CN115276696B - Orientation apparatus and method for through-the-earth communication - Google Patents
Orientation apparatus and method for through-the-earth communication Download PDFInfo
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- CN115276696B CN115276696B CN202210835696.4A CN202210835696A CN115276696B CN 115276696 B CN115276696 B CN 115276696B CN 202210835696 A CN202210835696 A CN 202210835696A CN 115276696 B CN115276696 B CN 115276696B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
- H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/025—Services making use of location information using location based information parameters
- H04W4/026—Services making use of location information using location based information parameters using orientation information, e.g. compass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The invention provides a directional device and a method for through-the-earth communication, wherein the device comprises: the directional range setting module is used for setting the directional range of signal transmission; the ground penetrating communication device setting module is used for setting one or more pairs of buried electrodes into a transmitting and receiving electrode pair which is used for receiving a plurality of ground penetrating communication signals; the mechanical control module is used for adjusting the position of the transceiving electrode pair within the orientation range; and the received signal processing module is used for measuring a plurality of received signals, determining a plurality of received signal strength values and obtaining the target positions of the corresponding transceiving electrode pairs based on the plurality of received signal strength values. The invention can accurately and efficiently realize the orientation of the through-the-earth communication signal by adjusting the position of the buried electrode pair, thereby improving the efficiency of the orientation operation.
Description
Technical Field
The invention relates to the technical field of through-the-earth communication, in particular to a directional device and a directional method for through-the-earth communication.
Background
The prior electrode through-the-earth communication technology is applied to occasions such as mining, tunnel rescue and the like; the electrode ground penetrating communication technology adopts a very low frequency or a low frequency band, the electrode is inserted into a soil layer, the soil layer is used as a dielectric medium, and a signal sent by the electrode at one end can penetrate through the soil layer to generate induction on the electrode at the other end, so that information is transmitted.
The through-the-earth communication signal has the characteristic of directionality due to the characteristics of electric field distribution, and the transmitting device can be oriented according to the signal intensity, so that the direction of the transmitting device is determined, or the receiving direction is adjusted to improve the receiving performance; however, performing the directional operation in a larger range may affect the efficiency of the directional operation.
Disclosure of Invention
The invention provides a device and a method for orienting through-the-earth communication, which can accurately and efficiently orient through-the-earth communication signals by adjusting the positions of buried electrode pairs, and improve the efficiency of orienting operation.
The invention provides a directional device for through-the-earth communication, which comprises:
the directional range setting module is used for setting the directional range of signal transmission;
the ground penetrating communication device setting module is used for setting one or more pairs of buried electrodes as a transceiving electrode pair; the receiving-transmitting electrode pair is used for receiving a plurality of through-the-earth communication signals;
the mechanical control module is used for adjusting the position of the transceiving electrode pair within the orientation range;
and the received signal processing module is used for measuring a plurality of received signals, determining a plurality of received signal strength values and obtaining the target positions of the corresponding transceiving electrode pairs based on the plurality of received signal strength values.
Furthermore, the orientation range is set to different target azimuth values according to different work scene regions, and the target azimuth value is smaller than 180 degrees.
Further, the machine control module includes: and automatically adjusting the positions of the transceiving electrode pairs according to a fixed time interval in a preset time period.
Further, the received signal processing module comprises a signal strength determining unit and a transmitting-receiving electrode pair position determining unit;
the signal strength determining unit is used for measuring a plurality of received signals, obtaining an average signal-to-noise ratio of the received signals, and determining a received signal strength value according to the average signal-to-noise ratio;
and the transceiving electrode pair position determining unit is used for comparing the plurality of received signal strength values, and determining the first position where the transceiving electrode pair is located corresponding to the value with the maximum received signal strength value as the target position where the transceiving electrode pair is located.
Further, the transceiver electrode pair position determination unit further corrects the first position:
acquiring environmental data of a region of a working scene where a transmitting-receiving electrode pair is located;
acquiring the path loss of the through-the-earth communication signal based on a preset path loss model according to the environment data;
acquiring a correction parameter of the through-the-earth communication signal based on a preset path loss-correction parameter comparison library, and correcting the path loss of the through-the-earth communication signal according to the correction parameter to obtain an intensity attenuation value of the through-the-earth communication signal;
obtaining the distance between the transceiving electrode pair and the received signal processing module according to a preset signal intensity attenuation value and a distance relation matching library of the transceiving electrode pair, and carrying out position positioning calculation according to the distance to obtain a second position where the transceiving electrode pair is located;
and correcting the first position according to the second position and preset correction parameters to obtain a corrected first position.
