Foreign matter monitoring method and device applied to nuclear turbine maintenance

Abstract

The invention relates to the technical field of nuclear power, in particular to a foreign matter monitoring method and device applied to nuclear turbine maintenance. The invention provides a foreign matter monitoring method applied to nuclear turbine maintenance, and the method is applied to a foreign matter monitoring device, and the method comprises the steps: carrying out the recognition of a first to-be-recognized tool in a placement region through an information collection assembly, and obtaining an approach recognition result, the first to-be-identified tool is an article carried by a maintainer when the maintainer enters a workplace; a second to-be-recognized tool placed in the placement area is recognized through the information collection assembly, a departure recognition result is obtained, and the second to-be-recognized tool is an article carried by the maintenance personnel when leaving the workplace; according to the approach identification result and the departure identification result, determining a foreign matter monitoring result; according to the invention, the technical problem of lack of monitoring of foreign matters in the maintenance process of the nuclear turbine in the prior art can be solved.

Description

Technical Field

[0001] This application relates to the field of nuclear power technology, and in particular, to a foreign object monitoring method and device applied to the maintenance of nuclear power steam turbines. Background Art

[0002] In the prior art, a steam turbine applied in the nuclear power field uses steam generated by a nuclear reactor to drive the rotation of blades, converting the kinetic energy of the steam into mechanical energy, and then driving a generator to generate electricity. The working principle of a nuclear power steam turbine is similar to that of an ordinary steam turbine. However, as a core device in the conventional island of a nuclear power plant, the operation stability and safety of a nuclear power steam turbine are directly related to the overall safety of the nuclear power plant.

[0003] In actual operation, in the maintenance operation scenario of a nuclear power steam turbine, the maintenance environment must be maintained under extremely high purity and precise control standards. Even if extremely fine foreign objects enter the interior of the steam turbine, a series of serious consequences may be caused, such as blade damage, increased vibration of the unit, decreased efficiency, and even shutdown accidents.

[0004] In practical applications, during the maintenance of a nuclear power steam turbine, the monitoring of foreign objects usually relies on manual monitoring, resulting in low monitoring efficiency and low monitoring accuracy. Further, it cannot ensure the absolute purity of the internal environment of the steam turbine, bringing potential risks to the safe and stable operation of the nuclear power plant. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a foreign object monitoring method and device applied to the maintenance of nuclear power steam turbines to solve the technical problem that the prior art lacks the monitoring of foreign objects during the maintenance process of nuclear power steam turbines.

[0006] In a first aspect, this application provides a foreign object monitoring method applied to the maintenance of nuclear power steam turbines, which is applied to a foreign object monitoring device. The device is arranged outside the workplace where the nuclear power steam turbine is located. The device includes: a table body and an information collection component arranged on the table body. A placement area is arranged on the table body. The method includes:

[0007] Identifying a first tool to be identified placed in the placement area through the information collection component to obtain an entry identification result. The first tool to be identified is an item carried by a maintenance personnel when entering the workplace.

[0008] Identifying a second tool to be identified placed in the placement area through the information collection component to obtain a departure identification result. The second tool to be identified is an item carried by the maintenance personnel when leaving the workplace.

[0009] Determining a foreign object monitoring result according to the entry identification result and the departure identification result.

[0010] In a second aspect, the present application provides a foreign object monitoring device applied to the maintenance of a nuclear power steam turbine. The device is arranged outside the workplace where the nuclear power steam turbine is located. The device includes: a table body and an information collection component arranged on the table body. A placement area is arranged on the table body;

[0011] The information collection component is used to identify a first tool to be identified placed in the placement area through the information collection component, and obtain an on-site entry identification result. The first tool to be identified is an item carried by a maintenance worker when entering the workplace;

[0012] The information collection component is further used to identify a second tool to be identified placed in the placement area through the information collection component, and obtain an on-site exit identification result. The second tool to be identified is an item carried by the maintenance worker when leaving the workplace;

[0013] Among them, the on-site entry identification result and the on-site exit identification result are used to determine the foreign object monitoring result.

[0014] Beneficial effects:

[0015] The present application provides a foreign object monitoring method applied to the maintenance of a nuclear power steam turbine. The method is applied to a foreign object monitoring device. The method includes: identifying a first tool to be identified placed in a placement area through an information collection component, and obtaining an on-site entry identification result. The first tool to be identified is an item carried by a maintenance worker when entering the workplace; identifying a second tool to be identified placed in the placement area through the information collection component, and obtaining an on-site exit identification result. The second tool to be identified is an item carried by the maintenance worker when leaving the workplace; determining the foreign object monitoring result according to the on-site entry identification result and the on-site exit identification result.

[0016] In summary, the present application automatically identifies the tools to be identified before the maintenance worker enters the workplace and after the maintenance worker leaves the workplace through the foreign object monitoring device. Subsequently, the foreign object monitoring result can be automatically determined according to the identification result obtained before entering the workplace and the identification result obtained after leaving the workplace. Since the above process realizes the automatic monitoring of foreign objects that may appear in the maintenance of nuclear power steam turbines, the present application can solve the technical problem that the prior art lacks the monitoring of foreign objects in the maintenance process of nuclear power steam turbines. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. The following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a foreign matter monitoring device for nuclear power steam turbine maintenance provided by an embodiment of the present application at a first angle;

[0019] Figure 2 A schematic diagram of the structure of a foreign matter monitoring device for nuclear power steam turbine maintenance provided by an embodiment of the present application at a second angle;

[0020] Figure 3 A schematic flow chart of a foreign body monitoring method for nuclear power steam turbine maintenance provided in an embodiment of the present application;

[0021] Figure 4 A logical schematic diagram of a foreign matter monitoring method for nuclear power steam turbine maintenance provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] During the operation of nuclear power steam turbines, foreign objects must be strictly prevented from entering the working area.

