System and method for positioning flaw detection weld joint of conventional island of nuclear power plant

Abstract

The present invention relates to a system and method for positioning a flaw detection weld joint of a conventional island of a nuclear power plant. The system comprises a BIM system unit, a mobile terminal and an AR positioning unit, wherein the BIM system unit processes a source drawing and performs data matching on a flaw detection weld joint to be positioned, so as to obtain a three-dimensional model; the mobile terminal transmits the three-dimensional model to the AR positioning unit; and the AR positioning unit receives the three-dimensional model of said flaw detection weld joint and compares the three-dimensional model with a real field object, and determines a field position of said flaw detection weld joint on the basis of a comparison result. In the present invention, by means of the BIM system, the source drawing is automatically acquired and matching is performed to obtain the three-dimensional model, and the mobile terminal is used to transmit the three-dimensional model to the AR positioning unit, so that, by means of the AR positioning unit, the three-dimensional model and the field real object can be used to perform comparison and positioning to accurately identify the position of said flaw detection weld joint, the problem of information distortion caused by manual data transmission can be avoided, and the efficiency and accuracy of flaw detection weld joint positioning can also be improved.

Description

A nuclear power plant conventional island flaw welding opening positioning system and method TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear power conventional island pipeline installation, and more particularly to a nuclear power plant conventional island flaw welding opening positioning system and method. BACKGROUND

[0002] At present, the positioning of the flaw welding opening of the nuclear power conventional island still relies on the joint participation of personnel in each process of the pipeline installation process, and is organized through daily on-site handover of the flaw welding opening information from the welding technician to the non-destructive testing operator. The existing method is low in efficiency, low in accuracy and poor in flexibility. Not only is a large amount of manpower consumed, but also information omission and transmission errors are likely to occur when the personnel simultaneously transmit the flaw welding opening information, resulting in information distortion and affecting the accuracy. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a nuclear power plant conventional island flaw welding opening positioning system and method.

[0004] The technical scheme adopted by the present application to solve the technical problem is that a nuclear power plant conventional island flaw welding opening positioning system is constructed, comprising a BIM system unit, a mobile terminal and an AR positioning unit.

[0005] The BIM system unit is used for processing source drawings and matching data of the to-be-positioned flaw welding opening, to obtain a three-dimensional model.

[0006] The mobile terminal communicates with the BIM system and is used for receiving the three-dimensional model of the to-be-positioned flaw welding opening output by the BIM system and transmitting the three-dimensional model to the AR positioning unit.

[0007] The AR positioning unit communicates with the mobile terminal and is used for comparing and positioning the three-dimensional model of the to-be-positioned flaw welding opening with the field object, and determining the field position of the to-be-positioned flaw welding opening according to the comparison result.

[0008] In the nuclear power plant conventional island flaw welding opening positioning system, the BIM system unit comprises:

[0009] A BIM model decomposition module is used for obtaining source drawings corresponding to the to-be-positioned flaw welding opening, and decomposing and transforming the source drawings to obtain three-dimensional data of the to-be-positioned flaw welding opening.

[0010] A flaw welding opening data matching module is connected with the BIM model decomposition module and is used for data matching the to-be-positioned flaw welding opening with the three-dimensional data to obtain the three-dimensional model.

[0011] In the nuclear power plant conventional island flaw welding opening positioning system, the BIM model decomposition module comprises:

[0012] A drawing acquisition module is configured to read the source drawing from a database, wherein the source drawing is a drawing of a three-dimensional model;

[0013] A model decomposition module is connected to the drawing acquisition module and configured to decompose the three-dimensional model to obtain three-dimensional data of the flaw welding opening to be positioned.

[0014] In the nuclear power plant conventional island flaw welding opening positioning system, the flaw welding opening data matching module comprises:

[0015] A number determination module is configured to determine the welding opening code of the flaw welding opening to be positioned;

[0016] A matching module is configured to match the welding opening code of the flaw welding opening to be positioned with the three-dimensional data to determine the position of the flaw welding opening to be positioned on the three-dimensional model;

[0017] A display module is configured to display the flaw welding opening to be positioned and welding opening information on the three-dimensional model according to the position of the flaw welding opening to be positioned on the three-dimensional model.

[0018] In the nuclear power plant conventional island flaw welding opening positioning system, the AR positioning unit comprises AR glasses.

[0019] The AR glasses are in communication with the mobile terminal and configured to compare the three-dimensional model of the flaw welding opening to be positioned with the field object and determine the field position of the flaw welding opening to be positioned according to the comparison result.

