Evaluation parameter acquisition method of line earthquake early warning system and related product

Abstract

The invention provides a line earthquake early warning system evaluation parameter acquisition method and a related product, and relates to the technical field of earthquake early warning. The method comprises the following steps: according to an epicenter position parameter, a line position parameter and an S wave propagation rate, determining an influence starting moment and an influence ending moment of an earthquake S wave on a line and position mileage parameters of the line influenced at each moment between the influence starting moment and the influence ending moment; in a line mileage-time coordinate system, determining a first integral region of a position mileage parameter of an affected line from an influence starting moment to an influence ending moment, and a second integral region of a line early warning line section from an early warning moment to the influence ending moment; and determining early warning effect evaluation parameters of the line earthquake early warning system according to the overlapping proportion of the first integral region and the second integral region. According to the invention, comprehensive evaluation of the accuracy and timeliness of the line earthquake early warning system is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of line earthquake early warning, and in particular to a method for obtaining evaluation parameters of a line earthquake early warning system and related products. Background Art

[0002] The effectiveness evaluation of earthquake early warning systems usually involves technical indicators and actual application effect evaluation in multiple dimensions, and accuracy and timeliness are the two most important indicators.

[0003] The accuracy of earthquake early warning refers to the accuracy of the results of the algorithm (system, equipment) prediction of parameters such as the location and size of the earthquake, which has two meanings. One is whether the algorithm mistakenly issues or omits an early warning for an event, that is, a false alarm or missed alarm. When false alarms and missed alarms occur, it will cause abnormal feedback from the system and panic among the public. The second is whether its accuracy is accurate when the early warning is correctly issued, which involves the magnitude prediction error (Magnitude Error, the deviation between the magnitude predicted by the algorithm and the actual magnitude) and the epicenter positioning error (Epicenter Error, the deviation between the distance between the epicenter predicted by the algorithm and the actual epicenter). The timeliness of earthquake early warning refers to the degree of advance of the time when the algorithm (system, equipment) obtains the result relative to the arrival time of the influencing seismic wave (S wave) ( ). Advance time ( ) is longer, the more opportunities there are for risk avoidance and emergency response; if it lags behind the arrival time of the influential earthquake wave ( ), then no early warning protection can be provided to the area.

[0004] The accuracy and timeliness of earthquake early warnings are two core metrics for evaluating the performance of early warning algorithms (systems, equipment). Current evaluation methods typically involve: establishing an acceptable timeliness threshold before evaluating accuracy; evaluating timeliness based on a certain level of accuracy; or evaluating both metrics independently. Based on the principles of early warning algorithms, the longer the seismic wave data used, the greater the accuracy of the inference, but timeliness is significantly reduced. Conversely, shorter seismic wave data allows for faster warnings, improving timeliness, but often resulting in less accurate results. This demonstrates the complex trade-off between these two metrics. Existing methods, however, fail to comprehensively evaluate the timeliness and accuracy of earthquake early warning systems, and therefore fail to accurately reflect their effectiveness. Summary of the Invention

[0005] The present invention provides a method for obtaining evaluation parameters of a line earthquake early warning system and related products, which are used to solve the defect that the existing technology cannot simultaneously evaluate the accuracy and timeliness of earthquake early warning, and realize comprehensive evaluation of the accuracy and timeliness of the line earthquake early warning system.

[0006] The present invention provides a method for obtaining evaluation parameters of a line earthquake early warning system, comprising the following steps.

[0007] Obtain epicenter location parameters and line location parameters; Determine the start time and end time of the impact of the earthquake S wave on the line and the affected position mileage parameters of the line at each time between the start time and the end time according to the epicenter location parameters, the line location parameters and the propagation rate of the S wave; In the route mileage-time coordinate system, determining a first integral area of the affected position mileage parameter of the route from the start time of the impact to the end time of the impact; Obtain the warning time and warning section of the line earthquake early warning system; In a route mileage-time coordinate system, determining a second integral area of the route warning route section from the warning time to the impact end time; An early warning effect evaluation parameter of the line earthquake early warning system is determined according to an overlapping ratio between the first integral area and the second integral area.

