CN114088776A - Deep profile soil water content distribution monitoring device and system - Google Patents
Deep profile soil water content distribution monitoring device and system Download PDFInfo
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- CN114088776A CN114088776A CN202111570258.1A CN202111570258A CN114088776A CN 114088776 A CN114088776 A CN 114088776A CN 202111570258 A CN202111570258 A CN 202111570258A CN 114088776 A CN114088776 A CN 114088776A
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Abstract
The application provides a deep profile soil water content distribution monitoring device and a system, wherein the system comprises a deep profile soil water content distribution monitoring device, a data acquisition device, a TDR measuring device and a relay device; the deep profile soil water content distribution monitoring device comprises a flexible TDR probe, a probe carrying module and a pressure applying rod; the pressure applying rod is movably inserted between the two probe carrying modules; the probe carrying module comprises an elastic body and a supporting rod, the elastic body is connected to the supporting rod in a segmented mode according to a preset first length, the supporting rod is provided with a wire conveying hole, and the wire conveying hole is used for accommodating a coaxial cable; the flexible TDR probe comprises a plurality of parallel flexible metal foil strips, and the metal foil strips are adhered to the surface of the elastomer. The device is convenient to install; the depth can be measured; the flexible TDR probe is tightly attached to soil to be measured by means of pressure, the TDR probe can still be in close contact with the soil after the plastic soil expands or contracts, soil disturbance is small, and reliability and accuracy of a measuring result are improved.
Description
Technical Field
The application relates to soil water content technical field, especially relates to a dark section soil water content distribution monitoring devices and system.
Background
The deep soil moisture plays an important role in the processes of plant growth, water circulation, geological disasters, soil quality evolution and the like, and the real-time and dynamic monitoring of the deep profile soil moisture content can provide important parameters for field monitoring and scientific research of agriculture, forestry, water conservancy, geology, ecology and the like.
At present, the method for measuring the water content distribution of deep-section soil mainly comprises an instrument measuring method, namely a Time Domain Reflectometry (TDR) method in the instrument measuring method, wherein a casing is mainly installed firstly, a special TDR probe is periodically inserted into different depths to measure the water content of the soil, or the TDR probes are installed at the different depths of the casing to carry out positioning continuous monitoring.
However, the TDR method is used to measure the water content of deep soil, the TDR probe can be inserted into soil or attached to the surface of the soil to be measured to measure the water content of the soil, a special tool needs to be adopted to carefully install the casing pipe, the TDR is shallow in monitoring depth through the casing pipe, and the gap between the casing pipe and the soil causes large measurement error.
Disclosure of Invention
The application provides a deep section soil water content distribution monitoring device and system to the solution adopts the TDR method to survey deep soil water content, and is shallower through sleeve pipe monitoring depth, and the space between sleeve pipe and the soil leads to measuring error big technical problem.
In a first aspect, an embodiment of the application provides a deep profile soil water content distribution monitoring device, which includes a flexible TDR probe, a probe carrying module and a pressure applying rod;
the pressure applying rod is movably inserted between the two probe carrying modules;
the probe carrying module comprises an elastic body and a supporting rod, the elastic body is connected to the supporting rod in a segmented mode according to a preset first length, the supporting rod is provided with a wire conveying hole, and the wire conveying hole is used for accommodating a coaxial cable;
the flexible TDR probe comprises a plurality of parallel flexible metal foil strips, and the metal foil strips are adhered to the surface of the elastomer.
In one possible implementation, the flexible TDR probe is composed of 3 parallel flexible metal foil strips, which are a first metal foil strip, a second metal foil strip and a third metal foil strip;
the second metal foil strip is positioned between the first metal foil strip and the third metal foil strip;
the second metal foil strip is connected with the inner conductor of the coaxial cable, and the first metal foil strip and the third metal foil strip are connected with the outer conductor of the coaxial cable.
In a possible implementation manner, a preset gap is formed between each section of the elastic body, and the preset gap is used for accommodating deformation of the elastic body.
In a possible implementation manner, the elastic body is adhered to the supporting rod in sections according to a preset first length.
In a possible implementation manner, the probe carrying module is divided into a plurality of sections according to a preset second length, and the sections are movably connected with each other.
In one possible implementation, the length of the strut is longer than the drilling depth.
