CN112362972B - Spiral electrode resistivity probe rod and monitoring method thereof - Google Patents
Spiral electrode resistivity probe rod and monitoring method thereof Download PDFInfo
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- CN112362972B CN112362972B CN202011258781.6A CN202011258781A CN112362972B CN 112362972 B CN112362972 B CN 112362972B CN 202011258781 A CN202011258781 A CN 202011258781A CN 112362972 B CN112362972 B CN 112362972B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
Abstract
The invention discloses an electrical method based spiral electrode resistivity probe rod and a monitoring method thereof. The probe rod structure design provided by the scheme can realize manual screwing in of soil through the design of the threaded electrode after the soil sampler is drilled; after the penetration of the probe rod is finished, the spiral electrode is converted into the annular electrode distributed at equal intervals through the electrode resetting device of the probe rod, so that long-term in-situ observation is finished, the time and the cost for equipment installation are greatly reduced through the design of the device, and the installation efficiency is improved; and the resistivity gradient of the soil can be truly reflected, the further development of the soil in-situ monitoring technology is promoted, and necessary technical and data support is provided for researching the evolution mechanism of seawater invasion and soil salinization and disaster prevention.
Description
Technical Field
The invention belongs to the field of geological in-situ monitoring, and particularly relates to an electrical method type spiral electrode resistivity probe rod and a monitoring method thereof.
Background
The seawater invasion has great harm to agriculture, industrial production and population health, and the seawater invasion phenomenon in local coastal areas of China is aggravated along with economic development in recent years. In order to further master the seawater invasion situation of the coastal region, currently, an in-situ monitoring probe rod based on the electric method principle is mostly adopted to carry out long-term monitoring, prevention and control on the seawater invasion of the coastal region: the detecting rods are arranged in a grid mode in a monitoring area, a monitoring section is formed by a vertical distribution dynamic change process of the conductivity in the specified depth of the monitoring point, a distribution diagram of the conductivity of the underground medium of the monitoring section is obtained, and the development conditions of seawater invasion and soil salinization are analyzed through the change of the spatial distribution diagram of the conductivity at different moments.
The invention patent with the publication number of CN106802132B discloses a penetration type multifunctional submarine sediment in-situ observation probe rod; a new patent with publication number CN211528269U discloses a resistivity probe and a measuring system. The existing probe rod for monitoring the resistivity of the soil for a long time does not have a mature penetration mode, the monitoring points are generally excavated to the monitoring depth by the aid of an excavator or manpower during distribution, and then backfilling is carried out after the probe rod is placed, so that huge manpower and material resources are consumed, and the construction difficulty is increased; meanwhile, the excavation backfill of the alignment can disturb the soil body and destroy the natural structure of the soil body, and is not beneficial to in-situ monitoring of the area.
Disclosure of Invention
The invention provides a spiral electrode resistivity probe rod and a monitoring method thereof, aiming at overcoming the defects of damage of an in-situ soil body structure, difficulty in construction and the like caused by soil body excavation during the laying construction of the conventional measuring device, and improving the laying efficiency of the device.
The invention is realized by adopting the following technical scheme: a spiral electrode resistivity probe rod comprises a spiral probe rod and an auxiliary device thereof, wherein the auxiliary device comprises an electrode restoring device and a penetration device, and the penetration device is used for assisting the spiral probe rod to rotatably penetrate into soil;
the spiral probe rod comprises a conical tip probe, a probe rod body and a probe rod tail end, wherein the conical tip probe, the probe rod body and the probe rod tail end are sequentially connected from bottom to top; the spiral electrode module comprises a module body and spiral electrodes arranged around the module body, the thread pitch of each spiral electrode is as high as that of the spiral electrode module, namely the spiral electrode of each spiral electrode module is a whole circle, the top end point of each spiral electrode is rigidly connected with the module body, and electrode transmission fixing pieces are arranged at the half thread pitch of each spiral electrode and the bottom end point of each spiral electrode; the side wall of the module main body is provided with a sliding groove, the electrode transmission fixing pieces are positioned in the sliding groove, and the upper and lower adjacent transmission fixing pieces are connected through a transmission cable;
the electrode resetting device is arranged at the tail end of the probe and used for resetting the spiral electrode into a closed annular electrode in a measuring state, and the electrode resetting device is connected with the transmission cable.