Further, after the target position where the transceiving electrode pair is located is determined, the receiving signal processing module sends control information to the mechanical control module; the mechanical control module adjusts the transmitting-receiving electrode pair to the target position to carry out subsequent through-the-earth communication.
The system further comprises an orientation module, wherein the orientation module adopts a preset orientation method to orient the through-the-earth communication signal emission source based on the target position.
Further, the orientation method comprises:
acquiring a first positioning point and a second positioning point where the transceiving electrode at the target position is located;
connecting the first positioning point and the second positioning point to generate a positioning point connecting line;
acquiring a midpoint of a locating point connecting line, and drawing a vertical line passing through the midpoint and the locating point connecting line;
the incoming line direction of the vertical line is taken as the direction in which the through-the-earth communication signal emission source is located.
Furthermore, the mechanical control module further comprises a direction finding error correcting unit, which is used for correcting the directional azimuth angle of the through-the-earth communication signal according to a direction finding error acquired in advance;
the direction-finding error correction unit comprises a direction-finding error acquisition subunit and an error correction subunit;
the direction-finding error acquisition subunit is used for acquiring a radiation source radiation value of a working scene region; acquiring a plurality of measurement point positions of a working scene region, and measuring the signal strength of a preset test communication signal at the plurality of measurement point positions by using a direction-finding antenna to obtain a plurality of test signal strength values; obtaining a test azimuth angle value of the test communication signal according to the radiation value of the radiation source and the plurality of signal intensity values; acquiring a real azimuth value of the test communication signal, calculating a difference value between the test azimuth value and the real azimuth value of the test communication signal, and acquiring a direction-finding error;
the error correction subunit is used for measuring the signal strength of the through-the-earth communication signals by using the direction-finding antenna to obtain a plurality of through-the-earth communication signal strength values; obtaining an azimuth angle value of the through-the-earth communication signal according to the radiation value of the radiation source and the through-the-earth communication signal intensity value; and correcting the azimuth angle value according to the direction-finding error to obtain a corrected orientation azimuth angle.
The invention provides a directional method for through-the-earth communication, which comprises the following steps:
s11: setting a directional range of signal transmission;
s12: one or more pairs of buried electrodes are arranged as a transmitting-receiving electrode pair and used for receiving a plurality of through-the-earth communication signals;
s13: adjusting the position of the transceiving electrode pair according to the orientation range;
s14: measuring the plurality of received signals to obtain a plurality of received signal strength values;
s15: based on the received signal strength value, orienting a through-the-earth communication signal emission source;
s16: and performing subsequent through-the-earth communication based on the directional through-the-earth communication signal emission source.
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 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 drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which 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 principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a block diagram of the present invention for a direction device for through-the-earth communication;
FIG. 2 is a schematic diagram of the ground penetrating communication direction device for ground penetrating communication direction within the direction range according to the present invention;
fig. 3 is a flow chart of the method for through-the-earth communication direction of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The present invention provides a directional device for through-the-earth communication, as shown in fig. 1, comprising:
the directional range setting module is used for setting the directional range of signal transmission;
the ground penetrating communication device setting module is used for setting one or more pairs of buried electrodes into a transmitting and receiving electrode pair which is used for receiving a plurality of ground penetrating communication signals;
the mechanical control module is used for adjusting the position of the transceiving electrode pair within the orientation range;
and the received signal processing module is used for measuring a plurality of received signals, determining a plurality of received signal strength values and obtaining the target positions of the corresponding transceiving electrode pairs based on the plurality of received signal strength values.
