Multi-redundancy equipment safety assessment method and system based on radiographic inspection device

Abstract

The invention relates to the technical field of safety assessment, and particularly discloses a multi-redundancy equipment safety assessment method and system based on a radiographic inspection device, and the method specifically comprises the steps: S1, distinguishing a strong current device and a weak current device, and calculating the electromagnetic field intensity; s2, the electromagnetic field intensity at the weak current device is calculated according to the distance, and the comprehensive intensity is obtained; s3, acquiring the electromagnetic field intensity of the weak current device and calculating the corrected electric signal intensity; and S4, judging unsafe equipment based on the corrected electric signal intensity and the electromagnetic field intensity. The invention designs a multi-redundancy equipment safety assessment method and system based on a radiographic inspection device, which are used for judging whether the radiographic inspection device in a flaw detection room needs to be electrically isolated or not, so that the equipment safety is protected, and the normal operation of the flaw detection room is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of safety assessment, and particularly to a multi-redundant device safety assessment method and system based on a ray flaw detection device. Background Art

[0002] A flaw detection room is a dedicated place for non-destructive testing, mainly used for detecting internal defects in materials such as metals. The main equipment includes X-ray industrial flaw detectors and γ-ray flaw detectors.

[0003] For multi-redundant devices based on ray flaw detection devices in a flaw detection room, it usually refers to a configuration method that uses multiple identical or similar ray flaw detection devices to work together in order to improve the detection accuracy, reliability, and fault tolerance of the system. Multiple ray sources can simultaneously irradiate different parts of the object to be detected, and the detector system synchronously receives the ray signals and converts them into images or data. In this way, information on multiple angles or parts of the object to be detected can be obtained in one detection process, significantly shortening the detection time and improving the detection efficiency. The multiple devices detect from different angles and positions, enabling more comprehensive and accurate detection information to be obtained, reducing the errors and blind spots that may occur during the detection by a single device, and thus improving the defect recognition ability and detection accuracy.

[0004] In the prior art, there may be strong electrical signals and weak electrical signals in multi-redundant devices. During normal use, the strong electrical signals will interfere with and affect the weak electrical signals, resulting in damage to the weak electrical devices. Therefore, it is necessary to design a multi-redundant device safety assessment method and system based on a ray flaw detection device to determine whether electrical isolation of the ray flaw detection device in the flaw detection room is required, thereby protecting the device safety and ensuring the normal operation of the flaw detection room. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-redundant device safety assessment method and system based on a ray flaw detection device to solve the above technical problems.

[0006] The purpose of the present invention can be achieved by the following technical solutions: A multi-redundant device safety assessment method and system based on a ray flaw detection device includes the following steps: S1: Denote the ray flaw detection device in the flaw detection room as the target device, and screen out the target devices with a rated voltage V greater than 36 volts and a rated power P greater than a preset power threshold P max as the strong electrical devices, and the remaining target devices as the weak electrical devices; Obtain the length L of the cable of the strong electrical device located in the flaw detection room, and calculate the electromagnetic field intensity generated by the cable of the strong electrical device , where μ is the preset air permeability, r is the radius of the cross-section of the cable of the high-voltage device, and I is the real-time current of the cable of the high-voltage device; S2: Obtain the distance s between the low-voltage device and the high-voltage device, and calculate the electromagnetic field intensity of the high-voltage device at the low-voltage device , where γ represents the preset unit adjustment coefficient; Calculate the electromagnetic field intensity Bl of the high-voltage device at the low-voltage device based on the cable of the high-voltage device, and calculate the comprehensive intensity Bz = Bs + B1 of the high-voltage device and its cable at the low-voltage device; S3: Obtain the electromagnetic field intensity Br of the low-voltage device, and calculate the corrected electrical signal intensity XBr of the low-voltage device through the formula, and the specific formula is: ; where N represents the total number of high-voltage devices in the flaw detection room, Bz i represents the comprehensive intensity of the i-th high-voltage device, and θ i represents the angle between the cable of the i-th high-voltage device and the cable of the low-voltage device; S4: Calculate the similarity K based on the corrected electrical signal intensity XBr and the electromagnetic field intensity Bs. If the similarity K < 80%, mark the corresponding low-voltage device as an unsafe device and apply electrical isolation to the unsafe device.

[0007] As a further solution of the present invention: In the step S1, the method for measuring the length L of the cable of the high-voltage device located in the flaw detection room specifically includes: Obtain the position A where the cable of the high-voltage device enters the flaw detection room and the position B of the corresponding high-voltage device, measure the straight-line distance |AB| between the position A and the position B, and the length L = |AB|.