Furthermore, the electrode restoration device comprises a fixed chassis, and a pulley block and a driving runner which are arranged on the fixed chassis, wherein three mounting plates are arranged on the fixed chassis and used for mounting the fixed pulley block and the driving runner, the pulley block comprises a first pulley block and a second pulley block, and the driving runner comprises a first driving runner and a second driving runner;
the diameter of the first driving rotating wheel is equal to the height of the spiral electrode module, the radius of the second driving rotating wheel is one half of that of the first driving rotating wheel, two connecting holes are formed in the fixing base plate and correspond to the sliding grooves, two transmission cables which are connected with the bottom end point of the spiral electrode and the half-pitch position of the spiral electrode respectively and correspondingly penetrate through the two connecting holes, the transmission cable which is connected with the electrode transmission fixing piece at the bottom end point of the spiral electrode is connected with the first driving rotating wheel through a first pulley block, and the transmission cable which is connected with the electrode transmission fixing piece at the half-pitch position of the spiral electrode is connected with the second driving rotating wheel through a second pulley block;
the electrode transmission fixing piece is connected with the transmission cable, the electrode transmission fixing piece slides up and down along the sliding groove under the control of the transmission cable, the transmission cables on the upper and lower adjacent spiral electrode modules are connected in sequence, and the spiral electrode is controlled to deform through the sliding of the two electrode transmission fixing pieces at the middle part and the bottom part of the spiral electrode to form a closed annular electrode.
Furthermore, the module main body is provided with a mounting groove and a connecting hole which penetrate through the thickness direction of the module main body, a lead for connecting and connecting the spiral electrodes is placed in the mounting groove, and a fixing rod is inserted into the connecting hole to fix each spiral electrode module.
Furthermore, a first handle is arranged on the first driving rotating wheel, a second handle is arranged on the second driving rotating wheel, the two driving rotating wheels rotate for the same number of turns in a hand-cranking or motor-driven mode, the rotating electrode is converted into a complete annular electrode perpendicular to the axial direction of the probe rod, and the first handle and the second handle are fixedly connected through a connecting rod in order to achieve synchronous control.
Furthermore, the tail end of the probe rod comprises a base and a watertight plug arranged on the side face of the base, the base is a regular polygon matched with the socket wrench, clamping is facilitated, the watertight plug is connected with the spiral electrode through a lead, and the watertight plug has good sealing performance and ensures stability after being connected with a data line.
Further, the penetrating device comprises a sleeve and a crowbar, a through hole allowing the crowbar to penetrate through is formed in the sleeve, the inner diameter of the sleeve is matched with the outer diameter of the base at the tail end of the probe rod, and the sleeve can be rotated through the crowbar to enable the spiral probe rod to penetrate into the soil in a rotating mode.
Furthermore, the cone tip probe is made of stainless steel materials, is installed at the head of the probe rod body, and adopts a cone tip form so that the probe rod can penetrate into the soil body in a rotating mode.
Furthermore, the electrode transmission fixing piece is made of insulating materials and is rigidly connected with the spiral electrode at a connecting point.
Furthermore, the module main body is made of insulating nylon materials in a pouring mode.
The invention also provides a monitoring method of the resistivity probe rod of the spiral electrode, which comprises the following steps:
(1) assembling the spiral probe rod according to the monitoring depth, and forming the spiral probe rod by connecting a plurality of spiral electrode modules;
(2) taking a shallow hole with the diameter larger than that of the spiral probe rod at a monitoring point, installing a sleeve at the tail end of the spiral probe rod and placing the head of the probe rod in the shallow hole;
(3) inserting a crowbar into a socket spanner to rotate, enabling a spiral probe rod to penetrate into the soil body along with rotation until the tail end of the probe rod is close to the surface of the soil, and taking down the crowbar and the socket;
(4) the electrode resetting device is fixedly arranged at the tail end of the probe rod and is connected with a transmission cable of the probe rod electrode;
(5) rotating the first driving rotating wheel and the second driving rotating wheel for a circle according to the length of the spiral probe rod; the transmission cable controls the spiral electrodes of all the electrode modules to be converted into annular electrodes, and finally the annular electrodes which are perpendicular to the axial direction of the probe rod and are arranged at equal intervals are formed;
(6) after the conversion of the electrode form is completed, cutting off the transmission cable, and taking down the electrode recovery device;
(7) and connecting a data line through the watertight plug, and starting in-situ monitoring by debugging equipment.
