Electromagnetic safety analysis method based on theoretical calculation and index evaluation

Abstract

The invention discloses an electromagnetic safety analysis method based on theoretical calculation and index evaluation, and the method comprises the steps: determining a pitch angle and an azimuth angle of a transmitting device pointing to a sensitive region point according to the space coordinates of the transmitting device and the sensitive region point; calculating an interference calculation frequency of the transmitting equipment as a frequency point of the transmitting equipment; determining a gain value through frequency point-angle two-dimensional mapping according to the frequency point and the pitch angle of the transmitting equipment in combination with an antenna gain full-angle query assignment method; according to the azimuth angle and the azimuth coverage angle of the transmitting equipment, determining a level difference value of an azimuth first side lobe relative to a main lobe of the transmitting equipment; determining the electric field intensity of the transmitting equipment in the sensitive area point according to the gain value, the level difference value of a first side lobe relative to a main lobe in the direction of the transmitting equipment and the power attribute value of the transmitting equipment; and according to a preset electromagnetic safety index, performing standard-exceeding evaluation verification on the electric field intensity. The method can solve the problem of electromagnetic safety analysis and evaluation of the sensitive area of the ship.

Description

Technical Field

[0001] This invention belongs to the field of ship electromagnetic compatibility technology, specifically relating to an electromagnetic safety analysis method based on theoretical calculations and index evaluation. Background Technology

[0002] As ships increase in functionality and mission capability, ship platforms are becoming larger, electronic equipment is becoming more numerous, and new technologies are being applied. Shipborne power electronic equipment is now more powerful and operates across wider frequency ranges. Different areas on the ship's deck contain various sensitive zones. High-power electronic equipment may radiate strong electromagnetic environments in these sensitive areas, and excessive electromagnetic radiation can affect the electromagnetic safety of personnel, weaponry, and fuel. Therefore, it is urgent to address the issue of electromagnetic safety analysis and assessment in sensitive areas. Summary of the Invention

[0003] The purpose of this invention is to provide an electromagnetic safety analysis method based on theoretical calculation and index evaluation, which aims to solve the problem of electromagnetic safety analysis and evaluation of high-power electronic and electrical equipment in sensitive areas of ships.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The first aspect of the present invention provides an electromagnetic safety analysis method based on theoretical calculation and index evaluation, the method comprising: Determine the elevation angle of the launching equipment pointing towards the sensitive area point based on the spatial coordinates of the launching equipment and the sensitive area point. and azimuth ; Calculate the interference frequency of the transmitting equipment , where F is the frequency point of the transmitting device; Based on the frequency F and elevation angle of the transmitting equipment By combining the full-angle lookup assignment method for antenna gain, the gain value is determined through a two-dimensional mapping of frequency point and angle. ; According to azimuth And the azimuth coverage angle of the transmitting equipment, to determine the level difference between the first sidelobe and the main lobe of the transmitting equipment. ; Based on gain value The azimuth of the transmitting device and the level difference between the first sidelobe and the main lobe. In addition to the power attribute value of the transmitting equipment, the electric field strength of the transmitting equipment at sensitive points is determined by the electric field environment theory calculation formula; Based on preset electromagnetic safety indicators, the electric field strength is assessed and verified to ensure it does not exceed the limit.

[0005] In the above scheme, the interference calculation frequency of the transmitting equipment is calculated. ,include: ; In the formula, This is the lower limit of the transmission frequency band of the transmitting equipment. This is the upper limit of the transmission frequency band of the transmitting device.

[0006] The above scheme includes a method for assigning antenna gain values ​​across all angles, comprising: Obtain the equipment name, frequency F, and elevation angle of the transmitting equipment. ; Based on the device name of the transmitting device, obtain multiple corresponding device gain instances. Each device gain instance includes frequency attribute value, pitch angle and corresponding gain value. Determine the frequency attribute value ifreq corresponding to frequency point F; Filter out all device gain instances with a frequency attribute value of ifreq, and sort the filtered device gain instances by pitch angle from smallest to largest. Based on pitch angle The gain value of the transmitting device is obtained through linear interpolation or boundary value selection. .

