CN112183339B - Electromagnetic environment assessment method, device and server - Google Patents
Electromagnetic environment assessment method, device and server Download PDFInfo
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Abstract
The electromagnetic environment assessment method, the electromagnetic environment assessment device and the electromagnetic environment assessment server are applied to the technical field of railway vehicles, after target radiation signals of signal sources in target assessment points are scanned, the electric field intensity values and the magnetic field intensity values of the signal sources and the types of the signal sources are determined according to analysis results of the target radiation signals, the electric field intensity threshold values and the magnetic field intensity threshold values of the signal sources are further obtained, and finally assessment results of the signal sources are determined according to the magnitude relation between the electric field intensity values and the electric field intensity threshold values and the magnitude relation between the magnetic field intensity values and the magnetic field intensity threshold values and the types of the signal sources. Compared with the prior art, the method combines the electric field intensity value, the magnetic field intensity value and the type of the signal source to finally obtain the evaluation result, and the comprehensive multi-aspect conditions evaluate the electromagnetic environment of the rail train operation, so that the obtained evaluation result is more accurate and reliable, and an effective reference basis can be provided for the design and construction of the railway line.
Description
Technical Field
The invention belongs to the technical field of railway vehicles, and particularly relates to an electromagnetic environment assessment method, an electromagnetic environment assessment device and a server.
Background
There are a wide variety of electromagnetic interference sources in the operating environment of urban rail vehicles, such as radar systems, television and radio transmission systems, microwave medical equipment, various electrical processing equipment, communication transmitting stations, large power plants, power transmission and transformation equipment, high and ultra high voltage transmission lines, and most household appliances, etc., which are capable of producing electromagnetic radiation of various forms, different frequencies, and different intensities.
When urban rail vehicles travel to a road section with an electromagnetic interference source, part of the functions of the vehicles may be failed due to the influence of electromagnetic environment, and passenger safety may even be affected seriously. Therefore, the electromagnetic environment investigation and evaluation are carried out on the track line at the beginning of track line construction, so that an electromagnetic interference source existing along the track line is avoided as much as possible, and the method is one of important works of track line construction.
However, the existing method for evaluating the electromagnetic environment of the railway line simply collects electric field data and magnetic field data of electromagnetic interference sources along the railway line, and then feeds the obtained data back to an operator for reference, and the prior art lacks further analysis on the electric field data and the magnetic field data, so that effective reference basis is difficult to be provided for design and construction of the railway line.
Disclosure of Invention
In view of the above, the present invention aims to provide an electromagnetic environment evaluation method, an electromagnetic environment evaluation device and a server, which analyze the electric field intensity value and the magnetic field intensity value of a signal source of a target evaluation point, and determine the evaluation result of the signal source by combining the type of the signal source, so that an effective reference basis can be provided for the design and construction of a railway line, and the specific scheme is as follows:
in a first aspect, the present invention provides an electromagnetic environment assessment method, including:
scanning the radiation signal of the target evaluation point in a preset frequency range to obtain a target radiation signal of at least one signal source;
analyzing the target radiation signal, and determining an electric field intensity value and a magnetic field intensity value of the signal source and the type of the signal source according to an analysis result;
acquiring an electric field intensity threshold value and a magnetic field intensity threshold value of the signal source;
and determining an evaluation result of the signal source according to the magnitude relation between the electric field intensity value and the electric field intensity threshold value, the magnitude relation between the magnetic field intensity value and the magnetic field intensity threshold value and the type of the signal source, wherein the evaluation result represents the influence degree of the radiation signal of the signal source on the normal running of the railway vehicle.
Optionally, the evaluation result is expressed in an evaluation level, and the determining the evaluation result of the signal source according to the magnitude relation between the electric field strength value and the electric field strength threshold value, the magnitude relation between the magnetic field strength value and the magnetic field strength threshold value, and the type of the signal source includes:
if at least one of the electric field strength value not smaller than the electric field strength threshold value and the magnetic field strength value not smaller than the magnetic field strength threshold value is met, and the signal source is an indefinite frequency signal source, determining that the signal source is a class I signal source;
if at least one of the electric field strength value not smaller than the electric field strength threshold value and the magnetic field strength value not smaller than the magnetic field strength threshold value is met, the signal source is a fixed frequency signal source, and the signal source is determined to be a class II signal source;
and if the electric field strength value is smaller than the electric field strength threshold value or the magnetic field strength value is smaller than the magnetic field strength threshold value, determining that the signal source is a class III signal source.
