CN107356469A - A kind of controllable crag test of Vibration system of cohesive force - Google Patents
A kind of controllable crag test of Vibration system of cohesive force Download PDFInfo
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- CN107356469A CN107356469A CN201710593896.2A CN201710593896A CN107356469A CN 107356469 A CN107356469 A CN 107356469A CN 201710593896 A CN201710593896 A CN 201710593896A CN 107356469 A CN107356469 A CN 107356469A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
A kind of controllable crag test of Vibration system of cohesive force, including pedestal, the control cabinet for controlling sucker electromagnet magnetic force and the vibration frequency for detection object, the vibration characteristics detection process device of amplitude data；Described pedestal includes sucker electromagnet, slope board, slope board neck and elevating mechanism；Slope board is installed on the slope board neck, slope board neck one end ground connection, the other end of the slope board neck is arranged on the elevating mechanism for being used for adjusting ramp angles, install to attract the electromagnet of magnetic tested sample the bottom of the slope board neck, the top of the slope board is the initial position for placing magnetic tested sample, the electromagnet is located at immediately below the initial position, and the controlled end of the electromagnet is connected with the control cabinet.The invention provides it is a kind of have good stability, the crag test of Vibration system that cohesive force that precision is higher is controllable.
Description
Technical field
The invention belongs to the slope geological prevention and control field in Geotechnical Engineering, the controllable crag of specifically a kind of cohesive force
Test of Vibration system.
Background technology
In the last few years, with expanding economy and the construction of various engineerings, there is substantial amounts of Artificial Side-slope and close on
The natural side slope of road, residential quarter etc., crag unstable failure phenomenon is more and more, is caused to the people's lives and property irremediable
While loss, the traffic safety such as Ye Gei highways, railway brings hidden trouble.
Influenceed by surrounding enviroment and itself deterioration process, unstability can occur for crag and avalanche.Judge crag stability
Key be the connection status found out between target rock mass and basement rock, the sillar largely slid all exists and basement rock cohesive force
The problem of insufficient.The conventional monitoring means based on displacement can only slide occur after could early warning, thus exist it is ageing partially
The problem of low.The method that other reflection crag stabilitys are introduced in recent research, for example, the vibration such as eigentone is special
Property can reflect the change of rock mass self stability, so as to provide a kind of effective means for crag early warning.Vibrated
During attribute testing, field test is limited by place, and experimental condition is single, and acquired results universality is limited, is not suitable for entering parameter
Row NULL, summarize universal law；It is short with taking and the experiment under laboratory environment is relatively controllable, spend less, repeat
The advantages that property is strong.
The process slid is destroyed in order to simulate crag, generally use external load in laboratory, changes the side such as angle of inclination
Method, but under most of actual conditions, crag is that weakening strength is occurring with the contact surface of basement rock and is occurring under Gravitative Loads broken
It is bad, how more preferable simulation this spontaneous destructive process be controlling test key.Have scholar with frost melt method come
The change procedure of potential slide surface cohesive force is simulated, but the melting process of ice is difficult to control, cohesive force is difficult to quantify measurement, real
The stability and precision tested cannot be guaranteed.
On the other hand, the test method such as additional sensor or application external force can all change crag itself on crag sample
Vibration characteristics, so as to interference measurement results.
The content of the invention
In order to overcome the shortcomings of that less stable, the precision of existing crag vibration characteristics test mode are relatively low, the present invention carries
Supplied it is a kind of have good stability, the crag test of Vibration system that cohesive force that precision is higher is controllable.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of controllable crag test of Vibration system of cohesive force, including pedestal, for controlling sucker electromagnet magnetic force
Control cabinet and vibration frequency for detection object, the vibration characteristics detection process device of amplitude data；
Described pedestal includes sucker electromagnet, slope board, slope board neck and elevating mechanism；On the slope board neck
Slope board is installed, slope board neck one end ground connection, the other end of the slope board neck, which is arranged on, to be used to adjust ramp angle
On the elevating mechanism of degree, the bottom of the slope board neck is installed to attract the electromagnet of magnetic tested sample, the slope
The top of plate is the initial position for placing magnetic tested sample, and the electromagnet is located at immediately below the initial position, institute
The controlled end for stating electromagnet is connected with the control cabinet.
Further, described vibration characteristics detection process device includes three-dimensional laser vialog and data analysis processor；
The measurement range of described three-dimensional laser vialog covers the working face of the slope board；Described data analysis processor and three
Dimension laser vibration measurer is connected, and can receive and analyze and process the data of three-dimensional laser vialog and obtain measuring the vibration frequency of object
Rate, amplitude characteristic value.
Further, described control cabinet includes being used to reach by control electric current size accurately controlling sucker electromagnetism ferromagnetic
The electromagnetic force control unit of power.
