Orthogonal magnetic loop antenna, azimuth calibration method and calibration device

Abstract

The present invention provides an orthogonal magnetic loop antenna, an azimuth calibration method, and a calibration device, comprising a magnetic field antenna assembly and an electric field antenna. The magnetic field antenna assembly comprises a top plate, a bottom plate, a first column group, a second column group, a first induction antenna, a second induction antenna, and a circuit board. The first column group and the second column group are both connected to the top plate and the bottom plate, the circuit board is fixed to the top end surface of the bottom plate, the first induction antenna extends along a first path on the first column group and between the top plate and the bottom plate, forming a ring structure surrounding the outside of the circuit board and connected to the circuit board, and the second induction antenna extends along a second path on the second column group and between the top plate and the bottom plate, forming a ring structure surrounding the outside of the circuit board and connected to the circuit board. The present invention facilitates installation of the first and second induction antennas and simplifies the installation method of the first and second induction antennas.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning monitoring and early warning, and in particular to an orthogonal magnetic loop antenna, an azimuth calibration method, and a calibration device. Background Art

[0002] The formation and occurrence of lightning are accompanied by a variety of physical effects, including changes in the atmospheric electric field caused by lightning formation and occurrence, as well as flashes, strong electromagnetic radiation, and high currents generated by lightning discharges. These physical effects can severely harm production and daily life in industries such as electricity, communications, transportation, and petrochemicals.

[0003] Ground-based atmospheric electric field detection equipment is one of the important devices for lightning early warning. Among them, the orthogonal magnetic ring antenna is one of the important components for lightning signal detection.

[0004] Patent publication number CN102175929A discloses an integrated synchronous comprehensive observation system for lightning electromagnetic signals, including a three-dimensional magnetic antenna with a three-dimensional cage structure composed of a first vertical orthogonal magnetic ring, a second vertical orthogonal magnetic ring, and a horizontal magnetic ring. The first vertical orthogonal magnetic ring, the second vertical orthogonal magnetic ring, and the horizontal magnetic ring are perpendicular to each other and are all composed of a non-magnetic metal shield and a metal wire coil wound on a skeleton. The non-magnetic metal shield is used to shield crosstalk of magnetic field signals, and the metal wire coil is used to sense magnetic field changes. The number of turns of the wire coil depends on the detection sensitivity requirements.

[0005] However, the metal wire coil is arranged on the frame in a winding manner, and the detection sensitivity corresponds to the number of turns of the wire coil, which cannot increase the installation efficiency of the wire coil and is not convenient for adjusting the detection sensitivity later. Summary of the Invention

[0006] In order to solve the above-mentioned problems, the present invention provides an orthogonal magnetic loop antenna, an azimuth calibration method and a calibration device, which facilitate the installation of the first sensing antenna and the second sensing antenna and simplify the installation method of the first sensing antenna and the second sensing antenna.

[0007] To achieve the above-mentioned objectives, in a first aspect, the present invention provides an orthogonal magnetic loop antenna for collecting magnetic field signals, comprising a magnetic field antenna assembly and an electric field antenna fixed on the top of the magnetic field antenna assembly, wherein the magnetic field antenna assembly comprises a top plate, a bottom plate, a first column group, a second column group, a first induction antenna, a second induction antenna and a circuit board, wherein the first column group and the second column group are both connected to the top plate and the bottom plate, the circuit board is fixed on the top end surface of the bottom plate, the first induction antenna extends along a first path on the first column group and between the top plate and the bottom plate to form a ring structure surrounding the outside of the circuit board and connected to the circuit board, and the second induction antenna extends along a second path on the second column group and between the top plate and the bottom plate to form a ring structure surrounding the outside of the circuit board and connected to the circuit board.

[0008] In one embodiment, the first sensing antenna is perpendicular to the second sensing antenna, and in an orthographic projection perspective, a portion of the first sensing antenna overlaps a portion of the second sensing antenna.

[0009] In one embodiment, the first column group includes a first column a and a first column b, wherein the first column a and the first column b are opposite to each other and spaced apart, and the first sensing antenna extends along a first path in sequence through the first column a, the space between the first column a and the first column b, and the first column b, and then connects to both ends of the circuit board;

[0010] The second column group includes a second column a and a second column b, wherein the second column a and the second column b are opposite to each other and are arranged at intervals. The second sensing antenna extends along the second path in sequence on the second column a, the interval area between the second column a and the second column b, and the second column b, and is then connected to both ends of the circuit board.

[0011] In one embodiment, a gap is formed between the first sensing antenna and the first pillar a and the first pillar b;

[0012] A gap is formed between the second sensing antenna and the second pillar a and the second pillar b.

[0013] In one embodiment, a first upper support member a and a first lower support member a are provided on the first column a, a first upper support member b and a first lower support member b are provided on the first column b, and a portion of the first sensing antenna is placed in the first upper support member a, the first lower support member a, the first upper support member b, and the first lower support member b;

[0014] A second upper support member a and a second lower support member a are provided on the second column a, a second upper support member b and a second lower support member b are provided on the second column b, and a portion of the second sensing antenna is placed in the second upper support member a, the second lower support member a, the second upper support member b and the second lower support member b.

[0015] In one embodiment, first grooves are formed in the first upper support member a, the first lower support member a, the first upper support member b, and the first lower support member b, and a portion of the first sensing antenna is placed in each of the first grooves;

[0016] Second grooves are formed in the second upper support member a, the second lower support member a, the second upper support member b, and the second lower support member b, and a portion of the second sensing antenna is placed in each of the second grooves.

[0017] In one embodiment, the circuit board is solidified with a first interface a, a first interface b, a second interface a, a second interface b, a first connecting column a, a first connecting column b, a second connecting column a and a second connecting column b, wherein the first interface a and the first interface b are respectively connected to the first connecting column a and the first connecting column b, the second interface a and the second interface b are respectively connected to the second connecting column a and the second connecting column b, the two ends of the first sensing antenna are respectively connected to the first interface a and the first interface b, the two ends of the second sensing antenna are respectively connected to the second interface a and the second interface b, and the first connecting column a and the first connecting column b, as well as the second connecting column a and the second connecting column b are all connected to the processor via transmission lines.

