Electromagnetic interference source positioning device and electronic equipment

Abstract

The embodiment of the utility model discloses an electromagnetic interference source positioning device and electronic equipment, which can solve the problems that the requirement of quick positioning is difficult to meet and the positioning precision is limited at present. The electromagnetic interference source positioning device comprises an antenna array coupling plate which is provided with a plurality of antennas and a plurality of LED lamps, and the plurality of antennas and the plurality of LED lamps are in one-to-one correspondence; the target antenna is used for receiving an electromagnetic signal of the electromagnetic interference source, and the target LED lamp is used for indicating the intensity of the electromagnetic signal received by the target antenna through brightness; the single-pole multi-throw radio frequency switch is connected with each antenna on the antenna array coupling plate, and the single-pole multi-throw radio frequency switch is used for sequentially switching switch states so as to be connected with different antennas and transmitting an electromagnetic signal received by each antenna to the spectrum analyzer for processing; the spectrum analyzer is used for determining electromagnetic signal intensity information of each antenna; and the processor is used for determining the position information of the electromagnetic interference source according to the electromagnetic signal intensity information of each antenna and the position relationship between the antennas.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of electromagnetic interference positioning technology, and in particular to an electromagnetic interference source positioning device and electronic equipment. Background Art

[0002] As the integration of electronic devices and systems continues to rise, the problem of electromagnetic interference has become increasingly prominent. Accurately and quickly locating the source of electromagnetic interference is crucial for resolving electromagnetic interference problems, improving equipment performance, enhancing product reliability, shortening product development cycles, and accelerating iterations. Currently, this is mainly done by manipulating a scanning antenna to scan the space around the device or system to be tested point by point to measure the electromagnetic signal strength at different locations and determine the approximate location of the electromagnetic interference source accordingly. However, a single scanning antenna needs to scan a large spatial range point by point, which causes the entire positioning process to take a long time, making it difficult to meet the needs of rapid positioning. It is also easily affected by factors such as environmental reflections and multipath propagation, resulting in limited positioning accuracy and difficulty in accurately determining the specific location of the interference source. Utility Model Content

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, the embodiments of the present application provide an electromagnetic interference source positioning device and an electronic device to solve the problem that the current positioning process is time-consuming, difficult to meet the needs of rapid positioning, and easily affected by factors such as environmental reflection and multipath propagation, resulting in limited positioning accuracy.

[0004] In order to achieve the above objectives, the technical solutions provided in the embodiments of the present application are as follows:

[0005] In a first aspect, an embodiment of the present application provides an electromagnetic interference source locating device, the electromagnetic interference source locating device comprising:

[0006] An antenna array coupling board, wherein a plurality of antennas and a plurality of LED lights are provided on the antenna array coupling board, wherein the plurality of antennas and the plurality of LED lights correspond one to one, and a target LED light is located in an opposite mapping direction of the corresponding target antenna, wherein the target LED light is any one of the plurality of LED lights, and the target antenna is the antenna among the plurality of antennas corresponding to the target LED light; the target antenna is configured to receive an electromagnetic signal from an electromagnetic interference source, and the target LED light is configured to indicate the strength of the electromagnetic signal received by the target antenna by brightness;

[0007] A single-pole multi-throw radio frequency switch, connected to each antenna on the antenna array coupling board, configured to sequentially switch between different antennas and transmit electromagnetic signals received by each antenna to a spectrum analyzer for processing;

[0008] The spectrum analyzer is configured to receive the electromagnetic signal received by each antenna, analyze the electromagnetic signal, determine the electromagnetic signal strength information of each antenna, and send the electromagnetic signal strength information of each antenna to the processor;

[0009] The processor is configured to determine the location information of the electromagnetic interference source based on the electromagnetic signal strength information of each antenna and the positional relationship between each antenna.

[0010] As an optional implementation, in the first aspect of the embodiment of the present application, the spectrum analyzer is specifically used to filter the electromagnetic signal of each antenna through a filter, and amplify the filtered signal to obtain the target electromagnetic signal of each antenna; and, analyze the target electromagnetic signal of each antenna to determine the electromagnetic signal strength information of each antenna.

[0011] As an optional implementation, in the first aspect of the embodiment of the present application, the spectrum analyzer is specifically used to convert the target electromagnetic signal of each antenna into a frequency domain electromagnetic signal, and obtain the spectrum distribution information corresponding to the frequency domain electromagnetic signal of each antenna through fast Fourier transform; and, based on the spectrum distribution information, determine the electromagnetic signal strength information of each antenna.

[0012] As an optional implementation, in the first aspect of the embodiment of the present application, the spectrum analyzer is specifically used to determine the frequency resolution of the spectrum analysis based on the sampling frequency and the number of points of the fast Fourier transform; and based on the frequency resolution, determine the spectrum amplitude value corresponding to each frequency point; based on the spectrum amplitude value, determine the electromagnetic signal strength information of each antenna.

