Lightning warning method, device, equipment and storage medium

Abstract

The application relates to a thunder and lightning early warning method and device, equipment and a storage medium, and relates to the technical field of thunder and lightning early warning. The method comprises the following steps: acquiring atmospheric electric field data; performing difference calculation on the atmospheric electric field data to obtain a first-order difference signal of the atmospheric electric field; performing difference calculation on the first-order difference signal to obtain a second-order difference signal of the atmospheric electric field; comparing the absolute value of the atmospheric electric field data with a preset electric field amplitude threshold value to obtain a first comparison result, and determining whether a first timing is triggered according to the first comparison result; comparing the absolute value of the first-order difference signal with a preset first-order difference threshold value to obtain a second comparison result, and determining whether a second timing is triggered according to the second comparison result; acquiring the positive and negative sign polarity of the second-order difference signal, and determining whether a third timing is triggered according to the change state of the positive and negative sign polarity; and determining a thunder and lightning early warning level according to the number of currently triggered timings. The application aims to solve the problem of low accuracy in thunder and lightning early warning.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lightning warning, and in particular to a lightning warning method, device, equipment and storage medium. BACKGROUND

[0002] Atmospheric electric field is a very important parameter reflecting lightning activity, and has great significance for lightning physics research, lightning monitoring and prediction. When the charged thundercloud arrives, it will cause a large change in the atmospheric electric field on the ground. When lightning occurs, the corresponding rapid change of the atmospheric electric field on the ground is caused by the neutralization or release of the charge in the thundercloud. After lightning discharge, the charge distribution in the thundercloud is adjusted again under the action of strong convection electrification mechanism in the atmospheric cloud layer, and the atmospheric electric field on the ground also quickly recovers. The change, polarity and amplitude of the atmospheric electric field on the ground are closely related to the charge distribution structure and change in the thundercloud. Therefore, monitoring the atmospheric electric field on the ground can provide an important basis for lightning prediction.

[0003] The existing lightning warning method is to set an atmospheric electric field warning threshold (such as 3-5 kV / m), and when the detected atmospheric electric field value reaches the set warning threshold, an alarm is issued. However, this warning method has a high false alarm rate. Lightning often does not occur when the atmospheric electric field value exceeds the set warning threshold, and even when the electric field value reaches twice the threshold, lightning does not occur. SUMMARY

[0004] The present application provides a lightning warning method, device, equipment and storage medium to solve the technical problem of low accuracy in lightning warning in the prior art.

[0005] In a first aspect, the embodiments of the present application provide a lightning warning method, comprising:

[0006] obtaining atmospheric electric field data;

[0007] differencing the atmospheric electric field data to obtain a first-order difference signal of the atmospheric electric field;

[0008] differencing the first-order difference signal to obtain a second-order difference signal of the atmospheric electric field;

[0009] comparing the absolute value of the atmospheric electric field data with a preset electric field amplitude threshold to obtain a first comparison result, and determining whether to trigger a first timing according to the first comparison result;

[0010] comparing the absolute value of the first-order difference signal with a preset first-order difference threshold to obtain a second comparison result, and determining whether to trigger a second timing according to the second comparison result;

[0011] acquiring a positive and negative sign polarity of the second-order differential signal, and determining whether to trigger a third timing according to a change state of the positive and negative sign polarity;

[0012] determining a lightning warning level according to a number of timings currently triggered.

[0013] Optionally, the determining whether to trigger the first timing according to the first comparison result comprises:

[0014] if the first comparison result is that the absolute value of the atmospheric electric field data is greater than or equal to a preset electric field amplitude threshold, triggering the first timing;

[0015] if the first comparison result is that the absolute value of the atmospheric electric field data is less than the preset electric field amplitude threshold, not triggering the first timing.

[0016] Optionally, the determining whether to trigger the second timing according to the second comparison result comprises:

[0017] if the second comparison result is that the absolute value of the first-order differential signal is greater than or equal to a preset first-order differential threshold, triggering the second timing;

[0018] if the second comparison result is that the absolute value of the first-order differential signal is less than the preset first-order differential threshold, not triggering the second timing.

[0019] Optionally, the determining whether to trigger the third timing according to the change state of the positive and negative sign polarity comprises:

[0020] if the change state of the positive and negative sign polarity is that the positive and negative sign polarity changes, triggering the third timing;

[0021] if the change state of the positive and negative sign polarity is that the positive and negative sign polarity does not change, not triggering the third timing.

