CN108333196A - A kind of ground water sensitivity analysis system and its control method - Google Patents
A kind of ground water sensitivity analysis system and its control method Download PDFInfo
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- CN108333196A CN108333196A CN201810081442.1A CN201810081442A CN108333196A CN 108333196 A CN108333196 A CN 108333196A CN 201810081442 A CN201810081442 A CN 201810081442A CN 108333196 A CN108333196 A CN 108333196A
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- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
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Abstract
This application discloses a kind of ground water sensitivity analysis systems and its control method, analysis system to include：Closed container, Inner Constitution which is provided with humidity sensor to accommodate the confined space of sample；Clamping piece, the inside the closed container can be set in a manner of rotation in an axial direction；Humidity controller is connect with the closed container by pipeline sealing, to control the humidity in the closed container；CT scan device includes to carry out the radiographic source and detector of CT scan to the sample；Data acquisition control system is connect with the humidity sensor, humidity controller, CT scan device；The data acquisition control system is monitored by the humidity sensor and humidity controller and adjusts the humidity in the closed container, and the rotation of the clamping piece is adjusted during CT scan, the automatic cycle control and in-situ three-dimensional CT scan to realize relative humidity during sample drying and watering cycle measure.
Description
Technical field
This disclosure relates to laboratory experiment measuring instrument technical field, and in particular to a kind of ground water sensitivity analysis system and
Its control method.
Background technology
Rock（Soil）Water sensitivity be one of important issue of geotechnical engineering, influence of the moisture to geotechnical engineering medium is
Important, it is common for when the moisture content in Rock And Soil changes, physico-mechanical properties often occur aobvious therewith
Variation is write, the change dramatically of Rock And Soil intensity and volume may be caused, cause reservoir rock permeability to change, seriously affect
The safety and stability of engineering, therefore the water sensitivity for studying geotechnical engineering medium is of great significance.
When the water sensitivity to geotechnical engineering medium is analyzed, traditional water sensitivity is tested from macroscopic perspective
Influence of the moisture to characteristics such as probe intensity, volume, permeabilities is studied, i.e., saturated salt solution control is used by wetting-drying test
Relative humidity processed.According to thermodynamic principles, a certain range of relative humidity of the corresponding ullage of saturated salt solution is opposite
Stable, in the case where the factors such as temperature, saturation degree are constant, the relative humidity of ullage also remains unchanged, and different
Saturated salt solution, because of the difference of chemical nature, the stationary value of the relative humidity of corresponding ullage is also different, in this way
Different types of salting liquid can be chosen, constantly changes the Conservation environment of sample, the drying and watering cycle of certain effect may be implemented.
But this traditional wetting-drying test often has the disadvantages that：
It is poor between the relative humidity of various salts control although 1, saturated salt solution can control stable relative humidity
It is not larger, therefore the damp condition tested is discontinuous, is rendered as jumping characteristic variation；Therefore traditional wetting-drying test without
Method accomplishes the precise controlling to humidity environment, can not also obtain correlated performance of the test specimen under different continuous damp conditions.
2, during wetting-drying test, different relative humidity, needs frequently to replace salting liquid in order to obtain, and
This test method will certainly influence sample during operation, and the disturbance to sample is caused, to influence to test
As a result accuracy.
3, part unsaturation geotechnical engineering medium is especially big to the sensibility of moisture, the relative humidity of the environment residing for sample
Change quick dehydration or the water suction that can all cause in the sample short time, can not ensure that its moisture content state carries out survey in situ
Examination can not accurately ensure the damp condition of country rock reset condition, and these influence the microstructure for research sample variation
Mechanism is extremely important, therefore traditional wetting-drying test cannot be satisfied the corresponding demand to microstructure mechanism study.
Invention content
In view of drawbacks described above in the prior art or deficiency, it is intended to provide a kind of ground water sensitivity analytical plan.
