A spherical landmarking device

Abstract

The utility model provides a kind of spherical ground marker, it is related to ground marking and signal sending device technical field, including upper shell, lower shell and coil assembly;Upper shell and lower shell are sealingly connected, the inner bottom of lower shell is filled with liquid filler, coil assembly is horizontally suspended above liquid filler, the outside of coil assembly is equipped with the sealing cover body for isolating it from liquid filler;Coil assembly includes inverted framework, its outside is equipped with annular step that diameter reduces gradually from top to bottom, the coil that is connected in series is wound on each annular step, and coil end is electrically connected to pad.Keep horizontal by suspension design to ensure coil, step coil layout optimizes magnetic field, pad and capacitor cooperate to facilitate adjustment of operating frequency, with the advantages of high stability, good detection accuracy, frequency adjustable, strong adaptability and long service life.

Description

Technical Field

[0001] This utility model relates to the technical field of ground marking and signal transmission devices, and more specifically, to a spherical ground marker. Background Technology

[0002] In fields such as geological exploration, engineering surveying, and underground pipeline location, it is often necessary to bury or place landmarks in specific locations to continuously transmit signals of a specific frequency to a ground receiver for precise positioning and tracking of equipment. Existing landmarks of this type mostly employ a simple housing encapsulating a coil structure.

[0003] In practical use, especially in environments with uneven ground or potential external interference (such as wind or animal collisions), landers are prone to tilting, rolling, or shaking, causing their internal signal transmission coils to deviate from their optimal horizontal state, thus severely affecting the stability of signal transmission and the accuracy of reception. Furthermore, traditional landers typically operate at a fixed frequency, making it impossible to flexibly adapt or adjust them according to the frequency requirements of on-site testing equipment, resulting in insufficient application flexibility. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the existing landmark is prone to shaking, resulting in unstable signal and unadjustable frequency. In order to overcome the above defects of the existing technology, this utility model provides a spherical landmark.

[0005] This invention provides a spherical landmark, including an upper housing, a lower housing, and a coil assembly for transmitting signals to a ground receiver, wherein the upper housing and the lower housing are sealed together and together form a spherical structure; The lower housing is filled with a liquid filler; the coil assembly is placed inside the lower housing and suspended above the liquid filler; the coil assembly is covered with a sealing cover to isolate it from the liquid filler. The coil assembly includes an inverted frame with multiple annular steps extending circumferentially and decreasing in diameter from top to bottom on the outer wall of the frame. Multiple turns of coil are wound on each annular step, and the coils on adjacent annular steps are connected in series. The two ends of the coils connected in series on each annular step are electrically connected to a capacitor.

[0006] Compared with existing technologies, the spherical lander disclosed in this application has the following advantages: by filling the lower housing with liquid filler, the coil assembly is suspended above the liquid filler and can adaptively adjust with the liquid level to ensure that the coil is always in a horizontal state, thereby ensuring the stability of the signal transmission direction and the detection accuracy; the inverted frame combined with the annular stepped coil layout with the diameter decreasing from top to bottom optimizes the magnetic field distribution and enhances the signal strength and coverage uniformity; the sealed cover isolates the coil assembly and the liquid filler, ensuring that the coil assembly can work stably and normally; the overall structure is compact and well-sealed, effectively protecting the internal components and improving the environmental adaptability and service life of the lander.

[0007] In one possible implementation, a circuit board is fixed to the bottom of the frame, and multiple pairs of pads of different specifications are connected in parallel on the circuit board; the coils connected in series on each of the annular steps have their final two ends electrically connected to the pads on the circuit board; and the capacitor is electrically connected to the pads.

[0008] Compared with existing technologies, the circuit board has multiple pairs of pads with different specifications, which facilitates the connection of capacitors of different specifications and also enables multiple capacitors to be connected in parallel. This allows for flexible adjustment of the resonant frequency by adjusting the capacitors, adapting to different ground receiving equipment, and improving the product's versatility and application flexibility.

[0009] In one possible implementation, the sealing cover includes a bottom cover and a top cover; the bottom cover has side walls and a bottom wall to form a cavity for accommodating a skeleton and a circuit board, the skeleton is fixed in the cavity, and the top cover is disposed on top of the skeleton and is sealed to the top edge of the bottom cover.

[0010] Compared with existing technologies, the combination of the bottom cover and the cover forms a reliable sealing barrier, completely eliminating the risk of liquid fillers seeping into and corroding coils, circuit boards and solder joints, ensuring the long-term stability and safety of electrical connections; the split cover structure facilitates assembly and maintenance, and can achieve independent and comprehensive protection of core electronic components, significantly improving the internal protection level and overall durability of the marker in complex environments such as humidity and temperature differences, thereby ensuring long-term reliable signal transmission performance.