[0022] Optionally, after the differentiating the atmospheric electric field data to obtain the first-order differential signal of the atmospheric electric field, and before the differentiating the first-order differential signal to obtain the second-order differential signal of the atmospheric electric field, the method further comprises:

[0023] filtering the first-order differential signal.

[0024] Optionally, the duration of the first timing, the second timing and the third timing is obtained by pre-setting.

[0025] Optionally, the determining the lightning warning level according to the number of timings currently triggered comprises:

[0026] if the number of timings currently triggered is one, determining the lightning warning level as a first-level warning.

[0027] If the number of currently triggered time is two, the lightning warning level is determined as a second-level warning;

[0028] If the number of currently triggered time is three, the lightning warning level is determined as a third-level warning.

[0029] In a second aspect, an embodiment of the present application provides a lightning warning device, comprising:

[0030] A first obtaining module is configured to obtain atmospheric electric field data;

[0031] A first calculating module is configured to perform difference calculation on the atmospheric electric field data to obtain a first-order difference signal of the atmospheric electric field;

[0032] A second calculating module is configured to perform difference calculation on the first-order difference signal to obtain a second-order difference signal of the atmospheric electric field;

[0033] A first comparing module is configured to compare an absolute value of the atmospheric electric field data with a preset electric field amplitude threshold value to obtain a first comparison result, and determine whether to trigger a first time according to the first comparison result;

[0034] A second comparing module is configured to compare an absolute value of the first-order difference signal with a preset first-order difference threshold value to obtain a second comparison result, and determine whether to trigger a second time according to the second comparison result;

[0035] A second obtaining module is configured to obtain a positive and negative sign polarity of the second-order difference signal, and determine whether to trigger a third time according to a change state of the positive and negative sign polarity;

[0036] A timing module comprises a first timing unit, a second timing unit and a third timing unit, the first timing unit is configured to perform the first time, the second timing unit is configured to perform the second time, and the third timing unit is configured to perform the third time;

[0037] A warning module is configured to determine a lightning warning level according to a number of currently triggered times.

[0038] In a third aspect, an embodiment of the present application provides an electronic device, comprising a processor, a memory and a communication bus, wherein the processor and the memory complete mutual communication through the communication bus;

[0039] The memory is configured to store a computer program;

[0040] The processor is configured to execute the program stored in the memory to realize the lightning warning method in the first aspect.

[0041] In a fourth aspect, the embodiments of the present application provide a computer readable storage medium storing a computer program, and the computer program, when executed by a processor, implements the lightning warning method in the first aspect.

[0042] The above technical solution provided by the embodiments of the present application has the following advantages compared with the prior art: in the embodiments of the present application, the lightning warning level is determined by three factors, i.e., a first comparison result obtained by comparing the absolute value of the atmospheric electric field data with a preset electric field amplitude threshold, a second comparison result obtained by comparing the absolute value of the first-order differential signal with a preset first-order differential threshold, and the change state of the positive and negative polarity of the second-order differential signal. Compared with the prior art in which an alarm is sent when the detected atmospheric electric field value reaches the atmospheric electric field warning threshold, the present application fully utilizes the change characteristics of the curve of the atmospheric electric field data, introduces the second-order derivative, and has more abundant information. The lightning warning method is scientific and rigorous, the accuracy of lightning warning is higher, the first-order and second-order derivative calculations are realized by using the first-order differential signal and the second-order differential signal, no hardware cost is increased, the scheme is easy to implement, and the technical problem of low accuracy in lightning warning in the prior art is solved. BRIEF DESCRIPTION OF DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and serve to explain the principles of the present application together with the specification.

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0045] Figure 1 A method flowchart for lightning warning in the embodiments of the present application;

[0046] Figure 2 A schematic diagram of an atmospheric electric field curve on the ground in a certain thunderstorm process in one specific embodiment of the present application;

[0047] Figure 3 A structural schematic diagram of a lightning warning device in the embodiments of the present application;

[0048] Figure 4 A structural schematic diagram of a lightning warning device in one specific embodiment of the present application;

[0049] Figure 5 A structural schematic diagram of an electronic device in the embodiments of the present application. DETAILED DESCRIPTION

[0050] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0051] In the embodiments of the present application, a lightning early warning method is provided. As shown in the figure, Figure 1 The method flow of the lightning early warning mainly includes:

[0052] Step 101, obtaining atmospheric electric field data.