[0023] If foreign objects that enter the workplace of a nuclear power turbine are drawn into the nuclear power turbine, it will endanger the normal operation of the nuclear power turbine; in actual applications, even tiny foreign objects such as tiny metal debris are drawn between the blades and precision parts such as the shaft seal of the nuclear power turbine, which will cause the parts of the nuclear power turbine to wear more severely and even destroy the dynamic balance, thereby generating abnormal vibrations, which will not only reduce the mechanical efficiency of the nuclear power turbine, but long-term accumulation may also cause catastrophic failures such as blade breakage and shaft damage, endangering the overall safe and stable operation of the nuclear power unit; in addition, foreign objects drawn into the nuclear power turbine may also interfere with the flow state of the medium inside the turbine, affect the thermal cycle efficiency, and have a negative impact on the economic efficiency of nuclear power production.

[0024] In actual operation, the maintenance process of a nuclear power steam turbine that may bring foreign objects to the workplace where the nuclear power steam turbine is located needs to be monitored with emphasis; because if maintenance personnel leave maintenance tools in the workplace of the nuclear power steam turbine or if maintenance personnel accidentally cause the maintenance tools to collide in the workplace of the nuclear power steam turbine, it is possible that part or all of the structure of the maintenance tools remains in the workplace of the nuclear power steam turbine, resulting in bringing foreign objects to the workplace where the nuclear power steam turbine is located. Therefore, strictly controlling, accurately identifying, and tracing the foreign objects that may appear during the maintenance process has become one of the core requirements of the nuclear power steam turbine maintenance work. However, the existing technology lacks the foreign object monitoring process for the above-mentioned maintenance process.

[0025] To solve the above technical problems, the present application provides a technical solution for foreign object monitoring applied to the maintenance of nuclear power steam turbines. This technical solution is applied to a foreign object monitoring device, and the foreign object monitoring device is arranged outside the workplace of the nuclear power steam turbine, as Figure 1 and Figure 2 shown, Figure 1 is a schematic structural diagram of the foreign object monitoring device applied to the maintenance of nuclear power steam turbines provided by an embodiment of the present application at a first angle, Figure 2 is a schematic structural diagram of the foreign object monitoring device applied to the maintenance of nuclear power steam turbines provided by an embodiment of the present application at a second angle. The device includes: a table body 100 and a first video acquisition component 200, a second video acquisition component 300, a visualization device 400, and a computer device ( Figure 1 and Figure 2 not shown) arranged on the table body 100; wherein, the table body 100 includes: a placement area 110.

[0026] Among them, the first video acquisition component 200 can be used to perform video acquisition on maintenance personnel entering and leaving the workplace, and the second video acquisition component 300 can be used to perform video acquisition on the tools to be identified placed in the placement area 110. The visualization device 400 is used to display the video information of the maintenance personnel and the tools to be identified and the foreign object monitoring results, and the computer device is used to determine the foreign object monitoring results according to the video information of the maintenance personnel and the tools to be identified; the placement area 110 is arranged on the top surface of the table body 100 to facilitate video acquisition.

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0028] First, this application provides a foreign object monitoring method applied to the maintenance of nuclear power steam turbines. As Figure 3 shown, Figure 3 FIG. is a schematic flow chart of the foreign object monitoring method applied to the maintenance of nuclear power steam turbines provided by an embodiment of this application. The method includes: S110 to S130, details are as follows:

[0029] S110: Identify the first tool to be recognized placed in the placement area through the information collection component, and obtain the entry recognition result. The first tool to be recognized is an item carried by the maintenance personnel when entering the workplace;

[0030] Specifically, in the embodiment of this application, the information collection component includes: the second video collection component 300; in the embodiment of this application, the maintenance tools entering (i.e., entering the site) and leaving (i.e., leaving the site) the workplace of the nuclear power steam turbine need to be automatically registered through the foreign object monitoring device to achieve precise monitoring of possible foreign objects during the maintenance process; compared with the method of manual recognition, by using the second video collection component 300 to collect information on the tool to be recognized placed in the placement area 110, and then identifying the tool to be recognized according to the collected information to record the entry recognition result of the tool to be recognized when entering the site, the accuracy and efficiency of recognizing the tool to be recognized can be significantly improved.

[0031] In practical applications, the above-mentioned entry recognition result is used to compare with the departure status information of the tool to be recognized when leaving the site to determine the changes that have occurred to the tool to be recognized between entering and leaving the site. Finally, based on the above-mentioned "occurred changes", it is determined whether there are foreign objects left in the workplace of the nuclear power steam turbine during the use of the tool to be recognized and the maintenance of the steam turbine. In one implementation, the information collection component includes: the first video collection component 200 provided on the table 100; the maintenance personnel includes: the first person to be recognized who needs to be recognized and registered when entering the workplace; S110 includes: step (1) to step (5), details are as follows:

[0032] Step (1): Obtain the personnel entry image through the first video collection component.

[0033] Specifically, in the embodiment of this application, in order to improve the precise monitoring of the maintenance process of the nuclear power steam turbine, it is necessary to recognize and register the maintenance personnel to prevent unqualified maintenance personnel or other personnel who may pose a hazard to the nuclear power steam turbine from entering the workplace of the nuclear power steam turbine.

[0034] During the maintenance process, since there are often more than one maintenance personnel entering and leaving the site, the tools to be identified carried by different maintenance personnel may be different. Even the tools carried by the same maintenance personnel when entering and leaving the site may also be different. As long as they have not been registered, the above-mentioned maintenance personnel and tools to be identified are in the "to be identified" state, and their true identities and true information are in the "to be determined" state. Therefore, in principle, it is necessary to distinguish the maintenance personnel and tools to be identified when entering and leaving the site to indicate the purpose of "separate identification" of the maintenance personnel and tools to be identified when entering and leaving the site. For this reason, in the embodiments of the present application, the maintenance personnel when entering the site are determined as "the first personnel to be identified", the tools carried by the maintenance personnel when entering the site are determined as "the first tools to be identified", the maintenance personnel when leaving the site are determined as "the second personnel to be identified", and the tools carried by the maintenance personnel when leaving the site are determined as "the second tools to be identified"; it should be emphasized that the above-mentioned "first" and "second" only indicate "entering" and "leaving", and will not be elaborated later.