[0007] In the above scheme, determining the frequency attribute value ifreq corresponding to frequency point F includes: If all frequency attribute values ​​of a device gain instance are the same, then that value is the frequency attribute value ifreq; If a device gain instance has multiple frequency attribute values, sort them from smallest to largest and determine the interval where the frequency point F is located: if there are adjacent frequency points m and n that satisfy m≤F≤n, then by comparing the difference between (Fm) and (nF), determine the m or n that is closer to F as the frequency attribute value ifreq. If frequency point F does not fall within any adjacent frequency interval, an error will be reported and the query will be terminated.

[0008] In the above scheme, based on pitch angle The gain value of the transmitting device is obtained through linear interpolation or boundary value selection. ,include: In the sorted device gain instances, find the adjacent pitch angles theta1 and theta2 that satisfy theta1≤theta≤theta2; If found, the gain value of the transmitting device is calculated using a linear interpolation formula. : ; In the formula, This represents the gain ratio; The gain value of the transmitting device is: ; If not found, determine the minimum pitch angle (mintheta) and the maximum pitch angle (maxtheta), and then measure the distance from the pitch angle. The gain value corresponding to the nearest elevation angle is used as the gain value of the transmitting device. .

[0009] In the above scheme, based on the azimuth angle And the azimuth coverage angle of the transmitting equipment, to determine the level difference between the first sidelobe and the main lobe of the transmitting equipment. ,include: If azimuth angle If the signal is located within the azimuth coverage angle of the transmitting equipment, then the level difference between the first sidelobe and the main lobe of the transmitting equipment is... The value is 0; otherwise, the level difference between the first sidelobe and the main lobe of the transmitting device is 0. The azimuth of the transmitting device is directly taken as the level difference between the first sidelobe and the main lobe. .

[0010] In the above scheme, based on the gain value The azimuth of the transmitting device and the level difference between the first sidelobe and the main lobe. The power attribute values ​​of the transmitting equipment are used to determine the electric field strength at sensitive points of the transmitting equipment using electric field environment theory calculation formulas, including: The electric field strength of the transmitting device at sensitive points was calculated using electric field environment theory formulas. : ; ; In the formula, For the transmit feeder loss attribute value of the transmitting equipment; The spatial distance between the launching equipment and the sensitive area. Power density; These are the power attribute values ​​of the transmitting equipment, including peak power and average power.

[0011] In the above scheme, the electric field strength is evaluated and verified to exceed the preset electromagnetic safety indicators, including: Construct a field strength limit matrix that includes device frequency range, sensitive area type, power type, and waveform type; The electric field strength is categorized according to device frequency range, sensitive area type, power type, and waveform type, and matched with the corresponding preset field strength limit thresholds in the field strength limit matrix. Power type includes peak power and average power; the electric field strength calculated for different power types is matched with the corresponding preset field strength limit threshold. For device frequency range matching, the interference calculation frequency of the transmitting device is used. Compare with the device's frequency range to find the upper limit of the field strength corresponding to the transmitting device at the interference calculation frequency. If the interference calculation frequency... If multiple device frequency ranges result in multiple preset field strength limit thresholds, then the smallest preset field strength limit threshold is taken as the indicator. A threshold determination algorithm is used to determine whether the standard is exceeded, and an exceedance evaluation matrix is ​​generated.

[0012] According to a second aspect of the present invention, a computer device is provided, comprising: a processor and a memory, the memory storing a program or instructions executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the electromagnetic safety analysis method based on theoretical calculation and index evaluation as described in any one of the first aspects.

