Reference electrode

Abstract

The present invention relates to the field of electrochemical measurement technologies, and particularly to a reference electrode. The reference electrode provided by an embodiment of the present invention includes a bamboo tube and an electrode rod. A cavity is formed inside the bamboo tube. One end of the bamboo tube is provided with a liquid injection hole, and the other end is provided with a biodegradable permeable component. The liquid injection hole is used to inject an electrolyte solution into the cavity; the electrode rod extends into the cavity from the end with the liquid injection hole of the bamboo tube and is electrically connected to the electrolyte solution; wherein, the electrolyte solution in the cavity exchanges ions with the soil through the biodegradable permeable component. The reference electrode provided by the embodiment of the present invention can effectively avoid environmental pollution and is more energy-saving and environmentally friendly.

Description

Technical Field

[0001] The present invention relates to the technical field of electrochemical measurement, and particularly relates to a reference electrode. Background Art

[0002] Copper sulfate reference electrodes are mostly used for measuring the potential of underground metal structures. The positive pole of a voltmeter is connected to the metal structure, and the negative pole is connected to the copper sulfate reference electrode. At this time, the voltage measured by the multimeter is the potential of the metal structure. Traditional copper sulfate reference electrodes mainly consist of three parts: a copper rod, a plastic housing, and a ceramic plug. The ceramic plug plays a role in the ion exchange between the copper sulfate solution and soil ions. Before use, saturated copper sulfate solution is injected into the plastic housing, and after standing for a period of time, it can be used.

[0003] It has been found in the use of current copper sulfate reference electrodes that: the plastic housing needs to be injection-molded from plastic and the material is non-degradable, and the service life of the reference electrode is generally short. A large number of discarded plastic housings cannot be effectively degraded, resulting in environmental pollution; the ceramic plug is made of ceramic powder through high-temperature sintering and belongs to inorganic non-metallic materials, which is energy-consuming in the production and manufacturing process and is not conducive to energy conservation and environmental protection. Summary of the Invention

[0004] The present invention provides a reference electrode, which can effectively avoid environmental pollution and is more energy-saving and environmentally friendly.

[0005] An embodiment of the present invention provides a reference electrode, including: a bamboo tube, a cavity is formed inside the bamboo tube, a liquid injection hole is provided at one end of the bamboo tube, and a degradable permeation component is provided at the other end. The liquid injection hole is used to inject electrolyte solution into the cavity; an electrode rod extends into the cavity from the end of the bamboo tube with the liquid injection hole and is electrically connected to the electrolyte solution; wherein, the electrolyte solution in the cavity exchanges ions with the soil through the degradable permeation component.

[0006] In a possible implementation manner, the degradable permeation component has a curved surface structure for contacting the soil.

[0007] In a possible implementation manner, one end of the bamboo tube is provided with a first bamboo joint, the liquid injection hole is provided on the first bamboo joint, a through hole for the electrode rod to extend into the cavity is provided on the first bamboo joint, and the electrode rod is hermetically fixed to the through hole.

[0008] In a possible implementation manner, the end of the bamboo tube away from the first bamboo joint is provided with a second bamboo joint, and the second bamboo joint forms the degradable permeation component.

[0009] In a possible implementation manner, the end of the bamboo tube away from the first bamboo joint is provided with an installation opening for installing the degradable permeation component.

[0010] In a possible implementation, the degradable permeation component includes multiple bamboo filaments arranged densely, and the multiple bamboo filaments are arranged along the extending direction of the bamboo tube.

[0011] In a possible implementation, the diameter of the bamboo filaments is less than 1 mm, and the gap between the bamboo filaments is less than 0.5 mm.

[0012] In a possible implementation, the degradable permeation component further includes a fastener, the fastener is sleeved on the outer periphery of the multiple bamboo filaments, and the outer periphery of the fastener abuts against the mounting opening.

[0013] In a possible implementation, the degradable permeation component further includes an adhesive filled in the gaps between the multiple bamboo filaments, and the multiple bamboo filaments are fixed and formed through the adhesive.

[0014] In a possible implementation, the adhesive also surrounds and is arranged on the outer peripheral side of the multiple bamboo filaments.

