 5 and fiber-optical grating temperature sensor 4 are electrically connected (FBG) demodulator by sensor fibre respectively.
Optical fibre grating acceleration sensor 2 of the present utility model, fiber grating speed pickup 3, fiber grating displacement sensor 5 are measured respectively these three dynamic indexs of acceleration, speed and displacement of soil sample 7 to be measured.The temperature that fiber-optical grating temperature sensor 4 is measured in test cabinet 8, the temperature while testing.By (FBG) demodulator, the wavelength of light signal is carried out to decipher, can obtain the dynamic response of soil sample 7 to be measured under dynamic load under different temperatures, by certain conversion, can obtain the kinetic parameter of soil sample under different temperatures, avoid according to the defect of wavelength manual calculations physical parameter.
In the present embodiment, processing unit 6 also comprises microcomputer control terminal, and microcomputer control terminal can, according to test result, be drawn the required various datagraphics of test and store.
The sensing process of fiber-optic grating sensor (Fiber Grating Sensor) is, by extraneous physical parameter, the modulation of optical fiber Bragg (Bragg) wavelength is obtained to heat transfer agent, is a kind of wavelength-modulated type Fibre Optical Sensor.Optical fibre grating acceleration sensor 2 of the present utility model, fiber grating speed pickup 3, fiber grating displacement sensor 5 and fiber-optical grating temperature sensor 4 are all prior aries, and its sensing principle is not launched to repeat at this.(FBG) demodulator carries out high precision demodulation to fiber grating Bragg wavelength, and its method is also prior art, at this, also repeats no more.
The moving three axle parameter measurement systems of temperature control that the utility model provides are the improvement to measurement equipment in moving triaxial tester.Test cabinet 8 in this measurement system can be used as the pressure chamber in whole moving triaxial tester.In practical application, moving triaxial tester also comprises excitational equipment etc., consolidation pressure, dynamic stress etc. is provided to soil sample to be measured.Because excitational equipment is existing equipment, at this, do not launch to repeat yet.
In sum, the moving three axle parameter measurement systems of temperature control that the utility model provides are converted into the displacement of the temperature of test cabinet and soil sample to be measured, speed and acceleration the wavelength variations of light signal, parsing by (FBG) demodulator to wavelength, thus each physical quantity to be measured obtained.Fiber-optic grating sensor is according to the variation of optic fiber grating wavelength, to obtain the physical quantity of soil sample to be measured, be not subject to the impact of temperature, avoid the impact of temperature variation on the performance of sensor own, overcome the defect that existing sensor can not obtain soil sample kinetic parameter under high temperature and low-temperature condition.Each sensor is integrated into sensor fibre and is connected to processing unit, due to its transmission be light signal, be therefore subject to the impact of temperature and electromagnetic interference (EMI) smaller, loss is little, and there is good insulativity and corrosion resistance, can effectively improve precision and the reliability of test data.The operating temperature range of this measurement system is-40 ℃ ~ 300 ℃, can meet the requirement that moving three axles of temperature control measure, for the kinetic parameter of Accurate Measurement soil sample provides strong technical guarantee.
Although the utility model is disclosed as above by preferred embodiment; yet not in order to limit the utility model; anyly know this skill person; within not departing from spirit and scope of the present utility model; can do a little change and retouching, therefore protection domain of the present utility model is when being as the criterion depending on claims scope required for protection.
Claims (2)
1. the moving three axle parameter measurement systems of temperature control, for measuring the kinetic parameter of soil sample to be measured under different temperatures, is characterized in that, the moving three axle parameter measurement systems of described temperature control comprise:
Test cabinet, described soil sample to be measured is arranged in described test cabinet;
Optical fibre grating acceleration sensor, is arranged at the top of described soil sample to be measured;
Fiber grating speed pickup, is arranged at the top of described soil sample to be measured;
Fiber grating displacement sensor, is arranged at the top of described soil sample to be measured;
Fiber-optical grating temperature sensor, is arranged in described test cabinet;
Sensor fibre, connects described optical fibre grating acceleration sensor, fiber grating speed pickup, fiber grating displacement sensor and fiber-optical grating temperature sensor;
Processing unit, comprises (FBG) demodulator, and described optical fibre grating acceleration sensor, fiber grating speed pickup, fiber grating displacement sensor and fiber-optical grating temperature sensor are electrically connected described (FBG) demodulator by sensor fibre respectively.
