CN203148780U - Soil consolidation and shear test data acquisition system based on LabView - Google Patents

Soil consolidation and shear test data acquisition system based on LabView Download PDF

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Publication number
CN203148780U
CN203148780U CN 201320193773 CN201320193773U CN203148780U CN 203148780 U CN203148780 U CN 203148780U CN 201320193773 CN201320193773 CN 201320193773 CN 201320193773 U CN201320193773 U CN 201320193773U CN 203148780 U CN203148780 U CN 203148780U
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China
Prior art keywords
data acquisition
labview
acquisition system
shear
test data
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Expired - Fee Related
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CN 201320193773
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Chinese (zh)
Inventor
张华�
高抗
胡文龙
曹金露
李茂�
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China Three Gorges University CTGU
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China Three Gorges University CTGU
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Priority to CN 201320193773 priority Critical patent/CN203148780U/en
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Abstract

The utility model discloses a soil consolidation and shear test data acquisition system based on Labview. The soil consolidation and shear test data acquisition system based on Labview comprises a triaxial apparatus, a three-speed motor equal-strain direct shear apparatus and a high-pressure consolidation apparatus, wherein an axial force sensor and a first displacement sensor are arranged on the triaxial apparatus; a second displacement sensor is arranged on the three-speed motor equal-strain direct shear apparatus; a third displacement sensor is arranged on the high-pressure consolidation apparatus; the axial force sensor, the first displacement sensor, the second displacement sensor and the third displacement sensor are connected with a PC (Personal Computer) by a cDAQ (Q Data Acquisition Q) data acquisition system; and a virtual control interface programmed by the LabView is arranged on the PC. The soil consolidation and shear test data acquisition system based on the LabView can be used for improving the existing soil mechanics and foundation test equipment, so that the test system can be used for automatically and accurately reading and recording displacement deformation at different moments of a soil sample which bears the corresponding load according to test requirements, and a corresponding relationship graph can be automatically drawn out according to the specification requirements.