[0035] In practical applications, when the first personnel to be identified enter the workplace or the second personnel to be identified leave the workplace, the first personnel to be identified and the second personnel to be identified can stand in front of the first video acquisition component or sit on the seat, as long as it is ensured that the first video acquisition component can collect the images of the first personnel to be identified and the second personnel to be identified. As for the images obtained, whether they are headshots, half-body shots or full-body shots, the present application does not make specific limitations.

[0036] In actual operation, any person or object that may cause direct harm or potential harm to the operation of the nuclear power steam turbine can be determined as a "foreign object" to ensure that all hazards are isolated from the nuclear power steam turbine and the normal operation of the nuclear power steam turbine is guaranteed.

[0037] Step (2): Match the personnel entry image with the personnel registration image of the qualified maintenance personnel stored in the first basic table in the database to obtain the first matching information.

[0038] Among them, the first basic table is used to store the personnel registration information of the qualified maintenance personnel with maintenance qualifications, and the personnel registration information includes: personnel registration images.

[0039] Specifically, in practical applications, there are multiple basic tables stored in the database, and the basic table storing the personnel registration information of the qualified maintenance personnel with maintenance qualifications is determined as the first basic table; as shown in Table 1, Table 1 is an example table of the first basic table.

[0040] Table 1

[0041] Serial number Personnel name Personnel identification Personnel registration image Personnel qualifications …… 1

[0042] In Table 1, the personnel identifier can be data such as the employee number of the employee that can uniquely identify the qualified maintenance personnel; the specific content of the personnel identifier is not specifically limited in this application; other information of the qualified maintenance personnel can also be recorded in Table 1, which is not specifically limited in this application.

[0043] In actual operation, the first video acquisition component 200 acquires the current image of the first person to be identified (i.e., the personnel entry image), and then compares the personnel entry image acquired by the first video acquisition component 200 with the personnel registration images in Table 1 one by one to obtain the first matching information, so as to determine whether the first person to be identified is a qualified maintenance personnel; among them, comparing the personnel entry image and the personnel registration image is by calculating the similarity between the two images.

[0044] Step (3): If the first matching information indicates that the first person to be identified is a qualified maintenance personnel, match the first personnel identifier with the second personnel identifier of the target maintenance personnel of the nuclear power steam turbine maintenance plan stored in the second basic table in the database to obtain the second matching information;

[0045] Among them, the personnel registration information further includes: the first personnel identifier of the qualified maintenance personnel; the nuclear power steam turbine maintenance plan includes: the target plan identifier, the target maintenance content, the target maintenance date, and the second personnel identifier; the target plan identifier is the identifier of the nuclear power steam turbine maintenance plan.

[0046] Specifically, if the first matching information indicates that the first person to be identified is not a qualified maintenance personnel, the first person to be identified is not allowed to enter.

[0047] In actual operation, the first video acquisition component 200 includes a visualization area for displaying the personnel entry image and the personnel departure image. When the first video acquisition component 200 acquires the personnel entry image of the first person to be identified, the personnel entry image can be correspondingly displayed through the visualization area therein; if the first matching information indicates that the first person to be identified is not a qualified maintenance personnel, the first person to be identified can confirm whether the corresponding personnel entry image is accurate. If it is not accurate, step (1) can be executed again.

[0048] If the first matching information indicates that the first person to be identified is a qualified maintenance personnel, it is necessary to further determine whether the first person to be identified is the target maintenance personnel in the nuclear power steam turbine maintenance plan. If the first person to be identified is not the target maintenance personnel, the first person to be identified is also not allowed to enter; if the first person to be identified is the target maintenance personnel, then register the first person to be identified and let the first person to be identified enter the workplace of the nuclear power steam turbine after registration.

[0049] In the embodiment of this application, the basic table storing the nuclear power steam turbine maintenance plan is determined as the second basic table; as shown in Table 2, Table 2 is an example table of the second basic table.

[0050] Table 2

[0051]

[0052] In Table 2, the target plan identifier is data that can uniquely identify the nuclear power steam turbine maintenance plan; the specific content of the target plan identifier is not specifically limited in this application; other information of the nuclear power steam turbine maintenance plan may also be recorded in Table 2, which is not specifically limited in this application.

[0053] In actual operation, after determining that the first person to be identified is a qualified maintenance person, the first person identifier of the first person to be identified can be matched with the second person identifier of the qualified maintenance person in the nuclear power steam turbine maintenance plan stored in the second basic table in the database to obtain the second matching information.

[0054] In actual operation, the information content of the first matching information and the second matching information can be determined according to actual needs, as long as the first matching information can clearly indicate whether the first person to be identified is a qualified maintenance person, and the second matching information can clearly indicate whether the first person to be identified is included in the target maintenance persons in the nuclear power steam turbine maintenance plan recorded in the second basic table. This application does not make specific limitations on this.

[0055] Step (4): If the second matching information indicates that the first person to be identified is a target maintenance person, determine the first person to be identified as the on-site maintenance person and determine the on-site arrival time of the first person to be identified.

[0056] Specifically, if the second matching information indicates that the first person to be identified is a target maintenance person, that is, if the second matching information indicates that the second person identifier of the target maintenance persons included in the nuclear power steam turbine maintenance plan in the second basic table has the first person identifier of the first person to be identified, the first person to be identified can be determined as the on-site maintenance person.

[0057] In actual operation, the on-site arrival time of the person can be "the time when the on-site arrival image of the person is collected", or can be "the time when the first person to be identified is determined as the on-site maintenance person", which is not specifically limited in this application.

