CN114839228A - High accuracy soil salinity survey device - Google Patents
High accuracy soil salinity survey device Download PDFInfo
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- CN114839228A CN114839228A CN202210722597.5A CN202210722597A CN114839228A CN 114839228 A CN114839228 A CN 114839228A CN 202210722597 A CN202210722597 A CN 202210722597A CN 114839228 A CN114839228 A CN 114839228A
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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
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
- G01N2001/1418—Depression, aspiration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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Abstract
The invention discloses a high-precision soil salinity measuring device which comprises a shell, wherein a suction filter pipe is horizontally arranged on the inner side of the shell, a fixing part is vertically arranged on the inner wall of the shell, one end of the suction filter pipe sequentially penetrates through the fixing part and the surface of the shell, a fixing block is arranged at the other end of the suction filter pipe, a guide rod capable of moving along the vertical direction is arranged in the shell, the fixing block is connected with the guide rod through a connecting rod, the suction filter pipe can be communicated with a negative pressure pipe, a conductivity measuring electrode is arranged in the suction filter pipe, a moisture sensor is connected to the upper side of the suction filter pipe, and the moisture sensor and the conductivity measuring electrode are electrically connected with a controller. The soil leaching liquor is extracted in a timed and layered vacuum mode, the conductivity of the leaching liquor is measured by a salinity probe, the measurement precision of the conductivity of the solution is high, and the performance is good; meanwhile, the soil moisture sensors are arranged to convert soil salinity, and the measurement precision is high.
Description
Technical Field
The invention belongs to the technical field of soil salinity determination, and particularly relates to a high-precision soil salinity determination device.
Background
Soil salinization is one of the main barrier factors for agricultural production development. High-precision soil salinity monitoring equipment is an important method and means for monitoring and predicting spatial-temporal distribution and variation characteristics of soil salinization. Has important significance for preventing secondary salinization, agricultural water-saving irrigation, saline-alkali soil improvement, unconventional water safe utilization and sustainable development of agriculture.
The soil salinity positioning high-precision monitoring technology and equipment are the current industrial problems. Firstly, the existing instruments and equipment are required to be in continuous close contact with soil, but the soil moisture change can cause the soil to shrink and expand, so that the ideal state is difficult to achieve; secondly, the volume of the detected soil is not large enough, the detection result has low representativeness, and the soil is greatly influenced by the spatial variation of the soil (the texture of the soil, the change of the micro-topography and the like) and has poor reproducibility. The existing EM38 earth electric conductivity meter measures the weighted average value of the electric conductivity of 0-150 cm or 0-75 cm soil body, can not measure the soil salinity layer, can not measure the deeper soil salinity, and can not meet the requirement of layered measurement of the soil salinity which is most concerned by scientific research and production practice, especially the monitoring of the root salinity.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a high-precision soil salinity measuring device, soil leaching liquor is extracted in a vacuum mode in a timed and layered mode, a salinity probe is used for measuring the conductivity of the leaching liquor, the measurement precision of the conductivity of a solution is high, and the performance is good; meanwhile, the soil moisture sensors are arranged to convert soil salinity, and the measurement precision is high.
The invention provides the following technical scheme:
the utility model provides a high accuracy soil salinity survey device, includes the casing, the inboard level of casing is provided with the suction filtration pipe, the vertical mounting that is provided with of inner wall of casing, the surface of mounting and casing is run through in proper order to the one end of suction filtration pipe, the other end of suction filtration pipe is provided with the fixed block, be provided with the guide arm that can follow vertical direction and remove in the casing, be connected through the connecting rod between fixed block and the guide arm, the suction filtration pipe can communicate with the negative pressure pipe, be provided with conductivity survey electrode in the suction filtration pipe, the upside of suction filtration pipe is connected with moisture sensor, moisture sensor and conductivity survey electrode all are connected with the controller electricity.
Preferably, be provided with the guide slot in the mounting, the suction filtration pipe is located the guide slot, the suction filtration pipe can remove in the guide slot, the surface of suction filtration pipe is provided with the through-hole, the through-hole is including setting up the first through-hole at suction filtration pipe upper surface and setting up the second through-hole at suction filtration pipe front and back surface.