[0008] As a further solution of the present invention: In the step S1, ignore the electromagnetic field intensity generated by the cable of the low-voltage device and do not participate in the subsequent steps.

[0009] As a further solution of the present invention: In the step S2, the steps for calculating the electromagnetic field intensity Bl of the high-voltage device at the low-voltage device based on the cable of the high-voltage device specifically include: Generate a two-dimensional plane coordinate system, obtain the equation y(x) = kx + b of the straight line corresponding to the cable of the high-voltage device, where k represents the slope of the straight line, b represents the intercept of the straight line, and x is the abscissa of any point on the straight line corresponding to the cable of the high-voltage device; Obtain the distance SL between the low-voltage device and the coordinate point with abscissa x on the cable of the high-voltage device and generate a fitting equation SL(x), and calculate the electromagnetic field intensity , where x1 represents the minimum value of the abscissa of any point on the straight line corresponding to the cable of the high-voltage device, and x2 represents the maximum value of the abscissa of any point on the straight line corresponding to the cable of the high-voltage device.

[0010] As a further solution of the present invention: in the step S3, if the corrected electrical signal intensity XBr and the electromagnetic field intensity Br of the low-voltage device have opposite polarities, the corresponding low-voltage device is marked as an unsafe device.

[0011] As a further solution of the present invention: in the step S2, if the distance s between the low-voltage device and the high-voltage device is less than the preset judgment distance s min , let the electromagnetic field intensity Bs of the high-voltage device at the low-voltage device be B.

[0012] As a further solution of the present invention: in the step S4, the method for calculating the similarity K based on the corrected electrical signal intensity XBr and the electromagnetic field intensity Bs specifically includes: Obtain the angle δ between the cable of the low-voltage device and the preset direction, and calculate the magnetic field angle μ1 = δ + π / 2; Obtain the angle ρ between the cable of the high-voltage device and the preset direction, calculate the interference magnetic field angle μ2 = ρ + π / 2, and calculate the similarity .

[0013] A multi-redundant device safety assessment system based on a ray flaw detection device, including: Device magnetic field calculation module: Denote the ray flaw detection device in the flaw detection room as the target device, and screen out the target devices with a rated voltage V greater than 36 volts and a rated power P greater than the preset power threshold P max The target devices are denoted as high-voltage devices, and the remaining target devices are denoted as low-voltage devices; Obtain the length L of the cable of the high-voltage device located in the flaw detection room, and calculate the electromagnetic field intensity generated by the cable of the high-voltage device , where μ is the preset air magnetic permeability, r is the radius of the cross-section of the cable of the high-voltage device, and I is the real-time current of the cable of the high-voltage device; Cable magnetic field calculation module: Obtain the distance s between the low-voltage device and the high-voltage device, and calculate the electromagnetic field intensity of the high-voltage device at the low-voltage device , where γ represents the preset unit adjustment coefficient; Based on the cable of the high-voltage device, calculate the electromagnetic field intensity Bl at the low-voltage device, and calculate the comprehensive intensity Bz = Bs + B1 of the high-voltage device and the cable of the high-voltage device at the low-voltage device; Correction module: Obtain the electromagnetic field intensity Br of the low-voltage device, and calculate the corrected electrical signal intensity XBr of the low-voltage device through the formula, and the specific formula is: ; Among them, N represents the total number of high-voltage electrical devices in the flaw detection room, Bz i represents the comprehensive intensity of the i-th high-voltage electrical device, and θ i represents the included angle between the cable of the i-th high-voltage electrical device and the cable of the low-voltage electrical device; Judgment module: Calculate the similarity K based on the corrected electrical signal intensity XBr and the electromagnetic field intensity Bs. If the similarity K < 80%, mark the corresponding low-voltage electrical device as an unsafe device and apply electrical isolation to the unsafe device.

[0014] Advantages of the present invention: In the present invention, due to the differences in the electromagnetic interference signal intensities generated by the devices in the flaw detection room under different voltages. For high-voltage electrical devices, because of their high operating voltage and large current, the electromagnetic interference signal intensities they generate are relatively high, and the influence range is also relatively large. Some large high-voltage electrical devices will radiate strong electromagnetic energy into the surrounding space during operation, and this energy may interfere with the surrounding electronic devices and communication lines. On the contrary, due to the low operating voltage and small current of low-voltage electrical devices, the electromagnetic interference signals they generate are relatively weak, and the influence range is also relatively small.

