阅读说明：本技术 一种雷电预警方法及雷电预警设备 (Lightning early warning method and lightning early warning device ) 是由 李博琛 李欣 于 2021-09-13 设计创作，主要内容包括：本发明提供一种雷电预警方法包括：检测待测空间的大气电场参数；判断所述大气电场参数是否达到电场预警条件；若未达到所述电场预警条件,则返回所述步骤检测待测空间的大气电场参数；若达到所述电场预警条件,则启动雷达扫描云层的云层参数；确定预警目标物的地理参数；基于云层参数及地理参数获取针对预警目标物的云层危害程度系数；判断所述云层危害程度系数是否达到云层参数预警条件；若达到所述云层参数预警条件,则推送预警信号；若未达到所述云层参数预警条件,则返回所述步骤检测待测空间的大气电场参数。本发明提供的雷电预警方法通过先进行大气电场检测,在大气电场检测满足预设条件的情形下,然后进行雷达对云层参数的检测以及确定预警目标物的地理参数。(The invention provides a lightning early warning method which comprises the following steps: detecting atmospheric electric field parameters of a space to be detected; judging whether the atmospheric electric field parameters reach electric field early warning conditions or not; if the electric field early warning condition is not met, returning to the step to detect the atmospheric electric field parameters of the space to be detected; if the electric field early warning condition is met, starting a radar to scan cloud layer parameters of a cloud layer; determining the geographic parameters of the early warning target object; acquiring a cloud layer hazard degree coefficient aiming at an early warning target object based on the cloud layer parameter and the geographic parameter; judging whether the cloud layer damage degree coefficient reaches a cloud layer parameter early warning condition or not; if the cloud layer parameter early warning condition is met, pushing an early warning signal; and if the cloud layer parameter early warning condition is not met, returning to the step to detect the atmospheric electric field parameters of the space to be detected. According to the lightning early warning method, atmospheric electric field detection is firstly carried out, and then detection of cloud layer parameters by a radar and determination of geographic parameters of early warning target objects are carried out under the condition that the atmospheric electric field detection meets preset conditions.)

1. A lightning early warning method is characterized by comprising the following steps:

detecting atmospheric electric field parameters of a space to be detected;

judging whether the atmospheric electric field parameters reach electric field early warning conditions or not;

if the electric field early warning condition is not met, returning to the step to detect the atmospheric electric field parameters of the space to be detected;

if the electric field early warning condition is met, starting a radar to scan cloud layer parameters of a cloud layer;

determining the geographic parameters of the early warning target object;

acquiring a cloud layer hazard degree coefficient aiming at the early warning target object based on the cloud layer parameter and the geographic parameter;

judging whether the cloud layer damage degree coefficient reaches a cloud layer parameter early warning condition or not;

if the cloud layer parameter early warning condition is met, pushing an early warning signal;

and if the cloud layer parameter early warning condition is not met, returning to the step to detect the atmospheric electric field parameters of the space to be detected.

2. The lightning early warning method of claim 1, wherein the cloud layer parameters comprise an echo intensity dBz of radar detection; the geographic parameters comprise an included angle theta between the early warning target object and the radar connecting line and between the central projection point of the cloud layer and the radar connecting line; in the step of obtaining the cloud layer damage degree coefficient for the early warning target object based on the cloud layer parameter and the geographic parameter, the larger the echo intensity dBz is, the larger the cloud layer damage degree coefficient is, the smaller the echo intensity dBz is, the smaller the cloud layer damage degree coefficient is, and the larger the included angle theta is, the smaller the cloud layer damage degree coefficient is, and the smaller the included angle theta is, the larger the cloud layer damage degree coefficient is.

3. The lightning early warning method of claim 2, wherein the cloud layer parameters further comprise a height H of the cloud layer above the ground and a distance L between the cloud layer and the radar; the geographic parameter further comprises a distance S between the early warning target object and the radar; the step of obtaining a cloud layer hazard degree coefficient for the early warning target object based on the cloud layer parameter and the geographic parameter specifically comprises the following steps:

according to the functional relationship between the cloud layer harm degree coefficient and the cloud layer parameter and the geographic parameterAcquiring a cloud layer hazard degree coefficient delta; wherein, delta is cloud layer damage degree coefficient, and k is empirical parameter.

4. The lightning early warning method according to claim 3, wherein the step of judging whether the cloud layer damage degree coefficient reaches the cloud layer parameter early warning condition specifically comprises:

judging whether the cloud layer damage degree coefficient delta is larger than or equal to a cloud layer damage degree coefficient threshold delta_iWherein the cloud layer parameter early warning condition is a preset cloud layer hazard degree coefficient threshold value delta_i。

5. The lightning early warning method of claim 4, wherein before the step of pushing an early warning signal if the cloud parameter early warning condition is reached, the lightning early warning method further comprises:

and generating a radar early warning map based on the atmospheric electric field parameter, the cloud layer parameter, the geographic parameter and the cloud layer hazard degree coefficient.

