A method, system and device for controlling access to a nuclear power plant or a nuclear implementation health access

Abstract

The present application relates to nuclear power plant, nuclear implementation access control technical field, disclose a kind of nuclear power plant or nuclear implementation health access control method, system and equipment, through face recognition automatic allocation locker cubicle and associate EPD code, cancel card and manual receiving and sending link, avoid risk of certificate loss, impersonation and foreign matter, reduce labor cost;Through work clothes and EPD fixed state detection, realize access mandatory check, improve radiation safety;Control area entrance uses verification information fast traffic, simplify process, improve traffic efficiency, especially adapt to overhaul peak scene;Synchronous detection personnel and EPD are used by integrated contamination monitoring, reduce monitoring equipment and traffic time, reduce personnel radiation exposure;When returning, through EPD code and face information accurate opening locker cubicle, realize EPD automatic homing management, whole process unattended, no contact operation, give consideration to safety, economy and traffic efficiency.

Description

Technical Field

[0001] This invention relates to the field of nuclear power plant and nuclear facility access control technology, specifically to a method, system and equipment for controlling the sanitary access points of a nuclear power plant or nuclear facility. Background Technology

[0002] The radiation control area of ​​nuclear power plants and nuclear facilities is the core area for radioactive operations. Personnel and equipment must go through a dedicated sanitary entrance and exit to complete procedures such as identity verification, changing clothes, wearing an electronic personal dosimeter (EPD), and radioactive contamination monitoring to ensure the radiation safety of personnel and the environment.

[0003] Existing nuclear power plants or nuclear facility health entrances and exits generally adopt the traditional model of multiple cards + manual management + separate monitoring: before entering, personnel need to obtain an identity card, locker key and EPD, which are registered and issued by designated personnel; lockers in cold changing rooms are opened with keys, and EPDs are centrally stored and manually issued; entrance gates require card swiping or manual operation to verify identity; when leaving the radiation control area, personnel must pass two tests, namely the whole body surface gamma contamination monitor and the whole body surface beta contamination monitor, and can only leave after passing the test.

[0004] This traditional technology has the following inherent drawbacks: (1) Multiple cards, keys, and EPDs need to be manually issued and received, requiring a large number of on-duty personnel, resulting in high labor costs and congestion during peak hours. During the overhaul of nuclear power plants, the flow of people and materials in and out of the radiation control area is extremely busy, and the speed of the flow of people and materials in and out of the radiation control area seriously restricts the progress of the overhaul of nuclear power plants. (2) There are many cards and keys, which are easy to lose, get confused, be borrowed or impersonated. In critical scenarios such as refueling in the nuclear island, the loss of cards can easily cause foreign objects to fall into the reactor, threatening the safety of the unit. (3) When personnel enter the heated changing room, they put down the EPD while putting on their work clothes. This can easily lead to confusion, damage from falling, and failure to verify whether the EPD is worn or whether the work clothes are properly worn before entering the radiation control area. This poses a safety hazard of not wearing the EPD properly or entering the control area without wearing the EPD. (4) The use of split-type γ and β contamination monitoring equipment results in a large number of devices, a large space occupation, and a complicated two-time monitoring process, which increases the time personnel spend in the radiation control area. (5) The entrance uses contact card swiping and manual operation, which can easily cause cross-infection of viruses. In addition, the information verification steps are numerous and the passage speed is slow, which cannot meet the requirements of efficient, safe and unmanned operation of nuclear power plants.

[0005] Current patents related to nuclear power plant access control primarily focus on single access improvement measures such as combining card readers with facial recognition and multi-factor authentication. They fail to provide a comprehensive, systemic solution encompassing cardless, fully self-service processes, integrated EPD and locker systems, wristband coding linkage, integrated contamination monitoring, and mandatory wear-based access control. These solutions cannot fundamentally address the aforementioned safety, efficiency, cost, and management issues. Therefore, there is an urgent need for a nuclear power plant or nuclear safety access control technology that simplifies processes, reduces risks, improves efficiency, and enables unmanned operation, to meet the high-efficiency and safety requirements of daily operation and major overhauls of nuclear power plants. Summary of the Invention

[0006] This invention provides a method, system, and equipment for controlling the sanitary entrances and exits of nuclear power plants or nuclear facilities, in order to solve the problems of low efficiency and high safety risks of traditional control methods.

[0007] In a first aspect, the present invention provides a method for controlling sanitary access points to nuclear power plants or nuclear facilities, the method comprising: In response to a user entering the cold locker room, the system acquires and recognizes the first facial information, allocates locker compartments based on the first facial information, associates the locker compartment code and EPD code with the first facial information, and places the EPD in a preset position within the locker compartment. In response to a user bringing an EPD into the heated changing room, the system detects whether the user is wearing work clothes and fixes the EPD in a preset position on the work clothes. If the user wears the work clothes and fixes the EPD in the preset position on the work clothes, the verification and identification information at the entrance of the control area will be obtained, and the door at the entrance of the control area will be opened according to the verification and identification information; In response to the user's departure signal, the entrance door of the contamination monitoring equipment is opened, and radioactivity detection is performed on the user and EPD simultaneously. If the detection is qualified, the exit door of the contamination monitoring equipment is opened, allowing the user to enter the cold changing room. In response to a user entering the cold changing room from the contamination monitoring device, the system obtains the EPD code and second facial information, and opens the corresponding locker compartment based on the EPD code or second facial information. The system then detects that the EPD is placed back in the preset position in the locker compartment and the locker compartment door is closed.