[0008] According to a method for obtaining evaluation parameters of a line earthquake early warning system provided by the present invention, the method determines the start time of the impact of the earthquake S wave on the line based on the epicenter position parameter, the line position parameter, and the propagation rate of the S wave, including: constructing a line location distribution curve according to the line location parameters; Determine a circular curve tangent to the line position distribution curve; the circular curve has the epicenter position as the center; determining a radius of the circular curve; The impact start time of the line being affected by the earthquake S wave is determined based on the propagation speed of the S wave and the radius of the circular curve.

[0009] A method for obtaining evaluation parameters of a line earthquake early warning system provided by the present invention further includes: Determine the propagation time corresponding to when the S-wave intensity decays to the set value; The time when the line is affected by the earthquake S wave is determined based on the propagation time and the time when the influence starts.

[0010] According to a method for obtaining evaluation parameters of a line earthquake early warning system provided by the present invention, the method determines the affected line position mileage parameters at each time between the start time of the impact and the end time of the impact based on epicenter position parameters, line position parameters, and S-wave propagation rate, including: constructing a line location distribution curve according to the line location parameters; Determining a circular curve corresponding to each time between the start time of the impact and the end time of the impact according to the propagation rate of the S wave; the circular curve has the epicenter position as the circle center and the propagation distance of the S wave at the corresponding time as the radius; The affected position mileage parameters of the line at each moment between the start time of the impact and the end time of the impact are determined based on the intersection of the circular curve corresponding to each moment between the start time of the impact and the end time of the impact and the line position distribution curve.

[0011] According to a method for obtaining evaluation parameters of a line earthquake early warning system provided by the present invention, a line position distribution curve is constructed according to the line position parameters, comprising: The line position parameters are fitted using a curve equation to obtain a line position distribution curve.

[0012] According to a method for obtaining evaluation parameters of a line earthquake early warning system provided by the present invention, the curve equation includes a straight line equation and an arc equation.

[0013] According to a method for obtaining evaluation parameters of a line earthquake early warning system provided by the present invention, determining an evaluation parameter of the line earthquake early warning system according to an overlap ratio between the first integral area and the second integral area includes: Based on the principle that the greater the overlap ratio between the first integral area and the second integral area, the greater the early warning effect evaluation parameter, the early warning effect evaluation parameter of the line earthquake early warning system is determined.

[0014] The present invention also provides a method for obtaining evaluation parameters of a line earthquake early warning system, comprising the following modules: A first parameter acquisition module is used to obtain epicenter position parameters and line position parameters; a line affected parameter determination module, configured to determine, based on epicenter location parameters, line location parameters, and S-wave propagation velocity, the start and end time of the impact of the earthquake S-wave on the line, and the affected position mileage parameters of the line at each time between the start and end time of the impact; A first integration region determination module is configured to determine, in a route mileage-time coordinate system, a first integration region of the affected position mileage parameter of the route from the start time of the impact to the end time of the impact; The second parameter acquisition module is used to obtain the warning time of the line earthquake early warning system and the line warning section; A second integral region determining module is configured to determine, in a route mileage-time coordinate system, a second integral region of the route warning route section from the warning moment to the impact end moment; The early warning effect evaluation parameter determination module is used to determine the early warning effect evaluation parameter of the line earthquake early warning system according to the overlapping ratio of the first integral area and the second integral area.

[0015] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method for obtaining evaluation parameters of a line earthquake early warning system as described in any one of the above is implemented.

[0016] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for obtaining evaluation parameters of a line earthquake early warning system as described in any one of the above is implemented.

[0017] The present invention also provides a computer program product, comprising a computer program, which, when executed by a processor, implements any of the above-mentioned methods for obtaining evaluation parameters of a line earthquake early warning system.

[0018] The method for obtaining evaluation parameters for a line earthquake early warning system and related products provided by the present invention determine, in a line mileage-time coordinate system, a first integral area for the affected line location from the start time to the end time of the impact, and a second integral area for the line warning section from the warning time to the end time of the impact. The method then determines the early warning effectiveness evaluation parameters of the line earthquake early warning system based on the overlap ratio between the first and second integral areas. Specifically, the early warning effectiveness evaluation parameters of the line earthquake early warning system are obtained by comparing the overlap between the "actual area of the line covered by the earthquake S wave" and the "area of the line covered by the warning result" in the time dimension, achieving a comprehensive evaluation of its timeliness and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a flow chart of a method for obtaining evaluation parameters of a line earthquake early warning system provided by an embodiment of the present invention.

[0021] Figure 2 It is a flowchart of a method for determining the impact start time provided by an embodiment of the present invention.

