Bipolar antenna for lightning detection

Abstract

The embodiment of the utility model discloses a bipolar antenna for lightning detection, relates to the field of lightning detection and positioning, and aims to solve the problems that a monopole antenna is high in grounding requirement, weak in anti-interference capability, high in false alarm probability and the like. The amplifier carries out differential amplification on signals of the induction antenna and the reference antenna and then outputs the signals to an analog-to-digital conversion (ADC) circuit; and digital signals output by the ADC are output to a computer or a DSP (Digital Signal Processor) for further processing.

Description

Technical Field

[0001] This application relates to the field of lightning detection and location, and more particularly to a dipole antenna for lightning detection. Background Technology

[0002] Lightning detection and location play a vital role in lightning warning, disaster prevention, and meteorological research, and are gradually gaining importance in various countries. Antennas are the sensors used in lightning detection, forming a crucial hardware foundation and one of the core technologies of lightning detection.

[0003] The antennas typically used for lightning detection are monopole antennas made of a 30-50cm long copper rod. A broadband operational amplifier is used as the preamplifier, followed by a bandpass filter as the preprocessor for the data acquisition system. The principle of a monopole antenna requires ideal grounding; otherwise, noise will be present. However, ideal grounding is difficult to achieve in practice because various conditions are encountered during actual construction, such as mountainous terrain, which can lead to suboptimal grounding, and even very dirty ground (referring to noisy ground).

[0004] Existing monopole antennas suffer from high noise and weak anti-interference capabilities, leading to a high false trigger rate. Besides poor grounding, the monopole antenna operates within an atmospheric electric field, and this approach detects all fluctuations in the atmospheric electric field as lightning signals. Furthermore, the complex zero-pole configuration of multi-stage active filters causes filter instability due to excessive gain, feedback, and nonlinearity, resulting in critical oscillations. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a bipolar antenna for lightning detection, comprising:

[0006] An inductive antenna and a reference antenna are mounted on a support member, with the sensing end of the inductive antenna located above the support member and the sensing end of the reference antenna located below the support member.

[0007] An amplifier is connected to the inductive antenna and the reference antenna via the support member. The amplifier amplifies the signals from the inductive antenna and the reference antenna.

[0008] A conversion circuit is electrically connected to the amplifier, and the conversion circuit converts the amplified signal.

[0009] Optionally, in some embodiments of this application, the support member is a first support pipe and a second support pipe, the first support pipe and the second support pipe are arranged vertically relative to each other and the first support pipe is located at the top of the second support pipe, the induction antenna is connected to the end of the first support pipe away from the second support pipe, and the reference antenna is connected to the end of the second support pipe away from the first support pipe.

[0010] The first support pipe is detachably connected to the sensing antenna, the second support pipe is detachably connected to the reference antenna, and the amplifier is connected to the sensing antenna through the first support pipe and to the reference antenna through the second support pipe.

[0011] Optionally, in some embodiments of this application, the support member is a support base block, the support base block has an accommodating cavity, and the amplifier is disposed in the accommodating cavity;

[0012] A first docking member is provided on the support base block at the position corresponding to the position of the sensing antenna and the reference antenna. A second docking block is provided on the sensing antenna and the reference antenna at the position corresponding to the position of the first docking member. The first docking member and the second docking member are connected to the sensing antenna and the reference antenna to connect with the support base block.

[0013] The first docking member is electrically connected to the second docking member, and the first docking member is electrically connected to the amplifier, so that both the inductive antenna and the reference antenna are connected to the amplifier;

[0014] The support base is also provided with a third docking member, which is connected to a hollow bracket. The hollow bracket is connected to the accommodating cavity, so that the amplifier is connected to the conversion circuit through the hollow bracket.

[0015] Optionally, in some embodiments of this application, the first mating member is a mating groove with a threaded inner ring, and the second mating member is a mating block with a threaded upper ring, the radius of the mating block being equal to the radius of the mating groove.

