Flexible ground penetrating radar chassis

Abstract

The utility model discloses a kind of flexible ground penetrating radar bottom plate, it is related to ground penetrating radar technical field, comprising: signal conducting layer, it is located at radar antenna bottom;Flexible buffer layer, it is located on the side-to-side of signal conducting layer and radar antenna connection side;Wear-resistant layer, it is located on the side-to-side of flexible buffer layer and signal conducting layer connection side, the utility model can be by setting signal conducting layer, flexible buffer layer, wear-resistant layer, can improve the contact area of working face and antenna, to reduce electromagnetic wave attenuation, improve data acquisition reliability.

Description

Technical Field

[0001] This utility model relates to the field of ground penetrating radar technology, and in particular to a flexible ground penetrating radar base plate. Background Technology

[0002] Ground-penetrating radar has become a routine detection method for geological anomalies such as fault fracture zones and karst cavities in tunnel early warning.

[0003] The existing ground-penetrating radar base plates are all designed to be rigid. During the detection process, the unevenness of the working face leads to poor contact between the antenna and the rock mass, resulting in severe signal attenuation and seriously affecting the detection accuracy. This can lead to the omission of detection of high-level concealed fractured rock masses and small-scale fissures. Utility Model Content

[0004] To overcome at least one of the defects described in the prior art, this invention provides a flexible ground-penetrating radar base plate. This addresses problems such as poor antenna-rock contact and severe signal attenuation caused by unevenness at the tunnel face.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] A flexible ground-penetrating radar base plate, comprising:

[0007] The signal transmission layer is located at the bottom of the radar antenna;

[0008] A flexible buffer layer is located on the opposite side of the signal conduction layer and the radar antenna connection side;

[0009] The wear-resistant layer is located on the opposite side of the connection between the flexible buffer layer and the signal transmission layer.

[0010] With the above scheme, the signal transmission layer is located at the bottom of the radar antenna, which can efficiently transmit radar signals. The flexible buffer layer can provide buffering and protect the internal precision components from external impacts or vibrations. Its flexibility allows the base plate to improve the coupling of the tunnel face. The wear-resistant layer enhances the wear resistance of the base plate, extends the service life of the equipment, and reduces maintenance costs and frequency.

[0011] Furthermore, the signal transmission layer is made of carbon fiber rubber.

[0012] Through the above-mentioned further solutions, carbon fiber rubber is a conductive composite material composed of a rubber matrix and carbon fiber filler. It has good electromagnetic wave conduction performance, which can effectively transmit electromagnetic signals transmitted and received by radar antennas and reduce signal loss. The rubber matrix gives the material good flexibility and elasticity, allowing it to better conform to the rock mass, which helps to improve the coupling effect between the radar antenna and the rock mass, thereby obtaining higher quality images of underground or mountain structures. Carbon fiber rubber has a certain buffering capacity, which helps to protect the internal components of the radar and extend the service life of the equipment. Compared with traditional metal conductive materials, carbon fiber rubber is lighter, which helps to achieve lightweight ground penetrating radar equipment, making it easier to carry and operate on site.

[0013] Furthermore, the flexible buffer layer is made of porous silicone rubber, and the porosity of the flexible buffer layer is 20%-40%, preferably 30%.

[0014] Through the above-mentioned further solutions, the porous silicone rubber has a large number of uniformly distributed micropores, which gives it good energy absorption and dispersion capabilities. Silicone rubber itself has excellent elasticity and flexibility, and the combination with the porous structure further enhances its deformation adaptability, allowing the radar base plate to better fit the rock mass, improving the coupling efficiency between the radar signal and the rock mass, thereby improving the detection accuracy.

[0015] Furthermore, the pore size of the flexible buffer layer is less than 0.5 mm.

[0016] The above-mentioned further solutions help reduce the impact on the signal transmission layer because smaller holes reduce changes that may interfere with the signal transmission path, ensuring that the signal transmission layer can work efficiently and stably.

[0017] Furthermore, the wear-resistant layer is made of wear-resistant conductive silicone.

