A lightning signal detection device and a lightning alarm system

Abstract

The present invention is applicable to the field of lightning signal detection technology, and provides a lightning signal detection device and a lightning alarm system. The lightning signal detection device includes a sensing unit, including a first sensing module and a second sensing module, the first sensing module is used to obtain a lightning electromagnetic field signal, and the second sensing module is used to sense the distance information of the lightning electromagnetic field signal; a signal feature acquisition unit is connected to the first sensing module, and is used to obtain the peak value of the lightning electromagnetic field signal and obtain the lightning pulse signal feature; a signal processing unit is connected to the signal feature acquisition unit and the second sensing module, and is used to determine whether the lightning pulse signal feature meets the standard lightning pulse signal feature, and determine the location where the lightning strike occurs. This solution can determine the location where the lightning strike occurs according to the lightning electromagnetic field signal and the distance information of the lightning electromagnetic field signal by setting the sensing unit, the signal feature acquisition unit and the signal processing unit, and complete the lightning signal detection, and the structure is simple.

Description

Technical Field

[0001] The invention belongs to the technical field of lightning signal detection, and in particular relates to a lightning signal detection device and a lightning alarm system. Background Art

[0002] Lightning is a natural phenomenon that mostly occurs in summer, more often in mountainous areas than in plains. The discharge time of a lightning strike is less than 1 second, and the return stroke of the main discharge is only in the microsecond range. However, it may cause major natural disasters, such as the destruction of electrical equipment, damage to buildings, and even injury or death to people or livestock. Therefore, it is necessary to detect lightning signals in order to take lightning protection measures.

[0003] Traditional lightning detection alarm devices are usually completed by fixed weather stations or medium-sized, non-portable equipment. People who often live in remote areas with few people, such as high mountains and dense forests, cannot obtain information from weather stations in a timely manner.

[0004] It can be seen that a lightning signal detection device is needed to solve the problem that large lightning detection equipment in the prior art is inconvenient to carry. Summary of the invention

[0005] The purpose of the embodiment of the present invention is to provide a lightning signal detection device, aiming to solve the problem that large-scale lightning detection equipment in the prior art is inconvenient to carry.

[0006] The embodiment of the present invention is implemented as follows: the lightning signal detection device comprises:

[0007] The sensing unit includes a first sensing module and a second sensing module, wherein the first sensing module is used to obtain a lightning electromagnetic field signal, and the second sensing module is used to obtain distance information between the lightning electromagnetic field signal and the lightning signal detection device;

[0008] A signal characteristic acquisition unit connected to the first sensing module, the signal characteristic acquisition unit is used to acquire the peak value of the lightning electromagnetic field signal and acquire the lightning pulse signal characteristic according to the lightning electromagnetic field signal;

[0009] The signal processing unit is connected to the signal characteristic acquisition unit and the second sensing module respectively, and the signal processing unit is used to determine whether the lightning pulse signal characteristic conforms to the standard lightning pulse signal characteristic and determine the location where the lightning strike occurs.

[0010] Another object of an embodiment of the present invention is to provide a lightning alarm system, the lightning alarm system comprising an alarm device and the above-mentioned lightning signal detection device;

[0011] The lightning signal detection device is used to determine the lightning alarm information and send the lightning alarm information to the alarm device;

[0012] The alarm device comprises a receiving unit, and the alarm device is used to receive the lightning alarm information and issue an alarm.

[0013] The scheme of the present invention is provided with a sensing unit, a signal feature acquisition unit and a signal processing unit. The sensing unit can acquire a lightning electromagnetic field signal and distance information of the lightning electromagnetic field signal. The signal feature acquisition unit can convert the lightning electromagnetic field signal into a lightning pulse signal. Then, the signal processing unit determines the azimuth of the lightning strike according to the lightning pulse signal, and determines the distance of the lightning strike from the lightning detection device according to the distance information of the lightning electromagnetic field signal, thereby completing the detection of the lightning strike location. The scheme has a simple structure and is flexible to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A structural block diagram of a lightning signal detection device provided by an embodiment of the present invention;

[0015] Figure 2 A circuit diagram of a signal feature acquisition unit connected to a sensing unit provided by an embodiment of the present invention;

[0016] Figure 3 A circuit connection diagram of a signal processing unit for acquiring lightning pulse signal characteristics provided by an embodiment of the present invention;

[0017] Figure 4 A schematic structural diagram of a lightning alarm device provided with a sending unit provided in an embodiment of the present invention;