[0018] In one embodiment, a protective plate is further provided on the outer sides of the first column group, the second column group and the circuit board, wherein the protective plate is made of a conductive material or a material containing a conductive substance.

[0019] In one embodiment, the electric field antenna is connected to the processor via a transmission line.

[0020] In a second aspect, the present invention further provides an azimuth calibration method for calibrating the azimuth of the above-mentioned orthogonal magnetic loop antenna, comprising the following steps:

[0021] After the orthogonal magnetic loop antenna is rotated to the current detection position, the electric field antenna and the magnetic field antenna assembly collect the magnetic field signal released outward by the lightning signal simulation device and obtain the current detection position of the orthogonal magnetic loop antenna;

[0022] Calling the preset calibration azimuth when the orthogonal magnetic loop antenna is in the current detection position;

[0023] Obtaining the current azimuth angle of the magnetic field antenna assembly when it is at the current detection position;

[0024] The current azimuth angle is compared with the calibration azimuth angle. If it is determined that the current azimuth angle is inconsistent with the calibration azimuth angle, the current azimuth angle is adjusted to be consistent with the calibration azimuth angle.

[0025] In a third aspect, the present invention further provides a calibration device for implementing the above-mentioned azimuth calibration method, comprising:

[0026] Lightning signal simulation equipment generates and releases a set magnetic field signal according to input instructions;

[0027] A rotating assembly is fixed inside the lightning signal simulation device and rotates the orthogonal magnetic loop antenna to a current detection position;

[0028] an orthogonal magnetic loop antenna, fixed to the rotating assembly, comprising an electric field antenna and a magnetic field antenna assembly, wherein the electric field antenna is fixed to the top end surface of the magnetic field antenna assembly, wherein the electric field antenna and the magnetic field antenna assembly each obtain a magnetic field signal;

[0029] a processor, configured to obtain at least a first magnetic field signal value, a second magnetic field signal value, a preset calibration azimuth corresponding to a current detection position, and a preset calibration magnetic field signal value;

[0030] Obtaining a current azimuth angle according to the first magnetic field signal value and the second magnetic field signal value;

[0031] The current azimuth angle is compared with the calibrated azimuth angle. If it is determined that the current azimuth angle is inconsistent with the calibrated azimuth angle, the current azimuth angle is adjusted to be consistent with the calibrated azimuth angle.

[0032] Compared with the prior art, the present invention has one of the following advantages:

[0033] In the present invention, the first sensing antenna is arranged on the first column group along the first path and then connected to the circuit board, and the second sensing antenna is arranged on the second column group along the second path and then connected to the circuit board. This facilitates the installation of the first sensing antenna and the second sensing antenna, simplifies the installation method of the first sensing antenna and the second sensing antenna, and there is no need to set the number of turns of the first sensing antenna and the second sensing antenna according to the detection sensitivity in the later stage.

[0034] The circuit board is fixed on the top end surface of the base plate, which can reduce the volume of the orthogonal magnetic loop antenna;

[0035] The calibration method and calibration device of the present invention can accurately calibrate the azimuth of the lightning detection component to ensure that the current azimuth is the same as the calibrated azimuth, thereby ensuring the accuracy and reliability of the lightning detection component. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a three-dimensional diagram of the orthogonal magnetic loop antenna in this embodiment;

[0037] Figure 2 for Figure 1 Exploded view of

[0038] Figure 3 is a flow chart of the calibration method of the present invention;

[0039] Figure 4 This is a flow chart of a first embodiment of the calibration method of the present invention;

[0040] Figure 5 is a flow chart of a second embodiment of the calibration method of the present invention;

[0041] Figure 6 It is a three-dimensional diagram of the calibration device in this embodiment.

[0042] The main reference numerals are as follows:

[0043] 1-Lightning signal simulation device; 2-Electric field antenna; 201-Gap; 3-Magnetic field antenna assembly; 301-Top plate; 302-Bottom plate; 303-First column a; 304-First column b; 305-First sensing antenna; 306-First upper support a; 307-First lower support a; 308-First upper support b; 309-First lower support b; 310-Second column a; 311-Second column b; 312-Second sensing antenna; 313-Second upper support a; 314-Second lower support a; 315-Second lower support b; 316-Circuit board; 4-Rotation assembly; 401-Bottom fixing member; 402-Handle assembly; 403-Dial; 404-Tray; 405-Pointer; 5-Orthogonal magnetic loop antenna. DETAILED DESCRIPTION

[0044] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the embodiments described 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 without making creative efforts are within the scope of protection of the present invention.

[0045] like Figure 1 and Figure 2 As shown, this embodiment provides an orthogonal magnetic loop antenna 5 for collecting signals, including a magnetic field antenna component 3 and an electric field antenna 2 fixed on the top of the magnetic field antenna component 3.

[0046] In this embodiment, the electric field antenna 2 may be, but is not limited to, an electric field fast-varying antenna, an electric field slow-varying antenna, or an electric field induction antenna.

[0047] Preferably, the electric field antenna 2 is an electric field fast-changing antenna, which generates a third magnetic field signal after collecting the magnetic field signal released outward by the Helmholtz coil.

[0048] In addition, the electric field antenna 2 is connected to an external third processor through a third transmission line to input the third magnetic field signal into the third processor.

[0049] In this embodiment, the magnetic field antenna assembly 3 includes a top plate 301, a bottom plate 302, a first column group, a second column group, a first sensing antenna 305, a second sensing antenna 312, and a circuit board 316. The first column group and the second column group are both connected to the top plate 301 and the bottom plate 302, and the circuit board 316 is fixed to the top end surface of the bottom plate 302. The first sensing antenna 305 extends along a first path on the first column group and between the top plate 301 and the bottom plate 302, forming a ring structure surrounding the outside of and connected to the circuit board 316, for collecting the first magnetic field signal released by the lightning signal simulation device. The second sensing antenna 312 extends along a second path on the second column group and between the top plate 301 and the bottom plate 302, forming a ring structure surrounding the outside of and connected to the circuit board 316, for collecting the second magnetic field signal released by the lightning signal simulation device.

