Portable intelligent lightning electric field early warning device

Abstract

The utility model relates to electric field early warning technical field especially relates to a portable intelligent thunder and lightning electric field early warning device. Its technical scheme includes the flat plate antenna, signal amplification module, signal filter module that electric connection in proper order, with signal filter module electric connection's main control module and with main control module electric connection's external device module. Flat plate antenna is based on electrostatic induction principle, adopts the metal plate structure of horizontal arrangement, is used for receiving thunder and lightning electric field change signal and produces induction current, flat plate antenna is based on electrostatic induction principle, and metal produces induction charge in electric field. The utility model passes through the integration low power consumption portable power and optimization circuit design, solved the problem that traditional thunder and lightning electric field detector volume is big, power consumption is high, alarm delay, realized portable, intelligent grading early warning and data real -time sharing integration function.

Description

Technical Field

[0001] This utility model relates to the field of electric field early warning technology, and in particular to a portable intelligent lightning electric field early warning device. Background Technology

[0002] Lightning is essentially an air breakdown discharge phenomenon occurring within, between, and between clouds and the ground. Its formation process involves stages such as charge accumulation within the cloud, charge separation, localized electric field breakdown, leader formation, and finally, violent discharge, lasting for tens of minutes. This characteristic provides feasibility for lightning warnings by detecting changes in the electric field of thunderstorm clouds. By capturing real-time electric field change signals within thunderstorm clouds, combining them with existing lightning warning level specifications and standards, and using artificial intelligence technology to analyze and process the electric field change data, intelligent monitoring and dissemination of lightning warning information can be achieved, providing support for early risk prediction in relevant scenarios.

[0003] Currently, the mainstream technologies used for lightning electric field detection include field-milled electric field meters, fast-antenna electric field change meters, and slow-antenna electric field change meters. However, these technologies have significant limitations in practical applications and cannot meet the needs for convenient and intelligent lightning early warning. The specific problems are as follows: Equipment size and power supply limitations: Existing lightning electric field detectors are generally large in size, and most of them rely on mains power, which makes them difficult to deploy flexibly and adapt to outdoor operations, temporary monitoring points and other scenarios with high requirements for equipment portability. Insufficient coordination between communication and early warning: The detection system and the alarm system are separate, and there is a communication delay in data transmission, which makes it impossible to quickly convert electric field detection data into early warning signals, thus reducing the timeliness of early warning response; The data presentation is too technical: the detection data output by the equipment is mostly presented in the form of professional parameters, which requires professional personnel to interpret. Ordinary users cannot quickly understand the lightning risk level behind the data, which is not conducive to the efficient transmission and application of early warning information.

[0004] To address the shortcomings of existing technologies, there is an urgent need to design a lightning electric field early warning solution that integrates portability, low power consumption, intelligence, and multi-level early warning functions. This solution should optimize equipment structure, power supply methods, data processing, and early warning coordination mechanisms to achieve real-time, accurate, and convenient dissemination of lightning early warning information, meeting the needs of lightning risk prevention and control in different scenarios. Therefore, this application proposes a portable intelligent lightning electric field early warning device. Utility Model Content

[0005] The purpose of this invention is to address the problems in the background technology where lightning electric field detection equipment is generally large in size and lacks coordination between communication and early warning, and to propose a portable intelligent lightning electric field early warning device.

[0006] The technical solution of this utility model is: a portable intelligent lightning electric field early warning device, including a flat panel antenna, used to receive lightning electric field change signals based on the principle of electrostatic induction, and convert the electric field change into induced current; The signal amplification module is electrically connected to the flat panel antenna and is used to integrate and amplify the induced current and convert it into a voltage signal; the signal amplification module adopts an integration amplification circuit built with the LMP7721 chip as the core. The signal filtering module is electrically connected to the signal amplification module and is used to filter out high-frequency noise in the amplified voltage signal; the signal filtering module adopts a second-order low-pass filter built with the TLV2731CDBVR chip as the core; The main control module is electrically connected to the signal filtering module and is used to collect and process the filtered signal, and to perform early warning judgment and control. The warning output module is electrically connected to the main control module and is used to issue acoustic and / or optical warning signals according to the control instructions of the main control module; The power supply module is used to supply power to the signal amplification module, signal filtering module, main control module and early warning output module.

