Lightning locator based on mobile platform

Abstract

The utility model discloses a lightning positioning instrument based on a mobile platform, which relates to the technical field of lightning monitoring and positioning, and comprises a lightning signal acquisition module, an attitude measurement module and a positioning module, the lightning signal acquisition module is used for acquiring electromagnetic wave signals of lightning; the attitude measurement module is configured to detect the attitude change of the lightning signal acquisition module; the positioning module is used for positioning the geographical position information of the lightning locator. According to the utility model, the attitude measurement module detects the attitude change of the lightning signal acquisition module; the geographic position information of the lightning position indicator is positioned through the positioning module, the central station can calculate the lightning position and the lightning current according to the electromagnetic wave signal information, the geographic position information and the posture change information, and the problems that in the prior art, a lightning positioning system is fixed in position and poor in flexibility are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lightning monitoring and positioning, in particular to a lightning locator based on a mobile platform. Background Art

[0002] Current lightning location systems employ fixed deployment of lightning locators around the lightning monitoring area. The locations of the lightning locators are measured during deployment. When lightning strikes, the locators detect the arrival time and electromagnetic field strength of the lightning's electromagnetic waves, then transmit this data to a central station via a communications network. The central station receives the detection data and, combined with the location information of each lightning locator, calculates the lightning's location and current.

[0003] However, this traditional lightning location system suffers from fixed positioning and poor flexibility. In some special situations, such as the need to temporarily monitor lightning in a specific area or on mobile platforms or equipment, fixed-position lightning locators cannot quickly and effectively adjust their monitoring range and position. This can lead to suboptimal lightning monitoring and location results and fail to meet practical application requirements. Utility Model Content

[0004] The purpose of the utility model is to provide a lightning locator based on a mobile platform to solve the problems existing in the above-mentioned prior art and improve the flexibility of use.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] The utility model provides a lightning locator based on a mobile platform, comprising:

[0007] Lightning signal acquisition module, used to collect electromagnetic wave signals of lightning;

[0008] a posture measurement module, configured to detect posture changes of the lightning signal acquisition module;

[0009] A positioning module is used to locate the geographical location information of the lightning locator.

[0010] Preferably, it further comprises a wireless communication module, which is used to transmit geographic location information, posture change information and electromagnetic wave signal information to a central station.

[0011] Preferably, the positioning module is a Beidou positioning module.

[0012] Preferably, the model of the posture measurement module is the Xingyi brand ATK-MS901M model produced by Guangzhou Xingyi Electronic Technology Co., Ltd.

[0013] Preferably, the wireless communication module adopts any one of the following:

[0014] The first type is the Hongdian brand 7118C wireless communication module produced by Shenzhen Hongdian Technology Co., Ltd.;

[0015] The second type is the Xingqiao Hengyuan brand SN2P113YX Beidou communication terminal produced by Beijing Xingqiao Hengyuan Navigation Technology Co., Ltd.;

[0016] The third type is the LeSat T2 Tiantong satellite data communication terminal under the LeZhong brand produced by Haining LeZhong Information Technology Co., Ltd.

[0017] Preferably, the lightning signal acquisition module includes an electric field antenna, an east-west magnetic field ring antenna, and a north-south magnetic field ring antenna. The electric field antenna, the east-west magnetic field ring antenna, and the north-south magnetic field ring antenna are all arranged on a bracket. A bottom connecting plate is provided at the bottom of the bracket, and the attitude measurement module is installed on the bottom connecting plate.

[0018] Preferably, it further comprises a shell, a column and a chassis, wherein the column is fixed on the chassis, the shell is arranged on the top of the column, and the lightning signal acquisition module is arranged in the shell.

[0019] The present utility model also provides a lightning network monitoring and early warning device, including a central station and the lightning locator as described above, wherein the lightning locator is used to be installed on a mobile platform, and the lightning locator can transmit the detected information to the central station, and the central station calculates the position and current of the lightning based on the detected information.