[0050] Specifically, the top plate 301 is shaped like a cross, and a plurality of supporting protrusions are provided on the top end face of each end of the cross. The electric field antenna 2 is provided on the top of the top plate 301 through the plurality of supporting protrusions and faces the lightning signal simulation device.

[0051] Specifically, the shape of the bottom plate 302 is roughly similar to a cross structure. The circuit board 316 is fixed to the bottom plate 302 through support columns and fasteners and is located at the center of the bottom plate 302.

[0052] Furthermore, the bottom plate 302 includes a square platform and extensions connected to the sidewalls of the platform, wherein the extensions are located directly below the end portions.

[0053] Specifically, the first sensing antenna 305 is perpendicular to the second sensing antenna 312 , and in an orthographic projection perspective, a portion of the first sensing antenna 305 overlaps with a portion of the second sensing antenna 312 .

[0054] Furthermore, a portion of the first sensing antenna 305 is located above a portion of the second sensing antenna 312 .

[0055] Specifically, the first column group includes a first column a303 and a first column b304 with the same structure, wherein the first column a303 and the first column b304 are opposite to each other and arranged at intervals, and are correspondingly connected to the top plate 301 and the bottom plate 302 respectively through fasteners. The first sensing antenna 305 extends along the first path in sequence on the first column a303, the interval area between the first column a303 and the first column b304, and on the first column b304, and is then connected to both ends of the circuit board 316.

[0056] Furthermore, the first column a303 includes a first middle portion a, a first upper end portion a, and a first lower end portion a. The first upper end portion a and the first lower end portion a are fixed to the ends of the first middle portion a, respectively. The first upper end portion a includes a first upper through-hole a and a first upper connecting end a, and the first upper end portion a is connected to the adjacent end portion via the first connecting end a. The first lower end portion a includes a first lower through-hole a and a first lower connecting end a, and the first lower end portion a is connected to the adjacent extension end via the first lower connecting end a.

[0057] Furthermore, the first column b304 includes a first middle portion b, a first upper end b, and a first lower end b, with the first upper end b and the first lower end b being fixed to the ends of the first middle portion b. The first upper end b includes a first upper through-hole b and a first upper connecting end b, and the first upper end b is connected to the adjacent end via the first connecting end b. The first lower end b includes a first lower through-hole b and a first lower connecting end b, and the first lower end b is connected to the adjacent extension end via the first lower connecting end b.

[0058] Specifically, the second column group includes a second column a310 and a second column b311 with the same structure, wherein the second column a310 and the second column b311 are opposite to each other and are arranged at intervals, and are correspondingly connected to the top plate 301 and the bottom plate 302 respectively through fasteners. The second sensing antenna 312 extends along the second path in sequence on the second column a310, the interval area between the second column a310 and the second column b311, and on the second column b311, and is then connected to both ends of the circuit board 316.

[0059] Furthermore, the second column a310 includes a second middle portion a, a second upper end portion a, and a second lower end portion a. The second upper end portion a and the second lower end portion a are fixed to the ends of the second middle portion a, respectively. The second upper end portion a includes a second upper through-hole a and a second upper connecting end a, and the second upper end portion a is connected to the adjacent end portion via the second connecting end a. The second lower end portion a includes a second lower through-hole a and a second lower connecting end a, and the second lower end portion a is connected to the adjacent extension end via the second lower connecting end a.

[0060] Furthermore, the second column b311 includes a second middle portion b, a second upper end b, and a second lower end b. The second upper end b and the second lower end b are fixed to the ends of the second middle portion b. The second upper end b includes a second upper through hole b and a second upper connecting end b, and the second upper end b is connected to the adjacent end via the second connecting end b. The second lower end b includes a second lower through hole b and a second lower connecting end b, and the second lower end b is connected to the adjacent extension end via the second lower connecting end b.

[0061] In this embodiment, further, a gap is formed between the first sensing antenna 305 and the first column a303 and the first column b304, and a gap is formed between the second sensing antenna 312 and the second column a310 and the second column b311.

[0062] Furthermore, a first upper support member a306 and a first lower support member a307 are provided on the first column a303. A portion of the first upper support member a306 is fixed to the first upper end a, while the remaining portion is positioned in the first upper through-hole a. A portion of the first lower support member a307 is fixed to the first lower end a, while the remaining portion is positioned in the first lower through-hole a. Furthermore, a first groove for retaining the first sensing antenna 305 is formed on both the first upper support member a306 and the first lower support member a307.

[0063] Furthermore, a first upper support member b308 and a first lower support member b309 are provided on the first column b304. A portion of the first upper support member b308 is fixed to the first upper end b, while the remaining portion is positioned in the first upper through-hole b. A portion of the first lower support member b309 is fixed to the first lower end b, while the remaining portion is positioned in the first lower through-hole b. Furthermore, a first groove for retaining the first sensing antenna 305 is formed on both the first upper support member b308 and the first lower support member b309.

[0064] Furthermore, a second upper support member a313 and a second lower support member a314 are provided on the second column a310. A portion of the second upper support member a313 is fixed to the second upper end a, while the remaining portion is positioned in the second upper through-hole a. A portion of the second lower support member a314 is fixed to the second lower end a, while the remaining portion is positioned in the second lower through-hole a. Furthermore, a second groove is formed on both the second upper support member a313 and the second lower support member a314 for retaining the second sensing antenna 312.

[0065] Furthermore, a second upper support member b and a second lower support member b315 are provided on the second pillar b311. A portion of the second upper support member b is fixed to the second upper end b, while the remaining portion is positioned in the second upper through-hole b. A portion of the second lower support member b315 is fixed to the second lower end b, while the remaining portion is positioned in the second lower through-hole b. Furthermore, a second groove for retaining the second sensing antenna 312 is formed on both the second upper support member b and the second lower support member b315.