In a first aspect, the embodiment of the present application provides a kind of ground water sensitivity analysis system, including：
Closed container, Inner Constitution which is provided with humidity sensor to accommodate the confined space of sample；
Clamping piece, the inside the closed container can be set in a manner of rotation in an axial direction；
Humidity controller is connect with the closed container by pipeline sealing, to control the humidity in the closed container；
CT scan device includes to carry out the radiographic source and detector of CT scan to the sample；
Data acquisition control system is connect with the humidity sensor, humidity controller, CT scan device；
The data acquisition control system is monitored by the humidity sensor and humidity controller and adjusts the closed container
In humidity, and adjust during CT scan the rotation of the clamping piece, it is opposite during sample drying and watering cycle to realize
The automatic cycle control of humidity and in-situ three-dimensional CT scan measure.
The radiographic source and detector are arranged in a manner of it can be moved towards or away from the closed container described closed
The both sides of container, data acquisition control system control adjust the radiographic source and detector and the closed container away from
From preferable shooting effect can be reached.
The system also includes sliding rail, the pedestal of the pedestal of the radiographic source and the detector is with can be along the sliding rail axis
It is located on the sliding rail to the mode of movement.May be implemented to control respectively in this way radiographic source pedestal, detector base with
0.01mm/s ~ 10mm/s rates move on slideway, and displacement is accurate to 0.01mm, can accurately adjust between three it is opposite away from
From raising shooting effect.
Further include temperature sensor and temperature controller, the temperature controller and the humidity controller are integrated machine.
The stabilization that may insure test process, makes whole system be in isoperibol.
The end of the clamping piece and connecting shaft connect, the connecting shaft can rotation in an axial direction, the system also includes add
Carrying platform pedestal, the weighted platform pedestal is interior to be equipped with motor, and the connecting shaft passes through the bottom of the closed container, another
The motor axis connection of one end and the motor, can in simple structure form realize clamping piece rotation, motor is set
In in weighted platform pedestal, space availability ratio is high.
The connecting shaft passes through the opening of the closed container to be equipped with to the closed sealing ring of holding container, ensures close
Close the seal of container.
Support tube is equipped between the closed container and the weighted platform, the support tube is set to the outer of the connecting shaft
Side is equipped with spacing between the outer wall of the connecting shaft and the inner wall of the supporting rod.Form realizes closed appearance in simple structure
The positioning and support of device, space structure design are reasonable.
The pipeline for connecting the humidity controller and closed container includes air inlet pipeline and outlet pipe, passes through control
Flowing to automatically control the relative humidity in closed container for different humidity air, carries out sample different degrees of saturation.
The system also includes preventing the babinet of ray radiation, the closed container and CT scan device to be placed in institute
The inside for stating babinet can play the effect of protection instrument well, improve instrument while protecting operating personnel from radiation
The service life of device.
A kind of control method of three dimensional CT ground water sensitivity analysis system, includes the following steps：
Receive the humidity data of closed container, the humidity differences of the humidity data and the first setting humidity；
According to the humidity differences, the air input and/or discharge rate with setting humidity are adjusted, until the humidity differences
Less than allowing humidity differences；
Obtain the actual displayed range of scan vision of the sample in CT scan device；
According to the range difference of the actual displayed range and target indication range, adjust in the scanning means CT radiographic sources and
Detector is at a distance from the sample；
It controls the CT devices to start to scan, in scanning process, controls the rotation of connecting shaft；
After the end of scan, the humidity for adjusting the closed container reaches the second setting humidity, repeats the scanning step of CT devices.
Ground water sensitivity analytical plan provided by the embodiments of the present application, is connected to by humidity controller with closed container
Design realizes that unsaturation is dry and moistens the control of the automatic cycle of process relative humidity, wetting-drying test may be implemented not
With the precise controlling under continuous damp condition and avoid during testing to the disturbance of test specimen to improve the accurate of experimental result
Property；Pass through the synergistic effect of CT scan device, clamping piece, connecting shaft and humidity controller, it is possible to reduce the influence of human factor,
And then the microstructure under protolith initial humidity state is obtained, provide possibility for accurate research protolith microstructure mechanism.It is closed
The synergistic effect of container, humidity controller, CT scan device and data acquisition control system realizes sample drying and watering cycle jointly
The automatic cycle control of relative humidity and in-situ three-dimensional CT scan measure in the process.Control method provided by the embodiments of the present application,
It may be implemented to automatically control humidity environment, the adverse effect for avoiding artificial disturbance from bringing test specimen；And it may be implemented more
Good CT shooting effects provide possibility for microstructure mechanism of the research country rock under protolith state.