[0058] Step (5): Register the target plan identifier, the on-site arrival image of the on-site maintenance person, the on-site arrival time of the person, and the second person identifier corresponding to the on-site maintenance person into the third basic table in the database.

[0059] Specifically, in the embodiment of the present application, the plan information and entry / exit information of the current nuclear power steam turbine maintenance plan (the nuclear power steam turbine maintenance plan being executed) stored in Table 2 are stored. Among them, the plan information is the information corresponding to the current nuclear power steam turbine maintenance plan in Table 2 (such as the target plan identifier), and the entry / exit information refers to the recognition results obtained by the foreign object monitoring device when the maintenance personnel and the to-be-identified tools executing the current nuclear power steam turbine maintenance plan are recognized before entering the workplace and the recognition results obtained by the foreign object monitoring device after leaving the workplace.

[0060] In the embodiment of the present application, the basic table storing the plan information and entry / exit information of multiple nuclear power steam turbine maintenance plans is determined as the third basic table; as shown in Table 3, Table 3 is an example table of the third basic table.

[0061] Table 3

[0062]

[0063] In the embodiment of the present application, since each record in Table 3 records the plan information and entry / exit information of a nuclear power steam turbine maintenance plan, each record can start from the target plan identifier corresponding to the current nuclear power steam turbine maintenance plan; in actual operation, part of the information is recorded when the first to-be-identified person and the first to-be-identified tool enter the site, and part of the information is recorded when the second to-be-identified person (when confirmed to be the same person as the first to-be-identified person) and the second to-be-identified tool leave the site, and finally a complete record of the current nuclear power steam turbine maintenance plan is formed.

[0064] It should be emphasized that a nuclear power steam turbine maintenance plan may have multiple maintenance personnel, and each maintenance personnel corresponds to one record. In actual operation, based on Table 3, the association between maintenance personnel, maintenance tools, etc. can be realized. Therefore, when multiple maintenance personnel enter and / or leave the site in sequence, the accurate correspondence between each maintenance personnel and the maintenance tools they carry can be realized, the registration attribution can be clarified, and the mismatch between maintenance personnel and maintenance tools can be prevented.

[0065] In one implementation manner, the information acquisition component includes: a second video acquisition component 300 disposed on the table 100; the entry recognition result includes: the tool entry image; S110 further includes: steps (6) to (8), as detailed below:

[0066] Step (6): Use the second video acquisition component to perform image acquisition on at least one first to-be-identified tool placed in the placement area to obtain the initial tool image.

[0067] Specifically, in the embodiments of the present application, the recognition of the tool to be recognized is performed based on the initial tool image of the first tool to be recognized. Among them, the first person to be recognized can randomly, disorderly, and non-stackedly place the first tool to be recognized in the placement area 110, and the second video acquisition component 300 can collect images of all the first tools to be recognized in the placement area 110 to obtain the initial tool image. The initial tool image can be displayed in real time on the visualization device 400. In actual operation, the initial tool image can also be stored in the third basic table.

[0068] In actual operation, the video of the first tool to be recognized can be collected by the second video acquisition component 300, and then a video frame is intercepted from the video as the initial tool image.

[0069] Step (7): Perform recognition processing on the initial tool image through the target detection model to obtain the tool recognition image.

[0070] Among them, the image content of the tool recognition image includes the image content of the initial tool image and the prediction box, and the image content within the prediction box is used to indicate the first tool to be recognized.

[0071] Specifically, in the embodiments of the present application, the target detection model is the YOLO (You Only Look Once) model, and the target detection model can accurately identify the tool type of the first tool to be recognized in the tool recognition image. In actual application, the tool recognition image is equivalent to marking the prediction box and prediction type information on the basis of the initial tool image. The image content within the prediction box is the first tool to be recognized, and the prediction type information indicates the tool type of the first tool to be recognized. Among them, if there are multiple first tools to be recognized in the tool recognition image, one prediction box corresponds to one tool to be recognized, and usually there is also a one-to-one correspondence between multiple prediction boxes and multiple prediction type information.

[0072] In actual operation, before inputting the initial tool image into the target detection model, it is necessary to preprocess the initial tool image first, such as processing contents including denoising and scale adjustment, etc., to improve the accuracy of the prediction box and prediction type information output by the target detection model.

[0073] Step (8): Intercept at least one tool entry image from the tool recognition image according to the prediction box; where the tool entry image is used to indicate a first tool to be recognized.

[0074] Specifically, in practical applications, the first person to be identified can stand one by one in front of the first video acquisition component 200 to obtain the person's entry image. However, it is not necessary to place the first tool to be identified one by one in the placement area 110 to obtain the initial tool image of the first tool to be identified. After all the first tools to be identified carried by the first person to be identified are placed in the placement area 110 and the tool recognition image is output through the target detection model, the image content of the prediction box can be intercepted and the intercepted image can be used as the tool entry image of the first tool to be identified.

[0075] In actual operation, the tool entry images of each first tool to be identified can be displayed through the visualization device 400 and the first person to be identified can be provided to check and confirm the tool quantity and tool type of the first tool to be identified carried by him / her. If the first person to be identified believes that a certain first tool to be identified displayed in a tool entry image is not the one he / she carried, step (6) needs to be re-executed.

[0076] In actual operation, for the third-party tools carried by the first person to be identified, the unrecognized third-party tools can be manually checked in the tool entry images displayed by the visualization device 400. Subsequently, information such as the tool name and tool type of the third-party tool can be registered on-site, which is convenient for quickly logging in the third-party tool and quickly executing the entry process.

[0077] In actual operation, the registration of the third-party tool can be performed in the background or on-site, with priority given to background registration. Among them, background registration means registering the third-party tool in the fourth basic table. After registration, the third-party tool becomes a tool with maintenance qualification.

