CN106950161A - A kind of comprehensive soil moisture detection device - Google Patents
A kind of comprehensive soil moisture detection device Download PDFInfo
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- CN106950161A CN106950161A CN201710324698.6A CN201710324698A CN106950161A CN 106950161 A CN106950161 A CN 106950161A CN 201710324698 A CN201710324698 A CN 201710324698A CN 106950161 A CN106950161 A CN 106950161A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses a kind of comprehensive soil moisture detection device, including workbench, workbench upper end is provided with two adjustable support frames, adjustable support frame upper end is provided with measurement container, measure container left end insertion soil water suction detection means, measurement container upper end spaced set has several TDT detection means, measurement container lower end is provided with γ transmission beam method detection means, measurement container right-hand member is provided with inlet channel, inlet channel upper end is provided with water supply valve, inlet channel right-hand member is connected with geneva bottle, soil to be detected is put into wherein by measuring container, carry out indoor soil treatment, it is convenient and swift, the suction in soil is effectively have detected using soil water suction detection means, the different soil moisture content distribution curves for infiltrating the moment are detected by combining moveable device with γ transmission beam methods, it conveniently have detected the water content and infiltration rate in soil, it is worthy to be popularized.
Description
Technical field
The present invention relates to Soil K+adsorption equipment technical field, specially a kind of comprehensive soil moisture detection device.
Background technology
Mineral matter of the soil by rock decay, animals and plants, organic matter that microorganism residuum decomposition is produced, geobiont
(solid matter) and moisture (liquid phase substance), air (gaseous substance), the composition such as the humus of oxidation.Solid matter includes soil
Earth mineral matter, organic matter and microorganism pass through nutriment for being obtained after the antibacterial sterilizing of illumination etc..Liquid substance refers mainly to soil moisture.
Gas is the air being present in soil aperture.The class material of this in soil three constitutes a unity of contradictions body.They are mutual
Contact, conditions each other, and provides required living condition for crop, is the material base of soil fertility.The soil water is plant absorption
The main source (except hydroponic plant) of moisture, plant can also directly absorb in addition falls the moisture on blade on a small quantity.Soil
The main source of water is precipitation and irrigation water, participates in the moisture systemic circulation of lithosphere-biosphere-atmospheric thermodynamics-circle-hydrosphere, and native
The potassium element being rich in earth is also the main component of nutrient, in soil water movement research, using non-damaged one-point measurement soil
The method of earth water content is a lot, but is that Neutron is still that current researcher usually adopts with γ transmission beam methods using the method for nuclear physics
Measurement means.Wherein γ transmission beam methods due to can relatively accurately determine the change of Soil Moisture profile under instantaneous state,
And the features such as with interlayer high resolution, thus more and more paid attention to by studies in China person, soil moisture content is both research agriculture
The important indicator of industry and forestry Crops Drought, is also agricultural irrigation management, the research of Regional Hydrologic condition and basin water balance meter
The Important Parameters of calculation, the change of soil moisture content directly affects farm-forestry crop yield and soil development is developed, high salinity soil
(salt content is more than 6/1000ths) and highest organic soil earth (containing organic matter more than 20%) moisture detection in real time is always a problem.
Conventional soil moisture measurement method is divided into direct method and electric-resistivity method, dielectric method, NEUTRON METHOD, the Near-Infrared Absorption Methods such as oven drying method, bottle bucket method
Etc. indirect method, its dielectric method is divided into time domain reflectometry (TDR), frequency domain bounce technique (FDR), standing-wave ratio method (SWR) etc. again.
Application No. 201610194101.6, a kind of entitled hair for the soil moisture measuring instrument for being applicable different soils depth
Bright patent, including soil moisture sensor and communicate the data acquisition display instrument that is connected, the soil water with soil moisture sensor
Sub-sensor includes shell, and shell is divided into the procapsid sealed by epoxy resin and back casing two parts, and enclosure is provided with
The passive crystalline substance that concussion is produced by clock circuit is integrated with electronic circuit device plate and shielded cable, electronic circuit device plate
Shake, passive crystal oscillator is connected with Schmidt trigger, signal attenuator, probe, real effective detector and for providing in turn
The stable, electric source filter circuit of ripple-free operating voltage, the invention low cost, it is simple in construction, can in real time measure and be applicable difference
The soil moisture of depth of soil.