[0008] The present invention provides a method for controlling the health entrances and exits of nuclear power plants or nuclear facilities. This method automatically allocates locker compartments and associates them with EPD codes through facial recognition, eliminating the need for cards and manual issuance / receiving, avoiding risks of lost documents, impersonation, and foreign objects, and reducing labor costs. By combining work clothes and EPD status detection with facial recognition, mandatory access verification is achieved, improving radiation safety. The control area entrance uses contactless (image or access control information) verification for rapid passage, simplifying processes and improving efficiency, especially suitable for peak overhaul scenarios. Integrated contamination monitoring simultaneously detects personnel and EPDs, reducing monitoring equipment and passage time, and lowering personnel radiation exposure. Upon return, compartments are precisely opened using EPD codes or facial information, achieving automatic EPD return management. The entire process is unattended and contactless, balancing safety, economy, and efficiency.

[0009] In one alternative implementation, the EPD includes a wristband with Velcro and snap fasteners. When a user enters a heated changing room, they wear the EPD while putting on their work clothes. After the work clothes are put on, the Velcro on the wristband is used to fix the EPD in a preset position on the work clothes to avoid confusion or forgetting the EPD.

[0010] In one optional implementation, an EPD base is provided at a preset position in the locker compartment. When the EPD is placed on the EPD base, it is charged and transmits information.

[0011] In one alternative implementation, the EPD has a built-in access card for opening locker compartment doors or entrance doors to contamination monitoring devices.

[0012] The present invention provides a method for controlling the sanitary entrances and exits of nuclear power plants or nuclear facilities. Through an EPD (Electronic Device for Disposal) wristband and Velcro / buckle structure, the EPD can be quickly and easily fixed to a predetermined position on the wrist and work clothes, effectively preventing the EPD from being contaminated, dropped, or confused when handled, thus improving ease of use and safety. An EPD base is installed in the locker compartment, enabling automatic charging and information transmission, eliminating the need for centralized storage cabinets and dedicated personnel, saving space and labor costs. The EPD has a built-in access card, allowing direct opening of locker compartment doors and contamination monitoring equipment entrances, eliminating the need for traditional keys and cards, avoiding the risks of loss, impersonation, and foreign objects, achieving contactless, self-service access control, simplifying the entire process and increasing operational efficiency.

[0013] In one optional implementation, obtaining verification and identification information at the entrance of the control area, and opening the door at the entrance of the control area based on the verification and identification information, includes: The current user's facial information and the EPD code carried by the current user are obtained using the recognition terminal at the entrance of the control area. Obtain face information, EPD code (or obtain the EPD code through an EPD access control) and the wearing position of EPD at one time by using image information, and conduct consistency check between these information and the information entered into the system after the personnel completes the wearing of work clothes. If the check is consistent, the door at the entrance of the control area will be opened.

[0014] The invention provides a management and control method for a sanitary entrance and exit of a nuclear power plant or a nuclear facility, which synchronously collects face information, the EPD code in the locker compartment door and the locker compartment code through an identification terminal at the entrance of the control area, performs multiple consistency checks, realizes accurate identity verification, effectively prevents impostors from entering the radiation control area without qualification, and strengthens the access control of the radiation control area; non-contact information collection is adopted, no card swiping or manual operation is required, which reduces the risk of cross-infection and improves the passage speed; multiple information prompts the locker compartment door code, and various methods can open the locker compartment, which is convenient for personnel to quickly open and close the locker compartment; full-process automatic judgment and opening and closing realize efficient, safe and non-inductive passage, and greatly improve the reliability and operation efficiency of entrance and exit management and control.

[0015] In an alternative embodiment, performing radioactivity detection on the user and the EPD includes: Synchronously perform gamma radioactive contamination detection and beta radioactive contamination detection on the user's whole body surface and the EPD surface, and judge whether the gamma radioactivity intensity and the beta radioactivity intensity exceed the standard; If the gamma radioactivity intensity exceeds the standard or the beta radioactivity intensity exceeds the standard, the detection is unqualified; If the gamma radioactivity intensity does not exceed the standard and the beta radioactivity intensity does not exceed the standard, the detection is qualified.

[0016] The invention provides a management and control method for a sanitary entrance and exit of a nuclear power plant or a nuclear facility, which adopts a synchronous detection method to simultaneously perform gamma and beta radioactive contamination monitoring on the whole body surface of a person and the surface of an EPD, completes double contamination judgment at one time, greatly shortens the monitoring time compared with the traditional step-by-step detection, and improves the passage efficiency of personnel exiting the area; synchronous monitoring can comprehensively check the contamination risk of human body and equipment, prevent radioactive pollution from being brought out of the radiation control area, and ensure radiation safety; the integrated judgment logic is clear and responds quickly, which reduces the number and occupied space of monitoring equipment, reduces the operation and maintenance cost, and at the same time realizes automatic interception for unqualified items and smooth release for qualified items.

[0017] In an alternative embodiment, if the result of the radioactivity detection on the user and the EPD is unqualified, the entrance door of the contamination monitoring device will be opened, so that the user returns to decontaminate the body surface (or EPD) and then returns to the contamination monitoring device for detection again until the result of the radioactivity detection on the user and the EPD is qualified.

[0018] The present invention provides a method for controlling the sanitary entrances and exits of nuclear power plants or nuclear facilities. When radioactivity detection fails, the entrance door of the contamination monitoring equipment is automatically opened, guiding personnel back for decontamination. This forms a closed-loop control system of detection, failure, interception, decontamination, re-inspection, and release upon passing, preventing radioactive contamination from leaving the radiation control area at the source and significantly improving the level of radiation safety protection. The entire process requires no manual intervention or operation, automatically intercepting and guiding re-inspection, achieving mandatory, closed-loop, and unattended exit control. This effectively avoids the risk of contamination spread and ensures the safe operation of the nuclear power plant and the health of personnel.