6. The lightning early warning method of claim 5, wherein the step of determining whether the atmospheric electric field parameter meets an electric field early warning condition further comprises:

judging whether the atmospheric electric field parameters reach a primary electric field early warning condition or not;

if the first-level electric field early warning condition is met, starting a radar to scan cloud layer parameters of a cloud layer if the electric field early warning condition is met, and further comprising the following steps of: starting the radar to periodically scan the cloud layer parameters at preset time intervals;

and if the primary electric field early warning condition is not met, returning to the step to detect the atmospheric electric field parameters of the space to be detected.

7. The lightning early warning method of claim 6, wherein the step of determining whether the atmospheric electric field parameter meets an electric field early warning condition further comprises:

if the primary electric field early warning condition is met, judging whether the atmospheric electric field parameter meets a secondary electric field early warning condition;

if the secondary electric field early warning condition is met, adjusting the radar to be in an uninterrupted scanning mode;

and if the secondary electric field early warning condition is not met, returning to the step to detect the atmospheric electric field parameters of the space to be detected.

8. The lightning early warning method of claim 7, wherein the step of determining whether the atmospheric electric field parameter meets an electric field early warning condition further comprises:

if the secondary electric field early warning condition is met, judging whether the early warning target object has a preset license;

if the preset license exists, entering the step to generate a radar early warning map based on the atmospheric electric field parameter, the cloud layer parameter and the cloud layer hazard degree coefficient;

if the preset license does not exist, judging whether the atmospheric electric field parameters reach a three-level electric field early warning condition or not;

if the three-level electric field early warning condition is met, entering the step to generate a radar early warning map based on the atmospheric electric field parameter, the cloud layer parameter and the cloud layer hazard degree coefficient;

and if the three-level electric field early warning condition is not met, returning to the step to detect the atmospheric electric field parameters of the space to be detected.

9. The lightning early warning method of claim 8, wherein the electric field early warning condition is a preset atmospheric electric field parameter threshold, the primary electric field early warning condition is a preset primary atmospheric electric field parameter threshold, the secondary electric field early warning condition is a preset secondary atmospheric electric field parameter threshold, the tertiary electric field early warning condition is a preset tertiary atmospheric electric field parameter threshold, and the primary atmospheric electric field parameter threshold, the secondary atmospheric electric field parameter threshold and the tertiary atmospheric electric field parameter threshold are sequentially increased;

the step of judging whether the atmospheric electric field parameters reach electric field early warning conditions specifically comprises the following steps: judging whether the atmospheric electric field parameter is greater than or equal to the atmospheric electric field parameter threshold value;

if the cloud layer parameter early warning condition is met, after an early warning signal is pushed, the lightning early warning method further comprises the following steps:

judging whether the early warning signal is continuously pushed or not;

if the judgment result is yes, returning to the step, and if the cloud layer parameter early warning condition is reached, pushing an early warning signal;

and if the judgment result is negative, canceling the early warning signal.

10. A lightning early warning device, characterized in that the lightning early warning device comprises:

the atmospheric electric field instrument is used for detecting atmospheric electric field parameters of the space to be detected;

the radar is used for detecting cloud layer parameters of a cloud layer in the space to be detected;

the at least one processor is used for realizing each program and controlling the atmospheric electric field instrument and the radar to carry out detection operation;

at least one memory for storing at least one program;

the at least one program, when executed by the at least one processor, causes the lightning early warning device to implement the method of any one of claims 1-9.

Technical Field

The invention relates to the field of lightning early warning, in particular to a lightning early warning method and lightning early warning equipment.

Background

Thunder and lightning is an atmospheric discharge phenomenon generated in strong convection weather, and has short discharge time and huge energy. The heat energy generated by the strong current of the thunder, the high-frequency electromagnetic field generated by the area around the thunder, the strong thunder wave and the like can generate huge damage in a moment, which can cause casualties, damage communication equipment, damage buildings, cause the open circuit of a power distribution device and cause fire and the like. Therefore, the early warning is accurately and timely carried out before the lightning happens, and the method has important significance for protecting the life and property safety of people. However, the formation of the lightning is influenced by many factors, such as geographical and geological features, climatic features, changes of surrounding environment and the like of the occurrence area, and the characteristics of instantaneous occurrence of the lightning, which bring difficulty to accurate early warning of the lightning. At present, an atmospheric electric field instrument is adopted to detect the atmospheric electric field intensity so as to carry out lightning early warning, but the lightning early warning is difficult to accurately locate the specific occurrence position of the lightning, so that the lightning early warning is not accurate and timely enough, and particularly the lightning early warning of a specific early warning target object is more difficult.