[0020] In the nuclear power plant conventional island flaw welding opening positioning system, the AR glasses comprise:

[0021] A data acquisition module is in communication with the mobile terminal and configured to receive the three-dimensional model;

[0022] An image acquisition module is configured to acquire a field image to obtain the field image;

[0023] A positioning module is connected to the data acquisition module and the image acquisition module and configured to compare the three-dimensional model with the field object and determine the field position of the flaw welding opening to be positioned according to the comparison result.

[0024] The application further provides a method for positioning a weld opening for flaw detection in a conventional island of a nuclear power plant.

[0025] The source drawing is processed and the data of the weld opening to be positioned for flaw detection is matched to obtain a three-dimensional model through a BIM system unit.

[0026] The three-dimensional model of the weld opening to be positioned for flaw detection output by the BIM system is received by the mobile terminal and transmitted to an AR positioning unit.

[0027] The three-dimensional model of the weld opening to be positioned for flaw detection is compared with the actual object on site through the AR positioning unit, and the on-site position of the weld opening to be positioned for flaw detection is determined according to the comparison result.

[0028] In the method for positioning a weld opening for flaw detection in a conventional island of a nuclear power plant, the processing of the source drawing and the data matching of the weld opening to be positioned for flaw detection to obtain a three-dimensional model comprises:

[0029] The source drawing corresponding to the weld opening to be positioned for flaw detection is obtained, and the source drawing is transformed and decomposed to obtain three-dimensional data of the weld opening to be positioned for flaw detection.

[0030] The weld opening to be positioned for flaw detection is data-matched with the three-dimensional data to obtain the three-dimensional model.

[0031] In the method for positioning a weld opening for flaw detection in a conventional island of a nuclear power plant, the processing of the source drawing and the data matching of the weld opening to be positioned for flaw detection to obtain a three-dimensional model comprises:

[0032] The source drawing is read from a database; the source drawing is a drawing of a three-dimensional model.

[0033] The three-dimensional model is decomposed to obtain the three-dimensional data of the weld opening to be positioned for flaw detection.

[0034] The weld opening to be positioned for flaw detection is data-matched with the three-dimensional data to obtain the three-dimensional model.

[0035] The weld opening code of the weld opening to be positioned for flaw detection is determined.

[0036] The weld opening code of the weld opening to be positioned for flaw detection is matched with the three-dimensional data to determine the position of the weld opening to be positioned for flaw detection on the three-dimensional model.

[0037] According to the position of the weld opening to be positioned for flaw detection on the three-dimensional model, the weld opening to be positioned for flaw detection and the weld opening information are displayed on the three-dimensional model.

[0038] In the method for positioning a flaw detection welding opening of a conventional island of a nuclear power plant, the step of comparing the three-dimensional model of the flaw detection welding opening to be positioned with the actual object on site and determining the on-site position of the flaw detection welding opening to be positioned according to the comparison result comprises:

[0039] receiving the three-dimensional model;

[0040] collecting the on-site image to obtain the on-site image;

[0041] comparing the three-dimensional model to the actual object on site and determining the on-site position of the flaw detection welding opening to be positioned according to the comparison result.

[0042] The nuclear power plant conventional island flaw detection welding opening positioning system and method have the following beneficial effects: the system comprises a BIM system unit, a mobile terminal and an AR positioning unit; the BIM system unit processes the source drawing and matches the data of the flaw detection welding opening to be positioned to obtain a three-dimensional model; the mobile terminal transmits the three-dimensional model to the AR positioning unit; the AR positioning unit compares the three-dimensional model of the flaw detection welding opening to be positioned to the actual object on site and determines the on-site position of the flaw detection welding opening to be positioned according to the comparison result. The three-dimensional model is obtained by automatically acquiring the source drawing and performing conversion analysis by the BIM system, and the three-dimensional model is transmitted to the AR positioning unit by the mobile terminal, so that the on-site position of the flaw detection welding opening to be positioned can be accurately identified by comparing the three-dimensional model to the actual object on site by the AR positioning unit, which can avoid the problem of information distortion caused by manual data transmission and improve the efficiency and accuracy of the positioning of the flaw detection welding opening. BRIEF DESCRIPTION OF DRAWINGS

[0043] The application will be further described below with reference to the drawings and embodiments. In the drawings:

[0044] Fig. 1 is a principle block diagram of a nuclear power plant conventional island flaw detection welding opening positioning system provided by the application;

[0045] Fig. 2 is a flowchart of a method for positioning a flaw detection welding opening of a nuclear power plant conventional island provided by the application. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the application will be apparently and completely described with reference to the drawings of the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, but not all the embodiments of the application. Based on the embodiments of the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0047] Figure 1 shows a preferred embodiment of the nuclear power plant conventional island flaw detection welding port positioning system provided by the present application. As shown in Figure 1, the nuclear power plant conventional island flaw detection welding port positioning system comprises a BIM system unit 11, a mobile terminal 12 and an AR positioning unit 13.

[0048] Specifically, the BIM system unit 11 is used to process the source drawing and match the data of the to-be-positioned flaw detection welding port to obtain a three-dimensional model; the mobile terminal 12 communicates with the BIM system and is used to receive the three-dimensional model of the to-be-positioned flaw detection welding port output by the BIM system and transmit it to the AR positioning unit 13; the AR positioning unit 13 communicates with the mobile terminal 12 and is used to compare the three-dimensional model of the to-be-positioned flaw detection welding port with the on-site real object and determine the on-site position of the to-be-positioned flaw detection welding port according to the comparison result.

[0049] The present application automatically obtains the source drawing of the three-dimensional model by using the BIM system, and decomposes the three-dimensional model to obtain a three-dimensional model, so as to transmit the three-dimensional model to the AR positioning unit 13 by using the mobile terminal 12. The AR positioning unit 13 compares the three-dimensional model with the on-site real object collected in real time, so as to accurately identify the position of the to-be-positioned flaw detection welding port. This method can improve the efficiency and accuracy of flaw detection welding port positioning, improve the flexibility of positioning detection, save labor cost, and avoid the phenomenon of information distortion caused by information transmission from person to person.

[0050] Specifically, the BIM system is a data tool applied to engineering design, construction and management. By establishing a virtual building engineering three-dimensional model, a complete building engineering information database consistent with the actual situation is provided for the model by using digital technology. The present application realizes rapid data extraction and data conversion processing by using the characteristics of the BIM system. At the same time, data transmission is realized by using the mobile terminal 12, which avoids human error and improves data transmission efficiency. In addition, the present application also realizes natural interaction between the user and the environment by using AR technology, and realizes rapid positioning of the flaw detection welding port.

[0051] Specifically, in the present embodiment, the BIM system unit 11 comprises a BIM model decomposition module 111 and a flaw detection welding port data matching module 112.

[0052] The BIM model decomposition module 111 is used to obtain the source drawing corresponding to the to-be-positioned flaw detection welding port, and to decompose and transform the source drawing to obtain the three-dimensional data of the to-be-positioned flaw detection welding port.

[0053] In the embodiment, the BIM model decomposition module 111 comprises: a drawing acquisition module, the drawing acquisition module being configured to read source drawings from a database; and a model decomposition module, the model decomposition module being connected to the drawing acquisition module and configured to decompose a three-dimensional model to obtain three-dimensional data of a weld to be positioned for flaw detection. In the embodiment, the three-dimensional data can include, but is not limited to, pipe segment information, weld information, and the like.

[0054] Specifically, the source drawings of the weld to be positioned for flaw detection are read out in the BIM system by the drawing acquisition module, and a three-dimensional model is obtained. Then, the three-dimensional model is decomposed by the model decomposition module, so that a three-dimensional decomposition diagram of the weld to be positioned for flaw detection can be obtained. In the three-dimensional decomposition diagram, pipe segment information, weld information, and the like can be displayed.

[0055] The flaw detection weld data matching module 112 is connected to the BIM model decomposition module 111 and is configured to match the weld to be positioned for flaw detection with three-dimensional data to obtain a three-dimensional model.

[0056] In the embodiment, the flaw detection weld data matching module 112 comprises: a number determination module, the number determination module being configured to determine the weld code of the weld to be positioned for flaw detection; a matching module, the matching module being configured to match the weld code of the weld to be positioned for flaw detection with three-dimensional data to determine the position of the weld to be positioned for flaw detection on the three-dimensional model; and a display module, the display module being configured to display the weld to be positioned for flaw detection and weld information on the three-dimensional model according to the position of the weld to be positioned for flaw detection on the three-dimensional model.