[0015] In view of the above characteristics, in the present invention, only the electromagnetic interference generated by high-voltage electrical devices on low-voltage electrical devices is considered, while the interference caused by low-voltage electrical devices on high-voltage electrical devices is ignored. This is because the electromagnetic interference generated by high-voltage electrical devices is more prominent in terms of intensity and range, and poses a greater potential threat to the overall stability and reliability of the system. The interference of low-voltage electrical devices on high-voltage electrical devices is relatively small, and its influence can be ignored in most cases. This can make the research focus more clear and simplify the analysis process.

[0016] However, it should be particularly pointed out that due to the existence of the cables of high-voltage electrical devices, the situation becomes more complicated. As the carrier of electric energy transmission, the cables of high-voltage electrical devices will inevitably generate electromagnetic interference during their operation. Moreover, due to the diversity of factors such as the structure and layout of the cables, it is very difficult to accurately quantify the electromagnetic interference generated by the cables. To solve this problem, the present invention proposes an innovative method, that is, quantifying the electromagnetic interference generated by the cables of high-voltage electrical devices in the form of integration.

[0017] In this way, the electromagnetic interference generated by the cables at different positions and different times is accumulated and calculated, so as to obtain a comprehensive quantification index to represent the electromagnetic interference level of the entire cable, and realize the detection of the electrical signals of the entire cable. At the same time, this method is also conducive to simplifying the calculation process. In actual engineering applications, it is very difficult to accurately calculate the electromagnetic interference intensity at each point, and many factors need to be considered. By using the integration quantification method, the complex electromagnetic field calculation can be transformed into a relatively simple mathematical integration operation, greatly reducing the calculation amount and calculation difficulty, and improving the calculation efficiency.

[0018] In addition, during the study of electromagnetic interference, there are two important factors that need to be noted. One is that the intensity of electromagnetic interference decreases with the increase of distance. According to the basic principles of electromagnetics, the change of electromagnetic field intensity with distance can be approximately expressed by a formula, showing an inverse relationship. This means that the farther away from the electromagnetic interference source, the less interference is received.

[0019] The second is that since the high-power electrical device is powered by a cable, for the purpose of simplifying calculations, the electromagnetic field intensity generated by the cable in this invention is approximately regarded as the electromagnetic field intensity of the device. In actual situations, the structure and working principle of the high-power electrical device itself are relatively complex, and the electromagnetic field distribution it generates is also irregular. The cable, as the channel for power transmission, the electromagnetic field it generates can, to a certain extent, reflect the electromagnetic characteristics of the high-power electrical device. Through this approximation, the complex electromagnetic field problem of the high-power electrical device can be simplified into a relatively simple cable electromagnetic field problem for analysis and calculation, thereby further reducing the difficulty and complexity of the research, and at the same time ensuring the accuracy and reliability of the calculation results to a certain extent.

[0020] After that, a comprehensive calculation is carried out on the electromagnetic field intensity generated by the high-power electrical device and the cable of the high-power electrical device. First, for the calculation of the electromagnetic field intensity of the high-power electrical device itself, various factors such as its working voltage, current magnitude, the geometric shape of the device, and the surrounding medium need to be considered.

[0021] After separately calculating the electromagnetic field intensity of the high-power electrical device and the cable of the high-power electrical device, a comprehensive calculation is carried out on the two. This comprehensive calculation process is not simply adding the numerical values, but rather, according to the superposition principle of the electromagnetic field, factors such as the direction and phase of the electromagnetic field need to be considered, and the electromagnetic fields generated by the two are vectorially synthesized. Through this comprehensive calculation, the obtained comprehensive calculation value can reflect the comprehensive electromagnetic field intensity at the location of the weak electrical device in the whole system. This comprehensive electromagnetic field intensity is a key indicator, which comprehensively considers the electromagnetic influence of the high-power electrical device and its cable on the location of the weak electrical device, providing basic data for subsequent evaluation of the impact of electromagnetic interference on the weak electrical device.

[0022] Then, the electromagnetic field intensity of the weak electrical device is obtained. The electromagnetic field intensity of the weak electrical device is relatively weak, but precise measurement and calculation are also required. When obtaining the electromagnetic field intensity of the weak electrical device, special electromagnetic measurement equipment, such as an electromagnetic field intensity tester, etc., needs to be used to conduct on-site measurement on it in the working environment of the weak electrical device according to certain measurement specifications and methods. At the same time, factors such as the working state of the weak electrical device itself and the equipment layout also need to be considered for their influence on the electromagnetic field intensity.