The working principle of the technical scheme is as follows: the orientation device comprises: the directional range setting module is used for setting the directional range of signal transmission; the ground penetrating communication device setting module is used for setting one or more pairs of buried electrodes into a transmitting and receiving electrode pair which is used for receiving a plurality of ground penetrating communication signals; the mechanical control module is used for adjusting the position of the transceiving electrode pair within the orientation range; and the received signal processing module is used for measuring a plurality of received signals, determining a plurality of received signal strength values and obtaining the target positions of the corresponding transceiving electrode pairs based on the plurality of received signal strength values.
The beneficial effects of the above technical scheme are: by adopting the scheme provided by the embodiment, the orientation of the through-the-earth communication signal can be accurately and efficiently realized by adjusting the position of the buried electrode pair, and the efficiency of the orientation operation is improved.
In one embodiment, the through-the-earth communication direction device may be implemented as a terminal device or a base station device for tunnel rescue communication; the parameter setting module is configured to set the orientation range to have different values in different working scenes, and the orientation range sets the target azimuth to be less than 180 degrees.
The working principle of the technical scheme is as follows: the directional parameters are set, so that the device is beneficial to better adapting to different working scene regions, the operation adaptation range of the directional device is ensured, and the through-the-earth communication directional device can be realized as terminal equipment or base station equipment for tunnel rescue communication; the parameter setting module is configured to set the orientation range to have different values in different work scene regions, and the orientation range sets the target azimuth to be less than 180 degrees.
The beneficial effects of the above technical scheme are: by adopting the scheme provided by the embodiment, the efficiency of orienting the sending end through-the-earth communication is improved according to the set orientation range, and quick orientation is carried out, so that the efficiency of through-the-earth communication is improved, and the method can be used for positioning people trapped in tunnel communication.
In one embodiment, as shown in FIG. 2, a schematic diagram of through-the-earth communication orientation within an orientation range according to one embodiment of the present application; the figure comprises a ground-penetrating signal transceiving electrode pair #2 connected to a ground-penetrating signal transmitter and a ground-penetrating signal transceiving electrode pair #1 connected to a ground-penetrating signal receiver, wherein the ground-penetrating signal transceiving electrode pair #1 is positioned at a position #1 in sequence ′ And position #2 ′ Position #1 ′ And position #2 ′ Are within the set orientation range. When the ground-penetrating signal transceiving electrode pair #1 is at the position #1 ′ Time, the received signal-to-noise ratio #1 is measured based on the transmitted signal - (ii) a When the ground-penetrating signal transceiving electrode pair #1 is at the position #2 ′ Time, the received signal to noise ratio #2 was measured based on the transmitted signal - (ii) a Will receive signal to noise ratio #1 - And is connected withSignal to noise ratio #2 - Comparing to obtain a received signal-to-noise ratio #2 - Greater than received signal-to-noise ratio #1 - Therefore, the through-ground signal receiver determines that the through-ground signal transmitting-receiving electrode pair #1 is at the position #2 ′ The vertical direction of the connecting line between the two electrodes is the signal source direction.
The working principle and the beneficial effects of the technical scheme are as follows: by comparing the signal-to-noise ratio, the signal intensity can be accurately reflected, the direction of the through-the-earth communication signal emission source is determined, and the accuracy of determining the signal intensity is improved.
In one embodiment, the received signal processing module comprises a signal strength determination unit, a transceiving electrode pair position determination unit;
the signal strength determining unit is used for measuring a plurality of received signals, obtaining an average signal-to-noise ratio of the received signals, and determining a received signal strength value according to the average signal-to-noise ratio;
and the transceiving electrode pair position determining unit is used for comparing the plurality of received signal strength values, and determining the first position where the transceiving electrode pair is located corresponding to the value with the maximum received signal strength value as the target position where the transceiving electrode pair is located.
The transceiver electrode pair position determination unit further comprises correcting the first position:
acquiring environmental data of a region of a working scene where a transmitting-receiving electrode pair is located;
acquiring the path loss of the through-the-earth communication signal based on a preset path loss model according to the environment data;
acquiring a correction parameter of the through-the-earth communication signal based on a preset path loss-correction parameter comparison library, and correcting the path loss of the through-the-earth communication signal according to the correction parameter to obtain an intensity attenuation value of the through-the-earth communication signal;
obtaining the distance between the transmitting-receiving electrode pair and the received signal processing module according to a preset signal intensity attenuation value and a transmitting-receiving electrode pair distance relation matching library, and performing position positioning calculation according to the distance to obtain a second position of the transmitting-receiving electrode pair;
and correcting the first position according to the second position and preset correction parameters to obtain a corrected first position.