Preferably, the negative pressure pipe is located in the fixing part, a negative pressure port is formed in the negative pressure pipe, an opening of the negative pressure port is located in the guide groove, an air suction port is formed in the surface of the suction filtration pipe, and when the suction filtration pipe extends out, the air suction port is opposite to the negative pressure port.
Preferably, a guide part is arranged on the inner wall of the shell, the guide rod is positioned in the guide part, and the guide rod can move in the guide part.
Preferably, the upper end of casing is provided with the stand, the stand is connected with the pressure handle, be connected with the briquetting on the pressure handle, the upper end of guide arm is provided with the diaphragm, the briquetting can contact with the diaphragm.
Preferably, the end part of the suction filtration tube is provided with a conical part, the bottom of the inner side of the suction filtration tube is provided with an electrode plate support, the conductivity measuring electrode is arranged on the electrode plate support, and the positions of the second through holes on the front side surface and the rear side surface of the suction filtration tube are higher than the position of the top end of the conductivity measuring electrode.
Preferably, the length of the suction filtration pipe is L, the height of the conical piece is h, and h is greater than or equal to 1/4L in order to enable the suction filtration pipe to be smoothly inserted into the soil.
Preferably, the length of connecting rod is d, and when the suction filtration pipe was located the casing inboard, the contained angle between connecting rod and the guide arm was theta, and theta more than or equal to 45 degrees, the length d of connecting rod satisfies following relation between the height h of conical member: d (1-sin theta) = m.h, wherein m ranges from 1 to 3, and the units of d, h and L are all mm.
Preferably, a filter screen is arranged on the inner wall of the suction filtration pipe and used for filtering muddy water entering the suction filtration pipe.
Preferably, the upper surface afterbody of suction filtration pipe is provided with the check valve, the end of intaking of check valve is connected with first drain pipe, the other end of first drain pipe extends to the bottom of suction filtration pipe, the play water end of check valve is connected with the second drain pipe, the other end of second drain pipe extends to the outside of casing and is connected with the suction pump, the suction pump is used for extracting the solution of suction filtration pipe.
Preferably, the lower surface of casing is provided with the fixed column, the fixed column can insert to soil in, stability when increasing the casing and using.
Preferably, this device still includes the foundation ditch shovel, the foundation ditch shovel is cuboid tubular structure, the lower extreme of foundation ditch shovel is the acute angle shape, the width of the width more than or equal to casing of foundation ditch shovel, the length of the length more than or equal to casing of foundation ditch shovel, the surface of foundation ditch shovel is provided with the scale mark.
Preferably, the high-precision soil salinity determination method comprises the following steps:
s1, digging a foundation pit, namely digging the foundation pit with a certain depth by a foundation pit shovel, wherein the length and the width of the foundation pit are suitable for placing a salinity measuring device;
s2, placing a salinity measuring device, placing the salinity measuring device into the foundation pit, enabling one end with the suction filter tube to be tightly attached to the inner wall of the foundation pit, and filling soil on the other three sides of the salinity measuring device to fix the salinity measuring device;
s3, the suction filtration tube is in place, the pressing handle is pressed, the guide rod moves downwards, and the suction filtration tube extends out and penetrates into soil under the action of the connecting rod;
s4, measuring the water content of the soil through a water sensor, and recording the data;
s5, carrying out vacuum filtration on the soil solution, pumping air in the filtration tube through a negative pressure tube to form negative pressure in the filtration tube, enabling the solution in the soil to enter the filtration tube through a through hole on the filtration tube, and then measuring the conductivity of the soil solution through an electrode;
and S6, determining the salt content of the soil, converting the salt content into the salt content according to a calibration formula of the conductivity and the salt content, and calculating the actual salt content of the soil body by combining the water content of the soil.