[0023] It should be noted that when calculating the influence of electromagnetic interference generated by high - voltage devices on the signals of low - voltage devices, the included - angle problem between the two needs to be considered. This is because the electromagnetic field is a physical quantity with directionality. According to the right - hand rule, the direction of the magnetic - field loop can be determined. The right - hand rule is an important law in electromagnetics, which stipulates the specific relationship between the current direction and the magnetic - field direction. When we know the direction of the magnetic field generated by the high - voltage device, we can determine the direction of the magnetic - field loop according to the right - hand rule. When calculating the corrected electrical - signal strength, it is necessary to calculate the corrected electrical - signal strength based on the angle between the two. Specifically, when there is an included - angle between the direction of the magnetic field generated by the high - voltage device and the signal - transmission direction of the low - voltage device, the influence of the magnetic field on the electrical signal will change with the change of the included - angle. When the included - angle is 0° or 180°, the influence of the magnetic field on the electrical signal is the largest; when the included - angle is 90°, the influence of the magnetic field on the electrical signal is the smallest. By accurately calculating the included - angle between the two and correcting the electrical - signal strength according to a certain mathematical model, the actual influence of the electromagnetic interference generated by the high - voltage device on the signals of the low - voltage device can be more accurately reflected. This can ensure the accuracy of subsequent screening of unsafe devices and avoid misjudgment of the influence of electromagnetic interference due to the neglect of the included - angle factor.

[0024] Finally, calculate the similarity K based on the corrected electrical - signal strength XBr and the electromagnetic - field strength Bs. The calculation of the similarity K is achieved through a specific algorithm, which comprehensively considers factors such as the numerical magnitudes, variation trends of the corrected electrical - signal strength and the electromagnetic - field strength, and their correlation degree. Through this calculation method, a numerical value reflecting the similarity between the two can be obtained. In practical applications, low - voltage devices with a similarity lower than 80% are marked as unsafe devices. This is because when the similarity is lower than 80%, it indicates that the electromagnetic environment where the low - voltage device is located is significantly different from the electromagnetic environment required for its normal operation, and it may be subject to strong electromagnetic interference, thus affecting the stability and reliability of its operation. In order to protect these unsafe devices from the damage of electromagnetic interference, electrical - isolation measures need to be applied to them. Electrical isolation can be achieved in various ways, such as wrapping the device with insulating materials, placing the device in a shielding enclosure, or using an isolation transformer, etc. Through these electrical - isolation measures, the connection between the unsafe device and the external electromagnetic - interference source can be effectively cut off, thereby protecting the device safety and ensuring the normal operation of the flaw - detection room.

[0025] In summary, the present invention designs a multi - redundant device safety - assessment method and system based on a ray - flaw - detection device, which is used to determine whether electrical isolation of the ray - flaw - detection device in the flaw - detection room is required, thereby protecting the device safety and ensuring the normal operation of the flaw - detection room. Brief Description of the Drawings

[0026] The following further describes the present invention with reference to the drawings.

[0027] Figure 1 It is a schematic flowchart of a multi-redundant device safety assessment method and system based on a ray flaw detection device according to the present invention. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0029] Please refer to Figure 1 As shown, the present invention is a multi-redundant device safety assessment method and system based on a ray flaw detection device, including the following steps: S1: Denote the ray flaw detection device in the flaw detection room as the target device, and screen out the target devices with a rated voltage V greater than 36 volts and a rated power P greater than the preset power threshold P max The target devices are denoted as high-voltage devices, and the remaining target devices are denoted as low-voltage devices; Obtain the length L of the cable of the high-voltage device located in the flaw detection room, and calculate the electromagnetic field intensity generated by the cable of the high-voltage device , where μ is the preset air magnetic permeability, r is the radius of the cross-section of the cable of the high-voltage device, and I is the real-time current of the cable of the high-voltage device; S2: Obtain the distance s between the low-voltage device and the high-voltage device, and calculate the electromagnetic field intensity of the high-voltage device at the low-voltage device , where γ represents the preset unit adjustment coefficient; Based on the cable of the high-voltage device, calculate the electromagnetic field intensity Bl at the low-voltage device, and calculate the comprehensive intensity Bz = Bs + B1 of the high-voltage device and the cable of the high-voltage device at the low-voltage device; S3: Obtain the electromagnetic field intensity Br of the low-voltage device, and calculate the corrected electrical signal intensity XBr of the low-voltage device through the formula. The specific formula is: ; where N represents the total number of high-voltage devices in the flaw detection room, Bz i represents the comprehensive intensity of the i-th high-voltage device, and θ i represents the included angle between the cable of the i-th high-voltage device and the cable of the low-voltage device; S4: Calculate the similarity K based on the corrected electrical signal intensity XBr and the electromagnetic field intensity Bs. If the similarity K < 80%, mark the corresponding low-voltage device as an unsafe device and apply electrical isolation to the unsafe device.

[0030] It should be noted that due to the differences in the intensity of electromagnetic interference signals generated by the devices in the flaw detection room under different voltages. For high-voltage devices, because of their high working voltage and large current, the intensity of the electromagnetic interference signals they generate is relatively high, and the influence range is also relatively large. Some large high-voltage devices will radiate strong electromagnetic energy into the surrounding space during operation, and these energies may interfere with the surrounding electronic devices and communication lines. On the contrary, due to their low working voltage and small current, low-voltage devices generate relatively weak electromagnetic interference signals, and the influence range is also small.

[0031] In view of the above characteristics, in the present invention, only the electromagnetic interference generated by high-voltage devices on low-voltage devices is mainly considered, while the interference caused by low-voltage devices on high-voltage devices is ignored. This is because the electromagnetic interference generated by high-voltage devices is more prominent in terms of intensity and range, and poses a greater potential threat to the overall stability and reliability of the system. The interference of low-voltage devices on high-voltage devices is relatively small and can be ignored in most cases, which can make the research focus more clear and simplify the analysis process.

[0032] However, it should be particularly pointed out that due to the existence of the cables of high-voltage devices, the situation becomes more complicated. As the carrier for electric energy transmission, the cables of high-voltage devices will also inevitably generate electromagnetic interference during their operation. Moreover, due to the diversity of factors such as the structure and layout of the cables, it is very difficult to accurately quantify the electromagnetic interference generated by the cables. To solve this problem, the present invention proposes an innovative method, that is, to quantify the electromagnetic interference generated by the cables of high-voltage devices in the form of integration.

[0033] In this way, the electromagnetic interference generated by the cables at different positions and different times is accumulated and calculated, so as to obtain a comprehensive quantization index to represent the electromagnetic interference level of the entire cable, and realize the detection of the electrical signals of the entire cable. At the same time, this method is also conducive to simplifying the calculation process. In actual engineering applications, it is very difficult to accurately calculate the intensity of electromagnetic interference at each point, and many factors need to be considered. By using the integration quantization method, the complex electromagnetic field calculation can be transformed into a relatively simple mathematical integration operation, greatly reducing the calculation amount and calculation difficulty, and improving the calculation efficiency.

[0034] In addition, there are two important factors that need to be noted during the study of electromagnetic interference. One is that the intensity of electromagnetic interference will weaken with the increase of distance. According to the basic principles of electromagnetism, it can be approximately expressed by a formula that the change of electromagnetic field intensity with distance shows an inverse ratio relationship. This means that the farther away from the electromagnetic interference source, the less interference is received.

[0035] Second, since the high-voltage device is powered by a cable, for the purpose of simplifying calculations, the present invention approximates the electromagnetic field intensity generated by the cable as the electromagnetic field intensity of the device. In actual situations, the structure and working principle of the high-voltage device itself are relatively complex, and the electromagnetic field distribution it generates is also irregular. As a channel for power transmission, the electromagnetic field generated by the cable can, to a certain extent, reflect the electromagnetic characteristics of the high-voltage device. Through this approximation, the complex electromagnetic field problem of the high-voltage device can be simplified into a relatively simple electromagnetic field problem of the cable for analysis and calculation, thereby further reducing the difficulty and complexity of the research, while ensuring the accuracy and reliability of the calculation results to a certain extent.

[0036] After that, a comprehensive calculation is performed on the electromagnetic field intensity generated by the high-voltage device and the cable of the high-voltage device. First, for the calculation of the electromagnetic field intensity of the high-voltage device itself, various factors such as its working voltage, current magnitude, geometric shape of the device, and surrounding medium need to be considered.

[0037] After separately calculating the electromagnetic field intensity of the high-voltage device and the cable of the high-voltage device, the two are comprehensively calculated. This comprehensive calculation process is not simply a numerical addition, but rather, according to the superposition principle of the electromagnetic field, factors such as the direction and phase of the electromagnetic field need to be considered, and the electromagnetic fields generated by the two are vectorially synthesized. Through this comprehensive calculation, the obtained comprehensive calculation value can reflect the comprehensive electromagnetic field intensity of the entire system at the location of the low-voltage device. This comprehensive electromagnetic field intensity is a key indicator, which comprehensively considers the electromagnetic influence of the high-voltage device and its cable on the location of the low-voltage device, providing basic data for subsequent evaluation of the impact of electromagnetic interference on the low-voltage device.

[0038] Then, the electromagnetic field intensity of the low-voltage device is obtained. The electromagnetic field intensity of the low-voltage device is relatively weak, but precise measurement and calculation are also required. When obtaining the electromagnetic field intensity of the low-voltage device, special electromagnetic measurement equipment, such as an electromagnetic field intensity tester, etc., needs to be used to conduct on-site measurement on it in the working environment of the low-voltage device according to certain measurement specifications and methods. At the same time, factors such as the working state of the low-voltage device itself and the equipment layout also need to be considered for their influence on the electromagnetic field intensity.