The working principle of the technical scheme is as follows: the received signal processing module comprises a signal intensity determining unit and a transmitting-receiving electrode pair position determining unit; the signal strength measuring device is used for measuring a plurality of received signals, obtaining the average signal-to-noise ratio of the received signals and determining the received signal strength value according to the average signal-to-noise ratio; and then comparing the multiple through-the-earth communication signal strength values, and determining the first position where the transceiving electrode pair corresponding to the maximum through-the-earth communication signal strength value is located as the target position where the transceiving electrode pair is located.
In the aspect of determining the first position of the receiving and transmitting electrode pair to correct, the method firstly acquires the environmental data of the region of the working scene where the receiving and transmitting electrode pair is located;
then, according to the environment data, based on a preset path loss model, acquiring the path loss of the through-the-earth communication signal; acquiring a correction parameter of the through-the-earth communication signal through a preset path loss-correction parameter comparison library, and correcting the path loss of the through-the-earth communication signal according to the correction parameter to acquire a through-the-earth communication signal intensity attenuation value; finally, according to a preset signal intensity attenuation value and a distance relation matching library of the transceiving electrode pairs, obtaining the distance between the transceiving electrode pairs and the received signal processing module, and performing position positioning calculation according to the distance to obtain a second position where the transceiving electrode pairs are located; and correcting the first position according to the second position and preset correction parameters to obtain a corrected first position.
The signals received by the receiving and processing module are extremely tiny differential signals, and in order to further process the signals, the signals need to be differentially received after being received and amplified to a certain amplitude; a primary amplifier is required to be added in a received signal processing module; since the antenna end receives a large amount of common mode noise in addition to a tiny differential signal, a chip with a high common mode rejection ratio should be selected when the amplifier is selected, so that the noise of the amplified signal is as small as possible. For the whole set of amplifying and filtering circuit, the final noise is generated by the superposition of the noise of each module, and the overall noise coefficient calculation formula of the cascade circuit is as follows:
wherein, P α Is the noise figure, P, of the overall cascaded circuit 1 、P 2 、P 3 、P i The noise coefficients of the first stage, the second stage, the third stage and the ith stage of the circuit, K 1 、K 2 、K γ Gains of the first stage, the second stage and the gamma stage circuits; from the above formula, the noise coefficient of the whole system is mainly determined by the noise coefficient of the first stage circuit module; in order to reduce the overall noise coefficient of the system, a low-noise pre-amplifier circuit should be selected as a primary amplifier module to ensure that the noise of the amplified signal is controlled within a minimum range, thereby facilitating the identification of the through-the-earth communication signal.
The beneficial effects of the above technical scheme are: by adopting the scheme provided by the embodiment, the positions of the transmitting and receiving electrode pairs can be more accurately determined by arranging the signal strength determining unit and the transmitting and receiving electrode pair position determining unit; the precision of position positioning can be more accurately improved by setting a path loss model, a path loss-correction parameter comparison library and a signal intensity attenuation value and electrode pair distance relation matching library by utilizing a data matching relation; through the calculation of the signal noise of the amplifier of the receiving processing module, a data basis is provided for selecting the preposed low-noise amplifying circuit with smaller noise as a primary amplifying module, and the amplifying circuit meeting the requirements of the embodiment is ensured to be selected, so that the identification precision of the through-the-earth communication signal is improved.
In one embodiment, the mechanical control module further includes a direction-finding error correction unit, configured to correct a directional azimuth angle of the through-the-earth communication signal according to a direction-finding error obtained in advance;
the direction-finding error correction unit comprises a direction-finding error acquisition subunit and an error correction subunit;
the direction finding error acquisition subunit is used for acquiring a radiation source radiation value of a working scene region; acquiring a plurality of measurement point positions of a working scene region, and measuring the signal strength of a preset test communication signal at the plurality of measurement point positions by using a direction-finding antenna to obtain a plurality of test signal strength values; obtaining a test azimuth angle value of the test communication signal according to the radiation value of the radiation source and the signal intensity values; acquiring a real azimuth value of the test communication signal, calculating a difference value between the test azimuth value and the real azimuth value of the test communication signal, and acquiring a direction-finding error;
the error correction subunit is used for measuring the signal strength of the through-the-earth communication signals by using the direction-finding antenna to obtain a plurality of through-the-earth communication signal strength values; obtaining an azimuth angle value of the through-the-earth communication signal according to the radiation value of the radiation source and the through-the-earth communication signal intensity value; and correcting the azimuth angle value according to the direction-finding error to obtain a corrected orientation azimuth angle.
