Lightning signal simulation system

Abstract

The invention discloses a lightning signal simulation system which comprises an upper computer, a lightning signal simulation device and an unmanned aerial vehicle. The lightning signal simulation device comprises a communication module, a first control unit, a power amplifier unit and an antenna. The first control unit is used for receiving a configuration command of an upper computer through the communication module and generating a lightning simulation signal in response to the configuration command; the unmanned aerial vehicle comprises a second control unit, a fuselage and at least two flight drivers, and the second control unit is used for receiving the control instruction of the unmanned aerial vehicle controller, responding to the control instruction and controlling the flight drivers to work so as to control the unmanned aerial vehicle to fly. As the whole lightning signal simulation device is carried on the unmanned aerial vehicle, the lightning signal simulation device can emit the lightning simulation signal at a required position in the sky according to the control of the upper computer, so that the detection of the lightning simulation signal is more in line with a real scene, and the signal simulation is more flexible. And the evaluation result of the positioning precision of the lightning surveying and mapping array on the cloud flashover is more accurate.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of lightning simulation, and in particular to a lightning signal simulation system. Background Art

[0002] During the simulation test of the lightning signal simulation system, it is necessary to evaluate the positioning accuracy of the lightning mapping array for cloud flashes. Most of the lightning signal simulation devices of the current lightning signal simulation system use a fixed method to release signals, which makes the signal release of the lightning signal simulation system inflexible and the evaluation of the positioning accuracy of the lightning mapping array for cloud flashes inaccurate. Summary of the invention

[0003] The purpose of the embodiments of the present invention is to at least provide a lightning signal simulation system, which can at least solve the problem that the existing lightning signal simulation devices are not flexible enough to use, at least make the position of releasing the lightning simulation signal of the lightning signal simulation device more flexible, and improve the positioning accuracy of the lightning mapping array for cloud flashes.

[0004] To solve the above technical problems, at least one embodiment of the present application provides a lightning signal simulation system, including a host computer, a lightning signal simulation device and a drone;

[0005] The lightning signal simulation device includes a communication module, a first control unit, a power amplifier unit and an antenna;

[0006] The communication module is used to realize wireless communication between the host computer and the first control unit;

[0007] The first control unit is used to receive a configuration command of the host computer through the communication module, generate a lightning simulation signal in response to the configuration command, and feed back output information to the host computer through the communication module each time the antenna transmits the lightning simulation signal;

[0008] The power amplifier unit is used to amplify the lightning simulation signal and transmit it to the antenna;

[0009] The antenna is used to transmit the amplified lightning simulation signal;

[0010] The UAV includes a fuselage, a second control unit and at least two flight drives. The lightning signal simulation device is installed on the fuselage of the UAV. The second control unit is electrically connected to each of the flight drives. The second control unit is used to receive control instructions from the UAV controller and control each of the flight drives to operate in response to the control instructions so as to control the flight of the UAV.

[0011] In one embodiment, the antenna is configured to be foldable, and the height of the end of the folded antenna is greater than the height of the bottom of the drone.

[0012] In one embodiment, the lightning signal simulation device also includes a folding drive, the first control unit is electrically connected to the folding drive, and the folding drive is connected to the antenna drive, the second control unit is also used to receive a take-off command or a landing command from a drone controller, and control each flight drive to operate in response to the take-off command or the landing command, and the first control unit is also used to control the folding drive to drive the antenna to unfold when the drone takes off, and to control the folding drive to drive the antenna to fold when the drone lands.

[0013] In one of the embodiments, the second control unit is used to receive flight trajectory information of the drone controller, and control the operation of each flight driver according to the flight trajectory information, so that the drone flies according to a preset flight trajectory.

[0014] In one of the embodiments, the first control unit is used to feed back the output information to the host computer once through the communication module within a first preset time after the antenna transmits the lightning simulation signal once.

[0015] In one of the embodiments, the first control unit is further used to send status information to the host computer through the communication module at intervals of a second preset time, wherein the status information includes time information, location information of the lightning signal simulation device, signal configuration data and AD data.