Optionally, the preset frequency range includes a plurality of frequency intervals, and the acquiring the electric field intensity threshold and the magnetic field intensity threshold of the signal source includes:
respectively determining a frequency interval to which the electric field intensity value belongs and a frequency interval to which the magnetic field intensity value belongs;
determining an electric field intensity threshold value of the electric field intensity value of the signal source according to a frequency interval to which the electric field intensity value belongs;
and determining a magnetic field intensity threshold value of the magnetic field intensity value of the signal source according to the frequency interval to which the magnetic field intensity value belongs.
Optionally, the determining, according to the frequency interval to which the electric field intensity value belongs, an electric field intensity threshold of the electric field intensity value of the signal source includes:
inquiring a first preset mapping relation, and taking an electric field intensity threshold value corresponding to a frequency interval to which the electric field intensity value belongs as the electric field intensity threshold value of the electric field intensity value of the signal source;
the first preset mapping relation records a corresponding relation between a frequency interval and an electric field intensity threshold.
Optionally, the determining the magnetic field intensity threshold of the magnetic field intensity value of the signal source according to the frequency interval to which the magnetic field intensity value belongs includes:
inquiring a second preset mapping relation, and taking a magnetic field intensity threshold value corresponding to a frequency interval to which the magnetic field intensity value belongs as a magnetic field intensity threshold value of the magnetic field intensity value of the signal source;
the second preset mapping relation records the corresponding relation between the frequency interval and the magnetic field intensity threshold value.
Optionally, before the scanning the radiation signal of the target evaluation point in the preset frequency range to obtain the target radiation signal of at least one signal source, the method further includes:
acquiring an evaluation point map, wherein the evaluation point map comprises all evaluation points along a railway line;
and taking any evaluation point in the evaluation point map as a target evaluation point.
Optionally, the electric field strength value includes an alternating current electric field strength value and a direct current electric field strength value.
In a second aspect, the present invention provides an electromagnetic environment assessment apparatus comprising:
the scanning unit is used for scanning the radiation signal of the target evaluation point in a preset frequency range to obtain a target radiation signal of at least one signal source;
the analysis unit is used for analyzing the target radiation signal, and determining an electric field intensity value and a magnetic field intensity value of the signal source and the type of the signal source according to an analysis result;
the first acquisition unit is used for acquiring an electric field intensity threshold value and a magnetic field intensity threshold value of the signal source;
and the evaluation unit is used for determining an evaluation result of the signal source according to the magnitude relation between the electric field intensity value and the electric field intensity threshold value, the magnitude relation between the magnetic field intensity value and the magnetic field intensity threshold value and the type of the signal source, wherein the evaluation result represents the influence degree of the radiation signal of the signal source on the normal running of the railway vehicle.
Optionally, the evaluation result is expressed in an evaluation grade, and the evaluation unit is configured to determine, according to a magnitude relation between the electric field strength value and the electric field strength threshold, a magnitude relation between the magnetic field strength value and the magnetic field strength threshold, and the type of the signal source, the evaluation result of the signal source specifically includes:
if at least one of the electric field strength value not smaller than the electric field strength threshold value and the magnetic field strength value not smaller than the magnetic field strength threshold value is met, and the signal source is an indefinite frequency signal source, determining that the signal source is a class I signal source;
if at least one of the electric field strength value not smaller than the electric field strength threshold value and the magnetic field strength value not smaller than the magnetic field strength threshold value is met, the signal source is a fixed frequency signal source, and the signal source is determined to be a class II signal source;
and if the electric field strength value is smaller than the electric field strength threshold value or the magnetic field strength value is smaller than the magnetic field strength threshold value, determining that the signal source is a class III signal source.
In a third aspect, the present invention provides a server comprising: a memory and a processor; the memory stores a program adapted to be executed by the processor to implement the electromagnetic environment assessment method according to any one of the first aspect of the present invention.
Based on the technical scheme, the electromagnetic environment evaluation method provided by the invention further obtains the electric field intensity threshold value and the magnetic field intensity threshold value of the signal source according to the analysis result of the target radiation signal after scanning the target radiation signal of the signal source in the target evaluation point, and finally determines the evaluation result of the signal source according to the magnitude relation between the electric field intensity value and the electric field intensity threshold value, the magnitude relation between the magnetic field intensity value and the magnetic field intensity threshold value and the type of the signal source.