[0016] The third docking component is a fixing groove, which fixes the hollow support.

[0017] Optionally, in some embodiments of this application, the support member is a support column, the support column having a sensing area and a reference area, the sensing area having a sensing antenna, the reference area having a reference antenna, and the support column having an amplifier circuit board connected to the sensing antenna and the reference antenna.

[0018] Optionally, in some embodiments of this application, a plurality of sensing antennas are provided in the sensing area, and a plurality of test antennas are provided in the reference area.

[0019] Optionally, in some embodiments of this application, a voltage follower is further included, the voltage follower being located between the amplifier and the conversion circuit, and the voltage follower being electrically connected to both the amplifier and the conversion circuit.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] In this embodiment, by setting up an induction antenna and a reference antenna, the lightning detection is amplified by an amplifier. Compared with only one induction antenna, this avoids the problems of high grounding requirements, weak anti-interference ability, and high false alarm probability of a single antenna. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the bipolar antenna provided in the first embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the overall structure of the bipolar antenna provided in the second embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the overall structure of the bipolar antenna provided in the third embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the circuit structure of a bipolar antenna provided in an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100, Induction antenna; 200, Reference antenna; 300, Amplifier; 310, Amplifier circuit board; 400, Conversion circuit; 500, Support component; 510, First support pipe; 520, Second support pipe; 530, Support block; 531, Receiving cavity; 532, First docking component; 533, Third docking component; 540, Support column; 541, Induction area; 542, Reference area; 600, Second docking component; 700, Hollow bracket. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application. It is understood that the accompanying drawings are provided for reference and illustration only, and are not intended to limit this application. The connection relationships shown in the accompanying drawings are only for clear description and do not limit the connection method.

[0030] Specifically, this application embodiment provides a bipolar antenna for lightning detection. This bipolar antenna primarily utilizes two devices—an inductive antenna 100 and a reference antenna 200—for integrated detection. Specifically:

[0031] The sensing antenna 100 and the reference antenna 200 are mounted on the support member 500. The sensing end of the sensing antenna 100 is positioned at the top of the support member 500 and faces the sky, while the sensing end of the reference antenna 200 is positioned at the bottom of the support member 500 and faces the ground.

[0032] In this application, the direction of the reference antenna 200 can be preferably selected as any position on the support 500 facing the ground. Furthermore, without affecting the test results, the setting direction of the reference antenna 200 can be multiple directions, not limited to the direction facing the ground.

[0033] In this embodiment, an amplifier 300 is also provided. The amplifier 300 is connected to the induction antenna 100 and the reference antenna 200, so that the signals from the induction antenna 100 and the reference antenna 200 are transmitted to the amplifier 300. Through the signal amplification function of the amplifier 300, a very high common-mode interference rejection ratio can be achieved. In this embodiment, the amplifier 300 is a differential amplifier with an amplification ratio of 10, which can amplify the signal proportionally to better observe and detect the signal strength.

[0034] In the above, the amplifier's 300 amplification factor can be adjusted according to the actual situation.

[0035] The amplified signal can be directly transmitted to the dual-ended differential analog-to-digital converter (ADC) 400, which converts the analog signal into a digital signal for easy observation.

[0036] Based on the above structure, this application provides three embodiments.

[0037] First embodiment:

[0038] like Figure 1 As shown, the support member 500 includes a first support pipe 510 and a second support pipe 520. Both the first support pipe 510 and the second support pipe 520 are vertically arranged relative to the ground, and the first support pipe 510 is located above the second support pipe 520. The first support pipe 510 and the second support pipe 520 are arranged separately. An induction antenna 100 is arranged at one end of the first support pipe 510 away from the second support pipe 520, and a reference antenna 200 is arranged at one end of the second support pipe 520 away from the first support pipe 510. The first support pipe 510 is located at the top of the second support pipe 520.