[0066] By arranging the first upper support member a306, the first lower support member a307, the first upper support member b308, the first lower support member b309, the second upper support member a313, the second lower support member a314, the second upper support member b, and the second lower support member b315, the first sensing antenna 305 and the second sensing antenna 312 are spaced apart from the first column a303, the first column b304, the second column a310, and the second column b311, respectively, to avoid the first sensing antenna 305 from affecting the collection of magnetic field signals after contacting the first column a303 and the first column b304, and to avoid the second sensing antenna 312 from affecting the collection of magnetic field signals after contacting the second column a310 and the second column b311.

[0067] When the first sensing antenna 305 is placed in the first groove, it is easy to clamp and position the first sensing antenna 305 on the first column a303 and the first column b304. When the second sensing antenna 312 is placed in the second groove, it is easy to clamp and position the second sensing antenna 312 on the second column a310 and the second column b311.

[0068] In this embodiment, the circuit board 316 is solidified with a first interface a, a first interface b, a second interface a, a second interface b, a first connecting column a, a first connecting column b, a second connecting column a and a second connecting column b, wherein the first interface a and the first interface b are connected to the first connecting column a and the first connecting column b respectively, and the second interface a and the second interface b are connected to the second connecting column a and the second connecting column b respectively.

[0069] In one embodiment, the first ends of the first connecting pillar a, the first connecting pillar b, the second connecting pillar a and the second connecting pillar b are solidified on the circuit board 316 , and the second ends of the connecting pillars are wiring terminals and face toward the top plate 301 .

[0070] In another embodiment, a plurality of wire threading holes are opened on the base plate 302, and the first ends of the first connecting column a, the first connecting column b, the second connecting column a and the second connecting column b are solidified on the circuit board 316, and the second end of each connecting column is a wiring terminal, and the second end of each connecting column corresponds to the adjacent wire threading hole.

[0071] In this embodiment, the first sensing antenna 305 is connected to an external first processor via the first interface a and the first connecting post a, the first interface b and the first connecting post b, and the first transmission line, so that the first magnetic field signal obtained by the first sensing antenna 305 is input into the first processor. The second sensing antenna 312 is connected to an external second processor via the second interface a and the second connecting post a, the second interface b and the second connecting post b, and the second transmission line, so that the second magnetic field signal obtained by the second sensing antenna 312 is input into the second processor.

[0072] Specifically, the first end of the first sensing antenna 305 passes through the first lower through hole a and is placed in the first interface a. The second end of the first sensing antenna 305 extends along the first lower support member a307, the outer wall of the first column a303, the first upper support member a306, the first upper through hole a, the distance between the first column a303 and the first column b304, the first upper support member b308, the first upper through hole b, the outer wall of the first column b304, the first lower support member b309, and the first lower through hole b to the position of the first interface b and is placed in the first interface b. The first end of the second sensing antenna 312 passes through the second lower through hole a and is placed in the second interface a. The second end of the second sensing antenna 312 extends along the second lower support member a314, the outer wall of the second column a310, the second upper support member a313, the second upper through hole a, the distance between the second column a310 and the second column b311, the second upper support member b, the second upper through hole b, the outer wall of the second column b311, the second lower support member b315, and the second lower through hole b to the position of the second interface b and is placed in the second interface b.

[0073] Preferably, both the first sensing antenna 305 and the second sensing antenna 312 employ a strip-shaped structure. By employing the aforementioned arrangement, the first sensing antenna 305 and the second sensing antenna 312 form a ring-shaped structure. Compared to the prior art method of simply wrapping a conductive coil around the first pillar a303, the first pillar b304, the second pillar a310, and the second pillar b311, this simplifies the installation of the first sensing antenna 305 and the second sensing antenna 312. The sensitivity of the first sensing antenna 305 and the second sensing antenna 312 can be adjusted later using a control unit and related programs, thereby increasing the sensitivity of collecting magnetic field signals.

[0074] In addition, in this embodiment, the first orthogonal induction antenna is an east-west antenna, which mainly senses magnetic field signals in the east-west direction, and the second orthogonal induction antenna is a north-south antenna, which mainly senses magnetic field signals in the north-south direction.

[0075] Furthermore, in this embodiment, to protect the first sensing antenna 305, the second sensing antenna 312, and the circuit board 316 from damage, protective plates are installed on at least the top of the base plate 302, the outer wall of the first column a 303, the outer wall of the first column b 304, the outer wall of the first column a 303, and the outer wall of the first column b 304. The protective plates can be made of a conductive material or a material containing a conductive substance, so that the first sensing antenna 305 and the second sensing antenna 312 can still detect the magnetic field signal emitted by the lightning signal simulation device through the protective plates.

[0076] Furthermore, a notch 201 is formed on the electric field antenna 2, and one end of the third transmission line is connected to the external third processor through the notch 201, the outer wall surface of the first column a303 and the area between the protective plate.

[0077] like Figure 3 As shown, the present invention provides an azimuth calibration method for an orthogonal magnetic loop antenna, comprising the following steps:

[0078] S1. After the orthogonal magnetic loop antenna is rotated to the current detection position, the electric field antenna and the magnetic field antenna assembly collect the magnetic field signal released outward by the lightning signal simulation device and obtain the current detection position of the orthogonal magnetic loop antenna;

[0079] S2. Calling the preset calibration azimuth when the orthogonal magnetic loop antenna is at the current detection position;

[0080] S3. Obtaining the current azimuth angle of the magnetic field antenna assembly when it is at the current detection position;

[0081] S4. Compare the current azimuth angle with the calibration azimuth angle. If it is determined that the current azimuth angle is inconsistent with the calibration azimuth angle, adjust the current azimuth angle to be consistent with the calibration azimuth angle.

[0082] Example 1

[0083] like Figure 4 As shown, this embodiment provides an azimuth calibration method for an orthogonal magnetic loop antenna, comprising the following steps:

[0084] S100: After the orthogonal magnetic loop antenna is rotated to the current detection position, the electric field antenna and the magnetic field antenna assembly collect the magnetic field signal released outward by the lightning signal simulation device, and obtain the current detection position of the orthogonal magnetic loop antenna.