[0019] Secondly, the present invention provides a control system for sanitary access points of nuclear power plants or nuclear facilities, the system comprising: The cold locker room recognition and processing module is used to respond to a user entering the cold locker room, acquire and recognize the first facial information, allocate locker compartments according to the first facial information, associate the locker compartment code and EPD code with the first facial information, and place the EPD in a preset position in the locker compartment. The heated changing room monitoring module is used to respond to users carrying EPDs into the heated changing room, detect whether the users are wearing work clothes properly, and fix the EPDs in the preset position of the work clothes; The entrance detection module is used to obtain the verification and identification information at the entrance of the control area if the user is wearing work clothes and fixing the EPD in the preset position of the work clothes, and to open the door at the entrance of the control area based on the verification and identification information; The contamination monitoring module is used to open the entrance door of the contamination monitoring equipment in response to the user's departure signal and to perform radioactivity detection on the user and EPD. If the detection is qualified, the exit door of the contamination monitoring equipment is opened to allow the user to enter the cold changing room. The locker reset monitoring module is used to respond to a user entering the cold locker room from the contamination monitoring device, obtain the EPD code and second facial information, open the corresponding locker compartment according to the EPD code or second facial information, detect that the EPD is put back in the preset position of the locker compartment and the locker compartment door is closed.

[0020] Thirdly, the present invention provides an electronic device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the method described in the first aspect or any corresponding embodiment thereof.

[0021] Fourthly, the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to perform the method described in the first aspect or any corresponding embodiment thereof. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of an application scenario according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the first process of a method for controlling the sanitary entrances and exits of a nuclear power plant or nuclear facility according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a second process for controlling the sanitary entrances and exits of a nuclear power plant or nuclear facility according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the hardware equipment used in the control method for sanitary access points of a nuclear power plant or nuclear facility according to an embodiment of the present invention. Figure 5 This is a flowchart illustrating a specific embodiment of a method for controlling sanitary access points to nuclear power plants or nuclear facilities according to an embodiment of the present invention; Figure 6 This is a structural block diagram of a control system for the sanitary entrances and exits of a nuclear power plant or nuclear facility according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] It is understood that before using the technical solutions disclosed in the various embodiments of the present invention, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in the present invention and their authorization should be obtained in accordance with relevant laws and regulations through appropriate means.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] As an optional application scenario of this invention, such as Figure 1 As shown, the control system for the sanitary access points of the nuclear power plant or nuclear facility may include at least one terminal device and at least one server. Figure 1 The system is illustrated in the example, which includes a computer 101, a mobile terminal 102, and a server 103, and the terminal devices such as the computer 101 and the mobile terminal 102 are connected to the server 103 through a network 110.

[0028] Specifically, the terminal device can be a smartphone, tablet, laptop, PDA, desktop computer, game console, smart TV, smart wearable device, in-vehicle terminal, VR (Virtual Reality) device, AR (Augmented Reality) device, etc. Server 103 can be a standalone physical server, a server cluster, a distributed system, or a cloud server providing cloud services. Network 110 can be a wired or wireless network, examples of which include, but are not limited to, the Internet, corporate intranet, local area network, wide area network, mobile communication network, and combinations thereof.

[0029] Personnel and material flow into and out of the radiation control area of ​​a nuclear power plant (nuclear facility) must be through a dedicated sanitary entrance / exit to facilitate the inspection and maintenance of equipment within the radiation control area. Previously, the sanitary entrance / exit design for nuclear power plants or facilities involved multiple cards: one for obtaining locker keys in the cold changing room, and another for verifying the identity of personnel entering the radiation control area. Having multiple cards made them prone to loss and confusion, and could lead to impersonation, especially during refueling operations in the nuclear island, increasing the risk of foreign objects falling into the reactor. Furthermore, personnel had to manually operate the gates (triangular gates) to enter, increasing the risk of disease transmission. Manual operation also slowed down the flow of personnel. After passing through the gates (triangular gates), it was impossible to control whether personnel were wearing protective clothing, carrying EPDs (Enhanced Physical Detectors), or whether the EPDs were in place, allowing personnel free access to the control area. Furthermore, personnel carry EPDs when entering and exiting the radiation control area; when putting on and taking off work clothes, they need to put down the EPDs. When there are many people, EPDs are easily confused or forgotten, and there is also the possibility of hands getting EPDs contaminated or EPDs getting hands contaminated. The centralized collection and distribution of keys and EPDs requires a certain number of staff, increasing the labor costs of the nuclear power plant. When personnel leave the radiation control area, they need to be monitored twice through two different contamination monitoring devices. The increase in equipment occupies space at the sanitary entrance and exit, and the two monitoring times reduce the number of personnel passing through the sanitary entrance and exit, thus limiting the progress of the nuclear power plant overhaul.

[0030] To address the aforementioned issues, this invention provides a method for controlling the health entrances and exits of nuclear power plants or nuclear facilities. This method automatically assigns locker compartments and associates them with EPD codes through facial recognition, enabling dual contactless verification of facial recognition and EPD codes at the entrance, simultaneous monitoring of γ / β radioactive contamination, and closed-loop re-inspection of non-compliance. This approach aims to improve personnel access efficiency, strengthen radiation safety control, and reduce construction and operating costs.

