CN112165365B - Wireless spectrum interference monitoring system and method for low-frequency time code monitoring system - Google Patents
Wireless spectrum interference monitoring system and method for low-frequency time code monitoring system Download PDFInfo
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Abstract
The invention discloses a wireless spectrum interference monitoring system and a method for a low-frequency time code monitoring system, wherein the system comprises: the antenna module is used for carrying out omnidirectional receiving on electromagnetic interference signals in the surrounding environment of the low-frequency time code monitoring system aiming at a preset monitoring frequency band; the frequency spectrum acquisition module is used for amplifying the signals received by the antenna module, sampling the signals, and filtering the signals to obtain the power and frequency points of each signal in a preset monitoring frequency band; the data analysis module is used for inputting the signal power acquired by the frequency spectrum acquisition module to realize power value statistics of the interference signal and study and judgment of the interference signal; a support module to provide power supply and rack support for the wireless-spectrum interference monitoring system. According to the invention, the wireless spectrum interference monitoring in the low frequency band can be realized by setting the relative reference value and counting the signal variation trend.
Description
Technical Field
The invention belongs to the technical field of radio communication and signal measurement, relates to wireless spectrum interference monitoring, and particularly relates to a wireless spectrum interference monitoring system and method for a low-frequency time code monitoring system.
Background
The wireless spectrum monitoring is a basic and core function of wireless spectrum management, and only if accurate, detailed and timely wireless spectrum monitoring is established, the wireless spectrum management can ensure the scientificity and effectiveness of the wireless spectrum monitoring. For a low-frequency time code monitoring system, the main purpose of setting wireless spectrum interference monitoring is to monitor a complex electromagnetic environment from time domain, frequency domain, energy and other dimensions by acquiring, processing, analyzing and mining information of all signals in a low-frequency band without loss and distortion, and have the functions of predicting and alarming sudden interference and spectrum situation change and the like.
Currently, there is no method or technique related to wireless spectrum monitoring in a low frequency time code monitoring system. In other radio monitoring fields, a general method related to frequency spectrum monitoring is to sweep frequency of a signal in a certain frequency band, set a threshold value for each frequency point, compare the frequency point and power of the signal with the signal in an established database, if a known signal breaks through the threshold value, store the monitoring result, and if an unknown signal breaks through the threshold value, send out corresponding alarm information. However, the existing conventional method for the low frequency time code monitoring system has the following problems:
(1) the method is not a special method provided for a low-frequency time code monitoring system, the low-frequency time code monitoring system not only realizes the precise measurement of the low-frequency time code timing signal, but also needs to evaluate the timing performance and the signal quality of the low-frequency time code timing signal by combining the current electromagnetic environment condition, so that a corresponding wireless spectrum interference monitoring method needs to be designed for the actual monitoring content of the low-frequency time code monitoring system;
(2) the general method of wireless spectrum monitoring is to set a signal power threshold, and if the signal breaks through the threshold, the monitoring system sends an alarm prompt. Because the signal power or the field intensity is related to the transmitting power of the transmitter, when the receiving end is positioned at different distances, the measured signal power is different; in addition, when the monitoring environment changes, the measured signal powers are also different, and the threshold value needs to be adjusted at any time, which brings inconvenience to the signal monitoring work.
In view of the foregoing, a need exists for a new wireless spectrum interference monitoring system and method for a low frequency time code monitoring system.
Disclosure of Invention
The present invention is directed to a wireless spectrum interference monitoring system and method for a low frequency time code monitoring system, so as to solve one or more of the above technical problems. According to the invention, the wireless spectrum interference monitoring in the low frequency band can be realized by setting the relative reference value and counting the signal variation trend.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to a wireless spectrum interference monitoring system for a low-frequency time code monitoring system, which comprises:
the antenna module is used for carrying out omnidirectional receiving on electromagnetic interference signals in the surrounding environment aiming at a preset monitoring frequency band;
the frequency spectrum acquisition module is used for amplifying the signals received by the antenna module, sampling the signals, and filtering the signals to obtain the power and frequency point information of each signal in a preset monitoring frequency band;
the data analysis module is used for inputting the signal power acquired by the frequency spectrum acquisition module to realize power value statistics of the interference signal and study and judgment of the interference signal;
a support module to provide power supply and rack support for the wireless-spectrum interference monitoring system.