[0053] The atmospheric electric field data can be obtained by an atmospheric electric field instrument, and the atmospheric electric field data can be used to draw an atmospheric electric field curve. The zero-order derivative of the atmospheric electric field curve is the atmospheric electric field amplitude, and the size of the atmospheric electric field amplitude is often used for traditional electric field threshold early warning.

[0054] The atmospheric electric field data at discrete time point k is denoted by E(k).

[0055] Step 102, obtaining a first-order difference signal of the atmospheric electric field by differentiating the atmospheric electric field data.

[0056] The first-order difference signal of the atmospheric electric field is the difference between the atmospheric electric field data at the previous and next time points. The calculation formula of the first-order difference signal of the atmospheric electric field is as follows:

[0057] ΔE(k) = E(k) - E(k-1) (1)

[0058] Wherein, ΔE(k) is the first-order difference signal of the atmospheric electric field at discrete time point k, E(k) is the atmospheric electric field data at discrete time point k, and E(k-1) is the atmospheric electric field data at discrete time point (k-1).

[0059] The first-order difference signal is obtained by differentiating the atmospheric electric field curve, which can represent the jump amplitude of the atmospheric electric field. The larger the first-order difference signal of the atmospheric electric field is, the larger the jump amplitude of the atmospheric electric field is. Therefore, the first-order difference of the atmospheric electric field curve can be used for atmospheric electric field jump early warning.

[0060] Step 103, obtaining a second-order difference signal of the atmospheric electric field by differentiating the first-order difference signal.

[0061] The second-order difference signal of the atmospheric electric field is the difference between the first-order difference signals of the atmospheric electric field at the previous and next time points. The calculation formula of the second-order difference signal of the atmospheric electric field is as follows:

[0062] Δ(ΔE(k))=ΔE(k)-ΔE(k-1)

[0063] =(E(k)-E(k-1))-(E(k-1)-E(k-2))=E(k)-2E(k-1)+E(k-2) (2)

[0064] Wherein, Δ(ΔE(k)) is the second-order difference signal of the atmospheric electric field at discrete time k, ΔE(k) is the first-order difference signal of the atmospheric electric field at discrete time k, ΔE(k-1) is the first-order difference signal of the atmospheric electric field at discrete time (k-1), E(k) is the atmospheric electric field data at discrete time k, E(k-1) is the atmospheric electric field data at discrete time (k-1), and E(k-2) is the atmospheric electric field data at discrete time (k-2).

[0065] Solving for the second derivative of the atmospheric electric field can be used to find the inflection point of the atmospheric electric field.

[0066] In one specific embodiment, such as Figure 2 The figure shown is a schematic diagram of the atmospheric electric field curve on the ground during a thunderstorm. Figure 2 In the graph, the horizontal axis represents time, and the vertical axis represents kV / m. For example... Figure 2 As shown, extensive data analysis reveals the following characteristics of the atmospheric electric field curve: A weak initial lightning strike occurs a considerable time before the arrival of the true strong lightning. Although the electric field generated by this initial lightning is small, its transition can be detected by calculating the first-order difference of the atmospheric electric field curve. Following this, the curve forms a spike, then dips, exhibiting a distinct inflection point. This inflection point can be obtained by calculating the second-order difference of the atmospheric electric field curve. Shortly after this inflection point (typically 10-20 minutes), the true strong lightning arrives as the electric field amplitude increases. Therefore, calculating the second-order difference of the atmospheric electric field can be used to locate this inflection point.

[0067] In one specific embodiment, after differentiating the atmospheric electric field data to obtain the first-order differential signal of the atmospheric electric field, and before differentiating the first-order differential signal to obtain the second-order differential signal of the atmospheric electric field, the lightning warning method further includes filtering the first-order differential signal.

[0068] Before obtaining the second-order differential signal of the atmospheric electric field, filtering the first-order differential signal to remove interference noise helps to further reduce the probability of false alarms and minimize false alarms. Filtering methods include, but are not limited to, smoothing filtering.

