Seismic sensor coupling structure

Abstract

The utility model discloses a seismic sensor coupling structure, which comprises a tailstock arranged on the surface of a medium to be coupled and a sensor arranged on the tailstock, three supporting legs are uniformly distributed at the bottom of the tailstock, and the tip of each supporting leg is a linear or arc cutting edge. The three-foot tail cone structure is adopted, the appearance structure of the supporting foot is optimized, and each tail cone is replaced by a locally concentrated short straight line or arc cutting edge, so that the coupling rigidity function of the supporting foot is ensured, and meanwhile, the inadaptability of a single-point supporting foot to local unevenness is overcome.

Description

Technical Field

[0001] This utility model belongs to the field of geological exploration technology, and in particular relates to a seismic sensor coupling structure. Background Technology

[0002] In seismic exploration or ultrasonic testing, sensors are coupled to the surface of the medium. Higher coupling stiffness results in a higher signal-to-noise ratio and better detection performance. However, on hard surfaces such as roads or concrete structures, sensor tail cones cannot be used. Two methods are generally employed: one is to hold the sensor by hand, but this makes it difficult to accurately determine the coupling direction, and the hand action can negatively impact the sensor's receiving performance; the other is to use a flat-bottomed tailstock instead of a tail cone for assistance. If necessary, plaster or cement can be used to fix the tailstock to the surface to effectively detect vibration signals. However, because the flat-bottomed tailstock has a large ground contact area, and the surface may not be perfectly flat or contain sand, the sensor may not achieve adequate coupling stiffness. Summary of the Invention

[0003] The main purpose of this invention is to provide a seismic sensor coupling structure, which adopts a three-legged tail cone structure and optimizes the shape of the support legs by replacing each tail cone with locally concentrated short straight lines or arcs (cutting edges). This ensures the coupling stiffness function of the support legs while overcoming the incompatibility of single-point support legs with local unevenness.

[0004] Therefore, the seismic sensor coupling structure provided by this utility model includes a tailstock disposed on the surface of the medium to be coupled and a sensor disposed on the tailstock. Three support feet are evenly distributed at the bottom of the tailstock, and the tip of each support foot is a straight or curved blade, so that the tip of each support foot is in line contact with the surface of the medium to be coupled.

[0005] Specifically, the upper surface of the tailstock has a recessed cavity at its center, and a magnetic body is embedded and fixed in the bottom of the recessed cavity. The bottom center of the sensor has a permanent magnet boss. When the permanent magnet boss is installed in the recessed cavity, the sensor maintains close contact with the upper surface of the tailstock under the magnetic attraction provided by the permanent magnet boss.

[0006] Specifically, the sensor housing is a non-magnetic housing.

[0007] Specifically, the tailstock is made of aluminum alloy or ceramic.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] It adopts a three-legged tail cone structure, but the shape of the legs is optimized by replacing each tail cone with short, concentrated straight lines or arcs (cutting edges). This ensures the coupling stiffness of the support legs while overcoming the incompatibility of single-point support legs with local unevenness.

[0010] The sensor is magnetically fixed to the tailstock, making sensor installation quick and convenient. Compared with traditional bolt fixing, it greatly improves the efficiency of field operations and avoids local resonance caused by screw tightening. Its contact surface can form a flexible contact layer within a certain range, acting as a "dynamic shock absorber" to absorb high-frequency vibration energy and ensure signal quality within the effective frequency band.

[0011] The sensor uses a non-magnetic shell design to eliminate external magnetic interference and eddy current effects, ensuring the physical purity of data acquisition; the tailstock uses a non-magnetic material to effectively suppress resonance. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the earthquake sensor coupling structure provided in this embodiment of the utility model. Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the tailstock from below provided in an embodiment of the present invention. Figure 1 ;

[0015] Figure 3 This is a schematic diagram of the earthquake sensor coupling structure provided in this embodiment of the utility model. Figure 2 ;

[0016] Figure 4 This is a schematic diagram of the tailstock from below provided in an embodiment of the present invention. Figure 2 ;

[0017] The components are: 1. Tailstock; 2. Support foot; 3. Toe; 4. Cavity; 5. Permanent magnet boss; 6. Sensor; 7. Magnetic body; 8. Cutting edge. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] See Figure 1 and Figure 2 An earthquake sensor coupling structure includes a tailstock 1 disposed on the surface of the medium to be coupled and a sensor 6 disposed on the tailstock 1. Three support feet 2 are evenly distributed at the bottom of the tailstock 1. The tip of each support foot is notched to form an arc-shaped blade 8, so that the tip 3 of each support foot 2 is in line contact with the surface of the medium to be coupled.