[0016] In one of the embodiments, the first control unit includes a main control module, a Beidou module, a signal generation module, a radio frequency switch module and a detection module;

[0017] The main control module is connected to the signal generation module, the radio frequency switch module and the detection module;

[0018] The main control module is used to receive the configuration command of the host computer through the communication module, and control the signal generation module to work in response to the configuration command;

[0019] The signal generating module is used to generate the lightning simulation signal under the control of the main control module;

[0020] The RF switch module has a first channel and a second channel. The input end of the RF switch module is connected to the signal generation module, the first channel is connected to the power amplifier unit, and the second channel is connected to the detection module. Under the control of the control module, the RF switch module opens the first channel and closes the second channel to transmit the lightning simulation signal generated by the signal generation module to the power amplifier unit, or opens the second channel and closes the first channel to transmit the lightning simulation signal generated by the signal generation module to the detection module.

[0021] The detection module is used to detect the radio frequency power of the lightning simulation signal, convert it into a measurable voltage value, and transmit it to the main control module;

[0022] The Beidou module is used to obtain position information and time information, and provide the position information and the time information to the main control module.

[0023] In one of the embodiments, a lightning mapping and detection device is further included, wherein the lightning mapping and detection device is used to detect the lightning simulation signal emitted by the lightning signal simulation device, and calculate the cloud-flash detection efficiency based on the detected lightning simulation signal.

[0024] In one embodiment, the lightning mapping and detection device comprises a lightning mapping array, and the lightning mapping array comprises a plurality of lightning sensors or lightning receivers arranged in an array.

[0025] In one embodiment, the cloud flash detection efficiency DE IC The calculation method of (%) is as follows:

[0026]

[0027] Among them, N ic_conf is the number of lightning simulation signals emitted by the lightning signal simulation device; N ic det The number of corresponding cloud flashes detected by the lightning mapping and detection device.

[0028] Compared with the prior art, the lightning signal simulation system provided by the embodiments of the present application has a lightning signal simulation device that is mounted on a drone as a whole. Therefore, the lightning signal simulation device can transmit lightning simulation signals at a required position in the sky according to the control of a host computer, so that the detection of lightning simulation signals is more in line with real scenes and the signal simulation is more flexible. Due to the flexible characteristics of the drone, the evaluation of the positioning accuracy of the lightning mapping array for cloud flashes can be carried out at multiple different positions, so that the evaluation results are more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0030] Figure 1 A system logic block diagram of a lightning signal simulation system in one embodiment;

[0031] Figure 2A is a logic block diagram of a first control unit provided in one embodiment;

[0032] Figure 2B is a logic block diagram of a first control unit provided in another embodiment;

[0033] Figure 2C is a system block diagram of a lightning signal simulation device provided by an implementation method;

[0034] Figure 3 is a circuit schematic diagram of a signal generating module provided in an embodiment;

[0035] Figure 4 This is the 1pps and TOD timing diagram. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the embodiments of the present invention, many technical details are provided to enable readers to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present invention can be implemented.

[0037] Embodiment 1:

[0038] The embodiments of the present invention relate to a lightning signal simulation system. Compared with the prior art, the embodiments of the present invention are such that, since the lightning signal simulation device is integrally mounted on an unmanned aerial vehicle, the lightning signal simulation device can transmit a lightning simulation signal at a desired position in the sky under the control of a host computer, so that the detection of the lightning simulation signal is more in line with the real scene, and the signal simulation is more flexible. Due to the flexible characteristics of the unmanned aerial vehicle, the evaluation of the positioning accuracy of the lightning mapping array for cloud flashes can be performed at multiple different positions, so that the evaluation result is more accurate.

[0039] The implementation details of this implementation are described in detail below. The following content is only provided for easy understanding of the implementation details and is not necessary for implementing this solution.