[0078] If the large maintenance tools carried by the first person to be identified cannot be placed in the placement area 110, a multi-functional barcode scanner can be used to scan the relevant barcodes or QR codes of the large maintenance tools to obtain the tool information of the maintenance tools, and then the tool information can be transmitted to the visualization device 400.

[0079] In one implementation, the height of the second video acquisition component relative to the table body 100 is adjustable; the device further includes a supplementary light component, and the illumination intensity of the supplementary light component is adjustable; after step (8), S110 further includes: step (9) to step (10), details are as follows:

[0080] Step (9): Determine the clarity of each tool entry image.

[0081] Specifically, in actual operation, since the first tool to be recognized is randomly placed in the placement area 110, the clarity of the tool entry image of a certain first tool to be recognized may be relatively low, resulting in it being unable to be used for subsequent matching of the first tool to be recognized. Therefore, if there is a tool entry image with a clarity less than the clarity threshold, it is necessary to perform another image acquisition for the first tool to be recognized corresponding to this tool entry image.

[0082] Step (10): If there is a tool entry image with a corresponding clarity less than the clarity threshold, adjust the height and / or light intensity.

[0083] Specifically, if there is a tool entry image with a clarity less than the clarity threshold, it is necessary to perform another image acquisition for the first tool to be recognized corresponding to this tool entry image. However, before performing another image acquisition, it is necessary to adjust the height of the second video acquisition component relative to the table body 100 and / or the light intensity of the supplementary light component.

[0084] In actual operation, the content of adjusting the height of the second video acquisition component 300 relative to the table body 100 and / or the light intensity of the supplementary light component can be determined according to actual needs, and this application does not make specific limitations on this; the focal length of the second video acquisition component 300 can also be automatically adjusted.

[0085] After adjusting for clarity, a clearer and more delicate tool entry image can be obtained, so it can effectively ensure the smooth progress of subsequent image analysis and processing work and the accuracy and efficiency of maintenance tool traceability.

[0086] In one implementation, after S110, the method further includes: steps (11) to (13), the details are as follows:

[0087] Step (11): Match at least one tool entry image with the tool registration image of the qualified maintenance tool stored in the fourth basic table in the database to obtain the fourth matching information.

[0088] Among them, the fourth basic table is used to store the tool registration information of the qualified maintenance tools with maintenance qualifications, and the tool registration information includes: tool registration image, tool name, and tool type.

[0089] Specifically, in the embodiment of this application, the basic table storing the tool registration information of the qualified maintenance tools with maintenance qualifications is determined as the fourth basic table; as shown in Table 4, Table 4 is an example table of the fourth basic table.

[0090] Table 4

[0091]

[0092]

[0093] In Table 4, the tool type is data that can uniquely identify qualified maintenance tools; other information about the qualified maintenance tools can also be recorded in Table 4, and this application does not make specific limitations on this.

[0094] Step (12): If the fourth matching information indicates that the first tool to be identified indicated by the tool entry image is a qualified maintenance tool, determine the first tool to be identified as the tool for entry maintenance and determine the tool entry time of the first tool to be identified.

[0095] Specifically, if the fourth matching information indicates that the first tool to be identified is a qualified maintenance tool, that is, if the fourth matching information indicates that there is a tool entry image of the first tool to be identified among the multiple tool registration images stored in the fourth basic table, the first tool to be identified can be determined as the tool for entry maintenance.

[0096] In actual operation, the tool entry time can be "the time when the tool entry image is collected", or can be "the time when the first tool to be identified is determined as the tool for entry maintenance", and this application does not make specific limitations on this.

[0097] Step (13): Register the tool entry image, tool entry time, tool name, and tool type corresponding to the first tool to be identified into the third basic table.

[0098] S120: Identify the second tool to be identified placed in the placement area through the information collection component to obtain an exit identification result, and the second tool to be identified is an item carried by the maintenance personnel when leaving the workplace.

[0099] Specifically, in the embodiment of this application, in order to accurately identify maintenance tools and accurately monitor foreign objects, it is also necessary to identify when the tool to be identified exits.

[0100] In one implementation, the person to be identified includes: the second person to be identified who needs to be identified and registered when leaving the workplace; S120 includes: Step (14) to Step (17), details are as follows:

[0101] Step (14): Obtain a person exit image through the first video acquisition component.

[0102] Step (15): Match the person exit image with the person entry images stored in the third basic table to obtain the third matching information.

[0103] Specifically, matching the person exit image with the person entry images in the third basic table can be used to determine whether the second person to be identified is an entry maintenance personnel. If the second person to be identified is not an entry maintenance personnel, it indicates that this "second person to be identified" is a "foreign object" and early warning is required.

[0104] Step (16): If the third matching information indicates that the second person to be identified is a maintenance personnel entering the site, determine the departure time of the second person to be identified.

[0105] Specifically, in actual operation, the departure time of the person may be "the time when the departure image of the person is collected", or may be "the time when the second person to be identified is determined as the maintenance personnel entering the site", and this application does not make specific limitations on this.

[0106] Step (17): Register the departure image of the person corresponding to the second person to be identified and the departure time of the person in the third basic table.

[0107] Specifically, in actual operation, if the third matching information indicates that the second person to be identified is a maintenance personnel entering the site, register the departure image of the person and the departure time of the person in the record corresponding to the maintenance personnel entering the site in the third basic table.

[0108] In one implementation manner, the departure recognition result includes: the departure image of the tool; after S120, the method further includes: steps (18) to (20), and the details are as follows:

[0109] Step (18): Match at least one departure image of the tool with the tool entry image stored in the third basic table to obtain the fifth matching information.

[0110] Specifically, in the embodiment of this application, when the second person to be identified leaves the site with the second tool to be identified, it is also necessary to collect the departure image of the second tool to be identified through the second video acquisition component; in actual operation, the method for obtaining the departure image of the tool can be performed with reference to the method for obtaining the tool entry, that is, steps (6) to (10) can be referred to obtain the departure image of the tool, which will not be elaborated here.