[0018] Figure 5 A schematic structural diagram of a lightning alarm system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0021] like Figure 1-3 As shown, it is a structural diagram of a lightning signal detection device provided by an embodiment of the present invention, comprising:

[0022] The sensing unit includes a first sensing module and a second sensing module, wherein the first sensing module is used to obtain a lightning electromagnetic field signal, and the second sensing module is used to obtain distance information between the lightning electromagnetic field signal and the lightning signal detection device;

[0023] A signal characteristic acquisition unit connected to the first sensing module, the signal characteristic acquisition unit is used to acquire the peak value of the lightning electromagnetic field signal and acquire the lightning pulse signal characteristic according to the lightning electromagnetic field signal;

[0024] The signal processing unit is connected to the signal characteristic acquisition unit and the second sensing module respectively, and the signal processing unit is used to determine whether the lightning pulse signal characteristic conforms to the standard lightning pulse signal characteristic and determine the location where the lightning strike occurs.

[0025] In the embodiment of the present invention, the lightning signal detection device has a simple structure and a small volume, and can be set on an engineering vehicle or installed in an open area. The first sensing unit can be an orthogonal magnetoresistive sensor, which includes a first magnetoresistive sensor and a second magnetoresistive sensor. The first magnetoresistive sensor and the second magnetoresistive sensor are arranged perpendicular to each other. For example, the setting direction of the first magnetoresistive sensor is the X-axis, the setting direction of the second magnetoresistive sensor is the Y-axis, and the plane formed by the X-axis and the Y-axis is the horizontal plane. The lightning electromagnetic field signal obtained by the first sensing module is the electromagnetic field signal of the lightning return at the horizontal plane, and the first magnetoresistive sensor and the second magnetoresistive sensor respectively obtain the lightning electromagnetic field signals in mutually perpendicular directions. The second sensing module can be a medium wave antenna (500K), and the distance information of the lightning electromagnetic field signal sensed by the second sensing module is the distance information of the lightning strike from the second sensing module in the plane formed by the X-axis and the Y-axis. In the embodiment of the present invention, since the distance between the location where the lightning strike is generated and the lightning signal detection device is relatively far, the distance difference between the first sensing module and the second sensing module and the height difference relative to the horizontal plane can be ignored.

[0026] In an embodiment of the present invention, the signal feature acquisition unit may include an operational amplifier module, a power division module, a comparison module and a peak acquisition module, wherein the operational amplifier module includes a first operational amplifier and a second operational amplifier, the first operational amplifier and the second operational amplifier are respectively connected to the first magnetoresistance sensor and the second magnetoresistance sensor, and are used to amplify the electromagnetic field signal acquired by the first magnetoresistance sensor and the second magnetoresistance sensor; the power division module includes a first power divider and a second power divider, and the lightning electromagnetic field signal amplified by the first operational amplifier is respectively connected to the first power divider and the second power divider, and is divided into 4 paths through the first power divider and the second power divider; the comparison module includes a first comparator, a second comparator and a third comparator, wherein one input end of the first comparator is connected to the pulse starting point reference, and the other input end is connected to the X2 output end of the first power divider, one input end of the second comparator is connected to the X1 output end of the first power divider, one input end of the third comparator is connected to the X1 output end of the second comparator, and the second The X2 output of the comparator is connected to the first bandpass filter, the other input of the second comparator and the other input of the third comparator are respectively connected to the output of the first bandpass filter, the output of the first comparator and the output of the second comparator are connected to the AND gate to obtain the lower edge pulse of the lightning pulse, the output of the first comparator and the output of the third comparator are connected to the AND gate to obtain the upper edge pulse of the lightning pulse signal, and the output of the first comparator is connected to the NOT gate to output the count reset signal; the peak acquisition module may include a first bandpass filter, a sample holder and a second bandpass filter, the output of the first bandpass filter outputs the first peak value of the lightning electromagnetic field signal received by the first magnetoresistance sensor, and this embodiment does not limit the specific circuit composition of the sample holder, one input of the sample holder is connected to the second operational amplifier, the other input is connected to the peak trigger signal and the output of the third comparator, and the output of the sample holder is connected to the second bandpass filter to output the second peak value of the lightning electromagnetic field signal received by the second magnetoresistance sensor. Thus, the lightning electromagnetic field signal obtains the upper edge pulse and the lower edge pulse of the lightning pulse signal, as well as the first peak value and the second peak value of the lightning electromagnetic field signal through the signal feature acquisition unit.