In a second aspect, an embodiment of the present application provides a deep profile soil water content distribution monitoring system, which includes a deep profile soil water content distribution monitoring device, a data acquisition device, a TDR measurement device, and a relay device;
the TDR measuring device is electrically connected with the data acquisition device and the relay device; the relay device is connected with the deep profile soil water content distribution monitoring device through a coaxial cable;
the data acquisition device is used for acquiring and storing data;
the TDR measuring device is used for measuring the water content and the conductivity of the soil;
and the relay device is used for controlling the measuring position according to the control instruction.
In one possible implementation manner, the deep profile soil water content distribution monitoring device comprises a flexible TDR probe, a probe carrying module and a pressure applying rod;
the pressure applying rod is movably inserted between the two probe carrying modules;
the probe carrying module comprises an elastic body and a supporting rod, the elastic body is connected to the supporting rod in a segmented mode according to a preset first length, the supporting rod is provided with a wire conveying hole, and the wire conveying hole is used for accommodating a coaxial cable;
the flexible TDR probe comprises a plurality of parallel flexible metal foil strips, and the metal foil strips are adhered to the surface of the elastomer.
In one possible implementation, the flexible TDR probe is composed of 3 parallel flexible metal foil strips, which are a first metal foil strip, a second metal foil strip and a third metal foil strip; the second metal foil strip is positioned between the first metal foil strip and the third metal foil strip; the second metal foil strip is connected with the inner conductor of the coaxial cable, and the first metal foil strip and the third metal foil strip are connected with the outer conductor of the coaxial cable.
In a possible implementation manner, the elastic body is adhered to the supporting rod in sections according to a preset first length; the probe carrying module is divided into a plurality of sections according to a preset second length, and the sections are movably connected.
According to the technical scheme, the device and the system for monitoring the water content distribution of the deep profile soil comprise a deep profile soil water content distribution monitoring device, a data acquisition device, a TDR measuring device and a relay device; the deep profile soil water content distribution monitoring device comprises a flexible TDR probe, a probe carrying module and a pressure applying rod; the pressure applying rod is movably inserted between the two probe carrying modules; the probe carrying module comprises an elastic body and a supporting rod, the elastic body is connected to the supporting rod in a segmented mode according to a preset first length, the supporting rod is provided with a wire conveying hole, and the wire conveying hole is used for accommodating a coaxial cable; the flexible TDR probe comprises a plurality of parallel flexible metal foil strips, and the metal foil strips are adhered to the surface of the elastomer. The device is convenient to install; the depth can be measured; the flexible TDR probe is tightly attached to soil to be measured by means of pressure, the TDR probe can still be in close contact with the soil after the plastic soil expands or contracts, soil disturbance is small, and reliability and accuracy of a measuring result are improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a deep profile soil water content distribution monitoring device before installation of a pressure application rod according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a deep profile soil water content distribution monitoring device after installation of a pressure application rod according to an embodiment of the present disclosure;
FIG. 3 is a side view of a deep profile soil water content profile monitoring apparatus according to an embodiment of the present application;
FIG. 4 is a schematic diagram illustrating a deep profile soil water content distribution monitoring system according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of a system for monitoring the water content distribution of deep-profile soil according to an embodiment of the present application;
wherein: 1-soil; 2, drilling; 3-a data acquisition device; 4-TDR measuring device; 5-a relay device; 6-coaxial cable; 7-a deep profile soil water content distribution monitoring device; 10-a probe carrying module; 11-an elastomer; 12-a support bar; 121-transmission holes; 20-flexible TDR probe; 30-a pressure applying rod.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The existing method for measuring the water content distribution of deep-section soil mainly comprises a soil-taking and drying method and an instrument measuring method. Soil samples at different depths are collected by soil drills or other soil taking tools at regular intervals, and the soil samples are taken back to a laboratory for drying to measure the water content of the soil in different soil layers. The method is complicated to operate and cannot be used for measuring the dynamic change of the soil water content. The instrument positioning monitoring comprises a neutron method, a Time Domain Reflectometry (TDR) method, a Frequency Domain Reflectometry (FDR) method and the like; wherein, FDR method measuring error is great, and the instrument of neutron method can produce radiation injury to measurement personnel, and when adopting the TDR method to survey deep soil water content, the TDR probe can insert soil or attached survey soil water content at the soil surface that awaits measuring, and advantages such as TDR method survey precision height, the automatic monitoring of being convenient for obtain the wide application, mainly through two kinds of modes: digging a trench or a deep well, inserting a TDR probe into soil at different depths, and when the measuring depth is deeper, the operation is complex, the disturbance to natural soil is large, and the reliability of the measuring result is still difficult to ensure even though the soil is backfilled; or a sleeve is installed firstly, and the special TDR probe is extended into the position with different depths to measure the water content of the soil at regular intervals, or the TDR probe is installed at the position with different depths of the sleeve to carry out positioning continuous monitoring. Because the clearance between sleeve pipe and soil can produce great influence to the survey result, need adopt specialized tool carefully to install the sleeve pipe, and sleeve pipe length is limited, is difficult to survey deeper soil water content.