[0011] In one possible implementation, the circuit board is fixed to the bottom of the frame by screws or adhesive.

[0012] Compared with existing technologies, it provides a robust and reliable mechanical connection, ensuring that the circuit board and the precision electronic components such as pads and capacitors it carries do not shift or fall off in environments with equipment shaking or long-term vibration, effectively maintaining the integrity of the circuit connection.

[0013] In one possible implementation, the bottom of the frame has several positioning posts protruding downward along the circumference of the circuit board, and the bottom of the bottom cover has positioning grooves that match the shape and number of the positioning posts; the positioning posts are inserted into the corresponding positioning grooves, so that the coil assembly can be radially limited and circumferentially prevented from rotating inside the bottom cover.

[0014] Compared with existing technologies, the positioning pins and positioning slots enable rapid and precise positioning and assembly between the base cover and the frame, effectively preventing installation misalignment and ensuring the installation quality of the sealed cover. At the same time, the mechanical interlocking structure can firmly restrict the lateral displacement and rotation of the coil assembly within the cover when the equipment shakes or tilts, enhancing the overall stability and impact resistance of the internal structure. This ensures that the relative position of the coil and the circuit board is fixed, further improving the consistency of signal transmission and the long-term reliability of the landmark.

[0015] In one possible implementation, the cover and the bottom cover are sealed by ultrasonic welding.

[0016] Compared with existing technologies, it can generate molecular-level fusion at the interface between the two, forming a continuous, uniform and gapless permanent sealing weld, which fundamentally eliminates the possibility of liquid penetration or gas entry, and the sealing reliability is extremely high.

[0017] In one possible implementation, each of the annular steps has at least one circumferential groove on its sidewall for accommodating the series connection of adjacent coils, the bottom of which is lower than the outer circumferential surface of the annular step sidewall.

[0018] Compared with existing technologies, this method provides a neat, concealed, and mechanically protected routing channel for the connecting wires of coils on adjacent annular steps connected in series. This effectively avoids wire drooping, tangling, or interference with the external sealing cover. It not only improves the neatness of the internal wiring and assembly efficiency of the coil assembly, but also fundamentally eliminates the risk of short circuits, open circuits, or unstable signal transmission caused by wire bending, displacement, or insulation wear. This significantly enhances the reliability of electrical connections and the long-term stability of the overall operation of the landmark.

[0019] In one possible implementation, the outer surface of the upper housing is provided with two symmetrically distributed lugs, and the lugs are provided with through holes.

[0020] Compared with existing technologies, it provides a stable and reliable mechanical fixing point, which allows the marker to be easily and securely connected to external attachments by ropes, cable ties or bolts, effectively preventing it from rolling or slipping in complex outdoor environments. Attached Figure Description

[0021] Figure 1 This is an exploded schematic diagram of a spherical landmark according to the present invention; Figure 2 This is a schematic diagram of the coil assembly structure of a spherical landmark according to the present invention; Figure 3 This is a schematic diagram of the bottom cover structure of a spherical landmark according to the present invention; Figure 4 This is a schematic diagram of the overall structure of a spherical landmark according to the present invention; Figure 5 This is a cross-sectional view of a spherical landmark according to the present invention.

[0022] Explanation of reference numerals in the attached figures: 1-Upper shell; 11-Hook part; 2-Lower shell; 3-Liquid filler; 4-Coil assembly; 41-Frame; 411-Annular step; 412-Coil; 413-Trace groove; 414-Positioning post; 42-Circuit board; 421-Pad; 5-Sealing cover; 51-Bottom cover; 511-Positioning groove; 52-Cap. Detailed Implementation

[0023] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0024] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0025] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] See Figures 1-5 As shown in the figure, this application discloses a spherical landmark, including an upper housing 1, a lower housing 2, and a coil assembly 4 for transmitting signals to a ground receiver.

[0028] The upper housing 1 and the lower housing 2 are sealed together to form a hollow spherical structure. Specifically, the upper housing 1 and the lower housing 2 can be sealed together using threads or snap-fit ​​structures, along with a sealing ring. This structure provides stable and reliable connection strength and sealing effect, effectively resisting the intrusion of external moisture and dust, and ensuring a stable working environment for the internal components.

[0029] In this embodiment, the lower housing 2 is filled with liquid filler 3, giving the lower housing 2 a top-light, bottom-heavy, roly-poly shape. The coil assembly 4 is placed horizontally inside the lower housing 2 and suspended above the liquid filler 3. Meanwhile, the coil assembly 4 is fitted with a sealing cover 5 to isolate it from the liquid filler 3, preventing short circuits.

