Antenna module for borehole multi-frequency radar

Abstract

The present invention provides an antenna module for a borehole multi-frequency radar, comprising a transmitting chamber, a receiving chamber, and a transceiver chamber connecting block. The transmitting chamber consists of a transmitter, a butterfly-shaped radiating surface, a shielding shell, an impedance-matching resistor, and a filler block, and is used to receive electromagnetic wave signals of a fixed frequency. The receiving chamber consists of a receiver, a butterfly-shaped radiating surface, a shielding shell, an impedance-matching resistor, and a filler block, and is used to receive electromagnetic wave signals of a fixed frequency. The transmitting chamber and the receiving chamber are interconnected via the transceiver chamber connecting block to form a fixed-frequency antenna module. The antenna module provided by the present invention integrates the antenna radiating surface with the transmitter (receiver), enabling modular design of transceiver antennas. In conjunction with a multi-channel radar signal acquisition and control card, it is possible to select, add, or delete transceiver antennas of target frequencies as needed during detection. This antenna module design can significantly shorten the time required to develop or assemble borehole multi-frequency radar equipment, improving the convenience and practicality of the equipment.

Description

Technical Field

[0001] The present invention relates to the field of borehole radar, and in particular to an antenna module of a borehole multi-frequency radar. Background Art

[0002] Borehole radar is a specialized type of ground-penetrating radar, typically placed inside an existing borehole to detect geological information surrounding the borehole. It emits electromagnetic waves into the strata surrounding the borehole, leveraging the propagation characteristics of these waves to obtain information about the strata and thereby interpret the subsurface structure. Compared to ground-based radar, borehole radar has a greater detection range and is therefore commonly used in areas such as underground oil and gas exploration and advanced coal mining exploration.

[0003] In recent years, as the demand for borehole radar detection accuracy continues to increase across various detection fields, conventional borehole radars equipped with single-frequency transceiver antennas have gradually fallen behind the demands for high-precision deep-earth exploration due to their inability to balance detection range and resolution (specifically, low-frequency antennas offer long detection range but low resolution, while high-frequency antennas offer high resolution but limited detection range). Research has shown that multi-frequency data fusion schemes, leveraging the range and accuracy advantages of signals from different frequencies, can effectively improve radar data imaging quality and image interpretation accuracy. Therefore, fusion detection using a combination of low- and high-frequency antennas is a key development direction for borehole radar.

[0004] The multi-frequency fusion detection solution allows borehole radar to achieve both detection range and resolution. In its implementation, modularizing transceiver antennas with different center frequencies can significantly shorten the development and assembly time of multi-frequency borehole radar equipment, improving its convenience and practicality. Therefore, this invention proposes an antenna module for a multi-frequency borehole radar. This module integrates transceiver antennas with different center frequencies into modular units, allowing the selection, addition, or removal of antennas with target frequencies as needed during detection, thereby saving costs and improving detection efficiency. Summary of the Invention

[0005] Based on the above technical background, the present invention provides an antenna module for a borehole multi-frequency radar, comprising a transmitting compartment, a receiving compartment and a transmitting and receiving compartment connecting block;

[0006] The transmitting chamber consists of a transmitter, a butterfly-shaped radiating surface, a shielding shell, an impedance matching resistor and a filling block; wherein the transmitter is located in the middle of the transmitting chamber, connected to the butterfly-shaped radiating surface, and is used to transmit electromagnetic wave signals of a fixed frequency; the shielding shell is used to shield the signal transmission from the back of the butterfly-shaped radiating surface to ensure the directionality of the transmitted electromagnetic waves; the two ends of the impedance matching resistor are respectively welded to the butterfly-shaped radiating surface and the shielding shell; the filling block is placed inside the shielding shell to support the butterfly-shaped radiating surface;

[0007] The receiving chamber has a similar structure to the transmitting chamber, consisting of a receiver, a butterfly-shaped radiating surface, a shielding shell, an impedance matching resistor, and a filler block. The receiver is located in the middle of the receiving chamber and connected to the butterfly-shaped radiating surface to receive the electromagnetic wave signal of the fixed frequency. The shielding shell is used to shield the signal reception on the back of the butterfly-shaped radiating surface to ensure directional reception of the electromagnetic wave.