[0031] According to an embodiment of the present invention, a method for controlling the sanitary access points of a nuclear power plant or nuclear facility is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0032] This embodiment provides a method for controlling the sanitary access points of a nuclear power plant or nuclear facility, which can be used in the aforementioned computer system. Figure 2 This is a flowchart of a method for controlling sanitary access points to nuclear power plants or nuclear facilities according to embodiments of the present invention, such as... Figure 2 As shown, the process includes the following steps: Step S201: In response to a user entering the cold changing room, the system acquires and identifies the first facial information, allocates a locker compartment based on the first facial information, associates the locker compartment code and EPD code with the first facial information, and places the EPD in a preset position within the locker compartment.

[0033] Specifically, current technology requires users to carry multiple cards when entering and exiting nuclear power plants or nuclear health entrances. One card is used to obtain locker keys in the cold changing room, and another card is used to verify the identity of personnel entering the radiation control area. Multiple cards are prone to loss and confusion. Therefore, facial recognition equipment is installed in the cold changing room. When a user enters the cold changing room, the facial recognition equipment collects the user's first facial information and combines it with stored personal information to identify the user. After verification, a locker compartment is assigned to the user, and the locker compartment door is automatically opened. The locker compartment code is displayed on the facial recognition terminal. The user finds the corresponding locker compartment according to the locker compartment code, places their home clothes in the locker compartment, retrieves the EPD (Electronic Device Disposal) from a preset location inside the locker compartment, and then closes the locker compartment. Based on the locker compartment door closing signal, the locker compartment code, the first facial information, and the EPD code are associated.

[0034] Step S202: In response to the user carrying the EPD into the heated changing room, detect whether the user is wearing the work clothes and fix the EPD in the preset position of the work clothes.

[0035] Specifically, after entering the heated changing room with the EPD on their wrist, users do not need to remove the EPD to put on their work clothes, thus avoiding confusion. They can put on their work clothes in the heated changing room. The outer surface of the work clothes has a preset position for fixing the EPD. Users can use Velcro on their wrist to fix the EPD to the preset position on the work clothes, ensuring that the EPD is always on the user, avoiding forgetting, dropping or getting confused, making it convenient to put on and take off work clothes, and also preventing hands and EPD from getting dirty through interaction.

[0036] Step S203: If the user wears the work clothes and fixes the EPD in the preset position of the work clothes, the verification and identification information at the entrance of the control area is obtained, and the door at the entrance of the control area is opened according to the verification and identification information.

[0037] Specifically, after the user puts on the work clothes and fixes the EPD in the preset position on the work clothes, they leave the hot changing room and arrive at the entrance of the control area. The camera simultaneously and imperceptibly obtains facial recognition information and EPD code (the code can be obtained from the image on the wristband or its access control information). On the one hand, the user's identity and permissions are determined by facial information detection, and on the other hand, it is detected whether the EPD code on the work clothes and the facial information are consistent with the information associated with the cold changing room. If they are consistent, the verification is passed and the door at the entrance of the control area, such as a fence gate or a triangular gate, is automatically opened.

[0038] In step S204, in response to the user's departure signal, the entrance door of the contamination monitoring equipment is opened, and the user and EPD are subjected to radioactivity detection. If the detection is qualified, the exit door of the contamination monitoring equipment is opened, allowing the user to enter the cold changing room.

[0039] After completing their work within the controlled area, the user leaves the controlled area, removes the EPD from their work clothes in the designated area, puts the EPD on their wrist, takes off their work clothes, places it in the designated location, and then uses the EPD to open the entrance door of the contamination monitoring equipment. Inside the contamination monitoring equipment, the contamination monitor is used to conduct radioactivity detection on the user's body surface and the EPD. If the detection is qualified, the exit door of the contamination monitoring equipment is opened, and the user enters the cold changing room.

[0040] Step S205: In response to the user entering the cold changing room from the contamination monitoring device, the EPD code is obtained, and the corresponding locker compartment is opened according to the EPD code. The EPD is then detected to be placed back in the preset position of the locker compartment and the locker compartment door is closed.

[0041] Specifically, the user, wearing an EPD on their wrist, enters the cold locker room through the contamination detection device. Based on the EPD's code, they locate the associated locker compartment and use the EPD to open it. The user then places the EPD back in its preset position within the compartment, retrieves their personal clothing, and closes the locker door. The locker closure signal, EPD reset information, and access control information are automatically uploaded to the server, and the locker compartment returns to its initial state.

[0042] In addition to using EPD codes to find the associated locker compartments, a second facial information can be obtained using a facial recognition terminal. This second facial information is then uploaded to the server, and the intelligent management system central hub unlocks the locker compartment code associated with the second facial information and displays it on the facial recognition terminal. This is just an example, but not a limitation.

[0043] The control method for nuclear power plant or nuclear facility health entrances and exits provided in this embodiment automatically allocates locker compartments and associates them with EPD codes through facial recognition, eliminating the need for cards and manual issuance and receipt, avoiding risks of lost documents, impersonation, and foreign objects, and reducing labor costs; it achieves mandatory access verification through work clothes and EPD fixed status detection, improving radiation safety; the control area entrance uses verification information for rapid passage, simplifying the process and improving passage efficiency, especially suitable for peak overhaul scenarios; it adopts integrated contamination monitoring to simultaneously detect personnel and EPDs, reducing monitoring equipment and passage time, and reducing personnel radiation exposure; upon return, locker compartments are accurately opened through EPD codes or facial information, achieving automatic EPD return management, with unattended and contactless operation throughout the process, balancing safety, economy, and passage efficiency.