[0085] Specifically, after the orthogonal magnetic loop antenna is placed on the rotatable tray, the orthogonal magnetic loop antenna is located above the dial. The orthogonal magnetic loop antenna is horizontally rotated to the specified current detection position through the pointer on the tray. At this time, the current detection position can be manually input or automatically input into the external control part through the acquisition device.

[0086] The lightning signal simulator generates and releases a set magnetic field signal based on input from the control unit. Because the rotating assembly is fixed inside the lightning signal simulator, when the lightning signal simulator releases the set magnetic field signal, the electric field antenna and magnetic field antenna assembly collect the magnetic field signal released by the lightning signal simulator.

[0087] S101: Calling a preset calibration azimuth when the orthogonal magnetic loop antenna is at a current detection position.

[0088] Specifically, after receiving the input current detection position, the control part calls the preset calibration azimuth angle θ' corresponding to the current detection position stored in the fourth processor according to the current detection position of the orthogonal magnetic loop antenna.

[0089] S102: Obtain a first magnetic field signal value and a second magnetic field signal value.

[0090] Specifically, the magnetic field antenna assembly includes a first orthogonal induction antenna, a second orthogonal induction antenna and a circuit board. The first orthogonal induction antenna is connected to the first processor in the control part through the circuit board and the first transmission line in sequence, and the second orthogonal induction antenna is connected to the second processor in the control part through the circuit board and the second transmission line in sequence.

[0091] After the first processor and the second processor receive the first magnetic field signal and the second magnetic field signal respectively, the fourth processor uses the existing magnetic field signal value calculation algorithm to obtain the first magnetic field signal value E respectively. X and the second magnetic field signal value E Y The present patent application does not limit the existing magnetic field signal value calculation algorithm.

[0092] S103: Obtain the current azimuth angle of the magnetic field antenna assembly when it is at the current detection position.

[0093] Specifically, the control part includes a fourth processor, which obtains the first magnetic field signal value E X and the second magnetic field signal value E Y Then, the current azimuth angle θ is obtained using the following formula:

[0094]

[0095] S104: Compare the current azimuth angle with the calibration azimuth angle. If it is determined that the current azimuth angle is inconsistent with the calibration azimuth angle, adjust the current azimuth angle to be consistent with the calibration azimuth angle.

[0096] Specifically, if it is determined that the current azimuth angle θ is inconsistent with the calibration azimuth angle θ′, the current azimuth angle is adjusted to be consistent with the calibration azimuth angle, including but not limited to the following two situations.

[0097] Case 1:

[0098] S1041, determining whether the current detection position of the orthogonal magnetic loop antenna and the calibration azimuth angle θ' corresponding to the current detection position obtained by the control part are accurate; if so, executing step S1042; if not, adjusting them to be accurate;

[0099] S1042. Adjust relevant detection parameters according to the difference between the current azimuth angle θ and the calibration azimuth angle θ′ (for example, including but not limited to increasing the sensitivity and accuracy of the magnetic field signal collected by the first sensing antenna and / or the second sensing antenna, etc.);

[0100] S1043. The magnetic field antenna assembly receives the magnetic field signal again, and after obtaining the current first magnetic field signal value and the current second magnetic field signal value, compares the current first magnetic field signal value with the previous first magnetic field signal value, and the current second magnetic field signal value with the previous second magnetic field signal value. If it is determined that the current first magnetic field signal value and the previous first magnetic field signal value, and the current second magnetic field signal value and the previous second magnetic field signal value are the same, repeat the above steps until it is determined that at least one of the current first magnetic field signal value and the previous first magnetic field signal value, or the current second magnetic field signal value and the previous second magnetic field signal value, is different.

[0101] If it is determined that there is a difference between the current first magnetic field signal value and the previous first magnetic field signal value, or between the current second magnetic field signal value and the previous second magnetic field signal value, the current azimuth angle θ is obtained based on the current first magnetic field signal value and the current second magnetic field signal value, and the current azimuth angle θ is compared with the calibrated azimuth angle θ`. If it is determined that the two are different, the above steps are repeated until the current azimuth angle θ is adjusted to be consistent with the calibrated azimuth angle θ`.

[0102] Case 2:

[0103] S1041', replacing the corresponding first sensing antenna and / or second sensing antenna according to the difference between the current azimuth angle θ and the calibration azimuth angle θ';

[0104] S1042`, adjusting the current detection position of the replaced orthogonal magnetic loop antenna to the previous detection position, and after ensuring that the current detection position is the same as the previous detection position, obtaining the current detection position and the corresponding calibration azimuth angle θ`;

[0105] S1043: Determine whether the current detection position of the orthogonal magnetic loop antenna and the calibration azimuth angle θ' corresponding to the current detection position obtained by the control part are accurate. If so, execute step S1042; if not, adjust to be accurate;

[0106] S1044`, the magnetic field antenna component receives the magnetic field signal again, and after obtaining the current first magnetic field signal value and the current second magnetic field signal value, compares the current first magnetic field signal value with the previous first magnetic field signal value, and the current second magnetic field signal value with the previous second magnetic field signal value; if it is determined that the current first magnetic field signal value and the previous first magnetic field signal value, and the current second magnetic field signal value and the previous second magnetic field signal value are the same, repeat the above steps until it is determined that at least one of the current first magnetic field signal value and the previous first magnetic field signal value, or the current second magnetic field signal value and the previous second magnetic field signal value, is different;

[0107] If it is determined that there is a difference between the current first magnetic field signal value and the previous first magnetic field signal value, or between the current second magnetic field signal value and the previous second magnetic field signal value, the current azimuth angle θ is obtained based on the current first magnetic field signal value and the current second magnetic field signal value, and the current azimuth angle θ is compared with the calibrated azimuth angle θ`. If it is determined that the two are different, the above steps are repeated until the current azimuth angle θ is adjusted to be consistent with the calibrated azimuth angle θ`.

[0108] Example 2

[0109] like Figure 5 As shown, this embodiment provides an azimuth calibration method for an orthogonal magnetic loop antenna, comprising the following steps:

[0110] S200: After the orthogonal magnetic loop antenna is rotated to the current detection position, the electric field antenna and the magnetic field antenna assembly collect the magnetic field signal released outward by the lightning signal simulation device, and obtain the current detection position of the orthogonal magnetic loop antenna.