Disclosure of Invention

In view of this, the present invention aims to provide an accurate and efficient lightning early warning method and lightning early warning device.

In order to achieve the purpose of the invention, the invention provides a lightning early warning method, which comprises the following steps: detecting atmospheric electric field parameters of a space to be detected; judging whether the atmospheric electric field parameters reach electric field early warning conditions or not; if the electric field early warning condition is not met, returning to the step to detect the atmospheric electric field parameters of the space to be detected; if the electric field early warning condition is met, starting a radar to scan cloud layer parameters of a cloud layer; determining the geographic parameters of the early warning target object; acquiring a cloud layer hazard degree coefficient aiming at the early warning target object based on cloud layer parameters and the geographic parameters; judging whether the cloud layer damage degree coefficient reaches a cloud layer parameter early warning condition or not; if the cloud layer parameter early warning condition is met, pushing an early warning signal; and if the cloud layer parameter early warning condition is not met, returning to the step to detect the atmospheric electric field parameters of the space to be detected.

Optionally, the cloud layer parameter comprises an echo intensity dBz of radar detection. The geographic parameters comprise an included angle theta between the early warning target object and the radar connecting line and the central projection point of the cloud layer and the radar connecting line. In the step, in acquiring a cloud layer hazard degree coefficient for the early warning target object based on the cloud layer parameter and the geographic parameter, the greater the echo intensity dBz is, the greater the cloud layer hazard degree coefficient is; the smaller the echo intensity dBz is, the smaller the cloud layer damage degree coefficient is; the larger the included angle theta is, the smaller the cloud layer damage degree coefficient is; the smaller the included angle theta is, the larger the cloud layer hazard degree coefficient is.

Optionally, the cloud layer parameters further include the cloud layer ground clearance H and a distance L between the cloud layer and the radar. The geographic parameter further includes a distance S between the early warning target and the radar. The step of obtaining a cloud layer hazard degree coefficient for the early warning target object based on the cloud layer parameter and the geographic parameter specifically comprises the following steps: according to the functional relationship between the cloud layer harm degree coefficient and the cloud layer parameter and the geographic parameterAcquiring a cloud layer hazard degree coefficient delta; wherein, delta is cloud layer damage degree coefficient, and k is empirical parameter.

Optionally, the step of determining whether the cloud layer hazard degree coefficient reaches the cloud layer parameter early warning condition specifically includes: judging whether the cloud layer damage degree coefficient delta is larger than or equal to a cloud layer damage degree coefficient threshold delta_iWherein the cloud layer parameter early warning condition is a preset cloud layer hazard degree coefficient threshold value delta_i。

Optionally, before the step of pushing an early warning signal if the cloud layer parameter early warning condition is reached, the lightning early warning method further includes: and generating a radar early warning map based on the atmospheric electric field parameter, the cloud layer parameter, the geographic parameter and the cloud layer hazard degree coefficient.

Optionally, the step of determining whether the atmospheric electric field parameter reaches an electric field early warning condition further includes: judging whether the atmospheric electric field parameters reach a primary electric field early warning condition or not; if the first-level electric field early warning condition is met, starting a radar to scan cloud layer parameters of a cloud layer if the electric field early warning condition is met, and further comprising the following steps of: starting the radar to periodically scan the cloud layer parameters at preset time intervals;

and if the primary electric field early warning condition is not met, returning to the step to detect the atmospheric electric field parameters of the space to be detected.

Optionally, the step of determining whether the atmospheric electric field parameter reaches an electric field early warning condition further includes: if the primary electric field early warning condition is met, judging whether the atmospheric electric field parameter meets a secondary electric field early warning condition; if the secondary electric field early warning condition is met, adjusting the radar to be in an uninterrupted scanning mode; and if the secondary electric field early warning condition is not met, returning to the step to detect the atmospheric electric field parameters of the space to be detected.

Optionally, the step of determining whether the atmospheric electric field parameter reaches an electric field early warning condition further includes: if the secondary electric field early warning condition is met, judging whether the early warning target object has a preset license; if the preset license exists, entering the step to generate a radar early warning map based on the atmospheric electric field parameter, the cloud layer parameter and the cloud layer hazard degree coefficient; if the preset license does not exist, judging whether the atmospheric electric field parameters reach a three-level electric field early warning condition or not; if the three-level electric field early warning condition is met, entering the step to generate a radar early warning map based on the atmospheric electric field parameter, the cloud layer parameter and the cloud layer hazard degree coefficient; and if the three-level electric field early warning condition is not met, returning to the step to detect the atmospheric electric field parameters of the space to be detected.