[0020] Compared with the prior art, the utility model has achieved the following technical effects:

[0021] The mobile platform-based lightning locator provided by the present invention can be mounted on a mobile platform, and the posture measurement module is used to detect the posture changes of the lightning signal acquisition module; the geographical location information of the lightning locator is located by the positioning module, and the central station can calculate the position of the lightning and the lightning current based on the electromagnetic wave signal information, the geographical location information and the posture change information. Therefore, the present invention solves the problems of the lightning locating system in the prior art that the position is fixed and the flexibility is poor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 The utility model provides a structural schematic diagram of a lightning locator;

[0024] Figure 2 It is a structural diagram of the attitude measurement module;

[0025] Figure 3 This is the principle diagram of lightning location detection using the time difference method;

[0026] In the figure: 1- positioning module; 2- electric field antenna; 3- magnetic field antenna; 4- crystal oscillator; 5- receiving circuit electronics; 6- motherboard socket; 7- mounting tray; 8- interface board; 9- protective tube; 10- power supply box; 11- small square tray; 12- top screw; 13- power board; 14- transformer; 15- column; 16- grounding column; 17- chassis; 18- bottom connection board; 19- lightning signal acquisition module. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the 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.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] Current lightning location systems employ fixed deployment of lightning locators around the lightning monitoring area. The locations of the lightning locators are measured during deployment. When lightning strikes, the locators detect the arrival time and electromagnetic field strength of the lightning's electromagnetic waves, then transmit this data to a central station via a communications network. The central station receives the detection data and, combined with the location information of each lightning locator, calculates the lightning's location and current.

[0030] When a mobile platform is used to implement mobile lightning network positioning, unlike equipment installed in a fixed position, its position is constantly changing. Therefore, when the lightning locator detects a lightning signal, the position information (longitude, latitude and altitude) of the mobile platform at this moment must be recorded at the same time, and this position information and the lightning detection data must be sent to the central station at the same time. The central station calculates the location of the lightning based on the above data sent in real time by the lightning locator.

[0031] Secondly, because the mobile platform is constantly in motion, irregular fluctuations in factors such as road slope and water surface waves prevent the lightning locator from maintaining its antenna perpendicular to the ground. This can lead to errors in the lightning electromagnetic field strength measured by the lightning locator, and in turn, errors in the lightning current. To avoid errors in electromagnetic field strength measurement, it is necessary to obtain the antenna's tilt angle in real time to compensate for the errors caused by the antenna not being perpendicular to the ground.

[0032] Based on this, the utility model provides a lightning locator based on a mobile platform, such as Figure 1 As shown, it includes: a lightning signal acquisition module 19, a posture measurement module and a positioning module 1. The lightning signal acquisition module 19 is used to collect electromagnetic wave signals of lightning; the posture measurement module is configured to detect posture changes of the lightning signal acquisition module 19; and the positioning module 1 is used to locate the geographical location information of the lightning locator.

[0033] The lightning locator provided by the present invention is different from the existing lightning locator in that a posture measurement module and a positioning module 1 are added.

[0034] The lightning locator provided by the present invention can be carried on a mobile platform, such as a car, train, ship or other mobile platform, and detects the posture change of the lightning signal acquisition module 19 through the posture measurement module; the geographical location information of the lightning locator is located by the positioning module 1, and the central station can calculate the position of the lightning and the lightning current based on the electromagnetic wave signal information, the geographical location information and the posture change information. Therefore, the present invention solves the problem of the lightning locating system in the prior art having a fixed position and poor flexibility.

[0035] The lightning signal acquisition module 19 can adopt any one of the existing technologies, as long as it can measure the precise time when the lightning electromagnetic wave reaches the device and the electromagnetic field strength.