[0111] Matching the departure image of the tool with the tool entry image in the third basic table can be used to determine whether the second tool to be identified is a tool for maintenance entering the site. If the second tool to be identified is not a tool for maintenance entering the site, a warning needs to be given.

[0112] In actual operation, the matching is performed by determining the similarity between the departure image of the tool and the tool entry image; among them, there may be multiple departure images of the tool and tool entry images, so it is necessary to group the departure image of the tool and the tool entry image first to obtain multiple groups of departure images of the tool and tool entry images, and then match each group of departure images of the tool and tool entry images; for example, if there are 5 departure images of the tool and tool entry images, it is necessary to determine 5*5 = 25 groups of departure images of the tool and tool entry images correspondingly, and then calculate the similarity between the two images in each group of departure images of the tool and tool entry images.

[0113] In the process of calculating the similarity, first use the MedianHash64 algorithm to calculate the hash values of the tool departure image and the tool arrival image, and use the Hamming distance to compare the hash values of the tool departure image and the tool arrival image to calculate the similarity.

[0114] In actual operation, during the matching process for each group of tool departure images and tool arrival images, first rotate any one of the tool departure image and the tool arrival image by 30 degrees each time, and then determine the similarity between the rotated image and the unrotated image; when the rotation ends, multiple similarities can be obtained, and the similarity with the largest value among the multiple similarities is determined as the similarity of this group of tool departure images and tool arrival images; repeat the above steps until the similarities of all groups of tool departure images and tool arrival images are calculated.

[0115] After calculating the similarities of all groups of tool departure images and tool arrival images, determine the fifth matching information according to the multiple similarities with larger similarity values; for example, after calculating the similarities of 25 groups of tool departure images and tool arrival images, the 5 similarities with larger similarity values among them can be determined as the fifth matching information of the tool departure images and tool arrival images corresponding to these 5 similarities.

[0116] In actual operation, since both the tool arrival image and the tool departure image are obtained by intercepting the tool recognition image output by the target detection model, only the tool recognition image corresponding to the tool arrival image is for the first tool to be recognized, and the tool recognition image corresponding to the tool departure image is for the second tool to be recognized. Therefore, it is possible to first match the tool type of the second tool to be recognized with the tool types of the in-field maintenance tools stored in the third basic table. If the match is successful, the corresponding image matching process can be effectively reduced and the matching efficiency can be improved.

[0117] Step (19): If the fifth matching information indicates that the second tool to be recognized is an in-field maintenance tool, determine the tool departure time of the second tool to be recognized.

[0118] Specifically, in actual operation, the tool departure time can be "the time when the tool departure image is collected", or the time when "the second tool to be recognized is determined as an in-field maintenance tool", and this application does not make specific limitations on this.

[0119] Step (20): Register the tool departure image and the tool departure time corresponding to the second tool to be recognized in the third basic table.

[0120] Specifically, in actual operation, if the fifth matching information indicates that the second tool to be identified is a tool for on-site maintenance, the tool departure image and the tool departure time are registered in the record corresponding to the on-site maintenance tool in the third basic table.

[0121] In actual operation, maintenance personnel may leave the site temporarily during the maintenance of nuclear power steam turbines. When such a temporary departure occurs, it is handled according to the normal departure situation, but the above information needs to be updated in the relevant basic table to ensure accurate monitoring of foreign objects.

[0122] S130: Determine the foreign object monitoring result based on the on-site identification result and the departure identification result.

[0123] Specifically, in the embodiment of the present application, the identification result obtained before entering the workplace is the tool on-site image of each first tool to be identified, and the identification result obtained after leaving the workplace is the tool departure image of each second tool to be identified.

[0124] In actual operation, the tool on-site image and the tool departure image can be compared to determine whether there are inconsistencies, losses, extra items, and damages in at least one first tool to be identified when entering and at least one second tool to be identified when leaving (i.e., the foreign object monitoring result); among them, "inconsistency" means that there are different tools to be identified between the first tool to be identified when entering and the second tool to be identified when leaving, and the inconsistent tool to be identified is the foreign object; "loss" and "extra" refer to the lack and excess in quantity of the second tool to be identified when leaving compared to the first tool to be identified when entering. If there is a "loss", it means that there is a foreign object left in the workplace of the nuclear power steam turbine. If there is an "extra", it means that the foreign object that was once left in the workplace of the nuclear power steam turbine has been taken out of the workplace; "damage" means that the second tool to be identified when leaving is damaged compared to the first tool to be identified when entering, and the damaged part is left in the workplace of the nuclear power steam turbine.

[0125] If there are inconsistencies, losses, extra items, and damages, a warning message is generated and the warning message can be displayed through the visualization device 400; in practical applications, the reason for the warning message can be noted in the warning message and the corresponding information can be updated in the third basic table.

[0126] In actual operation, for the situations of "inconsistency", "loss", and "extra", it is relatively easy to confirm, but "damage" requires careful comparison; in the embodiment of the present application, the similarity between the tool on-site image and the tool departure image corresponding to each tool to be identified can be determined; if the similarity is less than the similarity threshold, it is determined that there is a foreign object remaining in the workplace.

[0127] In actual operation, the method for determining similarity can be determined by comparing the similarity of certain parts of the tool to be identified. For example, if the tool entry image and the tool exit image corresponding to the tool to be identified both include the handle of the tool to be identified, the similarity between the handle in the tool entry image and the handle in the tool exit image can be determined. If the similarity is less than the similarity threshold, it can be considered that the tool to be identified has been bumped or damaged in the workplace of the nuclear power steam turbine, and it is determined that foreign objects have been left in the workplace.