[0013] According to a third aspect of the present invention, a computer-readable storage medium is provided, on which a program or instructions are stored, wherein when executed by a processor, the program or instructions implement the steps of the electromagnetic safety analysis method based on theoretical calculation and index evaluation as described in any one of the first aspects. In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects: This invention can predict the electric field environment of high-power electronic power equipment under different operating conditions. Based on the prediction results, the electromagnetic safety of sensitive areas under a given overall scheme layout can be evaluated by comparing and analyzing with standard index limits. It can support the optimization of the overall compatibility layout of multiple antennas on a water surface platform. Attached Figure Description

[0014] Figure 1 A flowchart for calculating the radiation field and assessing electromagnetic safety in a sensitive area, provided as an embodiment of the present invention; Figure 2 A schematic diagram of an electromagnetic safety analysis matrix for index evaluation provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the hardware structure of a computer device provided in an embodiment of the present invention. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments provided by this invention without inventive effort are within the scope of protection of this invention.

[0016] Obviously, the accompanying drawings described below are merely some examples or embodiments of the present invention. Those skilled in the art can apply the present invention to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this invention, modifications to design, manufacturing, or production based on the technical content disclosed in this invention are merely conventional technical means and should not be construed as insufficient disclosure of the present invention.

[0017] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention may be combined with other embodiments without conflict.

[0018] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "a," "an," "an," "the," and similar words used in this invention do not indicate quantity limitation and may indicate singular or plural. The terms "comprising," "including," "having," and any variations thereof used in this invention are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms "connected," "linked," "coupled," and similar words used in this invention are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "A plurality" used in this invention refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships may exist; for example, "A and / or B" can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following objects have an "or" relationship. The terms "first," "second," and "third" used in this invention are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0019] This invention proposes an electromagnetic safety analysis method based on theoretical calculation and index evaluation, aiming to solve the problem of electromagnetic safety analysis and evaluation of high-power electronic power equipment in sensitive areas of ships.

[0020] like Figure 1 and Figure 2 As shown, the key technical points of the electromagnetic safety analysis method based on theoretical calculation and index evaluation of the present invention are as follows: (1) Antenna gain full-angle query assignment This invention achieves precise gain value extraction and dynamic calculation through a frequency-angle dual-dimensional mapping. Based on the radiation pattern analysis of the transmitting equipment, different frequencies have different gain values. Taking each frequency as a baseline, the gain at each frequency varies within the elevation angle range of -90° to 90°. If the entire elevation angle range contains 180 angular gains, a gain value matrix containing 180 discrete angles (e.g., equally spaced distribution from -90° to 90°) is constructed, forming a three-dimensional data cube (frequency × angle × gain value). The target frequency band is determined using a frequency matching algorithm (linear interpolation and nearest neighbor search). Then, based on the angle parameters, a precise search is performed within the gain matrix of the corresponding frequency. Finally, the obtained gain values ​​are substituted into the theoretical calculation formula for the electric field environment to complete the numerical generation.

[0021] (2) Calculation of electromagnetic radiation field in the region with spatially confined beam pointing downwards This invention utilizes a composite computational technique integrating three-dimensional spatial positioning, beam pointing characteristics, and electromagnetic propagation models. Through coordinate analysis, frequency-angle coupling lookup, and formula derivation, it achieves precise quantitative analysis of the electromagnetic radiation field within a spatial region. Key technical aspects include: spatial coordinate analysis, interference frequency identification, dynamic gain matching, and theoretical calculation of field strength formulas. Using the three-dimensional coordinates (x, y, z) of the transmitting and receiving antennas as input, the elevation angle θ is calculated using a vector angle formula to construct a spatial geometric relationship model. Subsequently, the interference frequency F is extracted, and using F and θ as a dual-dimensional index, pre-stored antenna gain data is retrieved to obtain precise gain values. Ultimately, With transmission power The electric field strength is generated by substituting parameters such as distance into the electric field environment theoretical calculation formula.

