CN210376676U - Geological detection radar - Google Patents
Geological detection radar Download PDFInfo
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- CN210376676U CN210376676U CN201921183123.8U CN201921183123U CN210376676U CN 210376676 U CN210376676 U CN 210376676U CN 201921183123 U CN201921183123 U CN 201921183123U CN 210376676 U CN210376676 U CN 210376676U
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- geological detection
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Abstract
The utility model provides a geological detection radar. Wherein the geological detection radar comprises: the frequency reconfigurable antenna module is used for receiving or transmitting signals of each frequency band; the material of the frequency reconfigurable antenna module comprises a graphene material. The utility model discloses a restructural antenna can be along with the difference of environment, selects different mode dynamically to make an antenna realize the function of a plurality of antennas. The utility model discloses can effectively solve electromagnetic interference and the miniaturized problem of system, the adopted frequency reconfigurable antenna based on graphite alkene material, the operating frequency of this antenna has continuously adjustable's characteristic in specific frequency band within range, other radiation characteristic keep unchanged like far field directional diagram and polarization mode.
Description
Technical Field
The utility model relates to a geologic survey technical field, in particular to radar is surveyed to geology.
Background
Geological detection radar is a geophysical exploration instrument. The geological detection radar transmits electromagnetic waves with high frequency and wide frequency bands by using a transmitting antenna, and a receiving antenna receives reflected waves from a medium interface. When the electromagnetic wave propagates in the medium, the electromagnetic wave is reflected when encountering a boundary surface with electrical difference, and the information such as the spatial position, structure, form and buried depth of the medium is estimated according to the characteristics such as the waveform, amplitude intensity and time change of the received electromagnetic wave. The method is widely applied to the fields of geological exploration, nondestructive quality detection of construction engineering, underground pipeline detection and the like.
The prior art has the following disadvantages: 1) selecting antennas with different frequencies according to different requirements of detection objects; 2) the antenna is large in volume, and particularly the low-frequency antenna is large in volume; 3) the test position and the test path cannot be automatically recorded in real time.
SUMMERY OF THE UTILITY MODEL
The utility model provides a geological survey radar for adopt frequency reconfigurable antenna, can select different mode along with the difference of environment through reconfigurable antenna dynamically, thereby make an antenna realize the function of a plurality of antennas. The problems of electromagnetic interference and system miniaturization can be effectively solved.
According to an aspect of the present disclosure, there is provided a geological detection radar, specifically including: the frequency reconfigurable antenna module is used for receiving or transmitting signals of each frequency band; the material of the frequency reconfigurable antenna module comprises a graphene material.
In one possible implementation manner, the frequency reconfigurable antenna module comprises a substrate, a graphene layer arranged on the top of the substrate, a near-elliptic dipole antenna patch and a thin silicon wafer at the bottom of the substrate; wherein the substrate comprises silicon dioxide.
In one possible implementation, the near-elliptic dipole antenna patch has an irregular shape formed by combining a semi-ellipse and a semicircle; the length of the major axis of the semi-ellipse is 90mm, the length of the minor axis of the semi-ellipse is 50mm, and the length of the semi-circle radius is 50 mm.
In a possible implementation manner, the frequency reconfigurable antenna module further includes a reflective cavity for directionally radiating energy for the frequency reconfigurable antenna module.
In one possible implementation, the geological detection radar further comprises: the positioning and attitude determining module comprises an inertial navigation module, a global positioning system and a gyroscope; wherein, the global positioning system is used for providing coordinate position information; the inertial navigation is used for providing equipment running track information; the gyroscope is used for providing attitude information of the geological detection radar, and the attitude information comprises a rotary deviation angle, a pitching angle and a side tilting angle.
In one possible implementation, the geological detection radar further comprises:
the frequency reconfigurable antenna module comprises a receiving antenna and a transmitting antenna;
the geological detection radar also comprises a main control unit, a transmitter and a receiver.