Description

Native fixed and shear test data acquisition system based on LabView
Technical field
A kind of native fixed and shear test data acquisition system based on LabView of the utility model relates to the Geotechnical Engineering field.
Background technology
The direct shear test of the triaxial shear test of soil, soil and soil solidifying test all belong to the conventional physical property test of soil mechanics, its objective is be used to the basic mechanics index of physics that obtains the soil body.Wherein Tu triaxial shear test is that soil sample is placed in the pressure vessel of triaxial apparatus, by be recorded in control when applying in the environment of ambient stress soil sample under the drainage condition and being subjected to different big or small shear stress detrusion determine the shear strength of soils parameter.The direct shear test of soil is that the soil sample that will prepare is positioned in the direct shear apparatus container, and the shear strength of soils parameter is determined in detrusion when being subjected to different big or small shear stress by the record soil sample.The soil solidifying test is that the soil sample that will prepare is placed in the consolidometer, is out of shape and the time under the lateral confinement condition by the record soil sample---the relation of pressure is determined native constrictive height.
At present, above-mentioned test mainly is to utilize the testing equipment on basis or complete commercial test system to realize.In the process that the testing equipment that uses the basis is tested, need according to different testing requirementss behind imposed load by corresponding time interval record deformation state, even the deformation values when in some tests, also needing to record the long-time back of imposed load soil sample and stablizing.Make that like this collection of test figure is complicated with record in the process of the test, thereby and the process of the test longer duration reduced the efficient of test; Because artificial reading error is bigger, often also caused the inaccurate of test findings simultaneously.If select to use complete commercial test system, then can increase the cost of test greatly.
Summary of the invention
The complexity of data acquisition-and-recording and inaccurate in the process of the test does not increase too many input simultaneously again.The utility model provides a kind of native fixed and shear test data acquisition system based on LabView, existing soil mechanics basic test equipment is improved, make pilot system to read and to record soil sample automatically and accurately according to the test demand and bearing different displacement deformation amounts constantly under the corresponding load, and can draw out the corresponding collection of illustrative plates that concerns automatically according to code requirement.
Above-mentioned purpose of the present utility model is to realize by such technical scheme: based on the native fixed and shear test data acquisition system of LabView, comprise: triaxial apparatus, three speed strain direct shear apparatus such as electronic, high pressure consolidometer, described triaxial apparatus are provided with axial force sensor, first displacement transducer; The electronic strain direct shear apparatus that waits of described three speed is provided with second displacement transducer; Described high pressure consolidometer is provided with the triple motion sensor; Described axial force sensor, first displacement transducer, second displacement transducer, triple motion sensor connect PC by the cDAQ data acquisition system (DAS), and described PC is provided with the virtual controlling interface.
Described triaxial apparatus comprises the GDS control pressurer system, and the GDS control pressurer system connects pressure source.
Described GDS control pressurer system comprises: GDS confined pressure system, GDS counter-pressure system.
Described axial force sensor is installed on the axle power guide rod of triaxial apparatus.
Described first displacement transducer is two, is installed in the loam cake two ends, pressure chamber of triaxial apparatus respectively.
A kind of native fixed and shear test data acquisition system based on LabView of the utility model, simple in structure, cost of manufacture is low, and data acquisition is precisely quick, and easy to use.
In correlation test, the utility model system can replace the hand labor of long-time frequent observational record data in the traditional experiment by the time interval automatic data collection of setting.
The utility model system has given full play to the sensor image data accurately fast and the characteristic of computer processing data precise and high efficiency, can gather real-time online express-analysis simultaneously fast to data handles, accomplish robotization, accuracy, the high speed of data acquisition and processing, increase work efficiency widely.
Description of drawings
Fig. 1 is the utility model system architecture connection diagram.
Fig. 2 is the triaxial apparatus structural representation of the utility model system.
Fig. 3 is the electronic strain direct shear apparatus structural representations that wait of three speed of the utility model system.
Fig. 4 is the structural representation of the high pressure consolidometer of the utility model system.
Embodiment
As Fig. 1 ~ shown in Figure 4, the native fixed and shear test data acquisition system based on LabView comprises: strain direct shear apparatuses 2 such as triaxial apparatus 1, three speed are electronic, high pressure consolidometer 3, described triaxial apparatus 1 are provided with axial force sensor 1.7, first displacement transducer 1.2.The electronic strain direct shear apparatus 2 that waits of described three speed is provided with second displacement transducer 2.7.Described high pressure consolidometer 3 is provided with triple motion sensor 3.4.Described axial force sensor 1.7, first displacement transducer 1.2, second displacement transducer, triple motion sensor 3.4 connect PC 5 by cDAQ data acquisition system (DAS) 4, and described PC 5 is provided with the virtual controlling interface of LabView establishment.
The utility model triaxial apparatus 1 adopts axial force sensor 1.7, first displacement transducer 1.2 to replace dynamometer dial gauge in the axial pressure equipment and the axial displacement dial gauge in axial deformation and the cubic deformation measurement system respectively.And thereby combined with virtual technical device establishment data acquisition control system has improved test efficiency greatly.As shown in Figure 2, triaxial apparatus 1 comprises: axial pressure equipment 1.1, the first displacement transducers 1.2, pressure chamber's loam cake 1.3, organic glass bucket 1.4, GDS confined pressure system 1.5, motor 1.6, axial force sensor 1.7, axle power guide rod 1.8, sample cap 1.9, permeable stone 1.10, bungee 1.11, draining valve 1.12, GDS counter-pressure system 1.13, measuring pore water pressure system 1.14.Axial force sensor 1.7 is installed on the power guide rod 1.8 to replace former dynamometry dial gauge.Two first displacement transducers 1.2 are installed in pressure chamber's loam cake 1.3 two ends respectively, substitute former axial displacement dial gauge to measure shear displacemant (sensor accuracy is 0.1%).First displacement transducer 1.2 passes to cDAQ data acquisition system (DAS) 4 with the change in displacement of perception with the form of voltage signal.PC 5 reads signal collected, by the virtual instrument control interface of LabVIEW establishment voltage signal is translated into the shift value of corresponding size, and will finally store with the form of document or chart through the data of routine processes.Ambient pressure is by supplying with the pressure source 7 that the pressure chamber directly links to each other simultaneously.The utility model system adopts the gear case of motor 1.6 drive multi-change speeds, and makes the bottom-up movement in pressure chamber by kinematic train, thereby makes sample bear axle pressure.