[0111] Specifically, after the orthogonal magnetic loop antenna is placed on the rotatable tray, the orthogonal magnetic loop antenna is located above the dial. The orthogonal magnetic loop antenna is horizontally rotated to the specified current detection position through the pointer on the tray. At this time, the current detection position can be manually input or automatically input into the external control part through the acquisition device.

[0112] The lightning signal simulator generates and releases a set magnetic field signal based on input from the control unit. Because the rotating assembly is fixed inside the lightning signal simulator, when the lightning signal simulator releases the set magnetic field signal, the electric field antenna and magnetic field antenna assembly collect the magnetic field signal released by the lightning signal simulator.

[0113] S201. Obtain a third magnetic field signal value.

[0114] Specifically, the electric field antenna assembly is connected to the third processor in the control part through the third transmission line. After receiving the third magnetic field signal, the third processor can use the existing magnetic field signal value calculation algorithm to obtain the third magnetic field signal value E ZThe present patent application does not limit the existing magnetic field signal value calculation algorithm.

[0115] S202: Calling a preset calibration magnetic field signal value.

[0116] Specifically, after receiving the input current detection position, the control part calls the preset calibration magnetic field signal value E corresponding to the current detection position stored in the fourth processor according to the current detection position of the orthogonal magnetic loop antenna. Z` .

[0117] S203: Call the calibration azimuth corresponding to the current detection position pre-stored in the fourth processor.

[0118] Specifically, for the third magnetic field signal value E Z and the calibration magnetic field signal value E Z` Compare and if the third magnetic field signal value E Z Greater than the calibration magnetic field signal value E Z` , then call the calibration azimuth θ' corresponding to the current detection position pre-stored in the fourth processor; if it is determined that the third magnetic field signal value E Z Not greater than the calibration magnetic field signal value E Z` , then return to step S200.

[0119] S204 , obtaining a first magnetic field signal value and a second magnetic field signal value.

[0120] Specifically, the magnetic field antenna assembly includes a first orthogonal induction antenna, a second orthogonal induction antenna and a circuit board. The first orthogonal induction antenna is connected to the first processor in the control part through the circuit board and the first transmission line in sequence, and the second orthogonal induction antenna is connected to the second processor in the control part through the circuit board and the second transmission line in sequence.

[0121] After the first processor and the second processor obtain the first magnetic field signal and the second magnetic field signal respectively, the fourth processor uses the existing magnetic field signal value calculation algorithm to obtain the first magnetic field signal value E respectively. X and the second magnetic field signal value E Y The present patent application does not limit the existing magnetic field signal value calculation algorithm.

[0122] S205: Obtain the current azimuth angle of the magnetic field antenna assembly when it is at the current detection position.

[0123] Specifically, the fourth processor obtains the first magnetic field signal value E X and the second magnetic field signal value E Y Then, the current azimuth angle θ is obtained using the following formula:

[0124]

[0125] S206: Compare the current azimuth angle with the calibration azimuth angle. If it is determined that the current azimuth angle is inconsistent with the calibration azimuth angle, adjust the current azimuth angle θ to be consistent with the calibration azimuth angle θ′.

[0126] Specifically, if it is determined that the current azimuth angle is inconsistent with the calibrated azimuth angle, the current azimuth angle θ is adjusted to be consistent with the calibrated azimuth angle θ′, including but not limited to the following two cases.

[0127] Among them, the implementation steps of situation one are the same as the implementation steps S1041 to S1043 recorded in embodiment one, and the implementation steps of situation two are the same as the implementation steps S1041' to S1044' recorded in embodiment one.

[0128] The present invention provides a calibration device for implementing Figure 3 The calibration method described in, which includes:

[0129] Lightning signal simulation equipment generates and releases a set magnetic field signal according to input instructions;

[0130] The rotating component is fixed inside the lightning signal simulation device and rotates the orthogonal magnetic loop antenna to the current detection position;

[0131] An orthogonal magnetic loop antenna is fixed to the rotating assembly and includes an electric field antenna and a magnetic field antenna assembly. The electric field antenna is fixed to the top end surface of the magnetic field antenna assembly. The electric field antenna and the magnetic field antenna assembly collect magnetic field signals released outward by the lightning signal simulation device.

[0132] a processor, configured to obtain at least a first magnetic field signal value, a second magnetic field signal value, a preset calibration azimuth corresponding to a current detection position, and a preset calibration magnetic field signal value;

[0133] Obtaining a current azimuth angle according to the first magnetic field signal value and the second magnetic field signal value;

[0134] The current azimuth angle is compared with the calibration azimuth angle. If it is determined that the current azimuth angle is inconsistent with the calibration azimuth angle, the current azimuth angle is adjusted to be consistent with the calibration azimuth angle.

[0135] Example 3

[0136] like Figure 6 As shown, this embodiment provides a calibration device for implementing Figure 4 The calibration method described in the invention includes a lightning signal simulation device 1, a rotating component 4, an orthogonal magnetic loop antenna 5 and a processor.

[0137] In this embodiment, the lightning signal simulation device 1 may adopt, but is not limited to, a Helmholtz coil.

[0138] Preferably, when the lightning signal simulation device 1 uses a Helmholtz coil, it generates and releases a set magnetic field signal according to an input instruction of the control part.

[0139] In this embodiment, the structure of the orthogonal magnetic loop antenna 5 is the same as the structure of the orthogonal magnetic loop antenna 5 described in the first embodiment.

[0140] In this embodiment, the rotating assembly 4 includes a rotating mechanism, a dial 403, a tray 404 and a pointer 405, wherein the bottom of the rotating mechanism is fixed to the Helmholtz coil, the dial 403 is fixed to the rotating mechanism, the tray 404 is rotatably connected to the rotating mechanism and is arranged on the dial 403, the pointer 405 is fixed on the tray 404, and its bottom end is adjacent to the dial 403, and the orthogonal magnetic ring antenna 5 is fixed on the tray 404.