In all kinds of mathematical problems about soil water movement are solved, soil water property --- i.e. hydraulic conductivity k
(θ), specific water capacity C (θ) and diffusivity D (θ) determination are a very important job.These general parameters are both needed to by reality
The method of survey just can determine that, because these three parameters are all the functions of soil moisture content, thus at present either indoors or
Crop field is surveyed, the problem of all too busy to get away measurement soil moisture content of almost all of method or moisture profile change, but mesh
Preceding many soil testing assemblies are poor in the Soil K+adsorption effect for different gradient, and for soil inner suction and infiltration
The detection of speed is not contrasted well, when to hydraulic conductivity k (θ), specific water capacity C (θ) and diffusivity D (θ) measurement, a lot
When all individually carry out, it is impossible to obtain mutually related data, therefore devise a kind of comprehensive soil water go-on-go
Survey device.
The content of the invention
In order to overcome the shortcomings of prior art, the present invention provides a kind of comprehensive soil moisture detection device, passed through
Soil to be detected is put into wherein by measurement container, carries out indoor soil treatment, convenient and swift, it is only necessary to collection in worksite soil-like
After this, it is possible to without being detected on the spot, the gradient of soil horizon can be adjusted by adjustable support frame, different gradient is carried out
Soil permeability detection, the suction in soil is effectively have detected using soil water suction detection means, be easy to understand soil pair
In the absorbability of moisture, and measure one way of the electromagnetic wave signal in sensor probe by multiple TDT detection means and transmit
Time delay, to realize the medium determination of moisture in soil to be measured, examined by combining moveable device with γ transmission beam methods
The soil moisture content distribution curve that difference infiltrates the moment is surveyed, the water content in soil is conveniently have detected and penetrates into speed
Rate, is worthy to be popularized.
The technical solution adopted for the present invention to solve the technical problems is：A kind of comprehensive soil moisture detection device, bag
Workbench is included, the workbench upper end is provided with two adjustable support frames, and the adjustable support frame upper end is provided with
Container is measured, the measurement container left end inserts soil water suction detection means, and the measurement container upper end spaced set has
Several TDT detection means, the measurement container lower end is provided with γ transmission beam method detection means, and the measurement container right-hand member is set
There is inlet channel, the inlet channel upper end is provided with water supply valve, and the inlet channel right-hand member is connected with geneva bottle；
The measurement container includes transparent quartz tube, and the transparent quartz tube upper end is provided with several detection jacks, institute
State detection jack and be internally provided with sealing-plug, the sealing-plug is internally provided with inside detection perforation, the transparent quartz tube and set
Permeable rock layer is equipped with, the permeable rock layer right-hand member is provided with hydroecium, and the hydroecium right-hand member is provided with hydroecium opening；
The soil water suction detection means includes glass tube, and the glass tube lower end is provided with pot clay end, the clay
Head upper end is provided with collecting pipe, and the collecting pipe upper end is provided with collecting pipe sealing-plug, the collecting pipe sealing-plug
For truncated cone-shaped structure, the collecting pipe upper end is provided with capillary blast pipe, and the capillary blast pipe is connected with silica gel joint, institute
State silica gel joint and be internally provided with pressure sensor, the pressure sensor is connected with constant-current source and digital voltmeter；
The TDT detection means includes TDT casings, is provided with four contact points on the TDT casings, the contact point it
Between be provided with two U-shaped probes, the contact point is connected with the contact of Network Analyzer and oscillograph, wherein upper end by wire
The CH1 interfaces of point the RF OUT interfaces of connection Network Analyzer and oscillograph respectively, middle two contact points ground connection, lower end connects
Contact portion oscillograph CH2 interfaces；
The γ transmission beam methods detection means includes sliding panel, and the sliding panel two ends are provided with movable pulley, the sliding panel
On be provided with radioactive source, the radioactive source upper end is arranged with ray probe in parallel, and the ray probe outside is provided with lead screen
Cover, the ray probe is connected with scaler.
As a kind of preferred technical scheme of the present invention, the adjustable support frame includes support frame base, the support
Frame base is trapezium structure, and support frame as described above base upper end is provided with sleeve, the sleeve and is provided with piston rod, institute
State piston rod upper end and be provided with fixed cover, the fixed cover is internally provided with rubber ring, the rubber ring and is provided with opening.