[0007] Optionally, the main control module uses an STM32F103C8T6 microcontroller chip.

[0008] Optionally, the ADC port built into the main control module is used to acquire the voltage signal output by the signal filtering module; the main control module is configured to perform quality control on the acquired signal and classify different lightning warning levels according to the signal strength.

[0009] Optionally, the warning output module includes a buzzer and an LED indicator. The PWM port built into the main control module is used to control the beeping frequency of the buzzer and / or the flashing frequency and color of the LED indicator to correspond to different lightning warning levels.

[0010] Optional, also includes: The storage module is connected to the main control module via an SPI communication interface and is used for local storage of historical electric field data and early warning records.

[0011] Optional, also includes: The GPS positioning module is connected to the main control module via a UART interface to obtain the device's real-time location information; The 4G wireless communication module is connected to the main control module via a UART interface and is used to send lightning warning information, occurrence time, and location information to the server.

[0012] Optionally, a real-time clock module is also included, which is connected to the main control module via an I2C interface to provide the main control module with accurate time information.

[0013] Optionally, the integrating amplifier circuit includes a feedback capacitor C1, a feedback resistor R1, and decoupling capacitors C2 and C3; The feedback capacitor C1 and the feedback resistor R1 are connected in parallel and between the output terminal and the inverting input terminal of the LMP7721 chip to form an integrating amplifier circuit. The decoupling capacitors C2 and C3 are respectively connected between the positive power supply pin and ground, and between the negative power supply pin and ground of the LMP7721 chip. The parameters of the feedback resistor R1 and the feedback capacitor C1 are adjustable to amplify the pA-level induced current into the required voltage signal.

[0014] Compared with the prior art, this application includes at least one of the following beneficial technical effects: The circuit structure of this utility model is simple, the selection of each module component is universal and the connection logic is clear, making it easy to implement in actual production and assembly.

[0015] By adopting a compact structural design and combining it with low-power core components (such as the LMP7721 chip with a static current of 1.3mA and the TLV2731CDBVR chip with an operating current of 2.2mA), the overall design is lightweight and small in size, supports portable power supply (such as a 3.7V lithium battery), and is highly portable and flexible, making it suitable for outdoor mobile scenarios.

[0016] Compared to large fixed lightning electric field detectors, the device uses cost-effective general-purpose components for its core chip and external equipment modules, eliminating the need for complex fixed installations and mains power supply facilities, resulting in lower overall costs.

[0017] It can issue audible and visual alarm prompts according to the electric field strength, with different frequencies of buzzer sounding and different colors of LED indicator flashing, adapting to different usage scenarios such as noisy environments or nighttime, ensuring that users can detect the risk of lightning in time and take targeted protective measures.

[0018] It integrates GPS positioning and 4G wireless communication functions, enabling remote sharing of lightning data; it also supports local storage of historical electric field data and early warning records, and the stored data includes the time and location information of the corresponding early warning events, providing support for subsequent lightning data tracing and pattern analysis.

[0019] This invention solves the problems of large size, high power consumption, and alarm delay of traditional lightning field detectors by integrating a low-power portable power supply and optimized circuit design, and realizes the integrated functions of portability, intelligent hierarchical early warning and real-time data sharing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a portable intelligent lightning electric field early warning device. Figure 2 This is a schematic diagram of a lightning signal amplification circuit based on the LMP7721 chip. Figure 3 This is a schematic diagram of a lightning low-pass filter circuit based on the TLV2731CDBVR chip. Figure 4 This is a circuit connection diagram between the main control STM32F103C8T6 chip and the external module. Detailed Implementation

[0021] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other. Example

[0022] like Figure 1 As shown, the present invention proposes a portable intelligent lightning electric field early warning device, comprising a flat panel antenna, a signal amplification module, a signal filtering module, a main control module electrically connected to the signal filtering module, and an external device module electrically connected to the main control module, which are connected in sequence. The flat panel antenna is based on the principle of electrostatic induction and uses a horizontally arranged metal plate structure to receive lightning electric field change signals and generate induced current. The flat panel antenna is based on the principle of electrostatic induction, and metal will generate induced charge in an electric field. Therefore, the horizontally arranged metal plate in this invention is used as a lightning electric field change receiving antenna. The change of lightning electric field can be obtained by measuring the induced current on the flat panel antenna.