[0141] Furthermore, the rotating mechanism includes a bottom fixing member 401 and a rotating shaft assembly 402 mounted on the bottom fixing member 401. A scale plate 403 is sleeved and fixed to the outside of the rotating shaft assembly 402. A tray 404 is fixed to the top of the rotating shaft assembly 402. A pointer 405 is fixed to the outer wall of the tray 404. Because the diameter of the tray 404 is smaller than the diameter of the scale plate 403, it is easy to check the position indicated by the pointer 405, thereby understanding the current position of the orthogonal magnetic loop antenna 5.

[0142] In this embodiment, the processor includes a first processor, a second processor, and a fourth processor, wherein the first processor receives a first magnetic field signal and obtains a first magnetic field signal value according to the first magnetic field signal.

[0143] The second processor receives the second magnetic field signal and obtains a second magnetic field signal value based on the second magnetic field signal. The fourth processor stores a preset calibration azimuth and a preset calibration magnetic field signal value corresponding to the current detection position, obtains a current azimuth based on the first magnetic field signal value and the second magnetic field signal value, compares the current azimuth with the calibration azimuth, and adjusts the current azimuth to be consistent with the calibration azimuth if it is determined that the current azimuth is inconsistent with the calibration azimuth.

[0144] Specifically, after the first processor and the second processor obtain the first magnetic field signal and the second magnetic field signal respectively, they can use the existing magnetic field signal value calculation algorithm to obtain the first magnetic field signal value E respectively. X and the second magnetic field signal value E Y .

[0145] The fourth processor obtains the first magnetic field signal value E X and the second magnetic field signal value E Y Then, the current azimuth angle θ is obtained using the following formula:

[0146]

[0147] Furthermore, after obtaining the current detection position of the orthogonal magnetic ring antenna 5 on the rotating component 4, the fourth processor obtains the corresponding preset calibration azimuth angle θ` based on the current detection position, and compares the current azimuth angle θ with the calibration azimuth angle θ`. If it is determined that the current azimuth angle θ is inconsistent with the calibration azimuth angle θ`, the current azimuth angle θ is adjusted to be consistent with the calibration azimuth angle θ`.

[0148] Exemplarily, if it is determined that the current azimuth angle is inconsistent with the calibrated azimuth angle, the current azimuth angle is adjusted to be consistent with the calibrated azimuth angle, including but not limited to the following two situations.

[0149] Among them, the implementation steps of situation one are the same as the implementation steps S1041 to S1043 recorded in embodiment one, and the implementation steps of situation two are the same as the implementation steps S1041' to S1044' recorded in embodiment one.

[0150] This embodiment also includes a control unit. This unit is connected to the lightning signal simulation device 1 and controls the lightning signal simulation device 1 to generate and release a set magnetic field signal based on input instructions. A processor is located within the control unit. The electric field antenna 2 and the magnetic field antenna assembly 3 are each connected to the control unit via transmission lines, thereby connecting the electric field antenna 2 and the magnetic field antenna assembly 3 to the processor. Furthermore, the current detection position of the orthogonal magnetic loop antenna 5 after rotation can be manually input into the control unit or automatically input via an acquisition device.

[0151] In this embodiment, the processor is preferably a circuit board on which the first processor, the second processor, and the fourth processor are solidified.

[0152] Example 5

[0153] This embodiment provides a calibration device for implementing Figure 5 The calibration method described in the preceding embodiment differs from the calibration device in the following aspects:

[0154] The processor also includes a third processor, which is connected to the electric field antenna component through a third transmission line, receives the third magnetic field signal collected by the electric field antenna, and obtains a third magnetic field signal value.

[0155] The fourth processor stores a preset calibration magnetic field signal value corresponding to the current detection position, compares the third magnetic field signal value with the calibration magnetic field signal value, and if it is determined that the third magnetic field signal value is greater than the calibration magnetic field signal value, compares the current azimuth with the calibration azimuth, and if it is determined that the current azimuth is inconsistent with the calibration azimuth, adjusts the current azimuth to be consistent with the calibration azimuth.

[0156] Furthermore, the third processor receives the third magnetic field signal and obtains a third magnetic field signal value E according to the third magnetic field signal. Z , and the third magnetic field signal value E Z and the calibration magnetic field signal value E Z` Compare. If the third magnetic field signal value E is determined Z Greater than the calibration magnetic field signal value E Z` , then call the calibration azimuth θ` with the current detection position.

[0157] In this embodiment, after the first processor, the second processor, and the third processor obtain the first magnetic field signal, the second magnetic field signal, and the third magnetic field signal respectively, they can use the existing magnetic field signal value calculation algorithm to obtain the first magnetic field signal value E respectively. X , the second magnetic field signal value E Y and the third magnetic field signal value E Z .

[0158] Furthermore, the fourth processor generates a signal according to the first magnetic field signal value E. X and the second magnetic field signal value E Y Obtain the current azimuth angle θ and determine whether the current azimuth angle θ is consistent with the calibration azimuth angle θ'. If the current azimuth angle θ is inconsistent with the calibration azimuth angle θ', adjust the current azimuth angle to be consistent with the calibration azimuth angle.

[0159] Exemplarily, if it is determined that the current azimuth angle is inconsistent with the calibrated azimuth angle, the current azimuth angle is adjusted to be consistent with the calibrated azimuth angle, including but not limited to the following two situations.

[0160] Among them, the implementation steps of situation one are the same as the implementation steps S1041 to S1043 recorded in embodiment one, and the implementation steps of situation two are the same as the implementation steps S1041' to S1044' recorded in embodiment one.

[0161] In this embodiment, the processor is preferably a circuit board on which the first processor, the second processor, the third processor, and the fourth processor are solidified.

[0162] The above description is merely a preferred embodiment of the present invention and is intended to be illustrative rather than restrictive of the present invention. Those skilled in the art will appreciate that many changes, modifications, and even equivalents may be made to the present invention within the spirit and scope of the claims, all of which fall within the scope of protection of the present invention.