As a kind of preferred technical scheme of the present invention, the permeable rock layer two ends are provided with metal net layer, the metal
Stratum reticulare is made of stainless steel material, and mesh uses diamond-shaped meshes inside the metal net layer, and the hydroecium open interior is set
There are filtering meshes, the filtering meshes are made of PP cotton materials.
As a kind of preferred technical scheme of the present invention, the U-shaped probe diameter is 2.0mm, wherein adjacent two are U-shaped
Probe spacing is 10mm, and the U-shaped probe is made of waveguide stainless steel material.
As a kind of preferred technical scheme of the present invention, metal foam layers, the metal are provided with the outside of the sliding panel
Tungsten resin particle is filled with inside froth bed.
As a kind of preferred technical scheme of the present invention, there is shadow shield at the workbench two ends by gemel connection, institute
State and be provided with shadow shield spacing angle bar.
Compared with prior art, the beneficial effects of the invention are as follows：Soil to be detected is put into wherein by measuring container,
Indoor soil treatment is carried out, it is convenient and swift, it is only necessary to after collection in worksite soil sample, it is possible to without being detected on the spot, lead to
The gradient of soil horizon can be adjusted by crossing adjustable support frame, the soil permeability detection of different gradient be carried out, using soil water suction
Detection means effectively have detected the suction in soil, be easy to understand absorbability of the soil for moisture, and pass through multiple TDT
Detection means measures one way propagation delay time of the electromagnetic wave signal in sensor probe, to realize the medium in soil to be measured
Determination of moisture, detects that the different soil moisture contents for infiltrating the moment are distributed by combining moveable device with γ transmission beam methods bent
Line, conveniently have detected the water content and infiltration rate in soil, is worthy to be popularized.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is present invention measurement structure of container schematic diagram；
Fig. 3 is soil water suction structure of the detecting device schematic diagram of the present invention；
Fig. 4 is TDT structure of the detecting device schematic diagram of the present invention；
Fig. 5 is γ transmission beam methods structure of the detecting device schematic diagram of the present invention；
Fig. 6 is adjustable support frame structural representation of the present invention.
In figure：1- workbenches, 2- adjustable support frames, 3- measurement containers, 4- soil water suction detection means, 5-TDT
Detection means, 6- γ transmission beam method detection means, 7- inlet channels, 8- water supply valves, 9- geneva bottle, 10- transparent quartz tubes, 11-
Detect jack, 12- sealing-plugs, 13- detection perforation, 14- permeable rock layers, 15- hydroeciums, 16- hydroecium openings, 17- glass tubes, 18-
Pot clay end, 19- collecting pipes, 20- collecting pipe sealing-plugs, 21- capillary blast pipes, 22- silica gel joints, 23- pressure sensors,
24- constant-current sources, 25- digital voltmeters, 26-TDT casings, 27- contact points, 28-U type probes, 29- wires, 30- network analysis
Instrument, 31- oscillographs, 32- sliding panels, 33- movable pulleies, 34- radioactive sources, 35- rays probe, 36- lead screen covers, 37- scaler,
38- support frame bases, 39- sleeves, 40- piston rods, 41- fixed covers, 42- rubber rings, 43- openings, 44- metal net layers, 45- mistakes
Filter mesh layer, 46- metal foam layers, 47- tungsten resin particles, 48- hinges, 49- shadow shields, the spacing angle bar of 50-.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment：
As shown in Figures 1 to 6, the invention provides a kind of comprehensive soil moisture detection device, including workbench 1,
The upper end of workbench 1 is provided between two adjustable support frames 2, described two adjustable support frames 2 and is provided with measurement
Container 3, the measurement container 3 left end insertion soil water suction detection means 4, the measurement upper end spaced set of container 3 has
Several TDT detection means 5, measurement container 3 lower end is provided with γ transmission beam methods detection means 6, the measurement right-hand member of container 3
Inlet channel 7 is provided with, the upper end of inlet channel 7 is provided with water supply valve 8, and the right-hand member of inlet channel 7 is connected with geneva
Bottle 9, geneva bottle 9 is attached by the inlet channel 7 of hard, and is supported by the inlet channel 7 of hard, geneva bottle 9
The weight of workbench 1 is significantly less weight than, is not in the situation of overturning.