[0069] For example, the smoothing filtering method is a third to fifth order smoothing filter. Let ΔEf(k) represent the filtered first-order difference signal. The formula for calculating the filtered first-order difference signal is as follows:

[0070] ΔEf(k) = (ΔE(k) + ΔE(k-1) + ΔE(k-2) + ΔE(k-3) + ΔE(k-4)) / 5 (3)

[0071] wherein, ΔEf(k) is the filtered first-order difference signal of the atmospheric electric field at the discrete time point k, ΔE(k) is the unfiltered first-order difference signal of the atmospheric electric field at the discrete time point k, ΔE(k-1) is the unfiltered first-order difference signal at the discrete time point (k-1), ΔE(k-2) is the unfiltered first-order difference signal at the discrete time point (k-2), ΔE(k-3) is the unfiltered first-order difference signal at the discrete time point (k-3), and ΔE(k-4) is the unfiltered first-order difference signal at the discrete time point (k-4).

[0072] Step 104, comparing the absolute value of the atmospheric electric field data with the preset electric field amplitude threshold value to obtain a first comparison result, and determining whether to trigger the first timing according to the first comparison result.

[0073] The preset electric field amplitude threshold value is a preset value, which can be an empirical value or a value obtained through multiple tests.

[0074] In one specific embodiment, determining whether to trigger the first timing according to the first comparison result includes: if the first comparison result is that the absolute value of the atmospheric electric field data is greater than or equal to the preset electric field amplitude threshold value, triggering the first timing; and if the first comparison result is that the absolute value of the atmospheric electric field data is less than the preset electric field amplitude threshold value, not triggering the first timing.

[0075] Step 105, comparing the absolute value of the first-order difference signal with the preset first-order difference threshold value to obtain a second comparison result, and determining whether to trigger the second timing according to the second comparison result.

[0076] The preset first-order difference threshold value is a preset value, which can be an empirical value or a value obtained through multiple tests.

[0077] In one specific embodiment, determining whether to trigger the second timing according to the second comparison result includes: if the second comparison result is that the absolute value of the first-order difference signal is greater than or equal to the preset first-order difference threshold value, triggering the second timing; and if the second comparison result is that the absolute value of the first-order difference signal is less than the preset first-order difference threshold value, not triggering the second timing.

[0078] Step 106, obtaining the positive and negative sign polarity of the second-order difference signal, and determining whether to trigger the third timing according to the change state of the positive and negative sign polarity.

[0079] The change state of the positive and negative sign polarities includes a change of the positive and negative sign polarities and no change of the positive and negative sign polarities.

[0080] The triggering and the end of the timing among the first timing, the second timing and the third timing are independent of each other, that is, when the first timing ends, the step of determining whether to trigger the first timing according to the first comparison result is returned to execute; when the second timing ends, the step of determining whether to trigger the second timing according to the second comparison result is returned to execute; when the third timing ends, the step of determining whether to trigger the third timing according to the change state of the positive and negative sign polarities is returned to execute.

[0081] In one embodiment, the step of determining whether to trigger the third timing according to the change state of the positive and negative sign polarities includes: if the change state of the positive and negative sign polarities is a change of the positive and negative sign polarities, triggering the third timing; if the change state of the positive and negative sign polarities is no change of the positive and negative sign polarities, not triggering the third timing.

[0082] The second derivative of the atmospheric electric field can be used to find the inflection point of the atmospheric electric field. In theory, when the second derivative of the atmospheric electric field is zero, it means that the inflection point has arrived. However, in practice, due to the existence of noise, it is difficult to accurately find the time point when the second derivative is zero, so the second difference of the atmospheric electric field curve is calculated, and when the positive and negative sign polarities of the second difference change, it means that the inflection point has appeared. Therefore, by judging whether the positive and negative sign polarities of the second difference signal change, it can be determined whether the inflection point has appeared.

[0083] In one embodiment, the duration of the first timing, the second timing and the third timing is obtained by pre-setting, which can be half an hour, one hour, two hours or other time lengths. The duration of the first timing, the second timing and the third timing can be equal or not equal. For example, the first timing, the second timing and the third timing are all one hour.

[0084] In step 107, the lightning warning level is determined according to the number of currently triggered timings.