Compared with the prior art, the invention has the advantages and positive effects that:
the probe rod structure design provided by the scheme can realize manual screwing in of soil through the design of the threaded electrode after the soil sampler is drilled; after the probe rod is penetrated, the spiral electrode is converted into annular electrodes distributed at equal intervals through an electrode resetting device of the probe rod, and long-term in-situ observation is completed. The design of the device greatly reduces the time and cost for installing the equipment and improves the installation efficiency; and the resistivity gradient of the soil can be truly reflected, the further development of the soil in-situ monitoring technology is promoted, and necessary technical and data support is provided for researching the evolution mechanism of seawater invasion and soil salinization and disaster prevention.
Drawings
FIG. 1 is a schematic structural diagram of a spiral probe according to an embodiment of the present invention;
FIG. 2 is a schematic view of a structure of the spiral probe and the penetration device according to the embodiment of the present invention;
FIG. 3 is a schematic view of a spiral probe and an electrode restoring apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a spiral electrode module according to an embodiment of the present invention, wherein (a) is a penetration mode and (b) is a measurement mode;
FIG. 5 is a schematic diagram of a connection structure of adjacent spiral electrode modules according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of the tail end of the probe according to the embodiment of the present invention;
FIG. 7 is a schematic structural diagram of an electrode recovery apparatus according to an embodiment of the present invention;
fig. 8 is a schematic diagram illustrating the testing principle of the electrode according to the embodiment of the present invention.
Detailed Description
In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and thus, the present invention is not limited to the specific embodiments disclosed below.
Example 1, a helical electrode resistivity probe, as shown in fig. 1-3, comprises a helical probe 1 and its auxiliary devices, including an electrode restoration device 2 and a penetration device 3;
the spiral probe rod 1 comprises a conical tip probe 4, a probe rod body consisting of a plurality of spiral electrode modules 5 and a probe rod tail end 6;
the conical tip probe 4 is made of stainless steel, is arranged at the head of the probe rod body and adopts a conical tip form so as to facilitate the probe rod to rotatably penetrate into the soil body;
the spiral electrode modules 5 are main components of the probe rod body, as shown in fig. 4 and 5, the spiral electrode modules 5 are axially arranged to form the probe rod body, each spiral electrode module 5 comprises a cylindrical module main body 12 and a movable spiral electrode 13 surrounding the cylindrical module main body, the module main body 12 is made of insulating nylon materials through pouring, an installation groove 23 and a connection hole 15 penetrating through the module main body 12 in the thickness direction are formed in the module main body 12, a lead connected with the spiral electrode 13 is placed in the installation groove 23, and a fixing rod is inserted into the connection hole 15 to fix each spiral electrode module 5 so as to form the probe rod body; the side wall of the module main body 12 is also provided with a sliding groove 14;
when the probe rod body is formed, the spiral electrode 13 surrounds the module main body 12, and the pitch of the spiral electrode is equal to the height of the spiral electrode module 5, that is, the spiral electrode 13 of each spiral electrode module 5 is a whole circle, the top end point of the spiral electrode 13 is rigidly connected to the module main body 12, in addition, an electrode transmission fixing member 16 is arranged at one-half pitch of the spiral electrode 13 and at the bottom end point of the spiral electrode 13, the electrode transmission fixing member 16 is located in the sliding groove 14, as shown in fig. 4 and 5, the electrode transmission fixing member 16 is made of an insulating material and is rigidly connected to the spiral electrode at the connection point, the electrode transmission fixing member 16 is connected to a transmission cable 17, and under the control of the transmission cable 17, the electrode transmission fixing member 16 slides up and down along the sliding groove 14 (it can be seen that, in this embodiment, the motor transmission fixing member only plays a role of fixing to the spiral electrode, in this embodiment, a buckle structure is adopted, certainly, other structures can be adopted), the transmission cables 17 on the upper and lower adjacent spiral electrode modules 5 are sequentially connected, the spiral electrode 13 is controlled to deform by the sliding of the two electrode transmission fixing pieces 16 at the middle part and the bottom part of the spiral electrode to form a closed annular electrode 18 (shown in fig. 4(b), when the electrode is in a spiral state, the probe enters a penetration mode, and when the electrode is adjusted to be a closed annular shape, the probe enters a measurement mode.