Under the condition that the electric field intensity value and the magnetic field intensity value of the signal source of the target evaluation point are obtained, the electric field intensity value is judged based on the electric field intensity threshold value, the influence of the electric field intensity on the train operation is evaluated, the magnetic field intensity is judged based on the magnetic field intensity threshold value, the influence of the magnetic field intensity on the train operation is evaluated, the type of the signal source is further introduced, and the final evaluation result is obtained by combining the type of the signal source.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of an electromagnetic environment assessment method provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of an assessment point map provided by an embodiment of the present invention;
FIG. 3 is a block diagram of an electromagnetic environment assessment apparatus according to an embodiment of the present invention;
FIG. 4 is a block diagram of another electromagnetic environment assessment apparatus according to an embodiment of the present invention;
fig. 5 is a block diagram of a server according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a flowchart of an electromagnetic environment assessment method provided by an embodiment of the present invention, where the method may be applied to an electronic device, where the electronic device may be an electronic device with data processing capability, such as a notebook computer, a smart phone, a PC (personal computer), etc., and obviously, the electronic device may also be implemented by a server on a network side in some cases; referring to fig. 1, the electromagnetic environment assessment method provided by the embodiment of the present invention may include:
s100, scanning the radiation signal of the target evaluation point in a preset frequency range to obtain a target radiation signal of at least one signal source.
The target evaluation point in the embodiment of the present invention refers to an evaluation point in the track line where electromagnetic environment evaluation needs to be performed, and it is conceivable that the track line is very long, and therefore, a plurality of evaluation points are often included in the track line of one railway line.
Alternatively, the location of each evaluation point along the railway line is basically clear in the railway line selection process, for example, a typical building along the railway line, such as a hospital, a school, a radar station, and the like, so that after the railway line is basically determined, the evaluation point existing along the railway line can be clearly known. Based on this, an evaluation point map including all the evaluation points along the railway line may be constructed in advance, and any one of the evaluation points in the evaluation point map may be taken as a target evaluation point after the evaluation point map is obtained. Optionally, referring to fig. 2, fig. 2 is a schematic diagram of an evaluation point map provided by an embodiment of the present invention, where the evaluation point map is based on a railway line, and marks each evaluation point along the railway line, that is, a hospital, a national defense unit, a communication base station, and the like.
According to industry related regulations, when the electromagnetic environment of rail train operation is evaluated, all radiation signals with the frequency of 0Hz-6GHz are included, so that the preset frequency range in the embodiment of the invention can be selected to be the frequency range of 0Hz-6GHz, of course, smaller or larger frequency ranges can be selected according to actual evaluation requirements, and the specific selection of the preset frequency range is not limited. It should be noted that, for a radiation signal with a frequency of 0Hz, a dc signal corresponds substantially to the dc signal, and the effect of the dc electric field and the dc magnetic field on the rail train operation is the corresponding to be evaluated.
Based on the above, when performing electromagnetic evaluation on the target evaluation point, it is first required to scan the radiation signal of the target evaluation point in a preset frequency range to obtain the target radiation signal of at least one signal source. It is conceivable that for any one target evaluation point, at which at least one electrical device is often included, so that, correspondingly, in practice, a target radiation signal of at least one signal source is also obtained when the radiation signal of the target evaluation point is scanned. Since the analysis process is consistent for each signal source, in the following, the number of signal sources is not explicitly divided.
It should be further noted that, the scanning process of the radiation signal of the target evaluation point is not limited in the embodiment of the present invention, and may be implemented with reference to the prior art.
S110, analyzing the target radiation signal, and determining the electric field intensity value, the magnetic field intensity value and the type of the signal source according to the analysis result.
After the target radiation signal of the signal source is obtained, the target radiation signal needs to be analyzed, and the electric field intensity value, the magnetic field intensity value and the type of the signal source are determined according to the analysis result.
In the embodiment of the present invention, the types of signal sources generally include two types, namely, a non-fixed-frequency signal source and a fixed-frequency signal source. The fixed-frequency signal source mostly refers to broadcast signals in different frequency bands above cities, the signal curve characteristic is that single-point amplitude is strong, continuous sheet-shaped chaotic curve fluctuation cannot occur, and broadcasting station sound can be heard after demodulation. The frequency band can be judged through frequency spectrum management and record. Correspondingly, for the non-fixed frequency signal source, the identification can be realized through the frequency spectrum characteristics of the radiation signal and the related recorded data.
The calculation and determination of the electric field intensity value and the magnetic field intensity value of the signal source can be realized according to the prior art, and the specific determination process of the electric field intensity value and the magnetic field intensity value of the signal source is not limited.
Optionally, as can be seen from the foregoing, the electric field strength values described in the embodiments of the present invention include a dc electric field strength value and an ac electric field strength value, and the magnetic field strength values include a dc magnetic field strength value and an ac magnetic field strength value.
S120, acquiring an electric field intensity threshold value and a magnetic field intensity threshold value of the signal source.
Optionally, in practical application, according to regulations of industry related regulations, in the evaluation of the electromagnetic environment of the rail train, the electric field intensity threshold value and the magnetic field intensity threshold value corresponding to the radiation signals with different frequencies are different.
Specifically, referring to table 1, table 1 shows the electric field intensity thresholds corresponding to different frequency bins.
TABLE 1
| Frequency range | Electric field strength E l (V/m) |
| 1Hz-8Hz | 8000 |
| 8Hz-25Hz | 8000 |
| 0.025KHz-1.2KHz | 200/f |
| 1.2KHz-2.9KHz | 200/f |
| 2.9KHz-57KHz | 70 |
| 57KHz-100KHz | 4000/f |
| 0.1MHz-3MHz | 40 |
| 3MHz-30MHz | 67/f 1/2 |
| 30MHz-3000MHz | 12 |
| 3000MHz-6000MHz | 0.22f 1/2 |
It should be noted that, the electric field intensity threshold of the dc electric field may be selected according to actual needs, for example, may be set to 80V/m.
Further, referring to table 2, table 2 shows magnetic field strength thresholds corresponding to different frequency bins.
TABLE 2
Based on the above, it can be seen that the frequency interval to which the target radiation signal belongs is different, and the corresponding threshold value is also different. Therefore, after the electric field intensity value and the magnetic field intensity value corresponding to the target radiation signal are obtained through the foregoing steps, it is necessary to determine the frequency interval to which the electric field intensity value belongs and the frequency interval to which the magnetic field intensity value belongs, respectively.
And then, determining an electric field intensity threshold corresponding to the electric field intensity value of the signal source according to the frequency interval to which the electric field intensity value of the target radiation signal belongs. As an optional implementation manner, a first preset mapping relationship may be preset, where the first preset mapping relationship records a corresponding relationship between a frequency interval and an electric field intensity threshold, and by querying the first preset mapping relationship, the electric field intensity threshold corresponding to the frequency interval to which the electric field intensity value obtained in the foregoing step belongs may be directly used as the electric field intensity threshold corresponding to the electric field intensity value of the signal source.
Correspondingly, for the process of determining the magnetic field intensity threshold corresponding to the magnetic field intensity value of the signal source according to the frequency interval to which the magnetic field intensity value of the target radiation signal belongs, a similar method can be adopted for realizing. Namely, providing a second preset mapping relation, recording the corresponding relation between the frequency interval and the magnetic field intensity threshold value in the second preset mapping relation, inquiring the second preset mapping relation after obtaining the magnetic field intensity value of the target radiation signal, and taking the magnetic field intensity threshold value corresponding to the frequency interval to which the magnetic field intensity value belongs as the magnetic field intensity threshold value corresponding to the magnetic field intensity value of the signal source.
It should be noted that, the specific implementation manner of the first preset mapping relationship and the second preset mapping relationship is not limited in particular, for example, the first preset mapping relationship and the second preset mapping relationship may be recorded and embodied in a manner shown in table 1 and table 2, and of course, other expression manners in the prior art may also be adopted.
It should be noted that, for the specific division of the frequency intervals and the thresholds corresponding to different frequency intervals, the thresholds may be selected according to the actual application requirements, and are not limited by the implementation manners given in table 1 and table 2.
S130, determining an evaluation result of the signal source according to the magnitude relation between the electric field intensity value and the electric field intensity threshold value, the magnitude relation between the magnetic field intensity value and the magnetic field intensity threshold value and the type of the signal source.
In an embodiment of the invention, the obtained evaluation result is used for representing the influence degree of the radiation signal of the signal source on the normal running of the railway vehicle. In order to facilitate the final conclusion of the evaluation result, the evaluation result is further expressed in a manner of adopting an evaluation grade, and in the embodiment of the invention, the evaluation grade of the signal source can be divided into three types, namely a grade I, a grade II and a grade III, wherein the influence of the grade I signal source on the rail train is the most serious, and the influence of the grade III signal source on the rail train is the least.
Based on the above, if at least one condition of the electric field strength value of the signal source being not less than the corresponding electric field strength threshold value and the magnetic field strength value being not less than the magnetic field strength threshold value is satisfied and the signal source is an indefinite frequency signal source, the signal source is determined to be a class I signal source.
If at least one of the conditions that the electric field intensity value of the signal source is not smaller than the electric field intensity threshold value and the magnetic field intensity value is not smaller than the magnetic field intensity threshold value is met, and the signal source is a fixed frequency signal source, the signal source is determined to be a class II signal source.