[0013] As an optional implementation, in the first aspect of the embodiment of the present application, the spectrum analyzer is specifically used to determine the peak point of the preset frequency band based on the spectrum amplitude value, and determine the peak point as the electromagnetic signal strength information of the preset frequency band.

[0014] As an optional implementation, in the first aspect of the embodiment of the present application, the spectrum analyzer is specifically used to determine the average power of a preset frequency band based on the spectrum amplitude value, and determine the average power as the electromagnetic signal strength information of the preset frequency band.

[0015] As an optional embodiment, in the first aspect of the embodiment of the present application, the spectrum analyzer is also used to determine that the electromagnetic signal received by the target antenna is a strong signal when it is detected that the electromagnetic signal strength information of the target antenna is greater than a preset strength threshold; or, when it is detected that the ratio between the electromagnetic signal strength information of the target antenna and the background noise is greater than a preset strength ratio, determine that the electromagnetic signal received by the target antenna is a strong signal.

[0016] As an optional implementation, in the first aspect of the embodiment of the present application, the processor is specifically used to determine the antennas in the corresponding area based on the location information of the electromagnetic interference source and the positional relationship between the multiple antennas; and control the brightness of the LED lights in the corresponding area through a preset dimming algorithm.

[0017] As an optional implementation, in the first aspect of the embodiment of the present application, the processor is specifically used to send an instruction to the single-pole multi-throw radio frequency switch so that the single-pole multi-throw radio frequency switch switches to the corresponding antenna according to the instruction to transmit the electromagnetic signal.

[0018] In a second aspect, an embodiment of the present application provides an electronic device, comprising: the electromagnetic interference source locating device described in the first aspect.

[0019] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0020] An embodiment of the present application provides an electromagnetic interference source locating device and an electronic device, the electromagnetic interference source locating device comprising: a plurality of antennas and a plurality of LED lights are provided on an antenna array coupling board, the plurality of antennas and the plurality of LED lights correspond one to one, the target LED light is located in the opposite mapping direction of the corresponding target antenna, the target LED light is any one of the plurality of LED lights, and the target antenna is the antenna corresponding to the target LED light among the plurality of antennas; the target antenna is used to receive the electromagnetic signal of the electromagnetic interference source, and the target LED light is used to indicate the strength of the electromagnetic signal received by the target antenna through brightness; a single-pole multi-throw radio frequency switch is connected to each antenna on the antenna array coupling board, the single-pole multi-throw radio frequency switch is used to switch the switch state in sequence to connect different antennas, and transmit the electromagnetic signal received by each antenna to a spectrum analyzer for processing; the spectrum analyzer is used to receive the electromagnetic signal received by each antenna, analyze the electromagnetic signal, determine the electromagnetic signal strength information of each antenna; and send the electromagnetic signal strength information of each antenna to a processor; the processor is used to determine the location information of the electromagnetic interference source based on the electromagnetic signal strength information of each antenna and the positional relationship between each antenna. This electromagnetic interference source locating device uses efficient signal processing algorithms and positioning calculation methods to quickly determine the location of the electromagnetic interference source and improve work efficiency. In addition, combined with antenna arrays and advanced mathematical models, it can accurately calculate the location of the interference source and improve positioning accuracy. In addition, the brightness of the LED light indicates the location of the interference source, making it convenient for users to take timely measures to eliminate interference or conduct further analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a schematic diagram of the structure of an electromagnetic interference source positioning device provided in an embodiment of the present application. Figure 1 ;

[0024] Figure 2 a is a schematic diagram of the structure of an electromagnetic interference source locating device provided in an embodiment of the present application Figure 2 ;

[0025] Figure 2 b is a schematic diagram of the structure of an electromagnetic interference source locating device provided in an embodiment of the present application Figure 3 ;

[0026] Figure 3 This is a structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other in the absence of conflict. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0028] The terms "first" and "second" and the like in the description and claims of this application are used to distinguish different objects rather than to describe a specific order of the objects.

[0029] The terms "including" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatus.

[0030] It should be noted that in the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being more preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0031] As the integration of electronic devices and systems continues to rise, electromagnetic interference (EMI) issues are becoming increasingly prominent. For EMI engineers, being able to accurately and quickly locate EMI sources is crucial for resolving EMI issues, improving device performance, enhancing product reliability, and shortening product development cycles and accelerating iterations.

[0032] In the field of electromagnetic interference source location, the main method currently used is scanning positioning technology based on a single scanning antenna. This method generally operates a scanning antenna to scan the space around the device or system to be tested point by point, measuring the electromagnetic signal strength at different locations, searching for the area with the most severe interference to roughly locate the electromagnetic interference source.