The tail end 6 of the probe rod comprises a hexagonal base 19 and a watertight plug 20, as shown in fig. 6, the hexagonal structure of the hexagonal base 19 is matched with a socket wrench during installation so as to be convenient for clamping, the watertight plug 20 is arranged on the side surface of the base so as to be connected with a spiral electrode through a lead, and the watertight plug has good sealing performance and ensures stability after being connected with a data line.
In addition, the electrode restoring device 2 is used for restoring the spiral electrode to a closed state after the probe rod is penetrated into the soil, as shown in fig. 7, the electrode restoring device 2 is arranged on the tail end 6 of the probe rod, the electrode restoring device 2 comprises a fixed chassis 7, a pulley block 8 and a driving runner 9, three mounting plates are arranged on the fixed chassis 7 for mounting the fixed pulley block 8 and the driving runner 9, the pulley block 8 comprises a first pulley block 81 and a second pulley block 82, the driving runner 9 comprises a first driving runner 91 and a second driving runner 92, the diameter of the first driving runner 91 is equal to the height of the spiral electrode module, the radius of the second driving runner 92 is half of that of the first driving runner 91, two connecting holes 21 are arranged on the fixed chassis 7, the connecting holes 21 correspond to the sliding grooves 14, two transmission cables 17 connecting the bottom end point of the spiral electrode and the half pitch respectively and correspondingly penetrate through the two connecting holes 21, the transmission cable 17 connected with the electrode transmission fixing piece 16 at the bottom end point of the spiral electrode is connected with the first driving rotating wheel 91 through the first pulley block 81, and the transmission cable 17 connected with the electrode transmission fixing piece 16 at the half pitch of the spiral electrode is connected with the second driving rotating wheel 92 through the second pulley block 82.
In this embodiment, the transmission cable 17 is connected to the driving pulley 9 through the pulley 8, the pulley block 8 is used for changing the direction of the transmission cable, the driving pulley 9 is divided into two parts, two fixing members (a fixing member at a half pitch and a fixing member at the bottom end of the electrode) are respectively controlled, the large driving pulley is connected to the fixing member at the bottom of the module, and the small driving pulley is connected to the fixing member at the half pitch, so that the reset of the spiral electrode 13 is skillfully controlled.
In addition, a first handle 23 is arranged on the first driving rotating wheel 91, a second handle 22 is arranged on the second driving rotating wheel 92, the two driving rotating wheels rotate for the same number of turns in a hand-cranking or motor-driven mode, the rotating electrode is converted into a complete annular electrode perpendicular to the axial direction of the probe rod, and in order to achieve synchronous control, the first handle 23 and the second handle 22 can be fixedly connected through a connecting rod.
The penetration device 3 comprises a sleeve 10 and a crowbar 11, as shown in fig. 2, the sleeve 10 is matched with a hexagonal base 19 at the tail end of the probe, and the spiral probe 1 is penetrated into the soil by rotating the sleeve through the crowbar 11.
In the embodiment, a brand new measuring probe rod structure is designed, and the probe rod can be switched from a penetration mode to a measuring mode through the design of a pulley transmission device and a transmission fixing piece; the characteristics of electrode expansion and closing are skillfully applied, the penetration is facilitated by the appearance of the electrode, and the measurement precision is not influenced after mode conversion; in addition, a field installation mode which can be completed only by manual operation is designed, and the difficulty of installing field in-situ monitoring equipment is greatly reduced.
1. the method comprises the following steps that (1) before the probe rod is installed, a certain number of spiral electrode modules are assembled according to the required depth to be measured to form a spiral probe rod;
2. adopting a soil sampler to take a shallow hole with a diameter slightly larger than that of the probe rod on the ground, installing a sleeve at the tail end of the probe rod and placing the head of the probe rod in the shallow hole;
3. inserting a crowbar 11 into a socket wrench to rotate, enabling a spiral probe rod to penetrate into the soil body along with rotation until the tail end of the probe rod approaches the surface of the soil, and taking down the crowbar and the socket;
4. the electrode resetting device 2 is installed and fixed at the tail end of the probe rod, and a steel cable on the pulley is connected with a transmission cable of the probe rod electrode;
5. according to the length of the probe rod, the two driving rotating wheels rotate for a circle manually or by adopting a motor (two handles are connected together and can rotate synchronously); the driving cable controls the spiral electrodes of all the electrode modules to be converted to the annular electrodes. Finally forming annular electrodes which are arranged at equal intervals and are vertical to the axial direction of the probe rod;
6. after the conversion of the electrode form is completed, the transmission cable is cut off, and the electrode recovery device is taken down.