In order to solve the above problem, the embodiment of the application provides a deep section soil water content distribution monitoring devices and system, pastes flexible TDR probe on the elastomer surface, and the rethread pressure application pole exerts pressure to the elastomer, forces the TDR probe closely attached to the soil that awaits measuring, carries out the survey of volume soil water content, soil conductivity.
Some embodiments of this application provide a dark section soil water content distribution monitoring devices, as shown in fig. 1, fig. 2, dark section soil water content distribution monitoring devices includes flexible TDR probe 20, probe carrying module 10, pressure applying rod 30. One end of the flexible TDR probe 20 is connected with the probe carrying module 10.
The flexible TDR probe 20 includes a plurality of parallel flexible metal foil strips.
In some embodiments, the flexible TDR probe 20 is comprised of 3 parallel flexible metal foil strips, a first metal foil strip, a second metal foil strip, and a third metal foil strip; the second metal foil strip is positioned between the first metal foil strip and the third metal foil strip, and the metal foil strips can be made of stainless steel, aluminum, copper and other metal materials.
The second metal foil strip is connected with the inner conductor of the coaxial cable 6, and the first metal foil strip and the third metal foil strip are connected with the outer conductor of the coaxial cable 6.
As shown in fig. 3, the probe-mounted module 10 includes an elastic body 11 and a support rod 12. The elastic bodies 11 are connected to the supporting rod 12 in sections according to a preset first length, and a preset gap is formed between each section of the elastic bodies 11 and used for accommodating deformation of the elastic bodies 11.
In some embodiments, the elastic body 11 may be adhered to the support rod 12 in sections according to a predetermined first length.
The elastomer 11 may be made of rubber, latex or other elastic material, and has a mushroom-shaped cross section, and the radius of the arc surface is larger than that of the drill hole 2.
The supporting rod 12 is made of rigid material and can be made of plastic such as PVC, and the supporting rod 12 is provided with a transmission line hole 121 for accommodating the coaxial cable 6 and the relay device 5. The length of the support rods 12 is longer than the depth of the bore 2.
The pressure applying rod 30 is movably inserted between the two probe carrying modules 10 and is used for applying pressure to the probe carrying modules 10, so that the flexible TDR probe 20 is in close contact with the wall of the drill hole 2 in the soil 1. The pressing rod 30 is made of rigid material, can be made of plastic such as PVC, and can also be made of wood, and the length thereof is the same as the total length of the probe mounting module 10. The probe mounting modules 10 are provided on both sides of the pressing bar 30.
Set up two sets of soil water content check points in 2 relative positions in drilling, two sets of probes carry on module 10 and flexible TDR probe 20 promptly, can contrast each other, guarantee the reliability of result.
In some embodiments, for convenience of carrying and installation, the probe carrying module 10 may be made into a segmented form according to a predetermined second length, and the segments may be directly connected by means of a snap, a screw, or the like, and when the probe carrying module is operated in the field, the probe carrying module may be quickly assembled into a whole segment.
The installation method of the deep profile soil water content distribution monitoring device comprises the following steps:
according to the preset depth, drilling the drill hole 2 by using an earth drill or other tools, avoiding compacting the soil 1 on the wall of the drill hole 2 when drilling the drill hole 2, and drilling the drill hole 2 by using drills in the forms of a Dutch drill, an auger drill and the like; the pore size was about 10 cm.