As shown in Fig. 2 heretofore described measurement container 3 includes transparent quartz tube 10, the upper end of transparent quartz tube 10
Several detection jacks 11 are provided with, the detection jack 11 is internally provided with sealing-plug 12, and the inside of sealing-plug 12 is set
There is detection perforation 13, the transparent quartz tube 10 is internally provided with permeable rock layer 14, and the right-hand member of permeable rock layer 14 is provided with water
Room 15, the right-hand member of hydroecium 15 is provided with hydroecium opening 16, and hydroecium opening 16 is connected with inlet channel 7, so by geneva bottle 9 with
Measurement container 3 links together, and geneva bottle 9 injects the water of infiltration into measurement container 3.
As shown in figure 3, heretofore described soil water suction detection means 4 is included under glass tube 17, the glass tube 17
End is provided with pot clay end 18, and the upper end of pot clay end 18 is provided with collecting pipe 19, and the upper end of collecting pipe 19 is provided with collection
Feed channel sealing-plug 20, the collecting pipe sealing-plug 20 is truncated cone-shaped structure, and the upper end of collecting pipe 19 is provided with capillary
Blast pipe 21, the capillary blast pipe 21 is connected with silica gel joint 22, and the silica gel joint 22 is internally provided with pressure sensor
23, the pressure sensor 23 is connected with constant-current source 24 and digital voltmeter 25.
As shown in figure 4, heretofore described TDT detection means 5 includes being provided with TDT casings 26, the TDT casings 26
Two U-shaped probes 28 are provided between four contact points 27, the contact point 27, the U-shaped inside of probe 28 is electric with contact point 27
Connection, is conducting state, the contact point 27 is connected with Network Analyzer 30 and oscillograph 31, Network Analyzer by wire 29
There are two joints of RF IN and RF OUT on 30, input signal and output signal are connected respectively；On oscillograph 31 have CH1 and
Two terminations of CH2.Wherein the contact point 27 of the upper end of TDT casings 26 connects RF OUT interfaces and the oscillography of Network Analyzer 30 respectively
Two contact points 27 are grounded in the middle of the CH1 interfaces of device 31, TDT casings 26, and middle two contact points 27 are grounded, and centre is less
U-shaped probe 28, is contrasted for the U-shaped probe 28 larger with outside so that form electromagnetic wave between two U-shaped probes 28,
And the waveform between two U-shaped probes 28 is shown by oscillograph 31, to carry out the measure of parameter, the contact point 27 of lower end
Connect the CH2 interfaces of oscillograph 31.
As shown in figure 5, heretofore described γ transmission beam methods detection means 6 includes sliding panel 32, the two ends of sliding panel 32
It is provided with movable pulley 33, the sliding panel 32 and is provided with radioactive source 34, the upper end of radioactive source 34 is arranged with ray spy in parallel
First 35, the outside of ray probe 35 is provided with lead screen cover 36, and the ray probe 35 is connected with scaler 37.
The operation principle of the present invention：Before the use, by the way that collecting device is by soil collection to be measured and is put into measurement container 3
It is interior, the hydroecium 15 of the right-hand member of transparent quartz tube 10 is opened, is together by a threaded connection between hydroecium 15 and transparent quartz tube 10, will
Soil sample to be measured is filled up inside transparent quartz tube 10, one end pad upper dankness stone layer 14, and by hydroecium 15 and transparent quartz tube
10 reconnect together, by soil water suction detection means 4 and TDT detection means 5 by detecting that jack 11 is inserted, sealing-plug
12 seal up soil water suction detection means 4 and TDT detection means 5, it is to avoid external ambient influnence detection knot when detection
Really, after the plug on 9 tops of geneva bottle is opened, water is injected into geneva bottle 9 by the perforation on top, opened on inlet channel 7
Water supply valve, water under gravity, into inside transparent quartz tube 10, you can proceed by measurement.