7. And connecting a data line through the watertight plug, and starting in-situ monitoring by debugging equipment.
When the transmission device controls the spiral electrode to change into the annular electrode, the probe rod enters a measurement mode from a penetration mode, a thread line of the spiral electrode close to one side of the module is unfolded to form a straight line along the cylindrical surface of the module, and the straight line, the circumferential length Pi D of the module and the height h of the module form a right-angle triangle.
It should be noted that: if the module diameter D is 50mm and the height h is 10mm, the perimeter π D is about 157.08mm, L is about 157.40 mm:
the difference value of the electrode type detection electrode is 4 orders of magnitude different from the length of the electrode type detection electrode, in the design of the electrode module, the module circumference pi D is far larger than h, and therefore in the process of switching from the penetration mode to the measurement mode, the redundant length after the electrode form is changed can be ignored. Therefore, the copper electrodes on the measuring probe rod are arranged at equal intervals along the axial direction of the probe rod, so that the radial plane of the annular electrode is considered to be perpendicular to the axial direction of the probe rod during calculation and coaxial with the probe rod.
When the probe rod works, each annular electrode can be used as a power supply electrode and a measuring electrode in turn. As shown in fig. 8, the probe part M1，M2The two electrodes are now the supply electrodes, while the two electrodes N1, N2 measure the potential difference as the measuring electrodes. The spacing between each electrode is x, so N is the same1The potential at (a) is:
V(N1)＝VM1(x)-VM2(2x)
at the same time, N2The potential at (a) is:
V(N2)＝VM1(2x)-VM2(x)
and setting the linear distance from one point on the annular electrode to any point in space as R, the conductivity of the medium as rho, and the current density J at one point P in space as follows according to ohm's law:
in N1Electrode position to M1,M2Are equal to x,2x, respectively, according to the geometrical relationship, there are
In a global homogeneous medium, apparent resistivity ρ is:
comparing the above two equations, the value of the geometric factor G in the measurement probe mode is:
during measurement, the current or the voltage is controlled to be kept at a constant value, the change of the other value is calculated to obtain the change of the external soil resistance value of the probe rod, the apparent resistivity change process of the soil is obtained according to a formula or a calibration empirical formula, and long-term in-situ monitoring on the change of the resistivity of the positioning soil is completed.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (10)
1. The spiral electrode resistivity probe rod is characterized by comprising a spiral probe rod (1) and an auxiliary device thereof, wherein the auxiliary device comprises an electrode restoring device (2) and a penetration device (3), and the penetration device (3) is used for assisting the spiral probe rod (1) to rotate and penetrate into soil;
the spiral probe rod (1) comprises a conical tip probe (4), a probe rod body and a probe rod tail end (6), wherein the conical tip probe (4), the probe rod body and the probe rod tail end are sequentially connected from bottom to top; the spiral electrode module (5) comprises a module main body (12) and spiral electrodes (13) arranged around the module main body, the thread pitches of the spiral electrodes (13) are as high as those of the spiral electrode module (5), the top end points of the spiral electrodes (13) are rigidly connected with the module main body (12), and electrode transmission fixing pieces (16) are arranged at the half thread pitches of the spiral electrodes (13) and the bottom end points of the spiral electrodes (13); a sliding groove (14) is formed in the side wall of the module main body (12), the electrode transmission fixing pieces (16) are located in the sliding groove (14), and the upper and lower adjacent transmission fixing pieces (16) are connected through a transmission cable (17);
the electrode resetting device (2) is arranged on the tail end (6) of the probe rod and used for resetting the spiral electrode (13) into a closed annular electrode (18) in a measuring state, and the electrode resetting device (2) is connected with the transmission cable (17).