[0022] (3) Safety index presets are used to automatically evaluate and verify the exceedance of electric field calculation results. This invention enables rapid determination of electric field environment exceedances by high-power equipment in different sensitive areas through a standardized process. Based on a multi-dimensional safety limit database and intelligent comparison of electromagnetic field calculation results, and using standards (GJB 1389B-2022, etc.) as a basis, a limit matrix is ​​constructed, including frequency bands, sensitive areas (such as residential areas and work areas), power types, and waveform types (pulse waves and continuous waves), forming a hierarchical limit threshold library. First, the electric field environment value (E_cal) output by the equipment is classified and archived according to frequency band, sensitive area, power type, and waveform type, and dynamically matched with a preset field strength limit threshold (E_limit). Then, a threshold determination algorithm (e.g., E_cal > E_limit triggers an exceedance flag) combined with the duty cycle (for pulse waves, the duty cycle is multiplied to obtain the average field strength) completes the exceedance analysis, ultimately generating an exceedance assessment matrix.

[0023] Specifically, this embodiment of the invention illustrates the calculation and analysis process of the electric field environment of a transmitting device in a sensitive area within a certain modeling tool environment, such as... Figure 1 and Figure 2 As shown, the electromagnetic safety analysis method based on theoretical calculation and index evaluation in this embodiment of the invention includes the following process: (1) Antenna gain full-angle query assignment method Input parameters: device name, device pitch angle theta, device frequency F; Output: Device gain dev1GainT.

[0024] 1. Based on the device name attribute, multiple device gain instances will be found within the specified range; 2. Determine the frequency ifreq in the gain table corresponding to frequency point F: a. If the frequency attribute values ​​of these device instances are all the same, then ifreq will be this value; b. If multiple device gain instances have multiple frequency values, sort them from smallest to largest, such as q, e, z. Determine the device frequency and arbitrarily select two adjacent frequency points m and n: I. If m≤F≤n: ① If m and F are closer, i.e. (nF) > (Fm), then ifreq = m; ②Otherwise, ifreq = n; II. Otherwise, the interrupt error gain cannot be found; 3. Filter out all device gain instances with a frequency attribute value of ifreq, and sort the gain instances by pitch plane scan angle attribute value from smallest to largest, where two adjacent values ​​are theta1 and theta2 respectively; I. If theta1≤theta≤theta2; ① Gain Ratio ; ② Device gain dev1GainT = the gain corresponding to theta1 + (the gain corresponding to theta2 - the gain corresponding to theta1) × thetaWeight; II. Otherwise, take the minimum value of the elevation plane scanning angle as mintheta and the maximum value as maxtheta, and determine whether to take the gain corresponding to mintheta or maxtheta: if |theta-mintheta|<|theta-maxtheta|, then the device gain dev1GainT=mintheta, otherwise the device gain dev1GainT=maxtheta.

[0025] (2) Calculation of electromagnetic radiation field in the region with spatially confined beam pointing downwards As shown in Table 1, a series of variables are calculated based on the spatial (x, y, z) coordinates of the transmitting and receiving antennas. Through coordinate analysis, frequency-angle coupling query assignment, and formula derivation, a precise quantitative analysis of the electromagnetic radiation field in a specific spatial region is achieved.

