A focused coupling electrode for hardened field detection

Abstract

The present invention discloses a focused coupling electrode for hardened field detection, including a lead, a top cover, a copper cake, an outer shell with upper and lower openings, clay, a bottom seal, and a coupling bag. The top cover is screwed to the upper part of the outer shell through a thread, the bottom seal seals the bottom of the outer shell, the lead passes through the top cover and is welded to the copper cake, so that the copper cake is suspended and fixed on the inner side of the top cover, the clay fills the inner part of the outer shell and the top cover, and the coupling bag filled with clay is sleeved on the bottom of the bottom seal of the outer shell. The outer contour of the top cover and the outer shell is a rotating surface with a parabola as the generatrix and a parabola symmetry axis as the rotation axis. The material of the top cover and the outer shell is organic glass. The copper cake is fixed at the focus position of the parabola, and the geometric center of the copper cake coincides with the focus of the parabola. The present invention designs the outer shell into a rotating surface based on the parabola, and fixes the copper cake electrode at the focus position to realize the focused power supply of the current to improve the detection resolution. There is no need to drive the electrode into the ground, and it can be directly placed in the corresponding position, which greatly improves the work efficiency.

Description

Technical Field

[0001] The present invention relates to a coupling electrode, in particular to a focusing coupling electrode for hardened site detection, which can be widely used in electrical detection of hardened sites (such as municipal roads, airports, squares, dams, etc.) to detect the distribution of media and structures under the hardened sites. Background Art

[0002] Electrical detection is a type of geophysical method that is based on the differences in electrical properties between media. It is used to infer underground geological structures and find underground electrically inhomogeneous bodies by observing and analyzing the spatial distribution characteristics of these electrical differences. It is one of the most effective means of engineering geological detection. However, in the detection of hardened sites such as municipal roads, airports, and dams, electrical detection is often difficult to carry out due to the difficulty in laying electrodes and the excessive grounding resistance. It is even more helpless for minor lesions in hardened sites (such as crack leakage, voids, and cavities).

[0003] In electrical detection, the commonly used electrodes are rod-shaped metal electrodes. Such rod-shaped electrodes are difficult to drive into the ground in hardened sites, have poor coupling with the site and may cause damage to the site. Grounding resistance is an important factor affecting the quality of electrical data acquisition. If the grounding resistance is too large, it will lead to a decrease in power supply current and a weakened observation signal, thereby reducing the detection depth and observation accuracy. Traditional methods to reduce grounding resistance mainly include digging electrode pits at the locations where electrodes are to be laid, pouring salt water around the electrodes, combining electrodes, etc. However, the resistivity of concrete on the surface of hardened sites is often high, which is not conducive to current supply. The above methods to reduce grounding resistance are difficult to achieve the desired effect in hardened sites and are inefficient.

[0004] If minor lesions on hardened sites, such as cracks in dams, voids and cavities under airports and roads, are not detected and treated in time and allowed to develop, they will often lead to major accidents, which have been reported repeatedly in recent years. Compared with traditional geological detection, such problems are smaller in scale and require higher detection accuracy, which are difficult to distinguish with conventional detection technology. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a focusing coupling electrode for hardened site detection, which has a current focusing function and realizes high-resolution detection of the hardened site.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a focused coupling electrode for hardened field detection, including a lead, a top cover, a copper cake, an outer shell with upper and lower openings, clay, a bottom seal, and a coupling bag. The top cover is screwed to the upper part of the outer shell through a thread, and the bottom seal seals the bottom of the outer shell. The lead passes through the top cover and is welded to the copper cake so that the copper cake is suspended and fixed on the inner side of the top cover. The clay fills the inside of the outer shell and the top cover, and the coupling bag filled with clay is covered at the bottom of the bottom seal of the outer shell.

[0007] The top cover and the outer contour of the shell are rotation surfaces with a parabola as the generatrix and the axis of symmetry of the parabola as the rotation axis. The top cover and the shell are made of organic glass. The copper cake is fixed at the focus of the parabola, and the geometric center of the copper cake coincides with the focus of the parabola.