The calibration coefficient of sensor can freely be filled on coefficient of combination hurdle on the virtual controlling interface of LabView establishment, be convenient to regularly displacement transducer be checked and demarcate again after proceed use.Corresponding confined pressure value, back-pressure value, hole pressure value can be imported according to the test demand in the test figure hurdle, accurately provide ambient pressure by the GDS pressure controller according to set value then after clicking the operation key.Time arrange the hurdle manually setting data read interlude, cDAQ data acquisition system (DAS) 4 reads and records respective value in the instrument back that brings into operation automatically according to the time interval that sets.In the process of the test, axial force sensor 1.7 and first displacement transducer 1.2 are measured axle pressure and axial displacement information respectively by the time interval of setting, and the information via computer programs process can be drawn stress-strain curve diagram automatically on the control interface.
The utility model three speed is electronic wait strain direct shear apparatus 2 by: shear box, vertical pressurized equipment, shear gearing, dynamometer and five parts of displacement measurement system and form.In technical scheme, adopt three second displacement transducers 2.7, replace the level of shear displacement dial gauge in perpendicular displacement dial gauge in the vertical pressurized equipment, dynamometer dial gauge, the displacement examining system respectively, thereby and the combined with virtual technical device create data acquisition control system and improved test efficiency greatly.As shown in Figure 3, the electronic strain direct shear apparatus 2 that waits of three speed comprises: support 2.1, base 2.2; Distance rod 2.3, permeable stone 2.4, last box 2.5, following box 2.6, the second displacement transducers 2.7, sample cap 2.8; Filter paper 2.9, steel loop 2.10.With 2 second displacement transducers 2.7, the former perpendicular displacement dial gauge of displacement, former dynamometry dial gauge, be respectively applied to be determined at the deflection under the corresponding load, and at 1 second displacement transducer 2.7 of down cut box one end use, substitute former level of shear displacement dial gauge and directly measure the horizontal shift (sensor accuracy is 0.1%) of box down.Second displacement transducer passes to cDAQ data acquisition system (DAS) 4 with the change in displacement of perception with the form of voltage signal.PC 5 reads signal collected, by the virtual instrument control interface of LabVIEW establishment voltage signal is translated into the shift value of corresponding size, and will finally store with the form of document or chart through the data of routine processes.
The calibration coefficient of sensor can freely be filled on coefficient of combination hurdle on the virtual controlling interface of LabView establishment, be convenient to regularly the displacement transducer coefficient be checked and demarcate again after proceed use.The sample information hurdle can be imported test and calculate required sample information.Artificial shelves or the automatic record shelves set can be selected in the data acquisition modes hurdle.Wherein artificial setting shelves are the time according to the artificial setting data acquisition interval of testing requirements, and data acquisition system (DAS) reads and record respective value automatically according to the time interval that sets after instrument brings into operation; Automatically thereby the record shelves are to read data according to default time logarithmic form at interval to have satisfied the needs that most of distortion in some test all concentrates on the characteristics in very little a period of time in early stage.In the consolidation process of test, apply pressure at right angle, the every 1h of perpendicular displacement sensor surveys the consolidation settlement displacement once, and gained information via computer programs process generates consolidation settlement variation diagram in time in the relevant position automatically on the control interface.In the shear history of test, sensor is pressed setting means and is gathered soil sample 8 deflections, controls the graph of a relation that can draw out shearing force and shear displacemant on the interface automatically simultaneously.
The utility model high pressure consolidometer 3 is made up of: consolidation container, pressurized equipment, three parts of deformation measurement equipment.Adopt triple motion sensor 3.4 to replace axial displacement dial gauge in the shaft distortion measurement equipments, thereby and the combined with virtual technical device create data acquisition control system and improved test efficiency greatly.High pressure consolidometer 3 comprises: support 3.1; Permeable stone 3.2, tank 3.3, the triple motion sensors 3.4, force-transmitting block 3.5, pressurization loam cake 3.6, filter paper 3.7, cutting ring 3.8, lead ring 3.9, retaining ring 3.10.Replace former axial displacement dial gauge for the deflection (sensor accuracy is 0.1%) that is determined under the corresponding load with triple motion sensor 3.4.Triple motion sensor 3.4 passes to cDAQ data acquisition system (DAS) 4 with the change in displacement of perception with the form of voltage signal.PC 5 reads signal collected, by the virtual instrument control interface of LabVIEW establishment voltage signal is translated into the shift value of corresponding size, and will finally store with the form of document or chart through the data of routine processes.
The calibration coefficient of triple motion sensor 3.4 can freely be filled on coefficient of combination hurdle on the virtual controlling interface of LabView establishment, be convenient to regularly triple motion sensor 3.4 be checked and demarcate again after proceed use.The sample information hurdle can be imported test and calculate required sample information.The form that reads is automatically adopted in data acquisition, namely in the generation of displacement monitoring automatically after the time interval of artificial setting recording, and produces time and the displacement size of displacement from line item.In the process of the test, pressurization step by step, sensor is pressed setting means and is gathered soil sample 8 deflections, and respective regions is drawn settling amount graph of a relation over time automatically on the control interface simultaneously.