The invention further improves the method and also comprises the following steps:
the network communication module is used for transmitting the interference information from the external field monitoring station to the monitoring master station;
and the database module is used for storing the wireless spectrum interference monitoring data and corresponding alarm information.
The invention is further improved in that the antenna module adopts an omnidirectional active antenna; the effective operating frequency range of the antenna is 9kHz to 100 kHz.
The further improvement of the present invention is that, in the spectrum acquisition module, after amplifying the signal received by the antenna module, the signal is sampled, and after filtering, the specific steps of obtaining the power and frequency point of each signal in the preset monitoring frequency band include:
the method comprises the steps of receiving and measuring signal parameters in a range from 9kHz to 100kHz through interference signal acquisition equipment, detecting signals after filtering and amplifying, analyzing obtained envelope signals, and obtaining power and frequency points of each signal in a preset monitoring frequency band.
In a further improvement of the present invention, in the data analysis module, the specific step of studying and judging the interference signal includes:
and aiming at a certain frequency point, comparing the current signal power serving as a reference value with a next monitoring result, counting the signal power variation trend of a preset time period, calculating the average value and the standard deviation of the signal power value, and judging as an interference signal if the signal shows continuous high-power output in the preset time period.
The further improvement of the present invention is that, in the data analysis module, the specific steps of power value statistics of the interference signal include: firstly, judging the validity of a receipt, and then extracting valid data; performing gross error rejection and smooth filtering on the effective data, and selecting a frequency point with a power value of more than or equal to 68.5 kHz; recording the current measurement result of the selected frequency point, including: interference signal frequency point, interference signal power, interference occurrence time and duration.
The invention discloses a wireless spectrum interference monitoring method for a low-frequency time code monitoring system, which comprises the following steps of:
step 1, dividing signals to be received into two frequency bands according to different frequency bands; frequency sweeping is carried out on the two frequency bands simultaneously through frequency spectrum analysis equipment, and frequency sweeping intervals are set to obtain measurement data; the measurement data comprises frequency points and signal power of signals;
step 2, based on the measured data in the step 1, eliminating data in a preset frequency band, counting measured data of other frequency point signals, and searching and determining a frequency point of which the signal power is higher than that of a low-frequency time code time service signal;
step 3, while continuing to sweep frequency, analyzing a sweep frequency result, and recording frequency points with power more than or equal to a preset value; taking the previous signal power measurement result as a reference value, comparing the previous signal power measurement result with the current signal power, and if the current measurement result is greater than the reference value, setting the current measurement result as the reference value; continuously iterating the frequency sweeping result, and calculating the average value and the standard deviation of the signal power value in a preset time period to obtain the signal power variation trend;
step 4, taking the power value of the 68.5kHz frequency point as a reference, if the signal power of a certain frequency point is continuously kept to be higher than the power value of the 68.5kHz frequency point in a preset time period, determining that the signal is an interference signal; and sending out alarm information.
The invention further improves the method and also comprises the following steps:
step 5, establishing an interference monitoring database, and recording and storing interference monitoring data; wherein the interference monitoring data comprises: power, frequency point, bandwidth, time of occurrence, and duration of the interfering signal.
A further development of the invention is that,
in the step 1, the signals to be received are 9kHz-100kHz signals and are divided into two frequency bands which are more than or equal to 9kHz and less than 30kHz, more than or equal to 30kHz and less than or equal to 100 kHz;
in the step 2, a preset frequency band is a 67.5kHz-69.5kHz band;
in step 3, the preset value is 68.5 kHz.
The further improvement of the present invention is that, in step 4, the specific steps when the alarm information is sent out include: and performing alarm grade division on the signals and executing corresponding alarm operation.
Compared with the prior art, the invention has the following beneficial effects:
the invention is suitable for a low-frequency time code monitoring system, realizes wireless spectrum monitoring by adopting the design of a relative reference value, pays more attention to the change trend of a signal in a certain time period and counts the signal characteristics compared with the specific instantaneous value of a certain signal. Specifically, the present invention does not specifically set the threshold value of the interference signal; for a specific signal, comparing a previous measured value serving as a reference with a next measured value, continuously updating the reference value in an iterative manner, and focusing attention on the signal change trend; and counting the signal change rule in a period of time, if the signal shows continuous high-power output, judging the signal as an interference signal, and giving an alarm (the alarm can be given by using methods such as sound, light, voice and the like, and the interference information is stored). The method can realize continuous monitoring of the wireless spectrum interference signal, has the functions of evaluating the interference degree of an interference source, providing a certain degree of strategy analysis support capability and realizing long-time storage of monitoring information. The method has the characteristics of accurate interference signal positioning and high measurement accuracy; in addition, the cost is low, the implementation is easy, and the system operation reliability is good.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below; it is obvious that the drawings in the following description are some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic diagram of a wireless spectrum interference monitoring system for a low frequency time code monitoring system according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a method for monitoring interference in a wireless spectrum for a low frequency time code monitoring system according to an embodiment of the present invention.
Detailed Description
In order to make the purpose, technical effect and technical solution of the embodiments of the present invention clearer, the following clearly and completely describes the technical solution of the embodiments of the present invention with reference to the drawings in the embodiments of the present invention; it is to be understood that the described embodiments are only some of the embodiments of the present invention. Other embodiments, which can be derived by one of ordinary skill in the art from the disclosed embodiments without inventive faculty, are intended to be within the scope of the invention.
Referring to fig. 1, a wireless spectrum interference monitoring system for a low frequency time code monitoring system according to an embodiment of the present invention includes:
and the antenna module is used for omni-directionally receiving the electromagnetic interference signals in the surrounding environment of the low-frequency time code monitoring system aiming at the monitoring frequency band by using the omni-directional active antenna. The working frequency range of the antenna is 9kHz to 100 kHz.
And the frequency spectrum acquisition module is mainly composed of signal frequency spectrum acquisition equipment, and is used for filtering and amplifying the 9kHz-100kHz signals received by the antenna, sampling the signals and facilitating the analysis of the monitored data in the next step.
And the data analysis module consists of an industrial personal computer and upper computer software, and the upper computer software can realize the functions of analyzing, processing and displaying the interference frequency spectrum, analyzing and predicting the interference degree and replaying information. Through the statistics and processing of the monitored power value of the interference signal, a frequency point with a power value greater than 68.5kHz in a frequency band of 9kHz-100kHz is selected, and relevant information of the frequency point is recorded. And comparing the current monitoring result serving as a reference value with the next monitoring result, counting the signal power variation trend within a period of time, calculating the average value and standard deviation of the signal power value, judging as an interference signal if the signal shows continuous high-power output within a period of time (15min), and sending corresponding alarm information.
And the support module provides power supply and an equipment frame, and ensures uninterrupted normal operation of equipment.
In the embodiment of the invention, the method further comprises the following steps:
if the network communication module is set in the external monitoring station, the interference information needs to be sent to the monitoring master station, and the network communication module can be used for transmitting data.
And the database module is used for storing the wireless spectrum interference monitoring data and corresponding alarm information.
The invention is set for a low-frequency time code monitoring system, realizes wireless spectrum monitoring by adopting a concept designed relative to a reference value, pays more attention to the change trend of a signal in a certain time period and counts the signal characteristics of the signal relative to the instantaneous value of a specific signal. The method has the advantages of accurate interference signal positioning, high measurement accuracy, easy realization, lower cost, reliable system operation and the like.
Referring to fig. 2, a method for monitoring radio spectrum interference in a low frequency time code monitoring system according to an embodiment of the present invention includes the following steps:
(1) the antenna module, the frequency spectrum analysis module and an upper computer carrying the data analysis module are connected to ensure the normal operation of the system;
(2) dividing a 9kHz-100kHz signal to be received into two frequency bands of 9 kHz-30 kHz (VLF band) and 30 kHz-100kHz (LF band) frequency spectrum analysis equipment for simultaneously sweeping the two frequency bands at a sweep frequency interval of 10Hz according to different frequency bands, and measuring and storing frequency points and signal power of the signal in detail;
(3) the signal bandwidth of the low-frequency time code time service signal is +/-1 kHz, the central frequency point is 68.5kHz, therefore, data in a 67.5kHz-69.5kHz section are removed, the measurement data of other frequency point signals are counted, and the frequency point of which the signal power is higher than that of the low-frequency time code time service signal is searched and determined;
(4) while the system continues to sweep frequency, analyzing a sweep frequency result, recording a frequency point with the power being more than 68.5kHz, using a previous measurement result as a reference value by software, comparing the time with a next measurement result, if the previous measurement result is more than the reference value, setting the previous measurement result as a new reference value, continuously iterating the sweep frequency result, counting the signal power variation trend within a period of time, and calculating the average value and the standard deviation of the signal power value;
(5) if the frequency point continuously outputs high power within a certain period of time (15min), the frequency point is judged to be an interference signal, alarm grade division is carried out on the signal, corresponding alarm operation is executed, and the alarm information is stored. In addition, counting the power values of other frequency points in the sweep frequency range, outputting the power values and storing the information of the frequency points;
(6) if the interference monitoring system is set up in an external monitoring station, the alarm operation information needs to be sent to a monitoring main station through a network communication module;
(7) and establishing an interference monitoring database, recording and storing interference monitoring data (power, frequency point, bandwidth and occurrence time of an interference signal), and facilitating secondary utilization of the data in the future.
In the embodiment of the invention, the specific steps when the alarm information is sent out comprise: and performing alarm grade division on the signals and executing corresponding alarm operation.
Wherein, the alarm grade division comprises:
1) if the frequency point is out of the range of 58.5 kHz-72.5 kHz, judging that four-level alarm is given, and prompting alarm information by software at the moment;
2) if the duration of the interference signal is concerned within the range of 58.5 kHz-72.5 kHz, if only one day occurs, judging to be a three-level alarm, executing corresponding alarm operation, and recording the alarm operation to a database;
3) if the signal occurs more than one day within the range of 58.5 kHz-72.5 kHz, calling interference monitoring information stored in a database at the moment, if the signal periodically appears, judging that secondary alarm is performed, executing corresponding alarm operation, and recording the alarm operation to the database;
4) if the alarm occurs more than one day within the range of 58.5 kHz-72.5 kHz and the signal is found to randomly occur after the inquiry of the database, the alarm is judged as a primary alarm, corresponding alarm operation is executed, and the alarm operation is recorded to the database.
When the alarm level is improved, the alarm operation of the lower layer is executed simultaneously; when the alarm is in the first-level alarm, all alarm operations are executed simultaneously.
The method can realize continuous monitoring of the wireless spectrum interference signal, has the functions of evaluating the interference degree of an interference source, providing a certain degree of strategy analysis support capability and realizing long-time storage of monitoring information. The method has the characteristics of accurate interference signal positioning and high measurement accuracy; in addition, the cost is low, the implementation is easy, and the system operation reliability is good.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can make modifications and equivalents to the embodiments of the present invention without departing from the spirit and scope of the present invention, which is set forth in the claims of the present application.
Claims (10)
1. A wireless spectrum interference monitoring method for a low-frequency time code monitoring system is characterized by comprising the following steps:
step 1, dividing signals to be received into two frequency bands according to different frequency bands; frequency sweeping is carried out on the two frequency bands simultaneously through frequency spectrum analysis equipment, and frequency sweeping intervals are set to obtain measurement data; the measurement data comprises a frequency point and signal power of a signal;
step 2, based on the measured data in the step 1, eliminating data in a preset frequency band, counting measured data of other frequency point signals, and searching and determining a frequency point of which the signal power is higher than that of a low-frequency time code time service signal;
step 3, while continuing to sweep frequency, analyzing a sweep frequency result, and recording frequency points with power more than or equal to a preset value; taking the previous signal power measurement result as a reference value, comparing the previous signal power measurement result with the current signal power, and if the current measurement result is greater than the reference value, setting the current measurement result as the reference value; continuously iterating the frequency sweeping result, and calculating the average value and the standard deviation of the signal power value in a preset time period to obtain the signal power variation trend;
step 4, taking the power value of the 68.5kHz frequency point as a reference, if the signal power of a certain frequency point is continuously kept to be higher than the power value of the 68.5kHz frequency point in a preset time period, determining that the signal is an interference signal; and sending out alarm information.
2. The method of claim 1, further comprising:
step 5, establishing an interference monitoring database, and recording and storing interference monitoring data; wherein the interference monitoring data comprises: power, frequency point, bandwidth, time of occurrence, and duration of the interfering signal.
3. The wireless-spectrum interference monitoring method for low-frequency time-code monitoring system according to claim 1,
in the step 1, the signals to be received are 9kHz-100kHz signals and are divided into two frequency bands which are more than or equal to 9kHz and less than 30kHz, more than or equal to 30kHz and less than or equal to 100 kHz;
in the step 2, a preset frequency band is a 67.5kHz-69.5kHz band;
in step 3, the preset value is 68.5 kHz.
4. The method as claimed in claim 1, wherein the step 4 of sending the warning message includes the following steps: and performing alarm grade division on the signals and executing corresponding alarm operation.
5. A wireless-spectrum interference monitoring system for a low-frequency time-code monitoring system, for implementing the method of claim 1; the system comprises:
the antenna module is used for carrying out omnidirectional receiving on electromagnetic interference signals in the surrounding environment of the low-frequency time code monitoring system aiming at a preset monitoring frequency band;
the frequency spectrum acquisition module is used for amplifying the signals received by the antenna module, sampling the signals, and filtering the signals to obtain the power and frequency points of each signal in a preset monitoring frequency band;
the data analysis module is used for inputting the signal power acquired by the frequency spectrum acquisition module to realize power value statistics of the interference signal and study and judgment of the interference signal;
a support module to provide power supply and rack support for the wireless-spectrum interference monitoring system.
6. The wireless-spectrum interference monitoring system for a low-frequency time-code monitoring system according to claim 5, further comprising:
the network communication module is used for transmitting the interference information from the external field monitoring station to the monitoring master station;
and the database module is used for storing the wireless spectrum interference monitoring data and corresponding alarm information.
7. The wireless-spectrum interference monitoring system for the low-frequency time-code monitoring system according to claim 5, wherein the antenna module employs an omni-directional active antenna; the effective operating frequency range of the antenna is 9kHz to 100 kHz.
8. The wireless spectrum interference monitoring system for the low-frequency time code monitoring system according to claim 7, wherein the specific steps of the spectrum acquisition module, after amplifying the signal received by the antenna module, sampling the signal, and after filtering, obtaining the power and frequency point of each signal in the preset monitoring frequency band, include:
the method comprises the steps of receiving and measuring signal parameters in a range from 9kHz to 100kHz through interference signal acquisition equipment, detecting signals after filtering and amplifying, analyzing obtained envelope signals, and obtaining power and frequency points of each signal in a preset monitoring frequency band.
9. The system according to claim 5, wherein the step of evaluating the interference signal in the data analysis module comprises:
and aiming at a certain frequency point, comparing the current signal power serving as a reference value with a next monitoring result, counting the signal power variation trend of a preset time period, calculating the average value and the standard deviation of the signal power value, and judging as an interference signal if the signal shows continuous high-power output in the preset time period.
10. The wireless spectrum interference monitoring system for the low frequency time code monitoring system according to claim 5, wherein the specific steps of the power value statistics of the interference signal in the data analysis module include: firstly, judging the validity of a receiving receipt, and then extracting valid data; performing gross error rejection and smooth filtering on the effective data, and selecting a frequency point with a power value of more than or equal to 68.5 kHz; recording the current measurement result of the selected frequency point, comprising: interference signal frequency point, interference signal power, interference occurrence time and duration.
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| CN113138201B (en) * | 2021-03-24 | 2022-05-20 | 北京大学 | Metamaterial Internet of things system and method for wireless passive environment state detection |
| CN113242103B (en) * | 2021-05-10 | 2022-08-23 | 成都华日通讯技术股份有限公司 | Automatic monitoring method for interference signal source |
| CN113489558B (en) * | 2021-07-01 | 2023-04-28 | 中国科学院国家授时中心 | Interference detection analysis method, system, equipment and medium for low-frequency time code time service signals |
| CN113655275B (en) * | 2021-08-27 | 2023-06-02 | 中国科学院云南天文台 | Space radio environment measurement and control device and system |
| CN113992287B (en) * | 2021-10-26 | 2024-05-24 | 封开低频时码授时台 | Low-frequency time code time service signal carrier frequency selection method and system |
| CN114153229A (en) * | 2021-11-30 | 2022-03-08 | 广东电网有限责任公司 | Transmission line inspection system for unmanned aerial vehicle |
| CN114039678B (en) * | 2021-12-07 | 2024-07-30 | 中国人民解放军61096部队 | Interference detection method and device |
| CN115102647B (en) * | 2022-06-30 | 2023-09-29 | 北京服装学院 | Detection of 5G communication interference signals based on data mining and proofreading technology |
| CN118377393B (en) * | 2024-06-25 | 2024-09-24 | 上海海栎创科技股份有限公司 | Touch interference suppression method, system, panel, equipment and storage medium |
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