[0044] This embodiment provides a method for controlling the sanitary access points of a nuclear power plant or nuclear facility, which can be used in the aforementioned computer system. Figure 3 This is a flowchart of a method for controlling sanitary access points to nuclear power plants or nuclear facilities according to embodiments of the present invention, such as... Figure 3 As shown, the process includes the following steps: Step S301: In response to a user entering the cold changing room, the system acquires and recognizes the first facial information, allocates a locker compartment based on the first facial information, associates the locker compartment code and EPD code with the first facial information, and places the EPD in a preset position within the locker compartment. For details, please refer to [link to details]. Figure 2 Step S201 of the illustrated embodiment will not be described again here.

[0045] In some optional implementations, an EPD base is provided at a preset position in the locker compartment, and when the EPD is placed on the EPD base, the EPD is charged and transmits information.

[0046] Specifically, an EPD base is installed in a pre-designed location within each locker compartment. The EPD is an electronic radiation monitoring device that personnel in the nuclear power plant's radiation control area must wear at all times to monitor the radiation dose received by the human body and the EPD surface in real time. Placing the EPD in the locker compartment ensures that users put it on immediately upon entering the nuclear power plant entrance, facilitating timely monitoring. To ensure the effectiveness of the EPD, a pre-designed EPD base is provided in each locker compartment. When not in use, the EPD is placed on the base for continuous charging and data transmission.

[0047] Each locker compartment is equipped with an access control system and an EPD (Electronic Device Display), eliminating the centralized sending and receiving of EPDs; EPD information transmission and locker compartment opening and closing are controlled via the network and centrally controlled by the intelligent management system.

[0048] Step S302: In response to the user carrying the EPD into the heated changing room, detect whether the user is wearing the work clothes and fix the EPD in the preset position of the work clothes.

[0049] In some alternative implementations, the EPD includes a wristband with Velcro and snap fasteners. When a user enters the heated changing room, the user uses the snap fasteners or Velcro on the wristband to attach the EPD to their wrist and put on their work clothes directly. After putting on the work clothes, the user uses the Velcro on the wristband to fix the EPD in a preset position on the work clothes.

[0050] Specifically, the EPD device is fixed to a wristband equipped with Velcro and snaps for easy removal and wearing, reducing contamination, confusion, and drops. After removing their home clothes in the cold changing room, users wear the EPD on their wrists using the snaps and enter the hot changing room. Inside the hot changing room, after putting on their work clothes, users use the Velcro on the wristband to secure the EPD to a pre-set position on their work clothes, such as the chest area, facilitating real-time monitoring of the radiation dose received by the user's body surface and the EPD surface.

[0051] In addition, the wristband is marked with the locker compartment code, and each locker compartment contains an EPD (Electronic Power Disposal Device). Therefore, the locker compartment code (i.e., the wristband code) corresponds one-to-one with the EPD code, allowing users to quickly find their locker compartment based on the code and improving passage speed. The work clothes must meet radiation protection requirements and be compatible with the wristband and EPD, ensuring the EPD is securely worn and easy to remove.

[0052] In some alternative implementations, the EPD has a built-in access card for opening locker compartment doors or entrance doors to contamination monitoring devices.

[0053] Specifically, the EPD integrates a built-in access card, combining the card used to open the locker compartment door and the entrance door to the contamination monitoring equipment into one unit. Users no longer need to exchange their cards for keys to the locker compartment doors; they can open the locker compartment doors independently, allowing for self-service, automation, and mandatory access to the controlled area. This reduces staff requirements and increases throughput. The access card can also connect to a server to upload information while protecting privacy.

[0054] If it is inconvenient to embed the access card in the EPD device, the access card can also be embedded in the wristband corresponding to the EPD.

[0055] The method for controlling the health entrances and exits of nuclear power plants or nuclear facilities provided in this embodiment utilizes an EPD (Electronic Device Disposal) wristband with Velcro and snap fasteners to quickly and easily secure the EPD to a preset position on the wrist and work clothes, effectively preventing EPD contamination, drops, and confusion, thus improving ease of use and safety. An EPD base is installed in the locker compartment for automatic charging and information transmission, eliminating the need for centralized storage cabinets and dedicated personnel, saving space and labor costs. The EPD has a built-in access card that can directly open locker compartment doors and contamination monitoring equipment entrance doors, eliminating the need for traditional keys and cards, avoiding the risks of loss, impersonation, and foreign objects, achieving contactless, self-service access control, simplifying the entire process and increasing operational efficiency.

[0056] Step S303: If the user puts on the work clothes and fixes the EPD in the preset position of the work clothes, the verification and identification information at the entrance of the control area is obtained, and the door at the entrance of the control area is opened according to the verification and identification information.

[0057] Specifically, step S303 includes: Step S3031: Use the recognition terminal at the entrance of the control area to obtain the current user's facial information and the EPD code carried by the current user.

[0058] Specifically, the identification terminal at the entrance of the controlled area can simultaneously acquire the EPD code and the user's facial information to prevent unauthorized entry.

[0059] Step S3032: Perform a consistency check between the current user's facial information, the EPD code carried by the current user, and the preset personnel information. If they match, open the door at the entrance of the control area.

[0060] Specifically, when facial recognition and EPD recognition confirm that the current user matches the preset personnel information, and the user is wearing work clothes and EPD, the door at the entrance of the controller will be opened automatically to prevent the EPD from being missed or the work clothes from being not fully worn when entering the control area, thus ensuring the user's radiation safety.