Description of the drawings
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon：
Fig. 1 shows the ground water sensitivity analysis system structural schematic diagram in the embodiment of the present application 1；
Fig. 2 shows the ground water sensitivity analysis system weighted platform schematic elevation views in the embodiment of the present application 1；
Fig. 3 shows the line A-A sectional view along Fig. 2；
Fig. 4 shows the slideway structure vertical view in the embodiment of the present application 1；
Fig. 5 shows the B-B sections left view along Fig. 4；
Wherein：1- weighted platforms, 2- closed containers, 3- humidity temperature pickups, 4- specimen holders, the vertical connecting shafts of 5-, 6-
Supporting steel pipe, 7- ventilation pipes, 8- weighted platforms pedestal, 9- electric rotatings motivation, 10-CT dual-energy x-rays source line, 11- radiographic sources
Support shaft, 12- radiographic sources pedestal, 13- high-resolution non-crystalline silicons area array detector, 14- detectors support shaft, 15- detectors
Pedestal, 16- slideways, 17- slideways support base, 18- stepping motors, 19- spirals connecting shaft, 20- humidity controllers, 21- connect
Take over road, 22- radiation protection systems babinet, 23- data acquisition control systems.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention carries out clear, complete description.Obviously, described embodiment is
A part of the invention is instead of all the embodiments.For ease of description, it is illustrated only in attached drawing and invents relevant part.
It should be noted that in the absence of conflict, the embodiment of the present invention for usually describing and showing in this figure
Component can arrange and design with a variety of different configurations.It is understood that specific embodiment described herein is only
It is only used for explaining related invention, rather than the restriction to the invention.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, belong to " setting ",
" connection " should broadly understood, for example, it may be being fixedly connected, may be a detachable connection, or integrated connection；For this
For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Embodiment one
As mentioned in the background, traditional water sensitivity test can only be studied from macroscopic perspective moisture to probe intensity,
The influence of the characteristics such as volume, permeability, normal principal states using dry or saturation state as research, can not accurately control with
Reflect the saturation state of sample, the result information of acquisition is limited, therefore can not accurately reflect that moisture influences Rock-soil Mass Structure
Change procedure.And there is drying and watering cycle phenomenon in the factors such as Rock And Soil Chang Yinwei rainfalls, temperature, seasonal variations in nature, rock
Also with the appearance of drying and watering cycle phenomenon circulation change occurs for the moisture content of geotechnological Cheng Jiezhi, and Rock And Soil is also often unsaturation shape
State.Since influence of the variation to geotechnical engineering medium of moisture content is very big, the ground work under dry or saturation state is only studied
The material property of Cheng Jiezhi cannot meet our growing requirement of engineering, and from the perspective of scientific research, understand the palm
It is also necessary to the microcosmic effect mechanism of geotechnical engineering medium influence to hold moisture, is also built with directiveness to engineering construction
View, therefore the variation for studying water sensitivity and microstructure of the geotechnical engineering medium during drying and watering cycle has important meaning
Justice.And currently without the water sensitivity and microstructure change of the geotechnical engineering medium that can preferably study under unsaturated state
Equipment.
On the other hand, from the volume change of porous media and microcosmic hole during microstructure angle research drying and watering cycle
Gap, crackle variation help to understand the microcosmic effect mechanism of geotechnical engineering medium water sensitivity.During studying drying and watering cycle
When water-cut variation is to the Effects on Microstructure of sample, often to test under different relative humidity states（Moisture content state）Sample
Volume change, pore structure variation, microstructure change etc..
Traditional wetting-drying test is often in carrying out corresponding test process, it is difficult to ensure in experimentation sample not by
Other disturbances, the mainly artificial operation to sample change position, loading and unloading sample of sample etc..In other words, this test
It is difficult to the single variation of control（Relative humidity）, can not accomplish that in-situ test tracks, especially to measure drying and watering cycle
The microstructure change of process in which materials is more susceptible to the influence of human factor, causes test result not exclusively reliable.It wants
Think accurately and effectively to measure change mechanism of geotechnical engineering medium during drying and watering cycle, need research it is a kind of efficiently, it is reliable,
It is easily operated, and it is corresponding to solve the problems, such as to measure accurate system and method.
