CN107014837A - A kind of soil moisture detection device based on γ transmission beam methods - Google Patents
A kind of soil moisture detection device based on γ transmission beam methods Download PDFInfo
- Publication number
- CN107014837A CN107014837A CN201710324730.0A CN201710324730A CN107014837A CN 107014837 A CN107014837 A CN 107014837A CN 201710324730 A CN201710324730 A CN 201710324730A CN 107014837 A CN107014837 A CN 107014837A
- Authority
- CN
- China
- Prior art keywords
- soil
- transmission beam
- detection means
- beam methods
- soil moisture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention discloses a kind of soil moisture detection device based on γ transmission beam methods, 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 soil moisture detection dress based on γ transmission beam methods
Put.
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 by the sealed procapsid of 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 cost is low, simple in construction, can measure in real time 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 soil based on γ transmission beam methods
Earth moisture content detection device.
The content of the invention
In order to overcome the shortcomings of prior art, the present invention provides a kind of soil moisture detection dress based on γ transmission beam methods
Put, be put into soil to be detected wherein by measuring container, carry out indoor soil treatment, it is convenient and swift, it is only necessary to adopt at scene
Collect after soil sample, it is possible to without being detected on the spot, the gradient of soil horizon can be adjusted by adjustable support frame, carry out
The soil permeability detection of different gradient, the suction in soil is effectively have detected using soil water suction detection means, is easy to
Absorbability of the soil for moisture is solved, and electromagnetic wave signal is measured in sensor probe by multiple TDT detection means
It is the one way propagation delay time, moveable by being combined with γ transmission beam methods to realize the medium determination of moisture in soil to be measured
Device detects the different soil moisture content distribution curves for infiltrating the moment, conveniently have detected water content in soil and
Infiltration rate, is worthy to be popularized.
The technical solution adopted for the present invention to solve the technical problems is：A kind of soil moisture detection based on γ transmission beam methods
Device, including workbench, the workbench upper end are provided with two adjustable support frames, the adjustable support frame upper end
Measurement container is provided with, the measurement container left end inserts soil water suction detection means, and the measurement container upper end is equidistant
Several TDT detection means are provided with, the measurement container lower end is provided with γ transmission beam method detection means, and the measurement container is right
End is provided with inlet channel, and 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 is provided at both ends 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 is provided at both ends 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 pressure sensor uses PXM309 type pressure sensors.
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 spacing angle bar is provided with shadow shield.
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 soil moisture detection device based on γ transmission beam methods, including work
Make platform 1, the upper end of workbench 1 is provided between two adjustable support frames 2, described two adjustable support frames 2 and set
It is equipped between measurement container 3, the measurement container 3 left end insertion soil water suction detection means 4, described measurement container 3 upper end etc.
Away from several TDT detection means 5 are provided with, measurement container 3 lower end is provided with γ transmission beam methods detection means 6, the measurement
The right-hand member of container 3 is provided with inlet channel 7, and the upper end of inlet channel 7 is provided with water supply valve 8, and the right-hand member of inlet channel 7 connects
Geneva bottle 9 is connected to, geneva bottle 9 is attached by the inlet channel 7 of hard, and is supported by the inlet channel 7 of hard, horse
The weight for being significantly less weight than workbench 1 of family name's bottle 9, 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 TDT casings upper end connects the RF OUT interface and oscillograph of Network Analyzer 30 respectively
31 CH1 interfaces, middle two contact points 27 are grounded, by the less U-shaped probe 28 in centre, for the U-shaped spy larger with outside
Pin 28 is contrasted so that form electromagnetic wave between two U-shaped probes 28, and shows by oscillograph 31 two U-shaped spies
Waveform between pin 28, to carry out the measure of parameter, the contact point 27 of lower end connects 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
The influence of surrounding enviroment ray can be prevented and improve measurement accuracy and interlayer resolution ratio by covering cover 36, 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 heretofore described permeable rock layer 14 is provided at both ends 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 out 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 (7)
1. a kind of soil moisture detection device based on γ transmission beam methods, including workbench (1), workbench (1) upper end
It is provided with two adjustable support frames (2), it is characterised in that：Adjustable support frame (2) upper end is provided with measurement container
(3), measurement container (3) left end insertion soil water suction detection means (4), described measurement container (3) upper end is equidistantly set
Several TDT detection means (5) are equipped with, described measurement container (3) lower end is provided with γ transmission beam methods detection means (6), described to survey
Amount container (3) right-hand member is provided with inlet channel (7), and inlet channel (7) upper end is provided with water supply valve (8), the water inlet
Pipeline (7) right-hand member is connected with geneva bottle (9)；The γ transmission beam methods detection means (6) includes sliding panel (32), the sliding panel
(32) it is provided at both ends with movable pulley (33), the sliding panel (32) and is provided with radioactive source (34), radioactive source (34) upper end
It is arranged with parallel on the outside of ray probe (35), the ray probe (35) and is provided with lead screen cover (36), the ray probe
(35) it is connected with scaler (37).
2. a kind of soil moisture detection device based on γ transmission beam methods according to claim 1, it is characterised in that：It is described to survey
Measuring container (3) includes transparent quartz tube (10), and transparent quartz tube (10) upper end is provided with several detection jacks (11), institute
State detection jack (11) and be internally provided with sealing-plug (12), the sealing-plug (12) is internally provided with detection perforation (13), described
Transparent quartz tube (10) is internally provided with permeable rock layer (14), and permeable rock layer (14) right-hand member is provided with hydroecium (15), described
Hydroecium (15) right-hand member is provided with hydroecium opening (16), and the hydroecium opening (16) is connected with inlet channel (7).