Claims

1. An orthogonal magnetic loop antenna for collecting magnetic field signals, comprising a magnetic field antenna assembly and an electric field antenna fixed on top of the magnetic field antenna assembly, characterized in that: The magnetic field antenna assembly includes a top plate, a bottom plate, a first column group, a second column group, a first inductive antenna, a second inductive antenna, and a circuit board, wherein the first inductive antenna and the second inductive antenna both adopt a strip structure, the first column group and the second column group are both connected to the top plate and the bottom plate, the circuit board is fixed to the top end surface of the bottom plate, the first inductive antenna extends along a first path on the first column group and between the top plate and the bottom plate, forming a ring structure surrounding the outside of the circuit board and connected to the circuit board, and the second inductive antenna extends along a second path on the second column group and between the top plate and the bottom plate, forming a ring structure surrounding the outside of the circuit board and connected to the circuit board; The first column group includes a first column a and a first column b, wherein a protective plate is installed on the outer wall of the first column a, and a notch is formed on the electric field antenna. One end of the third transmission line is connected to an external third processor through the notch, the outer wall of the first column a and the area between the protective plate to input the third magnetic field signal into the third processor.

2. The orthogonal magnetic loop antenna according to claim 1, characterized in that: The first sensing antenna is perpendicular to the second sensing antenna, and in an orthographic projection perspective, a portion of the first sensing antenna overlaps a portion of the second sensing antenna.

3. The orthogonal magnetic loop antenna according to claim 1, wherein: The first pillar a and the first pillar b are opposite to each other and spaced apart. The first sensing antenna extends along a first path sequentially through the first pillar a, the space between the first pillar a and the first pillar b, and the first pillar b, and is then connected to both ends of the circuit board. The second column group includes a second column a and a second column b, wherein the second column a and the second column b are opposite to each other and are arranged at intervals. The second sensing antenna extends along the second path in sequence on the second column a, the interval area between the second column a and the second column b, and the second column b, and is then connected to both ends of the circuit board.

4. The orthogonal magnetic loop antenna according to claim 3, characterized in that: A gap is formed between the first sensing antenna and the first pillar a and the first pillar b; A gap is formed between the second sensing antenna and the second pillar a and the second pillar b.

5. The orthogonal magnetic loop antenna according to claim 4, characterized in that: A first upper support member a and a first lower support member a are provided on the first column a, a first upper support member b and a first lower support member b are provided on the first column b, and a portion of the first sensing antenna is placed in the first upper support member a, the first lower support member a, the first upper support member b, and the first lower support member b; A second upper support member a and a second lower support member a are provided on the second column a, a second upper support member b and a second lower support member b are provided on the second column b, and a portion of the second sensing antenna is placed in the second upper support member a, the second lower support member a, the second upper support member b and the second lower support member b.

6. The orthogonal magnetic loop antenna according to claim 5, characterized in that: First grooves are formed in the first upper support member a, the first lower support member a, the first upper support member b, and the first lower support member b, and a portion of the first sensing antenna is placed in each of the first grooves; Second grooves are formed in the second upper support member a, the second lower support member a, the second upper support member b, and the second lower support member b, and a portion of the second sensing antenna is placed in each of the second grooves.

7. The orthogonal magnetic loop antenna according to claim 1, wherein: The circuit board is cured with a first interface a, a first interface b, a second interface a, a second interface b, a first connecting column a, a first connecting column b, a second connecting column a and a second connecting column b, wherein the first interface a and the first interface b are respectively connected to the first connecting column a and the first connecting column b, the second interface a and the second interface b are respectively connected to the second connecting column a and the second connecting column b, the two ends of the first sensing antenna are respectively connected to the first interface a and the first interface b, the two ends of the second sensing antenna are respectively connected to the second interface a and the second interface b, and the first connecting column a and the first connecting column b, as well as the second connecting column a and the second connecting column b, are all connected to the processor via transmission lines.

8. The orthogonal magnetic loop antenna according to claim 1, wherein: A protective plate is further provided on the outer sides of the first column group, the second column group and the circuit board, wherein the protective plate is made of a conductive material or a material containing a conductive substance.

9. The orthogonal magnetic loop antenna according to claim 1, wherein: The electric field antenna is connected to the processor via a transmission line.

10. An azimuth calibration method for calibrating the azimuth of the orthogonal magnetic loop antenna according to any one of claims 1 to 9, characterized in that: The following steps are involved: After the orthogonal magnetic loop antenna is rotated to the current detection position, the electric field antenna and the magnetic field antenna assembly collect the magnetic field signal released outward by the lightning signal simulation device and obtain the current detection position of the orthogonal magnetic loop antenna; Calling the preset calibration azimuth when the orthogonal magnetic loop antenna is in the current detection position; Obtaining the current azimuth angle of the magnetic field antenna assembly when it is at the current detection position; The current azimuth angle is compared with the calibration azimuth angle. If it is determined that the current azimuth angle is inconsistent with the calibration azimuth angle, the current azimuth angle is adjusted to be consistent with the calibration azimuth angle.

11. A calibration device, characterized in that: The method for implementing the azimuth calibration method according to claim 10 comprises: Lightning signal simulation equipment generates and releases a set magnetic field signal according to input instructions; A rotating assembly is fixed inside the lightning signal simulation device and rotates the orthogonal magnetic loop antenna to a current detection position; an orthogonal magnetic loop antenna, fixed to the rotating assembly, comprising an electric field antenna and a magnetic field antenna assembly, wherein the electric field antenna is fixed to the top end surface of the magnetic field antenna assembly, wherein the electric field antenna and the magnetic field antenna assembly each obtain a magnetic field signal; a processor, configured to obtain at least a first magnetic field signal value, a second magnetic field signal value, a preset calibration azimuth corresponding to a current detection position, and a preset calibration magnetic field signal value; Obtaining a current azimuth angle according to the first magnetic field signal value and the second magnetic field signal value; The current azimuth angle is compared with the calibrated azimuth angle. If it is determined that the current azimuth angle is inconsistent with the calibrated azimuth angle, the current azimuth angle is adjusted to be consistent with the calibrated azimuth angle.

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