A kind of three dimensional CT ground water sensitivity analysis system of the embodiment of the present application offer and control method, can effectively solve
The above problem.
A kind of three dimensional CT ground water sensitivity analysis system provided by the present application, including closed container 2, clamping piece, humidity
Controller 20, CT scan device and data acquisition control system 23.
Wherein, to accommodate the confined space of sample, closed container 2 passes the Inner Constitution of closed container 2 equipped with temperature
Sensor.Closed container 2 can be made of high intensity organic glass, outer diameter 60mm, wall thickness 5mm, height 60mm.In closed container 2
Humidity temperature pickup 3 can be set：Position can be provided with the circular hole I of diameter 10mm for installing temperature humidity between in the sidewall
Sensor 3.
Accommodating the inside of the clamping piece of sample closed container 2 can be located in a manner of rotation in an axial direction, such as can be with
Set on the lower section of closed container 2.Clamping piece can be there are many modes of rotation in an axial direction, and one way in which is the bottom of clamping piece
End is connect with the end of connecting shaft, and the other end of connecting shaft is connect across closed container 2 with the shaft of motor, by controlling motor
Rotation, control the rotation of clamping piece.For example, the bottom centre position that may be used in closed container 2 is provided with diameter 10mm's
Circular hole II is specifically that the bottom center of closed container 2 is provided with a circular hole and a supporting steel pipe for installing vertical connecting shaft 5
6 end part seal connection, the size of supporting steel pipe 6 are φ=10mm, t=2mm, and the other end is connect with weighted platform pedestal 8.
8 size 100mm × 80mm of weighted platform pedestal × 90mm, inside have electric rotating motivation 9.Have in supporting steel pipe 6
A piece vertical connecting shaft 5, does not contact with steel pipe walls, and the top of vertical connecting shaft 5 is specimen holder 4, bottom end and rotary electric
Machine 9 connects, and electric rotating motivation 9 can drive vertical connecting shaft 5 around 360 ° of slowly rotations of shaft centre line, to realize sample itself
360 ° of rotations, complete 3-D scanning.2 all tappings of closed container, are all connect with connector with seal with elastometic washer, are ensured closed
The seal of container 2.
It is worth noting that, the device of control clamping piece rotation can also all be located at the inside or bottom of closed container 2,
Rotating mechanism for driving clamping piece to rotate can also use other forms, within the protection domain of the application.
Humidity controller 20 can be humidity controller 20 by pipeline and 2 airtight connection of closed container, specific mode
It is placed in outside closed container 2：2 bottom of closed container is opened there are two circular ventilation circular hole, and the top surface of weighted platform pedestal 8 is also reserved
Two ventilation circular holes, Circularhole diameter φ=5mm, by ventilation pipe 7 by the ventilation circular hole and weighted platform of 2 bottom of closed container
The circular hole of 8 top surface of pedestal connects.The side of weighted platform pedestal 8 also reserve there are two diameter 5mm ventilation circular hole, respectively with top
Two ventilation circular holes in face are connected in inside.Humidity controller 20 passes through with the ventilation circular hole of 8 side of weighted platform pedestal to be connect
Pipeline 21 is connected to, and such humidity controller 20 is just connected with closed container 2.By control different humidity air flowing come
The relative humidity in closed container 2 is automatically controlled, different degrees of saturation is carried out to sample.
The material of ventilation pipe 7 can be stainless steel, outer diameter φ=5mm, wall thickness 1mm, length 172mm.Connecting pipe 21
It is stainless steel tube, outer diameter φ=5mm, wall thickness 1mm, length is depending on the relative position of humidity controller 20.This structure design
It is compact, and be not easy to touch pipeline, stability is good.
Specifically, humidity controller 20, which can also use, is integrated with temperature controlled all-in-one machine, for example France may be used
The WETSYS temperature humidity controller JUMO of triumphant uncut jade science and technology group production, at a certain temperature, dry gas and humidity-saturated gas are mixed
Adjustable and humidity ratio stabilization is generated after conjunction in ± 0.3% gaseous fluid, and the wet of air-flow is measured and accurately controlled by program-controlled
Degree and temperature show moisture curve（Inclined-plane, balance.Humidity ratio increases）, the temperature range of the humidity controller 20 from room temperature to
70 DEG C, relative humidity is from 5% to 95%.Humidity temperature pickup 3 monitors closed in real time in the centre position of 2 side wall of closed container
Humidity in container 2 and temperature change, and by data collecting system, computer is fed back to, then automatically adjust humidity controller
20 working condition keeps the relative humidity in closed container 2 to be in a stable state.It can be realized to closed container 2
Interior relative humidity carries out loop control.