[0061] This example provides a method for controlling the health entrances and exits of nuclear power plants or nuclear facilities. It simultaneously collects facial information and EPD codes from locker compartments via an entrance identification terminal, performing dual consistency verification to achieve accurate identity verification and effectively prevent security risks such as impersonation, unauthorized entry, and EPD confusion. The contactless information collection eliminates the need for manual operation, reducing the risk of cross-contamination and infection, and improving passage speed. Multiple locker compartment information prompts and various methods for opening locker compartments facilitate quick positioning and entry to designated compartments. Multiple information consistency comparisons ensure that only authorized personnel carrying the designated EPD in the correct fixed position are allowed entry, strengthening access control in radiation control areas. Fully automated judgment and door opening achieve efficient, safe, and seamless passage, significantly improving the reliability and operational efficiency of entrance and exit control.

[0062] In step S304, in response to the user's departure signal, the entrance door of the contamination monitoring equipment is opened, and the user and EPD are subjected to radioactivity detection. If the detection is qualified, the exit door of the contamination monitoring equipment is opened, allowing the user to enter the cold changing room.

[0063] Specifically, step S304 includes: Step S3041: Simultaneously perform gamma radioactivity contamination detection and beta radioactivity contamination detection on the user's entire body surface and EPD surface to determine whether the gamma radioactivity intensity and beta radioactivity intensity exceed the standard.

[0064] Step S3042: If the intensity of gamma radioactivity exceeds the standard or the intensity of beta radioactivity exceeds the standard, the test is considered unqualified.

[0065] Step S3043: If the gamma radioactivity intensity does not exceed the standard and the beta radioactivity intensity does not exceed the standard, then the test is qualified.

[0066] Specifically, after leaving the radiation control area, the user removes the EPD from their work clothes and wears it on their wrist. Using the access card built into the EPD, they open the entrance door of the contamination monitoring equipment and enter. The contamination monitor simultaneously monitors the user's skin and the EPD for gamma and beta radiation, determining whether the gamma and beta radiation levels exceed the limits. If both are within limits, the exit door of the contamination monitoring equipment opens, and the user leaves. If either gamma or beta radiation exceeds the limit, the entrance door of the contamination monitoring equipment opens, the user returns, cleans their skin, and returns to the equipment for monitoring again, until both gamma and beta radiation levels are within limits. Then, the exit door opens, and the user leaves. The access information from the EPD (or wristband) and the monitoring information from the contamination monitoring equipment can also be uploaded to a central computer for future reference.

[0067] The whole-body surface gamma contamination monitor and whole-body surface beta contamination monitor will be cancelled, and a new type of whole-body surface gamma and beta monitor will be installed to directly monitor the whole-body surface gamma and beta contamination of workers wearing wristbands and EPDs. This will ensure that the radioactivity of workers and EPDs meets the standard requirements when leaving the control area, reduce the number of contamination monitoring devices and the space occupied, reduce the monitoring time of personnel, and improve the passage speed through health entrances and exits.

[0068] The contamination monitoring equipment combines two types of contamination monitoring equipment into one, reducing monitoring time, improving traffic capacity, and lowering the operation and maintenance costs of nuclear power plant units; it also reduces the number of devices, reduces the cost of the space occupied by the devices, and lowers the unit capacity cost of nuclear power plant units.

[0069] The control method for health entrances and exits of nuclear power plants or nuclear facilities provided in this example adopts a synchronous detection approach, simultaneously monitoring gamma and beta radioactive contamination on the entire body surface of personnel and the EPD surface, completing dual contamination determination in one go. Compared with traditional step-by-step detection, it significantly shortens the monitoring time and improves the efficiency of personnel passage out of the area. Synchronous monitoring can comprehensively screen for the risk of contamination of human body and equipment, prevent radioactive contamination from being carried out of the radiation control area, and ensure radiation safety. The integrated judgment logic is clear and the response is rapid, reducing the number of monitoring devices and the space occupied, reducing operation and maintenance costs, while realizing automatic interception of unqualified and smooth release of qualified ones.

[0070] In some optional implementations, if the results of the radioactivity testing on the user and EPD are unqualified, the entrance door of the contamination monitoring equipment is opened, allowing the user to return for surface decontamination and then return to the contamination monitoring equipment for testing again, until the results of the radioactivity testing on the user and EPD are qualified.

[0071] The method for controlling the sanitary entrances and exits of nuclear power plants or nuclear facilities provided in this embodiment automatically opens the entrance door of the contamination monitoring equipment when radioactivity detection fails, guiding personnel back for decontamination. This forms a closed-loop control system of detection, failure, interception, decontamination, re-inspection, and release upon passing, preventing radioactive contamination from leaving the radiation control area at the source and significantly improving the level of radiation safety protection. The entire process requires no manual intervention or operation, automatically intercepting and guiding re-inspection, achieving mandatory, closed-loop, and unattended exit control. This effectively avoids the risk of contamination spread and ensures the safe operation of the nuclear power plant and the health of personnel.

[0072] Step S305: In response to a user entering the cold changing room from the contamination detection device, the system acquires the EPD code and second facial information, opens the corresponding locker compartment based on the EPD code or second facial information, detects that the EPD is returned to its preset position in the locker compartment, and closes the locker compartment door. For details, please refer to [link to details]. Figure 2 Step S205 of the illustrated embodiment will not be described again here.