[0036] In some embodiments, the present invention further includes a wireless communication module for transmitting geographic location information, attitude change information, and electromagnetic wave signal information to a central station. The central station corrects the electromagnetic wave signal detected by the lightning signal acquisition module 19 based on the attitude change detected by the attitude measurement module. The central station can also determine the location of the lightning based on the location information and the time it takes for the lightning electromagnetic wave to reach the lightning signal acquisition module 19. It will be understood that the central station needs to determine the location based on information transmitted by a group of lightning locators, which may include three or four lightning locators.

[0037] In some embodiments, the lightning signal acquisition module 19 includes an electric field antenna 2, an east-west magnetic field ring antenna, and a north-south magnetic field ring antenna. The east-west magnetic field ring antenna and the north-south magnetic field ring antenna constitute a magnetic field antenna 3. The electric field antenna 2, the east-west magnetic field ring antenna, and the north-south magnetic field ring antenna are all arranged on a bracket. A bottom connecting plate 18 is provided at the bottom of the bracket, and the attitude measurement module is installed on the bottom connecting plate 18.

[0038] To meet the needs of real-time lightning network positioning based on mobile platforms, in some embodiments, the positioning module 1 is a Beidou positioning module, and preferably a high-dynamic Beidou positioning module is used to provide real-time position information of the lightning locator on the mobile platform. The update rate of the position information is not less than 5Hz, for example: UM220 Beidou positioning module. The high-dynamic Beidou positioning module is installed in the electronic compartment of the lightning locator and sends the position data (longitude, latitude and altitude) of the lightning locator to the device data processing CPU in real time through the serial port. The CPU updates the position data in real time and can keep the position error less than 5m.

[0039] After receiving a lightning signal, the Beidou positioning module immediately reads the lightning signal acquisition module's location information. It combines this location data with the lightning electromagnetic wave detection data into a combined lightning data packet and sends it to the central station. The central station obtains the device's exact location from the data packet and combines it with the lightning detection data to determine the lightning's location.

[0040] Main indicators of UM220-INS Beidou positioning module

[0041] Performance indicators Channel 64 channel BDSB1 GPSL1 GLONASSG1 GalileoE1 QZS SBAS Positioning mode: single system independent positioning Power consumption: 90mW Time to First Fix (TTFF) Cold start<28s Hot start<1s Recapture < 1s Positioning accuracy (CEP) plane: 2.0m (dual system) Speed accuracy (RMS) 0.1m / s 1PPS support Sensitivity GNSS Tracking: -161dBm Cold start: -147dBm Hot start: -154dBm Recapture: -157dBm Data update rate: 1Hz / 5Hz / 10Hz Data format NMEA0183 (compatible with Beidou), Unicore

[0042] In some embodiments, the model of the attitude measurement module is ATK-MS901M.

[0043] The attitude measurement module sends the inclination data of the lightning signal acquisition module 19 to the data processing CPU in real time through the serial port, and the data processing CPU transmits the data to the central station through the wireless communication module.

[0044] Attitude measurement module such as Figure 2 shown.

[0045] The east-west magnetic field loop antenna (EW) is in the XOZ plane, and the north-south magnetic field loop antenna (NS) is in the YOZ plane. O is the coordinate origin.

[0046] Vew=Bew*S*cos(α);

[0047] Vns=Bns*S*cos(β);

[0048] Vew is the signal generated by the east-west magnetic field, and Vns is the signal generated by the north-south magnetic field;

[0049] Bew and Bns are the magnetic induction intensities of the east-west magnetic field and the north-south magnetic field respectively:

[0050] α is the angle between the XOZ plane and the vertical ground plane;

[0051] β is the angle between YOZ and the vertical ground plane;

[0052] S is the equivalent area of the loop antenna.

[0053] Vew and Vns are the device hardware measurement outputs, S is the device constant, and α and β are the tilt module outputs. Therefore:

[0054] Bew=Vew / (S*cos(α)); (1)

[0055] Bns=Vns / (S*cos(β)); (2)

[0056] That is, the measurement of the inclination angle can compensate for the magnetic induction intensity measurement error caused by the loop antenna not being perpendicular to the ground.

