Directional drilling radar equipment and detection method thereof

Abstract

The invention relates to the field of radar systems, in particular to directional drilling radar equipment, which comprises a transmitting unit provided with an angle-adjustable array antenna and capable of transmitting radar waves in any direction to realize directional coverage of a target area; the receiving unit adopts a multi-angle receiving array antenna and is combined with a signal filtering technology, so that the receiving sensitivity and accuracy of weak signals can be effectively improved; the positioning unit is provided with a high-precision inertial navigation system and a depth sensor, and accurate positioning and posture correction of equipment in a drill hole are ensured; the transmitting unit supports a high-frequency working mode and a low-frequency working mode which are respectively used for shallow high-resolution imaging and deep high-penetration detection. The invention provides directional drilling radar equipment and a detection method thereof, which are used for solving the defects of control host performance and directional drilling radar technology in the aspect of imaging technology in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of radar systems, and in particular to a directional drilling radar device and a detection method thereof. Background Art

[0002] Existing borehole radar equipment is usually limited to a single-directional detection mode, making it difficult to achieve all-round, high-precision detection of complex underground structures (such as faults, fissures, and groundwater). In some special scenarios (such as tunnel excavation, underground resource detection, or geological disaster assessment), more flexible directional detection capabilities are required to accurately analyze the geological characteristics of the target area.

[0003] In addition, a control host is required in directional drilling radar equipment, but long-distance cable transmission will cause signal attenuation and reduce the signal-to-noise ratio, and the average power and equivalent bandwidth of the control host based on the time domain pulse system are low, which limits the detection effect and affects the deployment and use of this equipment. In addition, the three-dimensional imaging technology of directional drilling radar is not yet mature. The existing technology is mainly based on ground-penetrating radar and air-to-air radar, which have limitations in the application of directional drilling radar.

[0004] Therefore, designing a borehole radar device with high-precision directional function can break through the limitations of traditional technology and improve the efficiency and imaging quality of underground detection. Summary of the invention

[0005] In view of the above background technology, the present invention provides a directional drilling radar device and a detection method thereof, which are used to solve the deficiencies in the prior art in the performance of the control host and the imaging technology of the directional drilling radar technology.

[0006] The present application discloses a directional drilling radar device, comprising:

[0007] Transmitter unit: equipped with an array antenna with adjustable angle, capable of transmitting radar waves in any direction to achieve directional coverage of the target area;

[0008] Receiving unit: Adopting multi-angle receiving array antenna and combining signal filtering technology, it can effectively improve the receiving sensitivity and accuracy of weak signals;

[0009] Positioning unit: equipped with a high-precision inertial navigation system (IMU) and depth sensor to ensure accurate positioning and attitude correction of the equipment in the borehole;

[0010] FM modulation unit: The transmitting unit supports high-frequency and low-frequency working modes, which are used for shallow-layer high-resolution imaging and deep-layer high-penetration detection respectively.

[0011] Preferably, it also includes a data processing and imaging module for real-time processing of radar signals and three-dimensional modeling of underground structures.

[0012] Preferably: it also includes an automatic angle adjustment mechanism, and the transmitting and receiving antennas are driven by servo motors and can be horizontally rotated from 0° to 360° to achieve multi-angle full coverage detection.

[0013] Preferably: the transmitting unit includes an adjustable array antenna and a transmitting control module, the adjustable array antenna is used to realize omni-directional angle transmission, the antenna frequency band supports multi-frequency switching, the frequency range is 10MHz to 3GHz, and it can adapt to the needs of different detection depths, and the transmitting control module is used to accurately adjust the emission intensity and direction of the radar wave, and supports switching between directional mode and full coverage mode.

[0014] Preferably: the receiving unit includes a multi-channel receiving antenna and a signal processing module. The multi-channel receiving antenna is equipped with a distributed array antenna, which can simultaneously receive multi-directional reflection signals to improve data acquisition efficiency and accuracy; the signal processing module uses real-time filtering, time domain inversion and wave velocity analysis technology to extract the characteristic parameters of the underground reflection layer.