3. a kind of soil moisture detection device based on γ transmission beam methods according to claim 1, it is characterised in that：The soil
Earth water suction force detection means (4) includes glass tube (17), and glass tube (17) lower end is provided with pot clay end (18), the clay
Head (18) upper end is provided with collecting pipe (19), and collecting pipe (19) upper end is provided with collecting pipe sealing-plug (20), institute
Collecting pipe sealing-plug (20) is stated for truncated cone-shaped structure, collecting pipe (19) upper end is provided with capillary blast pipe (21), institute
State capillary blast pipe (21) and be connected with silica gel joint (22), 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).
4. a kind of soil moisture detection device based on γ transmission beam methods according to claim 1, it is characterised in that：The cunning
It is provided with the outside of dynamic plate (32) inside metal foam layers (46), the metal foam layers (46) and is filled with tungsten resin particle (47).
5. a kind of soil moisture detection device based on γ transmission beam methods according to claim 2, it is characterised in that：It is described
Waterstones (14) is provided at both ends with metal net layer (44).
6. a kind of soil moisture detection device based on γ transmission beam methods according to claim 5, it is characterised in that：The gold
Category stratum reticulare (44) is made of stainless steel material, and the internal mesh of the metal net layer (44) uses diamond-shaped meshes, and the hydroecium is opened
Mouth (16) is internally provided with filtering meshes (45), and the filtering meshes (45) are made of PP cotton materials.
7. a kind of soil moisture detection device based on γ transmission beam methods according to claim 3, it is characterised in that：The pressure
Force snesor (23) uses PXM309 type pressure sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710324730.0A CN107014837A (en) | 2017-05-10 | 2017-05-10 | A kind of soil moisture detection device based on γ transmission beam methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710324730.0A CN107014837A (en) | 2017-05-10 | 2017-05-10 | A kind of soil moisture detection device based on γ transmission beam methods |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107014837A true CN107014837A (en) | 2017-08-04 |
Family
ID=59450117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710324730.0A Withdrawn CN107014837A (en) | 2017-05-10 | 2017-05-10 | A kind of soil moisture detection device based on γ transmission beam methods |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107014837A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109344520A (en) * | 2018-10-16 | 2019-02-15 | 中国科学院寒区旱区环境与工程研究所 | A kind of method for building up of multi-segment soil media remote sensing depth model |
-
2017
- 2017-05-10 CN CN201710324730.0A patent/CN107014837A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109344520A (en) * | 2018-10-16 | 2019-02-15 | 中国科学院寒区旱区环境与工程研究所 | A kind of method for building up of multi-segment soil media remote sensing depth model |
| CN109344520B (en) * | 2018-10-16 | 2022-12-06 | 中国科学院西北生态环境资源研究院 | Method for establishing multi-layered soil medium remote sensing depth model |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103344538B (en) | A kind of unsaturated soil Multifunctional permeameter and method of testing thereof | |
| Nwankwor et al. | Unsaturated and saturated flow in response to pumping of an unconfined aquifer: Field evidence of delayed drainage | |
| Smith et al. | Soil and environmental analysis | |
| Erbach | Measurement of soil bulk density and moisture | |
| CN109100300A (en) | A kind of experimental rig and method for simulating weathered mudstone slope erosion | |
| Provenzano et al. | Assessing field and laboratory calibration protocols for the diviner 2000 probe in a range of soils with different textures | |
| CN108181343A (en) | Freezing Soils hydro-thermal power comprehensive testing method | |
| Evett et al. | Neutron scattering, capacitance, and TDR soil water content measurements compared on four continents | |
| CN108593502A (en) | A kind of groundwater flow modeling device and monitoring method | |
| KR101516971B1 (en) | Device model for testing the performance of radio activity logging system | |
| CN109324170A (en) | The detection method of more scene seepage through soil mass and water salt Transport | |
| Ma et al. | Measuring soil water content through volume/mass replacement using a constant volume container | |
| Gong et al. | An assessment of different methods to determine specific yield for estimating groundwater recharge using lysimeters | |
| Mukhlisin et al. | Techniques for ground-based soil moisture measurement: a detailed overview | |
| CN204649589U (en) | A kind of undisturbed soil sample osmotic coefficient investigating device | |
| CN205280545U (en) | Seepage tests sand post or earth pillar suitable for nuclear magnetic resonance analysis and imaging system | |
| Munoz-Carpena et al. | Field methods for monitoring soil water status | |
| CN207231966U (en) | A kind of comprehensive soil moisture detection device | |
| CN107014837A (en) | A kind of soil moisture detection device based on γ transmission beam methods | |
| CN106950161A (en) | A kind of comprehensive soil moisture detection device | |
| CN203465238U (en) | Fast quantitative detection sensor for soil-water characteristics of unsaturated soil | |
| CN108593889A (en) | Movable type pressure sand gravel leaching liquor migration of element collects monitoring device automatically | |
| Teixeira et al. | Soil water. | |
| Giesel et al. | Water flow calculations by means of gamma absorption and tensiometer field measurements in the unsaturated soil profile | |
| CN207408270U (en) | A kind of original position rainfall infiltration and runoff distribution measuring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170804 |