Humidity temperature pickup is 1% using 901350/33 type of Germany JUMO, the wherein measurement accuracy of humidity, and temperature is surveyed
Accuracy of measurement is 0.1 DEG C.
It is noted that humidity controller 20 can also be arranged in the side of closed container 2, the mode of pipeline unicom
Can be diversified, within the protection domain of the application.
CT scan device in system, may include to sample carry out CT scan radiographic source and detector, wherein
Radiographic source is CT dual-energy x-rays source 10, and detector is high-resolution non-crystalline silicon area array detector 13.Radiographic source passes through radiographic source
Support shaft 11 is fixedly connected with the radiographic source pedestal 12 of bottom, the detector bottom that detector passes through detector support shaft 14 and bottom
Seat 15 is fixedly connected.Radiographic source support shaft 11 and detector support shaft 14 can be steel solid cylinder, diameter 30mm, height
200mm is closely connect with support base.
Weighted platform pedestal 8, radiographic source pedestal 12 and detector base 15 are each provided on sliding rail, wherein weighted platform bottom
Seat 8 is fixedly connected with sliding rail, and radiographic source pedestal 12 is located in a manner of it can be moved along sliding rail on sliding rail with detector base 15.
Radiographic source pedestal 12 and 15 size of detector base are all 100mm × 80mm × 60mm, and bottom position on the lower side has
The circular channel of 20mm, inside have the spiral connecting shaft 19 inside link block and slideway 16 to connect, screw thread and spiral shell on link block
Screw thread in rotation connecting shaft 19 matches.
8 lower part of weighted platform pedestal has the circular channel of diameter 20mm, can be sleeved on slideway 16 and fixed.
Slideway 16 is the steel pipe of two diameter 20mm, wall thickness 3mm, long 1000mm.The both ends of sliding rail are located at slideway support bottom
On seat 17, the size of slideway support base 17 is 50mm × 80mm × 150mm, and inside is equipped with stepping motor 18.Slideway 16
Surface is smooth, and upper and lower surface is all provided with the gap of 2mm wide, and steel duct is the stainless steel with fine thread of diameter 10mm
Connecting shaft, 19 long 350mm of spiral connecting shaft, one end and stepping motor 18 connect.
Stepping motor 18 drives spiral connecting shaft 19 to rotate and realizes 10 pedestal of CT dual-energy x-rays source, detection by rotation
Device pedestal 15 slowly moves on slideway 16, adjusts the relative distance with weighted platform 1.Weighted platform pedestal 8, which is fixed to be located at, to be slided
Then the centre position in road 16 controls radiographic source pedestal 12, detector base 15 with 0.01mm/s ~ 10mm/s rates in cunning respectively
It is moved on road 16, displacement is accurate to 0.01mm, adjusts the relative distance between three.
Constituting CT scan equipment further includes：Computer 3D scanning structures image processing system, high-precision precision sweep are flat
Platform, control system, a few part compositions of radiation protection system, by high projective amplification than realizing the high-resolution to being scanned sample
DR (Digital Radiography) is imaged, dual intensity radiographic source and the both sides that closed container 2 is respectively placed in detector, ray
Source, detector, 2 three of closed container are located on straight line, can adjust mutual distance by the slideway 16 of bottom,
To reach preferable shooting effect.The radiographic source of CT scan equipment emits X-ray transparent sample, then is received by a detector, and receives
The power of the optical signal received is transmitted to computer by device, and signal is switched to digital picture by computer again, to obtain sample
Three-dimensional microstructures figure.During CT scan, electric rotating motivation 9 can drive vertical connecting shaft 5 to be rotated with 360 °, rotation speed
Rate 0.01rad/s ~ 1rad/s, displacement accuracy 0.01rad.The rotation angle of electric rotating motivation 9 can be accurately automatic by computer end
Control.