Placing two sets of probe-carrying modules 10 with flexible TDR probes 20 into the borehole 2 in relative positions;
a pressure applying rod 30 is plugged between the two groups of probe carrying modules 10 from top to bottom to apply pressure to the elastic body 11, so that the flexible TDR probe 20 is tightly attached to the wall of the drill hole 2; in order to facilitate the plugging of the pressure applying rod 30, lubricating oil can be coated on the surfaces of the pressure applying rod 30 and the support rod 12 to reduce the friction force between the pressure applying rod 30 and the support rod 12;
and backfilling soil in other gaps of the drill hole 2, and performing layered compaction.
According to the technical scheme, the deep profile soil water content distribution monitoring device comprises a flexible TDR probe, a probe carrying module and a pressure applying rod, wherein the flexible TDR probe is arranged on the probe carrying module; the flexible TDR probe consists of 3 parallel flexible metal foil strips, namely a first metal foil strip, a second metal foil strip and a third metal foil strip; the second metal foil strip is positioned between the first metal foil strip and the third metal foil strip, and the metal foil strips can be made of stainless steel, aluminum, copper and other metal materials. The second metal foil strip is connected with the inner conductor of the coaxial cable, and the first metal foil strip and the third metal foil strip are connected with the outer conductor of the coaxial cable. The probe carrying module comprises an elastic body and a supporting rod. The flexible TDR probe is tightly attached to soil to be measured by means of pressure, the TDR probe can still be in close contact with the soil after the plastic soil expands or contracts, soil disturbance is small, and reliability and accuracy of a measuring result are improved.
Some embodiments of the present application provide a deep profile soil water content distribution monitoring system, as shown in fig. 4, including a deep profile soil water content distribution monitoring device 7, a data acquisition device 3, a TDR measurement device 4, and a relay device 5; the TDR measuring device 4 is electrically connected with the data acquisition device 3 and the relay device 5; the relay device 5 is connected with the deep profile soil water content distribution monitoring device through a coaxial cable 6.
In some embodiments, the TDR measurement device 4 and the relay device 5 are connected by a coaxial cable 6.
The data acquisition device 3 is used for acquiring and storing data and also can be used for controlling measurement.
In some embodiments, the data acquisition device 3 may be a data acquisition card or a data acquisition device.
The TDR measuring device 4 is used for measuring the water content and the conductivity of the soil; the TDR measuring device 4 can also measure the conductivity distribution of deep profile soil, analyze the migration of soil solute, and can also install thermocouples at different depth positions to monitor the temperature change of the soil. Can be widely applied to flood prevention, drought resistance, hydrology, meteorology, rock and soil and other aspects.
The relay device 5 is used for controlling the measuring position according to the control instruction. A large amount of point distribution monitoring can be carried out through the relay device 5, and deep profile multipoint detection is realized.
As shown in fig. 5, the deep profile soil water content distribution monitoring device includes a flexible TDR probe 20, a probe carrying module 10, and a pressure applying rod 30. One end of the flexible TDR probe 20 is connected with the probe carrying module 10.
The flexible TDR probe 20 includes a plurality of parallel flexible metal foil strips.
In some embodiments, the flexible TDR probe 20 is comprised of 3 parallel flexible metal foil strips, a first metal foil strip, a second metal foil strip, and a third metal foil strip; the second metal foil strip is positioned between the first metal foil strip and the third metal foil strip, and the metal foil strips can be made of stainless steel, aluminum, copper and other metal materials.
The second metal foil strip is connected with the inner conductor of the coaxial cable 6, and the first metal foil strip and the third metal foil strip are connected with the outer conductor of the coaxial cable 6.
The probe-mounted module 10 includes an elastic body 11 and a support rod 12. The elastic bodies 11 are connected to the supporting rod 12 in sections according to a preset first length, and a preset gap is formed between each section of the elastic bodies 11 and used for accommodating deformation of the elastic bodies 11.
In some embodiments, the elastic body 11 may be adhered to the support rod 12 in sections according to a predetermined first length.
The elastomer 11 may be made of rubber, latex or other elastic material, and has a mushroom-shaped cross section, and the radius of the arc surface is larger than that of the drill hole 2.
The supporting rod 12 is made of rigid material and can be made of plastic such as PVC, and the supporting rod 12 is provided with a transmission line hole 121 for accommodating the coaxial cable 6 and the relay device 5. The length of the support rods 12 is longer than the depth of the bore 2.