[0030] By filling the bottom of the lower housing 2 with liquid filler 3 to form a self-righting structure, the anti-tipping and anti-shaking ability of the landmark is significantly improved, enabling it to automatically maintain vertical stability in complex environments; the coil assembly 4 is suspended above the liquid and can adaptively adjust with the liquid level to ensure that the coil 412 is always in a horizontal state, thereby ensuring the stability of the signal transmission direction and the detection accuracy.

[0031] In practical use, a liquid injection port can be provided on the upper housing 1. First, the coil assembly 4 and the sleeved sealing cover 5 are placed into the lower housing 2; then, the upper housing 1 and the lower housing 2 are installed together and sealed by ultrasonic welding; next, liquid filler 3 is injected through the liquid injection port; finally, the liquid injection port is sealed by injection molding.

[0032] See Figure 2 As shown, the coil assembly 4 includes an inverted frustum-shaped frame 41. The outer wall of the frame 41 is provided with a plurality of annular steps 411 extending in the circumferential direction and decreasing in diameter from top to bottom. Multiple coils 412 are wound on each annular step 411, and the coils 412 on adjacent annular steps 411 are connected in series.

[0033] A circuit board 42 is fixedly mounted on the bottom of the frame 41. Multiple pairs of pads 421 of different specifications are connected in parallel on the circuit board 42. At least one pair of pads 421 is connected to a capacitor. The coils 412 connected in series on each annular step 411 are electrically connected to the pads 421 on the circuit board 42 at their two ends.

[0034] The system employs an inverted frustum-shaped frame 41 with coils 412 arranged in a ring-shaped step 411 with a diameter decreasing from top to bottom, optimizing the magnetic field distribution and enhancing signal strength and coverage uniformity. The circuit board 42 has multiple pairs of solder pads 421 of different specifications connected to capacitors, which allows for flexible adjustment of the resonant frequency by replacing capacitors, adapting to different ground receiving equipment and improving the product's versatility and application flexibility. The overall structure is compact and well-sealed, effectively protecting internal components and improving the environmental adaptability and service life of the grounding device.

[0035] To achieve miniaturization, surface mount capacitors are used and mounted on the circuit board 42. Multiple pairs of pads 421 with different specifications are used to mount surface mount capacitors of different specifications. The size of the surface mount capacitors can be 0201, 0402, 0603, 0805, 1206, etc.

[0036] The liquid filler 3 is antifreeze to prevent the coil assembly 4 from freezing due to low winter temperatures.

[0037] See Figure 1 As shown, the sealing cover 5 includes a bottom cover 51 and a cover 52; the bottom cover 51 has side walls and a bottom wall, forming a cavity for accommodating the skeleton 41 and the circuit board 42, the skeleton 41 is fixed in the cavity, and the cover 52 is disposed on the top of the skeleton 41 and is sealed to the top edge of the bottom cover 51.

[0038] The bottom cover 51 and the cover 52 work together to form a reliable sealing barrier, completely eliminating the risk of liquid filler 3 seeping into and corroding coil 412, circuit board 42 and solder joints, ensuring the long-term stability and safety of electrical connections; the split cover structure is easy to assemble and maintain, and can achieve independent and comprehensive protection of core electronic components, significantly improving the internal protection level and overall durability of the marker in complex environments such as humidity and temperature differences, thereby ensuring long-term reliable signal transmission performance.

[0039] join Figure 2 and Figure 3 As shown, the bottom of the frame 41 has several positioning posts 414 protruding downward along the circumference of the circuit board 42. The bottom of the bottom cover 51 has a corresponding positioning groove 511 that matches the shape and number of the positioning posts 414. The positioning posts 414 are inserted into the corresponding positioning grooves 511, so that the coil assembly 4 can be radially limited and circumferentially prevented from rotating inside the bottom cover 51.

[0040] The positioning pins 414 and positioning slots 511 enable rapid and precise positioning and assembly between the base cover 51 and the frame 41, effectively preventing misalignment and ensuring the installation quality of the sealed cover 5. Simultaneously, this mechanical interlocking structure firmly restricts the lateral displacement and rotation of the coil assembly 4 within the cover when the equipment shakes or tilts, enhancing the overall stability and impact resistance of the internal structure. This ensures the relative position of the coil 412 and the circuit board 42 is fixed, further improving the consistency of signal transmission and the long-term reliability of the landmark.

[0041] In practical use, a positioning groove can be set at the bottom of the frame 41, and a positioning post can be set at the inner bottom of the base cover 51, and the two can be used together to achieve installation. Alternatively, the two installation methods mentioned above can be combined to improve the fixing effect.

[0042] The cover 52 and the bottom cover 51 are sealed by ultrasonic welding. This creates a molecular-level fusion at the interface between the two, forming a continuous, uniform, and gapless permanent sealing weld, fundamentally eliminating the possibility of liquid penetration or gas ingress, resulting in extremely high sealing reliability.