[0015] Preferably, the present application also discloses a detection method based on a directional drilling radar device, comprising the following steps:

[0016] Step S1, deploying equipment: placing the borehole radar equipment into the borehole, and determining the depth and posture of the equipment through the positioning module.

[0017] Step S2, directional detection: according to the preset detection direction, the direction of the transmitting antenna is controlled by the automatic angle adjustment mechanism to complete multi-angle detection in steps.

[0018] Step S3, signal acquisition and processing: The receiving unit synchronously receives the radar wave reflection signal, and performs denoising, gain compensation and feature extraction in combination with a multi-band processing algorithm.

[0019] Step S4, 3D imaging and visualization: Based on the collected multi-angle data, a voxel reconstruction algorithm is used to generate an underground 3D model, and the model is displayed in real time on a visualization platform.

[0020] Step S5, feedback optimization: Analyze the detection results and readjust the detection angle or frequency band as needed to ensure that there are no blind spots in the detection area.

[0021] Technical effects and advantages of the present invention:

[0022] 1. Precise directional capability: The combination of the positioning unit and the transmitting and receiving antennas with adjustable angles enables precise coverage of radar waves in different directions and depths.

[0023] 2. Efficient detection: Multi-angle detection and multi-channel data acquisition system significantly improve detection efficiency and data quality.

[0024] 3. High-resolution imaging: Using multi-band working mode and advanced three-dimensional imaging algorithm to make underground structure information clearer.

[0025] 4. Strong adaptability: The equipment can adapt to complex geological environments and is suitable for various scenarios such as mineral exploration, tunnel construction, and groundwater detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the principle of a directional drilling radar device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0028] Example 1

[0029] See also Figure 1 In this embodiment, a directional drilling radar device is provided, including:

[0030] Transmitter unit: equipped with an array antenna with adjustable angle, capable of transmitting radar waves in any direction to achieve directional coverage of the target area;

[0031] The transmitting unit includes an adjustable array antenna and a transmitting control module. The adjustable array antenna is used to realize omni-directional transmission. The antenna frequency band supports multi-frequency switching. The frequency range is 10MHz to 3GHz to meet the needs of different detection depths. The transmitting control module is used to accurately adjust the transmission intensity and direction of the radar wave, and supports switching between directional mode and full coverage mode.

[0032] Receiving unit: Adopting multi-angle receiving array antenna and combining signal filtering technology, it can effectively improve the receiving sensitivity and accuracy of weak signals;

[0033] The receiving unit includes a multi-channel receiving antenna and a signal processing module. The multi-channel receiving antenna is equipped with a distributed array antenna, which can simultaneously receive multi-directional reflection signals to improve data acquisition efficiency and accuracy; the signal processing module uses real-time filtering, time domain inversion and wave velocity analysis technology to extract the characteristic parameters of the underground reflection layer.

[0034] Positioning unit: equipped with a high-precision inertial navigation system (IMU) and depth sensor to ensure accurate positioning and attitude correction of the equipment in the borehole;

[0035] Among them, the IMU (Inertial Measurement Unit) is used to obtain the attitude angle and depth position of the equipment in the borehole in real time. The depth sensor is used to accurately measure the longitudinal depth of the equipment in the borehole and assist in the spatial correction of the data.

[0036] FM modulation unit: The transmitting unit supports high-frequency and low-frequency working modes, which are used for shallow-layer high-resolution imaging and deep-layer high-penetration detection respectively.

[0037] Preferably, it also includes a data processing and imaging module for real-time processing of radar signals and three-dimensional modeling of underground structures.

[0038] The data processing and imaging module specifically includes the following components:

[0039] 1. Real-time data processing: Use the reflection wave time difference analysis method to calculate the formation depth and dielectric constant.

[0040] 2. 3D modeling: Generate 3D images of underground structures through inversion algorithms, providing accurate geological information.

[0041] 3. Visualization platform: supports real-time 3D imaging, depth profile and fracture analysis diagram display.

[0042] Preferably: it also includes an automatic angle adjustment mechanism, and the transmitting and receiving antennas are driven by servo motors and can be horizontally rotated from 0° to 360° to achieve multi-angle full coverage detection.