Optionally, the electric field early warning condition is a preset atmospheric electric field parameter threshold, and the primary electric field early warning condition is a preset primary atmospheric electric field parameter threshold. The secondary electric field early warning condition is a preset secondary atmospheric electric field parameter threshold value. The three-level electric field early warning condition is a preset three-level atmospheric electric field parameter threshold value. The primary atmospheric electric field parameter threshold, the secondary atmospheric electric field parameter threshold and the tertiary atmospheric electric field parameter threshold are sequentially increased. The step of judging whether the atmospheric electric field parameters reach electric field early warning conditions specifically comprises the following steps: and judging whether the atmospheric electric field parameter is greater than or equal to the atmospheric electric field parameter threshold value. If the cloud layer parameter early warning condition is met, after an early warning signal is pushed, the lightning early warning method further comprises the following steps: judging whether the early warning signal is continuously pushed or not; if the judgment result is yes, returning to the step, and if the cloud layer parameter early warning condition is reached, pushing an early warning signal; and if the judgment result is negative, canceling the early warning signal.

The invention also provides lightning early warning equipment. The lightning early warning device comprises: the atmospheric electric field instrument is used for detecting atmospheric electric field parameters of the space to be detected; the radar is used for detecting cloud layer parameters of a cloud layer in the space to be detected; the at least one processor is used for realizing each program and controlling the atmospheric electric field instrument and the radar to carry out detection operation; at least one memory for storing at least one program; the at least one program, when executed by the at least one processor, causes the lightning early warning device to implement any of the methods described above.

According to the thunder early warning method, the atmospheric electric field detection is firstly carried out, the radar is then carried out to detect the cloud layer parameters under the condition that the atmospheric electric field detection meets the preset conditions, on one hand, the thunder early warning whether the early warning target object needs to be subjected to thunder early warning or not is judged more accurately by integrating the atmospheric electric field detection result, the radar detection result on the cloud layer parameters and the geographic parameters of the early warning target object, and on the other hand, the detection efficiency is improved by carrying out the radar detection after the atmospheric electric field detection. In addition, the invention further provides a specific mode of acquiring the cloud layer damage degree coefficient aiming at the early-warning target object based on the cloud layer parameters and the geographic parameters detected by the radar, so that the lightning early-warning judgment of the early-warning target object based on the cloud layer parameters and the geographic parameters is more accurately carried out. The invention also provides a three-level judgment mode aiming at the electric field early warning condition judgment, and provides a corresponding radar scanning mode and a preset license mode of an area or an object needing important early warning respectively based on the three-level judgment mode. The radar scanning modes can be distinguished, so that resources can be saved, and the efficiency can be improved; the preset license mode can provide higher early warning level for areas or objects needing important early warning, more rapid early warning sensitivity and ensure the safety protection effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, and it is apparent that the drawings in the following description only relate to some embodiments of the present invention and are not limiting on the present invention.

Fig. 1 is a schematic diagram of an early warning scene of a lightning early warning device according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of the lightning early warning device shown in fig. 1.

Fig. 3 is a schematic flow chart of a lightning early warning method according to an embodiment of the present invention.

Fig. 4 is a schematic diagram illustrating a relative relationship between cloud layer risk coefficient and echo intensity detected by the radar in the embodiment of fig. 3.

Fig. 5 is a schematic diagram illustrating a relative relationship between the cloud-based risk coefficient and the cloud-based ground height in the embodiment of fig. 3.

Fig. 6 is a schematic diagram illustrating a relative relationship between the cloud layer hazard level coefficient and the distance between the cloud layer and the radar in the embodiment of fig. 3.

Fig. 7 is a schematic flow chart of a lightning early warning method according to another embodiment of the present invention.

FIG. 8 is a schematic diagram of the grading of atmospheric electric field parameters employed in the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.

Fig. 1 illustrates a lightning early warning scenario of a lightning early warning device 800 according to an embodiment of the present invention. The lightning early warning device 800 is used for detecting atmospheric electric field parameters of the space 700 to be detected and cloud layer parameters of the cloud layer 900, so that early warning is carried out on the lightning occurrence condition of the space 700 to be detected. The lightning early warning device 800 provided by this embodiment can perform targeted lightning early warning operation on the early warning target 600 that is determined to need lightning early warning in advance. In the actual early warning operation, the lightning early warning device 800 performs lightning early warning on the early warning target 600 by detecting the atmospheric electric field parameter of the space 700 to be detected and the cloud layer parameter of the cloud layer 900 and according to the geographic parameter of the early warning target 600. On this basis, the lightning early warning device 800 provided by this embodiment further provides an algorithm that can more accurately determine the lightning threat size of the cloud 900 to the early warning target 600, thereby realizing more accurate lightning early warning operation.