[0015] For the reference electrode provided by the present invention, the reference electrode uses a bamboo tube to hold the electrolytic solution. Compared with the existing plastic housing, it can avoid environmental pollution caused by the inability of the plastic housing to be effectively reduced. Using a degradable permeation component to replace the existing ceramic plug can not only reduce environmental pollution through degradation, but also reduce the use of inorganic non-metallic materials, which is more energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic structural diagram of a reference electrode provided by the present invention.

[0018] Figure 2 It is a schematic structural diagram of another reference electrode provided by the present invention.

[0019] Figure 3 It is a schematic structural diagram of yet another reference electrode provided by the present invention.

[0020] Figure 4 It is Figure 2 a schematic plan view of the degradable permeation component in the reference electrode shown.

[0021] Figure 5 It is Figure 3 a schematic plan view of the degradable permeation component in the reference electrode shown.

[0022] Reference numerals:

[0023] 1, bamboo tube; 11, cavity; 12, liquid injection hole; 13, first bamboo joint; 14, mounting port;

[0024] 2, biodegradable permeation component; 21, arc surface structure; 22, bamboo filaments; 23, fastener; 24, adhesive;

[0025] 3, electrode rod. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0027] The following will be described in conjunction with Figures 1-5 A reference electrode provided by an embodiment of the present invention is described, including: a bamboo tube 1, a cavity 11 is formed inside the bamboo tube 1, a liquid injection hole 12 is provided at one end of the bamboo tube 1, and a biodegradable permeation component 2 is provided at the other end. The liquid injection hole 12 is used to inject an electrolyte solution into the cavity 11; an electrode rod 3 extends into the cavity 11 from the end of the bamboo tube 1 with the liquid injection hole 12 and is electrically connected to the electrolyte solution; wherein, the electrolyte solution in the cavity 11 exchanges ions with the soil through the biodegradable permeation component 2.

[0028] In the present invention, by using the bamboo tube 1 to hold the electrolytic solution, compared with the existing plastic shell, environmental pollution caused by the inability to effectively reduce the plastic shell can be avoided. Using a biodegradable permeation component to replace the existing ceramic plug can not only reduce environmental pollution through degradation, but also reduce the use of inorganic non-metallic materials, which is more energy-saving and environmentally friendly.

[0029] Specifically, the reference electrode in the embodiment of the present invention is a copper sulfate reference electrode, the electrolyte solution held in the cavity 11 of the bamboo tube 1 is a saturated copper sulfate solution; the electrode rod 3 is made of a copper rod. When in use, the positive pole of the voltmeter is connected to the metal structure, and the negative pole is connected to the copper sulfate reference electrode. At this time, the voltage measured by the multimeter is the potential of the metal structure.

[0030] After adding copper sulfate solution through the liquid injection hole 12, in order to seal the copper sulfate solution, a lid is installed at the liquid injection hole 12 to seal the liquid injection hole 12, which can prevent the copper sulfate solution from volatilizing and can also prevent the copper sulfate solution from spilling after the motor is toppled.

[0031] In the related art, the current copper sulfate reference electrode mainly consists of three parts: a copper rod, a plastic housing, and a ceramic plug. The ceramic plug plays a role in the ion exchange between the copper sulfate solution and the soil ions. In terms of the structural composition, the plastic housing needs to be injection-molded from plastic and the material is non-degradable. The service life of the reference electrode is generally short. A large number of discarded plastic housings cannot be effectively degraded, resulting in environmental pollution. The ceramic plug is made of ceramic powder through high-temperature sintering and belongs to inorganic non-metallic materials, which is energy-consuming in the production and manufacturing process and is not conducive to energy conservation and environmental protection.

[0032] The reference electrode provided in the embodiment of the present invention has the following effects compared with the current reference electrode:

[0033] First, the bamboo tube 1 is used as the electrode housing to replace the traditional plastic housing. As a natural biological material, bamboo has the characteristics of being renewable and degradable. In practical applications, when the service life of the reference electrode ends, the bamboo tube 1 can be naturally degraded in the soil without causing environmental pollution. This solves the environmental problem caused by the non-degradable traditional plastic housing reference electrode. No harmful substances are generated during the degradation process of the bamboo tube 1, which fully meets the environmental protection requirements.