In one possible implementation manner, the method further includes: and the traction module is used for traction the geological detection radar.
According to the geological detection radar disclosed by the embodiment of the disclosure, different working modes can be dynamically selected according to different environments through the reconfigurable antenna, so that one antenna can realize the functions of a plurality of antennas. The antenna can effectively solve the problems of electromagnetic interference and system miniaturization, the adopted frequency reconfigurable antenna based on the graphene material has the characteristic that the working frequency of the antenna is continuously adjustable in a specific frequency band range, and other radiation characteristics such as a far-field directional diagram and a polarization mode are kept unchanged. By adding the variable reactance into the feed system, the bias voltage of the variable reactance is changed, and further the resonance mode of the antenna is changed, so that the frequency reconfiguration of the antenna is realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a block diagram of a geological detection radar module according to an embodiment of the disclosure.
FIG. 2 illustrates a block diagram of a geological detection radar according to an embodiment of the present disclosure.
Fig. 3 shows a schematic diagram of a probing process according to an embodiment of the present disclosure.
Fig. 4 shows a top view of a frequency reconfigurable antenna according to an embodiment of the present disclosure.
Fig. 5 shows a side view of a frequency reconfigurable antenna according to an embodiment of the present disclosure.
Fig. 6 shows a schematic diagram of a frequency reconfigurable antenna and a reflective cavity according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the term "at least one" herein means any one of a plurality or any combination of at least two of a plurality, for example, including at least one of A, B, C, and may mean including any one or more elements selected from the group consisting of A, B and C.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present disclosure.
FIG. 1 shows a block diagram of a geological detection radar module according to an embodiment of the disclosure. As shown in fig. 1, the geological detection radar module includes: the frequency reconfigurable antenna module is used for receiving or transmitting signals of each frequency band; the material of the frequency reconfigurable antenna module comprises a graphene material.
In this implementation, the working principle of the geological detection radar lies in: the electromagnetic wave generated by the radar transmitter is transmitted to the antenna after passing through the receiving and transmitting switch, and then the electromagnetic wave is directionally radiated in the medium by the antenna; electromagnetic waves propagate in a medium, and the electromagnetic waves are influenced by the characteristics of a target medium to be reflected and scattered and simultaneously the characteristics of the electromagnetic waves are changed; the partially scattered and reflected electromagnetic waves are received by the receiving antenna and are fed to the receiver through the transmission line and the transceiving switch; the receiver amplifies the signal and processes the signal to obtain the required information, and the result is sent to the terminal for display.
In this implementation, the geological detection radar is a specialized radar system proposed for geophysical detection, and is composed of a transmitting part, a receiving part, and a control system. Wherein the transmitting part is composed of a transmitter generating a high frequency pulse wave and an antenna (Tx) radiating an electromagnetic wave to the outside. Electromagnetic waves are transmitted to the underground through the transmitting antenna, and the electromagnetic waves encounter an electrical interface to generate reflection in the process of propagation. The reflected wave is received by a receiving antenna (Rx) arranged at a certain position, and at the same time, the receiving antenna also receives a direct wave propagating along the surface layer of the rock stratum, and the reflected wave and the direct wave are recorded by a receiver at the same time or displayed at a terminal.
According to the geological detection radar disclosed by the embodiment of the disclosure, different working modes can be dynamically selected according to different environments through the reconfigurable antenna, so that one antenna can realize the functions of a plurality of antennas. The antenna can effectively solve the problems of electromagnetic interference and system miniaturization, the adopted frequency reconfigurable antenna based on the graphene material has the characteristic that the working frequency of the antenna is continuously adjustable in a specific frequency band range, and other radiation characteristics such as a far-field directional diagram and a polarization mode are kept unchanged. By adding the variable reactance into the feed system, the bias voltage of the variable reactance is changed, the resonance mode of the antenna is further changed, the frequency reconfiguration of the antenna is realized, the convenience of outgoing operation is improved, the cost for purchasing a plurality of antennas is saved, meanwhile, the continuous adjustment of the frequency of the antenna is realized, the frequency can be dynamically selected according to the characteristics of a detected medium, and the accuracy of a detection result is improved.