[0022] Figure 3 It is a flowchart of a method for determining the impact end time provided by an embodiment of the present invention.

[0023] Figure 4 It is a flowchart of a method for determining location mileage parameters of a line affected at each moment provided by an embodiment of the present invention.

[0024] Figure 5 It is a schematic diagram of the principle of the earthquake S wave affecting the line in the embodiment of the present invention.

[0025] Figure 6 Schematic diagram of the first integration region in an embodiment of the present invention.

[0026] Figure 7 Schematic diagram of the overlap between the first integral region and the second region in an embodiment of the present invention.

[0027] Figure 8 It is a structural diagram of a device for obtaining evaluation parameters of a line earthquake early warning system provided by an embodiment of the present invention.

[0028] Figure 9 It is a structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0030] Earthquake early warning for railways, highways, and other lines has similarities and differences with traditional earthquake early warning for cities, facilities, and other areas. The similarity lies in the principle of earthquake early warning, that is, issuing warning information in advance of the arrival of S waves; the difference is that the area protected by earthquake early warning for lines is not a single point but a linearly distributed line. Based on the distribution characteristics of the line, the embodiment of the present invention establishes a vector along the line direction (K mileage) and the impact time ( t ) two indicators, by comparing the size of the overlapping part of "the area of the actual earthquake S wave coverage line" and "the area of the warning result coverage line" in the time dimension, the two indicators of accuracy and timeliness are correlated, so as to comprehensively evaluate the warning effect.

[0031] The following combination Figure 1-Figure 7The following describes a method for obtaining evaluation parameters for a line earthquake early warning system, provided in an embodiment of the present invention. This method can be applied to electronic devices such as terminal devices or servers. Terminal devices may include computers, tablet computers, and smart terminals; servers may include standalone servers, cluster servers, or cloud servers. This method can also be applied to a device for obtaining evaluation parameters for a line earthquake early warning system, located in an electronic device such as a terminal device or server. This device can be implemented using software, hardware, or a combination of both.

[0032] Figure 1 FIG. 1 is a flow chart of a method for obtaining evaluation parameters of a line earthquake early warning system according to an embodiment of the present invention. Figure 1 As shown, the method includes the following steps 101 to 106.

[0033] Step 101: Obtain epicenter location parameters and line location parameters.

[0034] Step 102: Determine the start time and end time of the impact of the earthquake S wave on the line, and the affected position mileage parameters of the line at each time between the start time and the end time, based on the epicenter location parameters, the line location parameters, and the propagation rate of the S wave.

[0035] Step 103: In the line mileage-time coordinate system, determine the first integral area of the affected line position mileage parameter from the start time of the impact to the end time of the impact.

[0036] Step 104: Obtain the warning time and warning section of the line earthquake warning system, wherein the line earthquake warning system refers to an earthquake warning system used for warning of earthquake impacts on the line.

[0037] Step 105 : In the route mileage-time coordinate system, determine a second integral area of the route warning route section from the warning time to the impact end time.

[0038] Step 106: Determine an early warning effect evaluation parameter of the line earthquake early warning system according to the overlapping ratio of the first integral area and the second integral area.

[0039] The embodiment of the present invention evaluates the warning effect of the line earthquake early warning system by comparing the size of the overlapping part of "the area of the line covered by the actual earthquake S wave" and "the area of the line covered by the early warning result" in the time dimension, which solves the problem of not being able to simultaneously evaluate the accuracy and timeliness of the line earthquake early warning, and is conducive to objectively evaluating the actual effect of the line earthquake early warning system after the earthquake.

[0040] In an exemplary embodiment, the determination of the affected parameters of each line in step 102 is as follows.

[0041] (1) See Figure 2 The time when the line is affected by the earthquake S wave can be determined by following steps 201 to 204.

[0042] Step 201: Construct a line location distribution curve according to the line location parameters.

[0043] Step 202: Determine a circular curve that is tangent to the line position distribution curve; the circular curve has the epicenter position as the center.

[0044] Step 203: Determine the radius of the circular curve.

[0045] Step 204: Determine the start time of the line being affected by the earthquake S wave based on the propagation speed of the S wave and the radius of the circular curve.

[0046] (2) See Figure 3 The time when the line is affected by the earthquake S wave ends can be determined by following steps 301 to 302.

[0047] Step 301: Determine the propagation time corresponding to when the S-wave intensity decays to a set value.