The pressure applying rod 30 is movably inserted into the probe-mounted module 10, and is used for applying pressure to the probe-mounted module 10, so that the flexible TDR probe 20 is in close contact with the wall of the borehole 2 of the soil. The pressing rod 30 is made of rigid material, can be made of plastic such as PVC, and can also be made of wood, and the length thereof is the same as the total length of the probe mounting module 10. The probe mounting modules 10 are provided on both sides of the pressing bar 30.
In some embodiments, for convenience of carrying and installation, the probe carrying module 10 may be made into a segmented form according to a predetermined second length, and the segments may be directly connected by means of a snap, a screw, or the like, and when the probe carrying module is operated in the field, the probe carrying module may be quickly assembled into a whole segment.
In some embodiments, each probe can be integrated with a TDR measurement device that is no longer limited by the length of the coaxial cable.
In some embodiments, an FDR measurement device may be employed instead of the TDR measurement device 4.
In some embodiments, the shape of the elastic body 11 may be other shapes, and is not limited to the shape shown in the drawings of the present application.
In some embodiments, the rigid pressure applying rod 30 may be changed to be hydraulic or pneumatic.
The measuring method of the deep profile soil water content distribution monitoring system is based on a TDR method to measure the soil water content. The TDR measuring device 4 transmits electromagnetic wave pulses to the flexible TDR probe 20 through the coaxial cable 6, measures the time required for the electromagnetic waves to travel back and forth in the flexible TDR probe 20, and obtains the dielectric constant of the medium in which the flexible TDR probe 20 is located.
Among the soil components, the dielectric constant of soil particles is 3 to 5, the dielectric constant of air is 1, and the dielectric constant of water is about 80, so that the variation of the dielectric constant of soil is mainly dependent on the water content of soil, and the water content of soil can be estimated by the dielectric constant. The flexible TDR probe 20 is inserted into a medium or attached to the surface of the medium to be measured, so that the water content of the soil can be measured, when the flexible TDR probe 20 is attached to the surface of the soil, the flexible TDR probe 20 needs to be closely attached to the soil, and a gap between the flexible TDR probe and the soil affects a measurement result. In the application, the flexible TDR probe 20 is made of a flexible metal foil tape and is adhered to the surface of the elastic body 11, and after the pressure applying rod 30 is plugged in, pressure can be generated on the elastic body 11 to force the flexible TDR probe 20 to be tightly adhered to the wall of the borehole 2.
According to the technical scheme, the application provides a deep profile soil water content distribution monitoring system, which comprises a deep profile soil water content distribution monitoring device, a data acquisition device, a TDR measuring device and a relay device; the deep profile soil water content distribution monitoring device comprises a flexible TDR probe, a probe carrying module and a pressure applying rod; one end of the flexible TDR probe is connected with the probe carrying modules, and the pressure applying rod is movably inserted between the two probe carrying modules; the probe carrying module comprises an elastic body and a supporting rod, the elastic body is connected to the supporting rod in a segmented mode according to a preset first length, the supporting rod is provided with a wire conveying hole, and the wire conveying hole is used for accommodating a coaxial cable; the flexible TDR probe comprises a plurality of parallel flexible metal foil strips, and the metal foil strips are adhered to the surface of the elastomer. The device is convenient to install; the depth can be measured; the flexible TDR probe is tightly attached to soil to be measured by means of pressure, the TDR probe can still be in close contact with the soil after the plastic soil expands or contracts, soil disturbance is small, and reliability and accuracy of a measuring result are improved.
The above-mentioned contents are only for explaining the technical idea of the present application, and the protection scope of the present application is not limited thereby, and any modification made on the basis of the technical idea presented in the present application falls within the protection scope of the claims of the present application.
Additionally, the order in which elements and sequences of the processes described herein are processed, the use of alphanumeric characters, or the use of other designations, is not intended to limit the order of the processes and methods described herein, unless explicitly claimed. While various presently contemplated embodiments have been discussed in the foregoing disclosure by way of example, it should be understood that such detail is solely for that purpose and that the appended claims are not limited to the disclosed embodiments, but, on the contrary, are intended to cover all modifications and equivalent arrangements that are within the spirit and scope of the embodiments herein. For example, although the system components described above may be implemented by hardware devices, they may also be implemented by software-only solutions, such as installing the described system on an existing server or mobile device.
Similarly, it should be noted that in the preceding description of embodiments of the application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.