Data acquisition control system 23 utilizes the acquisition of LABVIEW realization data and place by pci data capture card
Reason.Data acquisition control system is monitored by the humidity sensor and humidity controller and is adjusted wet in the closed container
Degree, and adjust during CT scan radiographic source and detector between closed container at a distance from, and control the rotation of clamping piece,
Automatic cycle control and in-situ three-dimensional CT scan to realize relative humidity during sample drying and watering cycle measure.
In order to ensure the stabilization of test process, whole system temperature is constant, in addition to data acquisition control system 23 is placed on CT
The external face of scanner radiation protection System cabine, remaining all component are all placed in CT scanner radiation protection System cabine body, CT
Scanning work needs the environment of relatively dry, so to keep the environment of the drying in CT scan equipment box, closed container 2 is not
With case vivo environment unicom, whole system is placed in thermostatic chamber.
As on the other hand, the embodiment of the present application also provides a kind of controlling party of three dimensional CT ground water sensitivity analysis system
Method includes the following steps：
The humidity data for receiving closed container 2 compares the humidity differences of humidity data and the first setting humidity；
According to humidity differences, the air input and/or discharge rate with setting humidity are adjusted, is allowed until humidity differences are less than
Humidity differences；
Obtain the actual displayed range of scan vision of the sample in CT scan device；
According to the range difference of actual displayed range and target indication range, adjust in scanning means CT radiographic sources and detector with
The distance of sample；
Control CT devices start to scan, and in scanning process, control the rotation of connecting shaft；
After the end of scan, the humidity for adjusting closed container 2 reaches the second setting humidity, repeats the scanning step of CT devices.
The concrete operations implementation steps of the embodiment of the present application are：
1）The sample for needing to scan is got out, size is not greater than the size of 2 internal container of closed container, does not contact closed container
2 inner walls.Sample suitable for the experiment of this equipment has not required certain size, due to not doing Research on Mechanical Properties, only analyzes
Geotechnical engineering medium three-dimensional microstructures during drying and watering cycle change, so the shape of sample does not also require, only require
It can preferably be fixed on specimen holder 4, and no more than the size of closed container 2.Prefabricated sample can be first first
Stable state is saturated under beginning relative humidity, what is be not saturated in advance can be saturated in closed container 2.
2）Sample is installed.Radiation protection system babinet 22 is opened, opens the lid of 2 upper end of closed container, it would be desirable to analyze
Sample be placed on specimen holder 4 it is fixed.Specimen holder 4 is connect with vertical connecting shaft 5,5 bottom end of vertical connecting shaft and rotation
Turn motor 9 to connect together, can slowly be rotated with 360 ° around vertical connecting shaft 5 with sample.Humidity temperature pickup 3 is located at
On 2 side wall of closed container, the humidity and temperature change in closed container 2 are monitored in real time, and number is recorded by data collecting system
According to.After sample is placed, closes the lid, and add vaseline to seal by rubber ring, one is formed in such closed container 2
A relatively closed environment.Close radiation protection system babinet 22.
3）Open humidity temperature pickup 3, rh value and temperature value in real-time monitoring record closed container 2, note
Record time interval can be adjusted voluntarily.
4）The WETSYS humidity controllers 20 that humidity controller 20 is produced using French triumphant uncut jade science and technology group, in specific temperature
Under, gaseous fluid of the adjustable and humidity ratio stabilization ± 0.3% is generated after dry gas and humidity-saturated gas mixing, by program-controlled
To measure and accurately control the humidity and temperature of air-flow, performance moisture curve（Inclined-plane, balance.Humidity ratio increases）, the humidity control
The temperature range of instrument 20 processed is from room temperature to 70 DEG C, and relative humidity is from 5% to 95%.Humidity controller 20 is opened, initial wet is set
Angle value is saturated sample for the first time, and humidity controller 20 will be conveyed by right side pipeline into closed container 2 centainly relatively wet
The air of degree, left side pipeline then draw the air of former relative humidity in closed container 2, and monitored with humidity temperature pickup 3
Data combine, and the relative humidity in real-time control closed container 2 keeps constant value, and in a stable state, allow sample into
Row saturation, saturation time as the case may be depending on, if sample by advance saturation, this phases-time is shorter, if examination
Sample is not saturated in advance, this stage then needs to undergo longer time.