[0034] Second, the bamboo tube 1 has a unique vascular bundle structure, and its fiber tissue forms a natural semi-permeable property. This structure enables the bamboo tube 1 to not only maintain a certain mechanical strength to meet the use requirements of the reference electrode but also achieve slow ion exchange. During the actual measurement process, this semi-permeable property helps to maintain the relative stability of the electrolyte solution concentration and improve the measurement accuracy.

[0035] Third, the cavity 11 structure of the bamboo tube 1 is convenient for injecting and storing the electrolyte solution. During use, the electrolyte solution can be conveniently added or replaced through the liquid injection hole 12, and the operation is simple and convenient. The sealing performance of the cavity 11 is good, and the solution can be kept from leaking for a long time.

[0036] Fourth, the degradable permeable component 2 replaces the traditional ceramic plug, avoiding the high-temperature sintering process in the manufacture of the ceramic plug. This not only saves energy consumption but also simplifies the production process. In practical applications, the degradable permeable component 2 can maintain an appropriate permeation rate to ensure the normal operation of the electrode.

[0037] As Figure 1 shown, in some embodiments, the degradable permeable component 2 has an arc surface structure 21 for contacting the soil.

[0038] In the embodiments of the present invention, first, the arc surface structure 21 significantly increases the contact area between the permeation component and the soil. In practical applications, a larger contact area means more ion exchange channels, improving the response speed and measurement sensitivity of the electrode. Especially when the soil conductivity is poor, increasing the contact area can effectively reduce the grounding resistance. Second, the arc surface structure 21 can reduce the pressure of the soil on the permeation component. When the reference electrode is buried underground, the soil will exert a squeezing pressure on the electrode. The arc surface structure 21 can make this pressure evenly distributed, avoiding local stress concentration and extending the service life of the electrode. Whether the arc surface structure 21 is convex or concave, this effect can be achieved. Third, the arc surface structure 21 is beneficial to removing the air bubbles between the soil and the contact surface of the permeation component. In actual measurement, the presence of air bubbles will affect the measurement accuracy. The arc surface structure 21 can promote the natural flow and elimination of air bubbles, ensuring a good electrical contact effect.

[0039] Specifically, the arc surface structure 21 can be in a convex form or a concave form, and can be processed into the arc surface structure 21 by means of grinding.

[0040] During specific use, the bottom of the bamboo tube 1 can be buried in the soil, so that the degradable permeation component 2 at the bottom of the bamboo tube 1 is in full contact with the soil and conducts ion exchange operations with the soil. The semi-permeable structure can also be formed by utilizing the characteristics of the whole body fiber of the bamboo tube 1. Partially or entirely burying the bamboo tube 1 in the soil can further increase the contact area, effectively reduce the contact resistance with the soil, improve the measurement accuracy, and solve the problems of small contact area and large grounding resistance of traditional ceramic plugs or corks.

[0041] In some embodiments, a first bamboo joint 13 is provided at one end of the bamboo tube 1, the liquid injection hole 12 is arranged on the first bamboo joint 13, and a through hole for the electrode rod 3 to extend into the cavity 11 is provided on the first bamboo joint 13. The electrode rod 3 is fixedly sealed with the through hole.

[0042] In the embodiments of the present invention, the part between two bamboo joints is selected for the bamboo tube 1, and the first bamboo joint 13 at the top of the bamboo tube 1 is used to form the upper cover of the bamboo tube 1. Through holes and liquid injection holes 12 are formed by drilling holes in the upper cover. The through holes are used to install the electrode rods 3, and environmental protection glue is used for bonding and sealing the gap between the electrode rods 3 and the through holes of the first bamboo joint 13.

[0043] Specifically, the natural partition structure of the bamboo joint is utilized as the sealed end of the electrode, avoiding additional sealing components and simplifying the structural design. The bamboo joint itself has good strength and sealing performance, with high reliability. Drilling a liquid injection hole 12 and a through hole for the electrode rod 3 on the bamboo joint is convenient for processing and has low cost. Due to the dense fiber structure of the bamboo joint, it is not easy to crack after opening the hole, ensuring a good sealing effect. The electrode rod 3 is hermetically fixed to the through hole using an environmentally friendly glue, which not only ensures the sealing performance but also does not affect the overall degradable characteristics. In actual use, this sealing method can effectively prevent the leakage of the electrolyte solution.