And if the electric field intensity value of the signal source is smaller than the electric field intensity threshold value, or the magnetic field intensity value of the signal source is smaller than the magnetic field intensity threshold value, determining that the signal source is a class III signal source.
In summary, under the condition that the electric field intensity value and the magnetic field intensity value of the signal source of the target evaluation point are obtained, the electric field intensity value is judged based on the electric field intensity threshold value, the influence of the electric field intensity on the train operation is evaluated, the magnetic field intensity is judged based on the magnetic field intensity threshold value, the influence of the magnetic field intensity on the train operation is evaluated, the type of the signal source is further introduced, and the final evaluation result is obtained by combining the type of the signal source.
Optionally, in order to facilitate the representation and use of the above evaluation criteria in practical applications, embodiments of the present invention further provide an electromagnetic environment evaluation model, specifically,
ΔE＝E m -E l
ΔH＝H m -H l
L 1 ＝F
L 2 ＝E|H
wherein deltaE is an electric field strength evaluation value, and the unit is V/m;
E m the electric field strength value is V/m;
E l the unit is V/m, which is the threshold value of the electric field intensity;
ΔH is an estimated value of magnetic field strength in A/m;
H m the unit is A/m, which is the magnetic field intensity value;
H l is a magnetic field intensity threshold, and the unit is A/m;
L 1 and L 2 Taking 0 or 1 as an environment evaluation factor, and taking no dimension;
f is a constant frequency radiation source evaluation factor, 0 or 1 is taken, and dimensionless is achieved;
e is an electric field evaluation factor, 0 or 1 is taken, and dimensionless is obtained;
h is a magnetic field evaluation factor, 0 or 1 is taken, and dimensionless is achieved.
The electromagnetic environment evaluation method provided by the present application will be described below with specific evaluation examples based on the above electromagnetic environment evaluation model.
Taking the 3 rd evaluation point in the evaluation point map shown in fig. 2, namely the national defense unit, as a target evaluation point, obtaining an electric field intensity value and a magnetic field intensity value of the target evaluation point in a preset frequency range, and then obtaining the electric field intensity value and the magnetic field intensity value according to delta E and delta H, L 1 And L 2 The evaluation of the line electromagnetic environment is carried out according to the following specific steps:
when Δe is greater than or equal to 0, e=1, and judging whether the signal source generating Δe is a fixed frequency signal source in the target evaluation point, where the fixed frequency signal sources may include a signal base station, a power transmission line, civil or medical equipment used in buildings around the line, a military station, a communication frequency, etc., if the signal source belongs to the fixed frequency signal source, f=0, if the signal source does not belong to the fixed frequency signal source, f=1; Δe <0, e=0.
When Δh is greater than or equal to 0, h=1; Δh <0, then h=0;
the electric field strength test results of the 3 different signal sources of the target evaluation point in the frequency range of 30MHz-3000MHz are as follows: the condition that the electric field intensity value exceeds the limit value of 12V/m occurs in the interval of 1300MHz-1500MHz, namely, the condition accords with delta E to be more than or equal to 0, E=1, and the corresponding signal source is determined to be an indefinite frequency broadcast signal source, so F=1; signal sources exceeding the limit value of 12V/m respectively appear near 100MHz, 1700MHz and 2400MHz, namely, the requirement that delta E is more than or equal to 0 is met, E=1 at the moment, and the corresponding signal source is determined to be a fixed frequency signal source, so that F=0; signal sources with electric field strength values in the range of 30MHz-3000MHz do not exceed the limit value of 12V/m, i.e. meet Δe <0, e=0. Correspondingly, for comparison and judgment of the magnetic field intensity value and the magnetic field intensity threshold value, a similar method is adopted, and the comparison and judgment is completed based on the electromagnetic environment evaluation model, and the description is omitted here.
Based on the above judgment result, when L 2 When the number is =1 and the number is f=1, judging that the evaluation level of the corresponding signal source is level I, and affecting the running of the railway vehicle and the safety of passengers, and reporting relevant departments to find the radiation source for processing or optimizing a line scheme;
when L 2 When the frequency is=1 and the frequency is f=0, the evaluation level of the corresponding signal source is judged to be II, and the wireless communication or signal system of the railway vehicle can be possibly interfered, but the frequency spectrum management of the railway vehicle can be realized, the processing with the same frequency as the fixed frequency radiation source is avoided, and related departments are not required to be reported;
when L 2 When the signal source is=0, the evaluation grade of the corresponding signal source is judged to be grade III, and the signal source in the environment cannot influence the running of the railway vehicle and the safety of passengers, so that the signal source does not need to be processed.