[0057] When the detector measures the values of the Vew and Vns signals, it immediately reads the inclination data at that moment, and then counts the magnetic induction intensity according to formulas (1) and (2).

[0058] Technical specifications of ATK-MS901 M attitude measurement module

[0059]

[0060] In some embodiments, in order to meet the data transmission requirements of the lightning network positioning device based on the mobile platform, the data transmission of the device must adopt wireless communication.

[0061] Lightning locators installed on land-based mobile platforms such as cars and trains should use 4G / 5G ground wireless communication networks to transmit lightning data.

[0062] The selected communication module is for example: Hongdian 7118C wireless communication module

[0063] Technical indicators:

[0064] 1) Bandwidth 10M;

[0065] 2) Interface type: Ethernet port / RJ45 / FE (10 / 100M port for MSTP circuit within 10M);

[0066] 3)Serial data interface: TTL, RS232 / 485 / 422

[0067] 4)Serial data interface rate: 300~115200bits / s

[0068] 5) LNS provision method: Telecom shared LNS.

[0069] 6) Power consumption: ≤2W

[0070] Lightning locators installed on mobile platforms such as surface ships often exceed the coverage of ground wireless networks when sailing on the sea, making it impossible to transmit lightning data. Satellite (Beidou, Tiantong) communication should be used to transmit data.

[0071] The selected Beidou satellite communication module is for example: Beijing Xingqiao Hengyuan SN2P113YX Beidou communication terminal SN2P113YX Beidou communication terminal technical indicators

[0072]

[0073] Or choose the Tiantong satellite communication module, such as LeSat T2 Tiantong satellite data communication terminal of Lezhong Information

[0074] Technical Specifications of LeSat T2 Tiantong Satellite Data Communication Terminal

[0075] Serial number project Technical indicators Remark 1 Tiantong S satellite frequency band 1980-2010MHz&2170-2200MHz 2 CPU Quad-core A7 3 CPU frequency Main frequency 1.1GHz 4 Memory 1GB RAM; 8GB ROM 5 position GPS / Beidou 6 antenna External omnidirectional satellite antenna 7 Protection level Outdoor antenna IP67 8 Operating temperature -20℃～+50℃ 9 Storage temperature -40℃～+70℃

[0076] In some embodiments, such as Figure 1 As shown, the embodiment of the present invention further includes a housing, a column 15 and a chassis 17 , the column 15 is fixed on the chassis 17 , the housing is arranged on the top of the column 15 , and the lightning signal acquisition module 19 is arranged in the housing.

[0077] The present utility model also provides a lightning network monitoring and early warning device, including a central station and the lightning locator as described above, wherein the lightning locator is used to be installed on a mobile platform, and the lightning locator can transmit the detected information to the central station, and the central station calculates the position and current of the lightning based on the detected information.

[0078] Working principle of lightning network monitoring and early warning equipment:

[0079] It works on the principle of time difference method. When lightning strikes, its huge instantaneous return current generates a strong electromagnetic pulse radiation, which propagates in all directions at the speed of light. The antenna of the lightning locator receives the very low frequency signal of the lightning electromagnetic pulse, and uses the peak position of the signal as the reference point of the signal arrival time, and records the time when the electromagnetic pulse arrives at the receiving point. The magnetic field signal received by the orthogonal ring magnetic field antenna of the lightning locator is processed by the circuit to obtain the east-west magnetic field component Bew and the north-south magnetic field component Bns, which are used for field strength calculation.

[0080] The signal strength is:

[0081]

[0082] Where K is the instrument constant, which can be obtained through calibration.

[0083] When there is an inclination, use

[0084] When the detector measures the values of the Vew and Vns signals, it immediately reads the inclination data at that moment, then counts the magnetic induction intensity according to formulas (1) and (2) in the above embodiment, and then calculates the field strength using formula (3).