[0039] It should be noted that when calculating the influence of electromagnetic interference generated by high-voltage devices on the signals of low-voltage devices, the angle between the two needs to be considered. This is because the electromagnetic field is a physical quantity with directionality. According to the right-hand rule, the direction of the magnetic field loop can be determined. The right-hand rule is an important law in electromagnetism, which stipulates the specific relationship between the current direction and the magnetic field direction. When we know the direction of the magnetic field generated by the high-voltage device, we can determine the direction of the magnetic field loop according to the right-hand rule. When calculating the corrected electrical signal strength, the corrected electrical signal strength needs to be calculated based on the angle between the two. Specifically, when there is an angle between the direction of the magnetic field generated by the high-voltage device and the signal transmission direction of the low-voltage device, the influence of the magnetic field on the electrical signal will change with the change of the angle. When the angle is 0° or 180°, the influence of the magnetic field on the electrical signal is the greatest; when the angle is 90°, the influence of the magnetic field on the electrical signal is the smallest. By accurately calculating the angle between the two and correcting the electrical signal strength according to a certain mathematical model, the actual influence of the electromagnetic interference generated by the high-voltage device on the low-voltage device signal can be more accurately reflected. This can ensure the accuracy of subsequent screening of unsafe devices and avoid misjudgment of the influence of electromagnetic interference due to the neglect of the angle factor.

[0040] Finally, the similarity K is calculated based on the corrected electrical signal strength XBr and the electromagnetic field strength Bs. The calculation of the similarity K is achieved through a specific algorithm, which comprehensively considers factors such as the numerical magnitudes, change trends, and the degree of association between the corrected electrical signal strength and the electromagnetic field strength. Through this calculation method, a numerical value reflecting the similarity between the two can be obtained. In practical applications, low-voltage devices with a similarity lower than 80% are marked as unsafe devices. This is because when the similarity is lower than 80%, it indicates that the electromagnetic environment where the low-voltage device is located is significantly different from the electromagnetic environment required for its normal operation, and it may be subject to strong electromagnetic interference, thereby affecting the stability and reliability of its operation. To protect these unsafe devices from the damage of electromagnetic interference, electrical isolation measures need to be applied. Electrical isolation can be achieved in various ways, such as wrapping the device with insulating materials, placing the device in a shielding enclosure, or using an isolation transformer. Through these electrical isolation measures, the connection between the unsafe device and the external electromagnetic interference source can be effectively cut off, thereby protecting the device safety and ensuring the normal operation of the flaw detection room.

[0041] In another preferred embodiment of the present invention, the method for measuring the length L of the cable of the high-voltage device located in the flaw detection room specifically includes: Obtain the position A where the cable of the high-voltage device enters the flaw detection room and the position B of the corresponding high-voltage device, measure the straight-line distance |AB| between position A and position B, and the length L = |AB|.

[0042] It should be noted that in actual situations, it is impossible to lay the cable in a straight line. Therefore, after connecting the two ends of the cable as points for equivalent simulation, the calculation process for simplifying the calculation of the electromagnetic field strength of the cable is simplified.

[0043] In another preferred embodiment of the present invention, the electromagnetic field strength generated by the cable of the weak electrical device is ignored and does not participate in the subsequent steps.

[0044] It can be understood that due to the low working voltage and small current of the weak electrical device, the generated electromagnetic interference signal is relatively weak and the influence range is also small. For example, in a common power control system, its electromagnetic radiation level is usually low and will not cause obvious interference to other devices in general environments.

[0045] In another preferred embodiment of the present invention, the steps for calculating the electromagnetic field strength Bl at the weak electrical device based on the cable of the strong electrical device specifically include: Generate a two-dimensional plane coordinate system, and obtain the equation of the straight line corresponding to the cable of the strong electrical device y(x)=kx + b, where k represents the slope of the straight line, b represents the intercept of the straight line, and x is the abscissa of any point on the straight line corresponding to the cable of the strong electrical device; Obtain the distance SL between the coordinate point with abscissa x on the cable of the weak electrical device and the cable of the strong electrical device and generate a fitting equation SL(x), and calculate the electromagnetic field strength , where x1 represents the minimum value of the abscissa of any point on the straight line corresponding to the cable of the strong electrical device, and x2 represents the maximum value of the abscissa of any point on the straight line corresponding to the cable of the strong electrical device.