The electromagnetic environment assessment device provided by the embodiment of the invention is described below, and the electromagnetic environment assessment device described below can be regarded as a functional module architecture to be set in a central device for implementing the electromagnetic environment assessment method provided by the embodiment of the invention; the following description may be referred to with respect to the above.
Fig. 3 is a block diagram of an electromagnetic environment assessment apparatus according to an embodiment of the present invention, and referring to fig. 2, the apparatus may include:
a scanning unit 10, configured to scan the radiation signal of the target evaluation point in a preset frequency range, so as to obtain a target radiation signal of at least one signal source;
the analyzing unit 20 is configured to analyze the target radiation signal, and determine an electric field intensity value, a magnetic field intensity value, and a type of the signal source according to an analysis result;
a first acquiring unit 30, configured to acquire an electric field strength threshold value and a magnetic field strength threshold value of the signal source;
and the evaluation unit 40 is configured to determine an evaluation result of the signal source according to a magnitude relation between the electric field intensity value and the electric field intensity threshold value, a magnitude relation between the magnetic field intensity value and the magnetic field intensity threshold value, and the type of the signal source, where the evaluation result characterizes an influence degree of a radiation signal of the signal source on normal running of the rail vehicle.
Optionally, the evaluation result is expressed in an evaluation grade, and the evaluation unit 40 is configured to determine, according to the magnitude relation between the electric field strength value and the electric field strength threshold, the magnitude relation between the magnetic field strength value and the magnetic field strength threshold, and the type of the signal source, the evaluation result of the signal source specifically includes:
if at least one of the electric field strength value not smaller than the electric field strength threshold value and the magnetic field strength value not smaller than the magnetic field strength threshold value is met, and the signal source is an indefinite frequency signal source, determining that the signal source is a class I signal source;
if at least one of the electric field strength value not smaller than the electric field strength threshold value and the magnetic field strength value not smaller than the magnetic field strength threshold value is met, the signal source is a fixed frequency signal source, and the signal source is determined to be a class II signal source;
and if the electric field strength value is smaller than the electric field strength threshold value or the magnetic field strength value is smaller than the magnetic field strength threshold value, determining that the signal source is a class III signal source.
Optionally, the preset frequency range includes a plurality of frequency intervals, and the first obtaining unit 30 is configured to, when obtaining the electric field intensity threshold and the magnetic field intensity threshold of the signal source, specifically include:
respectively determining a frequency interval to which the electric field intensity value belongs and a frequency interval to which the magnetic field intensity value belongs;
determining an electric field intensity threshold value of the electric field intensity value of the signal source according to a frequency interval to which the electric field intensity value belongs;
and determining a magnetic field intensity threshold value of the magnetic field intensity value of the signal source according to the frequency interval to which the magnetic field intensity value belongs.
Optionally, the first obtaining unit 30 is configured to determine, according to a frequency interval to which the electric field intensity value belongs, an electric field intensity threshold value of the electric field intensity value of the signal source, where the first obtaining unit specifically includes:
inquiring a first preset mapping relation, and taking an electric field intensity threshold value corresponding to a frequency interval to which the electric field intensity value belongs as the electric field intensity threshold value of the electric field intensity value of the signal source;
the first preset mapping relation records a corresponding relation between a frequency interval and an electric field intensity threshold.
Optionally, the first obtaining unit 30 is configured to determine, according to a frequency interval to which the magnetic field intensity value belongs, a magnetic field intensity threshold value of the magnetic field intensity value of the signal source, where the magnetic field intensity threshold value specifically includes:
inquiring a second preset mapping relation, and taking a magnetic field intensity threshold value corresponding to a frequency interval to which the magnetic field intensity value belongs as a magnetic field intensity threshold value of the magnetic field intensity value of the signal source;
the second preset mapping relation records the corresponding relation between the frequency interval and the magnetic field intensity threshold value.
Optionally, referring to fig. 4, fig. 4 is a block diagram of another electromagnetic environment assessment apparatus according to an embodiment of the present invention, where on the basis of the embodiment shown in fig. 3, the apparatus further includes:
and the second acquisition unit is used for acquiring an evaluation point map, wherein the evaluation point map comprises all evaluation points along the railway line, and any evaluation point in the evaluation point map is taken as a target evaluation point.