[0048] Step 302: Determine the end time of the influence of the earthquake S wave on the line according to the propagation time and the start time of the influence.

[0049] (3) See Figure 4 The affected position mileage parameters of the line at each time between the impact start time and the impact end time can be determined by following steps 401 to 402.

[0050] Step 401: Construct a line location distribution curve according to the line location parameters.

[0051] Step 402: Determine a circular curve corresponding to each moment between the impact start moment and the impact end moment according to the S-wave propagation velocity; the circular curve has the epicenter position as the center and the S-wave propagation distance at the corresponding moment as the radius.

[0052] Step 403: Determine the affected position mileage parameters of the line at each moment between the impact start time and the impact end time based on the intersection of the circular curve corresponding to each moment between the impact start time and the impact end time and the line position distribution curve.

[0053] It should be noted that the location mileage parameter refers to the mileage data of the intersection location.

[0054] The following describes the principles for determining the affected parameters of the above-mentioned lines.

[0055] During an earthquake, the S-wave expands outward from the epicenter, O, at a constant rate of 3.5 km / s. The moment it reaches tangency with the transmission lines, it begins to affect them. As the S-wave propagates farther, its impact on the ground weakens. Once it weakens sufficiently, it ceases to affect the transmission lines. Figure 5 The schematic diagram of the earthquake S wave amplification process is shown as an example. Figure 5 As shown in Figure 2, earthquake S waves propagate from the epicenter to the surrounding areas. Figure 5 The circles (also called S-wave circles) represent the locations to which the earthquake S-wave propagated at different times. In Circle I, the earthquake S-wave had not yet affected the line. The circle then continued to expand at a speed of 3.5 km / s (S-wave velocity) along the radius. As the circle expanded to Circle II, it began to affect the line. The point A where Circle II intersected the line was the first point affected by the earthquake S-wave. The circle continued to expand, with two intersections. By the time it expanded to Circle III, the S-wave had decayed to the point where it no longer affected the line. The moment of the earthquake S-wave propagation corresponding to Circle II is the impact start time described in this embodiment, and the moment of the earthquake S-wave propagation corresponding to Circle III is the impact end time described in this embodiment.

[0056] Since the S-wave velocity is constant, the propagation time T of the S-wave from the moment of earthquake occurrence to circle III can be calculated. Based on this propagation time T, the end time of the impact described in this embodiment can be determined. For example, if the time when the S-wave starts to propagate from the epicenter is used as the starting point of the timing ( t =0), t 始 Indicates the moment of impact onset (circle II), t 终 Indicates the end time of the impact (circle III). T = t 终 The time the line is affected can be obtained T’ = T - t 始 , which is equal to the time it takes for the S wave to propagate from circle II to circle III.

[0057] Between the start and end of the impact, the radius of each circle at each moment can be calculated based on the transmission rate of the earthquake S wave. Based on the radius, a circle is drawn with the epicenter as the center to obtain the intersection of the circle and the line. After obtaining the intersection, the mileage data corresponding to the intersection can be obtained, thus obtaining the position mileage parameters of the line affected at each moment between the start and end of the impact as described above in this embodiment.

[0058] It should be noted that Figure 5 The section between AB in the middle only affects the mileage on one side (the right side), and the left side is symmetrical with the right side. This embodiment only takes the right side as an example to introduce the embodiment scheme.

[0059] In an example embodiment, step 103 determines a first integral area of the affected position of the route from the impact start time to the impact end time in a route mileage-time coordinate system. The specific implementation method may be as follows.

[0060] Line mileage-time coordinate system: Line mileage ( K mileage, k ) as the horizontal axis and the impact time (t) as the vertical axis to establish a coordinate system. The moment in circle II is defined as the initial moment, that is, point A is the moment t=0, and the moment when it changes to circle III is defined as T'. We can get t ∈[0, T’ ] t ( k ), so we can get the following function relationship: Figure 6 The closed area enclosed by CDE ( Kt area), is the first integration area.

[0061] In an example embodiment, step 105 determines a second integral area of the route warning route section from the warning moment to the impact end moment in a route mileage-time coordinate system. The specific implementation method may be as follows.

[0062] The coordinate system of line mileage-time is the same as that in the previous embodiment. The second integration area is Figure 7 The area enclosed by the rectangle FGHI in the figure is the area of the line earthquake early warning algorithm (system). The FG segment is the warning line segment of the line earthquake early warning algorithm (system), and the FI time period is the time period from the start of the warning to the end of the line impact. It should be noted that the start of the warning is usually earlier than the start of the line impact.

[0063] In one example embodiment, step 106 determines a warning effect evaluation parameter for the line earthquake early warning system based on the overlap ratio between the first integral area and the second integral area. Specifically, the warning effect evaluation parameter for the line earthquake early warning system can be determined based on the principle that the greater the overlap ratio between the first integral area and the second integral area, the greater the warning effect evaluation parameter. A higher degree of overlap within the same section indicates a better comprehensive evaluation of the accuracy and timeliness of the warning; a lower degree of overlap indicates a worse comprehensive evaluation; and if there is no overlap at all, it indicates that the warning result has completely failed to protect the corresponding line section.

[0064] See Figure 7The first integral region, that is, the closed area surrounded by CDE, represents the actual impact of earthquake S waves on the line. Figure 7 The second integral region, that is, the closed area surrounded by FGHI ( K'-t' Area), representing the comprehensive protection of the line by the earthquake early warning system. Figure 7 The closed area enclosed by CDJI represents the area that is not protected due to the deviation of the warning effect (accuracy, timeliness), the closed area enclosed by JEI represents the protected area, the closed area enclosed by FJEK represents the additional protection area brought by the early warning to the S-wave affected section, and the closed area enclosed by EKGH represents the area that is not needed but is actually affected by the warning.

[0065] Taking railways as an example, during early warning response, as soon as the algorithm issues a warning, necessary measures are taken to brake the train in the affected section. Therefore, for the enclosed area encompassed by CDJI, the train is unprotected. The smaller this area, the better the warning effect. For the enclosed area encompassed by FJEK, this section is the actual area affected by the earthquake. The earlier the warning is issued, the more time there is to avoid danger and the better the protection. In other words, the larger this area, the better the warning effect. For the enclosed area encompassed by EKGH, this section does not require protection, but the warning is actually issued, disrupting the original train operation. Similarly, the smaller this area, the better the warning effect. Therefore, by comprehensively calculating the overlapping area of Kt and K'-t', the comprehensive effectiveness of line earthquake early warning can be evaluated.

[0066] The following is an introduction to the calculation of the "mileage-time" (Kt) area mentioned above.

[0067] (1) Obtain the affected position mileage parameters of the line at each time between the start time and the end time of the impact.

[0068] 1) Let the equation of the S wave circle be Let the coordinates of the epicenter be ,initial t At time 0, the equation of the circle is is the center of the circle and the initial radius is , the circle is tangent to the line curve at x Axis. Radius over time The rate of change is per second , then at time , the radius of the circle: ; The equation of a circle is: Because in When the circle is tangent to the curve Axis, at this time , substituting into the circle equation we get: The solution is , that is, the tangent point is .

[0069] 2) Assume the line curve equation Let the curve equation be , its curvature is a fixed value.

[0070] The curvature formula is: .

[0071] Will Substitute into the circle equation , solve : 3) Classification discussion ① Case 1: Straight line case (curvature ) If the curve is a straight line, let the equation of the line be .because When the circle is tangent to the line ,but , , the equation of the line is .

[0072] Will Substitute into the circle equation make ,but .

[0073] For quadratic equations: ( , , ), Its solution is .

[0074] Take the intersection point on the right side, that is, take the positive sign.

[0075] Solve first about The expression: Depend on , Available .

[0076] calculate and 、 Enclosed area : in When The right intersection Coordinates, by Solution .

[0077] ② Case 2: Arc case (curvature , is the arc radius).

[0078] Let the arc equation be .because When the circle and the arc are tangent at According to the properties of the tangency of two circles, we can get some information about , , , , relationship.

[0079] Will Substitute into the circle equation : Expand and simplify, then solve about Expression Similarly, calculate and 、 Enclosed area : in When The right intersection Coordinates, given by: Solve the arc equation simultaneously .

[0080] It should be noted that the curvature can be determined according to the actual curvature of the line. Specifically, the line can be regarded as a line composed of multiple curvature sections according to actual conditions.

[0081] 4) Determining the "mileage-time" (Kt) integration area (first integration area) The expression: In general, ,in is the equation of the curve.

[0082] Area function: yes The right intersection Coordinates, solved by solving the equation of the circle and the equation of the curve simultaneously.