[0043] See Figure 2 As shown, each annular step 411 has at least one routing groove 413 on its sidewall circumferentially for accommodating the series connection of adjacent coils 412. The bottom of the routing groove 413 is lower than the outer circumferential surface of the sidewall of the annular step 411.

[0044] The wiring groove 413 provides a neat, concealed, and mechanically protected routing channel for the connecting wires of the coils 412 on the adjacent annular steps 411 connected in series. This effectively prevents the wires from dangling, tangling, or interfering with the external sealing cover 5. It not only improves the neatness of the wiring inside the coil assembly 4 and the assembly efficiency, but also fundamentally eliminates the risk of short circuits, open circuits, or unstable signal transmission caused by wire bending, displacement, or insulation wear. This significantly enhances the reliability of the electrical connection and the long-term stability of the overall operation of the landmark.

[0045] See Figure 4 As shown, the outer surface of the upper housing 1 is provided with two symmetrically distributed hanging ears 11, and the hanging ears 11 are provided with through holes. This provides a stable and reliable mechanical fixing point, allowing the marker to be easily and securely connected to external attachments by ropes, cable ties or bolts, effectively preventing it from rolling or slipping in complex outdoor environments.

[0046] In this embodiment, the circuit board 42 is fixed to the bottom of the frame 41 by screws or adhesive. This provides a stable and reliable mechanical connection, ensuring that the circuit board 42 and the precision electronic components such as the solder pads 421 and capacitors it supports do not shift or fall off in environments with equipment shaking or long-term vibration, effectively maintaining the integrity of the circuit connection.

[0047] In the actual production process, different model markings can be set on the outer surfaces of the upper shell 1 and the lower shell 2 to facilitate manual identification, such as using different appearance colors, setting IDs, etc.

[0048] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0049] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A spherical landmark comprising an upper housing (1), a lower housing (2), and a coil assembly (4) for transmitting signals to a ground receiver, wherein the upper housing (1) and the lower housing (2) are sealed together and together form a spherical structure; characterized in that: The lower housing (2) is filled with liquid filler (3); the coil assembly (4) is placed inside the lower housing (2) and suspended above the liquid filler (3); the coil assembly (4) is covered with a sealing cover (5) to isolate it from the liquid filler (3). The coil assembly (4) includes an inverted frame (41). The outer wall of the frame (41) is provided with a plurality of annular steps (411) extending in a circumferential direction and decreasing in diameter from top to bottom. Each annular step (411) is wound with multiple turns of coil (412), and the coils (412) on adjacent annular steps (411) are connected in series. The coils (412) connected in series on each annular step (411) are electrically connected to a capacitor at their two ends.

2. The spherical landmark according to claim 1, characterized in that, The bottom of the frame (41) is fixed with a circuit board (42), and multiple pairs of pads (421) of different specifications are connected in parallel on the circuit board (42). The coils (412) connected in series on each of the annular steps (411) are ultimately electrically connected at their two ends to the pads (421) of the circuit board (42); the capacitor is electrically connected to the pads (421).

3. The spherical landmark according to claim 2, characterized in that, The sealing cover (5) includes a bottom cover (51) and a cover (52); the bottom cover (51) has side walls and bottom walls to form a cavity for accommodating the skeleton (41) and the circuit board (42), the skeleton (41) is fixed in the cavity, and the cover (52) is disposed on the top of the skeleton (41) and is sealed to the top edge of the bottom cover (51).

4. The spherical landmark according to claim 2, characterized in that, The circuit board (42) is fixed to the bottom of the frame (41) by screws or adhesive.

5. The spherical landmark according to claim 3, characterized in that, The bottom of the frame (41) has several positioning posts (414) protruding downward along the circumference of the circuit board (42). The bottom of the base (51) has a corresponding positioning groove (511) that matches the shape and number of the positioning posts (414). The positioning posts (414) are inserted into the corresponding positioning grooves (511) so that the coil assembly (4) is radially limited and circumferentially prevented from rotating inside the base (51).

6. The spherical landmark according to claim 3, characterized in that, The bottom cover (51) and the cover (52) are sealed by ultrasonic welding.

7. The spherical landmark according to claim 1, characterized in that, Each of the annular steps (411) has at least one wiring groove (413) on its sidewall circumferentially for accommodating the series connection of adjacent coils (412) connected in series. The bottom of the wiring groove (413) is lower than the outer circumferential surface of the sidewall of the annular step (411).

8. The spherical landmark according to claim 1, characterized in that, The outer surface of the upper shell (1) is provided with two symmetrically distributed ear parts (11), and the ear parts (11) are provided with through holes.

Images