[0027] In an embodiment of the present invention, the signal processing unit may be a processor, and the signal processing unit is connected to the comparison module and the peak acquisition module of the signal feature acquisition unit through a counting module and a data acquisition module respectively, wherein the counting module includes a first counter and a second counter, the falling edge pulse signal and the 10MHZ clock source are connected to the U / D pin of the first counter through an AND gate, the rising edge pulse signal and the 10MHZ clock source are connected to the U / D pin of the second counter through an AND gate, the Reset pins of the first counter and the second counter input the counting reset signal, the carry pins (▷) of the first counter and the second counter are connected to the 20MHZ clock source, and the output pins B1-B8 of the first counter and the second counter are all connected to the signal processing unit; the data acquisition module includes a first analog / digital converter and a second analog / digital converter, the Vin pin of the first analog / digital converter inputs the lightning pulse peak signal, the Vin pin of the second analog / digital converter inputs the peak signal of the orthogonal signal, and the output pins B1-B8 of the first analog / digital converter and the second analog / digital converter are also all connected to the signal processing unit. The signal processing unit obtains the rising edge pulse and the falling edge pulse characteristics of the lightning pulse signal to determine whether the lightning pulse signal meets the characteristic parameters corresponding to the standard lightning signal (by comparing the obtained lightning pulse signal characteristics with the characteristic parameters corresponding to the standard lightning signal). When the characteristics of the obtained lightning pulse signal meet the corresponding characteristic parameters of the standard lightning signal, the signal processing unit can calculate the azimuth of the lightning signal in the plane formed by the first magnetoresistance sensor and the second magnetoresistance sensor corresponding to the X-axis and the Y-axis respectively according to the first peak value and the second peak value of the orthogonal magnetic field obtained by the orthogonal magnetoresistance sensor. The signal processing unit then determines the distance of the lightning signal from the second sensing module in the plane formed by the first magnetoresistance sensor and the second magnetoresistance sensor corresponding to the X-axis and the Y-axis respectively according to the distance information of the lightning electromagnetic field signal obtained by the second sensing module, thereby determining the location where the lightning strike occurs. The location where the lightning strike occurs refers to the position of the first magnetoresistance sensor and the second magnetoresistance sensor relative to the lightning signal detection device in the plane formed by the X-axis and the Y-axis respectively.

[0028] A lightning signal detection device provided by an embodiment of the present invention, by setting a sensing unit, a signal feature acquisition unit and a signal processing unit, the sensing unit can acquire a lightning electromagnetic field signal and distance information of the lightning electromagnetic field signal, the signal feature acquisition unit can convert the lightning electromagnetic field signal into a lightning pulse signal, and then the signal processing unit determines the azimuth of the lightning strike according to the first peak value and the second peak value of the orthogonal magnetic field obtained by the orthogonal magnetoresistance sensor, and determines the distance of the lightning strike from the lightning detection device according to the distance information of the lightning electromagnetic field signal, thereby completing the detection of the lightning strike location, the structure is simple, and the use is flexible.

[0029] In another embodiment of the present invention, the signal processing unit is further used to obtain the centroid position of the lightning discharge through a clustering algorithm according to the position information of the lightning strike within a preset time, and determine the lightning alarm information according to the change trend of the centroid position.

[0030] In an embodiment of the present invention, the lightning alarm information may be alarm information about the time when the centroid position of the lightning discharge arrives at the lightning signal detection device. For example, if it is judged based on the changing trend of the centroid position of the lightning discharge that the time when the centroid position of the lightning discharge arrives at the lightning signal detection device is within 30 minutes to 20 minutes, the corresponding lightning alarm information may be a yellow warning. When it is judged that the time when the centroid position of the lightning discharge arrives at the lightning signal detection device is within 20 minutes to 10 minutes, the corresponding lightning alarm information may be an orange warning. When it is judged that the time when the centroid position of the lightning discharge arrives at the lightning signal detection device is within 10 minutes, the corresponding lightning alarm information may be a red warning. Within a preset time (this embodiment does not limit the specific duration of the preset time), the signal processing unit can obtain the position information of multiple lightning strikes. The position information of these lightning strikes is discrete, and a clustering algorithm can be used to find the centroid of discrete points at the position with the maximum density. By obtaining the centroid positions of multiple lightning discharges, the changing trend of the centroid position can be obtained according to the extrapolation method. The moving speed of the centroid position can be determined according to the changing trend of the centroid position, so as to judge the time when the centroid position of the lightning discharge reaches the lightning signal detection device, and thus the lightning alarm information can be determined.