[0085] In one embodiment, the lightning warning level is determined according to the number of currently triggered timings, which includes: if the number of currently triggered timings is one, determining the lightning warning level as a first-level warning; if the number of currently triggered timings is two, determining the lightning warning level as a second-level warning; if the number of currently triggered timings is three, determining the lightning warning level as a third-level warning.

[0086] In summary, in the embodiment of the present application, the lightning warning level is determined by three factors, i.e., the first comparison result obtained by comparing the absolute value of the atmospheric electric field data with the preset electric field amplitude threshold, the second comparison result obtained by comparing the absolute value of the first-order differential signal with the preset first-order differential threshold, and the change state of the positive and negative sign polarity of the second-order differential signal. Compared with the prior art scheme of issuing an alarm when the detected atmospheric electric field value reaches the atmospheric electric field warning threshold, the present application makes full use of the change characteristics of the curve of the atmospheric electric field data, introduces the second derivative, and has more abundant information. The lightning warning method is scientific and rigorous, and the accuracy of lightning warning is higher. The first-order and second-order derivative calculations are realized by using the first-order differential signal and the second-order differential signal, without increasing the hardware cost. The scheme is easy to implement, and solves the technical problem of low accuracy in lightning warning in the prior art.

[0087] Based on the same concept, the present application provides a lightning warning device. The specific implementation of the device can be referred to the description of the method embodiment part, and the repeated parts will not be described here. As shown in Figure 3 The device mainly includes:

[0088] The first acquisition module 301 is configured to acquire atmospheric electric field data.

[0089] The first calculation module 302 is configured to perform differentiation on the atmospheric electric field data to obtain a first-order differential signal of the atmospheric electric field.

[0090] The second calculation module 303 is configured to perform differentiation on the first-order differential signal to obtain a second-order differential signal of the atmospheric electric field.

[0091] The first comparison module 304 is configured to compare the absolute value of the atmospheric electric field data with the preset electric field amplitude threshold to obtain a first comparison result, and determine whether to trigger a first timing according to the first comparison result.

[0092] The second comparison module 305 is configured to compare the absolute value of the first-order differential signal with the preset first-order differential threshold to obtain a second comparison result, and determine whether to trigger a second timing according to the second comparison result.

[0093] The second acquisition module 306 is configured to acquire the positive and negative sign polarity of the second-order differential signal, and determine whether to trigger a third timing according to the change state of the positive and negative sign polarity.

[0094] The timing module 307 includes a first timing unit 3071, a second timing unit 3072, and a third timing unit 3073. The first timing unit 3071 is configured to perform the first timing, the second timing unit 3072 is configured to perform the second timing, and the third timing unit 3073 is configured to perform the third timing.

[0095] The warning module 308 is configured to determine the lightning warning level according to the number of currently triggered timings.

[0096] The first acquisition module 301 can be an atmospheric electric field instrument.

[0097] The first-order differential signal of the atmospheric electric field is the difference between the atmospheric electric field data at the previous time and the next time, which can be calculated by formula (1). The second-order differential signal of the atmospheric electric field is the difference between the first-order differential signal of the atmospheric electric field at the previous time and the next time, which can be calculated by formula (2). The second-order differential of the atmospheric electric field can be used to find the inflection point of the atmospheric electric field.

[0098] The second-order derivative of the atmospheric electric field can be used to find the inflection point of the atmospheric electric field. In theory, when the second-order derivative of the atmospheric electric field is zero, it means that the inflection point has arrived. However, in practice, due to the existence of noise, it is difficult to accurately find the time point when the second-order derivative is zero, so the second-order difference of the atmospheric electric field curve can be calculated, and when the positive and negative signs of the second-order difference change, it means that the inflection point has appeared. Therefore, by judging whether the positive and negative signs of the second-order difference signal change, it can be determined whether the inflection point has appeared.

[0099] The triggering and timing end of the first timing, the second timing and the third timing are independent of each other. The duration of the first timing, the second timing and the third timing is obtained by pre-setting, which can be half an hour, one hour, two hours or other lengths.

[0100] Specifically, according to the number of currently triggered timings, the lightning warning level is determined, including: if the number of currently triggered timings is one, the lightning warning level is determined to be a first-level warning; if the number of currently triggered timings is two, the lightning warning level is determined to be a second-level warning; if the number of currently triggered timings is three, the lightning warning level is determined to be a third-level warning.