[0018] Through the above-mentioned further solutions, wear-resistant conductive silicone has excellent wear resistance, extending the service life of the equipment. The conductive silicone itself has a certain conductivity, which can ensure that the signal returned from the ground is efficiently transmitted to the signal transmission layer and further reaches the radar antenna. This helps to reduce detection errors caused by signal loss and improves the accuracy and reliability of data acquisition. In addition to being beneficial to signal transmission, the conductivity can also provide an electrostatic discharge path in some application scenarios, reducing the safety hazards that may be caused by electrostatic accumulation.

[0019] Furthermore, the signal transmission layer, flexible buffer layer, and wear-resistant layer are integrally formed.

[0020] Through the above-mentioned further solutions, the three layers of materials are tightly bonded together by an integrated molding process to form a complete functional composite structure. This avoids the interlayer peeling, misalignment, or slippage that may occur in traditional layered structures, significantly improving the structural stability and consistency of the base plate during use. The integrated molding process enables good interface bonding between the functional layers, reducing the risk of moisture, dust, or other impurities penetrating, avoiding internal corrosion and decreased conductivity caused by environmental factors, and ensuring uniform deformation and good fit of the base plate. This helps to improve the signal coupling efficiency between the radar antenna and the ground, ensuring the consistency and repeatability of the signal path during each detection process, thereby improving the accuracy and reliability of the detection data.

[0021] Furthermore, the signal transmission layer is embedded within a flexible buffer layer, which in turn is embedded within a wear-resistant layer.

[0022] Furthermore, the signal conduction layer has a groove on its outer periphery, and a permanent magnet is embedded in the groove. The flexible buffer layer has a protrusion on its outer periphery, and a groove is provided in the protrusion, with a permanent magnet embedded in the groove. The conduction layer is located within the protrusion, and the position of the permanent magnet in the signal conduction layer corresponds to the position of the permanent magnet in the protrusion. The wear-resistant layer has a protective edge on its outer periphery, and a groove is provided in the protective edge, with a permanent magnet embedded in the groove. The flexible buffer layer is located within the protective edge, and the position of the permanent magnet in the protrusion corresponds to the position of the permanent magnet in the protective edge.

[0023] In summary, the flexible ground-penetrating radar base plate provided by this utility model has the following technical effects:

[0024] By adding a signal conduction layer, a flexible buffer layer, and a wear-resistant layer, the contact area between the tunnel face and the antenna can be increased, thereby reducing electromagnetic wave attenuation and improving the reliability of data acquisition. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model.

[0028] Figure 3 This is a schematic diagram of the overall structure of Embodiment 3 of this utility model.

[0029] Figure 4 This is a cross-sectional structural diagram of Embodiment 3 of this utility model.

[0030] In the diagram: 1. Signal transmission layer; 2. Flexible buffer layer; 21. Raised edge; 3. Wear-resistant layer; 31. Protective edge. Detailed Implementation

[0031] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 do not 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0034] Example 1:

[0035] refer to Figure 1 As shown, a flexible ground-penetrating radar base plate includes a signal transmission layer 1 located at the bottom of the radar antenna. A flexible buffer layer 2 is provided on the opposite side of the signal transmission layer 1 and the radar antenna. A wear-resistant layer 3 is provided on the opposite side of the flexible buffer layer 2 and the signal transmission layer 1, forming a sandwich structure. The signal transmission layer, located at the bottom of the radar antenna, can efficiently transmit radar signals. The flexible buffer layer provides cushioning, protecting internal precision components from external impacts or vibrations. Its flexibility allows the base plate to improve the coupling of the tunnel face. The wear-resistant layer enhances the wear resistance of the base plate, extends the service life of the equipment, and reduces maintenance costs and frequency.