The atmospheric electric field parameters of the space 700 to be measured include parameters such as atmospheric electric field strength. Cloud 900 has cloud parameters including: the echo intensity dBz detected by the radar 808, the height H of the cloud 900 from the ground, and the distance L between the cloud 900 and the radar 808. The geographic parameters of the early warning target object 600 include an included angle θ between the connection line of the early warning target object 600 and the radar 808 and the connection line of the cloud center projection point 902 and the radar 808, and a distance S between the early warning target object 600 and the radar 808. The distance S is a predetermined value, and the included angle θ may be obtained by directly detecting the early warning target object 600 through the radar 808 based on the position of the cloud center projection point 902, or may be calculated based on cloud parameters. In this embodiment, the included angle θ is directly detected and obtained by the lightning early warning device 800.

Referring collectively to fig. 2, lightning early warning device 800 includes a processor 802, a memory 804, an atmospheric electric field instrument 806, and a radar 808. The processor 802 is used to implement various programs. Memory 804 is used to store at least one program that, when executed by processor 802, may implement lightning early warning method provided by the present invention by lightning early warning device 800. The atmospheric electric field meter 806 is used for detecting atmospheric electric field parameters of the space 700 to be measured under the control of the processor 802. The radar 808 is used to detect cloud parameters of the cloud 900 under control of the processor 802.

Referring further to fig. 3, a lightning early warning method according to an embodiment of the present invention specifically includes the following steps 102-120.

Step 102, detecting atmospheric electric field parameters of the space 700 to be detected. In this embodiment, the atmospheric electric field instrument 806 shown in fig. 2 may be used to detect the atmospheric electric field parameters of the space 700 to be measured. The atmospheric electric field parameters comprise atmospheric electric field strength and other parameters.

And 104, judging whether the atmospheric electric field parameters reach electric field early warning conditions or not. The electric field early warning condition is a preset atmospheric electric field parameter threshold value. In this embodiment, the atmospheric electric field parameter threshold is set according to past empirical values. In other embodiments, the atmospheric electric field parameter threshold may also be calculated by performing data statistics on the atmospheric parameter threshold over a period of time. The specific way of judging whether the atmospheric electric field parameters reach the electric field early warning condition is as follows: and judging whether the atmospheric electric field parameter is greater than or equal to the atmospheric electric field parameter threshold value. If the atmospheric electric field parameter is greater than or equal to the atmospheric electric field parameter threshold value, an electric field early warning condition is achieved; and if the atmospheric electric field parameter is smaller than the atmospheric electric field parameter threshold value, the atmospheric electric field early warning condition is not reached. If the atmospheric electric field parameter reaches the electric field warning condition, step 106 is entered, and step 114 is entered at the same time. And if the atmospheric electric field parameters do not reach the electric field early warning condition, returning to the step 102. Referring to fig. 8, the atmospheric electric field parameter in the present embodiment is the atmospheric electric field strength. The electric field intensity threshold value is selected to be 1.5kv/m, when the detected atmospheric electric field intensity is greater than or equal to 1.5kv/m, the electric field early warning condition is reached, and when the detected atmospheric electric field intensity is less than 1.5kv/m, the electric field early warning condition is not reached.

And step 106, if the atmospheric electric field parameters reach the electric field early warning condition, starting a radar to scan cloud layer parameters of the space to be measured. In this embodiment, the cloud layer parameters include: the echo intensity dBz detected by the radar 808, the height H of the cloud 900 from the ground, and the distance L between the cloud 900 and the radar 808.

Step 108, determining the geographic parameters of the early warning target object 600. In this embodiment, the geographic parameters include an included angle θ between a connection line of the early warning target object 600 and the radar 808 and a connection line of the cloud center projection point 902 and the radar 808, and a distance S between the early warning target object 600 and the radar 808.

Step 110, based on the cloud layer ginsengThe number and the geographic parameters obtain cloud layer hazard degree coefficients for the early warning target 600. In this embodiment, the functional relationship between the cloud layer risk coefficient and the cloud layer parameter and the geographic parameter isWherein δ is a cloud layer damage program coefficient, k is an empirical parameter, dBz is an echo intensity detected by the radar, H is a cloud layer ground clearance, L is a distance between the cloud layer and the radar, S is a distance between the radar and the early warning target object, and θ is an included angle between the early warning target object and a radar connecting line and a cloud layer central projection point and a radar connecting line. The radar obtains the cloud layer ground clearance H, the echo intensity dBz detected by the radar and the distance L between the cloud layer and the radar through scanning, the distance S is a predetermined numerical value, the included angle theta is obtained through direct detection of the lightning early warning equipment 800, and then the cloud layer hazard degree coefficient delta is obtained through the above functional relation. The larger the echo intensity dBz is, the larger the cloud layer damage degree coefficient is; the smaller the echo intensity dBz is, the smaller the cloud layer damage degree coefficient is; the larger the included angle theta is, the smaller the cloud layer damage degree coefficient is; the smaller the included angle theta is, the larger the cloud layer hazard degree coefficient is.