The working principle of the technical scheme is as follows: because the influence of the test field and the surrounding environment on the direction-finding error cannot be completely eliminated, the error cannot be avoided in the direction-finding process, and the correct orientation result can be obtained after the direction-finding error is corrected; the embodiment also comprises a direction-finding error correction unit, which is used for correcting the directional azimuth angle of the through-the-earth communication signal according to the direction-finding error acquired in advance; the direction-finding error correction unit comprises a direction-finding error acquisition subunit and an error correction subunit;
the direction-finding error acquisition subunit is used for acquiring a radiation source radiation value of a working scene region; acquiring a plurality of measurement point positions of a working scene region, and measuring the signal strength of a preset test communication signal at the plurality of measurement point positions by using a direction-finding antenna to obtain a plurality of test signal strength values; obtaining a test azimuth angle value of the test communication signal according to the radiation value of the radiation source and the plurality of signal intensity values; acquiring a real azimuth value of the test communication signal, calculating a difference value between the test azimuth value and the real azimuth value of the test communication signal, and acquiring a direction-finding error;
the error correction subunit is configured to measure the signal strength of the through-the-earth communication signal by using the direction-finding antenna, and obtain a plurality of through-the-earth communication signal strength values; obtaining an azimuth angle value of the through-the-earth communication signal according to the radiation value of the radiation source and the through-the-earth communication signal intensity value; and correcting the azimuth angle value according to the direction-finding error to obtain a corrected directional azimuth angle.
The beneficial effects of the above technical scheme are: by adopting the scheme provided by the embodiment, the accuracy of the orientation result can be ensured by correcting the direction-finding error.
In one embodiment, as shown in fig. 3, a flow diagram of a method for through-the-earth communication direction according to one embodiment of the present application, the method comprising: setting an orientation range (S11); receiving a plurality of through-the-earth communication signals by using one or more pairs of buried electrodes as a transceiving electrode pair (S12); changing the position of the transceiving electrode pair within the orientation range (S13); measuring the plurality of through-the-earth communication signals to obtain a plurality of corresponding received signal strength values, wherein the plurality of received signal strength values respectively correspond to different positions where the transceiving electrode pairs are located (S14);
in step S11, the orientation range may take different values in different working scenarios. In step S11, the orientation range may be less than 180 degrees;
in step S13, the position of the transceiving electrode pair may be automatically changed at fixed time intervals within a first period of time;
in step S14, the average signal-to-noise ratio of the received signal may be taken as the received signal strength;
in step S14, channel measurement may be performed based on the known through-the-earth communication signals to obtain a plurality of received signal strengths, and the received signal strengths are compared to determine a maximum received signal strength therein, where the maximum received signal strength corresponds to a target location where the transceiving electrode pair is located;
illustratively, the method further comprises the step of orienting (S15) the signal source based on the target position, which is shown by a dashed box;
for example, in step S15, the transceiver electrode pair at the target position may be connected as two points, and a direction perpendicular to the connection line may be a direction in which the signal source is located;
exemplarily, the method further includes moving the transceiver electrode pair to the target position for subsequent through-the-earth communication after the maximum received signal strength is determined by the received signal processing module (S16);
the working principle and the advantageous effects of the above technical solutions are already recited in the claims of the apparatus for through-the-earth communication orientation of the present invention, and are not repeated.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. An orientation apparatus for through-the-earth communication, comprising:
the directional range setting module is used for setting the directional range of signal transmission;
the ground penetrating communication device setting module is used for setting one or more pairs of buried electrodes into a transmitting and receiving electrode pair which is used for receiving a plurality of ground penetrating communication signals;
the mechanical control module is used for adjusting the position of the transceiving electrode pair within the orientation range;
the receiving signal processing module is used for measuring a plurality of receiving signals, determining a plurality of receiving signal strength values and obtaining the target positions of the corresponding transceiving electrode pairs based on the plurality of receiving signal strength values;