2. the moving three axle parameter measurement systems of temperature control according to claim 1, is characterized in that, described processing unit also comprises microcomputer control terminal, is electrically connected described (FBG) demodulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320537294.2U CN203479647U (en) | 2013-08-30 | 2013-08-30 | Temperature-control dynamic triaxial parameter measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320537294.2U CN203479647U (en) | 2013-08-30 | 2013-08-30 | Temperature-control dynamic triaxial parameter measurement system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203479647U true CN203479647U (en) | 2014-03-12 |
Family
ID=50227959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320537294.2U Expired - Fee Related CN203479647U (en) | 2013-08-30 | 2013-08-30 | Temperature-control dynamic triaxial parameter measurement system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203479647U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596852A (en) * | 2014-11-25 | 2015-05-06 | 宁波大学 | Rock-soil body temperature-control dynamic characteristic test system and test method |
| CN109490224A (en) * | 2018-11-30 | 2019-03-19 | 中国民航大学 | Concrete pavement slab non-destructive testing device and method based on FBG technology |
-
2013
- 2013-08-30 CN CN201320537294.2U patent/CN203479647U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596852A (en) * | 2014-11-25 | 2015-05-06 | 宁波大学 | Rock-soil body temperature-control dynamic characteristic test system and test method |
| CN104596852B (en) * | 2014-11-25 | 2017-03-01 | 宁波大学 | A kind of Rock And Soil temperature control Dynamic Characteristics Test method |
| CN109490224A (en) * | 2018-11-30 | 2019-03-19 | 中国民航大学 | Concrete pavement slab non-destructive testing device and method based on FBG technology |
| CN109490224B (en) * | 2018-11-30 | 2021-03-02 | 中国民航大学 | Concrete pavement slab nondestructive testing device and method based on FBG technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107271090B (en) | A kind of aircraft wing moment of flexure method of real-time based on fiber grating | |
| CN201331395Y (en) | Fibre grating temperature compensation transducer | |
| CN108168728A (en) | Non-equilibrium polarization maintaining optical fibre dual interferometer temperature strain simultaneous measuring apparatus and method | |
| CN203287311U (en) | Double-cone fine-core single mode fiber based transmission-type optical fiber humidity sensor | |
| CN102322894B (en) | Allfiber type long period fiber grating solution multi-parameter sensing system | |
| CN107894245A (en) | A kind of polarization maintaining optical fibre interferometer strained with temperature simultaneously measuring | |
| CN104864979A (en) | Correction method of errors measured by distributed raman optical fiber temperature measuring system | |
| CN106525096A (en) | Brillouin distributed optical fiber sensor and method of reducing gain spectrum line width | |
| CN205655942U (en) | Meet an emergency and optical fiber sensor of temperature simultaneous measurement | |
| CN201637666U (en) | Dynamic measuring instrument of solution concentration | |
| CN103033285A (en) | Simultaneous measurement method of temperature and strain of laid photoelectric composite cable | |
| CN203479647U (en) | Temperature-control dynamic triaxial parameter measurement system | |
| CN203465450U (en) | Strain and temperature dual-parameter optical cable | |
| CN111609809A (en) | Optical fiber high-temperature strain measurement sensor based on strain sensitization structure | |
| CN204359817U (en) | Based on two optical fiber Bragg raster high frequency acceleration transducer | |
| CN102680138B (en) | Double-direction four-channel coupled distribution-type optical-fiber Raman temperature measuring system | |
| CN103217454A (en) | Fiber bragg grating measurement system and method for cylindrical structure thermal diffusivity | |
| CN205912061U (en) | Optical fiber fault detecting system | |
| CN103549941B (en) | AWG (arrayed waveguide grating) wavelength demodulation system with temperature compensation function, heartbeat detection device and application | |
| CN205719020U (en) | The polarization maintaining optical fibre sensor that a kind of temperature is measured with strain simultaneously | |
| CN208297333U (en) | A kind of quasi-distributed system and sensing device measuring soil moisture content | |
| Cui et al. | Measurement of aircraft wing deformation using fiber Bragg gratings | |
| CN207163414U (en) | The embed-type fiber-optic grating sensor of concrete | |
| CN100543498C (en) | Tunnel tunnel face front exploring water inductor | |
| Zheng et al. | Investigation of a spring-shaped fiber modulation based on bending loss for detecting linear displacement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20160830 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |