A simulation test method and monitoring system for coal mine main ventilation fan

Abstract

The present invention relates to a simulation test method and monitoring system for a main ventilation fan in a coal mine. The method comprises obtaining a first image of the fan blades of the main ventilation fan in a coal mine; adjusting the shooting time of the second image according to the clarity of the first image; obtaining a second image of the fan blades of the main ventilation fan in a coal mine; using the second image to draw a displacement fluctuation curve of the fan blades of the main ventilation fan in a coal mine; obtaining the dynamic bending parameters of the rotating shaft of the main ventilation fan in a coal mine and using the dynamic bending parameters of the rotating shaft to draw a bending fluctuation curve of the rotating shaft and associating the displacement fluctuation curve with the bending fluctuation curve and marking the surge location area of ​​the main ventilation fan in a coal mine on the bending fluctuation curve. The simulation test method and monitoring system for the main ventilation fan in a coal mine disclosed in the present invention determine the triggering conditions or early indications of surge by analyzing the fan blades and rotating shaft of the main ventilation fan in a coal mine, thereby providing a reference basis for the detection and analysis of the main ventilation fan in a coal mine during use.

Description

Technical Field

[0001] The present invention relates to the technical field of simulation testing, and in particular to a simulation testing method and a monitoring system for a main ventilation fan in a coal mine. Background Art

[0002] The main ventilation fan in a coal mine is responsible for the ventilation of the entire mine, a wing of a mine or a larger mining area. It is a machine that needs to run continuously all year round, and the electricity it consumes accounts for about 20%-30% of the total electricity consumption of the mine.

[0003] The testing of main ventilation fans in coal mines mainly includes static performance test, dynamic performance test, air volume test and energy consumption test. Among them, the static performance test, dynamic performance test and energy consumption test are relatively easy to implement, while the dynamic performance test is relatively difficult to implement.

[0004] For example, the surge test during the dynamic performance test is aimed at discovering the triggering conditions or early indicators of surge. Since the main ventilation fan in a coal mine is a large machine, it is difficult to deploy sensors. For example, wind speed sensors and flow sensors are mostly deployed on the outer shell wall, and data in the central area cannot be collected, which leads to errors and lags in judgment. Summary of the Invention

[0005] The present invention provides a simulation test method and monitoring system for a main ventilation fan in a coal mine. By analyzing the blades and rotating shaft of the main ventilation fan in a coal mine, the triggering conditions or early indications of surge are determined, thereby providing a reference basis for the detection and analysis of the main ventilation fan in the coal mine during use.

[0006] The above-mentioned object of the present invention is achieved through the following technical solutions:

[0007] In a first aspect, the present invention provides a simulation test method for a main ventilation fan in a coal mine, comprising:

[0008] Acquire a first image of a fan blade of a main ventilation fan of a coal mine, where a plane of the first image is perpendicular to an axis direction of the main ventilation fan of the coal mine, and the number of the first images is multiple;

[0009] adjusting the shooting time of the second image according to the clarity of the first image;

[0010] Acquire a second image of the fan blades of the main ventilation fan of the coal mine, where the plane of the second image is parallel to the axis direction of the main ventilation fan of the coal mine;

[0011] Using the second image, a displacement fluctuation curve of a fan blade of a main ventilation fan in a coal mine is drawn;

[0012] Obtain the dynamic bending parameters of the shaft of the main ventilation fan in the coal mine and use the dynamic bending parameters to draw the bending fluctuation curve of the shaft;

[0013] The displacement fluctuation curve and the bending fluctuation curve are correlated and the surge location area of ​​the main ventilation fan of the coal mine is marked on the bending fluctuation curve.

[0014] In a possible implementation of the first aspect, adjusting the capture time of the second image according to the clarity of the first image includes:

[0015] Draw a reference baseline based on the rotation path of the coal mine main ventilation fan blades;

[0016] Use the pixels on the reference baseline to draw the analysis curve;

[0017] Determine the peak point on the analysis curve, the number of peak points is one or more;

[0018] When the number of peak points is two, the shooting time of the second image is adjusted to reduce the number of peak points to one or two. When the number of peak points is two, the distance between the two peak points is less than or equal to the set distance value.

[0019] In a possible implementation of the first aspect, determining the peak point on the analysis curve includes:

[0020] Determine the sudden change area on the analysis curve, the number of sudden change areas is two or three;

[0021] The sudden change area on the analysis curve is processed using wavelet transform to obtain multiple sub-analysis curves, each of which has a starting point and an end point;

[0022] Determining the starting position of the peak point according to the starting position point and the ending position point of the sub-analysis curve, wherein the starting position point and the ending position point of the sub-analysis curve do not coincide with the end point of the analysis curve;

[0023] The first and last starting positions are taken as the peak points on the analysis curve.

[0024] In a possible implementation manner of the first aspect, determining the starting position of the peak point according to the starting position point and the ending position point of the sub-analysis curve includes:

[0025] Determine the collection area of ​​the starting position points of the sub-analysis curve and the collection area of ​​the ending position points of the sub-analysis curve;

[0026] The coordinates of the position points in the collection area are averaged to obtain the starting position of the peak point. The position points in the collection area include the starting position point and the ending position point of the sub-analysis curve.

[0027] In a possible implementation of the first aspect, using the second image to draw a displacement fluctuation curve of a blade of a main ventilation fan in a coal mine includes:

[0028] determining an outline of a coal mine main ventilation fan blade and a color baseline of the coal mine main ventilation fan blade on the second image;

[0029] Calculate the position offset between the color baseline and the outline;

[0030] Use position offset to draw the displacement fluctuation curve of the fan blades of the main ventilation fan in a coal mine.

[0031] In a possible implementation of the first aspect, determining the outline of the coal mine main ventilation fan blade and the color baseline of the coal mine main ventilation fan blade on the second image further includes:

[0032] Establish multiple analysis baselines perpendicular to the rotation direction of the coal mine main ventilation fan blades;

[0033] Create a difference series or a quadratic difference series using the pixels on the analysis baseline;

[0034] Determine the outline points of the coal mine main ventilation fan blades and the color baseline points of the coal mine main ventilation fan blades according to the difference series or the quadratic difference series;

[0035] Use the contour points of the coal mine main ventilation fan blades and the color baseline points of the coal mine main ventilation fan blades to create an analysis baseline segment;

[0036] The analysis baseline segment is rotated based on the color baseline point of the fan blade of the main ventilation fan of the coal mine to minimize the length of the analysis baseline segment;

[0037] Calculate the length ratios of the blades of the main ventilation fan in coal mines on both sides of the color baseline point and calculate the average of multiple length ratios.

[0038] In a possible implementation of the first aspect, associating the displacement fluctuation curve with the curved fluctuation curve and marking a surge occurrence location area of ​​the coal mine main ventilation fan on the curved fluctuation curve includes:

[0039] Correlate displacement fluctuation curves with surge events;

[0040] Determining a correlation region on the displacement fluctuation curve according to the correlated surge event, wherein a time period corresponding to the correlation region is before a time period corresponding to the surge event;

[0041] The time period corresponding to the associated area is marked on the curved fluctuation curve.

[0042] In a second aspect, the present invention provides a simulation test device for a main ventilation fan in a coal mine, comprising:

[0043] A first acquisition unit is configured to acquire a first image of a fan blade of a main ventilation fan of a coal mine, wherein a plane where the first image is located is perpendicular to an axis direction of the main ventilation fan of the coal mine, and the number of the first images is multiple;

[0044] a first adjusting unit, configured to adjust a shooting time of the second image according to the clarity of the first image;

[0045] A second acquisition unit is used to acquire a second image of the fan blades of the main ventilation fan of the coal mine, where the plane where the second image is located is parallel to the axis direction of the main ventilation fan of the coal mine;

[0046] A first drawing unit is configured to draw a displacement fluctuation curve of a fan blade of a main ventilation fan in a coal mine using the second image;

[0047] The second drawing unit is used to obtain the dynamic bending parameters of the shaft of the main ventilation fan of the coal mine and draw the bending fluctuation curve of the shaft using the dynamic bending parameters of the shaft;

[0048] The correlation processing unit is used to correlate the displacement fluctuation curve and the bending fluctuation curve and mark the surge location area of ​​the coal mine main ventilation fan on the bending fluctuation curve.

[0049] In a third aspect, the present invention provides a monitoring system for a main ventilation fan in a coal mine, the system comprising:

[0050] one or more memories for storing instructions; and

[0051] One or more processors, configured to call and execute the instructions from the memory to perform the method as described in the first aspect and any possible implementation of the first aspect.

[0052] In a fourth aspect, the present invention provides a computer-readable storage medium, the computer-readable storage medium comprising:

[0053] The program, when the program is executed by a processor, the method described in the first aspect and any possible implementation of the first aspect is executed.

[0054] In a fifth aspect, the present invention provides a computer program product comprising program instructions. When the program instructions are executed by a computing device, the method described in the first aspect and any possible implementation of the first aspect is executed.

[0055] In a sixth aspect, the present invention provides a chip system comprising a processor for implementing the functions involved in the above aspects, such as generating, receiving, sending, or processing the data and / or information involved in the above methods.

[0056] The chip system may be composed of chips, or may include chips and other discrete devices.

[0057] In one possible design, the chip system also includes a memory for storing necessary program instructions and data. The processor and the memory can be decoupled and provided on different devices, connected via wired or wireless means, or the processor and the memory can be coupled on the same device. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 The present invention provides a schematic flow chart of the steps of a simulation test method for a main ventilation fan in a coal mine.

[0059] Figure 2 This is a schematic block diagram of the steps of adjusting the shooting time of the second image according to the clarity of the first image provided by the present invention.

[0060] Figure 3 This is a schematic block diagram of the steps for determining a peak point on an analysis curve provided by the present invention. DETAILED DESCRIPTION

[0061] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings.

[0062] The present invention discloses a simulation test method for a main ventilation fan in a coal mine. Figure 1 In some examples, the simulation test method of the main ventilation fan of a coal mine disclosed in the present invention includes the following steps:

[0063] S101, acquiring a first image of a fan blade of a main ventilation fan in a coal mine, where a plane of the first image is perpendicular to an axis direction of the main ventilation fan in the coal mine, and a plurality of first images are acquired;

[0064] S102, adjusting the shooting time of the second image according to the clarity of the first image;

[0065] S103, acquiring a second image of the blades of the main ventilation fan of the coal mine, where the plane of the second image is parallel to the axis direction of the main ventilation fan of the coal mine;

[0066] S104, using the second image to draw a displacement fluctuation curve of the fan blades of the main ventilation fan of the coal mine;

[0067] S105, obtaining dynamic bending parameters of a rotating shaft of a main ventilation fan in a coal mine and drawing a bending fluctuation curve of the rotating shaft using the dynamic bending parameters of the rotating shaft;

[0068] S106 , associating the displacement fluctuation curve with the bending fluctuation curve and marking a surge occurrence location area of ​​the main ventilation fan of the coal mine on the bending fluctuation curve.

[0069] For some examples, see Figure 2 , adjusting the shooting time of the second image according to the clarity of the first image includes:

[0070] S201, drawing a reference baseline according to the rotation path of the fan blades of the main ventilation fan of the coal mine;

[0071] S202, drawing an analysis curve using pixel points on the reference baseline;

[0072] S203, determining peak points on the analysis curve, where the number of peak points is one or more;

[0073] S204 , when the number of peak points is two, adjusting the shooting time of the second image so that the number of peak points is reduced to one or two, and when the number of peak points is two, the distance between the two peak points is less than or equal to the set distance value.

[0074] For some examples, see Figure 3 , determine the peak point on the analysis curve including:

[0075] S301, determining abrupt change regions on the analysis curve, where the number of abrupt change regions is two or three;

[0076] S302, using wavelet transform to process the sudden change region on the analysis curve to obtain multiple sub-analysis curves, each of which has a starting position point and an end position point;

[0077] S303, determining the starting position of the peak point according to the starting position point and the ending position point of the sub-analysis curve, where the starting position point and the ending position point of the sub-analysis curve do not coincide with the end point of the analysis curve;

[0078] S304: The first starting position and the last starting position are used as peak points on the analysis curve.

[0079] In some examples, determining the starting position of the peak point based on the starting position point and the ending position point of the sub-analysis curve includes:

[0080] Determine the collection area of ​​the starting position points of the sub-analysis curve and the collection area of ​​the ending position points of the sub-analysis curve;

[0081] The coordinates of the position points in the collection area are averaged to obtain the starting position of the peak point. The position points in the collection area include the starting position point and the ending position point of the sub-analysis curve.

[0082] In some examples, using the second image to draw a displacement fluctuation curve of a fan blade of a main ventilation fan in a coal mine includes:

[0083] determining an outline of a coal mine main ventilation fan blade and a color baseline of the coal mine main ventilation fan blade on the second image;

[0084] Calculate the position offset between the color baseline and the outline;

[0085] Use position offset to draw the displacement fluctuation curve of the fan blades of the main ventilation fan in a coal mine.

[0086] In some examples, determining the outline of the coal mine main ventilation fan blade and the color baseline of the coal mine main ventilation fan blade in the second image further includes:

[0087] Establish multiple analysis baselines perpendicular to the rotation direction of the coal mine main ventilation fan blades;

[0088] Create a difference series or a quadratic difference series using the pixels on the analysis baseline;

[0089] Determine the outline points of the coal mine main ventilation fan blades and the color baseline points of the coal mine main ventilation fan blades according to the difference series or the quadratic difference series;

[0090] Use the contour points of the coal mine main ventilation fan blades and the color baseline points of the coal mine main ventilation fan blades to create an analysis baseline segment;

[0091] The analysis baseline segment is rotated based on the color baseline point of the fan blade of the main ventilation fan of the coal mine to minimize the length of the analysis baseline segment;

[0092] Calculate the length ratios of the blades of the main ventilation fan in coal mines on both sides of the color baseline point and calculate the average of multiple length ratios.

[0093] In some examples, correlating the displacement fluctuation curve with the bending fluctuation curve and marking the surge occurrence location of the main ventilation fan of the coal mine on the bending fluctuation curve includes:

[0094] Correlate displacement fluctuation curves with surge events;

[0095] Determining a correlation region on the displacement fluctuation curve according to the correlated surge event, wherein a time period corresponding to the correlation region is before a time period corresponding to the surge event;

[0096] The time period corresponding to the associated area is marked on the curved fluctuation curve.

[0097] The present invention also provides a simulation test device for a main ventilation fan in a coal mine, comprising:

[0098] A first acquisition unit is configured to acquire a first image of a fan blade of a main ventilation fan of a coal mine, wherein a plane where the first image is located is perpendicular to an axis direction of the main ventilation fan of the coal mine, and the number of the first images is multiple;

[0099] a first adjusting unit, configured to adjust a shooting time of the second image according to the clarity of the first image;

[0100] A second acquisition unit is used to acquire a second image of the fan blades of the main ventilation fan of the coal mine, where the plane where the second image is located is parallel to the axis direction of the main ventilation fan of the coal mine;

[0101] a first drawing unit, configured to draw a displacement fluctuation curve of a fan blade of a main ventilation fan in a coal mine using the second image;

[0102] The second drawing unit is used to obtain the dynamic bending parameters of the shaft of the main ventilation fan of the coal mine and draw the bending fluctuation curve of the shaft using the dynamic bending parameters of the shaft;

[0103] The correlation processing unit is used to correlate the displacement fluctuation curve and the bending fluctuation curve and mark the surge location area of ​​the coal mine main ventilation fan on the bending fluctuation curve.

[0104] In a possible implementation of the first aspect, adjusting the capture time of the second image according to the clarity of the first image includes:

[0105] Draw a reference baseline based on the rotation path of the coal mine main ventilation fan blades;

[0106] Use the pixels on the reference baseline to draw the analysis curve;

[0107] Determine the peak point on the analysis curve, the number of peak points is one or more;

[0108] When the number of peak points is two, the shooting time of the second image is adjusted to reduce the number of peak points to one or two. When the number of peak points is two, the distance between the two peak points is less than or equal to the set distance value.

[0109] In a possible implementation of the first aspect, determining the peak point on the analysis curve includes:

[0110] Determine the sudden change area on the analysis curve, the number of sudden change areas is two or three;

[0111] The sudden change area on the analysis curve is processed using wavelet transform to obtain multiple sub-analysis curves, each of which has a starting point and an end point;

[0112] Determining the starting position of the peak point according to the starting position point and the ending position point of the sub-analysis curve, wherein the starting position point and the ending position point of the sub-analysis curve do not coincide with the end point of the analysis curve;

[0113] The first and last starting positions are taken as the peak points on the analysis curve.

[0114] In a possible implementation manner of the first aspect, determining the starting position of the peak point according to the starting position point and the ending position point of the sub-analysis curve includes:

[0115] Determine the collection area of ​​the starting position points of the sub-analysis curve and the collection area of ​​the ending position points of the sub-analysis curve;

[0116] The coordinates of the position points in the collection area are averaged to obtain the starting position of the peak point. The position points in the collection area include the starting position point and the ending position point of the sub-analysis curve.

[0117] In a possible implementation of the first aspect, using the second image to draw a displacement fluctuation curve of a blade of a main ventilation fan in a coal mine includes:

[0118] determining an outline of a coal mine main ventilation fan blade and a color baseline of the coal mine main ventilation fan blade on the second image;

[0119] Calculate the position offset between the color baseline and the outline;

[0120] Use position offset to draw the displacement fluctuation curve of the fan blades of the main ventilation fan in a coal mine.

[0121] In a possible implementation of the first aspect, determining the outline of the coal mine main ventilation fan blade and the color baseline of the coal mine main ventilation fan blade on the second image further includes:

[0122] Establish multiple analysis baselines perpendicular to the rotation direction of the coal mine main ventilation fan blades;

[0123] Create a difference series or a quadratic difference series using the pixels on the analysis baseline;

[0124] Determine the outline points of the coal mine main ventilation fan blades and the color baseline points of the coal mine main ventilation fan blades according to the difference series or the quadratic difference series;

[0125] Use the contour points of the coal mine main ventilation fan blades and the color baseline points of the coal mine main ventilation fan blades to create an analysis baseline segment;

[0126] The analysis baseline segment is rotated based on the color baseline point of the fan blade of the main ventilation fan of the coal mine to minimize the length of the analysis baseline segment;

[0127] Calculate the length ratios of the blades of the main ventilation fan in coal mines on both sides of the color baseline point and calculate the average of multiple length ratios.

[0128] In a possible implementation of the first aspect, associating the displacement fluctuation curve with the curved fluctuation curve and marking a surge occurrence location area of ​​the coal mine main ventilation fan on the curved fluctuation curve includes:

[0129] Correlate displacement fluctuation curves with surge events;

[0130] Determining a correlation region on the displacement fluctuation curve according to the correlated surge event, wherein a time period corresponding to the correlation region is before a time period corresponding to the surge event;

[0131] The time period corresponding to the associated area is marked on the curved fluctuation curve.

[0132] In one example, the unit in any of the above devices can be one or more integrated circuits configured to implement the above method, such as: one or more application specific integrated circuits (ASICs), or, one or more digital signal processors (DSPs), or, one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms.

[0133] For another example, when the units in the device can be implemented in the form of a processing element scheduling program, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call programs. For another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0134] Various objects such as various messages / information / equipment / network elements / systems / devices / actions / operations / processes / concepts that may appear in the present invention are named. It can be understood that these specific names do not constitute a limitation on the relevant objects. The names assigned may change with factors such as scenarios, contexts or usage habits. The understanding of the technical meaning of the technical terms in the present invention should be mainly determined from the functions and technical effects embodied / executed in the technical solutions.

[0135] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0136] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0137] 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, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0138] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0139] It should also be understood that in various embodiments of the present invention, the terms "first," "second," and so on are merely used to indicate that multiple objects are distinct. For example, the first time window and the second time window are merely used to indicate different time windows. These terms should not affect the time windows themselves, and the terms "first," "second," and so on should not limit the embodiments of the present invention in any way.

[0140] It should also be understood that in the various embodiments of the present invention, unless otherwise specified or there is any logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0141] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a computer-readable storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned computer-readable storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0142] The present invention also provides a monitoring system for a main ventilation fan in a coal mine, the system comprising:

[0143] one or more memories for storing instructions; and

[0144] One or more processors are used to call and execute the instructions from the memory to perform the method as described above.

[0145] The present invention also provides a computer program product, which includes instructions. When the instructions are executed, the terminal device and the network device perform operations of the terminal device and the network device corresponding to the above method.

[0146] The present invention also provides a chip system, which includes a processor for implementing the functions involved in the above content, such as generating, receiving, sending, or processing the data and / or information involved in the above method.

[0147] The chip system may be composed of chips, or may include chips and other discrete devices.

[0148] The processor mentioned in any of the above may be a CPU, a microprocessor, an ASIC, or one or more integrated circuits for executing a program for controlling the above-mentioned feedback information transmission method.

[0149] In one possible design, the chip system also includes a memory for storing necessary program instructions and data. The processor and the memory can be decoupled and provided on different devices, respectively, and connected via wired or wireless means to support the chip system in implementing the various functions of the above embodiments. Alternatively, the processor and the memory can be coupled on the same device.

[0150] Optionally, the computer instructions are stored in a memory.

[0151] Optionally, the memory is a storage unit within the chip, such as a register, cache, etc. The memory can also be a storage unit within the terminal located outside the chip, such as ROM or other types of static storage devices that can store static information and instructions, RAM, etc.

[0152] It can be understood that the memory in the present invention can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories.

[0153] The non-volatile memory may be ROM, programmable ROM (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory.

[0154] Volatile memory can be RAM, which is used as an external cache memory. There are many different types of RAM, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct memory bus RAM.

[0155] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A simulation test method for a main ventilation fan in a coal mine, characterized in that: include: Acquire a first image of a fan blade of a main ventilation fan of a coal mine, where a plane of the first image is perpendicular to an axis direction of the main ventilation fan of the coal mine, and the number of the first images is multiple; adjusting the shooting time of the second image according to the clarity of the first image; Acquire a second image of the fan blades of the main ventilation fan of the coal mine, where the plane of the second image is parallel to the axis direction of the main ventilation fan of the coal mine; Using the second image, a displacement fluctuation curve of a fan blade of a main ventilation fan in a coal mine is drawn; Obtain the dynamic bending parameters of the shaft of the main ventilation fan in the coal mine and use the dynamic bending parameters to draw the bending fluctuation curve of the shaft; Correlate the displacement fluctuation curve with the bending fluctuation curve and mark the surge location of the main ventilation fan of the coal mine on the bending fluctuation curve; Adjusting the shooting time of the second image according to the clarity of the first image includes: Draw a reference baseline based on the rotation path of the coal mine main ventilation fan blades; Use the pixels on the reference baseline to draw the analysis curve; Determine the peak point on the analysis curve, the number of peak points is one or more; When the number of peak points is two, the shooting time of the second image is adjusted to reduce the number of peak points to one or two. When the number of peak points is two, the distance between the two peak points is less than or equal to the set distance value.

2. The simulation test method for a main ventilation fan in a coal mine according to claim 1, characterized in that: Determining the peak point on the analysis curve includes: Determine the sudden change area on the analysis curve, the number of sudden change areas is two or three; The sudden change area on the analysis curve is processed using wavelet transform to obtain multiple sub-analysis curves, each of which has a starting point and an end point; Determining the starting position of the peak point according to the starting position point and the ending position point of the sub-analysis curve, wherein the starting position point and the ending position point of the sub-analysis curve do not coincide with the end point of the analysis curve; The first and last starting positions are taken as the peak points on the analysis curve.

3. The simulation test method for a main ventilation fan in a coal mine according to claim 2, characterized in that: Determining the starting position of the peak point according to the starting position point and the ending position point of the sub-analysis curve includes: Determine the collection area of ​​the starting position points of the sub-analysis curve and the collection area of ​​the ending position points of the sub-analysis curve; The coordinates of the position points in the collection area are averaged to obtain the starting position of the peak point. The position points in the collection area include the starting position point and the ending position point of the sub-analysis curve.

4. The simulation test method for a main ventilation fan in a coal mine according to any one of claims 1 to 3, characterized in that: Using the second image to draw the displacement fluctuation curve of the fan blades of the main ventilation fan in a coal mine includes: determining an outline of a coal mine main ventilation fan blade and a color baseline of the coal mine main ventilation fan blade on the second image; Calculate the position offset between the color baseline and the outline; Use position offset to draw the displacement fluctuation curve of the fan blades of the main ventilation fan in a coal mine.

5. The simulation test method for a main ventilation fan of a coal mine according to claim 4, characterized in that: When determining the outline of the coal mine main ventilation fan blade and the color baseline of the coal mine main ventilation fan blade on the second image, the method further includes: Establish multiple analysis baselines perpendicular to the rotation direction of the coal mine main ventilation fan blades; Create a difference series or a quadratic difference series using the pixels on the analysis baseline; Determine the outline points of the coal mine main ventilation fan blades and the color baseline points of the coal mine main ventilation fan blades according to the difference series or the quadratic difference series; Use the contour points of the coal mine main ventilation fan blades and the color baseline points of the coal mine main ventilation fan blades to create an analysis baseline segment; The analysis baseline segment is rotated based on the color baseline point of the fan blade of the main ventilation fan of the coal mine to minimize the length of the analysis baseline segment; Calculate the length ratios of the blades of the main ventilation fan in coal mines on both sides of the color baseline point and calculate the average of multiple length ratios.

6. The simulation test method for a main ventilation fan in a coal mine according to claim 1, characterized in that: Correlating the displacement fluctuation curve with the bending fluctuation curve and marking the surge location of the main ventilation fan in the coal mine on the bending fluctuation curve includes: Correlate displacement fluctuation curves with surge events; Determining a correlation region on the displacement fluctuation curve according to the correlated surge event, wherein a time period corresponding to the correlation region is before a time period corresponding to the surge event; The time period corresponding to the associated area is marked on the curved fluctuation curve.

7. A simulation test device for a main ventilation fan in a coal mine, characterized in that: include: A first acquisition unit is configured to acquire a first image of a fan blade of a main ventilation fan of a coal mine, wherein a plane where the first image is located is perpendicular to an axis direction of the main ventilation fan of the coal mine, and the number of the first images is multiple; a first adjusting unit, configured to adjust a shooting time of the second image according to the clarity of the first image; A second acquisition unit is used to acquire a second image of the fan blades of the main ventilation fan of the coal mine, where the plane where the second image is located is parallel to the axis direction of the main ventilation fan of the coal mine; A first drawing unit is configured to draw a displacement fluctuation curve of a fan blade of a main ventilation fan in a coal mine using the second image; The second drawing unit is used to obtain the dynamic bending parameters of the shaft of the main ventilation fan of the coal mine and draw the bending fluctuation curve of the shaft using the dynamic bending parameters of the shaft; A correlation processing unit, used for correlating the displacement fluctuation curve with the bending fluctuation curve and marking the surge occurrence location area of ​​the main ventilation fan of the coal mine on the bending fluctuation curve; Adjusting the shooting time of the second image according to the clarity of the first image includes: Draw a reference baseline based on the rotation path of the coal mine main ventilation fan blades; Use the pixels on the reference baseline to draw the analysis curve; Determine the peak point on the analysis curve, the number of peak points is one or more; When the number of peak points is two, the shooting time of the second image is adjusted to reduce the number of peak points to one or two. When the number of peak points is two, the distance between the two peak points is less than or equal to the set distance value.

8. A monitoring system for a main ventilation fan in a coal mine, characterized in that: The system comprises: one or more memories for storing instructions; and One or more processors, configured to call and execute the instructions from the memory to perform the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium comprises: The program, when executed by a processor, executes the method according to any one of claims 1 to 6.

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