[0008] The height of the top cover is equal to the focal length of the parabola.

[0009] The outer surfaces of the housing and the top cover are parabolic A surface of revolution with the generatrix as the generating line and the parabola's axis of symmetry as the axis of rotation.

[0010] The copper cake is fixed at the center of the bottom of the top cover. The copper cake has a diameter of 2 cm and a thickness of 1 cm. The height of the top cover is 1 cm, the height of the outer shell is 8 cm, and the bottom diameter is 12 cm.

[0011] The bottom seal is a cotton cloth, which is used to seal the clay and reduce the uneven distribution of the clay.

[0012] The coupling bag is a cotton bag, which can be deformed at will after being filled with clay, thereby increasing the coupling with the site.

[0013] The lead wire is connected to an external transmission cable through a clip for power supply and signal transmission.

[0014] The beneficial effects of the present invention are: providing a new focused coupling electrode, which can increase the coupling between the electrode and the hardened site, reduce the grounding resistance, and thus improve the quality of electrical detection data acquisition, providing a practical way for electrical detection of hardened sites; through current focusing, high-resolution detection of tiny lesions in hardened sites can be achieved; compared with traditional electrodes, the coupling electrode can be directly placed in the site and connected to the transmission cable for detection, which can truly achieve non-destructive detection of the hardened site and greatly improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the focusing coupling electrode used for hardened field detection according to the present invention. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0017] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] like Figure 1 As shown, the focusing coupling electrode for hardened field detection of the present invention includes a lead 1, a top cover 2, a copper cake 3, an outer shell 4 with upper and lower openings, clay 5, a bottom seal 6, and a coupling bag 7. The top cover 2 is screwed to the upper part of the outer shell 4 through a thread, the bottom seal 6 seals the bottom of the outer shell 4, the lead 1 passes through the top cover 2 and is welded to the copper cake 3, so that the copper cake 3 is suspended and fixed on the inner side of the top cover 2, the clay 5 fills the inner part of the outer shell 4 and the top cover 2, and the coupling bag 7 containing the clay 5 is sleeved on the bottom of the bottom seal 6 of the outer shell.

[0020] The outer contour of the top cover 2 and the outer shell 4 is a rotation surface with a parabola as the generatrix and the axis of symmetry of the parabola as the rotation axis. The material of the top cover 2 and the outer shell 4 is organic glass. The copper cake 3 is fixed at the focus position of the parabola, and the geometric center of the copper cake 3 coincides with the focus of the parabola.

[0021] The height of the top cover 2 is equal to the focal length of the parabola.

[0022] Preferably, the outer surfaces of the housing 4 and the top cover 2 are parabolic A surface of revolution with the generatrix as the generating line and the parabola's axis of symmetry as the axis of rotation.

[0023] Preferably, the copper cake 3 is fixed at the center of the bottom of the top cover 2, the copper cake 3 has a diameter of 2 cm and a thickness of 1 cm, the top cover 2 has a height of 1 cm, the shell 4 has a height of 8 cm, and the bottom diameter is 12 cm.

[0024] The bottom seal 6 is made of cotton cloth, which is used to seal the clay 5 and reduce the uneven distribution of the clay 5.

[0025] The coupling bag 7 is a cotton bag, which can be deformed at will after being filled with clay 5 to increase the coupling with the site.

[0026] The lead wire 1 is connected to an external transmission cable through a clip for power supply and signal transmission.

[0027] Specifically, the top cover 2 is connected to the outer shell 4 by a thread, and the clay, copper cake and pouring salt water can be replaced or supplemented by unscrewing the top cover 2. The outer shell 4 is the packaging part of the entire focusing coupling electrode, and each component is connected to the organic glass outer shell 4; the outer shell is designed as a rotating surface with a parabola as the generatrix, and the material of the outer shell is organic glass. The center of the copper cake 3 is fixed at the focal position of the outer shell, which can realize the focusing power supply of the current, and then realize the high-resolution detection of the hardened site. Clay 5 is used as a coupling agent to fill the entire outer shell 4 and the coupling bag 7. After being soaked in salt water, the coupling between the electrode and the site is increased and the grounding resistance is reduced. The bottom seal 6 is cotton cloth, which is used to seal the clay 5 and reduce the uneven distribution of the clay 5. The coupling bag 7 is a cotton bag, which can be deformed at will after being filled with clay 5 to increase the coupling with the site.