[0023] The signal amplification module is used to integrate and amplify the pA-level induced current output from the flat panel antenna to obtain a voltage signal that can be further processed, such as... Figure 2 Signal amplification module: Since the induced current of the flat panel antenna is several pA, an integrating amplifier circuit is first used to amplify the induced current. Considering the characteristics of lightning signals, this invention selects the IMP7721 as the operational amplifier for the integrating circuit. The IMP7721 chip not only has ultra-low input bias current and a high gain-bandwidth product that significantly reduces signal distortion and improves the device's ability to detect weak signals; secondly, the IMP7721 has extremely high common-mode impedance, with a typical value reaching 6 × 10⁻⁶ pA. 12Ω, thus avoiding signal voltage division loss, reducing noise interference and temperature drift error; at the same time, the LMP7721 has a quiescent current of only 1.3mA and a supply voltage range of 1.8V to 5.5V, which can be powered by common portable power supplies. The schematic diagram of the lightning signal amplification circuit based on the LMP7721 chip is shown in Figure 2, which mainly consists of the LMP7721 high-precision amplifier, feedback capacitor C1, feedback resistor R1, and decoupling capacitors C2 and C3; the circuit cutoff frequency is... The circuit's output voltage: By adjusting the values ​​of R1 and C1 in the signal amplification circuit, the pA current signal can be amplified into the required voltage signal output.

[0024] The signal filtering module is used to perform low-pass filtering on the voltage signal output from the signal amplification module, filtering out high-frequency interference signals, such as... Figure 3 As shown, the signal filtering module: The electric field change signal of lightning is mainly concentrated in the low frequency range. Therefore, this invention uses an SK second-order filter to process the amplified information and filter out unwanted high-frequency signals. Considering the characteristics of the amplified signal, this invention selects the TLV2731CDBVR chip as the operational amplifier circuit for the SK second-order filter. The TLV2731CDBVR chip has advantages such as low power consumption, rail-to-rail output, high input impedance and low noise, miniaturized package, and wide voltage range. This chip, while achieving the filtering function, provides a foundation and conditions for the portable design of this device in terms of energy consumption and space. The schematic diagram of the lightning low-pass filter circuit based on the TLV2731CDBVR chip is shown in Figure 3. It mainly consists of the TLV2731CDBVR chip, impedance matching resistor R1 and input stage capacitor C1, feedback resistor and feedback capacitor C2, feedback resistor R1 and decoupling capacitors C3 and C4; the circuit cutoff frequency is... Circuit type factor: Adjusting the values ​​of R1, C1, and C2 in the signal amplification circuit can filter out unwanted high-frequency signals.

[0025] The main control module receives signals from the signal filtering module, performs quality control to eliminate non-lightning data, and determines the lightning warning level based on signal strength. It also controls external device modules to perform warning, data storage, and data transmission operations. Because the main control module needs to intelligently alarm and record lightning signals in a timely manner, it requires a master controller to unify the collaborative work between modules. The master controller can promptly acquire collected lightning signals. After processing by the front end, the lightning signals are directly input to the main control module. The main control module executes program code based on its built-in processor, processes the input signals, determines the lightning signal level, and controls a buzzer and LED indicator to display the current lightning warning information via PWM output. The master controller can also record each lightning event in its memory, including the time and location of the lightning strike, facilitating subsequent lightning data tracing. Furthermore, the master controller can transmit lightning signals, occurrence time, and location to the server via a 4G module, enabling data sharing. The external device modules include a buzzer, LED indicator, memory, GPS module, 4G module, and RTC module, which are used to realize audible and visual warning, local storage of lightning data, location acquisition, remote data sharing, and real-time time acquisition, respectively.

[0026] The main control module, considering high performance, low power consumption, rich peripherals, flexible configuration, cost-effectiveness, and stability, selects the widely used STM32F103C8T6 microcontroller. Based on the STM32F103C8T6 microcontroller's ADC, PWM, UART, I2C, and SPI control ports, it can achieve intelligent, tiered lightning warning information dissemination, lightning data sharing, and local storage of historical electric field data and warning records. The connection between the STM32F103C8T6 main control chip and external module circuits is also discussed. Figure 4 As shown.

[0027] The ADC module is mainly used to collect lightning electric field signals after front-end processing. First, the lightning signals are quality controlled to remove non-lightning data. Then, the lightning warning level (red, orange, yellow, blue) is determined according to the different signal strengths.