5）After sample saturation, first time scanning is carried out.Ensure that radiation protection system babinet 22 is closed, opens CT
Dual-energy x-ray source 10 preheats 30min.Preheating finishes, and CT dual intensities are adjusted after equipment stabilization by data acquisition control terminal
X-ray source 10, weighted platform 1,13 three of high-resolution non-crystalline silicon area array detector relative position.Weighted platform 1 is consolidated
Due on slideway 16, it is located at the centre position in CT dual-energy x-rays source 10 and high-resolution non-crystalline silicon area array detector 13, computer
The positive and negative rotation of end control stepper motor is accurate to adjust CT dual-energy x-rays source 10, high-resolution non-crystalline silicon area array detector 13
At a distance from weighted platform 1, suitable position is in the scan vision of computer terminal it can be seen that complete sample, and will not
Amplification factor is improved in the region for wasting the visual field as far as possible, improves shooting precision.Amplification factor is higher, and scanning accuracy is higher, and three
The precision of Victoria C T scannings is up to micron order.
6）After adjusting the visual field, " starting to scan " button of computer terminal three-D CT scanning software is clicked, is carried out three-dimensional
CT scan, scanning process are full automatic, no longer need to carry out manual operation.After scanning starts, electric rotating motivation 9 by connecting vertically
With sample, around vertical connecting shaft 5, with 360 °, slowly rotation, the speed of rotation are set spindle 5 automatically according to the time of Radiolucent sample
It is fixed, it need not be manually set, the end of scan just rotates a circle, and is then automatically stopped rotation, to obtain three-D CT scanning figure
Picture.CT scan test time it is related with the fundamental characteristics of material, structure is finer and close, density is bigger, size is bigger, need when
Between it is longer.
7）After the completion of preliminary scan test, CT dual-energy x-rays source 10 is closed, keeps scan data, three dimensional CT is closed and sweeps
Retouch software.The new rh value of humidity controller 20 is set according to experimental program, humidity controller 20 can automatically control air
Flowing, so that the relative humidity in closed container 2 is reached new steady s tate, sample be saturated, saturation time needs root
According to advance experiment determine each state to be saturated how long.
8）After equal samples reach new steady s tate, CT dual-energy x-rays source 10 is opened, opens three-D CT scanning software, no
With the position between adjustment CT dual-energy x-rays source 10, weighted platform 1, high-resolution non-crystalline silicon area array detector 13.Click three
Beginning scan button on Victoria C T scanning softwares carries out three-D CT scanning test.
9）Repetitive operation step 6,7 only wait for sample to reach new with the setup parameter for changing humidity controller 20 every time
After stable state, three-D CT scanning test is repeated.It until entire drying and watering cycle process finishes, can be obtained by, try in this way
Sample is during drying and watering cycle, the three-dimensional CT scan image under each relative humidity state, realizes sample microscopic three-dimensional information
Visualization carries out the microstructure characteristic of reprocessing analysis research sample.
10）Last time three-D CT scanning test after the completion of, keep data acquisition control system 23 record data and
Three-D CT scanning result.10 power supply of CT dual-energy x-rays source is closed, control terminal operation stepper motor rotation is pulled open radiographic source, added
The distance between carrying platform 1, detector close humidity controller 20.
11）Radiation protection system babinet 22 is opened, closed container 2 is opened, removes sample, it is multiple to cover 2 lid of closed container
Radiation protection system babinet 22 is closed in position, waits for experiment next time.
Whole operation process realizes control unitary variant, avoids influence of the unnecessary factor to sample, automates journey
Degree is high, it is ensured that test it is accurate and reliable.The in-situ tracking test function for realizing the analysis of rock water sensitivity, to study ground work
The microcosmic mechanism of Cheng Jiezhi water sensitivities provides new method.System operatio is easy, and control accuracy is high, and scanning result really may be used
It leans on.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.People in the art
Member should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature
Other technical solutions of arbitrary combination and formation.Such as features described above has similar work(with (but not limited to) disclosed herein
Can technical characteristic replaced mutually and the technical solution that is formed.
