A device and method for classifying and detecting strong electromagnetic pulses with different magnitude rise times

Abstract

The present invention discloses a device and method for classifying and detecting strong electromagnetic pulses with different magnitude rise times. The device comprises an antenna, a low-pass filter, and a processing unit electrically connected in sequence. The antenna is used to receive electromagnetic pulses, the low-pass filter is used to perform low-pass filtering on the electromagnetic pulses to obtain low-frequency harmonic signals, and the processing unit is used to perform low-speed A / D sampling on the low-frequency harmonic signals and extract the spectrum information of the sampled digital signals. Based on the spectrum information, the strong electromagnetic pulse type to which the electromagnetic pulse belongs is determined. The present invention converts existing high-speed sampling to low-speed sampling, effectively detecting low-frequency harmonic signals in strong electromagnetic pulse signals in the microsecond and nanosecond range and generating timely alarms. This greatly reduces the development cost of the device, facilitates large-scale promotion and application, and has great economic and practical significance.

Description

Technical Field

[0001] The present invention relates to the field of radio technology, and in particular to a device and method for classifying and detecting strong electromagnetic pulses with different magnitude rise times. Background Art

[0002] Strong electromagnetic pulse signals are extremely harmful to electronic equipment, causing damage to components and rendering them inoperable. Strong electromagnetic pulse signals in the microsecond and nanosecond ranges are particularly harmful due to their high energy and short duration.

[0003] Conventional classification of strong electromagnetic pulses in the microsecond and nanosecond range uses high-speed A / D direct sampling to obtain signal characteristics and thus confirm the occurrence of a strong electromagnetic pulse. While this method can achieve the purpose of detecting strong electromagnetic pulses, the high cost of high-speed A / D sampling has prevented the widespread adoption of this technology. Summary of the Invention

[0004] The embodiments of the present invention provide a device and method for classifying and detecting strong electromagnetic pulses with different magnitude rise times, so as to solve the problem of high cost of high-speed A / D sampling in the prior art.

[0005] On the one hand, an embodiment of the present invention provides a device for classifying and detecting strong electromagnetic pulses with different magnitude rise times, comprising:

[0006] an antenna for receiving electromagnetic pulses;

[0007] an amplifier, electrically connected to the antenna, for amplifying the electromagnetic pulse;

[0008] A low-pass filter is electrically connected to the amplifier and is used to perform low-pass filtering on the amplified electromagnetic pulse to obtain a low-frequency harmonic signal;

[0009] The processing unit is electrically connected to the low-pass filter and is used to perform low-speed A / D sampling on the low-frequency harmonic signal, extract spectrum information of the sampled digital signal, and determine the strong electromagnetic pulse type to which the electromagnetic pulse belongs based on the spectrum information.

[0010] On the other hand, an embodiment of the present invention further provides a classification detection method for strong electromagnetic pulses with different magnitude rise times, comprising:

[0011] Receiving electromagnetic pulses;

[0012] Amplify electromagnetic pulses;

[0013] Performing low-pass filtering on the amplified electromagnetic pulse to obtain a low-frequency harmonic signal;

[0014] Perform low-speed A / D sampling on the low-frequency harmonic signal to obtain the sampled digital signal;

[0015] Extract spectrum information of digital signals;

[0016] The type of strong electromagnetic pulse to which the electromagnetic pulse belongs is determined based on the spectrum information.

[0017] The device and method for classifying and detecting strong electromagnetic pulses with different magnitude rise times in the present invention have the following advantages:

[0018] It can effectively detect low-frequency harmonic signals in strong electromagnetic pulse signals at the subtle and nanosecond levels, providing timely warning time. Technically, it converts the original high-speed sampling to low-speed sampling, greatly reducing equipment costs and facilitating large-scale promotion, which has great economic and practical significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the composition of a device for classifying and detecting strong electromagnetic pulses with different magnitude rise times provided by an embodiment of the present invention;

[0021] Figure 2 This is a flow chart of a method for classifying and detecting strong electromagnetic pulses with rise times of different magnitudes provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Figure 1 Schematic diagram of the composition of a device for classifying and detecting strong electromagnetic pulses with different magnitudes of rise time provided by an embodiment of the present invention. The embodiment of the present invention provides a device for classifying and detecting strong electromagnetic pulses with different magnitudes of rise time, comprising:

[0024] an antenna for receiving electromagnetic pulses;

[0025] an amplifier, electrically connected to the antenna, for amplifying the electromagnetic pulse;

[0026] A low-pass filter is electrically connected to the amplifier and is used to perform low-pass filtering on the amplified electromagnetic pulse to obtain a low-frequency harmonic signal;

[0027] The processing unit is electrically connected to the low-pass filter and is used to perform low-speed A / D sampling on the low-frequency harmonic signal, extract spectrum information of the sampled digital signal, and determine the strong electromagnetic pulse type to which the electromagnetic pulse belongs based on the spectrum information.

[0028] Exemplarily, the antenna may be an omnidirectional antenna, and the center frequency of the antenna meets the detection requirements, that is, the center frequency of the antenna matches the frequency of the electromagnetic pulse to be detected.

[0029] The processing unit can also utilize an FPGA (Field Programmable Gate Array) processor with a built-in low-speed A / D (Analog-to-Digital) converter to convert the filtered analog signal into a digital signal. Since strong electromagnetic pulses are accompanied by low-frequency harmonics, after low-pass filtering to obtain the low-frequency harmonic signal, the spectrum information can be extracted to determine the type of strong electromagnetic pulse to which the received electromagnetic pulse belongs.