[0008] The transmitting compartment and the receiving compartment are connected to each other through the transmitting and receiving compartment connecting block to form an antenna module with a fixed frequency.

[0009] Furthermore, a module connection block is provided at the end of the receiving compartment, and the antenna modules of different frequencies are connected to each other through the module connection block and can be combined to form a multi-frequency radar antenna.

[0010] Furthermore, the antenna module also includes a multi-channel radar signal acquisition and control card, which is placed inside the borehole radar and is used to control the electromagnetic wave signal emission of the antenna module and to collect the reflected electromagnetic waves received by the antenna module; multiple antenna modules of different frequencies can be simultaneously connected to different channels of the multi-channel radar signal acquisition and control card to realize the selection, increase or decrease of the transceiver antenna of the target frequency as needed during detection.

[0011] Furthermore, the receiving and dispatching compartment connection block and the module connection block are both made of non-metallic materials.

[0012] Furthermore, a groove structure is provided at the bottom of the shielding shell for accommodating the wires; a protruding structure is provided in the middle of the shielding shell for fixing the transmitter or the receiver; a circular hole is provided at the bottom of the middle section of the shielding shell, and the wire passes through the circular hole and is connected to the transmitter or the receiver located in the middle of the shielding shell.

[0013] Compared with the prior art, the present invention has achieved the following technical effects:

[0014] ① Unlike the prior art solution where the antenna radiating surface and the transmitter (receiver) are placed separately, the antenna module for a borehole multi-frequency radar provided by the present invention integrates the antenna radiating surface and the transmitter (receiver) into one, thus enabling modular design of the transceiver antenna.

[0015] ② This invention integrates transceiver antennas for different frequencies into separate modules. Combined with a multi-channel radar signal acquisition and control card, this allows for the selection, addition, or removal of antennas for target frequencies as needed during detection. This antenna module design significantly reduces the development and assembly time of borehole multi-frequency radar equipment, improving its convenience and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of the overall structure of an antenna module provided in an embodiment of the present invention;

[0018] Figure 2 An exploded view of a launch chamber provided in an embodiment of the present invention;

[0019] Figure 3 An exploded view of a receiving bin provided in an embodiment of the present invention;

[0020] Figure 4 The 600 MHz single-frequency borehole radar provided in an embodiment of the present invention;

[0021] Figure 5 The 600MHz+900MHz dual-frequency borehole radar provided in the embodiment of the present invention;

[0022] Figure 6 The 600MHz+900MHz+1.2GHz borehole multi-frequency radar provided in the embodiment of the present invention;

[0023] Figure 7 This is an axonometric view of the shielding shell provided in an embodiment of the present invention.

[0024] The reference numerals are as follows:

[0025] 1-transmitting compartment; 2-receiving compartment; 3-transmitting and receiving compartment connection block; 4-module connection block; 5-multi-channel radar signal acquisition and control card; 11-transmitter; 12-butterfly-shaped radiation surface; 13-shielding shell; 14-impedance matching resistor; 15-filling block; 131-groove structure; 132-protrusion structure; 133-circular hole. DETAILED DESCRIPTION

[0026] like Figure 1 As shown, this embodiment provides an antenna module for a borehole multi-frequency radar, including a transmitting compartment 1, a receiving compartment 2 and a transmitting and receiving compartment connecting block 3.

