A method and system for monitoring radio wave quality

Abstract

The present invention relates to the field of radio frequency wave monitoring technology, and discloses a radio wave quality monitoring method and system. A radio wave quality monitoring method comprises the following steps: S1, respectively collecting two groups of radio wave information data in the area to be monitored based on two radio detectors; S2, recording the activation status of known communication equipment in the area; S3, filtering the electromagnetic waves generated by the activated known communication equipment at the receiving end of one of the radio detectors based on a filter; S4, conducting a comprehensive analysis on the two groups of collected radio wave information data, and judging the environmental information security status of the area based on the results of the comprehensive analysis. The present invention can eliminate the interference of radio frequency waves generated by safe and known communication equipment in the environment on the above-mentioned security monitoring process, and can detect the existence of unknown communication equipment more quickly and intuitively.

Description

Technical Field

[0001] The present invention relates to the field of radio frequency wave monitoring, and in particular to a radio wave quality monitoring method and system. Background Art

[0002] Electromagnetic waves are oscillating particle waves derived from electric and magnetic fields that oscillate in phase and are perpendicular to each other in space. They are electromagnetic fields that propagate in the form of waves and have wave-particle duality. Their particle form is called photons. Radio waves are included in electromagnetic waves. They specifically refer to electromagnetic waves in the radio frequency band that propagate in free space (including air and vacuum). The shorter the wavelength of a radio wave and the higher the frequency, the more information can be transmitted in the same time.

[0003] Since radio waves are high-frequency electromagnetic waves that are difficult to detect with the naked eye, their properties need to be measured by special radio detectors. The main purpose of monitoring the quality of radio waves is, on the one hand, to determine whether the wireless signal is stable, so as to facilitate timely maintenance of the signal transmitter. On the other hand, monitoring of wireless signals can also prevent information leakage.

[0004] For example, eavesdropping is a common factor that leads to information leakage. Therefore, in some high-end places and private meetings, radio detectors are used to detect whether there are listening devices in the room. With the popularity of mobile phones, there are also many eavesdropping devices. Some high-end places directly prohibit the entry of electronic devices. Secret filming and eavesdropping devices have penetrated into every corner of life. If they are not discovered in time, the privacy and secrets of life will be exposed, and important meeting contents may also be exposed. At this time, the anti-device radio detector can play a good defensive role. However, when the radio detector in the prior art searches for unknown communication devices, it is inevitable that it will be interfered by the radio frequency signals emitted by known security devices. Therefore, when someone in the environment uses unknown communication devices such as monitoring and surveillance in violation of regulations, the radio detector can usually only make a comprehensive judgment on all wireless signals in the environment, and it is difficult to timely and intuitively reflect the radio frequency information security status in the environment. Summary of the invention

[0005] The purpose of the present invention is to provide a radio wave quality monitoring method and system to solve the following technical problems:

[0006] How to timely judge the security status of radio frequency information in the environment by monitoring radio waves.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A method for monitoring radio wave quality comprises the following steps:

[0009] S1, collecting two sets of radio wave information data in the area to be monitored based on two radio detectors;

[0010] S2. Record the activation status of known communication equipment in the area;

[0011] S3, filtering the electromagnetic waves generated by the known communication equipment that has been turned on at the receiving end of one of the radio detectors based on a filter;

[0012] S4. Conduct a comprehensive analysis on the two sets of radio wave information data collected, and determine the environmental information security status of the area based on the results of the comprehensive analysis.

[0013] S5. Formulate early warning strategies and issue early warnings based on the results of the determination of the environmental information security status of the area.

[0014] As a further technical solution, the radio wave information data includes frequency data of the radio waves in the regional environment and power data of the radio waves.

[0015] As a further technical solution, the process of comprehensively analyzing the two sets of radio wave information data collected includes:

[0016] By formula Calculate and obtain the first wave frequency safety parameter P1;

[0017] Wherein, t1 and t2 are the left and right endpoints of the preset time interval [t1, t2] respectively; f β (t) is the ambient radio frequency value collected by the radio detector after being filtered by the filter; g is the standard conversion function, n is the number of known communication devices that have been turned on; Δr is the preset reference coefficient;

[0018] The first wave frequency installation parameter P1 and the preset threshold P th1 Compare and judge:

[0019] If P1>P th1 , then it is determined that there is a risk of information leakage in this area.

[0020] As a further technical solution, the process of comprehensively analyzing the two sets of radio wave information data collected also includes:

[0021] If P1≤P th1 , then the radio wave decay is analyzed:

[0022] By formula Calculate and obtain the second wave frequency safety parameter P2;

[0023] Among them, f α(t) is the frequency value of the ambient radio wave collected by another radio detector without being filtered; w is the standard attenuation value conversion function;

[0024] The second wave frequency safety parameter P2 and the preset threshold P th2 Compare and judge:

[0025] If P2<P th2 , then it is determined that there is a risk of information leakage in this area;

[0026] If P2 ≥ P th2 , then the regional environmental information is determined to be safe.

[0027] As a further technical solution, the process of comprehensively analyzing the two sets of radio wave information data collected also includes:

[0028] If P1>P th1 And P2<P th2 ,but:

[0029] By formula Calculate the risk value Risk of information leakage;

[0030] Among them, ε1, ε2 are preset weight coefficients;

[0031] Compare the risk value Risk with the preset threshold R:

[0032] If Risk>R, the location of the information leakage source is determined.

[0033] As a further technical solution, the process of determining the location of the information leakage source includes:

[0034] Turn off known communication equipment, move the unfiltered radio detector according to a preset trajectory, and ensure that the distance between the moved radio detector and another fixed radio detector remains unchanged during the movement;

[0035] By formula The time interval corresponding to the entire movement process of the radio detector [t d , t b ], the corresponding time point t is calculated by combining the equation ΔP′(t)=0 and the inequality ΔP″(t)<0 i , i=1,2,3……

[0036] Among them, P r1 (t) is the radio signal power value detected by the moving radio detector; P r2 (t) is the radio signal power value detected by another radio detector; Δγ is a preset reference coefficient, and Δγ>0;

[0037] Record MAX{ΔP(t i )} The position of the radio detector at the corresponding moment, it is determined that the information leakage source is located on the straight line connecting the two radio detectors at this moment, and is located in the direction where the fixed radio detector points to the moving radio detector.

[0038] As a further technical solution, the method further includes determining the filtering effect of the filter on the radio waves before step S4, and the specific process is as follows:

[0039] Take the time interval [t x , t y ];

[0040] By formula Calculate the attenuation effect parameter value δ effect ;

[0041] Among them, μ1 and μ2 are preset reference coefficients; t0 is the interval [t x , t y ] MAX{f β (t)} corresponding to the moment; Δt is the preset time difference;

[0042] If the attenuation effect parameter value δ effect Less than the preset threshold δ min , it is determined that the filtering effect of the filter is poor and the filter is replaced.

[0043] A radio wave quality monitoring system, the system comprising:

[0044] Radio detector, used to collect radio wave information data;

[0045] An analysis module, used for comprehensive analysis of radio wave information data;

[0046] The early warning module is used to execute early warning strategies.

[0047] Beneficial effects of the present invention:

[0048] (1) In the present invention, two instruments for collecting radio wave information data are provided. By filtering the receiving port of one of the radio detectors, the interference of radio frequency waves generated by safe and known communication equipment in the environment on the above-mentioned security monitoring process can be eliminated. When someone in the environment uses unknown communication equipment that threatens information security such as monitoring, the existence of unknown communication equipment can be detected more quickly and intuitively. In addition, by comparing the two radio detectors, the filtering effect of the filter can also be determined, and a filter replacement strategy can be formulated based on the effect.

[0049] (2) The present invention can determine that the information leakage source is located on the straight line where the two radio detectors are connected at this moment, and is located in the direction where the fixed radio detector points to the moving radio detector, by finding the connecting line of the two receiving end positions corresponding to the maximum difference in the two receiving powers, and then according to the characteristics of electromagnetic wave propagation in a straight line and power attenuation along the path. In addition, another connecting line can be obtained by moving the positions of the two receiving ends as a whole, so it can be determined that the information leakage source is located at the intersection of the two connecting lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The present invention will be further described below in conjunction with the accompanying drawings:

[0051] Figure 1 is a flow chart of the steps of the method for monitoring the quality of radio waves of the present invention;

[0052] Figure 2 The figure is a schematic block diagram of a radio wave quality monitoring system according to the present invention. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0054] A method for monitoring radio wave quality comprises the following steps:

[0055] S1. Two sets of radio wave information data are collected in the monitored area based on two radio detectors:

[0056] S2. Record the activation status of known communication equipment in the area;

[0057] S3, filtering the electromagnetic waves generated by the known communication equipment that has been turned on at the receiving end of one of the radio detectors based on a filter;

[0058] S4. Conduct a comprehensive analysis on the two sets of radio wave information data collected, and determine the environmental information security status of the area based on the results of the comprehensive analysis.

[0059] S5. Formulate early warning strategies and issue early warnings based on the results of the determination of the environmental information security status of the area.

[0060] Through the above technical solution, this embodiment provides a method for detecting information security in an environment based on a radio detector. Specifically, by filtering the receiving port of one of the radio detectors, the interference of radio frequency waves generated by safe and known communication equipment in the environment on the above security monitoring process can be eliminated. When someone in the environment violates the rules and uses unknown communication equipment such as monitoring and surveillance, the existence of the unknown communication equipment can be detected more quickly and intuitively through the above filtered radio detector. In addition, by comparing the two radio detectors, the filtering effect of the filter can also be judged, and a filter replacement strategy can be formulated based on the effect.

[0061] The radio wave information data includes the frequency data of the radio waves in the area environment and the power data of the radio waves

[0062] Through the above technical solution, this embodiment provides the specific content of the collected radio wave information data, wherein the radio waves emitted by different devices have different frequencies, and the function of the radio waves will be attenuated along their straight-line propagation path, which can be specifically expressed by the formula: Among them, k is the coefficient value of the impact factor under different environments; P r is the received power, P s is the transmission power; s is the distance between the receiving end and the transmitting end.

[0063] The process of comprehensive analysis of the two sets of radio wave information data collected includes:

[0064] By formula Calculate and obtain the first wave frequency safety parameter P1;

[0065] Wherein, t1 and t2 are the left and right endpoints of the preset time interval [t1, t2] respectively; f β (t) is the ambient radio frequency value collected by the radio detector after being filtered by the filter; g is the standard conversion function, n is the number of known communication devices that have been turned on; Δr is the preset reference coefficient;

[0066] The first wave frequency installation parameter P1 and the preset threshold P th1 Compare and judge:

[0067] If P1>P th1 , then it is determined that there is a risk of information leakage in this area.

[0068] Through the above technical solution, this embodiment provides a process for comprehensively analyzing the radio wave information data. Specifically, firstly, the formula The first wave frequency safety parameter P1 is calculated and then the first wave frequency installation parameter P1 is compared with the preset threshold value P th1 Compare and judge, when P1>P th1, it means that under the condition of reducing the interference of known communication equipment, the radio wave frequency in the environment has been detected to have changed significantly in the interval [t1, t2], and this change is likely caused by the increase of unknown communication equipment. Therefore, it can be determined that there is a risk of information leakage in this area. It should be noted that g is a standard conversion function, which is related to the type of additional equipment and can be obtained based on experimental data without signal interference. Δr is a preset reference coefficient, which can also be obtained by fitting experimental data, which will not be described in detail here. The preset interval [t1, t2] is taken from when the frequency curve tends to be stable before and after the known communication equipment is turned on or off.

[0069] The process of comprehensive analysis of the two sets of radio wave information data collected also includes:

[0070] If P1≤P th1 , then the radio wave decay is analyzed:

[0071] By formula Calculate and obtain the second wave frequency safety parameter P2;

[0072] Among them, f α (t) is the frequency value of the ambient radio wave collected by another radio detector without being filtered; w is the standard attenuation value conversion function;

[0073] The second wave frequency safety parameter P2 and the preset threshold P th2 Compare and judge:

[0074] If P2<P th2 , then it is determined that there is a risk of information leakage in this area;

[0075] If P2 ≥ P th2 , then the regional environmental information is determined to be safe.

[0076] Through the above technical solution, this embodiment provides another process for comprehensive analysis of radio wave information data. Specifically, if P1≤P th1 , which does not mean that there is no information leakage risk in the environment. It may also be that the frequency band of the RF signal of the unknown communication device is close to the frequency band of the known communication device, and the signal frequency is filtered out by the filter, resulting in P1≤P th1 , so it is necessary to analyze the radio wave attenuation: First, through the formula Calculate the second wave frequency safety parameter P2, and then compare the second wave frequency safety parameter P2 with the preset threshold value P th2 Compare and judge: When P2<P th2, indicating that the attenuation value of the radio wave frequency in the environment has changed significantly before and after being filtered by the filter, which may be caused by the radio frequency waves of the location communication equipment being filtered. Therefore, it is determined that there is a risk of information leakage in this area; if P2≥P th2 , then the regional environmental information is determined to be safe. It should be noted that w is the standard attenuation value conversion function, which is related to the type of known communication equipment and can be obtained by fitting experimental data.

[0077] The process of comprehensive analysis of the two sets of radio wave information data collected also includes:

[0078] If P1>P th1 And P2<P th2 ,but:

[0079] By formula Calculate the risk value Risk of information leakage;

[0080] Among them, ε1, ε2 are preset weight coefficients;

[0081] Compare the risk value Risk with the preset threshold R:

[0082] If Risk>R, the location of the information leakage source is determined.

[0083] Through the above technical solution, this embodiment provides a process for quantitatively analyzing situations where there is a risk of information leakage. Specifically, through the formula The weighted calculation is performed to obtain the risk value Risk of information leakage, and then the risk value Risk is compared with the preset threshold R: when Risk>R, it means that there is a high possibility of information leakage source in the environment. Therefore, it is necessary to determine the location of the information leakage source and notify the relevant personnel with early warning to stop the information leakage behavior in time.

[0084] The process of determining the location of the information leak source includes:

[0085] Turn off known communication equipment, move the unfiltered radio detector according to a preset trajectory, and ensure that the distance between the moved radio detector and another fixed radio detector remains unchanged during the movement;

[0086] By formula The time interval corresponding to the entire movement process of the radio detector [t a , t b ], the corresponding time point t is calculated by combining the equation ΔP′(t)=0 and the inequality ΔP″(t)<0 i , i=1,2,3……

[0087] Among them, Pr1 (t) is the radio signal power value detected by the moving radio detector; P r2 (t) is the radio signal power value detected by another radio detector; Δγ is a preset reference coefficient, and Δγ>0;

[0088] Record MAX{ΔP(t i )} The position of the radio detector at the corresponding moment, it is determined that the information leakage source is located on the straight line connecting the two radio detectors at this moment, and is located in the direction where the fixed radio detector points to the moving radio detector.

[0089] Through the above technical solution, this embodiment provides a process for determining the location of the information leakage source. Specifically, firstly, the known communication equipment is turned off, and the radio detector that has not been filtered by the filter is moved according to the preset trajectory, and it is ensured that during the movement, the distance between the moved radio detector and another fixed radio detector remains unchanged, and the distance should not be too large to ensure that the information leakage will not be set between the two radio detectors. Then, through the formula The time interval corresponding to the entire movement process of the radio detector [t a , t b ], the corresponding time point t is calculated by combining the equation ΔP′(t)=0 and the inequality ΔP″(t)<0 i , i = 1, 2, 3... Through the above scheme, the two positions with the largest difference in received power are found. Due to the characteristics of electromagnetic waves propagating in a straight line and power attenuation along the path, it can be known that the information leakage source is located on the straight line where the two radio detectors are located at this moment, and is located in the direction where the fixed radio detector points to the moving radio detector. In addition, by moving the two radio detectors as a whole and repeating the above operation, another line can be obtained, and the position of the information leakage source can be represented by the intersection of the two lines before and after. Therefore, the above technical solution can more accurately obtain the specific location of the information leakage source.

[0090] The method further comprises determining the filtering effect of the filter on the radio waves before step S4, and the specific process is as follows:

[0091] Take the time interval [t x , t y ];

[0092] By formula Calculate the attenuation effect parameter value δ effect ;

[0093] Among them, μ1 and μ2 are preset reference coefficients; t0 is the interval [t x , t y] MAX{f β (t)} corresponding to the moment; Δt is the preset time difference;

[0094] If the attenuation effect parameter value δ effect Less than the preset threshold δ min , it is determined that the filtering effect of the filter is poor and the filter is replaced.

[0095] Through the above technical solution, this embodiment provides a method for judging the filtering effect of the filter on the radio waves. Because the filtering effect of the filter plays a dominant role in the whole process of monitoring the quality of the radio waves, it is necessary to troubleshoot the filter. The main fault of the filter is reflected in that each time a communication device is added, the filter cannot filter out the radio waves emitted by the known communication device in time. Therefore, the specific detection method is developed around this point. First, the time interval [t x , t y ]; through the formula Calculate the attenuation effect parameter value δ effect ; Among them, μ1 and μ2 are preset reference coefficients that can be obtained according to experimental fitting; t0 is the interval [t x , t y ] MAX{f β (t)}, that is, when the communication equipment is added, the frequency value suddenly reaches the highest point due to the slow filter reaction; Δt is the preset time difference, which can be obtained by kneading the experimental data of different equipment. effect Less than the preset threshold δ min , it means that the filtering effect of the filter is poor and the filter needs to be replaced.