[0128] In one implementation, after S130, the method further includes steps (21) to (23), details are as follows:

[0129] Step (21): Determine the current entry information of the nuclear power steam turbine maintenance plan from the personnel entry image, the personnel entry time, the tool entry image, and the tool entry time.

[0130] Step (22): Determine the current exit information of the nuclear power steam turbine maintenance plan from the personnel exit image, the personnel exit time, the tool exit image, and the tool exit time.

[0131] Step (23): Determine the current plan information of the nuclear power steam turbine maintenance plan from the target plan identifier, the first personnel identifier, the tool name, the tool type, and the foreign object monitoring result.

[0132] Step (24): Record the current entry information, the current exit information, and the current plan information into the fifth basic table and the sixth basic table respectively;

[0133] Among them, the fifth basic table is used to store the current entry information, the current exit information, and the current plan information corresponding to each qualified maintenance personnel; the sixth basic table is used to store the current entry information, the current exit information, and the current plan information corresponding to each qualified maintenance tool.

[0134] Specifically, the fifth basic table is used to target the current entry information, the current exit information, and the current plan information from the perspective of the maintenance personnel; when it is necessary to trace the current entry information, the current exit information, and the current plan information from the perspective of the maintenance personnel, the corresponding current entry information, the current exit information, and the current plan information of this maintenance personnel can be matched in the fifth basic table according to the personnel identifier of this maintenance personnel.

[0135] The above information can show the complete record of the maintenance personnel's previous entries and exits from the workplace of the nuclear power steam turbine. For example, each time the personnel entry image, the personnel exit image of this maintenance personnel, as well as the name, type, and foreign object monitoring result of the tool to be carried, etc., the above information can be clearly displayed through the visualization device 400.

[0136] In actual operation, based on the above information of the maintenance personnel, information such as the long-term work habits of the maintenance personnel, tool usage preferences, and whether there are potential operation risks or signs of violations can be grasped.

[0137] The sixth basic table is used to trace information such as the current entry information, current departure information, and current plan information from the perspective of the tool to be identified; when it is necessary to trace information such as the current entry information, current departure information, and current plan information from the perspective of the tool to be identified, the corresponding current entry information, current departure information, and current plan information of the tool to be identified can be matched in the sixth basic table according to the tool type of the tool to be identified.

[0138] The above information can show the complete record of the tool to be identified entering and leaving the workplace of the nuclear power steam turbine, such as the first time the tool to be identified enters the workplace of the nuclear power steam turbine and the process of flowing among different maintenance personnel during multiple maintenance processes. The above information can be clearly displayed through the visualization device 400.

[0139] In actual operation, as Figure 4 shown, Figure 4 is the logical schematic diagram of the foreign object monitoring method applied to the maintenance of nuclear power steam turbines provided by the embodiment of the present application, Figure 4 showing four nodes in the foreign object monitoring process. The first node is the node for determining the personnel entry image and personnel entry time of the first person to be identified, the second node is the node for determining the tool entry image and tool entry time of the first tool to be identified, the third node is the node for determining the personnel exit image and personnel exit time of the second person to be identified, and the fourth node is the node for determining the tool exit image and tool exit time of the second tool to be identified. When the foreign object monitoring result indicates that a foreign object has appeared in the workplace of the nuclear power steam turbine, it can be traced through Figure 4 the four nodes shown; through the information in the fifth basic table and the sixth basic table, the relevant information of each node can be determined, and then the node where the foreign object may first appear and the subsequent transfer path can be accurately located; among them, the transfer path refers to the transfer process among different maintenance personnel.

[0140] By tracing the above information, it is beneficial to optimize the maintenance process of the nuclear power steam turbine, strengthen the awareness of standardized operation of personnel in a targeted manner, and comprehensively improve the quality of the maintenance work of the nuclear power steam turbine, so that each maintenance work can move forward steadily on a controllable, orderly, efficient and safe track.

[0141] In actual operation, the daily entry information and departure information can also be retrieved according to the third basic table, and real-time statistics can be carried out on the relevant information of the maintenance personnel and the tool to be identified.

[0142] Second, the present application also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the steps of S110 to S130 provided in the above embodiments are implemented.

[0143] Third, the present application also provides a computer-readable storage medium. A computer program is stored on the computer-readable storage medium. When the computer program is run by a processor, the steps of S110 to S130 in the above embodiments are executed.

[0144] Fourth, the computer program product provided by the present application includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods in the foregoing method embodiments. For the specific implementation, reference can be made to the steps of S110 to S130 in the method embodiments, which will not be elaborated herein.

[0145] In the embodiments provided by the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For another example, 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 displayed or discussed coupling or direct coupling or communication connection between each other can be through some communication interfaces. The indirect coupling or communication connection of the devices or units can be in electrical, mechanical or other forms.

[0146] In addition, the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0147] Furthermore, in each embodiment of the present application, the functional modules can be integrated together to form an independent part, or each module can exist alone, or two or more modules can be integrated to form an independent part.

[0148] It should be noted that if a function is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of this 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 may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs.

[0149] In this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0150] The above are only embodiments of the present application and are not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A foreign body monitoring method for nuclear power steam turbine maintenance, characterized in that: Applied to a foreign body monitoring device, the device is arranged outside a workplace where a nuclear power steam turbine is located; the device comprises: a table body and an information collection component arranged on the table body, and a placement area is arranged on the table body; the method comprises: The information collection component identifies a first tool to be identified placed in the placement area to obtain an entry identification result, wherein the first tool to be identified is an item carried by a maintenance person when entering the workplace; The information collection component identifies a second tool to be identified placed in the placement area to obtain an off-site identification result, where the second tool to be identified is an item carried by the maintenance personnel when leaving the workplace; A foreign object monitoring result is determined according to the entry identification result and the departure identification result.