The functional relationship between the cloud risk coefficient and the cloud parameter can be seen in fig. 4-6. As shown in fig. 4, the higher the echo intensity dBz detected by the radar, the larger the cloud damage program coefficient δ, the higher the probability of occurrence of a lightning stroke and the higher the degree of danger generated upon occurrence of a lightning stroke. When the echo intensity dBz detected by the radar is greater than 45, the probability of occurrence of a lightning stroke is high, and when the echo intensity dBz detected by the radar is greater than 50, the probability of occurrence of a lightning stroke is extremely high. As shown in fig. 5, the lower the cloud ground clearance, the larger the cloud damage program coefficient δ is, which indicates that the threat of lightning strike to the ground object is larger, and the cloud ground clearance range of the general emphasis detection is between 500m and 5000 m. As shown in fig. 6, the shorter the distance between the cloud layer and the radar is, the larger the cloud layer damage coefficient δ is, which indicates that the threat of the lightning strike to the ground object is larger, and the distance between the cloud layer and the radar which is mainly detected is generally in the range of 1km-20 km.

Step 112, judging cloud layer dangerWhether the damage degree coefficient reaches the cloud layer parameter early warning condition or not. If the result of the pre-determination in the pre-determination step 104 is yes, it is continuously determined whether the cloud layer hazard level coefficient reaches the cloud layer parameter early warning condition, and it may be more accurately determined whether the early warning target 600 needs to be subjected to lightning early warning by integrating the detection result of the atmospheric electric field, the detection result of the radar 808 on the cloud layer parameter, and the geographic parameter of the early warning target 600. The specific way of judging whether the cloud layer hazard degree coefficient reaches the cloud layer parameter early warning condition is as follows: judging whether the cloud layer damage degree coefficient delta is larger than or equal to the cloud layer damage degree coefficient threshold delta_iIf the cloud layer damage degree coefficient delta is larger than or equal to the cloud layer damage degree coefficient threshold delta_iIf the cloud layer damage degree coefficient delta is smaller than the cloud layer damage degree coefficient threshold delta, the cloud layer parameter early warning condition is reached_iAnd if not, the cloud layer parameter early warning condition is not reached. And if the cloud layer parameter early warning condition is not met, returning to the step 102. If the cloud layer parameter early warning condition is reached, go to step 114.

And step 114, generating a radar early warning map based on the atmospheric electric field parameters, the cloud layer parameters, the geographic parameters and the cloud layer hazard degree coefficient. The radar early warning map displays the position of the cloud layer 900 and corresponding position parameters, and the position of the early warning target object 600 and corresponding position parameters, and displays the atmospheric electric field parameters on the map to provide more vivid and visual lightning early warning information.

And step 116, pushing an early warning signal. Under the condition that the judgment result of the atmospheric electric field detection in the step 104 based on the preamble is that the electric field early warning condition is satisfied, and the judgment result of the cloud layer detection in the step 112 is that the cloud layer parameter early warning condition is satisfied, the lightning early warning signal is timely pushed to the early warning target object 600 reported in advance in schools, oil depots and the like.

Step 118, determine whether the warning signal needs to be continuously pushed. If a continuous push is required, return to step 116. If continuous pushing is not required, go to step 120.

And step 120, canceling the early warning signal.

Referring to fig. 7, a lightning early warning method according to another embodiment of the present invention specifically includes the following steps 202-228.

Step 202, detecting the atmospheric electric field parameters of the space 700 to be detected. In this embodiment, the atmospheric electric field instrument 806 shown in fig. 2 may be used to detect the atmospheric electric field parameters of the space 700 to be measured. The atmospheric electric field parameters comprise atmospheric electric field strength and other parameters.

And 204, judging whether the atmospheric electric field parameters reach a primary electric field early warning condition. Wherein, the primary electric field early warning condition is a preset primary atmospheric electric field parameter threshold. In this embodiment, the primary atmospheric electric field parameter threshold is set according to past empirical values. In other embodiments, the primary atmospheric electric field parameter threshold may also be calculated by performing data statistics on the primary atmospheric parameter threshold over a period of time. The specific way of judging whether the atmospheric electric field parameter reaches the first-level electric field early warning condition is as follows: and judging whether the atmospheric electric field parameter is greater than or equal to the primary atmospheric electric field parameter threshold value. If the atmospheric electric field parameter is greater than or equal to the primary atmospheric electric field parameter threshold value, a primary electric field early warning condition is achieved; and if the atmospheric electric field parameter is smaller than the primary atmospheric electric field parameter threshold value, the primary electric field early warning condition is not reached. If the atmospheric electric field parameter reaches the first-level electric field warning condition, step 206 is performed, and step 208 is performed at the same time. And if the atmospheric electric field parameters do not reach the first-level electric field early warning condition, returning to the step 202.