[0031] In the embodiment of the present invention, Figure 4 As shown, the lightning signal detection device may further include a sending unit, which is connected to the signal processing unit, and the sending unit is used to send the lightning alarm information to the alarm device. The embodiment of the present invention does not limit the specific type of the sending unit. The signal processing unit transmits the lightning alarm information to the sending unit, and the sending unit then sends the lightning alarm information to the alarm device so that the alarm device issues an alarm after receiving the corresponding lightning alarm signal. The sending unit and the alarm device may be electrically connected or wirelessly connected. The alarm device may include an indicator light and / or a buzzer, but is not limited thereto. When the alarm device receives the lightning alarm signal, the indicator light and / or the buzzer may be controlled to work. For example, three different colors of indicator lights, yellow, orange, and red, may be provided on the alarm device, and indicator lights of different colors correspond to different lightning alarm signals.

[0032] A lightning signal detection device provided by an embodiment of the present invention can obtain the centroid position of lightning discharge through a clustering algorithm based on the position information of multiple lightning strikes, and determine lightning alarm information based on the change trend of the centroid position, so that users can take lightning protection measures in advance based on the lightning alarm information. The lightning signal detection device can be provided with a sending unit, so that the sending unit is connected to the signal processing unit, so that the sending unit can send the lightning alarm information to the alarm device, so that people can accurately and quickly obtain lightning information through their senses.

[0033] like Figure 5 As shown, in another embodiment of the present invention, a lightning alarm system is provided, the lightning alarm system comprising an alarm device and the above-mentioned lightning signal detection device;

[0034] The lightning signal detection device is used to determine lightning alarm information and send the lightning alarm information to the alarm device;

[0035] The alarm device comprises a receiving unit, and the alarm device is used to receive the lightning alarm information and issue an alarm.

[0036] In an embodiment of the present invention, the lightning alarm information may be alarm information about the time when the centroid position of the lightning discharge reaches the lightning signal detection device. For example, according to the change trend of the centroid position of the lightning discharge, it is judged that the time when the centroid position of the lightning discharge reaches the lightning signal detection device is within 30 minutes to 20 minutes, and the corresponding lightning alarm information may be a yellow warning. When it is judged that the time when the centroid position of the lightning discharge reaches the lightning signal detection device is within 20 minutes to 10 minutes, the corresponding lightning alarm information may be an orange warning. When it is judged that the centroid position of the lightning discharge reaches the lightning signal detection device within 10 minutes, the corresponding lightning alarm information may be a red warning. Within a certain period of time, the signal processing unit can obtain the position information of multiple lightning strikes, and the position information of these lightning strikes is discrete. The clustering algorithm can be used to find the centroid of the discrete points of the maximum density position. By obtaining the centroid positions of multiple lightning discharges, the change trend of the centroid position can be obtained according to the extrapolation method. The moving speed of the centroid position can be determined according to the change trend of the centroid position, so as to judge the time when the centroid position of the lightning discharge reaches the lightning signal detection device, and thus the lightning alarm information can be determined.

[0037] In an embodiment of the present invention, the receiving unit in the lightning alarm device is connected to the sending unit in the lightning signal detection device. This embodiment does not limit the specific connection method between the receiving unit and the sending unit. Preferably, the receiving unit and the sending unit can be connected via a wireless network, so that the staff can carry the lightning alarm device with them for easy use. The lightning signal detection device can also include an alarm control unit and an alarm unit. The alarm control unit is connected to the alarm unit. The alarm unit can be an indicator light, a buzzer or a vibrator. When the alarm device is configured to be carried by the staff, preferably, the alarm unit can include a buzzer and a vibrator. For example, when the receiving unit receives the lightning alarm information, the alarm control unit can control the buzzer to emit an alarm sound and control the vibrator to vibrate. The buzzer can be set to emit different sounds and the vibrator can be set to emit different vibration frequencies corresponding to different lightning alarm levels. The staff can quickly respond to the alarm level according to the buzzer sound and the vibration frequency of the vibrator.