[0096] A radio wave quality monitoring system, the system comprising:

[0097] Radio detector, used to collect radio wave information data;

[0098] An analysis module, used for comprehensive analysis of radio wave information data;

[0099] The early warning module is used to execute early warning strategies.

[0100] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for monitoring radio wave quality, characterized in that: The following steps are involved: S1, collecting two sets of radio wave information data in the monitored area based on two radio detectors; S2. Record the activation status of known communication devices in the area; S3, filtering the electromagnetic waves generated by the known communication equipment that has been turned on at the receiving end of one of the radio detectors based on a filter; S4. Comprehensively analyze the two sets of radio wave information data collected, and determine the environmental information security status of the area based on the results of the comprehensive analysis; S5. Formulate early warning strategies and issue early warnings based on the results of the determination of the environmental information security status of the region; The process of comprehensive analysis of the two sets of radio wave information data collected includes: By formula Calculate and obtain the first wave frequency safety parameter P1; Wherein, t1 and t2 are the left and right endpoints of the preset time interval [t1, t2] respectively; f β (t) is the ambient radio frequency value collected by the radio detector after being filtered by the filter; g is the standard conversion function, n is the number of known communication devices that have been turned on; Δr is the preset reference coefficient; The first wave frequency safety parameter P1 and the preset threshold P th1 Compare and judge: If P1>P th1 , then it is determined that there is a risk of information leakage in this area.

2. A radio wave quality monitoring method according to claim 1, characterized in that: The radio wave information data includes frequency data of radio waves in the regional environment and power data of radio waves.

3. A radio wave quality monitoring method according to claim 1, characterized in that: The process of comprehensive analysis of the two sets of radio wave information data collected also includes: If P1≤P th1 , then the radio wave decay is analyzed: By formula Calculate and obtain the second wave frequency safety parameter P2; Among them, f α (t) is the frequency value of the ambient radio wave collected by another radio detector without being filtered; w is the standard attenuation value conversion function; The second wave frequency safety parameter P2 and the preset threshold P th2 Compare and judge: If P2 <P th2 , then it is determined that there is a risk of information leakage in this area; If P2 ≥ P th2 , then the regional environmental information is determined to be safe.

4. A radio wave quality monitoring method according to claim 3, characterized in that: The process of comprehensive analysis of the two sets of radio wave information data collected also includes: If P1>P th1 And P2 <P th2 ,but: By formula Calculate the risk value Risk of information leakage; Among them, ε1, ε2 are preset weight coefficients; Compare the risk value Risk with the preset threshold R: If Risk>R, determine the location of the information leakage source.

5. A radio wave quality monitoring method according to claim 4, characterized in that: The process of determining the location of the information leak source includes: Turn off known communication equipment, move the unfiltered radio detector according to a preset trajectory, and ensure that the distance between the moved radio detector and another fixed radio detector remains unchanged during the movement; By formula The time interval corresponding to the entire movement process of the radio detector [t a ,t b ], the corresponding time point t is calculated by combining the equation ΔP'(t)=0 and the inequality ΔP"(t)<0 i , i=1,2,3…… Among them, P r1 (t) is the radio signal power value detected by the moving radio detector; P r2 (t) is the radio signal power value detected by another radio detector; Δγ is a preset reference coefficient, and Δγ>0; Record MAX{ΔP(t i )} The position of the radio detector at the corresponding moment, it is determined that the information leakage source is located on the straight line connecting the two radio detectors at this moment, and is located in the direction where the fixed radio detector points to the moving radio detector.

6. A radio wave quality monitoring method according to claim 3, characterized in that: The method further comprises determining the filtering effect of the filter on the radio waves before step S4, and the specific process is as follows: Take the time interval [t x ,t y ]; By formula Calculate the attenuation effect parameter value δ effect ; Among them, μ1 and μ2 are preset reference coefficients; t0 is the interval [t x ,t y ] MAX{f β (t)} corresponding to the moment; Δt is the preset time difference; If the attenuation effect parameter value δ effect Less than the preset threshold δ min , it is determined that the filtering effect of the filter is poor and the filter is replaced.

7. A radio wave quality monitoring system, characterized in that: The system is used to perform a radio wave quality monitoring method according to any one of claims 1 to 6, and the system comprises: Radio detector, used to collect radio wave information data; An analysis module, used for comprehensive analysis of radio wave information data; The early warning module is used to execute early warning strategies.

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