[0057] Specifically, after the three-dimensional model is decomposed by the model decomposition module, the weld code of the weld to be positioned for flaw detection (i.e., the weld number of the weld to be positioned for flaw detection) is determined by the number determination module. Then, the weld code of the weld to be positioned for flaw detection is matched with three-dimensional data, so that the specific position of the weld to be positioned for flaw detection on the three-dimensional model can be determined. After the specific position of the weld to be positioned for flaw detection on the three-dimensional model is determined, the three-dimensional model is displayed on the display module of the BIM system. At this time, the weld to be positioned for flaw detection and related information (such as size, position, and the like) are displayed on the three-dimensional model.

[0058] In this embodiment, in order to improve the intelligence and digitization of positioning, and at the same time avoid the data transmission errors caused by human factors, the present application uses a mobile terminal 12 to complete the data transmission between the BIM system and the AR positioning unit 13. The mobile terminal 12 is a mobile terminal 12 (such as a mobile phone, a platform, etc.) of the NICE nuclear power intelligent construction platform. A special APP is arranged on the mobile terminal 12, the special APP is connected with the corresponding interface of the BIM system to realize data interaction, so as to import the three-dimensional model of the to-be-positioned flaw detection weld shown in the BIM system into the special APP, and transmit the three-dimensional model to the AR positioning unit 13 by the special APP. In this embodiment, the NICE nuclear power intelligent construction platform is an intelligent system for realizing online and digital transfer of construction production business in the whole range.

[0059] In this embodiment, the AR positioning unit 13 includes AR glasses. The AR glasses communicate with the mobile terminal 12, and are used to compare the three-dimensional model of the to-be-positioned flaw detection weld with the real object on site, and determine the on-site position of the to-be-positioned flaw detection weld according to the comparison result.

[0060] The AR glasses include a data acquisition module, an image acquisition module, and a positioning module. The data acquisition module communicates with the mobile terminal 12 and is used to receive the three-dimensional model. The image acquisition module is used to collect the on-site image and obtain the on-site image. The positioning module is connected with the data acquisition module and the image acquisition module respectively, and is used to compare the three-dimensional model with the real object on site, and determine the on-site position of the to-be-positioned flaw detection weld according to the comparison result.

[0061] Specifically, the AR glasses are connected with the special APP of the mobile terminal 12 for communication. The three-dimensional model imported on the special APP of the mobile terminal 12 is directly transmitted to the AR glasses, and the AR glasses display the received three-dimensional model in the glasses. The AR glasses are worn by the on-site weld flaw detection personnel. By comparing the three-dimensional model of the to-be-positioned flaw detection weld shown by the three-dimensional model in the AR glasses with the collected real object (i.e. the on-site scene), the to-be-positioned flaw detection weld can be quickly and accurately identified and positioned.

[0062] Referring to FIG. 2, FIG. 2 shows a nuclear power plant conventional island flaw detection weld positioning method provided by the present application. The nuclear power plant conventional island flaw detection weld positioning method is applied to the nuclear power plant conventional island flaw detection weld positioning system provided by the present application to realize quick and accurate positioning of the to-be-positioned flaw detection weld.

[0063] Specifically, as shown in FIG. 2, the nuclear power plant conventional island flaw detection weld positioning method includes the following steps:

[0064] Step S201. The source drawing is processed by the BIM system unit 11, and the to-be-positioned flaw detection weld data is matched to obtain a three-dimensional model.

[0065] In the embodiment of the present application, the BIM system, Building Information Modeling, is a data tool applied to engineering design, construction and management. The system provides a complete building engineering information database for the model consistent with the actual situation through establishing a virtual building engineering three-dimensional model by using digital technology. The present application realizes rapid data extraction and data conversion processing by using the characteristics of the BIM system. At the same time, data transmission is realized by using the mobile terminal 12, which avoids human error and improves data transmission efficiency. In addition, the present application realizes natural interaction between the user and the environment by using AR technology, and realizes rapid positioning of the welding joint.

[0066] Specifically, in the embodiment, the source drawing is processed and matched with the data of the welding joint to be positioned to obtain the three-dimensional model, which includes: obtaining the source drawing corresponding to the welding joint to be positioned, and decomposing and converting the source drawing to obtain the three-dimensional data of the welding joint to be positioned; and matching the welding joint to be positioned with the three-dimensional data to obtain the three-dimensional model.

[0067] In the embodiment, the source drawing corresponding to the welding joint to be positioned is obtained, and the source drawing is decomposed and converted to obtain the three-dimensional data of the welding joint to be positioned, which includes: reading the source drawing from the database; and decomposing the three-dimensional model to obtain the three-dimensional data of the welding joint to be positioned.