Preferably, in the process of digging the foundation pit, the shape of the foundation pit is kept in a vertical state, the bottom of the foundation pit is guaranteed to be smooth, the stability of the salinity measuring device during placement is preferably not affected, and the interval between soil moisture content measurement and soil solution vacuum filtration is 5-10 minutes.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the high-precision soil salinity measuring device, the soil leaching liquor is extracted in a vacuum mode in a timed and layered mode, the conductivity of the leaching liquor is measured by the salinity probe, the measurement precision of the conductivity of the solution is high, and the performance is good; meanwhile, the soil moisture sensors are arranged to convert soil salinity, and the measurement precision is high.
(2) According to the high-precision soil salinity measuring device, the plurality of groups of suction filtration tubes are arranged, and the suction filtration tubes are used for vacuum-pumping soil leaching liquor for soil with different positions and heights, so that layered measurement of soil salinity is realized, and the requirements of layered measurement of soil salinity in scientific research and production practice are met.
(3) According to the high-precision soil salinity measuring device, the water suction pump is arranged, so that the leaching liquor in the suction filtration pipe can be discharged in time, the influence of the leaching liquor on the next measuring result is avoided, and the use process is convenient.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a view showing the construction of the fixing member of the present invention.
FIG. 3 is a schematic view of a suction filtration tube of the present invention.
Fig. 4 is a structural view of the inside of the suction filtration tube of the present invention.
Fig. 5 is a schematic view of the foundation pit shovel structure of the invention.
In the figure: 1. a housing; 2. a suction filter tube; 3. a moisture sensor; 4. a fixing member; 5. a negative pressure tube; 6. a column; 7. pressing the handle; 8. briquetting; 9. a transverse plate; 10. a wire; 11. a guide bar; 12. a guide member; 13. a connecting rod; 14. a fixed block; 15. a negative pressure port; 16. a guide groove; 17. a first through hole; 18. an air extraction opening; 19. a second through hole; 20. a conductivity measuring electrode; 21. an electrode plate support; 22. a conical member; 23. a one-way valve; 24. and (5) shoveling the foundation pit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings. It is to be understood that the described embodiments are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1-5, a high-precision soil salinity measuring device comprises a housing 1, a suction filter tube 2 is horizontally arranged on the inner side of the housing 1, a negative pressure state is formed in the suction filter tube 2 and used for extracting a leaching solution in soil, a fixing member 4 is vertically arranged on the inner wall of the housing 1, one end of the suction filter tube 2 sequentially penetrates through the fixing member 4 and the surface of the housing 1, the fixing member 4 plays a role of supporting the suction filter tube 2, the structural stability of the device is improved, a fixing block 14 is arranged at the other end of the suction filter tube 2, a guide rod 11 capable of moving in the vertical direction is arranged in the housing 1, the fixing block 14 is connected with the guide rod 11 through a connecting rod 13, when the guide rod 11 moves in the vertical direction, the suction filter tube 2 can move leftwards or rightwards under the driving of the connecting rod 13, the suction filter tube 2 can be communicated with the negative pressure tube 5, the negative pressure pipe 5 is connected with an external negative pressure pump, a conductivity measuring electrode 20 is arranged in the suction filter pipe 2, the conductivity measuring electrode 20 is used for measuring the conductivity of a leaching liquor, a water sensor 3 is connected to the upper side of the suction filter pipe 2, the water sensor 3 and the conductivity measuring electrode 20 are both electrically connected with a controller through a lead 10, the water sensor 3 is used for measuring the water content of soil, measuring the conductivity of a soil solution through the electrode, converting the conductivity and the salt content into the salt content according to a calibration formula, and then combining the water content of the soil to calculate the actual salt content of the soil body.
Be provided with guide slot 16 in the mounting 4, suction filter pipe 2 is located guide slot 16, suction filter pipe 2 can remove in guide slot 16, suction filter pipe 2's surface is provided with the through-hole, the through-hole is including setting up first through-hole 17 and the second through-hole 19 of setting surface around suction filter pipe at suction filter pipe upper surface, and the leaching liquor in the soil flows into to suction filter pipe 2 in through-hole.