[0083] Different curve types (straight lines, arcs, etc.) require specific analysis of the curve equation and substitution into the calculation.

[0084] (2) Obtain the K'-t' region (i.e., the second integral region) of the warning parameter The K'-t' area of the warning parameter is a rectangular area formed by the warning line section and the warning time section, wherein the warning time section is the time period from the warning moment to the impact end moment.

[0085] (3) Find the parts where Kt and K'-t' intersect Based on the geometric relationship, the area of the overlapping region between the first integral region and the rectangular region of the second integral region is calculated according to the area function of the first integral region and the rectangular region of the second integral region.

[0086] The embodiment of the present invention solves the problem of not being able to simultaneously evaluate the accuracy and timeliness of line earthquake early warning by establishing the joint area of the two quantities "mileage K" and "time t", which is conducive to quickly and objectively evaluating the actual effect of the line earthquake early warning protection line after the earthquake.

[0087] The following describes the line earthquake early warning system evaluation parameter acquisition device provided by the present invention. The line earthquake early warning system evaluation parameter acquisition device described below and the line earthquake early warning system evaluation parameter acquisition method described above can refer to each other.

[0088] See also Figure 8 , the evaluation parameter acquisition device of the line earthquake early warning system includes the following modules.

[0089] The first parameter acquisition module 501 is used to acquire epicenter position parameters and line position parameters.

[0090] The line affected parameter determination module 502 is used to determine the start time and end time of the impact of the earthquake S wave on the line, as well as the affected position mileage parameters of the line at each time between the start time and the end time of the impact, based on the epicenter location parameters, the line location parameters, and the propagation rate of the S wave.

[0091] The first integration region determination module 503 is configured to determine, in a route mileage-time coordinate system, a first integration region of the affected position mileage parameters of the route from the start time of the impact to the end time of the impact.

[0092] The second parameter acquisition module 504 is used to obtain the warning time of the line earthquake early warning system and the line warning section.

[0093] The second integration region determining module 505 is configured to determine, in a route mileage-time coordinate system, a second integration region of the route warning route section from the warning moment to the impact end moment.

[0094] The early warning effect evaluation parameter determination module 506 is used to determine the early warning effect evaluation parameter of the line earthquake early warning system according to the overlap ratio of the first integral area and the second integral area.

[0095] Figure 9 An example of a physical structure diagram of an electronic device is shown below. Figure 9 As shown, the electronic device may include: a processor 610 , a communications interface 620 , a memory 630 and a communication bus 640 , wherein the processor 610 , the communications interface 620 and the memory 630 communicate with each other via the communication bus 640 . The processor 610 can call the logic instructions in the memory 630 to execute the method for obtaining evaluation parameters of the line earthquake early warning system, which includes: obtaining epicenter position parameters and line position parameters; determining the start time and end time of the impact of the earthquake S wave on the line and the affected position mileage parameters of the line at each time between the start time and the end time of the impact based on the epicenter position parameters, the line position parameters and the propagation rate of the S wave; determining the first integral area of the affected position mileage parameters of the line from the start time to the end time of the impact in the line mileage-time coordinate system; obtaining the warning time and line warning section of the line earthquake early warning system; determining the second integral area of the line warning line section from the warning time to the end time of the impact in the line mileage-time coordinate system; determining the warning effect evaluation parameters of the line earthquake early warning system based on the overlapping ratio of the first integral area and the second integral area.

[0096] Furthermore, the logic instructions in the aforementioned memory 630 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0097] On the other hand, the present invention also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the method for obtaining evaluation parameters of the line earthquake early warning system provided by the above methods, the method including: obtaining epicenter position parameters and line position parameters; determining the start time and end time of the impact of the earthquake S wave on the line and the affected position mileage parameters of the line at each time between the start time and the end time of the impact based on the epicenter position parameters, the line position parameters and the propagation rate of the S wave; determining in the line mileage-time coordinate system, a first integral area of the affected position mileage parameters of the line from the start time to the end time of the impact; obtaining the warning time and line warning section of the line earthquake early warning system; determining in the line mileage-time coordinate system, a second integral area of the line warning line section from the warning time to the end time of the impact; determining the warning effect evaluation parameters of the line earthquake early warning system based on the overlap ratio of the first integral area and the second integral area.