Claims (5)

1. based on the native fixed and shear test data acquisition system of LabView, comprising: triaxial apparatus (1), three speed strain direct shear apparatus (2) such as electronic, high pressure consolidometer (3) is characterized in that,
Described triaxial apparatus (1) is provided with axial force sensor (1.7), first displacement transducer (1.2);
The electronic strain direct shear apparatus (2) that waits of described three speed is provided with second displacement transducer (2.7);
Described high pressure consolidometer (3) is provided with triple motion sensor (3.4);
Described axial force sensor (1.7), first displacement transducer (1.2), second displacement transducer (2.7), triple motion sensor (3.4) connect PC (5) by cDAQ data acquisition system (DAS) (4), and described PC (5) is provided with the virtual controlling interface.
2. according to the described a kind of native fixed and shear test data acquisition system based on LabView of claim 1, it is characterized in that described triaxial apparatus (1) comprises GDS control pressurer system (6), GDS control pressurer system (6) connects pressure source (7).
3. according to the described a kind of native fixed and shear test data acquisition system based on LabView of claim 2, it is characterized in that described GDS control pressurer system (6) comprising: GDS confined pressure system (1.5), GDS counter-pressure system (1.13).
4. according to the described a kind of native fixed and shear test data acquisition system based on LabView of claim 1, it is characterized in that described axial force sensor (1.7) is installed on the axle power guide rod (1.8) of triaxial apparatus (1).
5. according to the described a kind of native fixed and shear test data acquisition system based on LabView of claim 1, it is characterized in that described first displacement transducer (1.2) is two, be installed in pressure chamber's loam cake (1.3) two ends of triaxial apparatus (1) respectively.
CN 201320193773 2013-04-17 2013-04-17 Soil consolidation and shear test data acquisition system based on LabView Expired - Fee Related CN203148780U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320193773 CN203148780U (en) 2013-04-17 2013-04-17 Soil consolidation and shear test data acquisition system based on LabView

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103245560A (en) * 2013-04-17 2013-08-14 三峡大学 Soil consolidation and shear test data acquisition system based on LabView
CN103792335A (en) * 2014-01-07 2014-05-14 陕西理工学院 Consolidometer information calibration system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103245560A (en) * 2013-04-17 2013-08-14 三峡大学 Soil consolidation and shear test data acquisition system based on LabView
CN103792335A (en) * 2014-01-07 2014-05-14 陕西理工学院 Consolidometer information calibration system

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Granted publication date: 20130821

Termination date: 20140417