[0040] The embodiment of the present invention provides a lightning signal simulation system, such as Figure 1 As shown, it includes: a host computer, a lightning signal simulation device and a UAV;

[0041] The lightning signal simulation device includes a communication module, a first control unit, a power amplifier unit and an antenna;

[0042] The communication module is used to realize wireless communication between the host computer and the first control unit;

[0043] The first control unit is used to receive a configuration command of the host computer through the communication module, generate a lightning simulation signal in response to the configuration command, and feed back output information to the host computer through the communication module each time the antenna transmits the lightning simulation signal;

[0044] The power amplifier unit is used to amplify the lightning simulation signal and transmit it to the antenna;

[0045] The antenna is used to transmit the amplified lightning simulation signal;

[0046] The UAV includes a fuselage, a second control unit and at least two flight drives. The lightning signal simulation device is installed on the fuselage of the UAV. The second control unit is electrically connected to each of the flight drives. The second control unit is used to receive control instructions from the UAV controller and control each of the flight drives to operate in response to the control instructions so as to control the flight of the UAV.

[0047] In this embodiment, the communication module of the host computer and the lightning signal simulation device can perform wireless communication, thereby enabling the host computer and the lightning signal simulation device to communicate remotely. The lightning signal simulation device is installed on the fuselage of the drone, wherein the communication module, the first control unit and the power amplifier unit are all arranged on the outside of the fuselage, and the antenna is arranged on the outside of the fuselage so that the antenna can transmit the lightning simulation signal to the outside.

[0048] Specifically, a data transmitter is provided on the host computer, and the data transmitter is used for wireless communication with the communication module of the lightning signal simulation device. The host computer can send a configuration command to the lightning signal simulation device through the data transmitter, so that the lightning signal simulation device generates a lightning simulation signal and transmits it to the outside through an antenna installed on the drone.

[0049] The drone controller is connected to the second control unit of the drone by wireless communication. In one embodiment, a drone communication unit is provided on the drone, and the drone communication unit and the drone controller are connected by wireless network. In this way, the drone controller can send control instructions for controlling the flight of the drone to the second control unit through the drone communication unit, and the second control unit responds to the control instructions to control the flight of the drone. The control of the drone can include height control, speed control, and direction control, and these controls can be achieved by controlling the flight drive on the drone. For example, the drone is equipped with at least two propellers, and the number of flight drives is the same as the number of propellers, and each flight drive drives one propeller. In this way, the second control unit controls the rotation speed of each propeller respectively, which can realize the control of the height, speed and direction of the drone. It is worth mentioning that the control of each propeller of the drone to achieve the control of height, speed and direction can be realized by using existing technology, and this is not described in detail in this embodiment.

[0050] In this embodiment, compared with the prior art, since the lightning signal simulation device is mounted on the drone as a whole, the lightning signal simulation device can transmit lightning simulation signals at the required position in the sky according to the control of the host computer, so that the detection of lightning simulation signals is more in line with the real scene, and the signal simulation is more flexible. Due to the flexible characteristics of the drone, the evaluation of the positioning accuracy of the lightning mapping array for cloud flashes can be carried out at multiple different positions, making the evaluation result more accurate.

[0051] In order to make the lightning signal simulation device more flexible to use and facilitate the parking of the drone, in one embodiment, the antenna is configured to be foldable, and the height of the end of the folded antenna is greater than the height of the bottom of the drone.

[0052] In this embodiment, the antenna is foldable. The antenna can be retracted by folding and can also be unfolded. In this way, when the drone lands or touches the ground, the antenna can be retracted by folding, so that the height of the end of the antenna is greater than the height of the bottom of the drone, thereby preventing the antenna from touching the ground.

[0053] In one embodiment, the antenna uses a four-arm array antenna, and the four arms are respectively arranged under the drone of the antenna, and the radiation array is perpendicular to the drone and the ground. The antenna array is adjustable from 20cm to 80cm according to the length of the required frequency band. Two antennas are used to switch the communication of the far area 50km to 60km from the antenna and the communication 1km directly below the antenna, respectively, to provide coverage. The correspondence between the antenna array length and the frequency, and the switching of the two antennas in the near and far areas are set and adjusted by the first control unit or the control software on the host computer.