[0073] To implement the nuclear power plant or nuclear power plant health access control method provided in this embodiment, it is necessary to improve the hardware equipment at the nuclear power plant entrances and exits, such as... Figure 4 The diagram shows the hardware system upon which this embodiment relies. The intelligent management system is centrally located on the system's core server, deployed in a central control room or dedicated computer room. It serves as the control and data processing center for the entire system, uniformly receiving and processing data uploaded from various terminal devices (facial recognition, access control, monitoring devices, lockers); storing and associating personnel information, EPD codes, locker codes, access control records, and contamination monitoring data; and issuing control commands such as unlocking, opening, and monitoring activation to achieve fully automated management and control of the entire process.

[0074] Facial recognition terminals are located at the entrance of the cold locker room for personnel identity verification; at the entrance gate / triangular gate of the control area, they are used for personnel identity + EPD information consistency verification. Facial information is collected and compared with the server's personnel database to complete identity verification; combined with EPD coding, dual verification is achieved to prevent impersonation and unauthorized entry. Smart lockers are located inside the cold locker room, arranged in cubicles. Each cubicle is an independent storage unit, containing a new type of EPD. Each cubicle has a preset EPD placement location and a wristband for easy access; the EPD base automatically charges, synchronizes data, and monitors the status of the placed EPD.

[0075] The entrance gate / triangular gate is located between the heated changing room and the radiation control area. It serves as an access control point for the controlled area and is used to integrate a facial recognition / EPD wristband coding recognition terminal to collect facial and EPD coding information. It receives instructions from the central control center and automatically opens the gate only when both verifications are successful; otherwise, it remains locked. This enables mandatory control of access to the controlled area, ensuring that only authorized personnel carrying a matching EPD can enter.

[0076] The new C3 door (new full-body surface gamma and beta contamination monitor) is located between the exit of the radiation control area and the cold changing room. It is the last checkpoint for contamination monitoring upon exiting the area. The integrated access control equipment receives EPD access card information and opens the entrance door; it simultaneously detects gamma and beta radioactive contamination on the entire body surface of personnel and the EPD surface to determine whether it exceeds the standard; if the test is qualified, the exit door is opened, allowing personnel to enter the cold changing room; if the test is unqualified, the entrance door is opened, guiding personnel back for decontamination and retesting; the monitoring data is uploaded to the central control in real time to form a complete contamination record.

[0077] like Figure 5 The diagram illustrates a specific implementation of control measures at the entrances and exits of a modified nuclear power plant, including entry and exit procedures. The entry procedure includes: Step a: Staff enter the cold changing room, triggering the system to start.

[0078] Step b: The system obtains the first facial information through the facial recognition terminal, compares it with the personnel database on the server, and verifies the legitimacy of the identity.

[0079] Step c: After successful verification, the system automatically assigns a unique locker compartment, generates a compartment code and a built-in EPD code, and associates the facial information, compartment code, and EPD code. It then sends an unlocking command to open the corresponding locker compartment door and uploads the information to the central server.

[0080] Step d: Staff remove their everyday clothes, take out the EPD wristband from the cubicle, and close the locker cubicle door.

[0081] Step e: The staff puts the EPD wristband on their wrist using the snap fastener and starts the EPD device.

[0082] Step f: Staff enter the heated changing room.

[0083] Step g: Staff members put on special protective clothing for nuclear power plants.

[0084] Step h: The staff attaches the EPD wristband to the preset position on the front of the work uniform using Velcro.

[0085] Step i: Staff enter the radiation control zone entrance.

[0086] Step j: The recognition terminal at the entrance of the control area synchronously collects the current facial information and the EPD wristband code. The server performs a double consistency check to confirm that the information of the person and the EPD matches the corresponding information on the server.

[0087] Step k: After the verification is successful, the system opens the triangular gate, allowing staff to enter the radiation control area (step l) to perform their work tasks.

[0088] The process of leaving the area includes: Step m: After completing their work, the staff leaves the radiation control area.

[0089] Step n: Staff members remove their work clothes in the heated changing room and put the EPD wristband back on their wrists.

[0090] Step o: Staff enter the C3 contamination monitoring gate area.

[0091] Step δ: C3 door simultaneously conducts γ and β radioactive contamination detection on the entire surface of the staff and the EPD surface to determine whether the radioactivity level exceeds the standard.

[0092] If the test is passed: the system opens exit C3, and staff enter the cold changing room; If the test fails: the system opens the C3 gate entrance and guides the staff back to the decontamination area for surface and EPD decontamination treatment. After treatment, the staff re-enters the C3 gate for testing until the test is passed.

[0093] Step p: Qualified personnel wearing EPD wristbands return to the cold locker room.

[0094] Step q (optional r): The system uses EPD wristband access card recognition (or secondary facial recognition) to compare with the associated information on the server to verify the identity and ownership of the EPD.

[0095] Step s: After successful verification, the system opens the corresponding locker compartment door, and the staff places the EPD back into the EPD base inside the compartment to complete charging and data synchronization.

[0096] Step t: Staff put on their usual clothes and close the locker compartment door.

[0097] Step u: Staff leave the cold changing room, completing the full process control for entering and exiting the radiation control area.

[0098] This embodiment also provides a control system for the sanitary access points of a nuclear power plant or nuclear facility. This system is used to implement the above embodiments and preferred embodiments, and details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the system described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0099] This embodiment provides a nuclear power plant or nuclear facility health access control system, such as... Figure 6 As shown, it includes: The cold locker room recognition and processing module 601 is used to respond to a user entering the cold locker room, acquire and recognize the first face information, allocate locker compartments according to the first face information, associate the locker compartment code and EPD code with the first face information, and place the EPD in a preset position in the locker compartment.