[0046] In another preferred embodiment of the present invention, if the corrected electrical signal strength XBr and the electromagnetic field strength Br of the weak electrical device have opposite polarities, the corresponding weak electrical device is marked as an unsafe device.

[0047] It should be noted that to simplify the operation process, if the corrected electrical signal strength XBr and the electromagnetic field strength Br of the weak electrical device have opposite polarities, then it can be directly determined that the corresponding weak electrical device is marked as an unsafe device, thus achieving the purpose of simplifying the process.

[0048] In another preferred embodiment of the present invention, if the distance s between the weak electrical device and the strong electrical device is less than the preset judgment distance s min , let the electromagnetic field strength Bs of the strong electrical device at the weak electrical device be B.

[0049] It can be understood that when the distance s between the weak electrical device and the strong electrical device satisfies this condition, it means that the two are in a relatively close position. At this time, the electromagnetic field generated by the strong electrical device may have a relatively significant impact on the weak electrical device. In this case, for the sake of simplifying the calculation, let the electromagnetic field strength Bs of the strong electrical device at the weak electrical device be B.

[0050] In another preferred embodiment of the present invention, the method for calculating the similarity K based on the corrected electrical signal strength XBr and the electromagnetic field strength Bs specifically includes: Obtain the angle δ between the cable of the weak electrical device and the preset direction, and calculate the magnetic field angle μ1 = δ + π / 2; Obtain the angle ρ between the cable of the strong electrical device and the preset direction, calculate the interference magnetic field angle μ2 = ρ + π / 2, and calculate the similarity .

[0051] A multi-redundancy device safety assessment system based on a ray detection device includes: Device magnetic field calculation module: Denote the ray detection device in the detection room as the target device, and screen out the target devices with a rated voltage V greater than 36 volts and a rated power P greater than the preset power threshold P max as strong electrical devices, and the remaining target devices as weak electrical devices; Obtain the length L of the cable of the strong electrical device located in the detection room, and calculate the electromagnetic field strength generated by the cable of the strong electrical device , where μ is the preset magnetic permeability of air, r is the radius of the cross-section of the cable of the strong electrical device, and I is the real-time current of the cable of the strong electrical device; Cable magnetic field calculation module: Obtain the distance s between the weak electrical device and the strong electrical device, and calculate the electromagnetic field strength of the strong electrical device at the weak electrical device , where γ represents the preset unit adjustment coefficient; Calculate the electromagnetic field strength Bl of the strong electrical device at the weak electrical device based on the cable of the strong electrical device, and calculate the combined strength Bz = Bs + B1 of the strong electrical device and the cable of the strong electrical device at the weak electrical device; Correction module: Obtain the electromagnetic field strength Br of the weak electrical device, and calculate the corrected electrical signal strength XBr of the weak electrical device through the formula, and the specific formula is: ; where N represents the total number of strong electrical devices in the detection room, Bz i represents the combined strength of the i-th strong electrical device, and θ i represents the angle between the cable of the i-th strong electrical device and the cable of the weak electrical device; Judgment module: Calculate the similarity K based on the corrected electrical signal strength XBr and the electromagnetic field strength Bs. If the similarity K < 80%, mark the corresponding weak electrical device as an unsafe device and apply electrical isolation to the unsafe device.

[0052] The above has described in detail an embodiment of the present invention, but the above content is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made in accordance with the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. A multi-redundant device safety assessment method based on a ray flaw detection device, characterized in that, It includes the following steps: S1: Denote the ray flaw detection device in the flaw detection room as the target device, and screen out the target devices with a rated voltage V greater than 36 volts and a rated power P greater than the preset power threshold P max as the high-voltage devices, and the remaining target devices as the low-voltage devices; Obtain the length L of the cable of the high-voltage device located inside the flaw detection room, and calculate the electromagnetic field intensity generated by the cable of the high-voltage device , where μ is the preset magnetic permeability of air, r is the radius of the cross-section of the cable of the high-voltage device, and I is the real-time current of the cable of the high-voltage device; S2: Obtain the distance s between the low-voltage device and the high-voltage device, and calculate the electromagnetic field intensity of the high-voltage device at the low-voltage device , where γ represents a preset unit adjustment coefficient; Based on the cable of the high-voltage device, calculate the electromagnetic field strength Bl at the low-voltage device, and calculate the combined strength Bz = Bs + B1 of the high-voltage device and its cable at the low-voltage device; S3: Obtain the electromagnetic field strength Br of the low-voltage device, and calculate the corrected electrical signal strength XBr of the low-voltage device through the formula. The specific formula is: ； Among them, N represents the total number of high-voltage devices in the flaw detection room, Bz i represents the comprehensive intensity of the i-th high-voltage device, θ i represents the angle between the cable of the i-th high-voltage device and the cable of the low-voltage device; S4: Calculate the similarity K based on the corrected electrical signal strength XBr and the electromagnetic field strength Bs. If the similarity K < 80%, mark the corresponding low-voltage device as an unsafe device and apply electrical isolation to the unsafe device.