[0033] However, the above methods usually have the following disadvantages: slow positioning speed, because a single scanning antenna needs to scan a large spatial range point by point, which makes the entire positioning process time-consuming and difficult to meet the needs of rapid positioning, especially in time-sensitive project development, which may seriously delay the progress; and low accuracy, relying only on the signal strength received by a single antenna to judge the location of the interference source, which is easily affected by factors such as environmental reflection and multipath propagation, resulting in limited positioning accuracy and difficulty in accurately determining the specific location of the interference source; in addition, the environment is difficult to set up, and in order to obtain more accurate measurement results, it is often necessary to build a special electromagnetic shielding room or take other complex electromagnetic environment control measures, which increases the preliminary preparation work and cost of the test; in addition, the operation is complicated, and the scanning process requires professionals to perform delicate operations, which requires high skills and experience of the operator, and is also prone to introduce human errors, affecting the accuracy of the positioning results.

[0034] To solve some or all of the above-mentioned technical problems, an embodiment of the present application provides an electromagnetic interference source locating device and an electronic device, wherein the electromagnetic interference source locating device includes: an antenna array coupling board is provided with multiple antennas and multiple LED lights, the multiple antennas and the multiple LED lights correspond one to one, the target LED light is located in the opposite mapping direction of the corresponding target antenna, the target LED light is any one of the multiple LED lights, and the target antenna is the antenna corresponding to the target LED light among the multiple antennas; the target antenna is used to receive the electromagnetic signal of the electromagnetic interference source, and the target LED light is used to indicate the strength of the electromagnetic signal received by the target antenna through brightness; a single-pole multi-throw radio frequency switch is connected to each antenna on the antenna array coupling board, the single-pole multi-throw radio frequency switch is used to switch the switch state in sequence to connect different antennas, and transmit the electromagnetic signal received by each antenna to a spectrum analyzer for processing; the spectrum analyzer is used to receive the electromagnetic signal received by each antenna, analyze the electromagnetic signal, determine the electromagnetic signal strength information of each antenna; and send the electromagnetic signal strength information of each antenna to a processor; the processor is used to determine the location information of the electromagnetic interference source based on the electromagnetic signal strength information of each antenna and the positional relationship between each antenna. This electromagnetic interference source locating device uses efficient signal processing algorithms and positioning calculation methods to quickly determine the location of the electromagnetic interference source and improve work efficiency. In addition, combined with antenna arrays and advanced mathematical models, it can accurately calculate the location of the interference source and improve positioning accuracy. In addition, the brightness of the LED light indicates the location of the interference source, making it convenient for users to take timely measures to eliminate interference or conduct further analysis.

[0035] like Figure 1 As shown, Figure 1This is a structural diagram of an electromagnetic interference source locating device provided in an embodiment of the present application. The electromagnetic interference source locating device may include: an antenna array coupling plate 11, a single-pole multi-throw radio frequency switch 12, a spectrum analyzer 13, and a processor 14.

[0036] It should be noted that, from Figure 1 It can be seen that the single-pole multi-throw RF switch 12 is connected to the antenna array coupling plate 11, the single-pole multi-throw RF switch 12 is connected to the spectrum analyzer 13, and the processor 14 is connected to the antenna array coupling plate 11, the single-pole multi-throw RF switch 12 and the spectrum analyzer 13 respectively.

[0037] In some embodiments, the single-pole multi-throw RF switch 12 can be connected to the antenna on the antenna array coupling plate 11, and then the electromagnetic signal collected by the antenna is transmitted to the spectrum analyzer 13 through the single-pole multi-throw RF switch 12 for analysis, and then transmitted to the processor 14 for calculation to obtain the location of the electromagnetic interference source. In addition, the processor 14 can control the antenna on the antenna array coupling plate 11 to collect signals, and control the connection status between the single-pole multi-throw RF switch 12 and the antenna.

[0038] In some embodiments, as Figure 2 As shown, multiple antennas 111 and multiple LED lights 112 are respectively provided on the front and back surfaces of the antenna array coupling plate 11, and the multiple antennas 111 and the multiple LED lights 112 correspond one to one. The target LED light 112 is located in the opposite mapping direction of the corresponding target antenna 111. The target LED light 112 is any one of the multiple LED lights 112, and the target antenna 111 is the antenna 111 corresponding to the target LED light 112 among the multiple antennas 111; the target antenna 111 is used to receive the electromagnetic signal of the electromagnetic interference source, and the target LED light 112 is used to indicate the strength of the electromagnetic signal received by the target antenna through brightness.

[0039] in, Figure 2 a is a front view of the antenna array coupling plate 11, Figure 2 b is a rear view of the antenna array coupling plate 11, Figure 2 As can be seen from a, multiple antennas 111 arranged in an array can be seen on the front of the antenna array coupling plate 11, and Figure 2 b It can be seen that multiple LED lights 112 arranged in an array can be seen on the back of the antenna array coupling plate 11. The positions of the multiple antennas 111 and the multiple LED lights 112 are one-to-one corresponding, and each antenna 111 will map an LED light 112 in the vertical direction.