The suction pipe 5 is located in the fixing part 4, a suction port 15 is formed in the suction pipe 5, an opening of the suction port 15 is located in the guide groove 16, an air suction port 18 is formed in the surface of the suction pipe 2, and when the suction pipe 2 extends out, the air suction port 18 is opposite to the suction port 5. And a sealing gasket is arranged at the air pumping hole 18, so that the sealing property between the negative pressure hole 5 and the air pumping hole 18 is improved. The inner wall of the shell 1 is provided with a guide 12, the guide rod 11 is positioned in the guide 12, and the guide rod 11 can move in the guide 12. The guide 12 guides and limits the guide rod 11.
The upper end of casing 1 is provided with stand 6, stand 6 is connected with presses handle 7, be connected with briquetting 8 on pressing handle 7, press for articulated being connected between handle 7 and the stand 6, press being connected for articulated between handle 7 and the briquetting 8, the upper end of guide arm 11 is provided with diaphragm 9, briquetting 8 can contact with diaphragm 9, when pressing handle 7 down-rotation, briquetting 8 acts on diaphragm 9, can make guide arm 11 remove downwards. The end part of the suction filtration tube 2 is provided with a conical piece 22, the conical piece 22 is convenient for penetrating the suction filtration tube 2 into soil so as to extract soil leaching liquor, the bottom of the inner side of the suction filtration tube 2 is provided with an electrode plate support 21, the conductivity measuring electrode 20 is arranged on the electrode plate support 21, and the positions of the second through holes 19 on the front side surface and the rear side surface of the suction filtration tube 2 are higher than the position of the top end of the conductivity measuring electrode 20 so as to be convenient for storing the leaching liquor. And a filter screen is arranged on the inner wall of the suction filter pipe 2 and is used for filtering muddy water entering the suction filter pipe 2. Suction filtration pipe 2 evenly is provided with a plurality ofly along the vertical direction of 1 inner walls of casing, is convenient for measure soil salinity layer layering.
The upper surface afterbody of suction filter pipe 2 is provided with check valve 23, at the check valve during operation, liquid flow direction in the check valve is for the inside flow direction to the outside from suction filter pipe 2, the end of intaking of check valve 23 is connected with first drain pipe, the other end of first drain pipe extends to the bottom of suction filter pipe 2, the play water end of check valve is connected with the second drain pipe, the other end of second drain pipe extends to the outside of casing 1 and is connected with the suction pump, the suction pump is used for extracting the solution of suction filter pipe 2, avoids measuring the leaching liquor next time and produces the influence, is convenient for draw soil leaching liquor and measure the conductivity of soil leaching liquor many times.
This device still includes foundation ditch shovel 24, the foundation ditch shovel is cuboid tubular structure, the lower extreme of foundation ditch shovel 24 is the acute angle shape, the width more than or equal to casing 1's of foundation ditch shovel 24 width, the length more than or equal to casing 1's of foundation ditch shovel 24 length, the surface of foundation ditch shovel 24 is provided with the scale mark, is convenient for know the degree of depth of shoveling the foundation ditch through the scale mark that sets up. The foundation pit shovel 24 is used for digging out holes corresponding to the device, and the device can be conveniently placed into the holes.
Example two
The length of suction filtration pipe is L, the height of conical member is h, and in order to make suction filtration pipe can insert to soil inboard smoothly, h more than or equal to 1/4L, when h is less than 1/4L, soil is great to the resistance of conical member, and the conical member is difficult for inserting to the inboard of soil. The length of connecting rod is d, when the suction filtration pipe is located the casing inboard, contained angle between connecting rod and the guide arm is theta, theta more than or equal to 45 degrees, and when theta was less than 45 degrees, when the guide arm moved down, the problem that the card went on appears easily between connecting rod and the guide arm, the connecting rod rotates unsmoothly, and when theta more than or equal to 45 degrees, can guarantee that the connecting rod rotates smoothly to make the conical part can pierce the inboard to soil smoothly, the length d of connecting rod satisfies following relation between the height h of conical part: d · (1-sin theta) = m · h, the value range of m is 1-3, the units of d, h and L are all mm, when the value range of m is 1-3, the suction filtration pipe can be guaranteed to completely penetrate into the inner side of the soil by combining the hardness of the soil, the accuracy of measured data is high, when the value range of m is smaller than 1, the length of the suction filtration pipe penetrating into the inner side of the soil is small, the accuracy of the measured data is poor, and when the value range of m is larger than 3, the length of the suction filtration pipe penetrating into the inner side of the soil is large, and the working efficiency is low.