2. The multi-redundant device safety assessment method based on a ray flaw detection device according to claim 1, wherein, In the step S1, the method for measuring the length L of the cable of the high-voltage device located in the flaw detection room specifically includes: Obtain the position A where the cable of the high-voltage device enters the flaw detection room and the position B of the corresponding high-voltage device, and measure the straight-line distance |AB| between the position A and the position B. The length L = |AB|.

3. The multi-redundant device safety assessment method and system based on a ray flaw detection device according to claim 1, wherein In the step S1, ignore the electromagnetic field strength generated by the cable of the low-voltage device and do not participate in the subsequent steps.

4. The multi-redundant device safety assessment method and system based on a ray flaw detection device according to claim 1, wherein In the step S2, the step of calculating the electromagnetic field strength Bl at the low-voltage device based on the cable of the high-voltage device specifically includes: Generate a two-dimensional plane coordinate system, and obtain the equation of the straight line corresponding to the cable of the high-voltage device y(x) = kx + b, where k represents the slope of the straight line, b represents the intercept of the straight line, and x is the abscissa of any point on the straight line corresponding to the cable of the high-voltage device; Obtain the distance SL between the coordinate points with abscissa x on the cables of the low-voltage device and the high-voltage device, generate the fitting equation SL(x), and calculate the electromagnetic field strength , where x1 represents the minimum value of the abscissa of any point on the straight line corresponding to the cable of the high-voltage device, and x2 represents the maximum value of the abscissa of any point on the straight line corresponding to the cable of the high-voltage device.

5. The multi-redundant device safety assessment method and system based on a ray flaw detection device according to claim 1, wherein In the step S3, if the positive and negative of the corrected electrical signal strength XBr and the electromagnetic field strength Br of the low-voltage device are opposite, mark the corresponding low-voltage device as an unsafe device.

6. The multi-redundant device safety assessment method and system based on a ray flaw detection device according to claim 1, characterized in that, In the step S2, if the distance s between the weak current device and the strong current device is less than a preset judgment distance s min , the electromagnetic field strength Bs of the strong current device at the weak current device is set to B.

7. The multi-redundant device safety assessment method and system based on a ray flaw detection device according to claim 1, wherein In the step S4, the method for calculating the similarity K based on the corrected electrical signal strength XBr and the electromagnetic field strength Bs specifically includes: Obtain the angle δ between the cable of the low-voltage device and the preset direction, and calculate the magnetic field angle μ1 = δ + π / 2; Obtain the angle ρ between the cable of the high-voltage device and the preset direction, calculate the interference magnetic field angle μ2 = ρ + π / 2, and calculate the similarity .

8. A multi-redundant device safety assessment system based on a radiographic inspection device, characterized in that, It includes: Device magnetic field calculation module: Denote the radiographic device in the flaw detection room as the target device, and screen out the target devices with a rated voltage V greater than 36 volts and a rated power P greater than the preset power threshold P max as high-power devices, and denote the remaining target devices as low-power devices; Obtain the length L of the cable of the high-voltage device located in the flaw detection room, and calculate the electromagnetic field intensity generated by the cable of the high-voltage device , where μ is the preset magnetic permeability of air, r is the radius of the cross-section of the cable of the high-voltage device, and I is the real-time current of the cable of the high-voltage device; Cable magnetic field calculation module: Obtain the distance s between the weak current device and the strong current device, and calculate the electromagnetic field intensity of the strong current device at the weak current device , where γ represents a preset unit adjustment coefficient; Based on the cable of the high-voltage device, calculate the electromagnetic field strength Bl at the low-voltage device, and calculate the combined strength Bz = Bs + B1 of the high-voltage device and its cable at the low-voltage device; Correction module: Obtain the electromagnetic field strength Br of the low-voltage device, and calculate the corrected electrical signal strength XBr of the low-voltage device through the formula. The specific formula is: ； where N represents the total number of high-voltage devices in the flaw detection room, Bz i represents the comprehensive intensity of the i-th high-voltage device, and θ i represents the angle between the cable of the i-th high-voltage device and the cable of the low-voltage device; Judgment module: Calculate the similarity K based on the corrected electrical signal strength XBr and the electromagnetic field strength Bs. If the similarity K < 80%, mark the corresponding low-voltage device as an unsafe device and apply electrical isolation to the unsafe device.

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