[0043] Example 2

[0044] The present application also discloses a detection method based on a directional drilling radar device, comprising the following steps:

[0045] Step S1, deploying equipment: placing the borehole radar equipment into the borehole, and determining the depth and posture of the equipment through the positioning module.

[0046] Step S2, directional detection: according to the preset detection direction, the direction of the transmitting antenna is controlled by the automatic angle adjustment mechanism, and multi-angle detection is completed step by step; the receiving antenna is adjusted synchronously, the reflected signal is collected and the echo data in each direction is recorded

[0047] Step S3, signal acquisition and processing: The receiving unit synchronously receives the radar wave reflection signal, and performs denoising, gain compensation and feature extraction in combination with a multi-band processing algorithm. The geological characteristic parameters (such as dielectric constant and wave velocity) of the target area are extracted using a time domain inversion algorithm.

[0048] Step S4, 3D imaging and visualization: Based on the collected multi-angle data, a voxel reconstruction algorithm is used to generate an underground 3D model, and the model is displayed in real time on a visualization platform. The visualization platform is used to perform in-depth analysis on the model to identify the structural features of the target area.

[0049] Step S5, feedback optimization: Analyze the detection results and readjust the detection angle or frequency band as needed to ensure that there are no blind spots in the detection area. Further optimize the detection coverage by adjusting the direction and frequency of the transmitting antenna.

[0050] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A directional drilling radar device, characterized in that: include: Transmitter unit: equipped with an array antenna with adjustable angle, capable of transmitting radar waves in any direction to achieve directional coverage of the target area; Receiving unit: uses a multi-angle receiving array antenna combined with signal filtering technology to improve the reception sensitivity and accuracy of weak signals; Positioning unit: equipped with a high-precision inertial navigation system and depth sensor for precise positioning and attitude correction in the borehole; FM modulation unit: The transmitting unit supports high-frequency and low-frequency working modes, which are used for shallow-layer high-resolution imaging and deep-layer high-penetration detection respectively.

2. A directional drilling radar device according to claim 1, characterized in that: It also includes a data processing and imaging module for real-time processing of radar signals and three-dimensional modeling of underground structures.

3. A directional drilling radar device according to claim 2, characterized in that: The transmitting unit includes an adjustable array antenna and a transmitting control module. The adjustable array antenna is used to realize omni-directional transmission. The antenna frequency band supports multi-frequency switching. The frequency range is 10MHz to 3GHz to meet the needs of different detection depths. The transmitting control module is used to accurately adjust the transmission intensity and direction of the radar wave, and supports switching between directional mode and full coverage mode.

4. A directional drilling radar device according to claim 3, characterized in that: The receiving unit includes a multi-channel receiving antenna and a signal processing module. The multi-channel receiving antenna is equipped with a distributed array antenna, which can simultaneously receive multi-directional reflection signals to improve data acquisition efficiency and accuracy; the signal processing module uses real-time filtering, time domain inversion and wave velocity analysis technology to extract the characteristic parameters of the underground reflection layer.

5. A directional drilling radar device according to claim 4, characterized in that: It also includes an automatic angle adjustment mechanism. The adjustable array antenna and multi-channel receiving antenna are driven by a servo motor and can rotate horizontally from 0° to 360° to achieve multi-angle full coverage detection.

6. A detection method for directional drilling radar equipment according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step S1, deploying equipment: placing the borehole radar equipment into the borehole, and determining the depth and posture of the equipment through the positioning module; Step S2, directional detection: according to the preset detection direction, the direction of the transmitting antenna is controlled by the automatic angle adjustment mechanism to complete multi-angle detection in steps; Step S3, signal acquisition and processing: the receiving unit synchronously receives the radar wave reflection signal, and performs denoising, gain compensation and feature extraction in combination with a multi-band processing algorithm; Step S4, 3D imaging and visualization: based on the collected multi-angle data, a voxel reconstruction algorithm is used to generate an underground 3D model, and the model is displayed in real time on a visualization platform; Step S5, feedback optimization: Analyze the detection results and readjust the detection angle or frequency band as needed to ensure that there are no blind spots in the detection area.

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