EXAMPLE III
A high-precision soil salinity determination method comprises the following steps:
s1, digging a foundation pit, namely digging the foundation pit with a certain depth by a foundation pit shovel, wherein the length and the width of the foundation pit are suitable for placing a salinity measuring device;
s2, placing a salinity measuring device, placing the salinity measuring device into the foundation pit, enabling one end with the suction filter tube to be tightly attached to the inner wall of the foundation pit, and filling soil on the other three sides of the salinity measuring device to fix the salinity measuring device;
s3, the suction filtration tube is in place, the pressing handle is pressed, the guide rod moves downwards, and the suction filtration tube extends out and penetrates into soil under the action of the connecting rod;
s4, measuring the water content of the soil through a water sensor, and recording the data;
s5, carrying out vacuum filtration on the soil solution, pumping air in the filtration tube through a negative pressure tube to form negative pressure in the filtration tube, enabling the solution in the soil to enter the filtration tube through a through hole on the filtration tube, and then measuring the conductivity of the soil solution through an electrode;
and S6, determining the salt content of the soil, converting the salt content into the salt content according to a calibration formula of the conductivity and the salt content, and calculating the actual salt content of the soil body by combining the water content of the soil.
In the process of digging the foundation pit, the shape of the foundation pit is kept in a vertical state, the bottom of the foundation pit is guaranteed to be smooth, the stability of the salinity measuring device during placement is not affected, and the interval between the measurement of the water content of the soil and the vacuum filtration of the soil solution is 5-10 minutes.
The device obtained through the technical scheme is a high-precision soil salinity determination device, in the process of measuring soil salinity, firstly, a foundation pit is dug out on the ground, the device is placed into the foundation pit, the device is fixed, then, the pressing handle 7 is rotated downwards, the guide rod moves downwards, the suction filtration pipe 2 moves leftwards under the action of the connecting rod 13 and penetrates into the soil layer, the water content of the soil is measured by the water sensor 3, after 5-10 minutes, the negative pressure pump is started to enable the suction filtration pipe to be in a negative pressure environment, the leaching liquor is extracted from the soil, the conductivity of the leaching liquor is measured by the conductivity measurement electrode 20, the conductivity is converted into the salt content according to the conductivity and salt content calibration formula, the water content of the soil is combined, and the actual salt content of the soil body is calculated. The soil leaching liquor is extracted in a timed and layered vacuum mode, the conductivity of the leaching liquor is measured by a salinity probe, the measurement precision of the conductivity of the solution is high, and the performance is good; meanwhile, the soil moisture sensors are arranged to convert soil salinity, and the measurement precision is high.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention; any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A high-precision soil salinity measuring device is characterized by comprising a shell (1), the inner side of the shell (1) is horizontally provided with a suction filter tube (2), the inner wall of the shell (1) is vertically provided with a fixing piece (4), one end of the suction filter tube (2) penetrates through the surface of the fixing piece (4) and the shell (1) in sequence, a fixed block (14) is arranged at the other end of the suction filter tube (2), a guide rod (11) capable of moving along the vertical direction is arranged in the shell (1), the fixed block (14) is connected with the guide rod (11) through a connecting rod (13), the suction filtration tube (2) can be communicated with the negative pressure tube (5), an electric conductivity measuring electrode (20) is arranged in the suction filtration tube (2), the upper side of the suction filtration pipe (2) is connected with a moisture sensor (3), and the moisture sensor (3) and the conductivity measuring electrode (20) are electrically connected with a controller.
2. A high-precision soil salinity measuring device according to claim 1, characterized in that, a guide groove (16) is provided in the fixing member (4), the suction filter tube (2) is located in the guide groove (16), the suction filter tube (2) can move in the guide groove (16), the surface of the suction filter tube (2) is provided with through holes, and the through holes comprise a first through hole (17) provided on the upper surface of the suction filter tube and a second through hole (19) provided on the front and rear surfaces of the suction filter tube.