Referring to fig. 8, the atmospheric electric field parameter in the present embodiment is the atmospheric electric field strength. The threshold value of the first-level electric field intensity is selected to be 1.5kv/m, when the detected atmospheric electric field intensity is greater than or equal to 1.5kv/m, the first-level electric field early warning condition is achieved, and when the detected atmospheric electric field intensity is less than 1.5kv/m, the first-level electric field early warning condition is not achieved.

And step 206, if the atmospheric electric field parameters reach the first-level electric field early warning condition, starting the radar to periodically scan the cloud layer parameters of the space to be measured at preset time intervals. In this embodiment, the cloud layer parameters include: the echo intensity dBz detected by the radar, the ground clearance H of the cloud layer and the distance L between the cloud layer and the radar.

And step 208, judging whether the atmospheric electric field parameters reach the secondary electric field early warning condition. And the secondary electric field early warning condition is a preset secondary atmospheric electric field parameter threshold value. In this embodiment, the secondary atmospheric electric field parameter threshold is set according to past empirical values. In other embodiments, the secondary atmospheric electric field parameter threshold may also be calculated by performing data statistics on the secondary atmospheric parameter threshold over a period of time. The specific way of judging whether the atmospheric electric field parameter reaches the secondary electric field early warning condition is as follows: and judging whether the atmospheric electric field parameter is greater than or equal to the secondary atmospheric electric field parameter threshold value. If the atmospheric electric field parameter is greater than or equal to the secondary atmospheric electric field parameter threshold value, the secondary electric field early warning condition is reached; and if the atmospheric electric field parameter is smaller than the secondary atmospheric electric field parameter threshold value, the secondary electric field early warning condition is not reached. If the atmospheric electric field parameter reaches the secondary electric field warning condition, step 210 is entered, and step 218 is entered at the same time. And if the atmospheric electric field parameters do not reach the secondary electric field early warning condition, returning to the step 202.

Referring to fig. 8, the secondary electric field strength threshold is selected to be 2kv/m, when the detected atmospheric electric field strength is greater than or equal to 2kv/m, the secondary electric field early warning condition is reached, and when the detected atmospheric electric field strength is less than 2kv/m, the secondary electric field early warning condition is not reached yet.

Step 210, if the atmospheric electric field parameter reaches the secondary electric field early warning condition, the radar is adjusted to be in an uninterrupted scanning mode, and step 212 is entered at the same time.

In step 212, the geographic parameters of the early warning target 600 are determined. In this embodiment, the geographic parameters include an included angle θ between a connection line of the early warning target object 600 and the radar 808 and a connection line of the cloud center projection point 902 and the radar 808, and a distance S between the early warning target object 600 and the radar 808.

Step 214, obtaining a cloud layer hazard degree coefficient for the early warning target object 600 based on the cloud layer parameters and the geographic parameters. In this embodiment, the functional relationship between the cloud layer risk coefficient and the cloud layer parameter and the geographic parameter isWherein, delta is cloud layer damage program coefficient, k is empirical parameter, and dBz is radar detectionH is the height from the ground of the cloud layer, L is the distance between the cloud layer and the radar, S is the distance between the radar and the early warning target object, and θ is the included angle between the early warning target object and the radar connecting line and the cloud layer central projection point and the radar connecting line. The radar obtains the cloud layer ground clearance H, the echo intensity dBz detected by the radar and the distance L between the cloud layer and the radar through scanning, the distance S is a predetermined numerical value, the included angle theta is obtained through direct detection of the lightning early warning equipment 800, and then the cloud layer hazard degree coefficient delta is obtained through the above functional relation. The larger the echo intensity dBz is, the larger the cloud layer damage degree coefficient is; the smaller the echo intensity dBz is, the smaller the cloud layer damage degree coefficient is; the larger the included angle theta is, the smaller the cloud layer damage degree coefficient is; the smaller the included angle theta is, the larger the cloud layer hazard degree coefficient is. The functional relationship between the cloud risk coefficient and the cloud parameter can be seen in fig. 4-6.

And step 216, judging whether the cloud layer damage degree coefficient reaches the cloud layer parameter early warning condition. If the result of the determination in the preamble step 220 is yes, it is continuously determined whether the cloud layer hazard degree coefficient reaches the cloud layer parameter early warning condition, and the atmospheric electric field detection result, the detection result of the radar 808 on the cloud layer parameter and the geographic parameter of the early warning target 600 may be integrated to more accurately determine whether the lightning early warning is required on the early warning target 600. The specific way of judging whether the cloud layer hazard degree coefficient reaches the cloud layer parameter early warning condition is as follows: judging whether the cloud layer damage degree coefficient delta is larger than or equal to a cloud layer damage degree coefficient threshold delta_i. And if the cloud layer parameter early warning condition is not met, returning to the step 202. If the cloud layer parameter warning condition is met, go to step 222.