[0054] In order to enable the lightning signal simulation device to accurately transmit signals during use and facilitate the parking of the drone, in one embodiment, the lightning signal simulation device also includes a folding drive, the first control unit is electrically connected to the folding drive, and the folding drive is connected to the antenna drive, the second control unit is also used to receive a take-off command or a landing command from the drone controller, and control each of the flight drives to operate in response to the take-off command or the landing command, and the first control unit is also used to control the folding drive to drive the antenna to unfold when the drone takes off, and to control the folding drive to drive the antenna to fold when the drone lands.

[0055] In this embodiment, the user can send take-off instructions and landing instructions to the drone through the drone controller, where the take-off instruction is used to instruct the drone to take off, and the landing instruction is used to instruct the drone to land. When the drone takes off, the first control unit controls the folding driver to drive the antenna to unfold, which is conducive to radiating signals outward. When the drone lands, the first control unit controls the folding driver to drive the antenna to fold and retract, which is conducive to the smooth landing of the drone.

[0056] In one embodiment, the second control unit is used to receive flight trajectory information of the drone controller, and control each of the flight drivers to operate according to the flight trajectory information, so that the drone flies according to a preset flight trajectory.

[0057] In this embodiment, the preset flight trajectory can be set in advance, and the user can plan the flight route in advance, store the geographic coordinates and altitude information of the pre-planned flight route, form a preset flight trajectory, and record it in the flight trajectory information. In this way, the drone controller sends the flight trajectory information to the second control unit, and the second control unit can fly according to the geographic coordinates and altitude information recorded in the flight trajectory information, thereby realizing the drone flying according to the preset flight trajectory. In this way, the location where the lightning signal simulation is generated can be planned more flexibly.

[0058] In one embodiment, the first control unit is used to feed back the output information to the host computer once through the communication module within a first preset time after the antenna transmits the lightning simulation signal once.

[0059] In this embodiment, the output information is used to feedback the successful output of the lightning simulation signal. After the antenna successfully transmits a lightning simulation signal, the first control unit feeds back the output information to the host computer. After the host computer receives the output information, it confirms that the lightning simulation device transmits a lightning simulation signal. If the antenna fails to successfully transmit the lightning simulation signal, the first control unit does not feed back the output information to the host computer. In this way, the host computer and the management personnel can promptly know whether the lightning signal simulation device successfully transmits the lightning simulation signal.

[0060] In one embodiment, the first control unit is further used to send status information to the host computer through the communication module at every second preset time interval, wherein the status information includes time information, location information of the lightning signal simulation device, signal configuration data and AD data.

[0061] In this embodiment, the status information records various states of the lightning signal simulation device, such as time information, location information, signal configuration data and AD data. In this embodiment, the lightning signal simulation device also includes a positioning module, for example, the positioning module includes a Beidou module. In this embodiment, the Beidou module is TAU3101. The lightning signal simulation device obtains the real-time location information and time information of the UAV and the lightning signal simulation device through the Beidou module. In addition, in some embodiments, the Beidou module is also used to provide 1PPS pulses, for example, to provide 1PPS pulses to the main control module of the first control unit.

[0062] In one embodiment, Figure 2A As shown, the first control unit includes a main control module, a Beidou module, a signal generation module, a radio frequency switch module and a detection module;

[0063] The main control module is connected to the Beidou module, the signal generation module, the RF switch module and the detection module;

[0064] The main control module is used to receive the configuration command of the host computer through the communication module, and control the signal generation module to work in response to the configuration command;

[0065] The signal generating module is used to generate the lightning simulation signal under the control of the main control module;

[0066] The RF switch module has a first channel and a second channel. The input end of the RF switch module is connected to the signal generation module, the first channel is connected to the power amplifier unit, and the second channel is connected to the detection module. Under the control of the control module, the RF switch module opens the first channel and closes the second channel to transmit the lightning simulation signal generated by the signal generation module to the power amplifier unit, or opens the second channel and closes the first channel to transmit the lightning simulation signal generated by the signal generation module to the detection module.

[0067] The detection module is used to detect the radio frequency power of the lightning simulation signal, convert it into a measurable voltage value, and transmit it to the main control module;

[0068] The Beidou module is used to obtain position information and time information, and provide the position information and the time information to the main control module.