[0068] In the embodiment, the welding joint to be positioned is matched with the three-dimensional data to obtain the three-dimensional model, which includes: determining the welding joint code of the welding joint to be positioned; matching the welding joint code of the welding joint to be positioned with the three-dimensional data to determine the position of the welding joint to be positioned on the three-dimensional model; and displaying the welding joint to be positioned and the welding joint information on the three-dimensional model according to the position of the welding joint to be positioned on the three-dimensional model.

[0069] Step S202. The three-dimensional model of the welding joint to be positioned output by the BIM system is received by the mobile terminal 12 and transmitted to the AR positioning unit 13.

[0070] In the embodiment, the mobile terminal 12 is a mobile terminal 12 (such as a mobile phone, a platform, etc.) of the NICE nuclear power intelligent construction platform. A special APP is arranged on the mobile terminal 12. The special APP is connected with the corresponding interface of the BIM system to realize data interaction, so as to import the three-dimensional model of the welding joint to be positioned displayed in the BIM system into the special APP, and transmit the three-dimensional model to the AR positioning unit 13 by the special APP. In the embodiment, the NICE nuclear power intelligent construction platform is an intelligent system realizing online and digital transfer of the whole range of construction production business.

[0071] Step S203. The three-dimensional model of the welding joint to be positioned is compared with the on-site object by the AR positioning unit 13, and the on-site position of the welding joint to be positioned is determined according to the comparison result.

[0072] In this embodiment, receiving the three-dimensional model of the welding joint to be positioned and comparing the three-dimensional model with the on-site object, and determining the position of the welding joint to be positioned according to the comparison result include: receiving the three-dimensional model; collecting the on-site image to obtain the on-site object; comparing the three-dimensional model with the on-site object, and determining the on-site position of the welding joint to be positioned according to the comparison result.

[0073] The nuclear power plant conventional island welding joint positioning method of the present application can automatically obtain a three-dimensional model by using a BIM system, and decompose the three-dimensional model to obtain a three-dimensional model, so as to transmit the three-dimensional model to the AR positioning unit 13 by using the mobile terminal 12. The AR positioning unit 13 can accurately identify the on-site position of the welding joint to be positioned by comparing the three-dimensional model with the on-site object image collected in real time. This method can improve the efficiency and accuracy of the welding joint positioning, and improve the flexibility of the positioning detection. It can not only save labor costs, but also avoid the phenomenon of information distortion caused by the transmission of information from person to person.

[0074] The present application establishes a logical system of BIM model, welding joint and AR equipment by using a BIM system, and a supporting desktop and mobile terminal management system, realizes fast data acquisition, accurate transmission and accurate positioning of the welding joint, realizes data intercommunication between the system and the personnel, and realizes virtual and real welding joint precision.

[0075] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0076] The skilled person can further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware, computer software or a combination of the two. In order to clearly show the interchangeability of hardware and software, the composition and steps of each example have been described in the above description. Whether the functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person 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 application.

[0077] The steps of a method or algorithm described in connection with the embodiments disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside in random access memory (RAM), flash memory, read-only memory (ROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0078] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it accordingly, and cannot limit the protection scope of the present application. Any equivalent changes and modifications made within the scope of the claims of the present application shall belong to the scope of the claims of the present application.

Claims

1. A nuclear power plant conventional island inspection weld opening positioning system, characterized by, The application relates to a BIM system unit, a mobile terminal and an AR positioning unit. The BIM system unit is used for processing source drawings and matching data of a to-be-positioned flaw detection welding opening, so as to obtain a three-dimensional model. The mobile terminal communicates with the BIM system and is used for receiving the three-dimensional model of the to-be-positioned flaw detection welding opening output by the BIM system and transmitting the three-dimensional model to the AR positioning unit. The AR positioning unit communicates with the mobile terminal and is used for comparing and positioning the three-dimensional model of the to-be-positioned flaw detection welding opening and a field object, and determining the field position of the to-be-positioned flaw detection welding opening according to a comparison result. The BIM system unit comprises:

2. The nuclear power plant conventional island in-service inspection weld landing pad positioning system of claim 1, wherein, A BIM model decomposition module is used for acquiring source drawings corresponding to a to-be-positioned flaw detection welding opening, and transforming and decomposing the source drawings to obtain three-dimensional data of the to-be-positioned flaw detection welding opening. A flaw detection welding opening data matching module is connected with the BIM model decomposition module and is used for matching data of the to-be-positioned flaw detection welding opening and the three-dimensional data to obtain the three-dimensional model. The BIM model decomposition module comprises:

3. The nuclear power plant conventional island in-service inspection weld landing pad positioning system of claim 2, wherein, A drawing acquisition module is used for reading the source drawings from a database; the source drawings are drawings of a three-dimensional model. A model decomposition module is connected with the drawing acquisition module and is used for decomposing the three-dimensional model to obtain the three-dimensional data of the to-be-positioned flaw detection welding opening. The flaw detection welding opening data matching module comprises:

4. The nuclear power plant conventional island in-service inspection weld landing pad positioning system of claim 2, wherein, A number determination module is used for determining a welding opening code of the to-be-positioned flaw detection welding opening. A matching module is used for matching the welding opening code of the to-be-positioned flaw detection welding opening with the three-dimensional data to determine the position of the to-be-positioned flaw detection welding opening on the three-dimensional model. A display module is used for displaying the to-be-positioned flaw detection welding opening and welding opening information on the three-dimensional model according to the position of the to-be-positioned flaw detection welding opening on the three-dimensional model. The AR positioning unit comprises AR glasses.

5. The nuclear power plant conventional island in-service inspection weld landing pad positioning system of claim 1, wherein, The AR glasses communicate with the mobile terminal, are used for comparing the three-dimensional model of the to-be-positioned flaw detection welding opening with a field object, and determining the field position of the to-be-positioned flaw detection welding opening according to a comparison result. The AR glasses comprise:

6. The nuclear power plant conventional island in-service inspection weld landing pad positioning system of claim 5, wherein, A data acquisition module communicates with the mobile terminal and is used for receiving the three-dimensional model. An image acquisition module is used for collecting field images to obtain the field object. A positioning module is connected with the data acquisition module and the image acquisition module and is used for comparing and positioning the three-dimensional model and the field object, and determining the field position of the to-be-positioned flaw detection welding opening according to a comparison result. The application comprises the following steps:

7. A method for positioning a weld opening for inspection of a conventional island of a nuclear power plant, applied to the system for positioning a weld opening for inspection of a conventional island of a nuclear power plant according to any one of claims 1 to 6, characterized in that, Processing source drawings and matching data of a to-be-positioned flaw detection welding opening by a BIM system unit to obtain a three-dimensional model; Receiving the three-dimensional model of the to-be-positioned flaw detection welding opening output by the BIM system by a mobile terminal and transmitting the three-dimensional model to an AR positioning unit. ​ The AR positioning unit compares the three-dimensional model of the to-be-positioned flaw detection weld with the on-site object, and determines the on-site position of the to-be-positioned flaw detection weld according to the comparison result.

8. The method of claim 7, wherein, The processing of the source drawing and the matching of the to-be-positioned flaw detection weld data to obtain the three-dimensional model include: Obtaining the source drawing corresponding to the to-be-positioned flaw detection weld, and decomposing and transforming the source drawing to obtain three-dimensional data of the to-be-positioned flaw detection weld; Matching the to-be-positioned flaw detection weld with the three-dimensional data to obtain the three-dimensional model.

9. The method of claim 8, wherein, The obtaining of the source drawing corresponding to the to-be-positioned flaw detection weld and the decomposing and transforming of the source drawing to obtain the three-dimensional data of the to-be-positioned flaw detection weld include: Reading the source drawing from a database; the source drawing is a drawing of a three-dimensional model; Decomposing the three-dimensional model to obtain the three-dimensional data of the to-be-positioned flaw detection weld; The matching of the to-be-positioned flaw detection weld with the three-dimensional data to obtain the three-dimensional model includes: Determining the weld code of the to-be-positioned flaw detection weld; Matching the weld code of the to-be-positioned flaw detection weld with the three-dimensional data to determine the position of the to-be-positioned flaw detection weld on the three-dimensional model; Displaying the to-be-positioned flaw detection weld and weld information on the three-dimensional model according to the position of the to-be-positioned flaw detection weld on the three-dimensional model.

10. The method of claim 7, wherein the method is used for a nuclear power plant conventional island weld inspection. The comparison and positioning of the three-dimensional weld model of the to-be-positioned flaw detection weld with the on-site object, and the determination of the on-site position of the to-be-positioned flaw detection weld according to the comparison result include: Receiving the three-dimensional model; Collecting on-site images to obtain the on-site object; Comparing and positioning the three-dimensional weld model with the on-site object, and determining the on-site position of the to-be-positioned flaw detection weld according to the comparison result.

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