The entire contents of each patent, patent application publication, and other material cited in this application, such as articles, books, specifications, publications, documents, and the like, are hereby incorporated by reference into this application. Except where the application is filed in a manner inconsistent or contrary to the present disclosure, and except where the claim is filed in its broadest scope (whether present or later appended to the application) as well. It is noted that the descriptions, definitions and/or use of terms in this application shall control if they are inconsistent or contrary to the statements and/or uses of the present application in the material attached to this application.
Claims (9)
1. A deep profile soil water content distribution monitoring device is characterized by comprising a flexible TDR probe, a probe carrying module and a pressure applying rod;
the pressure applying rod is movably inserted between the two probe carrying modules;
the probe carrying module comprises an elastic body and a supporting rod, the elastic body is connected to the supporting rod in a segmented mode according to a preset first length, the supporting rod is provided with a wire conveying hole, and the wire conveying hole is used for accommodating a coaxial cable;
the flexible TDR probe comprises a plurality of parallel flexible metal foil strips, and the metal foil strips are adhered to the surface of the elastomer.
2. The deep profile soil water content distribution monitoring device of claim 1, wherein the flexible TDR probe is composed of 3 parallel flexible metal foil strips, namely a first metal foil strip, a second metal foil strip and a third metal foil strip;
the second metal foil strip is positioned between the first metal foil strip and the third metal foil strip;
the second metal foil strip is connected with the inner conductor of the coaxial cable, and the first metal foil strip and the third metal foil strip are connected with the outer conductor of the coaxial cable.
3. The device for monitoring the water content distribution of the deep profile soil as claimed in claim 1, wherein a preset gap is formed between each section of the elastic body for accommodating the deformation of the elastic body.
4. The device for monitoring the water content distribution of deep profile soil according to claim 1, wherein the elastic body is adhered to the supporting rod in a segmented manner according to a preset first length.
5. The deep profile soil water content distribution monitoring device according to claim 1, wherein the probe carrying module is divided into a plurality of sections according to a preset second length, and the sections are movably connected with each other.
6. A deep profile soil water content distribution monitoring system is characterized by comprising a deep profile soil water content distribution monitoring device, a data acquisition device, a TDR measuring device and a relay device;
the TDR measuring device is electrically connected with the data acquisition device and the relay device; the relay device is connected with the deep profile soil water content distribution monitoring device through a coaxial cable;
the data acquisition device is used for acquiring and storing data;
the TDR measuring device is used for measuring the water content and the conductivity of the soil;
and the relay device is used for controlling the measuring position according to the control instruction.
7. The deep profile soil water content distribution monitoring system of claim 6, wherein the deep profile soil water content distribution monitoring device comprises a flexible TDR probe, a probe carrying module and a pressure applying rod;
the pressure applying rod is movably inserted between the two probe carrying modules;
the probe carrying module comprises an elastic body and a supporting rod, the elastic body is connected to the supporting rod in a segmented mode according to a preset first length, the supporting rod is provided with a wire conveying hole, and the wire conveying hole is used for accommodating a coaxial cable;
the flexible TDR probe comprises a plurality of parallel flexible metal foil strips, and the metal foil strips are adhered to the surface of the elastomer.
8. The deep profile soil water content distribution monitoring system of claim 6, wherein the flexible TDR probe is composed of 3 parallel flexible metal foil strips, namely a first metal foil strip, a second metal foil strip and a third metal foil strip;
the second metal foil strip is positioned between the first metal foil strip and the third metal foil strip;
the second metal foil strip is connected with the inner conductor of the coaxial cable, and the first metal foil strip and the third metal foil strip are connected with the outer conductor of the coaxial cable.
9. The system for monitoring the water content distribution of deep profile soil according to claim 6, wherein the elastic body is adhered to the supporting rod in a segmented manner according to a preset first length;
the probe carrying module is divided into a plurality of sections according to a preset second length, and the sections are movably connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111570258.1A CN114088776A (en) | 2021-12-21 | 2021-12-21 | Deep profile soil water content distribution monitoring device and system |
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| CN202111570258.1A CN114088776A (en) | 2021-12-21 | 2021-12-21 | Deep profile soil water content distribution monitoring device and system |
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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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2021
- 2021-12-21 CN CN202111570258.1A patent/CN114088776A/en active Pending
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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