2. The method according to claim 1, characterized in that The information collection component includes: a first video collection component arranged on the table body; the maintenance personnel include: a first person to be identified who needs to be identified and registered when entering the workplace; the information collection component is used to identify the first tool to be identified placed in the placement area, and the entry identification result is obtained, including: Acquire an image of a person entering the venue through the first video acquisition component; Matching the personnel entry image with the personnel registration image of the qualified maintenance personnel stored in the first basic table in the database to obtain first matching information; The first basic table is used to store the personnel registration information of the qualified maintenance personnel with maintenance qualifications, and the personnel registration information includes: the personnel registration image.

3. The method according to claim 2, characterized in that The personnel registration information also includes: a first personnel identification of the qualified maintenance personnel; after the first matching information is obtained by matching the personnel entry image with the personnel registration image of the qualified maintenance personnel stored in the first basic table in the database, the method further includes: If the first matching information indicates that the first person to be identified is the qualified maintenance personnel, the first person identification is matched with the second person identification of the target maintenance personnel of the nuclear power steam turbine maintenance plan stored in the second basic table in the database to obtain second matching information; The nuclear power steam turbine maintenance plan includes: a target plan identifier, a target maintenance content, a target maintenance date and the second personnel identifier; the target plan identifier is an identifier of the nuclear power steam turbine maintenance plan; If the second matching information indicates that the first person to be identified is the target maintenance personnel, the first person to be identified is determined as an on-site maintenance personnel and the entry time of the first person to be identified is determined; The target plan identifier, the personnel entry image, the personnel entry time and the second personnel identifier corresponding to the on-site maintenance personnel are registered in the third basic table in the database.

4. The method according to claim 3, characterized in that The person to be identified includes: a second person to be identified who needs to be identified and registered when leaving the workplace; the information collection component identifies the second tool to be identified placed in the placement area to obtain the exit identification result, including: Acquire an image of personnel leaving the scene through the first video acquisition component; Matching the personnel exit image with the personnel entry image stored in the third basic table to obtain third matching information; If the third matching information indicates that the second person to be identified is the on-site maintenance personnel, determining the departure time of the second person to be identified; The person leaving image and the person leaving time corresponding to the second person to be identified are registered in the third basic table.

5. The method according to claim 4, characterized in that The information collection component includes: a second video collection component arranged on the table body; the entry recognition result includes: a tool entry image; the information collection component is used to identify the first tool to be identified placed in the placement area to obtain the entry recognition result, and further includes: The second video acquisition component acquires an image of at least one of the first tools to be identified placed in the placement area to obtain an initial image of the tool; Performing recognition processing on the initial tool image through the target detection model to obtain a tool recognition image; The image content of the tool recognition image includes the image content of the tool initial image and a prediction frame, and the image content in the prediction frame is used to indicate the tool to be recognized; According to the prediction frame, at least one tool approaching image is captured in the tool recognition image; wherein the tool approaching image is used to indicate one of the first tools to be recognized.

6. The method according to claim 5, characterized in that The height of the second video acquisition component relative to the table body is adjustable; the device also includes a fill light component, and the illumination intensity of the fill light component is adjustable; after at least one tool approaching image is intercepted in the tool recognition image, the method further includes: Determining the clarity of each of the tool approach images; If there is a corresponding tool approach image whose clarity is less than a clarity threshold, the height and / or the light intensity are adjusted.

7. The method according to claim 5, characterized in that After obtaining the approach identification result, the method further includes: Matching at least one of the tool approaching images with a tool registration image of a qualified maintenance tool stored in a fourth basic table in the database to obtain fourth matching information; Wherein, the fourth basic table is used to store tool registration information of the qualified maintenance tools with maintenance qualifications, and the tool registration information includes: the tool registration image, tool name and tool type; If the fourth matching information indicates that the first tool to be identified indicated by the tool entry image is the qualified maintenance tool, the first tool to be identified is determined as an entry maintenance tool and a tool entry time of the first tool to be identified is determined; The tool entry image, the tool entry time, the tool name and the tool type corresponding to the first tool to be identified are registered in the third basic table.

8. The method according to claim 7, characterized in that The departure recognition result includes: a tool departure image; after obtaining the departure recognition result, the method further includes: Matching at least one of the tool departure images with the tool arrival images stored in the third basic table to obtain fifth matching information; If the fifth matching information indicates that the second tool to be identified is the on-site maintenance tool, determining a tool departure time of the second tool to be identified; The tool departure image and the tool departure time corresponding to the second tool to be identified are registered in the third basic table.

9. The method according to claim 8, characterized in that The method further comprises: Determine the personnel entry image, the personnel entry time, the tool entry image and the tool entry time as the current entry information of the nuclear power steam turbine maintenance plan; Determine the personnel departure image, the personnel departure time, the tool departure image and the tool departure time as the current departure information of the nuclear power steam turbine maintenance plan; Determine the target plan identifier, the first personnel identifier, the tool name, the tool type and the foreign matter monitoring result as the current plan information of the nuclear power steam turbine maintenance plan; Recording the current entry information, the current departure information and the current plan information into the fifth basic table and the sixth basic table respectively; Among them, the fifth basic table is used to store the entry information, the departure information and the plan information corresponding to each qualified maintenance personnel; the sixth basic table is used to store the entry information, the departure information and the plan information corresponding to each qualified maintenance tool.

10. A foreign body monitoring device used in nuclear power steam turbine maintenance, characterized in that: The device is arranged outside the workplace where the nuclear power steam turbine is located; the device comprises: a table body and an information collection component arranged on the table body, and a placement area is arranged on the table body; The information collection component is used to identify a first tool to be identified placed in the placement area through the information collection component to obtain an entry identification result, wherein the first tool to be identified is an item carried by a maintenance person when entering the workplace; The information collection component is further used to identify a second tool to be identified placed in the placement area through the information collection component to obtain an off-site identification result, where the second tool to be identified is an item carried by the maintenance personnel when leaving the workplace; The entry recognition result and the departure recognition result are used to determine the foreign object monitoring result.

Images