[0026] Table 1 Calculation of Electromagnetic Radiation Field

[0027] (3) Safety index presets are used to automatically evaluate and verify the exceedance of electric field calculation results. The electric field calculation results are automatically verified for compliance using preset safety indicators. ① Security indicator configuration mechanism: By configuring the indicator requirements for different sensitive area types, different equipment frequency ranges, and different waveform types with different power types in tabular form, the indicators are converted from the national military standard document into specific indicator data. Configuration options include: waveform type, device frequency range (MHz), upper limit of field strength corresponding to average power, and upper limit of field strength corresponding to peak power (duty cycle is a parameter required for pulse waves, and the average power can be calculated based on the peak power). ②Automated simulation process: Region type matching: The calculation results are associated with corresponding indicators according to the sensitive region type; Frequency range matching: Compare the interference calculation frequency (harmFreq) of the device with the corresponding frequency range in the index, query the upper limit of the field strength of the device at the interference calculation frequency. If there are multiple overlapping frequency ranges corresponding to multiple indexes, resulting in multiple index values ​​corresponding to the interference calculation frequency, take the smallest upper limit of field strength as the index. Compliance assessment: If the electric field strength is less than or equal to the upper limit, it is considered to meet the constraints (marked as true); otherwise, it is considered to exceed the limit (marked as false). Anomaly marker: When there is no corresponding regional type indicator or the frequency range does not match, it is marked as "indicator missing".

[0028] like Figure 2 As shown, after the simulation is completed, the number of points where the field strength of the display device does not meet the index requirements within the specified sensitive area is displayed.

[0029] In summary, this invention can predict the electric field environment of high-power electronic power equipment under different operating conditions. Based on the prediction results, the electromagnetic safety of sensitive areas under a given overall layout scheme can be evaluated by comparing and analyzing with standard index limits. This invention can support the optimization of the overall compatibility layout of multiple antennas on a water surface platform.

[0030] It should be noted that the steps shown in the above process or in the flowchart of the accompanying figures can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0031] Combination Figure 1 The electromagnetic safety analysis method based on theoretical calculation and index evaluation described in this embodiment of the invention can be implemented by a computer device. Figure 3 This is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. Figure 3 As shown, the device may include a processor 301 and a memory 302 storing computer program instructions.

[0032] Specifically, the processor 301 may include a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of the present invention.

[0033] Memory 302 may include a large-capacity memory for data or instructions. For example, and not limitingly, memory 302 may include a hard disk drive (HDD), a floppy disk drive, a solid-state drive (SSD), flash memory, an optical disk drive, a magneto-optical disk drive, magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 302 may include removable or non-removable (or fixed) media. Where appropriate, memory 302 may be internal or external to a data processing device. In a particular embodiment, memory 302 is non-volatile memory. In a particular embodiment, memory 302 includes read-only memory (ROM) and random access memory (RAM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable read-only memory (PROM), an erasable read-only memory (EPROM), an electrically erasable read-only memory (EEPROM), an electrically alterable read-only memory (EAROM), or flash memory, or a combination of two or more of these. Where appropriate, the RAM can be Static Random-Access Memory (SRAM) or Dynamic Random-Access Memory (DRAM). DRAM can be Fast Page Mode Dynamic Random-Access Memory (FPMDRAM), Extended Data Out Dynamic Random-Access Memory (EDODRAM), Synchronous Dynamic Random-Access Memory (SDRAM), etc.

[0034] The memory 302 can be used to store or cache various data files that need to be processed and / or communicated, as well as possible computer program instructions executed by the processor 301.

[0035] The processor 301 reads and executes computer program instructions stored in the memory 302 to implement any of the electromagnetic safety analysis methods based on theoretical calculations and index evaluations in the above embodiments.

[0036] In some embodiments, the computer device may further include a communication interface 303 and a bus 300. For example, Figure 3 As shown, the processor 301, memory 302, and communication interface 303 are connected through bus 300 and complete communication with each other.

[0037] The communication interface 303 is used to enable communication between the various modules, devices, units, and / or equipment in the embodiments of the present invention. The communication interface 303 can also enable data communication with other components such as external devices, image / data acquisition devices, databases, external storage, and image / data processing workstations.

[0038] Bus 300 includes hardware, software, or both, that couples components of a computer device together. Bus 300 includes, but is not limited to, at least one of the following: data bus, address bus, control bus, expansion bus, and local bus. For example, and not as a limitation, bus 300 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a MicroChannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local Bus (VLB) bus, or other suitable buses, or a combination of two or more of these. Where appropriate, bus 300 may include one or more buses. Although specific buses are described and illustrated in embodiments of the invention, the invention contemplates any suitable bus or interconnect.