[0044] The functional design of the first bamboo joint 13 reflects multiple engineering considerations. The bamboo joint is a natural strengthening structure of bamboo, and its transverse fiber density is about 30% higher than that of the bamboo wall. This structural feature makes it particularly suitable as an end sealing component. In actual processing, the positions of the liquid injection hole 12 and the through hole for the electrode rod 3 need to be precisely designed. Usually, the liquid injection hole 12 is set at a position near the edge of the first bamboo joint 13, with a diameter controlled within 3 - 4 mm. This size is convenient for liquid injection and does not affect the structural strength. The through hole for the electrode rod 3 is set near the center, with a diameter generally of 2 - 3 mm, slightly smaller than the diameter of the electrode rod 3 to achieve an interference fit.

[0045] In the sealing and fixing solution, an environmentally friendly epoxy resin is used as the sealant. This material has good adhesive strength and water resistance, and at the same time its degradation period is similar to that of bamboo. The usage amount of the sealant needs to be strictly controlled, usually within the range of 0.2 - 0.3 g. Excessive use will affect the overall degradation characteristics, while too little may result in insufficient sealing. When applying the sealant, an injection - type dispensing method is used to ensure that the sealant is evenly distributed around the electrode rod 3. After 24 - hour natural curing, the joint can withstand a water pressure of 0.2 MPa without leakage.

[0046] As Figure 1 shown, in some embodiments, a second bamboo joint is provided at one end of the bamboo tube 1 away from the first bamboo joint 13, and the second bamboo joint forms a degradable permeation component 2.

[0047] In the embodiments of the present invention, the second bamboo joint is directly used as the permeation component, making full use of the natural structural characteristics of bamboo. The vascular bundle tissue of the bamboo joint forms an ideal semi - permeable structure, and the ion - exchange function can be achieved without additional processing. This design greatly simplifies the manufacturing process and reduces the production cost. The entire reference electrode only needs simple processing at both ends of the bamboo tube 1 to be completed, improving the production efficiency. The integrated structural design improves the reliability of the product and avoids the possible leakage problem at the connection between the ceramic plug and the housing in traditional reference electrodes.

[0048] As Figures 2-3 shown, in some embodiments, an installation opening 14 for installing the degradable permeation component 2 is provided at one end of the bamboo tube 1 away from the first bamboo joint 13.

[0049] In the embodiments of the present invention, the provision of the installation opening 14 enables the replaceability of the degradable permeation component 2, extending the service life of the reference electrode. When the performance of the permeation component deteriorates, a new component can be conveniently replaced without replacing the entire electrode. Secondly, this design increases the versatility of the product. Different types of permeation components can be selected according to different usage environments, improving the adaptability of the product. The design of the installation opening 14 facilitates the installation and fixation of the permeation component, improving the assembly efficiency and reliability of the product.

[0050] In another embodiment, the degradable permeation component 2 includes a plurality of bamboo filaments 22 arranged densely, and the plurality of bamboo filaments 22 are arranged along the extending direction of the bamboo tube 1.

[0051] In the embodiments of the present invention, the densely arranged bamboo filaments 22 form a uniform microporous structure, providing an ideal ion exchange channel. This structure can not only ensure sufficient permeability but also prevent the rapid loss of the electrolyte solution. The bamboo filaments 22 are arranged along the extending direction of the bamboo tube 1, which is consistent with the solution flow direction, facilitating the maintenance of a stable ion exchange rate. This arrangement also enhances the overall strength of the structure. The structure of the bamboo filaments 22 significantly increases the contact area with the soil, improving the response characteristics of the electrode. In practical applications, more stable measurement results can be obtained with this structure.

[0052] In this embodiment, the bamboo tube 1 is provided with a first bamboo joint 13 only at the top, and no second bamboo joint is provided at the bottom. The bottom of the bamboo tube 1 is in an open form and forms an installation opening 14, through which the degradable permeation component 2 is installed.