[0040] In some embodiments, the antenna array on the antenna array coupling board consists of multiple antennas, carefully designed to ensure high sensitivity and resolution for electromagnetic signals in space. The operating principle is that antennas in different locations can receive electromagnetic signals from various directions and angles. When there is an electromagnetic interference source in space, the electromagnetic signals it emits propagate in the form of electromagnetic waves. Each antenna in the antenna array receives electromagnetic signals of varying strengths depending on its position and direction.

[0041] In some embodiments, the antenna array coupling plate is equipped with an LED light in the opposite direction of the antenna's projection. The principle of this design is that when the electromagnetic signal is received by the antenna, the LED light can be made to display different on and off states and brightness levels according to the signal strength through a specific algorithm and circuit design. The stronger the electromagnetic signal, the brighter the corresponding LED light, thus intuitively displaying the area with the strongest electromagnetic signal. Compared with using a display screen, LED lights are less expensive and can meet the basic needs of quickly locating the source of electromagnetic interference.

[0042] It should be noted that Figure 2 It can be seen that the multiple antennas 111 on the antenna array coupling plate 11 are arranged in an array. In addition, the multiple LED lights 112 on the antenna array coupling plate 11 are also arranged in an array. The antenna array coupling plate 11 on which the multiple antennas 111 are located and the antenna array coupling plate 11 on which the multiple LED lights 112 are located can be the same antenna array coupling plate 11, or two antenna array coupling plates 11 can be parallel and overlapped. Each LED light 112 corresponds one-to-one with an antenna 111. Each antenna 111 is mapped to an LED light 112 in the vertical direction. The antenna 111 and LED light 112 are connected, and the LED light 112 can reflect the strength of the electromagnetic signal received by the antenna 111.

[0043] In an embodiment of the present application, a single-pole multi-throw RF switch 12 is connected to each antenna on the antenna array coupling plate 11. The single-pole multi-throw RF switch 12 is used to switch the switch state in sequence to connect different antennas, and transmit the electromagnetic signal received by each antenna to the spectrum analyzer 13 for processing.

[0044] A single-pole, multi-throw (SPMT) RF switch is connected to the antenna array coupling board. Its primary function is to serially acquire electromagnetic signals received by each antenna. Since the antenna array coupling board has multiple antennas, directly connecting each antenna to a spectrum analyzer would consume a significant number of spectrum analyzer port resources. However, a single-pole, multi-throw (SPMT) RF switch aggregates the signals collected by multiple antennas onto a single line. By controlling the switching of the RF switch, the electromagnetic signals received by each antenna are sequentially transmitted to the spectrum analyzer for processing and analysis. This approach conserves spectrum analyzer port resources while enabling sequential acquisition of signals from multiple antennas.

[0045] The single-pole, multi-throw (SPMT) RF switch is an important microwave device widely used in wireless communications, radar, test instruments, and other fields. It can transmit one of multiple RF input signals to an output path, thereby achieving flexible signal distribution and transmission. A single-pole, multi-throw (SPMT) RF switch is an RF switch with multiple inputs and one output, which can switch any input signal to the output according to a control signal. Depending on the number of inputs, SPMT RF switches can be divided into single-pole, double-throw (SPDT), single-pole, three-throw (SP3T), single-pole, four-throw (SP4T), and even have more outputs, such as single-pole, eight-throw (SP8T). Of course, the number of inputs is the number of antennas arrayed on the antenna array coupling board. The SPMT RF switch can be connected to any antenna.

[0046] It should be noted that since the single-pole multi-throw RF switch is connected to the antenna array coupling board and the spectrum analyzer respectively, after the single-pole multi-throw RF switch is connected to an antenna on the antenna array coupling board, the electromagnetic signal received by the antenna can be collected and then transmitted to the spectrum analyzer for analysis through the single-pole multi-throw RF switch.

[0047] For example, assume that there are four antennas arranged in an array on the antenna array coupling board, namely antenna A, antenna B, antenna C and antenna D. When antenna A collects electromagnetic signal A, the single-pole multi-throw RF switch can be connected to antenna A so that the electromagnetic signal A is transmitted to the spectrum analyzer through the single-pole multi-throw RF switch; similarly, when antenna B collects electromagnetic signal B, the single-pole multi-throw RF switch can be connected to antenna B so that the electromagnetic signal B is transmitted to the spectrum analyzer through the single-pole multi-throw RF switch; similarly, when antenna C collects electromagnetic signal C, the single-pole multi-throw RF switch can be connected to antenna C so that the electromagnetic signal C is transmitted to the spectrum analyzer through the single-pole multi-throw RF switch; similarly, when antenna D collects electromagnetic signal D, the single-pole multi-throw RF switch can be connected to antenna D so that the electromagnetic signal D is transmitted to the spectrum analyzer through the single-pole multi-throw RF switch.

[0048] In the embodiment of the present application, the spectrum analyzer 13 is used to receive the electromagnetic signal received by each antenna, analyze the electromagnetic signal, determine the electromagnetic signal strength information of each antenna; and send the electromagnetic signal strength information of each antenna to the processor 14.