[0028] The PWD module is primarily used to control the loudness of the buzzer and the status of the LED indicator. Different frequencies and duty cycles result in different sounds and colors. The buzzer uses PWM output to control its frequency, achieving different warning effects. When a lightning signal is generated, the buzzer sounds at different frequencies based on the lightning warning level output by the STM32 microcontroller. The buzzer can be controlled to sound at 2Hz, 1Hz, and 0.5Hz, providing four warning levels with continuous sound. The LED indicator flashes different colors based on the lightning warning level output by the STM32 microcontroller after a lightning signal is generated. The indicator status is red, orange, yellow, and blue, depending on the lightning intensity.

[0029] RTC (Real-Time Clock Module): The I2C module is mainly used to communicate with the RTC to obtain the real-time clock. Each time the lightning status is recorded, the current time needs to be written.

[0030] The UART module is primarily used to communicate with the GPS module to obtain the current device coordinates and record the location information in the memory. It also communicates with the 4G module, sending lightning information to the server via the 4G module.

[0031] SPI communication is mainly used to communicate with the storage module to store and retrieve saved information. When lightning occurs, the collected lightning-related information is written into the storage chip. When querying lightning information later, the recorded information can be read from the storage chip.

[0032] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A portable intelligent lightning electric field early warning device, characterized in that, include: A flat panel antenna is used to receive lightning electric field change signals based on the principle of electrostatic induction and convert the electric field change into induced current. The signal amplification module is electrically connected to the flat panel antenna and is used to integrate and amplify the induced current and convert it into a voltage signal; the signal amplification module adopts an integration amplification circuit built with the LMP7721 chip as the core. The signal filtering module is electrically connected to the signal amplification module and is used to filter out high-frequency noise in the amplified voltage signal; the signal filtering module adopts a second-order low-pass filter built with the TLV2731CDBVR chip as the core; The main control module is electrically connected to the signal filtering module and is used to collect and process the filtered signal, and to perform early warning judgment and control. The warning output module is electrically connected to the main control module and is used to issue acoustic and / or optical warning signals according to the control commands of the main control module; The power supply module is used to supply power to the signal amplification module, signal filtering module, main control module and early warning output module.

2. The portable intelligent lightning electric field early warning device according to claim 1, characterized in that, The main control module uses an STM32F103C8T6 microcontroller chip.

3. A portable intelligent lightning electric field early warning device according to claim 2, characterized in that, The ADC port built into the main control module is used to acquire the voltage signal output by the signal filtering module; the main control module is configured to perform quality control on the acquired signal and classify different lightning warning levels according to the signal strength.

4. A portable intelligent lightning electric field early warning device according to claim 3, characterized in that, The warning output module includes a buzzer and an LED indicator. The PWM port built into the main control module is used to control the beeping frequency of the buzzer and / or the flashing frequency and color of the LED indicator to correspond to different lightning warning levels.

5. A portable intelligent lightning electric field early warning device according to claim 2, characterized in that, Also includes: The storage module is connected to the main control module via an SPI communication interface and is used for local storage of historical electric field data and early warning records.

6. A portable intelligent lightning electric field early warning device according to claim 2, characterized in that, Also includes: The GPS positioning module is connected to the main control module via a UART interface to obtain the device's real-time location information; The 4G wireless communication module is connected to the main control module via a UART interface and is used to send lightning warning information, occurrence time and location information to the server.

7. A portable intelligent lightning electric field early warning device according to claim 6, characterized in that, It also includes a real-time clock module, which is connected to the main control module via an I2C interface to provide the main control module with accurate time information.

8. A portable intelligent lightning electric field early warning device according to claim 1, characterized in that, The integrating amplifier circuit includes a feedback capacitor C1, a feedback resistor R1, and decoupling capacitors C2 and C3. The feedback capacitor C1 and the feedback resistor R1 are connected in parallel and between the output terminal and the inverting input terminal of the LMP7721 chip to form an integrating amplifier circuit. The decoupling capacitors C2 and C3 are respectively connected between the positive power supply pin and ground, and between the negative power supply pin and ground of the LMP7721 chip. The parameters of the feedback resistor R1 and the feedback capacitor C1 are adjustable to amplify the pA-level induced current into the required voltage signal.

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