[0053] In some embodiments, the diameter of the bamboo filaments 22 is less than 1 mm, and the gap between the bamboo filaments 22 is less than 0.5 mm.

[0054] In the present invention, by defining the dimensions of the bamboo filaments 22 and the gap between the bamboo filaments 22, the contact area between the bamboo filaments 22 is ensured, preventing large-area seepage of the solution and at the same time increasing the contact area with the soil.

[0055] Specifically, the design of the bamboo filaments 22 with a diameter less than 1 mm ensures a sufficiently fine permeation structure. The bamboo filaments 22 of this size have appropriate mechanical strength while ensuring good permeation effects. The requirement that the gap is less than 0.5 mm ensures the controllability of the permeation rate. An overly large gap will cause the rapid loss of the electrolyte solution, while an overly small gap will affect the ion exchange efficiency. This numerical range has been verified through practice and can achieve the best working effects. This precise size control contributes to the standardization of product performance, improving the consistency and reliability of the product.

[0056] Such as Figure 2 、 4As shown, in some embodiments, the degradable permeation component 2 further includes a fastener 23. The fastener 23 is sleeved on the outer periphery of a plurality of bamboo filaments 22, and the outer periphery of the fastener 23 abuts against the mounting opening 14.

[0057] In the present invention, the provision of the fastener 23 ensures the structural stability of the bundle of bamboo filaments 22. Through peripheral compression, the bamboo filaments 22 are prevented from loosening, maintaining stable permeation performance. The abutting design of the fastener 23 against the mounting opening 14 provides a reliable sealing effect. This structure not only ensures the firmness of installation but also prevents the leakage of the electrolyte solution. The fastener 23 made of a degradable material, such as a silicone rubber ring, maintains the overall environmental protection characteristics.

[0058] Specifically, in this embodiment, the fastener 23 is a rubber ring. The bamboo filaments 22 are bundled by the rubber ring, and the elastic force of the rubber ring ensures that the gaps between the bamboo filaments 22 meet the requirements. Moreover, the rubber ring can also fully fit with the inner surface of the mounting opening 14 through its own elasticity, improving the fixing effect on the bamboo filaments 22 and ensuring the sealing effect between the degradable permeation component 2 and the mounting opening 14.

[0059] As Figure 3 、 5 As shown, in some embodiments, the degradable permeation component 2 further includes an adhesive 24 filled in the gaps between a plurality of bamboo filaments 22, and the plurality of bamboo filaments 22 are fixed and formed through the adhesive 24.

[0060] In the present invention, the adhesive 24 fills the gaps between the bamboo filaments 22, forming a stable overall structure. This method is more reliable than simple mechanical compression and can maintain the structural stability for a long time. An environmentally friendly adhesive 24 is selected to ensure the overall degradability. The use of the adhesive 24 does not affect the environmental protection characteristics of the product. This structural design facilitates batch production and improves production efficiency.

[0061] Specifically, when producing the degradable permeation component 2 in this embodiment, the densely arranged bamboo filaments 22 can be immersed in a mold filled with the adhesive 24. After firm adhesion, the adhesive 24 at both ends is removed by grinding. The adhesive 24 can fill the gaps between the bamboo filaments 22, enabling the solution to only permeate through the bamboo filaments 22, and fundamentally solving the problem of large-area permeation of the solution.

[0062] Optionally, the adhesive 24 at both ends of the bamboo filaments 22 can also be cut off by physical cutting to expose the bamboo filaments 22.

[0063] In some embodiments, the adhesive 24 also surrounds and is disposed on the outer peripheral side of a plurality of bamboo filaments 22.

[0064] In the embodiment of the present invention, the design of the adhesive 24 surrounding the outer periphery of the bamboo filaments 22 enhances the overall sealing performance. This structure can effectively prevent the electrolyte solution from leaking from the side of the bamboo filaments 22 bundle. The peripheral surrounding design provides additional mechanical protection and enhances the durability of the structure. In actual use, this structure can better withstand external pressure. This design is easy to process and manufacture, and only needs to apply the adhesive 24 on the outside of the bamboo filaments 22 bundle, which is simple and convenient to operate.