In step 218, if the atmospheric electric field parameter reaches the secondary electric field warning condition, it is determined whether the pre-set license exists for the pushed warning target object. If yes, go to step 222; if no license is preset, proceed to step 220. The pre-warning target object is an area or an object which needs to monitor the lightning strike condition in a key way, ensures early warning in time, improves the safety protection level, such as schools, gas stations and the like, and can process a preset license at the lightning pre-warning equipment 800. When the atmospheric electric field parameters reach the second-level electric field early warning condition, the early warning judgment program can be carried out, and the early warning judgment program does not need to be started until the third-level electric field early warning condition, so that the early warning level can be improved, the early warning sensitivity is more rapid, and the safety protection effect is ensured.

And step 220, judging whether the atmospheric electric field parameters reach a three-level electric field early warning condition. And the three-level electric field early warning condition is a preset three-level atmospheric electric field parameter threshold value. In this embodiment, the three-level atmospheric electric field parameter threshold is set according to past empirical values. In other embodiments, the three-level atmospheric electric field parameter threshold may also be calculated by performing data statistics on the three-level atmospheric parameter threshold over a period of time. The specific way of judging whether the atmospheric electric field parameter reaches the three-level electric field early warning condition is as follows: and judging whether the atmospheric electric field parameter is greater than or equal to the three-level atmospheric electric field parameter threshold value. If the atmospheric electric field parameter is greater than or equal to the three-level atmospheric electric field parameter threshold value, a three-level electric field early warning condition is achieved; and if the atmospheric electric field parameter is smaller than the three-level atmospheric electric field parameter threshold value, the three-level electric field early warning condition is not reached. If the atmospheric electric field parameter reaches the third-level electric field early warning condition, entering step 222; and if the atmospheric electric field parameters do not reach the three-level electric field early warning condition, returning to the step 202.

Referring to fig. 8, the threshold of the tertiary electric field strength is selected to be 3kv/m, when the detected atmospheric electric field strength is greater than or equal to 3kv/m, the tertiary electric field early warning condition is reached, and when the detected atmospheric electric field strength is less than 3kv/m, the tertiary electric field early warning condition is not reached yet.

And step 222, generating a radar early warning map based on the atmospheric electric field parameter, the cloud layer parameter, the geographic parameter and the cloud layer hazard degree coefficient. The radar early warning map displays the position of the cloud layer 900 and corresponding position parameters, and the position of the early warning target object 600 and corresponding position parameters, and displays the atmospheric electric field parameters on the map to provide more vivid and visual lightning early warning information.

Step 224, pushing the warning signal. And a lightning early warning signal is timely pushed out to the early warning target object 600 based on the judgment result of the atmospheric electric field detection and the judgment result of the cloud layer detection in the preorder step.

Step 226, determine whether the warning signal needs to be continuously pushed. If continuous pushing is required, return to step 224. If continuous push is not required, step 228 is entered.

In step 228, the warning signal is cancelled.

According to the thunder early warning method, the atmospheric electric field detection is firstly carried out, the radar is then carried out to detect the cloud layer parameters under the condition that the atmospheric electric field detection meets the preset conditions, on one hand, the thunder early warning whether the early warning target object needs to be subjected to thunder early warning or not is judged more accurately by integrating the atmospheric electric field detection result, the radar detection result on the cloud layer parameters and the geographic parameters of the early warning target object, and on the other hand, the detection efficiency is improved by carrying out the radar detection after the atmospheric electric field detection. In addition, the invention further provides a specific mode of acquiring the cloud layer damage degree coefficient aiming at the early-warning target object based on the cloud layer parameters and the geographic parameters detected by the radar, so that the lightning early-warning judgment of the early-warning target object based on the cloud layer parameters and the geographic parameters is more accurately carried out. The invention also provides a three-level judgment mode aiming at the electric field early warning condition judgment, and provides a corresponding radar scanning mode and a preset license mode of an area or an object needing important early warning respectively based on the three-level judgment mode. The radar scanning modes can be distinguished, so that resources can be saved, and the efficiency can be improved; the preset license mode can provide higher early warning level for areas or objects needing important early warning, more rapid early warning sensitivity and ensure the safety protection effect.

While the invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that the present invention is not limited to the details of construction and various changes in form and details may be made therein without departing from the spirit and scope of the invention. Accordingly, the scope of the present disclosure is not limited to the above-described embodiments, but should be determined by the claims and the equivalents thereof.