[0038] A lightning alarm system provided by an embodiment of the present invention includes a lightning signal detection device and an alarm device. The lightning signal detection device includes a sensing unit, a signal feature acquisition unit, and a signal processing unit. The lightning signal detection device has a simple structure and a small size. The lightning signal detection device can determine the time when the center of mass position of the lightning discharge reaches the lightning signal detection device, thereby determining the lightning alarm information, and can send the lightning alarm information to the alarm device. The alarm device can emit an alarm sound and vibration according to different lightning alarm information, and the staff can quickly know the lightning alarm level and take lightning protection measures in time. The sending unit of the lightning signal detection device and the receiving unit of the alarm device can be connected through a wireless network. The lightning signal detection device can be installed on an engineering vehicle or an open area, and the alarm device can be carried by the staff. In this way, the staff carrying the alarm device can move freely within the coverage of the wireless network, thereby improving the flexibility of the use of the lightning alarm system.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lightning signal detection device, characterized in that: The lightning signal detection device comprises: The sensing unit includes a first sensing module and a second sensing module, wherein the first sensing module is used to obtain a lightning electromagnetic field signal, and the second sensing module is used to obtain distance information between the lightning electromagnetic field signal and the lightning signal detection device; A signal characteristic acquisition unit connected to the first sensing module, the signal characteristic acquisition unit is used to acquire the peak value of the lightning electromagnetic field signal, and acquire the lightning pulse signal characteristic according to the lightning electromagnetic field signal; A signal processing unit, connected to the signal feature acquisition unit and the second sensing module respectively, the signal processing unit is used to determine whether the lightning pulse signal feature meets the standard lightning pulse signal feature and determine the location where the lightning strike occurs; The first sensing module is an orthogonal magnetoresistive sensor; The signal feature acquisition unit comprises: An operational amplifier module, connected to the orthogonal magnetoresistive sensor, for amplifying the lightning electromagnetic field signal; wherein the operational amplifier module comprises a first operational amplifier and a second operational amplifier, and the first operational amplifier and the second operational amplifier are connected to the first magnetoresistive sensor and the second magnetoresistive sensor respectively; A power division module is connected to the operational amplifier module and is used to divide one of the amplified electromagnetic field signals of the orthogonal magnetoresistive sensor; wherein the power division module includes a first power divider and a second power divider, and the lightning electromagnetic field signal amplified by the first operational amplifier is respectively connected to the first power divider and the second power divider, and is divided into four paths by the first power divider and the second power divider; A comparison module, connected to the power division module, for obtaining the rising edge pulse and the falling edge pulse of the lightning pulse signal; wherein the comparison module includes a first comparator, a second comparator and a third comparator, wherein one input end of the first comparator is connected to the pulse starting point reference, and the other input end is connected to the X2 output end of the first power divider, one input end of the second comparator is connected to the X1 output end of the first power divider, one input end of the third comparator is connected to the X1 output end of the second comparator, the X2 output end of the second comparator is connected to the first band-pass filter, the other input end of the second comparator and the other input end of the third comparator are respectively connected to the output end of the first band-pass filter, the output end of the first comparator and the output end of the second comparator are connected to an AND gate to obtain the falling edge pulse of the lightning pulse, and the output end of the first comparator and the output end of the third comparator are connected to an AND gate to obtain the rising edge pulse of the lightning pulse signal; and A peak value acquisition module, connected to the operational amplifier module and the power division module respectively, for acquiring a first peak value and a second peak value of the lightning electromagnetic field signal; The comparison module is connected to the signal processing unit through the counting module; wherein the signal processing unit compares the rising edge pulse and the falling edge pulse characteristics of the lightning pulse signal with the characteristic parameters corresponding to the standard lightning signal to determine whether the lightning pulse signal meets the characteristic parameters corresponding to the standard lightning signal; The peak value acquisition module is connected to the signal processing unit through a data acquisition module.

2. A lightning signal detection device according to claim 1, characterized in that: The signal processing unit is also used to obtain the centroid position of the lightning discharge through a clustering algorithm according to the position information of the lightning strike within a preset time, and determine the lightning alarm information according to the change trend of the centroid position.

3. A lightning signal detection device according to claim 2, characterized in that: The lightning signal detection device also includes a sending unit: The sending unit is connected to the signal processing unit, and the sending unit is used to send the lightning warning information to the warning device.

4. A lightning signal detection device according to claim 1, characterized in that: The second sensing module is a medium wave antenna.

5. A lightning warning system, characterized in that: The lightning alarm system comprises an alarm device and a lightning signal detection device as claimed in claim 3; The lightning signal detection device is used to determine lightning alarm information and send the lightning alarm information to the alarm device; The alarm device comprises a receiving unit, and the alarm device is used to receive the lightning alarm information and issue an alarm.

6. A lightning warning system according to claim 5, characterized in that: The alarm device also includes an alarm control unit and an alarm unit; The alarm control unit is connected to the receiving unit, and is used to control the alarm unit to issue an alarm according to the lightning alarm information.

7. A lightning warning system according to claim 5, characterized in that: The sending unit and the receiving unit in the lightning signal detection device are connected via a wireless network.

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