[0065] Specifically, the adhesive 24 surrounds the outer circumference of the bamboo filaments 22 to ensure the structural stability of the bamboo filaments 22 . After the bamboo filaments 22 are fixed and formed, the adhesive 24 can be used to seal and fix the formed bamboo filaments 22 to the installation opening 14 .

[0066] The reference electrode uses a bamboo tube 1 to contain the electrolytic solution. Compared with the existing plastic shell, it can avoid the environmental pollution caused by the inability of the plastic shell to effectively reduce the solution. The degradable permeation component is used to replace the existing ceramic plug, which can not only reduce the pollution to the environment through degradation, but also reduce the use of inorganic non-metallic materials, which is more energy-saving and environmentally friendly.

[0067] First, from the perspective of material selection, the bamboo tube 1 has unique advantages as a reference electrode shell. Bamboo has a short growth cycle and can generally be mature in 3-5 years. It is a renewable green resource. Bamboo contains about 60-70% cellulose, 20-30% hemicellulose and 10-20% lignin, all of which can be degraded by microorganisms in the soil. In actual use, when the reference electrode is scrapped, the bamboo tube 1 can be completely degraded in the soil environment within 1-2 years, and finally converted into carbon dioxide and water without producing any harmful substances. In contrast, traditional plastic shells are made of materials such as polyvinyl chloride (PVC) or polypropylene (PP), and the degradation cycle in the natural environment is as long as hundreds of years, and may release microplastic pollutants.

[0068] From the perspective of structural design, the natural hollow structure of the bamboo tube 1 perfectly meets the functional requirements of the reference electrode. The wall of the bamboo tube 1 is composed of multiple layers of cell tissue, including the epidermis, the basic tissue layer and the vascular layer. This multi-layer structure forms an ideal balance between mechanical strength and permeability. The epidermis contains a large amount of silica, which provides good wear resistance and water resistance; the basic tissue layer is rich in fibers, ensuring sufficient mechanical strength; the vascular layer forms a micron-scale duct network, which is interconnected in the radial and axial directions, forming an ideal semi-permeable structure. In actual work, when the electrolyte solution is injected into the cavity 11 of the bamboo tube 1, the solution will slowly penetrate into the microporous structure of the wall of the bamboo tube 1 under capillary action, but will not be lost quickly, thereby maintaining a stable ion exchange environment.

[0069] From the perspective of manufacturing process, the processing of the bamboo tube 1 reference electrode is simple and environmentally friendly. First, the bamboo material is selected. Usually, 3-5-year-old Phyllostachys pubescens is chosen. Bamboo at this age has a moderate wall thickness and strength. The preparation of the bamboo tube 1 only requires simple machining such as cutting and drilling, without the use of energy-consuming processes such as high temperature and high pressure. In contrast, the manufacturing of traditional ceramic plugs requires sintering at a high temperature of 1200-1400 °C, which not only has high energy consumption but also generates a large amount of greenhouse gas emissions.

[0070] From the perspective of service performance, the bamboo tube 1 reference electrode exhibits excellent comprehensive characteristics. The cavity 11 can accommodate a sufficient volume of electrolyte solution. Generally, 20-30 ml of saturated copper sulfate solution can be filled, and this capacity can support long-term stable operation. The mechanical strength of the bamboo tube 1 is sufficient to withstand the external forces during normal use. The compressive strength can reach 40-50 MPa, and the flexural strength is in the range of 100-120 MPa. In on-site measurements, the natural fiber structure of the bamboo tube 1 also has a certain buffering effect and can adapt to the temperature and humidity changes in the soil environment.

[0071] The design of the arc surface structure 21 not only increases the contact area but, more importantly, optimizes the electric field distribution. In practical applications, the arc surface can be designed as a spherical crown shape, and the radius is generally controlled within the range of 15-20 mm. This curvature design enables the electric field lines to be evenly distributed, avoiding measurement errors that may be caused by the sharp corner effect. When the reference electrode is buried in the soil, the arc surface structure 21 can also naturally form a stable soil contact layer. Over time, soil particles will gradually fill the micro-concavities and convexities of the arc surface, forming a closer contact. This progressive contact improvement process helps to obtain more stable measurement results.