Soil water suction detection means 4 is primary structure with glass tube 17 in the present invention, the pot clay end 18 set when lower end
After touching the moisture in soil, by moisture absorption so that air is absorbed in the collecting pipe 19 inside glass tube 17, is led
Air pressure inside is caused to become big, the capillary blast pipe 21 that collecting pipe 19 is connected produces suction when air pressure is reduced, and suction causes
The detection shell fragment of pressure sensor 23 is deformed upon, and causes resistance to change, so as to show difference on digital voltmeter 25
Voltage value, the size of internal soil water suction can be conversed according to voltage value.
What deserves to be explained is time-domain transmission (Time domain transmisson, TDT) principle, its work in the present invention
Process is that the dielectric for measuring soil media by measuring propagation time of the electromagnetic wave signal in embedded soil media waveguide is normal
Number, TDT technologies are a kind of emerging electromagnetic techniques, and this method was introduced into medium determination of moisture research field, TDT detections in recent years
Device 5 is installed on casing 26 is provided with two U-shaped probes 28 on multiple contact points 27, contact point 27, be considered as one section of biography
Defeated line, what is filled around it is that dielectric constant is εrSoil media, its equivalent-circuit model be parallel double conducting wire transmission line, survey
Try is suddenly：
(1) by the signal output of Network Analyzer 30 terminate at TDT probe one end (TDT probe refers to two it is U-shaped spy
The sonde configuration that pin 28 is constituted), while the CH1 signal input parts of oscillograph 31 are connected in parallel on into interface, the other end of TDT probes
Connect the CH2 of oscillograph 31, one 47 Ω of synchronous signal output end short circuit noninductive resistance, the letter come for Assimilation and conductivity
Number, it to avoid reflection, the signal observation of influence oscillograph；
(2) instrument is opened, the output signal frequency of Network Analyzer 30 is tuned into 20MHz, now slowly TDT popped one's head in
Stretch into transparent quartz tube 10, observation waveform change, and record；
(3) signal source frequency is increased, observation waveform changes and recorded；
It can be gone out by the step by waveform observation in the present invention, the moisture in the soil of diverse location；
γ transmission beam methods detection means 6 coordinates movable pulley 33 to be slided on workbench 1 by sliding panel 32 in the present invention, sliding
Driving wheel 33 is is fixedly installed, when measuring, by transparent quartz tube 10 be arranged on radioactive source 34 and ray probe 35 it
Between, radioactive source 34 is popped one's head in ray, and 35 is equal and transparent quartz tube 10 keeps certain interval, between radioactive source 34 and ray probe 35
Line be mutually perpendicular to the axis of transparent quartz tube 10, promote sliding panel 32 so that radioactive source 34 and ray pop one's head in 35 company
The soil that line passes through inside transparent quartz tube 10, irradiation transparent quartz tube 10, can be transmitted by the output that infiltrates of geneva bottle 9 to γ
The different Soil Moisture profile θ (ti) for infiltrating moment ti are tested and screened detected by method, have measurement enough to obtain
The Soil Moisture profile of precision is as the reliable basis of calculating parameter, and the basic ideas of the method are：In horizontal soil column permeability intensity
During, the different soil moisture contents for infiltrating moment ti more can be accurately detected under instantaneous state using γ transmission beam methods and are distributed
Curve θ (ti), and after permeability intensity terminates, and the slow process redistributed using soil moisture, in wetting front front end
Synchro measure soil moisture content θ and suction S variation relation is pinpointed using γ transmission beam methods and tensometer, so as to realize in a water
During grading post permeability intensity, while determining 3 unsaturated soil hydraulic properties (hydraulic conductivity k (θ), specific water capacity C
(θ) and diffusivity D (θ)) purpose, according to horizontal column infiltration determine diffusivity principle, can be by the soil after any screening
Earth moisture profile θ (ti) calculates diffusivity D (ti), also can calculate multiple expansions by the Soil Moisture profile after multiple screenings
The rate of dissipating, then takes its average value, to ensure the reliability of value, because 3 soil water properties (hydraulic conductivity k (θ), compare water
Capacity C (θ) and diffusivity D (θ)) obtained in same level earth pillar permeability intensity, experiment work amount is not only substantially reduced,
And it also avoid in each parameter experiment is determined respectively, because of the brought puzzlement that is not quite similar of the preparation of soil sample, lead shield is set
Covering 36 pairs of cover prevents the influence of surrounding enviroment ray and improves measurement accuracy and interlayer resolution ratio, the letter that ray probe 35 is collected
Number being transferred to scaler 37 gathers.