[0101] In one specific embodiment, as shown in Figure 4 The lightning warning device further includes a filtering module 309.

[0102] The filtering module 309 is configured to filter the first-order differential signal.

[0103] By filtering the first-order differential signal, interference noise can be filtered out, which helps to further reduce the false alarm probability and avoid false alarms as much as possible. The filtering method includes but is not limited to smoothing filtering method.

[0104] Based on the same concept, the present application also provides an electronic device, as shown in Figure 5As shown, the electronic device mainly includes a processor 501, a memory 502 and a communication bus 503, wherein the processor 501 and the memory 502 complete mutual communication through the communication bus 503. The memory 502 stores a program executable by the processor 501, and the processor 501 executes the program stored in the memory 502 to implement the following steps:

[0105] Obtaining atmospheric electric field data; obtaining a first-order differential signal of the atmospheric electric field by differentiating the atmospheric electric field data; obtaining a second-order differential signal of the atmospheric electric field by differentiating the first-order differential signal; comparing an absolute value of the atmospheric electric field data with a preset electric field amplitude threshold value to obtain a first comparison result, and determining whether to trigger a first timing according to the first comparison result; comparing an absolute value of the first-order differential signal with a preset first-order differential threshold value to obtain a second comparison result, and determining whether to trigger a second timing according to the second comparison result; obtaining a positive and negative sign polarity of the second-order differential signal, and determining whether to trigger a third timing according to a change state of the positive and negative sign polarity; and determining a lightning warning level according to a number of timings currently triggered.

[0106] The communication bus 503 mentioned in the above electronic device can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The communication bus 503 can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, Figure 5 Only one thick line is used in the above electronic device, but it does not mean that there is only one bus or one type of bus.

[0107] The memory 502 can include a random access memory (RAM) and can also include a non-volatile memory, such as at least one disk memory. Optionally, the memory can also be at least one storage device located away from the aforementioned processor 501.

[0108] The processor 501 described above can be a general processor, including a central processing unit (CPU), a network processor (NP), etc., and can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.

[0109] In yet another embodiment of the present application, a computer readable storage medium is also provided, which stores a computer program. When the computer program is run on a computer, the computer is enabled to perform the lightning warning method described in the above embodiments.

[0110] In the above embodiments, the implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented by using software, the implementation can be achieved entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are entirely or partially generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable apparatus. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions are transferred from one website, computer, server, or data center to another website, computer, server, or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, microwave, etc.) manner. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media sets. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape, etc.), an optical medium (such as a DVD), or a semiconductor medium (such as a solid-state disk), etc.

[0111] It has to be noted that, in the present document, relational terms are intended only to convey a possible relationship between elements or

[0112] The foregoing is considered as illustrative only of the principles of the application. Numerous modifications and changes will readily occur to those skilled in the art, which modifications and changes are to be understood as intended to be encompassed by the general scope of the application. Accordingly, the application is not to be limited to the above described or illustrated embodiments, but is intended to encompass all embodiments consistent with the principles of the application.

Claims

1. A lightning warning method, characterized by, The method comprises the following steps: obtaining atmospheric electric field data; differencing the atmospheric electric field data to obtain a first-order differential signal of the atmospheric electric field; differencing the first-order differential signal to obtain a second-order differential signal of the atmospheric electric field; comparing the absolute value of the atmospheric electric field data with a preset electric field amplitude threshold to obtain a first comparison result, and determining whether to trigger a first timing according to the first comparison result; if the first comparison result is that the absolute value of the atmospheric electric field data is greater than or equal to the preset electric field amplitude threshold, the first timing is triggered; if the first comparison result is that the absolute value of the atmospheric electric field data is less than the preset electric field amplitude threshold, the first timing is not triggered; comparing the absolute value of the first-order differential signal with a preset first-order differential threshold to obtain a second comparison result, and determining whether to trigger a second timing according to the second comparison result; if the second comparison result is that the absolute value of the first-order differential signal is greater than or equal to the preset first-order differential threshold, the second timing is triggered; if the second comparison result is that the absolute value of the first-order differential signal is less than the preset first-order differential threshold, the second timing is not triggered; obtaining the positive and negative sign polarity of the second-order differential signal, and determining whether to trigger a third timing according to the change state of the positive and negative sign polarity; if the change state of the positive and negative sign polarity is that the positive and negative sign polarity changes, the third timing is triggered; if the change state of the positive and negative sign polarity is that the positive and negative sign polarity does not change, the third timing is not triggered; determining a lightning warning level according to the number of currently triggered timings.