Optionally, referring to fig. 5, fig. 5 is a block diagram of a server provided by an embodiment of the present invention, and referring to fig. 5, the method may include: at least one processor 100, at least one communication interface 200, at least one memory 300, and at least one communication bus 400;
in the embodiment of the present invention, the number of the processor 100, the communication interface 200, the memory 300 and the communication bus 400 is at least one, and the processor 100, the communication interface 200 and the memory 300 complete the communication with each other through the communication bus 400; it will be apparent that the communication connection schematic shown in the processor 100, the communication interface 200, the memory 300 and the communication bus 400 shown in fig. 5 is only optional;
optionally, the communication interface 200 may be an interface of a communication module, such as an interface adapted to a vehicle-mounted OBD interface or other CAN network interface;
the processor 100 may be a central processing unit CPU, or a specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement embodiments of the present invention.
The memory 300, which stores application programs, may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.
The processor 100 is specifically configured to execute an application program in the memory, so as to implement any embodiment of the electromagnetic environment assessment method described above.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of electromagnetic environment assessment, comprising:
scanning the radiation signal of the target evaluation point in a preset frequency range to obtain a target radiation signal of at least one signal source;
analyzing the target radiation signal, and determining an electric field intensity value and a magnetic field intensity value of the signal source and the type of the signal source according to an analysis result;
acquiring an electric field intensity threshold value and a magnetic field intensity threshold value of the signal source;
determining an evaluation result of the signal source according to the magnitude relation between the electric field intensity value and the electric field intensity threshold value, the magnitude relation between the magnetic field intensity value and the magnetic field intensity threshold value and the type of the signal source, wherein the evaluation result represents the influence degree of the radiation signal of the signal source on the normal running of the railway vehicle, and the type of the signal source comprises: a non-fixed frequency signal source and a fixed frequency signal source, the evaluation result comprising: the system comprises a magnetic field strength evaluation value, an electric field strength evaluation value, a first environment evaluation factor and a second environment evaluation factor, wherein the magnetic field strength evaluation value is a difference value between the magnetic field strength value and the magnetic field strength threshold value, the electric field strength evaluation value is a difference value between the electric field strength value and the electric field strength threshold value, the first environment evaluation factor is determined based on the fixed frequency signal source, and the second environment evaluation factor is determined based on the non-fixed frequency signal source.
2. The electromagnetic environment assessment method according to claim 1, wherein the assessment results are expressed in an assessment scale, and the determining the assessment results of the signal source according to the magnitude relation of the electric field strength value and the electric field strength threshold value, the magnitude relation of the magnetic field strength value and the magnetic field strength threshold value, and the type of the signal source includes:
if at least one of the electric field strength value is not smaller than the electric field strength threshold value and the magnetic field strength value is not smaller than the magnetic field strength threshold value, and the signal source is the non-constant frequency signal source, determining that the signal source is a class I signal source;
if at least one of the electric field strength value not smaller than the electric field strength threshold value and the magnetic field strength value not smaller than the magnetic field strength threshold value is met, the signal source is the fixed-frequency signal source, and the signal source is determined to be a class II signal source;
and if the electric field strength value is smaller than the electric field strength threshold value or the magnetic field strength value is smaller than the magnetic field strength threshold value, determining that the signal source is a class III signal source.
3. The electromagnetic environment assessment method according to claim 1, wherein the preset frequency range includes a plurality of frequency intervals, and the acquiring the electric field strength threshold and the magnetic field strength threshold of the signal source includes:
respectively determining a frequency interval to which the electric field intensity value belongs and a frequency interval to which the magnetic field intensity value belongs;
determining an electric field intensity threshold value of the electric field intensity value of the signal source according to a frequency interval to which the electric field intensity value belongs;
and determining a magnetic field intensity threshold value of the magnetic field intensity value of the signal source according to the frequency interval to which the magnetic field intensity value belongs.
4. The electromagnetic environment assessment method according to claim 3, wherein said determining an electric field intensity threshold value of said electric field intensity value of said signal source from a frequency interval to which said electric field intensity value belongs comprises:
inquiring a first preset mapping relation, and taking an electric field intensity threshold value corresponding to a frequency interval to which the electric field intensity value belongs as the electric field intensity threshold value of the electric field intensity value of the signal source;
the first preset mapping relation records a corresponding relation between a frequency interval and an electric field intensity threshold.
5. The electromagnetic environment assessment method according to claim 3, wherein said determining a magnetic field strength threshold value of said magnetic field strength value of said signal source from a frequency interval to which said magnetic field strength value belongs comprises:
inquiring a second preset mapping relation, and taking a magnetic field intensity threshold value corresponding to a frequency interval to which the magnetic field intensity value belongs as a magnetic field intensity threshold value of the magnetic field intensity value of the signal source;
the second preset mapping relation records the corresponding relation between the frequency interval and the magnetic field intensity threshold value.