[0022] In this embodiment, a three-legged tail cone structure is adopted, but the shape of the legs is optimized so that they maintain line contact with the surface of the medium to be coupled, thus replacing each tail cone. This ensures the coupling stiffness function of the support leg 2, while also overcoming the incompatibility of the single-point support leg 2 with local unevenness.

[0023] See Figure 3 and Figure 4 In some embodiments, the support feet 2 are arranged in an equilateral triangle around the cylindrical tailstock, and the toe 3 can also be designed as a straight cutting edge 8, so that the toe 3 of each support foot 2 is in line contact with the surface of the medium to be coupled.

[0024] See Figure 1 and Figure 3 It is understandable that in the actual design, the upper surface (fitting platform) of the tailstock 1 is provided with a cavity 4 in the center, and a magnetic body 7 made of a material such as ferromagnetic material is embedded and fixed in the bottom of the cavity 4. The bottom center of the sensor 6 is provided with a permanent magnet boss 5 made of permanent magnet material. When the permanent magnet boss 5 is matched and installed in the cavity 4, the sensor 6 maintains close contact with the fitting platform of the tailstock 1 under the magnetic attraction provided by the permanent magnet boss 5.

[0025] In this embodiment, the boss at the bottom of the sensor 6 and the cavity 4 of the tailstock 1 adopt a magnetic bonding design, which enables the sensor 6 to be installed quickly. Compared with traditional bolt fixing, the efficiency of field operations is greatly improved, and the local resonance caused by screw tightening is avoided. Its bonding surface can form a flexible contact layer within a certain range, which acts as a "dynamic shock absorber" to absorb high-frequency vibration energy and ensure the signal quality within the effective frequency band.

[0026] In particular, when the housing of sensor 6 is made of non-magnetic material, external magnetic interference and eddy current effects can be effectively eliminated, ensuring the physical purity of data acquisition. In addition, ferromagnetic materials have high elastic modulus and are easy to form mechanical resonance with the internal structure of sensor 6. When the tailstock is made of non-magnetic materials such as aluminum alloy or ceramic, the generation of resonance can be effectively suppressed.

[0027] In use, the sensor 6 is magnetically connected to the cavity 4 on the upper surface of the tailstock 1 via a protrusion containing a permanent magnet at its bottom, thus completing the installation and fixation of the sensor 6 to the tailstock, allowing relevant exploration work to commence. The tailstock of the sensor 6 is lightweight and easy to disassemble. Except for the magnetic material embedded in the cavity 4 for attracting permanent magnets, the rest, such as the support legs 2, are made of rigid materials such as hard aluminum alloy and ceramic, minimizing the additional effect of the mass of the tailstock 1 on the performance of the sensor 6. This invention's tailstock is widely suitable for various surface seismic exploration data acquisition scenarios, such as uneven hard surfaces like sand and gravel, rock slopes, and soft media surfaces like deserts and soil.

[0028] Unless otherwise stated, if any of the technical solutions disclosed in this utility model discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Anyone skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this utility model discloses only some numerical values ​​to illustrate the technical solutions of the invention. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this invention.

[0029] Meanwhile, if the present invention discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured by casting) (except where it is obviously impossible to use an integral forming process).

[0030] Furthermore, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model include states or shapes that are similar to, analogous to, or close to those states or shapes. Any component provided by this utility model can be assembled from multiple individual components or can be a single component manufactured using a one-piece molding process.

[0031] The above embodiments are merely illustrative examples to clearly illustrate the present invention, and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A seismic sensor coupling structure, comprising a tailstock (1) disposed on the surface of a medium to be coupled and a sensor (6) disposed on the tailstock (1), characterized in that: The bottom of the tailstock (1) is evenly distributed with three support feet (2), and the tip (3) of each support foot (2) is a straight or curved cutting edge (8).

2. The coupling structure of the seismic sensor (6) according to claim 1, characterized in that: The upper surface of the tailstock has a cavity (4) at its center. A magnetic body (7) is embedded and fixed in the bottom of the cavity (4). The sensor (6) has a permanent magnet boss (5) at its bottom center. When the permanent magnet boss (5) is installed in the cavity (4), the sensor (6) maintains close contact with the upper surface of the tailstock (1) under the magnetic attraction provided by the permanent magnet boss (5).

3. The seismic sensor coupling structure according to claim 2, characterized in that: The sensor (6) has a non-magnetic housing.

4. The seismic sensor coupling structure according to claim 2, characterized in that: The tailstock is made of aluminum alloy or ceramic.

Images