[0036] refer to Figure 1 and Figure 2 As shown, the signal transmission layer 1 is made of carbon fiber rubber, which has the ability to resist deformation, reduces permanent deformation caused by long-term pressure (deformation rate <5%), ensures the structural stability of the signal transmission layer 1, and avoids affecting the coupling accuracy of the wear-resistant layer 3 due to the collapse of the signal transmission layer 1; it has low weight, which can reduce the weight of the base plate and facilitate the handling of the ground penetrating radar; it has low electromagnetic interference characteristics, and the carbon fibers in the carbon fiber rubber form a dispersed conductive network, which can suppress the electromagnetic noise generated by its own induced current and prevent the signal transmission layer 1 from becoming a strong reflection interface of radar waves.

[0037] The flexible buffer layer 2 is made of porous silicone rubber. The pore structure of the flexible buffer layer 2 has high elasticity and can fill the micro-cracks on the tunnel face, making the wear-resistant layer 3 fit the rock mass better. The pore structure has buffering properties, and the "compression-rebound" characteristics of the pores can absorb construction vibrations (such as aftershocks after blasting), reduce the displacement error of the antenna caused by vibration, and improve data accuracy.

[0038] The porosity of the flexible buffer layer 2 is 20%-40%, preferably 30%. The signal attenuation rate increases linearly with the increase of porosity, but the increase in the 20%-30% range (3%-5%) is less than the signal gain (7%-10%) brought about by the increase in contact area. The net effect is improved signal quality.

[0039] The pore size of the flexible buffer layer 2 is less than 0.5 mm. The wavelength of a 400 MHz radar in air is about 0.75 m. This makes the pore size much smaller than the radar wave wavelength, thus avoiding pore interference with radar detection.

[0040] The wear-resistant layer 3 is made of wear-resistant conductive silicone, which has electromagnetic propagation properties. The dielectric constant of conductive silicone (ε≈3-5) is close to that of rock (most rock masses ε≈4-8), significantly lower than that of traditional rubber (ε≈7-9) or metal (ε→∞). According to electromagnetic theory, the closer the dielectric constants of two media are, the smaller the reflection coefficient at the interface. Reduced reflection energy allows more radar waves to penetrate the interface and enter the rock mass, increasing the effective detection depth. The hardness of conductive silicone is close to that of an eraser, allowing for significant elastic deformation. It can fill the unevenness or micro-cracks of the tunnel face, ensuring a contact area ≥90%. Its flexibility can also help to partially cover the tunnel face. Pressure is uniformly transmitted to the flexible buffer layer 2 (porous silicone rubber), achieving "flexible force transmission" through pore compression, avoiding stress concentration caused by rigid contact and preventing the wear-resistant layer 3 from cracking; it also has conductive properties to suppress electromagnetic interference. The conductivity of conductive silicone can quickly conduct away static electricity in the construction environment (such as charges generated by equipment friction), avoiding interference of electrostatic discharge to radar circuits. The continuous conductive plane formed by the wear-resistant layer 3 can act as an "electromagnetic shielding layer," attenuating electromagnetic scattering generated by metal components (such as anchor bolts and reinforcing bars) near the working face, and improving the signal-to-noise ratio of the target signal; the wear-resistant conductive silicone is wear-resistant and can be reused for a long time.

[0041] The material properties of the signal transmission layer 1, flexible buffer layer 2, and wear-resistant layer 3 can improve the contact area between the tunnel face and the antenna, thereby reducing electromagnetic wave attenuation, improving data acquisition reliability, and enhancing impact resistance.

[0042] Example 2:

[0043] Based on Example 1, the signal transmission layer 1, flexible buffer layer 2, and wear-resistant layer 3 are integrally molded. Through multi-layer co-extrusion or molding processes, the three layers of materials—contact layer, buffer layer, and support layer—are tightly bonded together to form a complete and inseparable functional composite structure. This avoids interlayer peeling, misalignment, or slippage that may occur in traditional layered structures, significantly improving the structural stability and consistency of the base plate during use. The integral molding enables good interface bonding between the functional layers, reducing the risk of moisture, dust, or other impurities penetrating, avoiding internal corrosion and decreased conductivity caused by environmental factors, and ensuring uniform deformation and good fit of the base plate. This helps improve the signal coupling efficiency between the radar antenna and the ground, ensuring the consistency and repeatability of the signal path during each detection process, thereby improving the accuracy and reliability of the detection data.