[0039] In this structure, the first support pipe 510 and the induction antenna 100 are detachably connected by threads. The first support pipe 510 is a copper pipe with a diameter of 12mm, a length of 50cm, and a wall thickness of 3mm. An external thread is drilled at one end of the copper pipe and a 10mm nut is fitted to fix the induction antenna 100.

[0040] Similarly, the second support pipe 520 is used to fix the reference antenna 200 using the same materials and methods.

[0041] Meanwhile, during the connection between the first support pipe 510 and the induction antenna 100, and during the connection between the second support pipe 520 and the reference antenna 200, the connection points are isolated and fixed with insulating materials to avoid the first support pipe 510 and the second support pipe 520 affecting the antenna detection.

[0042] Furthermore, the induction antenna 100 is connected to the amplifier 300 through the first support conduit 510, and the reference antenna 200 is connected to the amplifier 300 through the second support conduit 520.

[0043] Second embodiment:

[0044] like Figure 2 As shown, the support member 500 is configured as a support base block 530, and the support base block 530 has an accommodating cavity 531 inside. An amplifier 300 is installed in the accommodating cavity 531. In this structure, the amplifier 300 is a preamplifier to achieve the effect of preamplification.

[0045] On the support base 530, a first mating member 532 is provided at the position corresponding to the sensing antenna 100 and the reference antenna 200. A second mating member 600 is provided on the sensing antenna 100 at the position corresponding to the first mating member 532, and a second mating member 600 is provided on the reference antenna 200 at the position corresponding to the first mating member 532, so that the sensing antenna 100 and the reference antenna 200 are both mounted on the support base 530 through the mating of the first mating member 532 and the second mating member 600.

[0046] In this embodiment, the first docking member 532 is a docking groove, and the second docking member 600 is a docking block. The docking groove and the outer ring of the docking block are provided with threads, and the radii of the docking groove and the docking block are equal, so that the docking block can be connected to the docking groove.

[0047] In this application, both the mating block and the mating groove are electrically connected to the amplifier 300, so that both the induction antenna 100 and the reference antenna 200 are connected to the amplifier 300.

[0048] The aforementioned support base 530 is also provided with a third docking member 533, which is electrically connected to the amplifier 300. A hollow bracket 700 is connected to the third docking member 533. The hollow bracket 700 is installed on the support base 530 through the third docking member 533, and the hollow bracket 700 is connected to the accommodating cavity 531, so that the amplifier 300 in the accommodating cavity 531 is connected to the conversion circuit 400 through the hollow bracket 700.

[0049] In this embodiment, the third docking member 533 is a fixing groove, and the hollow bracket 700 is connected to the support base block 530 through the fixing groove.

[0050] Third embodiment:

[0051] like Figure 3 As shown, the support member 500 is configured as a support column 540, which is cylindrical in shape. A sensing area 541 and a reference area 542 are provided at both ends inside the support column 540. The interior is divided by a partition to separate the sensing area 541 and the reference area 542, so as to avoid the sensing antenna 100 and the reference antenna 200 from interfering with each other.

[0052] In the third embodiment of this application, preferably, the sensing module and the reference module can also be directly installed on the support 500. The sensing module is provided with a sensing antenna 100, and the reference module is provided with a reference antenna 200, so as to achieve the effect of separation.

[0053] In the sensing area 541, multiple sensing antennas 100 are provided, and the multiple sensing antennas 100 are arranged in parallel with each other. In this embodiment of the application, in order to improve the detection effect, two sensing antennas 100 are provided, and the two sensing antennas 100 are arranged in parallel with each other. Correspondingly, multiple reference antennas 200 are provided, and the multiple reference antennas 200 are arranged in parallel with each other. In this embodiment of the application, two reference antennas 200 are provided, and the two reference antennas 200 are arranged in parallel with each other.

[0054] Specifically, the sensing area 541 and the reference area 542 may each be equipped with only one sensing antenna 100 and one reference antenna 200.