Claims (10)
1. a kind of ground water sensitivity analysis system, which is characterized in that including：
Closed container, Inner Constitution which is provided with humidity sensor to accommodate the confined space of sample；
Clamping piece, the inside the closed container can be set in a manner of rotation in an axial direction；
Humidity controller is connect with the closed container by pipeline sealing, to control the humidity in the closed container；
CT scan device includes to carry out the radiographic source and detector of CT scan to the sample；
Data acquisition control system is connect with the humidity sensor, humidity controller, CT scan device；
The data acquisition control system is monitored by the humidity sensor and humidity controller and adjusts the closed container
In humidity, and adjust during CT scan the rotation of the clamping piece, it is opposite during sample drying and watering cycle to realize
The automatic cycle control of humidity and in-situ three-dimensional CT scan measure.
2. ground water sensitivity analysis system according to claim 1, which is characterized in that the radiographic source and detector with
The mode that can be moved towards or away from the closed container is arranged in the both sides of the closed container, the data acquisition control system
System control adjusts the radiographic source and detector at a distance from the closed container.
3. ground water sensitivity analysis system according to claim 2, which is characterized in that the system also includes sliding rail,
The pedestal of the pedestal of the radiographic source and the detector is located in a manner of it can be axially moved along the sliding rail on the sliding rail.
4. ground water sensitivity analysis system according to claim 1, which is characterized in that further include temperature sensor and temperature
Controller is spent, the temperature controller and the humidity controller are integrated machine.
5. ground water sensitivity analysis system according to claim 1, which is characterized in that the clamping piece and connecting shaft
End connect, the connecting shaft can rotation in an axial direction, the system also includes weighted platform pedestal, in the weighted platform pedestal
Equipped with motor, the connecting shaft passes through the bottom of the closed container, the motor axis connection of the other end and the motor.
6. ground water sensitivity analysis system according to claim 5, which is characterized in that the connecting shaft passes through described close
The opening for closing container is equipped with to the closed sealing ring of holding container.
7. ground water sensitivity analysis system according to claim 5, which is characterized in that the closed container and it is described plus
Support tube is equipped between carrying platform, the support tube is set to the outside of the connecting shaft, the outer wall of the connecting shaft and the branch
Spacing is equipped between the inner wall of strut.
8. ground water sensitivity analysis system according to claim 1, which is characterized in that connect the humidity controller and
The pipeline of closed container includes air inlet pipeline and outlet pipe.
9. ground water sensitivity analysis system according to claim 1, which is characterized in that the system also includes with to prevent
The only babinet of ray radiation, the closed container and CT scan device are placed in the inside of the babinet.
10. a kind of control method being applied to the ground water sensitivity analysis system as described in claim 1-9 is any, including with
Lower step：
Receive the humidity data of closed container, the humidity differences of the humidity data and the first setting humidity；
According to the humidity differences, the air input and/or discharge rate with setting humidity are adjusted, until the humidity differences
Less than allowing humidity differences；
Obtain the actual displayed range of scan vision of the sample in CT scan device；
According to the range difference of the actual displayed range and target indication range, adjust in the scanning means CT radiographic sources and
Detector is at a distance from the sample；
It controls the CT devices to start to scan, in scanning process, controls the rotation of connecting shaft；
After the end of scan, the humidity for adjusting the closed container reaches the second setting humidity, repeats the scanning step of CT devices.
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| CN201810081442.1A CN108333196A (en) | 2018-01-29 | 2018-01-29 | A kind of ground water sensitivity analysis system and its control method |
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| CN111650224A (en) * | 2020-05-09 | 2020-09-11 | 北京科技大学 | Constant temperature and humidity device for industrial CT scanning |
| CN112129791A (en) * | 2020-09-09 | 2020-12-25 | 武汉大学 | General in-situ experimental device based on rotary X-ray computed tomography |
| CN113820210A (en) * | 2021-09-13 | 2021-12-21 | 华能澜沧江水电股份有限公司 | Rotary rockfill triaxial dry-wet cycle test device and test method |
| CN115308234A (en) * | 2022-08-09 | 2022-11-08 | 山东科技大学 | Method for measuring and analyzing air entraining fresh concrete bubbles |
| CN115902167A (en) * | 2023-01-09 | 2023-04-04 | 水利部交通运输部国家能源局南京水利科学研究院 | Soil body crack and strength evolution test device under dry-wet circulation and groundwater level coupling |
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