2. The helical electrode resistivity probe of claim 1, wherein: the electrode restoration device (2) comprises a fixed chassis (7), and a pulley block (8) and a driving rotating wheel (9) which are arranged on the fixed chassis (7), wherein the pulley block (8) comprises a first pulley block (81) and a second pulley block (82), and the driving rotating wheel (9) comprises a first driving rotating wheel (91) and a second driving rotating wheel (92);
the diameter of first drive runner (91) equals with the height of spiral electrode module (5), and the radius of second drive runner (92) is one-half of first drive runner (91), there are two connecting holes (21) on fixed chassis (7), connecting hole (21) are corresponding with sliding tray (14), and two transmission cables (17) that connect spiral electrode (13) bottom extreme point and half pitch department pass two connecting holes (21) that correspond respectively, and transmission cable (17) of connecting spiral electrode bottom extreme point department electrode transmission mounting (16) link to each other with first drive runner (91) through first assembly pulley (81), and transmission cable (17) of connecting spiral electrode half pitch department electrode transmission mounting (16) link to each other through second drive runner (92) that second assembly pulley (82) and.
3. The helical electrode resistivity probe of claim 1, wherein: the module body (12) is provided with a mounting groove (23) and a connecting hole (15) which penetrate through the thickness direction of the module body, a lead for connecting the spiral electrodes (13) is placed in the mounting groove (23), and a fixing rod is inserted into the connecting hole (15) to fix each spiral electrode module (5).
4. The helical electrode resistivity probe of claim 2 wherein: the first driving rotating wheel (91) is provided with a first handle (23), the second driving rotating wheel (92) is provided with a second handle (22), and the first handle (23) and the second handle (22) are fixedly connected through a connecting rod.
5. The helical electrode resistivity probe of claim 1, wherein: the tail end (6) of the probe rod comprises a base (19) and a watertight plug (20) arranged on the side surface of the base (19), and the watertight plug (20) is connected with the spiral electrode (13) through a lead.
6. The helical electrode resistivity probe of claim 5 wherein: the penetration device (3) comprises a sleeve (10) and a crowbar (11), wherein a through hole allowing the crowbar (11) to pass through is formed in the sleeve (10), and the inner diameter of the sleeve (10) is matched with the outer diameter of a base (19) at the tail end of the probe rod.
7. The helical electrode resistivity probe of claim 1, wherein: the cone-tip probe (4) is made of stainless steel and is arranged at the head of the probe rod body.
8. The helical electrode resistivity probe of claim 1, wherein: the electrode transmission fixing piece (16) is made of insulating materials and is rigidly connected with the spiral electrode (13) at a connecting point.
9. The helical electrode resistivity probe of claim 1, wherein: the module main body (12) is made of insulating nylon materials in a pouring mode.
10. The method for monitoring the resistivity probe of the spiral electrode according to any one of claims 1 to 9, comprising the steps of:
(1) assembling the spiral probe rod according to the monitoring depth, and forming the spiral probe rod by connecting a plurality of spiral electrode modules;
(2) taking a shallow hole with the diameter larger than that of the spiral probe rod at a monitoring point, installing a sleeve at the tail end of the spiral probe rod and placing the head of the probe rod in the shallow hole;
(3) inserting a crowbar into a socket spanner to rotate, enabling a spiral probe rod to penetrate into the soil body along with rotation until the tail end of the probe rod is close to the surface of the soil, and taking down the crowbar and the socket;
(4) the electrode resetting device is fixedly arranged at the tail end of the probe rod and is connected with a transmission cable of the probe rod electrode;
(5) rotating the first driving rotating wheel and the second driving rotating wheel for a circle according to the length of the spiral probe rod; the transmission cable controls the spiral electrodes of all the electrode modules to be converted into annular electrodes, and finally the annular electrodes which are perpendicular to the axial direction of the probe rod and are arranged at equal intervals are formed;
(6) after the conversion of the electrode form is completed, cutting off the transmission cable, and taking down the electrode recovery device;
(7) and connecting a data line through the watertight plug, and starting in-situ monitoring by debugging equipment.
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| CN113655292B (en) * | 2021-04-12 | 2023-09-15 | 重庆大学 | Self-energy-taking electric field measurement sensor based on multilayer spiral electrode induction structure |
| CN113155201B (en) * | 2021-05-22 | 2022-03-11 | 五度智能科技(徐州)有限公司 | Self-adaptive monitoring device for water pollutants in urban water network |
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