The elevating mechanism is jack.Other lifting structures can also be used.
In the present invention, laser doppler vibrometer is employed, laser doppler vibrometer has non-contact, high-precision etc. excellent
Point, it technically can quickly measure the vibration characteristics of Dangerous Rock；Sucker electromagnet can accurately control the size of magnetic force, can
Preferably to simulate and control the cohesive force of potential slide surface.
Beneficial effects of the present invention are mainly manifested in：
1) using the vibration characteristics of contactless metering system measurement sample, ensure to survey in the case where not disturbing sample
Accuracy of measurement.
2) sucked type electromagnet can accurately control the size of magnetic force, can effectively simulate sample on the slope from be stabilized to destroy
Overall process, in the process without external factor influence sample vibration characteristics.
3) can measure various materials, pedestal can adjustment angle on demand, meet various requirement of experiment.
Brief description of the drawings
Fig. 1 is the system principle schematic diagram of the present invention
In Fig. 1,1- data analysis processors；2- three-dimensional laser vialogs；3- slope boards；4- jack；5- slopes board
Groove；6- sucker electromagnet；7- samples；8- magnetic materials；9- control cabinets.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Reference picture 1, a kind of controllable crag test of Vibration system of cohesive force, including the vibration frequency for detection object
The vibration characteristics detection process device of the data such as rate, amplitude；The pedestal of embedded sucker electromagnet；And for controlling sucker electromagnetism
The control cabinet of ferromagnetic power.
As shown in figure 1, described vibration characteristics detection process device, including at three-dimensional laser vialog 2 and data analysis
Manage device 1.Three-dimensional laser vialog 2, using the vibration measurement with laser technology based on doppler principle, the accurate measurement long distance of energy is from thing
The vibration signal of body, including displacement, speed and acceleration information, three-dimensional laser vialog 2, which is placed on tripod, keeps stable, can
To exclude influence of instrument itself vibration to test result；The measurement range of three-dimensional laser vialog 2 covers the slope board
Working face；Data analysis processor 1 is connected with three-dimensional laser vialog 2, can receive the data of three-dimensional laser vialog 2, will
Data are intuitively shown on screen, while data can be analyzed and processed, and obtain measuring vibration frequency, amplitude of object etc.
Characteristic value.
As shown in figure 1, described pedestal, including sucker electromagnet 6, slope board 3, slope board neck 5, jack 4.Sucker
Electromagnet 6 includes core body, coil, cover plate, case.Coil is wrapped on core body, and in case, cover plate is fixedly connected with case
Electromagnet, to coil electricity sucker electromagnet 6 can be made to produce magnetic force, sample 7 can add magnetic material by prefabricated method
Expect 8 or after sample 7 completes in its surface mount magnetic material 8, so sample 7 can be made to inhale on slope board 3；Tiltedly
Ramp 3 can be arranged in slope board neck 5, and its composition material is consistent with the composition material of sample 7, and can be according to different samples
7 materials are changed；Slope board neck 5, it is made of the material of high-strength light, neck can install the slope board 3 of different materials, and
And sucker electromagnet 6 can be installed in its underpart；Jack 4 plays a part of support, can adjust slope inclination angle according to requirement of experiment.
As shown in figure 1, described control cabinet 9, is connected with sucker electromagnet 6 by wire, it can accurately control and be passed through sucker
The size of current of electromagnet 6, and then the size of magnetic force can be accurately controlled in real time.
Before on-test, first according to experiment needs, slope inclination angle is adjusted using jack 4, on sample 7 and slope
Pressure sensor is equably set between plate 3, and energization makes sucker electromagnet 6 produce magnetic force, records now pressure sensor data
Average value, by the way that the magnetic force of electromagnet and the quantitative relationship of cohesive force is calculated.The test removes pressure sensing after terminating
Device.
During on-test, the vibration performance of slope board 3 is measured by the use of three-dimensional laser vialog 2 makes sucker as benchmark, energization
Electromagnet 6 produces magnetic force, and sample 7 is inhaled on slope board 3, and the vibration signal of sample 7 is measured with three-dimensional laser vialog 2.Drop
Low pass enters the electric current of sucker electromagnet 6, is gradually reduced magnetic force, until sample slides.Experiment can full simulation go out sample 7 from steady
Surely the overall process of sliding failure is arrived, by the analyzing and processing of later data, the pass of sample vibration characteristics and stability can be obtained
System.