[0098] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a method for obtaining evaluation parameters of a line earthquake early warning system provided by the above-mentioned methods, the method comprising: obtaining epicenter position parameters and line position parameters; determining the start time and end time of the impact of the earthquake S wave on the line and the affected position mileage parameters of the line at each time between the start time and the end time of the impact based on the epicenter position parameters, the line position parameters and the propagation rate of the S wave; determining a first integral area of the affected position mileage parameters of the line from the start time to the end time of the impact in a line mileage-time coordinate system; obtaining the warning time and line warning section of the line earthquake early warning system; determining a second integral area of the line warning section from the warning time to the end time of the impact in a line mileage-time coordinate system; determining the warning effect evaluation parameters of the line earthquake early warning system based on the overlapping ratio of the first integral area and the second integral area.

[0099] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0100] Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented using software plus a necessary general-purpose hardware platform, or of course, hardware. Based on this understanding, the essence of the above technical solution, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in each embodiment or certain portions of the embodiments.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for obtaining evaluation parameters of a line earthquake early warning system, characterized in that: include: Obtain epicenter location parameters and line location parameters; Determine the start time and end time of the impact of the earthquake S wave on the line and the affected position mileage parameters of the line at each time between the start time and the end time according to the epicenter location parameters, the line location parameters and the propagation rate of the S wave; In the route mileage-time coordinate system, determining a first integral area of the affected position mileage parameter of the route from the start time of the impact to the end time of the impact; Obtain the warning time and warning section of the line earthquake early warning system; In a route mileage-time coordinate system, determining a second integral area of the route warning route section from the warning time to the impact end time; An early warning effect evaluation parameter of the line earthquake early warning system is determined according to an overlapping ratio between the first integral area and the second integral area.

2. The method for obtaining evaluation parameters of a line earthquake early warning system according to claim 1, characterized in that: Based on the epicenter location parameters, line location parameters, and S-wave propagation velocity, determine the time when the earthquake S-wave begins to affect the line, including: constructing a line location distribution curve according to the line location parameters; Determine a circular curve tangent to the line position distribution curve; the circular curve has the epicenter position as the center; determining a radius of the circular curve; The impact start time of the line being affected by the earthquake S wave is determined based on the propagation speed of the S wave and the radius of the circular curve.

3. The method for obtaining evaluation parameters of a line earthquake early warning system according to claim 2, characterized in that: Also includes: Determine the propagation time corresponding to when the S-wave intensity decays to the set value; The time when the line is affected by the earthquake S wave is determined based on the propagation time and the time when the influence starts.

4. The method for obtaining evaluation parameters of a line earthquake early warning system according to claim 1, characterized in that: Determining the affected position mileage parameters of the line at each time between the start time of the impact and the end time of the impact based on the epicenter position parameters, the line position parameters, and the propagation velocity of the S wave, including: constructing a line location distribution curve according to the line location parameters; Determining a circular curve corresponding to each time between the start time of the impact and the end time of the impact according to the propagation rate of the S wave; the circular curve has the epicenter position as the circle center and the propagation distance of the S wave at the corresponding time as the radius; The affected position mileage parameters of the line at each moment between the start time of the impact and the end time of the impact are determined based on the intersection of the circular curve corresponding to each moment between the start time of the impact and the end time of the impact and the line position distribution curve.

5. The method for obtaining evaluation parameters of a line earthquake early warning system according to claim 2 or 4, characterized in that: Constructing a line location distribution curve according to the line location parameters, including: The line position parameters are fitted using a curve equation to obtain a line position distribution curve.

6. The method for obtaining evaluation parameters of a line earthquake early warning system according to claim 5, characterized in that: The curve equation includes a straight line equation and an arc equation.

7. The method for obtaining evaluation parameters of a line earthquake early warning system according to any one of claims 1 to 6, characterized in that: Determining an early warning effect evaluation parameter of the line earthquake early warning system according to an overlap ratio between the first integral area and the second integral area includes: Based on the principle that the greater the overlap ratio between the first integral area and the second integral area, the greater the early warning effect evaluation parameter, the early warning effect evaluation parameter of the line earthquake early warning system is determined.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the program, the method for obtaining evaluation parameters of the line earthquake early warning system as described in any one of claims 1 to 7 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for obtaining evaluation parameters of a line earthquake early warning system as described in any one of claims 1 to 7 is implemented.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the method for obtaining evaluation parameters of a line earthquake early warning system as described in any one of claims 1 to 7 is implemented.

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