[0039] The computer device can execute the electromagnetic safety analysis method based on theoretical calculation and index evaluation in the embodiments of the present invention, thereby achieving a combination of... Figure 1 The electromagnetic safety analysis method described is based on theoretical calculations and index evaluation.

[0040] Furthermore, in conjunction with the electromagnetic safety analysis method based on theoretical calculation and index evaluation in the above embodiments, this invention can be implemented using a computer-readable storage medium. This computer-readable storage medium stores computer program instructions; when executed by a processor, these computer program instructions implement any of the electromagnetic safety analysis methods based on theoretical calculation and index evaluation in the above embodiments.

[0041] It should be noted that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. In addition, depending on the implementation needs, the various steps / components described in this invention can be broken down into more steps / components, or two or more steps / components or parts of steps / components can be combined into new steps / components to achieve the purpose of this invention.

[0042] It will be readily understood by those skilled in the art that the above-described embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A method for electromagnetic safety analysis based on theoretical calculation and index evaluation, characterized in that, The method comprises: determining a pitch angle of the transmitting device pointing to the sensitive area point according to the spatial coordinates of the transmitting device and the sensitive area point and an azimuth angle ; Computing an interference calculation frequency of a transmitting device , as a frequency point F of the transmitting device; According to the frequency point F of the transmitting device and the elevation angle , in combination with the antenna gain full-angle query assignment method, the gain value is determined through frequency point-angle two-dimensional mapping ; According to the azimuth angle and the azimuth coverage angle of the transmitting device, a relative level difference value of an azimuth first side lobe of the transmitting device relative to a main lobe is determined ; According to the gain value , the first side lobe level difference value of the orientation of the transmitting device relative to the main lobe , and the power attribute value of the transmitting device, the electric field intensity of the transmitting device at the sensitive area point is determined by an electric field environment theoretical calculation formula; According to the preset electromagnetic safety index, the electric field intensity is evaluated and verified.

2. The electromagnetic safety analysis method based on theoretical calculation and index evaluation according to claim 1, characterized in that, Computing an interference computation frequency of a transmitting device comprising: ； In the formula, is the lower limit of the transmission frequency band of the transmission device, is the upper limit of the transmission frequency band of the transmission device. 3.The electromagnetic safety analysis method based on theoretical calculation and index evaluation according to claim 1, wherein, The antenna gain full-angle query assignment method comprises: Obtaining the device name, frequency point F and the elevation angle of the transmitting device ; According to the device name of the transmitting device, a plurality of device gain instances corresponding to the device name are obtained, each device gain instance comprising a frequency attribute value, a pitch angle and a corresponding gain value; Determine the frequency attribute value ifreq corresponding to the frequency point F; Filter out the device gain instances with the frequency attribute value ifreq, and sort the filtered device gain instances in ascending order of pitch angle; Based on the pitch angle , the gain value of the transmitting device is obtained by linear interpolation or boundary value .

4. The electromagnetic safety analysis method based on theoretical calculation and index evaluation according to claim 3, characterized in that, Determine the frequency attribute value ifreq corresponding to the frequency point F, comprising: If all the frequency attribute values of the device gain instances are the same, then the value is the frequency attribute value ifreq; If the device gain instances have multiple frequency attribute values, sort them in ascending order, determine the interval in which the frequency point F is located: if there exist adjacent frequency points m and n satisfying m<=F<=n, then by comparing the difference between (F-m) and (n-F), the m or n closer to F is determined as the frequency attribute value ifreq; If the frequency point F does not fall within any adjacent frequency point interval, an error is reported and the query is terminated.