[0049] A spectrum analyzer, also known as a frequency domain oscilloscope, tracking oscilloscope, analyzing oscilloscope, harmonic analyzer, frequency characteristics analyzer, or Fourier analyzer, is primarily used to measure signal parameters such as distortion, modulation, spectral purity, frequency stability, and intermodulation distortion. It can analyze electrical signals across the entire radio frequency band, from very low frequencies to submillimeter waves, and is an indispensable tool in modern electronic measurement.

[0050] Spectrum analyzers operate on the principle of heterodyning, where an unknown signal is mixed with a reference signal of known frequency (local oscillator, LO) to produce a lower-frequency difference signal. This signal is measured by specialized filters and detectors and displayed on a display. Modern spectrum analyzers, particularly those based on fast Fourier transform (FFT), directly sample the input signal digitally and then perform FFT processing to obtain a spectral distribution.

[0051] Spectrum analyzers are widely used in the radio frequency field, including but not limited to: measurement of radiation field strength of satellite receiving systems, radio communication systems, and mobile phone system base stations; detection and analysis of high-frequency signals such as electromagnetic interference; electromagnetic compatibility measurement of electronic products; signal source output signal quality detection; and security fields such as anti-wireless eavesdropping.

[0052] In some embodiments, when an electromagnetic interference source appears in the environment, the electromagnetic signal it releases spreads outward. Then, the intensity of the electromagnetic signal received by the antenna closer to the electromagnetic interference source will be stronger, and the intensity of the electromagnetic signal received by the antenna farther from the electromagnetic interference source will be weaker. Therefore, the spectrum analyzer can analyze the electromagnetic signal transmitted by each antenna to obtain the signal strength information, so that the processor can determine the location of the electromagnetic interference source based on the strength information.

[0053] In the embodiment of the present application, the processor 14 is configured to determine the location information of the electromagnetic interference source based on the electromagnetic signal strength information of each antenna and the positional relationship between each antenna.

[0054] It should be noted that since the position of each antenna on the antenna array coupling plate is fixed and known, after the processor obtains the electromagnetic signal strength information corresponding to each antenna, it can combine the positional relationship between each antenna and select an appropriate algorithm to obtain the location information of the electromagnetic interference source.

[0055] In some embodiments, after the processor receives the electromagnetic signal strength information of each antenna output by the spectrum analyzer, the processor combines the geometric position of the antenna array and the known spatial coordinate relationship, and uses a specific mathematical model and algorithm to perform calculations. Taking the triangulation positioning method as an example, the position coordinates of the electromagnetic interference source can be determined by measuring the difference in electromagnetic signal strength received by antennas at different positions, as well as the distance and relative position relationship between known antennas.

[0056] In some embodiments, the processor 14 is specifically used to determine the antennas in the corresponding area based on the location information of the electromagnetic interference source and the positional relationship between the multiple antennas; and control the brightness of the LED lights in the corresponding area through a preset dimming algorithm.

[0057] It should be noted that since the brightness of the LED light can reflect the strength of the electromagnetic signal collected by the corresponding antenna, after the processor obtains the electromagnetic signal strength information of each antenna and determines the location of the electromagnetic interference source, it can reflect the electromagnetic signal strength information of each antenna and the location of the electromagnetic interference source on the brightness of the LED light. In other words, the stronger the electromagnetic signal strength information, the closer the antenna is to the electromagnetic interference source, so the processor can make the brightness of the antenna in the corresponding area higher; similarly, the weaker the electromagnetic signal strength information, the farther the antenna is from the electromagnetic interference source, so the processor can make the brightness of the antenna in the corresponding area lower.

[0058] In some embodiments, the preset dimming algorithm may be a PWM dimming algorithm, which is a pulse width modulation (Pulse Width Modulation) dimming algorithm, and is a technology that adjusts the brightness of the screen by controlling the ratio of the time when the screen is bright and dark within a unit cycle. The core of the PWM dimming algorithm is to control the output power of the power equipment or achieve other control goals by changing the width (duty cycle) of the pulse. In the field of screen dimming, the PWM dimming algorithm adjusts the brightness of the screen by controlling the ratio of the time when the screen is bright and dark within each cycle, that is, controlling the duty cycle of the screen's light emission. Specifically, when the duty cycle is large, the screen is in the bright state for a longer time within the cycle, so the brightness is higher; conversely, when the duty cycle is small, the screen is in the dark state for a longer time within the cycle, and the brightness is lower. That is to say, in the embodiment of the present application, the processor can adjust the brightness of the LED lamp by adjusting the pulse duty cycle of the LED lamp. Specifically, when the electromagnetic signal strength information of the antenna corresponding to the LED lamp is stronger, that is, the closer to the electromagnetic interference source, the pulse duty cycle of the LED lamp is increased, so that the brightness of the LED lamp is higher; when the electromagnetic signal strength information of the antenna corresponding to the LED lamp is weaker, that is, the farther away from the electromagnetic interference source, the pulse duty cycle of the LED lamp is reduced, so that the brightness of the LED lamp is lower.