[0027] like Figure 2As shown, in this embodiment, the transmitting chamber 1 consists of a transmitter 11, a butterfly-shaped radiating surface 12, a shielding shell 13, an impedance matching resistor 14 and a filling block 15; wherein, the transmitter 11 is fixed in the middle of the transmitting chamber 1, connected to the butterfly-shaped radiating surface 12, and is used to transmit electromagnetic wave signals of a fixed frequency; the number of butterfly-shaped radiating surfaces 12 connected to the transmitter 11 is 2, which are symmetrically distributed on both sides of the transmitter 11; the shielding shell 13 is used to shield the signal transmission on the back of the butterfly-shaped radiating surface 12 on the one hand to ensure the directionality of the transmitted electromagnetic waves, and on the other hand to accommodate and protect the transmitter 11, the butterfly-shaped radiating surface 12 and the filling block 15; the two ends of the impedance matching resistor 14 are respectively welded to the butterfly-shaped radiating surface 12 and the shielding shell 13, and two impedance matching resistors are provided on each butterfly-shaped radiating surface 12; the filling block 15 is placed inside the shielding shell 13 to support the butterfly-shaped radiating surface 12, and the filling block 15 is made of polystyrene foam to reduce weight.

[0028] like Figure 3 As shown, in this embodiment, the structure of the receiving chamber 2 is similar to that of the transmitting chamber 1, and is composed of a receiver 21, a butterfly-shaped radiating surface 12, a shielding shell 13, an impedance matching resistor 14 and a filling block 15; wherein, the receiver 21 is also located in the middle of the receiving chamber 2, connected to the butterfly-shaped radiating surface 12, and is used to receive electromagnetic wave signals of a fixed frequency; the number of butterfly-shaped radiating surfaces 12 connected to the receiver 21 is also 2, which are symmetrically distributed on both sides of the receiver 21; the shielding shell 13 in the receiving chamber 2 is used, on the one hand, to shield the signal reception on the back of the butterfly-shaped radiating surface 12 to ensure directional reception of electromagnetic waves, and on the other hand, to accommodate the receiver 21, the butterfly-shaped radiating surface 12 and the filling block 15.

[0029] In this embodiment, the transmitting chamber 1 and the receiving chamber 2 are connected to each other through the transmitting and receiving chamber connecting block 3 to form a fixed frequency antenna module; the transmitting chamber connecting block 3 can be quickly fixed to the transmitting chamber 1 and the receiving chamber 2 by screws, which facilitates the assembly of the antenna module.

[0030] In this embodiment, a module connection block 4 is provided at the end of the receiving compartment 2. Antenna modules of different frequencies are interconnected via the module connection block 4 to form a multi-frequency radar antenna. The module connection block 4 can be quickly connected to different antenna modules using screws, facilitating quick connection between different antenna modules.

[0031] like Figure 1 As shown, the antenna module of a borehole multi-frequency radar provided in this embodiment also includes a multi-channel radar signal acquisition and control card 5. The multi-channel radar signal acquisition and control card 5 is placed inside the borehole radar and is used to control the electromagnetic wave signal emission of the antenna module and to collect the reflected electromagnetic waves received by the antenna module; multiple antenna modules of different frequencies can be simultaneously connected to different channels of the multi-channel radar signal acquisition and control card 5 to realize the selection, increase or decrease of the transceiver antenna of the target frequency as needed during detection.

[0032] It should be noted that by selecting the antenna module corresponding to the center frequency according to the needs, and cooperating with the multi-channel radar signal acquisition and control card 5, a single / multi-frequency radar that meets the needs can be obtained. Figure 4 As shown, an antenna module with a main frequency of 600 MHz is selected and placed inside the borehole radar, and connected to one of the channels in the multi-channel radar signal acquisition and control card 5, so as to obtain a 600 MHz borehole single-frequency radar; Figure 5 As shown, two antenna modules with main frequencies of 600MHz and 900MHz are selected, and the two are connected by a module connecting block 4 and placed inside the borehole radar. Then, the two antenna modules are connected to two channels in the multi-channel radar signal acquisition and control card 5, and a 600MHz+900MHz borehole dual-frequency radar is obtained; Figure 6 As shown, three antenna modules with main frequencies of 600 MHz, 900 MHz and 1.2 GHz are selected, connected by a module connection block 4 and placed inside the borehole radar, and then the three antenna modules are connected to three channels in the multi-channel radar signal acquisition and control card 5 to obtain a 600 MHz + 900 MHz + 1.2 GHz borehole multi-frequency radar.