[0055] Based on the above structure, the third embodiment of this application also provides an amplifier circuit board 310. The amplifier circuit board 310 is located inside the support column 540 and functions as an amplifier 300 to amplify and enhance the signal.

[0056] A differential preamplifier 300 is provided on the amplifier circuit board 310.

[0057] A hollow bracket 700 is also provided on the support column 540. The hollow bracket 700 is connected to the support column 540 in the same way as the hollow bracket 700 in the second embodiment, and will not be described in detail here.

[0058] In summary, based on the first, second, and third embodiments described above, as follows: Figure 4 As shown, the structure of this application also includes a voltage follower U2-8, which is located between amplifier 300 and conversion circuit 400. This voltage follower is used for impedance matching with the subsequent circuit. In this figure, terminal A is connected to inductive antenna 100, terminal B is connected to reference antenna 200, operational amplifier U2-A is used for differential amplification and has a high common-mode interference rejection ratio, and U2-B is a voltage follower used for impedance matching with the subsequent circuit.

[0059] The above embodiments are only used to illustrate the technical methods of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of this utility model without departing from the spirit and scope of the technical methods of this utility model.

Claims

1. A dipole antenna for lightning detection, characterized by: An inductive antenna and a reference antenna are mounted on a support member, with the sensing end of the inductive antenna located above the support member and the sensing end of the reference antenna located below the support member. An amplifier is connected to the inductive antenna and the reference antenna via the support member. The amplifier differentially amplifies the signals from the inductive antenna and the reference antenna. A conversion circuit is electrically connected to the amplifier, and the conversion circuit converts the amplified signal.

2. A dipole antenna for lightning detection according to claim 1, characterized in that, The support components are a first support pipe and a second support pipe. The first support pipe and the second support pipe are vertically arranged relative to each other, and the first support pipe is located at the top of the second support pipe. The induction antenna is connected to the end of the first support pipe away from the second support pipe, and the reference antenna is connected to the end of the second support pipe away from the first support pipe. The first support pipe is detachably connected to the sensing antenna, the second support pipe is detachably connected to the reference antenna, and the amplifier is connected to the sensing antenna through the first support pipe and to the reference antenna through the second support pipe.

3. A dipole antenna for lightning detection according to claim 1, characterized in that, The support is a support block, the support block has a receiving cavity, and the amplifier is disposed in the receiving cavity; A first docking member is provided on the support base block at the position corresponding to the position of the sensing antenna and the reference antenna. A second docking member is provided on the sensing antenna and the reference antenna at the position corresponding to the position of the first docking member. The first docking member and the second docking member are connected to the sensing antenna and the reference antenna to connect to the support base block. The first docking member is electrically connected to the second docking member, and the first docking member is electrically connected to the amplifier, so that both the inductive antenna and the reference antenna are connected to the amplifier; The support base is also provided with a third docking member, which is connected to a hollow bracket. The hollow bracket is connected to the accommodating cavity, so that the amplifier is connected to the conversion circuit through the hollow bracket.

4. A dipole antenna for lightning detection according to claim 3, characterized in that, The first docking component is a docking groove with a threaded inner ring; the second docking component is a docking block with a threaded upper ring and the radius of the docking block is equal to the radius of the docking groove. The third docking component is a fixing groove, which fixes the hollow support.

5. A dipole antenna for lightning detection according to claim 1, characterized in that, The support is a support column, which has a sensing area and a reference area. An induction antenna is installed in the sensing area, and a reference antenna is installed in the reference area. An amplifier circuit board is installed in the support column, and the amplifier circuit board is connected to the induction antenna and the reference antenna.

6. A dipole antenna for lightning detection according to claim 5, characterized in that, Multiple sensing antennas are provided in the sensing area, and multiple test antennas are provided in the reference area.

7. A dipole antenna for lightning detection according to claim 1, characterized in that, It also includes a voltage follower located between the amplifier and the conversion circuit, and the voltage follower is electrically connected to both the amplifier and the conversion circuit.

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