[0059] In some embodiments, the processor 14 is specifically configured to send an instruction to the SPMT RF switch 12 , so that the SPMT RF switch 12 switches to the corresponding antenna according to the instruction to transmit the electromagnetic signal.

[0060] It's important to note that the antenna continuously receives electromagnetic signals, but whether the spectrum analyzer collects these signals is controlled by the processor. Specifically, the processor controls the switching of the antenna array, sending instructions to the single-pole multi-throw (SPMT) RF switch to determine which antenna's signal is collected. The processor also controls the start and stop of signal collection, ensuring that signal collection occurs at the appropriate time. In other words, the processor can send a command to the SPMT RF switch, instructing it to connect to a specific antenna, allowing the electromagnetic signal received by that antenna to be transmitted to the spectrum analyzer. The processor can then send another command to the SPMT RF switch, instructing it to connect to another antenna, allowing the electromagnetic signal received by that antenna to be transmitted to the spectrum analyzer, and so on.

[0061] In some embodiments, the spectrum analyzer 13 is specifically used to filter the electromagnetic signal of each antenna through a filter, and amplify the filtered signal to obtain the target electromagnetic signal of each antenna; and, analyze the target electromagnetic signal of each antenna to determine the electromagnetic signal strength information of each antenna.

[0062] It should be noted that before determining the electromagnetic signal strength information, the spectrum analyzer can also pre-process the electromagnetic signal, that is, first filter the input electromagnetic signal to remove noise and interference, and then amplify the filtered signal to improve the signal strength and resolution.

[0063] Specifically, when filtering electromagnetic signals, different types of filters, such as low-pass filters, high-pass filters, and band-pass filters, can be used. Appropriate filter parameters should be selected based on the actual situation to preserve as many useful electromagnetic signal components as possible. When amplifying the filtered electromagnetic signal, the amplification factor should be adjusted appropriately based on the signal strength and the dynamic range of the spectrum analyzer to avoid signal oversaturation or under-amplification.

[0064] In some embodiments, after filtering and amplifying the electromagnetic signal, the spectrum analyzer 13 is specifically used to convert the target electromagnetic signal of each antenna into a frequency domain electromagnetic signal, and obtain the spectrum distribution information corresponding to the frequency domain electromagnetic signal of each antenna through fast Fourier transform; and, based on the spectrum distribution information, determine the electromagnetic signal strength information of each antenna.

[0065] It should be noted that by converting the time domain electromagnetic signal into the frequency domain signal through the Fast Fourier Transformation (FFT) algorithm, the spectrum distribution information of the signal can be obtained. The basic principle of the FFT algorithm is to decompose the signal into a combination of sine and cosine waves of different frequencies, so that the component and intensity of the signal at different frequencies can be analyzed.

[0066] It should be noted that when normal interference RF signals occur, the specific frequency of the interference can be determined. For example, if the interference occurs in the 2G signal GSM850 band, the frequency that can be interfered with is only 869Mhz-894Mhz. Therefore, it is necessary to find the interference source with strong noise at this frequency. To do this, it is necessary to convert a signal from the time domain to the frequency domain and analyze it in the frequency domain.

[0067] In some embodiments, the fast Fourier transform is an efficient algorithm for calculating the discrete Fourier transform (DFT) and its inverse transform. The DFT is an important tool in the field of signal processing and is used to convert signals from the time domain to the frequency domain. The FFT reduces the computational complexity, making the calculation of the DFT feasible in practical applications. The FFT algorithm utilizes the symmetry and periodicity in the DFT and decomposes the DFT into smaller DFTs through a divide-and-conquer strategy, thereby significantly reducing the amount of computation. The basic idea of ​​the FFT algorithm is to decompose the DFT input sequence x[n] into two subsequences with even and odd indices, and then calculate the DFTs of the two subsequences separately. Finally, the results of the two DFTs are combined in some way to obtain the DFT of the original sequence.

[0068] In some embodiments, the spectrum distribution information may include: spectrum amplitude and frequency resolution. That is, when determining the electromagnetic signal strength information of each antenna based on the spectrum distribution information, the electromagnetic signal strength information of each antenna may be determined based on the spectrum amplitude and frequency resolution.

[0069] In an embodiment of the present application, the spectrum analyzer 13 is specifically used to determine the frequency resolution of the spectrum analysis based on the sampling frequency and the number of points of the fast Fourier transform; and based on the frequency resolution, determine the spectrum amplitude value corresponding to each frequency point; and based on the spectrum amplitude value, determine the electromagnetic signal strength information of each antenna.