[0044] Example 3:

[0045] refer to Figure 3 and Figure 4As shown, based on Example 1, the signal transmission layer 1 is embedded in the flexible buffer layer 2, and the flexible buffer layer 2 is embedded in the wear-resistant layer 3. When a single layer is damaged, it can be replaced separately, reducing maintenance costs. It also has adjustability, allowing the corresponding layer to be replaced according to the actual situation.

[0046] The signal transmission layer 1 has a groove on its outer periphery, and a permanent magnet is embedded in the groove. The flexible buffer layer 2 has a protruding edge 21 on its outer periphery, and a groove is embedded in the protruding edge 21, with a permanent magnet embedded in the groove. The transmission layer is located in the protruding edge 21, and the position of the permanent magnet in the signal transmission layer 1 corresponds to the position of the permanent magnet in the protruding edge 21. The wear-resistant layer 3 has a protective edge 31 on its outer periphery, and a groove is located in the protective edge 31, with a permanent magnet embedded in the groove. The flexible buffer layer 2 is located in the protective edge 31, and the position of the permanent magnet in the protruding edge 21 corresponds to the position of the permanent magnet in the protective edge 31. The permanent magnets can embed the signal transmission layer 1 in the flexible buffer layer 2 and embed the flexible buffer layer 2 in the wear-resistant layer 3, thereby protecting the internal flexible buffer layer 2, signal transmission layer 1, radar antenna, and other radar components through the wear-resistant layer 3.

[0047] The wear-resistant conductive silicone has good adhesion to the flexible buffer layer, which helps to enhance the structural stability of the entire ground-penetrating radar base plate, reduce the gaps between them, and improve the overall reliability and durability of the equipment.

[0048] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model 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 utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A flexible ground-penetrating radar base plate, characterized in that, include: Signal transmission layer (1), which is located at the bottom of the radar antenna; A flexible buffer layer (2) is disposed on the side opposite to the connection between the signal transmission layer (1) and the radar antenna; A wear-resistant layer (3) is disposed on the side opposite to the connection between the flexible buffer layer (2) and the signal transmission layer (1).

2. The flexible ground-penetrating radar base plate according to claim 1, characterized in that: The signal transmission layer (1) is made of carbon fiber rubber.

3. The flexible ground-penetrating radar base plate according to claim 1, characterized in that: The flexible buffer layer (2) is made of porous silicone rubber, and the porosity of the flexible buffer layer (2) is 20%-40%.

4. A flexible ground-penetrating radar base plate according to claim 3, characterized in that: The pore size of the flexible buffer layer (2) is less than 0.5 mm.

5. A flexible ground-penetrating radar base plate according to claim 1, characterized in that: The wear-resistant layer (3) is made of wear-resistant conductive silicone.

6. A flexible ground-penetrating radar base plate according to any one of claims 1-5, characterized in that: The signal transmission layer (1), flexible buffer layer (2) and wear-resistant layer (3) are integrally formed.

7. A flexible ground-penetrating radar base plate according to any one of claims 1-5, characterized in that: The signal transmission layer (1) is embedded in the flexible buffer layer (2), and the flexible buffer layer (2) is embedded in the wear-resistant layer (3).

8. A flexible ground-penetrating radar base plate according to claim 7, characterized in that: The signal transmission layer (1) has a groove on its outer periphery, and a permanent magnet is embedded in the groove. The flexible buffer layer (2) has a protruding edge (21) on its outer periphery, and a groove is provided in the protruding edge (21), and a permanent magnet is embedded in the groove. The transmission layer is located in the protruding edge (21), and the position of the permanent magnet in the signal transmission layer (1) corresponds to the position of the permanent magnet in the protruding edge (21). The wear-resistant layer (3) has a protective edge (31) on its outer periphery, and a groove is provided in the protective edge (31), and a permanent magnet is embedded in the groove. The flexible buffer layer (2) is located in the protective edge (31), and the position of the permanent magnet in the protruding edge (21) corresponds to the position of the permanent magnet in the protective edge (31).

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