In order to preferably explain the principle and practical application of the present invention, an application example is introduced.Certain experiment is using flower
The sample 7 of hilllock rock material, slope inclination angle are 60 °.Friction coefficient μ=0.57 of sample 7 is measured according to experiment, is surveyed with electronic balance
Obtain 7 heavy 2.96kg of sample.Sample 7 is placed on slope board 3, understands that sample 7 and the frictional force on slope are f by calculating1=
60 °=8.26N of μ Gcos, component of the sample 7 along slope are f2=G × sin60 °=25.11N, f2＞ f1The meeting of sample 7
Slided along slope.Need to add a magnetic force f3So that sample 7 keeps stable state,
The magnetic force that need to add during test sample remained stable needs to refer to data that pressure sensor measures to set.Controlled and inhaled by control cabinet 9
Disk electromagnet 6 produces 50N magnetic force, now test sample remained stable state, hereafter reduces magnetic force with 1N/min speed, and simulation is slided
The process that the cohesive force in shifting face gradually weakens over time, while continuously measure with three-dimensional laser vialog 2 vibration of sample 7
Characteristic, until sample slides, frequency and amplitude Precursory Characters jumpy can be obtained before landing.What analysis measured
The data such as vibration frequency and amplitude, obtain the relation of vibration characteristics and stability.
Claims (4)
- A kind of 1. controllable crag test of Vibration system of cohesive force, it is characterised in that：The pilot system includes pedestal, used In the control cabinet of control sucker electromagnet magnetic force and vibration frequency for detection object, the detection of the vibration characteristics of amplitude data Processing unit；Described pedestal includes sucker electromagnet, slope board, slope board neck and elevating mechanism；Installed on the slope board neck Slope board, slope board neck one end ground connection, the other end of the slope board neck, which is arranged on, to be used to adjust ramp angles On elevating mechanism, the bottom of the slope board neck is installed to attract the electromagnet of magnetic tested sample, the slope board Top is the initial position for placing magnetic tested sample, and the electromagnet is located at immediately below the initial position, the electricity The controlled end of magnet is connected with the control cabinet.
- 2. the controllable crag test of Vibration system of cohesive force as claimed in claim 1, it is characterised in that：Described vibration Characteristics Detection processing unit includes three-dimensional laser vialog and data analysis processor；The measurement of described three-dimensional laser vialog Scope covers the working face of the slope board；Described data analysis processor is connected with three-dimensional laser vialog, can receive and Analyze and process the data of three-dimensional laser vialog and obtain measuring vibration frequency, the amplitude characteristic value of object.
- 3. the controllable crag test of Vibration system of cohesive force as claimed in claim 1 or 2, it is characterised in that：Described Control cabinet includes being used for the electromagnetic force control unit for reaching accurate control sucker electromagnet magnetic force by control electric current size.
- 4. the controllable crag test of Vibration system of cohesive force as claimed in claim 1 or 2, it is characterised in that：The liter Descending mechanism is jack.
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| CN201710593896.2A CN107356469A (en) | 2017-07-20 | 2017-07-20 | A kind of controllable crag test of Vibration system of cohesive force |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593890A (en) * | 2018-05-30 | 2018-09-28 | 西安科技大学 | A kind of visualization assemblage block physical simulation experimental provision of seam mining |
| CN110095807A (en) * | 2019-04-08 | 2019-08-06 | 三峡大学 | A kind of simulation projectile type landslide experimental provision and method |
| CN111637960A (en) * | 2020-04-26 | 2020-09-08 | 河海大学 | Vibration measuring system for eliminating vibration influence of base point of laser vibration meter |
| CN111665017A (en) * | 2020-06-12 | 2020-09-15 | 河海大学 | Landslide surge model test device and landslide surge test method |
| CN114543970A (en) * | 2022-02-22 | 2022-05-27 | 西安航天动力试验技术研究所 | Rocket engine non-contact vibration test system and calibration method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593890A (en) * | 2018-05-30 | 2018-09-28 | 西安科技大学 | A kind of visualization assemblage block physical simulation experimental provision of seam mining |
| CN110095807A (en) * | 2019-04-08 | 2019-08-06 | 三峡大学 | A kind of simulation projectile type landslide experimental provision and method |
| CN111637960A (en) * | 2020-04-26 | 2020-09-08 | 河海大学 | Vibration measuring system for eliminating vibration influence of base point of laser vibration meter |
| CN111637960B (en) * | 2020-04-26 | 2021-08-27 | 河海大学 | Vibration measuring system for eliminating vibration influence of base point of laser vibration meter |
| CN111665017A (en) * | 2020-06-12 | 2020-09-15 | 河海大学 | Landslide surge model test device and landslide surge test method |
| CN111665017B (en) * | 2020-06-12 | 2022-05-10 | 河海大学 | Landslide surge model test device and landslide surge test method |
| CN114543970A (en) * | 2022-02-22 | 2022-05-27 | 西安航天动力试验技术研究所 | Rocket engine non-contact vibration test system and calibration method thereof |
| CN114543970B (en) * | 2022-02-22 | 2024-01-12 | 西安航天动力试验技术研究所 | Rocket engine non-contact vibration test system and calibration method thereof |
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