the receiving signal processing module comprises a signal intensity determining unit and a transmitting-receiving electrode pair position determining unit;
the signal strength determining unit is used for measuring a plurality of received signals, obtaining an average signal-to-noise ratio of the received signals, and determining a received signal strength value according to the average signal-to-noise ratio;
the receiving and transmitting electrode pair position determining unit is used for comparing the multiple receiving signal strength values, and determining a first position where the receiving and transmitting electrode pair is located corresponding to the value with the maximum receiving signal strength value as a target position where the receiving and transmitting electrode pair is located;
the transceiver electrode pair position determining unit further comprises correcting the first position:
acquiring environmental data of a region of a working scene where a transmitting-receiving electrode pair is located;
acquiring the path loss of the through-the-earth communication signal based on a preset path loss model according to the environment data;
acquiring a correction parameter of the through-the-earth communication signal based on a preset path loss-correction parameter comparison library, and correcting the path loss of the through-the-earth communication signal according to the correction parameter to obtain an intensity attenuation value of the through-the-earth communication signal;
obtaining the distance between the transmitting-receiving electrode pair and the received signal processing module according to a preset signal intensity attenuation value and a transmitting-receiving electrode pair distance relation matching library, and performing position positioning calculation according to the distance to obtain a second position of the transmitting-receiving electrode pair;
and correcting the first position according to the second position and preset correction parameters to obtain a corrected first position.
2. The direction finder for through-the-earth communication of claim 1, wherein the direction finding range is set to different target azimuth values according to different work scene zones, and the target azimuth value is less than 180 degrees.
3. The device of claim 1, wherein the mechanical control module comprises: and automatically adjusting the positions of the transceiving electrode pairs according to a fixed time interval in a preset time period.
4. The device for directional orientation for through-the-earth communication of claim 1, wherein after the target location where the transceiver electrode pair is located is determined, the received signal processing module sends control information to the mechanical control module; the mechanical control module adjusts the receiving-transmitting electrode pair to the target position to carry out subsequent through-the-earth communication.
5. The device as claimed in claim 1, further comprising an orientation module for orienting the through-the-earth communication signal emission source by a preset orientation method based on the target position.
6. The direction device for through-the-earth communication of claim 5, wherein the direction method comprises:
acquiring a first positioning point and a second positioning point where the transceiving electrode at the target position is located;
connecting the first positioning point and the second positioning point to generate a positioning point connecting line;
acquiring a midpoint of a locating point connecting line, and drawing a vertical line passing through the midpoint and the locating point connecting line;
the incoming line direction of the vertical line is taken as the direction in which the through-the-earth communication signal emission source is located.
7. The orientation device for through-the-earth communication according to claim 1, wherein the mechanical control module further comprises a direction error correction unit for correcting an orientation azimuth angle of the through-the-earth communication signal according to a direction error obtained in advance;
the direction-finding error correction unit comprises a direction-finding error acquisition subunit and an error correction subunit;
the direction-finding error acquisition subunit is used for acquiring a radiation source radiation value of a working scene region; acquiring a plurality of measurement point positions of a working scene region, and measuring the signal strength of a preset test communication signal at the plurality of measurement point positions by using a direction-finding antenna to obtain a plurality of test signal strength values; obtaining a test azimuth angle value of the test communication signal according to the radiation value of the radiation source and the plurality of signal intensity values; acquiring a real azimuth value of the test communication signal, calculating a difference value between the test azimuth value and the real azimuth value of the test communication signal, and acquiring a direction-finding error;
the error correction subunit is used for measuring the signal strength of the through-the-earth communication signals by using the direction-finding antenna to obtain a plurality of through-the-earth communication signal strength values; according to the radiation value of the radiation source and the through-the-earth communication signal intensity value, an azimuth angle value of the through-the-earth communication signal is obtained; and correcting the azimuth angle value according to the direction-finding error to obtain a corrected directional azimuth angle.