[0028] The specific implementation process of the present invention is as follows:

[0029] 1. Put the bottom seal 6 on the bottom of the shell 4;

[0030] 2. Fill the entire shell 4 with fine-grained clay 5 and compact it;

[0031] 3. Fill the space outside the copper cake 3 in the top cover 2 with clay 5 and compact it;

[0032] 4. Fill the coupling bag 7 with clay, and put the coupling bag 7 on the housing 4 through a rubber band;

[0033] Slowly inject 5% salt water into the electrode and the top cover 2 through the top of the shell 4 until the salt water completely soaks the clay 5, and then screw the top cover 2 and the shell 4 together. At this point, the coupling electrode is assembled.

[0034] According to the designed survey line, place the focused coupling electrode at the corresponding position. The electrode must be placed vertically on the ground and needs to be pressed to fully couple the electrode with the ground. Connect the focused coupling electrode to the transmission cable through a clip and connect it to the main unit to carry out electrical detection.

[0035] When using traditional electrodes for electrical detection, the electrodes need to be driven into the ground, which is often difficult to achieve in hardened sites, with low work efficiency and damage to the hardened sites. In addition, since the resistivity of hardened ground is often high, it is difficult to supply current into the ground, which leads to limited detection depth. The present invention increases the coupling between the electrode and the site through a coupling agent, reduces the ground resistance, and in addition, when detecting, the electrode can be placed in the corresponding position and pressed without being driven into the ground, which not only improves work efficiency but also does not cause damage to the site.

[0036] The embodiments described above are only used to illustrate the technical ideas and features of the present invention, and their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. The patent scope of the present invention cannot be limited only by this embodiment, that is, any equivalent changes or modifications made to the spirit disclosed by the present invention still fall within the patent scope of the present invention.

Claims

1. A focused coupling electrode for hardened field detection, characterized in that: The invention comprises a lead wire (1), a top cover (2), a copper cake (3), an outer shell (4) with upper and lower openings, clay (5), a bottom seal (6), and a coupling bag (7). The top cover (2) is screwed to the upper part of the outer shell (4) through a thread, the bottom seal (6) seals the bottom of the outer shell (4), the lead wire (1) passes through the top cover (2) and is welded to the copper cake (3), so that the copper cake (3) is suspended and fixed on the inner side of the top cover (2), the clay (5) fills the inner part of the outer shell (4) and the top cover (2), and the coupling bag (7) filled with the clay (5) is provided. The closing bag (7) is sleeved on the bottom of the bottom seal (6); the outer contours of the top cover (2) and the outer shell (4) are rotational curved surfaces with a parabola as the generatrix and a parabola symmetry axis as the rotation axis; the top cover (2) and the outer shell (4) are made of organic glass; the copper cake (3) is fixed at the focal position of the parabola; the geometric center of the copper cake (3) coincides with the focal point of the parabola; the height of the top cover (2) is equal to the focal length of the parabola; the outer surfaces of the outer shell (4) and the top cover (2) are parabolic. The copper cake (3) is fixed at the center of the bottom of the top cover (2). The copper cake (3) has a diameter of 2 cm and a thickness of 1 cm. The top cover (2) has a height of 1 cm. The outer shell (4) has a height of 8 cm and a bottom diameter of 12 cm.

2. The focused coupling electrode for hardened field detection according to claim 1, characterized in that: The bottom seal (6) is a cotton cloth, which is used to seal the clay (5) and reduce the uneven distribution of the clay (5).

3. The focused coupling electrode for hardened field detection according to claim 1, characterized in that: The coupling bag (7) is a cotton bag, which can be deformed at will after being filled with clay (5), thereby increasing the coupling with the site.

4. The focused coupling electrode for hardened field detection according to claim 1, characterized in that: The lead wire (1) is connected to an external transmission cable via a clip for power supply and signal transmission.

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