[0070] It should be noted that the amplitude of the frequency domain signal after FFT can be calculated to obtain the amplitude value of the signal at each frequency point. Amplitude calculation can be performed using methods such as absolute value and square, and the appropriate calculation method should be selected according to actual needs. In addition, the frequency resolution of spectrum analysis can be determined based on the sampling frequency and the number of FFT points. The frequency resolution determines the minimum frequency interval that can be distinguished and is very important for analyzing the fine structure of electromagnetic signals.

[0071] In some embodiments, determining electromagnetic signal strength information of each antenna based on the spectrum amplitude value may generally include at least the following two implementations:

[0072] Implementation method 1: The spectrum analyzer 13 is specifically configured to determine a peak point of a preset frequency band according to a spectrum amplitude value, and determine the peak point as electromagnetic signal strength information of the preset frequency band.

[0073] It should be noted that peaks are detected in the spectrum amplitude. These peaks typically correspond to stronger frequency components in the electromagnetic signal, and thus can be used to represent electromagnetic signal strength information. Specifically, simple comparison methods or more complex peak detection algorithms, such as threshold-based peak detection and adaptive peak detection, can be used.

[0074] Implementation method 2: The spectrum analyzer 13 is specifically configured to determine the average power of a preset frequency band according to the spectrum amplitude value, and determine the average power as the electromagnetic signal strength information of the preset frequency band.

[0075] It should be noted that in addition to peak detection, the average power of the electromagnetic signal can also be calculated to reflect the overall strength of the electromagnetic signal. The average power can be obtained by integrating or summing the spectrum amplitude and then dividing it by the total length or frequency range of the signal.

[0076] It should be noted that both of the above two implementation methods can calculate the electromagnetic signal strength information within a frequency band respectively. The frequency band can be the entire frequency band collected or a part of it. The embodiment of this application does not make specific limitations.

[0077] In some embodiments, the spectrum analyzer 13 outputs the analyzed electromagnetic signal strength information of each antenna on the antenna array coupling plate 11 to the processor 14. The output electromagnetic signal strength information may specifically include parameters such as the frequency, amplitude, and strength of the electromagnetic signal, as well as the corresponding antenna number or location information on the antenna array coupling plate 11. The processor 14 can further process and calculate based on this information to determine the location of the electromagnetic interference source.

[0078] In some embodiments, the spectrum analyzer 14 is further used to determine that the electromagnetic signal received by the target antenna is a strong signal when it is detected that the electromagnetic signal strength information of the target antenna is greater than a preset strength threshold; or to determine that the electromagnetic signal received by the target antenna is a strong signal when it is detected that the ratio between the electromagnetic signal strength information of the target antenna and the background noise is greater than a preset strength ratio.

[0079] It should be noted that the preset intensity threshold and the preset intensity ratio can be set according to the actual application scenario or application requirements and can be adjusted. In other words, when performing intensity judgment, an absolute intensity threshold can be set for judgment, or a relative intensity ratio can be set for judgment, which is not specifically limited in the embodiments of the present application.

[0080] In some embodiments, when the electromagnetic interference source locating device is used to determine the location of the electromagnetic interference source, the implementation steps may include: controlling the single-pole multi-throw radio frequency switch to connect the scanning antenna in sequence to scan point by point, and recording the electromagnetic signal of each scanning point in real time to complete data collection of all scanning points; analyzing the collected data to determine the maximum signal strength; inferring the location of the electromagnetic interference source based on the maximum value position; and controlling the LED light corresponding to the antenna with the strongest signal strength to light up.

[0081] An embodiment of the present application provides an electromagnetic interference source locating device, which includes: multiple antennas and multiple LED lights are arranged on an antenna array coupling board, the multiple antennas and the multiple LED lights correspond one to one, the target LED light is located in the opposite mapping direction of the corresponding target antenna, the target LED light is any one of the multiple LED lights, and the target antenna is the antenna corresponding to the target LED light among the multiple antennas; the target antenna is used to receive the electromagnetic signal of the electromagnetic interference source, and the target LED light is used to indicate the strength of the electromagnetic signal received by the target antenna through brightness; a single-pole multi-throw radio frequency switch is connected to each antenna on the antenna array coupling board, the single-pole multi-throw radio frequency switch is used to switch the switch state in sequence to connect different antennas, and transmit the electromagnetic signal received by each antenna to a spectrum analyzer for processing; the spectrum analyzer is used to receive the electromagnetic signal received by each antenna, analyze the electromagnetic signal, determine the electromagnetic signal strength information of each antenna; and send the electromagnetic signal strength information of each antenna to a processor; the processor is used to determine the location information of the electromagnetic interference source based on the electromagnetic signal strength information of each antenna and the positional relationship between each antenna. This electromagnetic interference source locating device uses efficient signal processing algorithms and positioning calculation methods to quickly determine the location of the electromagnetic interference source and improve work efficiency. In addition, combined with antenna arrays and advanced mathematical models, it can accurately calculate the location of the interference source and improve positioning accuracy. In addition, the brightness of the LED light indicates the location of the interference source, making it convenient for users to take timely measures to eliminate interference or conduct further analysis.