[0033] In this embodiment, the transceiver compartment connection block 3 and the module connection block 4 are both made of non-metallic materials to avoid interference with the signal.

[0034] like Figure 7 As shown, in this embodiment, a groove structure 131 is provided at the bottom of the shielding shell 13 for accommodating the wire; a protrusion structure 132 is provided in the middle of the shielding shell 3 for fixing the transmitter 11 or the receiver 21; a circular hole 133 is provided at the bottom of the middle section of the shielding shell 3, and the wire passes through the circular hole 133 and is connected to the transmitter 11 or the receiver 21 located in the middle of the shielding shell.

[0035] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not depart from the present invention should be included in the patent scope of this case.

Claims

1. An antenna module for a borehole multi-frequency radar, characterized in that: It comprises a transmitting compartment (1), a receiving compartment (2) and a transmitting and receiving compartment connecting block (3); The transmitting chamber (1) is composed of a transmitter (11), a butterfly-shaped radiating surface (12), a shielding shell (13), an impedance matching resistor (14) and a filling block (15); wherein the transmitter (11) is located in the middle of the transmitting chamber (1), connected to the butterfly-shaped radiating surface (12), and is used to transmit electromagnetic wave signals of a fixed frequency; the shielding shell (13) is used to shield the signal transmission on the back side of the butterfly-shaped radiating surface (12) to ensure the directionality of the transmitted electromagnetic waves; the two ends of the impedance matching resistor (14) are respectively welded to the butterfly-shaped radiating surface (12) and the shielding shell (13); the filling block (15) is placed inside the shielding shell (13) and is used to support the butterfly-shaped radiating surface (12); The structure of the receiving chamber (2) is similar to that of the transmitting chamber (1), and is composed of a receiver (21), a butterfly-shaped radiating surface (12), a shielding shell (13), an impedance matching resistor (14), and a filling block (15); wherein the receiver (21) is located in the middle of the receiving chamber (2), connected to the butterfly-shaped radiating surface (12), and is used to receive the electromagnetic wave signal of the fixed frequency; the shielding shell (13) is used to shield the signal reception on the back side of the butterfly-shaped radiating surface (12) to ensure directional reception of electromagnetic waves; The transmitting chamber (1) and the receiving chamber (2) are connected to each other via the transmitting and receiving chamber connecting block (3) to form a fixed frequency antenna module; The number of butterfly-shaped radiating surfaces (12) connected to the transmitter (11) is two, and they are symmetrically distributed on both sides of the transmitter (11); The bottom of the shielding shell (13) is provided with a groove structure (131) for accommodating a wire; the middle of the shielding shell (13) is provided with a protruding structure (132) for fixing the transmitter (11) or the receiver (21); the bottom of the middle section of the shielding shell (13) is provided with a circular hole (133), and the wire passes through the circular hole (133) and is connected to the transmitter (11) or the receiver (21) located in the middle of the shielding shell.

2. The antenna module of a borehole multi-frequency radar according to claim 1, characterized in that: A module connection block (4) is provided at the end of the receiving compartment (2), and antenna modules of different frequencies are connected to each other via the module connection block (4) and can be combined to form a multi-frequency radar antenna.

3. The antenna module of a borehole multi-frequency radar according to claim 1, characterized in that: The invention also includes a multi-channel radar signal acquisition and control card (5), which is placed inside the borehole radar and is used to control the emission of electromagnetic wave signals of the antenna module and to collect reflected electromagnetic waves received by the antenna module; multiple antenna modules of different frequencies can be connected to different channels of the multi-channel radar signal acquisition and control card (5) at the same time, so as to realize the selection, increase or decrease of the receiving and transmitting antenna of the target frequency as needed during detection.

4. The antenna module of a borehole multi-frequency radar according to claim 2, characterized in that: The receiving and dispatching compartment connection block (3) and the module connection block (4) are both made of non-metallic materials.

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