[0069] In this embodiment, the main control module includes an MCU (Microcontroller Unit). Figure 2B As shown, the main control module may also be referred to as an MCU module. In one embodiment, the model of the MCU is STM32F103RCT6.

[0070] Please combine Figure 3 In this embodiment, the signal generation module includes a signal generation chip. In one embodiment, the signal generation chip is MAX2870ETJ+.

[0071] In this embodiment, the detection module includes a logarithmic detector, which detects the RF power output by the second channel of the RF switch module and converts the power into a measurable voltage value, which is convenient for ADC (analog to digital converter) sampling. The logarithmic detector chip uses AD8310ARMZ, which has an extremely fast response time of 15ns, detects and compresses the intermediate frequency signal in dB equivalent form, and the maximum input power is +15dBm.

[0072] In this embodiment, the RF switch module can select the first channel or the second channel for signal transmission, and only one of the first channel and the second channel can be used at the same time, that is, when the first channel is turned on, the second channel is turned off, and when the second channel is turned on, the first channel is turned off. When the first channel is turned on, the lightning simulation signal is transmitted to the power amplifier unit and amplified by the lightning simulation signal. When the second channel is turned on, the lightning simulation signal is detected by the detection module to obtain the output voltage amplitude, signal power, etc. of the lightning simulation signal.

[0073] In this embodiment, the Beidou module can obtain the real-time position information and time information of the UAV, so that the lightning signal simulation device can feed back the position information and time information to the host computer in real time.

[0074] In one embodiment, Figure 2B and Figure 2C As shown, the first control unit also includes an FPGA (Field Programmable Gate Array, programmable array logic) module, the FPGA module is connected to the main control module and the RF switch module, wherein the Beidou module is used to provide 1PPS pulses for the FPGA module, and the RF switch module is used to determine the RF switch time through the FPGA module to determine the analog source window time width, and configure V ctlPin, choose to open the first channel or the second channel.

[0075] The Beidou module selects TAU3101, which provides 1PPS pulses for the FPGA module and time and location information for the MCU module. The Beidou module TAU3101 can provide high-precision 1PPS time-stamp signals with an accuracy better than 10ns (95%, PDOP≤4). Figure 4 As shown in the figure, the positive pulse width of the 1PPS signal is greater than 2ms, the rising edge of the 1PPS signal is the time synchronization point, and the rising time of the rising edge is less than 5ns. Users can adjust the 1PPS phase through the delay setting command. When the timing is valid, the distance between the first character of the TOD information and the rising edge of the 1PPS is greater than 2ms.

[0076] TAU3101 provides a full-duplex UART serial port, baud rate 9600, 1 start bit, 8 data bits, 1 stop bit, data length is 54 bytes, header is @@Hb, data format is shown in Table 1. Beidou module is powered by 3.3V DC.

[0077] Table 1 Data format of Beidou module

[0078]

[0079] In one embodiment, the FPGA module uses Lattice's MACHXO2 family series LCMXO2-1200HC chip. The MACHXO2 series chip has 6 devices with a density range of 256 to 6864 lookup tables (LUTs). In addition to low-cost programmable logic based on LUT, the chip also has embedded block RAM (EBR), distributed RAM, user flash memory (UFM), and phase-locked loop (PLL). The MachXO2 series is designed with a 65nm non-volatile low-power process and has the characteristics of flexible logic architecture, ultra-low power consumption, instant startup, high security, and low cost.

[0080] In one embodiment, the lightning signal simulation system further includes a lightning mapping and detection device, which is used to detect the lightning simulation signal emitted by the lightning signal simulation device, and calculate the cloud-flash detection efficiency based on the detected lightning simulation signal.

[0081] In this embodiment, the lightning mapping detection device can detect the lightning simulation signal emitted by the lightning signal simulation device, and calculate the cloud-flash detection efficiency according to the number of lightning simulation signals detected. In this embodiment, the lightning mapping detection device is also connected to the host computer for transmitting the detected lightning simulation signal and the cloud-flash detection efficiency back to the host computer.