8. A directional method for through-the-earth communications, comprising:
s11: setting a directional range of signal transmission;
s12: one or more pairs of buried electrodes are arranged as a transmitting-receiving electrode pair and used for receiving a plurality of through-the-earth communication signals;
s13: adjusting the position of the transceiving electrode pair according to the orientation range;
s14: measuring the plurality of received signals to obtain a plurality of received signal strength values;
s15: based on the received signal strength value, orienting a through-the-earth communication signal emission source;
s16: performing subsequent through-the-earth communication based on the directional through-the-earth communication signal emission source;
s14 comprises the following steps: measuring a plurality of received signals, obtaining an average signal-to-noise ratio of the received signals, and determining a received signal strength value according to the average signal-to-noise ratio;
s15 comprises the following steps: comparing the multiple received signal strength values, and determining a first position where the transceiving electrode pair corresponding to the value with the maximum received signal strength value is located as a target position where the transceiving electrode pair is located;
s15 further comprises correcting the first position:
acquiring environmental data of a region of a working scene where a transmitting-receiving electrode pair is located;
acquiring the path loss of the through-the-earth communication signal based on a preset path loss model according to the environment data;
acquiring a correction parameter of the through-the-earth communication signal based on a preset path loss-correction parameter comparison library, and correcting the path loss of the through-the-earth communication signal according to the correction parameter to obtain an intensity attenuation value of the through-the-earth communication signal;
obtaining the distance between the transceiving electrode pair and the received signal processing module according to a preset signal intensity attenuation value and a distance relation matching library of the transceiving electrode pair, and carrying out position positioning calculation according to the distance to obtain a second position where the transceiving electrode pair is located;
and correcting the first position according to the second position and preset correction parameters to obtain a corrected first position.
Priority Applications (1)
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| US5337002A (en) * | 1991-03-01 | 1994-08-09 | Mercer John E | Locator device for continuously locating a dipole magnetic field transmitter and its method of operation |
| GB0105910D0 (en) * | 2001-03-09 | 2001-04-25 | Cellular Design Services Ltd | Measurement-based prediction method for radiation path loss |
| DE102011117591B4 (en) * | 2011-11-03 | 2013-12-24 | Atlas Elektronik Gmbh | Method and device for correcting systematic bearing errors |
| CN103312420A (en) * | 2013-05-29 | 2013-09-18 | 北京工业大学 | Magnetic conductance through-the-earth communication device and method |
| CN204465520U (en) * | 2015-03-06 | 2015-07-08 | 成都希盟泰克科技发展有限公司 | A kind of wireless through the earth communication optimal frequency choice device |
| CN111628945A (en) * | 2019-02-28 | 2020-09-04 | 北京信息科技大学 | Method and device in node equipment for electrode through-the-earth communication |
| CN111628830A (en) * | 2019-02-28 | 2020-09-04 | 北京信息科技大学 | Method and device for node equipment for electrode through-the-earth communication based on selection principle |
| CN111025231B (en) * | 2019-11-08 | 2021-09-14 | 北京交通大学 | Magnetic induction through-the-earth positioning method based on signal direction |
| CN111220947B (en) * | 2019-11-08 | 2022-02-18 | 北京交通大学 | Magnetic induction through-the-earth positioning method based on path loss |
| CN112187374A (en) * | 2020-09-22 | 2021-01-05 | 北京信息科技大学 | Apparatus and method for through-the-earth communication |
| CN112910571A (en) * | 2021-03-05 | 2021-06-04 | 北京信息科技大学 | Apparatus and method for through-the-earth communication |
| CN113300785A (en) * | 2021-05-30 | 2021-08-24 | 中国交通信息科技集团有限公司 | Device for through-the-earth communication |
| CN113300784A (en) * | 2021-05-30 | 2021-08-24 | 中国交通信息科技集团有限公司 | Receiving device and method for through-the-earth communication |
| CN113596985B (en) * | 2021-07-07 | 2022-05-20 | 湘潭大学 | Signal intensity positioning device and method based on path loss correction model |
| CN114460361A (en) * | 2021-12-29 | 2022-05-10 | 宜昌测试技术研究所 | Real-time monitoring method for extremely-low-frequency through-earth electromagnetic signal |
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