[0072] In addition, the arc surface structure 21 also has a self-cleaning effect. During the infiltration of rainwater or groundwater, the arc surface can promote the natural flow of water, carry away the accumulated dirt, and maintain the cleanliness of the contact surface. This characteristic is particularly important during long-term use and can extend the effective service life of the electrode. Experiments have shown that for the reference electrode with the arc surface structure 21, after continuous use for 3 months, the measurement error increases by no more than 2%, while the error increase of the traditional planar structure can reach 5-8%.

[0073] The embodiment of the present invention provides a method for manufacturing the above-mentioned reference electrode, including the following steps:

[0074] S1. Bamboo tube processing: Cut off the bamboo tube and retain the bamboo joints at both ends. Drill a liquid injection hole and a through hole at the position of one bamboo joint, and polish the other bamboo joint into an arc surface structure;

[0075] S2. Electrode rod installation: Insert the electrode rod into the through hole to a certain depth, and use environmentally friendly glue for bonding and sealing the gap between the electrode rod and the opening of the bamboo joint;

[0076] S3. Add electrolyte solution into the bamboo tube through the liquid injection hole and seal the liquid injection hole.

[0077] The embodiment of the present invention also provides another method for manufacturing a reference electrode, including the following steps:

[0078] S4. Bamboo tube processing: Cut off the bamboo tube and retain one end of the bamboo joint, drill a liquid injection hole and a through hole at the position of the bamboo joint;

[0079] S5. Electrode rod installation: Insert the electrode rod into the through hole to a certain depth, and use environmentally friendly glue to bond and seal the gap between the electrode rod and the opening of the bamboo joint;

[0080] S6. Manufacture a biodegradable permeable component: Process the bamboo into thin bamboo filaments, use the thin bamboo filaments to arrange and combine to form a permeable structure, and fix it inside one end of the bamboo tube away from the bamboo joint;

[0081] S7. Add electrolyte solution into the bamboo tube through the liquid injection hole and seal the liquid injection hole.

[0082] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative labor.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reference electrode, characterized in that include: A bamboo tube (1), wherein a cavity (11) is formed inside the bamboo tube (1), a liquid injection hole (12) is provided at one end of the bamboo tube (1), and a degradable permeable component (2) is provided at the other end, wherein the liquid injection hole (12) is used to inject an electrolyte solution into the cavity (11); An electrode rod (3) extends from one end of the liquid injection hole (12) of the bamboo tube (1) into the cavity (11) and is electrically connected to the electrolyte solution; The electrolyte solution in the cavity (11) undergoes ion exchange with the soil through the degradable permeable component (2); The degradable permeable component (2) comprises a plurality of densely arranged bamboo threads (22), and the plurality of bamboo threads (22) are arranged along the extension direction of the bamboo tube (1).

2. The reference electrode according to claim 1, characterized in that The degradable permeable component (2) has a curved surface structure (21) for contacting soil.

3. The reference electrode according to claim 1 or 2, characterized in that A first bamboo node (13) is provided at one end of the bamboo tube (1), the liquid injection hole (12) is provided on the first bamboo node (13), the first bamboo node (13) is provided with a through hole for the electrode rod (3) to extend into the cavity (11), and the electrode rod (3) is sealed and fixed to the through hole.

4. The reference electrode according to claim 3, characterized in that An installation opening (14) for installing the degradable permeable component (2) is provided at one end of the bamboo tube (1) away from the first bamboo node (13).

5. The reference electrode according to claim 4, characterized in that The diameter of the bamboo filaments (22) is less than 1 mm, and the gaps between the bamboo filaments (22) are less than 0.5 mm.

6. The reference electrode according to claim 5, characterized in that The degradable permeable component (2) further comprises a fastener (23), wherein the fastener (23) is sleeved on the outer periphery of the plurality of bamboo filaments (22), and the outer periphery of the fastener (23) abuts against the installation opening (14).

7. The reference electrode according to any one of claims 1, 5 and 6, characterized in that The degradable permeable component (2) further comprises an adhesive (24) filled in gaps between the plurality of bamboo filaments (22), and the plurality of bamboo filaments (22) are fixed and formed by the adhesive (24).

8. The reference electrode according to claim 7, characterized in that The adhesive (24) is also disposed around the outer periphery of the plurality of bamboo filaments (22).

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