As shown in fig. 6, heretofore described adjustable support frame 2 includes support frame base 38, support frame as described above base 38
For trapezium structure, the upper end of support frame as described above base 38 is provided with sleeve 39, the sleeve 39 and is provided with piston rod 40, the work
The upper end of stopper rod 40 is provided with fixed cover 41, and the fixed cover 41 is internally provided with rubber ring 42, the rubber ring 42 and is provided with
Opening 43, measurement container 3 is inserted inside fixed cover 41, and rubber ring 42 is closely fitted with measurement container 3, and on rubber ring 42
The opening 43 of setting allows rubber ring 42 to open different sizes, it is to avoid measurement container 3 inserts inconvenience, can pass through piston
Bar 40 carry out support regulation up and down, realize for detection container 3 the gradient adjust, it is measurable go out different gradient for different soil
The infiltration rate of earth.
As shown in Fig. 2 the heretofore described two ends of permeable rock layer 14 are provided with metal net layer 44, the metal net layer 44 is adopted
It is made of stainless steel material, the inside mesh of metal net layer 44 uses diamond-shaped meshes, by metal net layer 44 in equipment
The permeable rock layer 14 in portion is fixed, and the hydroecium opening 16 is internally provided with filtering meshes 45, and the filtering meshes 45 are used
PP cotton materials are made, and filter the impurity into the internal water of detection container 3, it is to avoid influence γ transmission Detection results.
What deserves to be explained is, heretofore described pressure sensor 23 uses PXM309 type pressure sensors, and its work is former
Manage as resistive pressure sensor, output voltage is 0-10Vdc, static accuracy is 350mbar-700bar, operating temperature for-
40-85 DEG C, the pressure parameter collected is converted into voltage and shown.
What deserves to be explained is, a diameter of 2.0mm of heretofore described U-shaped probe 28, wherein two adjacent U-shaped probes 28
Spacing is 10mm, and the U-shaped probe 28 is made of waveguide stainless steel material, and the Network Analyzer 30 uses NA7300A types
Network Analyzer, frequency range is 0.3-3000MHz, and frequency stability is≤± 5 × 10- 6, frequency resolution is 1Hz, as
Adjustable signal source, the oscillograph 31 uses the DS1302CA type oscillographs that Beijing Pu Yuan is produced, and the peak frequency of measurement is
300MHz, sample rate scope is 1Sa/s-2GSa/s, obtains the waveform of the electromagnetic wave signal of the U-shaped probe 28 in two ends.
What deserves to be explained is, heretofore described radioactive source 34 using iron 55, cobalt 57, Co 60, selenium 75, Ce 137, thulium 170,
Ir192, one kind of plutonium 238 and americium 241 are made, and the thickness of lead screen cover 36 is 4-10mm, and collimating aperture is 10mm, measurement essence
Degree is not less than 3%, and interlayer resolution ratio is 22mm.
What deserves to be explained is, heretofore described ray probe 35 is using REN-GM-L types ray probe, and measurement range is
0.01 μ Sv/h-2500 μ Sv/h, energy response be 48keV-1.5MeV≤± 30%, communication standard be RS485/RS232 with
MODBUS communication protocols, operating temperature is -10 DEG C -+50 DEG C.
What deserves to be explained is, heretofore described scaler 37 uses FH463B type scaler, and threshold value adjustable extent is
0.1V-5V continuously adjustabes, deviation from linearity≤± 0.5%, the wide adjustable extent in road is 0.1-3V, and input pulse width is 0.1 μ s-
100 μ s, High voltage output scope is 0V ± 50V continuously adjustabes.
As shown in figure 5, the heretofore described outside of sliding panel 32 is provided with metal foam layers 46, the metal foam layers 46
Inside is filled with tungsten resin particle 47, and gamma-ray radiation can be effectively shielded using tungsten resin particle 47.
As shown in figure 1, the heretofore described two ends of workbench 1 are connected with shadow shield 49, the shading by hinge 48
Spacing angle bar 50 is provided with plate 49.