2. The lightning warning method of claim 1, wherein, After the step of differentiating the atmospheric electric field data to obtain a first-order differential signal of the atmospheric electric field, before the step of differentiating the first-order differential signal to obtain a second-order differential signal of the atmospheric electric field, the method further comprises: filtering the first-order differential signal.

3. The lightning warning method according to claim 1 or 2, characterized in that, The duration of the first timing, the second timing and the third timing is obtained by pre-setting.

4. The lightning warning method of claim 3, wherein, The determination of the lightning warning level according to the number of currently triggered timings comprises: if the number of currently triggered timings is one, the lightning warning level is determined to be a first-level warning; if the number of currently triggered timings is two, the lightning warning level is determined to be a second-level warning; if the number of currently triggered timings is three, the lightning warning level is determined to be a third-level warning.

5. A lightning warning device, characterized in that The method comprises the following steps: a first obtaining module for obtaining atmospheric electric field data; a first calculating module for differentiating the atmospheric electric field data to obtain a first-order differential signal of the atmospheric electric field; a second calculating module for differentiating the first-order differential signal to obtain a second-order differential signal of the atmospheric electric field; a first comparing module for comparing the absolute value of the atmospheric electric field data with a preset electric field amplitude threshold to obtain a first comparison result, and determining whether to trigger a first timing according to the first comparison result; if the first comparison result is that the absolute value of the atmospheric electric field data is greater than or equal to the preset electric field amplitude threshold, the first timing is triggered; if the first comparison result is that the absolute value of the atmospheric electric field data is less than the preset electric field amplitude threshold, the first timing is not triggered; a second comparing module for comparing the absolute value of the first-order differential signal with a preset first-order differential threshold to obtain a second comparison result, and determining whether to trigger a second timing according to the second comparison result; if the second comparison result is that the absolute value of the first-order differential signal is greater than or equal to the preset first-order differential threshold, the second timing is triggered; if the second comparison result is that the absolute value of the first-order differential signal is less than the preset first-order differential threshold, the second timing is not triggered; a third comparing module for obtaining the positive and negative sign polarity of the second-order differential signal, and determining whether to trigger a third timing according to the change state of the positive and negative sign polarity; if the change state of the positive and negative sign polarity is that the positive and negative sign polarity changes, the third timing is triggered; if the change state of the positive and negative sign polarity is that the positive and negative sign polarity does not change, the third timing is not triggered; a determining module for determining a lightning warning level according to the number of currently triggered timings. The second comparison module is configured to compare the absolute value of the first-order differential signal with a preset first-order differential threshold to obtain a second comparison result, and determine whether to trigger a second timing according to the second comparison result; If the second comparison result is that the absolute value of the first-order differential signal is greater than or equal to the preset first-order differential threshold, the second timing is triggered; if the second comparison result is that the absolute value of the first-order differential signal is less than the preset first-order differential threshold, the second timing is not triggered; The second acquisition module is configured to acquire the positive and negative sign polarity of the second-order differential signal, and determine whether to trigger a third timing according to the change state of the positive and negative sign polarity; If the change state of the positive and negative sign polarity is that the positive and negative sign polarity changes, the third timing is triggered; If the change state of the positive and negative sign polarity is that the positive and negative sign polarity does not change, the third timing is not triggered; The timing module includes a first timing unit, a second timing unit and a third timing unit, the first timing unit is configured to perform the first timing, the second timing unit is configured to perform the second timing, and the third timing unit is configured to perform the third timing; The early warning module is configured to determine a lightning early warning level according to the number of currently triggered timings.

6. An electronic device, comprising: It comprises: a processor, a memory and a communication bus, wherein the processor and the memory complete mutual communication through the communication bus; The memory is configured to store a computer program; The processor is configured to execute the program stored in the memory to realize the lightning early warning method in any one of claims 1 to 4.

7. A computer readable storage medium storing a computer program, characterized in that, The computer program is executed by the processor to realize the lightning early warning method in any one of claims 1 to 4.

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