[0085] The radiated electric field signal received by the electric field antenna serves as the polarity determination criterion. By performing hyperbolic positioning calculations on lightning data received by three or more lightning locators, the measured lightning strike location can be determined. The magnitude and polarity of the lightning current can also be calculated based on the field strength of the antenna-received signal and the propagation patterns of electromagnetic waves.

[0086] There are three lightning locators R1, R2 and R3. Figure 3 As shown in the figure, a detection network is formed, and the internal clocks of R1, R2, and R3 are synchronized to the same time system. At t0, a lightning strike occurs at L, and the electromagnetic pulse signal radiated by the lightning strike reaches R1, R2, and R3 at t1, t2, and t3 respectively. Then

[0087]

[0088] Where C is the speed of light, and R2L - R1L is the distance difference between stations R1 and R2 to the lightning strike point. If the lightning strike point is known, then t2 - t1 is also a fixed value. Conversely, if t2 - t1 is measured, the lightning strike point must lie on a hyperbola AB with an equal distance R2L - R1L. Similarly, for R3 and R2, measuring t3 - t2 can yield another corresponding hyperbola CD. The intersection O of AB and CD is the exact location of the lightning strike. This transforms the location problem into one of measuring the time difference between the signal arrival times at different receiving stations, eliminating the need to measure the direction of the lightning wave.

[0089] For networks with more than three lightning locators, the least squares positioning algorithm or the optimal site geometry algorithm can be used to improve positioning accuracy.

[0090] After obtaining the lightning position, the lightning current intensity is calculated based on the strength of the lightning electromagnetic field:

[0091] I = N*B*R;

[0092] N: Instrument calibration constant.

[0093] B: Magnetic field strength of lightning electromagnetic waves.

[0094] R: The distance from the lightning to the lightning locator.

[0095] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A lightning locator based on a mobile platform, characterized by: include: Lightning signal acquisition module, used to collect electromagnetic wave signals of lightning; a posture measurement module, configured to detect posture changes of the lightning signal acquisition module; A positioning module is used to locate the geographical location information of the lightning locator.

2. The mobile platform-based lightning locator according to claim 1, characterized in that: It also includes a wireless communication module, which is used to transmit geographical location information, posture change information and electromagnetic wave signal information to the central station.

3. The mobile platform-based lightning locator according to claim 1, characterized in that: The positioning module is a Beidou positioning module.

4. The mobile platform-based lightning locator according to claim 1, characterized in that: The model of the attitude measurement module is the Xingyi brand ATK-MS901M model produced by Guangzhou Xingyi Electronic Technology Co., Ltd.

5. The mobile platform-based lightning locator according to claim 2, characterized in that: The wireless communication module adopts any of the following: The first type is the Hongdian brand 7118C wireless communication module produced by Shenzhen Hongdian Technology Co., Ltd.; The second type is the Xingqiao Hengyuan brand SN2P113YX Beidou communication terminal produced by Beijing Xingqiao Hengyuan Navigation Technology Co., Ltd.; The third type is the LeSat T2 Tiantong satellite data communication terminal under the LeZhong brand produced by Haining LeZhong Information Technology Co., Ltd.

6. The mobile platform-based lightning locator according to claim 1, characterized in that: The lightning signal acquisition module includes an electric field antenna, an east-west magnetic field ring antenna, and a north-south magnetic field ring antenna. The electric field antenna, the east-west magnetic field ring antenna, and the north-south magnetic field ring antenna are all arranged on a bracket. A bottom connecting plate is provided at the bottom of the bracket, and the attitude measurement module is installed on the bottom connecting plate.

7. The mobile platform-based lightning locator according to claim 1, characterized in that: It also includes a shell, a column and a chassis, the column is fixed on the chassis, the shell is arranged on the top of the column, and the lightning signal acquisition module is arranged in the shell.

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