6. The method of claim 1, further comprising, before said scanning the radiation signal at the target evaluation point within the predetermined frequency range to obtain a target radiation signal of at least one signal source:
acquiring an evaluation point map, wherein the evaluation point map comprises all evaluation points along a railway line;
and taking any evaluation point in the evaluation point map as a target evaluation point.
7. The electromagnetic environment assessment method according to any one of claims 1 to 6, wherein the electric field strength values include an alternating current electric field strength value and a direct current electric field strength value.
8. An electromagnetic environment assessment apparatus, comprising:
the scanning unit is used for scanning the radiation signal of the target evaluation point in a preset frequency range to obtain a target radiation signal of at least one signal source;
the analysis unit is used for analyzing the target radiation signal, and determining an electric field intensity value and a magnetic field intensity value of the signal source and the type of the signal source according to an analysis result;
the first acquisition unit is used for acquiring an electric field intensity threshold value and a magnetic field intensity threshold value of the signal source;
the evaluation unit is configured to determine an evaluation result of the signal source according to a magnitude relation between the electric field intensity value and the electric field intensity threshold value, a magnitude relation between the magnetic field intensity value and the magnetic field intensity threshold value, and a type of the signal source, where the evaluation result characterizes an influence degree of a radiation signal of the signal source on normal running of the rail vehicle, and the type of the signal source includes: a non-fixed frequency signal source and a fixed frequency signal source, the evaluation result comprising: the system comprises a magnetic field strength evaluation value, an electric field strength evaluation value, a first environment evaluation factor and a second environment evaluation factor, wherein the magnetic field strength evaluation value is a difference value between the magnetic field strength value and the magnetic field strength threshold value, the electric field strength evaluation value is a difference value between the electric field strength value and the electric field strength threshold value, the first environment evaluation factor is determined based on the fixed frequency signal source, and the second environment evaluation factor is determined based on the non-fixed frequency signal source.
9. The electromagnetic environment assessment apparatus according to claim 8, wherein the assessment result is represented by an assessment grade, and the assessment unit is configured to determine the assessment result of the signal source according to a magnitude relation between the electric field strength value and the electric field strength threshold value, a magnitude relation between the magnetic field strength value and the magnetic field strength threshold value, and the type of the signal source, specifically including:
if at least one of the electric field strength value is not smaller than the electric field strength threshold value and the magnetic field strength value is not smaller than the magnetic field strength threshold value, and the signal source is the non-constant frequency signal source, determining that the signal source is a class I signal source;
if at least one of the electric field strength value not smaller than the electric field strength threshold value and the magnetic field strength value not smaller than the magnetic field strength threshold value is met, the signal source is the fixed-frequency signal source, and the signal source is determined to be a class II signal source;
and if the electric field strength value is smaller than the electric field strength threshold value or the magnetic field strength value is smaller than the magnetic field strength threshold value, determining that the signal source is a class III signal source.
10. A server, comprising: a memory and a processor; the memory stores a program adapted to be executed by the processor to implement the electromagnetic environment assessment method according to any one of claims 1 to 7.
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| CN114019252B (en) * | 2021-11-04 | 2024-04-05 | 国网江苏省电力有限公司电力科学研究院 | Tapping switch state evaluation method based on arc electromagnetic radiation signals |
| CN114646907B (en) * | 2021-12-24 | 2023-10-20 | 中铁二院工程集团有限责任公司 | Rail transit low-frequency magnetic field on-site measurement method based on machine learning |
| CN114624637B (en) * | 2022-04-21 | 2023-07-14 | 西南交通大学 | Permanent magnet track three-dimensional magnetic field scanning device and scanning method thereof |
| CN114980712B (en) * | 2022-04-26 | 2024-01-19 | 苏州浪潮智能科技有限公司 | Method and device for reducing electromagnetic radiation |
| CN115243271B (en) * | 2022-07-14 | 2023-09-05 | 中国联合网络通信集团有限公司 | Radiation evaluation method, device and storage medium |
| CN115412448B (en) * | 2022-08-24 | 2023-11-21 | 中国联合网络通信集团有限公司 | Network equipment security assessment method, device and storage medium |
| CN116056034B (en) * | 2023-04-03 | 2023-06-09 | 鹰驾科技（深圳）有限公司 | Vehicle-mounted wireless communication analysis regulation and control system based on in-vehicle environment monitoring |
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| CN103926494A (en) * | 2014-04-30 | 2014-07-16 | 国家电网公司 | Interference source determining method and device |
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