Soil to be detected is put into wherein by the present invention by measuring container, carries out indoor soil treatment, convenient and swift, only
Need after collection in worksite soil sample, it is possible to without being detected on the spot, soil horizon can be adjusted by adjustable support frame
The gradient, carry out different gradient soil permeability detection, effectively be have detected using soil water suction detection means in soil
Suction, is easy to understand absorbability of the soil for moisture, and measures electromagnetic wave signal in sensing by multiple TDT detection means
The one way propagation delay time in device probe, to realize the medium determination of moisture in soil to be measured, by using γ transmission beam method knots
Close moveable device to detect the different soil moisture content distribution curves for infiltrating the moment, conveniently have detected in soil
Water content and infiltration rate, are worthy to be popularized.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit is required rather than described above is limited, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as to the claim involved by limitation.
Claims (6)
1. a kind of comprehensive soil moisture detection device, including workbench (1), workbench (1) upper end are provided with two
Individual adjustable support frame (2), it is characterised in that：Adjustable support frame (2) upper end is provided with measurement container (3), described to survey
Container (3) left end insertion soil water suction detection means (4) is measured, measurement container (3) upper end spaced set there are several
TDT detection means (5), described measurement container (3) lower end is provided with γ transmission beam methods detection means (6), and the measurement container (3) is right
End is provided with inlet channel (7), and inlet channel (7) upper end is provided with water supply valve (8), inlet channel (7) right-hand member
It is connected with geneva bottle (9)；The TDT detection means (5) includes being provided with four on TDT casings (26), the TDT casings (26)
Two U-shaped probes (28) are provided between contact point (27), the contact point (27), the contact point (27) passes through wire (29)
Being connected with Network Analyzer (30) and oscillograph (31), Network Analyzer (30) has two joints of RF IN and RF OUT, point
Lian Jie not input signal and output signal；There are two terminations of CH1 and CH2 on oscillograph (31).TDT casings (26) upper ends connects
Contact (27) connects the RF OUT interfaces of Network Analyzer (30) and the CH1 interfaces of oscillograph (31), middle two contacts respectively
Point (27) is grounded, contact point (27) connection oscillograph (31) CH2 interfaces of lower end.
2. a kind of comprehensive soil moisture detection device according to claim 1, it is characterised in that：The U-shaped probe
(28) a diameter of 2.0mm, wherein two adjacent U-shaped probe (28) spacing are 10mm, the U-shaped probe (28) uses waveguide not
Rust Steel material is made.
3. a kind of comprehensive soil moisture detection device according to claim 1, it is characterised in that：The workbench
(1) two ends are connected with shadow shield (49), the shadow shield (49) by hinge (48) and are provided with spacing angle bar (50).
4. a kind of comprehensive soil moisture detection device according to claim 1, it is characterised in that：The adjustable support
Frame (2) includes support frame base (38), and support frame as described above base (38) is trapezium structure, and support frame as described above base (38) upper end is set
It is equipped with sleeve (39), the sleeve (39) and is provided with piston rod (40), piston rod (40) upper end is provided with solid
Fixed set (41), the fixed cover (41) is internally provided with rubber ring (42), the rubber ring (42) and is provided with opening (43).
5. a kind of comprehensive soil moisture detection device according to claim 1, it is characterised in that：The Network Analyzer
(30) model NA7300A, its frequency range is 0.3-3000MHz.
6. a kind of comprehensive soil moisture detection device according to claim 1, it is characterised in that：The oscillograph (31)
Model DS1302CA, its maximum measurement frequency be 300MHz.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710324698.6A CN106950161A (en) | 2017-05-10 | 2017-05-10 | A kind of comprehensive soil moisture detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710324698.6A CN106950161A (en) | 2017-05-10 | 2017-05-10 | A kind of comprehensive soil moisture detection device |
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| Publication Number | Publication Date |
|---|---|
| CN106950161A true CN106950161A (en) | 2017-07-14 |
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ID=59479075
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117890394A (en) * | 2024-03-14 | 2024-04-16 | 中铁七局集团第三工程有限公司 | Device and method for detecting mud cake of shield cutter head |
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2017
- 2017-05-10 CN CN201710324698.6A patent/CN106950161A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117890394A (en) * | 2024-03-14 | 2024-04-16 | 中铁七局集团第三工程有限公司 | Device and method for detecting mud cake of shield cutter head |
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Application publication date: 20170714 |