3. A high-precision soil salinity measuring device according to claim 2, characterized in that, the negative pressure pipe (5) is located in the fixing member (4), the negative pressure pipe (5) is provided with a negative pressure port (15), the opening of the negative pressure port (15) is located in the guide groove (16), the surface of the suction filter pipe (2) is provided with an air suction port (18), and when the suction filter pipe (2) is extended, the air suction port (18) is opposite to the negative pressure port (5).
4. A high accuracy soil salinity measuring device according to claim 1, characterized in that, the guide (12) is provided on the inner wall of the casing (1), the guide rod (11) is located in the guide (12), and the guide rod (11) can move in the guide (12).
5. A high-precision soil salinity measuring device according to claim 1, characterized in that, the upper end of the casing (1) is provided with a column (6), the column (6) is connected with a pressing handle (7), the pressing handle (7) is connected with a pressing block (8), the upper end of the guide rod (11) is provided with a transverse plate (9), and the pressing block (8) can contact with the transverse plate (9).
6. The high-precision soil salinity measuring device according to claim 2, characterized in that the end of the suction filter tube (2) is provided with a conical member (22), the bottom of the inner side of the suction filter tube (2) is provided with an electrode plate support (21), the conductivity measuring electrode (20) is arranged on the electrode plate support (21), and the second through holes (19) on the front and back sides of the suction filter tube (2) are higher than the top of the conductivity measuring electrode (20).
7. A high precision soil salinity measuring device according to claim 1, characterized in that, the inner wall of said suction filter tube (2) is provided with a filter screen, said filter screen is used for filtering the muddy water entering into the suction filter tube (2).
8. A high-precision soil salinity determination method is characterized by comprising the following steps:
s1, digging a foundation pit, namely digging the foundation pit with a certain depth by a foundation pit shovel, wherein the length and the width of the foundation pit are suitable for placing a salinity measuring device;
s2, placing a salinity measuring device, placing the salinity measuring device into the foundation pit, enabling one end with the suction filter tube to be tightly attached to the inner wall of the foundation pit, and filling soil on the other three sides of the salinity measuring device to fix the salinity measuring device;
s3, the suction filtration tube is in place, the pressing handle is pressed, the guide rod moves downwards, and the suction filtration tube extends out and penetrates into soil under the action of the connecting rod;
s4, measuring the water content of the soil through a water sensor, and recording the data;
s5, carrying out vacuum filtration on the soil solution, pumping air in the filtration tube through a negative pressure tube to form negative pressure in the filtration tube, enabling the solution in the soil to enter the filtration tube through a through hole on the filtration tube, and then measuring the conductivity of the soil solution through an electrode;
and S6, determining the salt content of the soil, converting the salt content into the salt content according to a calibration formula of the conductivity and the salt content, and calculating the actual salt content of the soil body by combining the water content of the soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210722597.5A CN114839228A (en) | 2022-06-24 | 2022-06-24 | High accuracy soil salinity survey device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210722597.5A CN114839228A (en) | 2022-06-24 | 2022-06-24 | High accuracy soil salinity survey device |
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| Publication Number | Publication Date |
|---|---|
| CN114839228A true CN114839228A (en) | 2022-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210722597.5A Pending CN114839228A (en) | 2022-06-24 | 2022-06-24 | High accuracy soil salinity survey device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115032034A (en) * | 2022-08-11 | 2022-09-09 | 南通俊朗智能科技有限公司 | Water source gradient sampling device of deep water riverbed |
-
2022
- 2022-06-24 CN CN202210722597.5A patent/CN114839228A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115032034A (en) * | 2022-08-11 | 2022-09-09 | 南通俊朗智能科技有限公司 | Water source gradient sampling device of deep water riverbed |
| CN115032034B (en) * | 2022-08-11 | 2023-11-28 | 南通俊朗智能科技有限公司 | Water source gradient sampling device of deep water riverbed |
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