[0082] like Figure 3 As shown, the embodiment of the present application further provides an electronic device, which may include: Figure 1 The electromagnetic interference source locating device shown.

[0083] In this application, the processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0084] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article or device. In the absence of further limitations, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0085] It should be understood that “one embodiment” or “an embodiment” mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, “in one embodiment” or “in an embodiment” appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also know that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for this application. The above-mentioned multiple embodiments are not necessarily multiple independent embodiments. Dividing them into multiple embodiments is only used to highlight the different technical features in different embodiments. Those skilled in the art should know that the above-mentioned multiple embodiments can also be combined in any combination.

[0086] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0087] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of these units may be selected based on actual needs to achieve the objectives of this embodiment.

[0088] In addition, the functional units in the embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0089] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-accessible memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a memory and includes several requests for a computer device (which can be a personal computer, server or network device, etc., specifically a processor in a computer device) to execute some or all of the steps of the above-mentioned methods of various embodiments of the present application.

[0090] The above are merely specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to these embodiments herein, but is intended to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. An electromagnetic interference source locating device, characterized in that: The electromagnetic interference source locating device comprises: An antenna array coupling board, wherein a plurality of antennas and a plurality of LED lights are provided on the antenna array coupling board, wherein the plurality of antennas and the plurality of LED lights correspond one to one, and a target LED light is located in an opposite mapping direction of the corresponding target antenna, wherein the target LED light is any one of the plurality of LED lights, and the target antenna is the antenna among the plurality of antennas corresponding to the target LED light; the target antenna is configured to receive an electromagnetic signal from an electromagnetic interference source, and the target LED light is configured to indicate the strength of the electromagnetic signal received by the target antenna by brightness; A single-pole multi-throw radio frequency switch, connected to each antenna on the antenna array coupling board, configured to sequentially switch between different antennas and transmit electromagnetic signals received by each antenna to a spectrum analyzer for processing; The spectrum analyzer is configured to receive the electromagnetic signal received by each antenna, analyze the electromagnetic signal, determine the electromagnetic signal strength information of each antenna, and send the electromagnetic signal strength information of each antenna to the processor; The processor is configured to determine the location information of the electromagnetic interference source based on the electromagnetic signal strength information of each antenna and the positional relationship between each antenna.

2. The device according to claim 1, characterized in that The spectrum analyzer is specifically used to filter the electromagnetic signal of each antenna through a filter and amplify the filtered signal to obtain the target electromagnetic signal of each antenna; and analyze the target electromagnetic signal of each antenna to determine the electromagnetic signal strength information of each antenna.

3. The device according to claim 2, characterized in that The spectrum analyzer is specifically used to convert the target electromagnetic signal of each antenna into a frequency domain electromagnetic signal, and obtain the spectrum distribution information corresponding to the frequency domain electromagnetic signal of each antenna through fast Fourier transform; and determine the electromagnetic signal strength information of each antenna based on the spectrum distribution information.

4. The device according to claim 3, characterized in that The spectrum analyzer is specifically used to determine the frequency resolution of the spectrum analysis based on the sampling frequency and the number of fast Fourier transform points; and determine the spectrum amplitude value corresponding to each frequency point based on the frequency resolution; and determine the electromagnetic signal strength information of each antenna based on the spectrum amplitude value.

5. The device according to claim 4, characterized in that The spectrum analyzer is specifically configured to determine a peak point of a preset frequency band according to the spectrum amplitude value, and determine the peak point as electromagnetic signal strength information of the preset frequency band.

6. The device according to claim 4, characterized in that The spectrum analyzer is specifically configured to determine an average power of a preset frequency band according to the spectrum amplitude value, and determine the average power as the electromagnetic signal strength information of the preset frequency band.

7. The device according to claim 4, characterized in that The spectrum analyzer is further used to determine that the electromagnetic signal received by the target antenna is a strong signal when it is detected that the electromagnetic signal strength information of the target antenna is greater than a preset strength threshold; or to determine that the electromagnetic signal received by the target antenna is a strong signal when it is detected that the ratio between the electromagnetic signal strength information of the target antenna and the background noise is greater than a preset strength ratio.

8. The device according to claim 1, characterized in that The processor is specifically used to determine the antennas in the corresponding area based on the location information of the electromagnetic interference source and the positional relationship between the multiple antennas; and control the brightness of the LED lights in the corresponding area through a preset dimming algorithm.

9. The device according to claim 1, characterized in that The processor is specifically configured to send an instruction to the single-pole multi-throw radio frequency switch, so that the single-pole multi-throw radio frequency switch switches to the corresponding antenna according to the instruction to transmit the electromagnetic signal.

10. An electronic device, characterized in that: The electronic device comprises: the electromagnetic interference source locating device according to any one of claims 1 to 9.

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