In this implementation, as shown in fig. 1, the geological detection radar further includes: the frequency reconfigurable antenna module includes a receiving antenna 110 and a transmitting antenna 120; the geological detection radar also comprises a master control unit 130, a transmitter 140 and a receiver 150.
In one possible implementation manner, the frequency reconfigurable antenna module comprises a substrate, a graphene layer arranged on the top of the substrate, a near-elliptic dipole antenna patch and a thin silicon wafer at the bottom of the substrate; wherein the substrate comprises silicon dioxide.
In one possible implementation, the near-elliptic dipole antenna patch has an irregular shape formed by combining a semi-ellipse and a semicircle; the length of the major axis of the semi-ellipse is 90mm, the length of the minor axis of the semi-ellipse is 50mm, and the length of the semi-circle radius is 50 mm.
In a possible implementation manner, the frequency reconfigurable antenna module further includes a reflective cavity for directionally radiating energy for the frequency reconfigurable antenna module.
In one possible implementation, the geological detection radar further comprises: the positioning and attitude determining module comprises an inertial navigation module, a global positioning system and a gyroscope; wherein, the global positioning system is used for providing coordinate position information; the inertial navigation is used for providing equipment running track information; the gyroscope is used for providing attitude information of the geological detection radar, and the attitude information comprises a rotary deviation angle, a pitching angle and a side tilting angle.
In the implementation mode, the geological detection radar system is coupled with the positioning and attitude determination module, and the radar test position and test path information are automatically recorded in real time. Coordinate position and path information can be recorded in an open area with good GPS signals; when the GPS signal is shielded (such as in a tunnel), a DR + gyroscope can be adopted to record a detection path in a temporary relative coordinate system.
In one possible implementation manner, the method further includes: and the traction module is used for traction the geological detection radar.
FIG. 2 illustrates a block diagram of a geological detection radar according to an embodiment of the present disclosure. As shown in fig. 2, the bottom of the geological detection radar is formed by fixedly connecting a transmitting antenna 120 and a reflection cavity, and a receiving antenna 110 and a reflection cavity in parallel. The top of the top plate of the reflection cavity of the transmitting antenna is provided with a transmitter 140 and a positioning and attitude-determining module 160, the top of the top plate of the reflection cavity of the receiving antenna is provided with a receiver, a power supply device and other auxiliary devices, the rear part of the detection structure is connected with a distance measuring wheel, and the front part of the detection structure is connected with a traction device. The length L of the detection structure is 340mm, the width W of the detection structure is 300mm, and the detection structure is connected with the main control unit through an optical fiber. The main control unit is a high-performance tablet personal computer provided with special control software, and can realize the control of the geological detection radar and the display processing of detection data. The positioning and attitude determination module consists of DR (inertial navigation), GPS (global positioning system), gyroscope and a calculation system. The GPS can provide coordinate position information in an open field with GPS information; the DR can provide equipment operation track information under any environment; the gyroscope may provide attitude information (yaw, pitch, roll) of the device. The module can acquire the position information of the equipment in real time. The distance measuring wheel is used for collecting the running distance information of the detection structure and correcting the position information of the positioning and attitude determining module.
In the embodiment, the geological detection radar is coupled with the positioning and attitude determination module, so that the radar testing position and the testing path information can be automatically recorded in real time.
FIG. 3 shows a schematic diagram of a detection process according to an embodiment of the present disclosure, as shown in FIG. 3, geological detection radar moves the device from position 1 proximate to the surface in a direction to position 2, keeping the receiver forward in the direction of travel. And (3) observing by adopting a profile method, namely moving the transmitting antenna and the receiving antenna along the measured profile sequentially at the same antenna interval and a certain measuring step distance and acquiring data so as to obtain radar information records on the whole profile.