[0082] In one embodiment, the lightning mapping and detection device comprises a lightning mapping array, wherein the lightning mapping array comprises a plurality of lightning sensors or lightning receivers arranged in an array.

[0083] In this embodiment, the lightning mapping and detection device uses an array of multiple lightning sensors or lightning receivers to detect lightning simulation signals.

[0084] In one embodiment, the cloud flash detection efficiency DE IC The calculation method of (%) is as follows:

[0085]

[0086] Among them, N ic_conf is the number of lightning simulation signals emitted by the lightning signal simulation device; N ic det The number of corresponding cloud flashes detected by the lightning mapping and detection device.

[0087] In one embodiment, the lightning mapping and detection device is also used to analyze the detected lightning simulation signal to obtain the signal sending position and sending time, and transmit the signal sending position and sending time back to the host computer. The host computer is used to obtain the position information and time data fed back by the lightning signal simulation device, and compare the position information and time data fed back by the lightning signal simulation device with the signal sending position and sending time detected by the lightning mapping and detection device, so as to calculate the specific detection accuracy of the lightning mapping and detection device.

[0088] In this embodiment, a drone is flown along a certain trajectory, and the ground-based networked lightning equipment receives the radio frequency pulses emitted by the lightning signal simulation device. The ground-based networked lightning equipment compares its own GNSS positioning data and time data with the networked positioning after the lightning mapping array receives the signal, and evaluates the positioning accuracy of the lightning mapping array for cloud flashes.

[0089] Regarding the power amplifier unit, the frequency range of the lightning signal simulation device meets the bandwidth output of 50MHz to 300MHz. The sensitivity of the lightning mapping array receiver is designed to be -95dBm. According to the design requirements of the simulation source, the successful receiving distance of the simulated transmitting source to the ground mapping array substation is not less than 50km, so the following analysis is carried out:

[0090] 1) Free space radio wave propagation loss

[0091] Los(dB)=32.44dB+20lg d(km)+20lg f(MHz);

[0092] Where: d is the communication distance, f is the operating frequency, and if d or f doubles, the loss increases by 6dB.

[0093] At present, the lightning mapping array is designed to cover the frequency band of 50-300MHz, 6MHz / channel, and the substation selects one channel at a time;

[0094] Assume that the ground lightning mapping array substation operating frequency is: f = 193MHz; the expected communication distance is: d = 100km;

[0095] The propagation loss is obtained from the free space radio wave propagation loss formula:

[0096] Los(dB)=120.24(dB);

[0097] 2) Receiver sensitivity: SEN = -95dB.

[0098] 3) Transmitter antenna gain: the transmitter antenna is an omnidirectional whip antenna with an antenna gain of Gt = 2.0 dBi;

[0099] 4) The receiver antenna gain is Gr = 1.8 dBi;

[0100] 5) Therefore, to meet the mission requirements, ideally, the transmitter power should at least reach:

[0101] Propagation loss (Los) = transmission power (P) + receiving sensitivity (Sen) + receiving antenna gain (Gr) + transmitting antenna gain (Gt)

[0102] P(dBm)=27.24dBm

[0103] The above calculation results are based on an ideal situation where the propagation environment is an unobstructed vacuum environment, the output signal is a continuous sine wave, and the receiver sensitivity is -95dBm. In the actual communication environment, the propagation of radio waves is subject to various atmospheric attenuation, background noise interference, and the receiver sensitivity may be less than -95dBm. Therefore, the actual receiver sensitivity is much lower than this ideal value. In addition, considering system redundancy, in this embodiment, the maximum output power of the power amplifier is 100W.

[0104] It should be understood that the expressions "mechanism", "device", "component" and the like used in this application are only a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the word can be replaced by other expressions.

[0105] Those skilled in the art can understand that the above-mentioned embodiments are specific examples for realizing the present invention, and in practical applications, the technical features of the above-mentioned embodiments can be arbitrarily combined. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification, and various changes can be made in form and details without departing from the spirit and scope of the present invention.