[0030] In an embodiment of the present invention, the amplifier is a low-noise amplifier. While amplifying the power of electromagnetic pulses, it must also ensure that the noise introduced is as low as possible to reduce the impact on signal quality. Furthermore, the operating frequency band of the amplifier must also meet the frequency requirements of the electromagnetic pulses to ensure that the frequency of the electromagnetic pulses to be processed is within the operating frequency band.

[0031] In a possible embodiment, the device further includes: an alarm module electrically connected to the processing unit, and configured to generate an alarm message after the processing unit determines that the electromagnetic pulse is a strong electromagnetic pulse.

[0032] For example, the alarm module can generate an audible and visual alarm, as well as an electrical signal alarm message. This electrical signal alarm message can be received by electronic equipment to alert management personnel. After the alarm message is generated, equipment to respond to the strong electromagnetic pulse can be automatically activated to deal with the impact of the strong electromagnetic pulse on the equipment.

[0033] In a possible embodiment, the system further includes: a communication module electrically connected to the processing unit, and configured to report the detection result of the processing unit to the management device.

[0034] For example, the communication module can upload a detection result to the management device when the processing unit determines that the electromagnetic pulse is a strong electromagnetic pulse. Alternatively, the communication module can upload any detection result to the management device upon obtaining the detection result. The management device can then store and analyze the detection result. The communication module can connect the processing unit to the management device using wireless communication or wired communication, such as optical fiber.

[0035] In a possible embodiment, the system further includes: a debugging interface electrically connected to the processing unit and used for debugging and upgrading the processing unit.

[0036] For example, the debug interface is an interface for communication between an external device and the processing unit, and can be a USB (Universal Serial Bus) interface or other common interfaces. Through this debug interface, the processing unit can be connected to an external device, allowing the external device to write software programs to the processing unit, or to debug or upgrade the software programs in the processing unit.

[0037] In a possible embodiment, the system further includes: a power supply module electrically connected to the amplifier, the low-pass filter, and the processing unit, and configured to provide power to the amplifier, the low-pass filter, and the processing unit.

[0038] For example, the power module can directly supply power to devices with matching rated voltages, or it can convert the power, for example, converting a 5V power source to 3.3V, and then supplying it to devices with matching rated voltages. In addition to supplying power to the low-pass filter and processing unit, it also needs to supply power to the amplifier, alarm module, and communication module.

[0039] The embodiment of the present invention also provides a classification detection method for strong electromagnetic pulses with different magnitude rise times, such as Figure 2 As shown, the method includes:

[0040] S200, receiving electromagnetic pulses;

[0041] S210, amplifying the electromagnetic pulse;

[0042] S220, performing low-pass filtering on the amplified electromagnetic pulse to obtain a low-frequency harmonic signal;

[0043] S230, performing low-speed A / D sampling on the low-frequency harmonic signal to obtain a sampled digital signal;

[0044] S240, extracting spectrum information of the digital signal;

[0045] S250: Determine the type of strong electromagnetic pulse to which the electromagnetic pulse belongs based on the spectrum information.

[0046] Exemplarily, Fourier Transform (FT) may be used to extract spectrum information from a digital signal, so as to convert a time-domain digital signal into a frequency-domain signal.

[0047] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0048] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A classification detection device for strong electromagnetic pulses with different magnitude rise times, characterized in that: include: an antenna for receiving electromagnetic pulses; an amplifier, electrically connected to the antenna, for amplifying the electromagnetic pulse; a low-pass filter electrically connected to the amplifier, and configured to perform low-pass filtering on the amplified electromagnetic pulse to obtain a low-frequency harmonic signal; a processing unit electrically connected to the low-pass filter, configured to perform low-speed A / D sampling on the low-frequency harmonic signal, extract spectrum information of the sampled digital signal, and determine the type of strong electromagnetic pulse to which the electromagnetic pulse belongs based on the spectrum information; It also includes: an alarm module, electrically connected to the processing unit, and configured to generate an alarm message after the processing unit determines that the electromagnetic pulse is a strong electromagnetic pulse; It also includes: a communication module, electrically connected to the processing unit, and used to report the detection result of the processing unit to a management device.

2. The device for classifying and detecting strong electromagnetic pulses with different magnitude rise times according to claim 1, characterized in that: Also includes: A debugging interface is electrically connected to the processing unit and is used to debug and upgrade the processing unit.

3. The device for classifying and detecting strong electromagnetic pulses with different magnitude rise times according to claim 1, characterized in that: Also includes: A power supply module is electrically connected to the amplifier, the low-pass filter and the processing unit, and is used to provide power to the amplifier, the low-pass filter and the processing unit.

4. The device for classifying and detecting strong electromagnetic pulses with different magnitude rise times according to claim 1, characterized in that: The processing unit is an FPGA processor.

5. The device for classifying and detecting strong electromagnetic pulses with different magnitude rise times according to claim 1, characterized in that: The antenna is an omnidirectional antenna.

6. A method for classifying and detecting strong electromagnetic pulses with different magnitude rise times as described in any one of claims 1 to 5, characterized in that: include: Receiving electromagnetic pulses; amplifying the electromagnetic pulse; performing low-pass filtering on the amplified electromagnetic pulse to obtain a low-frequency harmonic signal; Performing low-speed A / D sampling on the low-frequency harmonic signal to obtain a sampled digital signal; extracting spectrum information of the digital signal; The strong electromagnetic pulse type of the electromagnetic pulse is determined according to the spectrum information.

7. The method for classifying and detecting strong electromagnetic pulses with different magnitude rise times according to claim 6, characterized in that: The extracting the spectrum information of the digital signal includes: Performing Fourier transform on the digital signal to obtain the frequency spectrum information.

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