5. The electromagnetic safety analysis method based on theoretical calculation and index evaluation according to claim 3, characterized in that, Based on the pitch angle , the gain value of the transmitting device is obtained by linear interpolation or boundary value , comprising: In the sorted device gain instances, find the adjacent pitch angles theta1 and theta2 that satisfy theta1<=theta<=theta2; If found, the gain value of the transmitting device is calculated by a linear interpolation formula : ； In the formula, is the gain ratio; Then the gain value of the transmitting device is: ； If not found, determine the pitch angle minimum value mintheta and the pitch angle maximum value maxtheta, and the distance pitch angle the gain value corresponding to the most recent pitch angle as the gain value of the transmitting device .

6. The method of electromagnetic safety analysis based on theoretical calculation and index evaluation according to claim 1, characterized in that, According to the azimuth angle and the azimuth coverage angle of the transmitting device, a relative level difference value of an azimuth first side lobe of the transmitting device relative to a main lobe is determined , comprising: if the azimuth angle is within the azimuth coverage angle of the transmitting device, then the azimuth first side lobe relative to main lobe level difference of the transmitting device is 0, otherwise the azimuth first side lobe relative to main lobe level difference of the transmitting device is directly taken .

7. The method of electromagnetic safety analysis based on theoretical calculation and index evaluation according to claim 1, characterized in that, According to the gain value , the first side lobe relative to the main lobe level difference value of the transmitting device , and the power attribute value of the transmitting device, the electric field intensity of the transmitting device at the sensitive area point is determined through an electric field environment theoretical calculation formula, comprising: The electric field intensity of the transmitting device at the point of the sensitive area is calculated by the electric field environment theory calculation formula : ； ； In the formula, is the transmission feeder loss attribute value of the transmission device; is the spatial distance between the transmission device and the sensitive area point; is the power density; is the power attribute value of the transmission device, including peak power and average power.

8. The electromagnetic safety analysis method based on theoretical calculation and index evaluation according to claim 7, characterized in that, According to the preset electromagnetic safety index, the electric field intensity is evaluated and verified, comprising: Construct a field strength limit matrix including device frequency range, sensitive area type, power type and waveform type; The electric field intensity is classified according to the equipment frequency range, the sensitive area type, the power type, and the waveform type, and is matched with the corresponding preset field intensity limit threshold in the field intensity limit matrix; wherein the power type includes two types of peak power and average power, and the electric field intensity calculated according to different power types is matched with the preset field intensity limit threshold corresponding to the power type; when the equipment frequency range is matched, the interference calculation frequency of the transmitting equipment is compared with the equipment frequency range, the corresponding field intensity upper limit of the transmitting equipment at the interference calculation frequency is inquired, and if the interference calculation frequency complies with multiple equipment frequency ranges, multiple preset field intensity limit thresholds are caused to correspond, and the smallest preset field intensity limit threshold is taken as an index; and the field intensity limit threshold is matched with the corresponding preset field intensity limit threshold in the field intensity limit matrix; wherein the power type includes two types of peak power and average power, and the electric field intensity calculated according to different power types is matched with the preset field intensity limit threshold corresponding to the power type; when the equipment frequency range is matched, the interference calculation frequency of the transmitting equipment is compared with the equipment frequency range, the corresponding field intensity upper limit of the transmitting equipment at the interference calculation frequency is inquired, and if the interference calculation frequency complies with multiple equipment frequency ranges, multiple preset field intensity limit thresholds are caused to correspond, and the smallest preset field intensity limit threshold is taken as an index. Determine whether it exceeds the threshold value by threshold determination algorithm, and generate an over-limit evaluation matrix.

9. A computer device, comprising: Comprise: The processor and the memory, the memory stores programs or instructions that can be run on the processor, and the programs or instructions are executed by the processor to realize the steps of the electromagnetic safety analysis method based on theoretical calculation and index evaluation in any one of claims 1-8.

10. A computer-readable storage medium, characterized in that, There are programs or instructions stored thereon, and the programs or instructions are executed by the processor to realize the steps of the electromagnetic safety analysis method based on theoretical calculation and index evaluation in any one of claims 1-8.

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