Claims

1. A lightning signal simulation system, characterized in that: include: Host computer, lightning signal simulation device and UAV; The lightning signal simulation device includes a communication module, a first control unit, a power amplifier unit and an antenna; The communication module is used to realize wireless communication between the host computer and the first control unit; The first control unit is used to receive a configuration command of the host computer through the communication module, generate a lightning simulation signal in response to the configuration command, and feed back output information to the host computer through the communication module each time the antenna transmits the lightning simulation signal; The power amplifier unit is used to amplify the lightning simulation signal and transmit it to the antenna; The antenna is used to transmit the amplified lightning simulation signal; The UAV includes a fuselage, a second control unit and at least two flight drives. The lightning signal simulation device is installed on the fuselage of the UAV. The second control unit is electrically connected to each of the flight drives. The second control unit is used to receive control instructions from the UAV controller and control each of the flight drives to operate in response to the control instructions so as to control the flight of the UAV.

2. The lightning signal simulation system according to claim 1, characterized in that: The antenna is configured to be foldable, and the height of the end of the folded antenna is greater than the height of the bottom of the drone.

3. The lightning signal simulation system according to claim 2, characterized in that: The lightning signal simulation device also includes a folding drive, the first control unit is electrically connected to the folding drive, and the folding drive is connected to the antenna drive, the second control unit is also used to receive a take-off command or a landing command from the drone controller, and control each flight drive to operate in response to the take-off command or the landing command, the first control unit is also used to control the folding drive to drive the antenna to unfold when the drone takes off, and to control the folding drive to drive the antenna to fold when the drone lands.

4. The lightning signal simulation system according to claim 1, characterized in that: The second control unit is used to receive the flight trajectory information of the drone controller, and control the operation of each flight driver according to the flight trajectory information, so that the drone flies according to a preset flight trajectory.

5. The lightning signal simulation system according to claim 1, characterized in that: The first control unit is used to feed back the output information to the host computer once through the communication module within a first preset time after the antenna transmits the lightning simulation signal once.

6. The lightning signal simulation system according to claim 1, characterized in that: The first control unit is further used to send status information to the host computer through the communication module at intervals of a second preset time, wherein the status information includes time information, location information of the lightning signal simulation device, signal configuration data and AD data.

7. The lightning signal simulation system according to claim 1, characterized in that: The first control unit includes a main control module, a Beidou module, a signal generation module, a radio frequency switch module and a detection module; The main control module is connected to the Beidou module, the signal generation module, the RF switch module and the detection module; The main control module is used to receive the configuration command of the host computer through the communication module, and control the signal generation module to work in response to the configuration command; The signal generating module is used to generate the lightning simulation signal under the control of the main control module; The RF switch module has a first channel and a second channel. The input end of the RF switch module is connected to the signal generation module, the first channel is connected to the power amplifier unit, and the second channel is connected to the detection module. Under the control of the control module, the RF switch module opens the first channel and closes the second channel to transmit the lightning simulation signal generated by the signal generation module to the power amplifier unit, or opens the second channel and closes the first channel to transmit the lightning simulation signal generated by the signal generation module to the detection module. The detection module is used to detect the radio frequency power of the lightning simulation signal, convert it into a measurable voltage value, and transmit it to the main control module; The Beidou module is used to obtain position information and time information, and provide the position information and the time information to the main control module.

8. The lightning signal simulation system according to any one of claims 1 to 7, characterized in that: It also includes a lightning mapping and detection device, which is used to detect the lightning simulation signal emitted by the lightning signal simulation device and calculate the cloud-flash detection efficiency based on the detected lightning simulation signal.

9. The lightning signal simulation system according to claim 8, characterized in that: The lightning mapping and detection device comprises a lightning mapping array, which comprises a plurality of lightning sensors or lightning receivers arranged in an array.

10. The lightning signal simulation system according to claim 8, characterized in that: Cloud-flash detection efficiency DE IC The calculation method of (%) is as follows: Among them, N ic_conf is the number of lightning simulation signals emitted by the lightning signal simulation device; N ic_det The number of corresponding cloud flashes detected by the lightning mapping and detection device.

Images