Fig. 4 shows a top view of a frequency reconfigurable antenna according to an embodiment of the present disclosure, and fig. 5 shows a side view of a frequency reconfigurable antenna according to an embodiment of the present disclosure. As shown in fig. 4 and 5, the antenna unit has a structure as shown in fig. 4 and 5, and is composed of a silicon dioxide substrate, a graphene layer and a near-elliptic dipole antenna patch disposed on the substrate, and a thin silicon wafer under the substrate. The antenna element is formed by combining a semi-ellipse and a semi-circle, the major axis of the ellipse is determined to be 90mm through optimization, the minor axis of the ellipse is determined to be 50mm, the radius of the semi-circle is determined to be b, and the distance between central feeding points is 3 mm. The substrate has a length L of 320mm and a width W of 140 mm. By changing the bias voltage applied between the graphene and the silicon wafer, the chemical potential of the graphene can be regulated, so that the surface impedance of the graphene is adjusted, the performance of the near-elliptic dipole antenna arranged on the graphene is changed, and continuous frequency adjustment can be realized.
Fig. 6 shows a schematic diagram of a frequency reconfigurable antenna and a reflective cavity according to an embodiment of the present disclosure. As shown in fig. 6, in order to obtain better detection effect, the frequency reconfigurable antenna is made to have a downward maximum radiation direction. A reflection cavity is arranged above the antenna, so that the antenna mainly radiates energy downwards to achieve the directional effect. The middle layer movable plate of the reflection cavity is made of metal materials and can move up and down, and the moving target height is selected according to 1/4 of the wavelength corresponding to the set working center frequency of the antenna.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (7)
1. A geological detection radar, comprising:
the frequency reconfigurable antenna module is used for receiving or transmitting signals of each frequency band;
the material of the frequency reconfigurable antenna module comprises a graphene material.
2. The geological detection radar of claim 1, wherein:
the frequency reconfigurable antenna module comprises a substrate, a graphene layer arranged on the top of the substrate, a near-elliptic dipole antenna patch and a thin silicon wafer at the bottom of the substrate;
wherein the substrate comprises silicon dioxide.
3. Geological detection radar according to claim 2,
the near-elliptic dipole antenna patch is irregular and formed by combining a semi-ellipse and a semicircle;
the length of the major axis of the semi-ellipse is 90mm, the length of the minor axis of the semi-ellipse is 50mm, and the length of the semi-circle radius is 50 mm.
4. Geological detection radar according to claim 1,
the frequency reconfigurable antenna module further comprises a reflective cavity for directionally radiating energy for the frequency reconfigurable antenna module.
5. The geological detection radar of claim 1 further comprising:
the positioning and attitude determining module comprises an inertial navigation module, a global positioning system and a gyroscope;
wherein, the global positioning system is used for providing coordinate position information;
the inertial navigation is used for providing equipment running track information;
the gyroscope is used for providing attitude information of the geological detection radar, and the attitude information comprises a rotary deviation angle, a pitching angle and a side tilting angle.
6. The geological detection radar of claim 1 further comprising:
the frequency reconfigurable antenna module comprises a receiving antenna and a transmitting antenna;
the geological detection radar also comprises a main control unit, a transmitter and a receiver.
7. The geological detection radar of claim 1 further comprising:
and the traction module is used for traction the geological detection radar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921183123.8U CN210376676U (en) | 2019-07-25 | 2019-07-25 | Geological detection radar |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921183123.8U CN210376676U (en) | 2019-07-25 | 2019-07-25 | Geological detection radar |
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| CN210376676U true CN210376676U (en) | 2020-04-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110275162A (en) * | 2019-07-25 | 2019-09-24 | 北京市市政工程研究院 | Earth-probing radar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110275162A (en) * | 2019-07-25 | 2019-09-24 | 北京市市政工程研究院 | Earth-probing radar |
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