[0100] The heated changing room monitoring module 602 is used to detect whether the user is wearing work clothes properly and fix the EPD in a preset position on the work clothes when the user enters the heated changing room with the EPD.

[0101] The entrance detection module 603 is used to obtain the verification and identification information at the entrance of the control area if the user is wearing work clothes and fixing the EPD in the preset position of the work clothes, and to open the door at the entrance of the control area according to the verification and identification information.

[0102] The contamination monitoring module 604 is used to open the entrance door of the contamination monitoring equipment in response to the user's departure signal, and simultaneously perform radioactivity detection on the user and EPD. If the detection is qualified, the exit door of the contamination monitoring equipment is opened to allow the user to enter the cold changing room.

[0103] The locker reset monitoring module 605 is used to respond to a user entering the cold locker room from the contamination monitoring device, obtain the EPD code and second facial information, open the corresponding locker compartment according to the EPD code or second facial information, detect that the EPD is put back in the preset position of the locker compartment and the locker compartment door is closed.

[0104] In some alternative implementations, the entry detection module 603 includes: The identification information acquisition unit is used to acquire the current user's facial information and the EPD code carried by the current user using the identification terminal at the entrance of the control area.

[0105] The consistency detection unit is used to check the consistency between the current user's facial information, the EPD code carried by the current user, and the preset personnel information. If the check is consistent, the door at the entrance of the control area is opened.

[0106] In some alternative implementations, the contamination monitoring module 604 includes: The pollution data acquisition unit is used to simultaneously detect gamma-ray and beta-ray contamination on the user's entire body surface and EPD surface, and to determine whether the gamma-ray and beta-ray intensity exceeds the standard.

[0107] The non-compliance determination unit is used to determine whether a test is non-compliant if the gamma radioactivity intensity or beta radioactivity intensity exceeds the standard.

[0108] The qualification determination unit is used to determine that if the gamma radioactivity intensity does not exceed the standard and the beta radioactivity intensity does not exceed the standard, the test is qualified.

[0109] The nuclear power plant or nuclear facility health access control system provided in this embodiment of the invention can execute the nuclear power plant or nuclear facility health access control method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects for executing the method. Further functional descriptions of the above modules and units are the same as in the corresponding embodiments described above, and will not be repeated here.

[0110] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention.

[0111] The following is a detailed reference. Figure 7 This diagram illustrates a suitable structural schematic for implementing an electronic device according to embodiments of the present invention. The electronic device may include a processor (e.g., a central processing unit, graphics processor, etc.) 701, which can perform various appropriate actions and processes based on a program stored in read-only memory (ROM) 702 or a program loaded from memory 708 into random access memory (RAM) 703. The RAM 703 also stores various programs and data required for the operation of the electronic device. The processor 701, ROM 702, and RAM 703 are interconnected via a bus 704. An input / output (I / O) interface 705 is also connected to the bus 704.

[0112] Typically, the following devices can be connected to I / O interface 705: input devices 706 including, for example, touchscreens, touchpads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; output devices 707 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; memory devices 708 including, for example, magnetic tapes, hard disks, etc.; and communication devices 709. Communication device 709 allows electronic devices to exchange data via wireless or wired communication with other devices. Although Figure 7 Electronic devices with various devices are shown, but it should be understood that it is not required to implement or have all of the devices shown, and more or fewer devices may be implemented or have instead.

[0113] In particular, according to embodiments of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program carried on a non-transitory computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device 709, or installed from a memory 708, or installed from a ROM 702. When the computer program is executed by the processor 701, it performs the functions defined in the method for controlling the sanitary access points of a nuclear power plant or nuclear facility according to embodiments of the present invention.

[0114] Figure 7The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of the present invention.

[0115] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that the computer, processor, microprocessor controller, or programmable hardware includes storage components capable of storing or receiving software or computer code. When the software or computer code is accessed and executed by the computer, processor, or hardware, the method for controlling the sanitary access points of a nuclear power plant or nuclear facility shown in the above embodiments is implemented.

[0116] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for controlling sanitary entrances and exits of a nuclear power plant or nuclear facility, characterized in that, Said method comprises: in response to a user entering a cold changing room, acquiring and identifying first face information, allocating a locker compartment according to the first face information, associating the locker compartment code and the EPD code with the first face information, wherein the EPD is placed at a preset position of the locker compartment; in response to a user carrying the EPD entering a hot changing room, detecting whether the user has put on work clothes properly and fixed the EPD at a preset position of the work clothes; if the user has put on work clothes properly and fixed the EPD at the preset position of the work clothes, acquiring verification identification information at an entrance of a control area, and opening a door at the entrance of the control area according to the verification identification information; in response to a leaving signal of the user, opening an entrance door of contamination monitoring equipment, performing radioactive detection on the user and the EPD simultaneously, if the detection is qualified, opening an exit door of the contamination monitoring equipment to allow the user to enter the cold changing room; in response to the user entering the cold changing room from the contamination monitoring equipment, acquiring the EPD code and second face information, opening the corresponding locker compartment according to the EPD code or the second face information, and detecting that the EPD is put back to the preset position of the locker compartment and a door of the locker compartment is closed.

2. The method according to claim 1, characterized in that, The EPD comprises a wrist strap, wherein a hook and loop fastener and a hidden buckle are arranged on the wrist strap; when the user carries the EPD into the hot changing room, the EPD is strapped on the user's wrist by means of the hidden buckle of the wrist strap, and after the user puts on the work clothes properly, the EPD is fixed at the preset position of the work clothes by means of the hook and loop fastener of the wrist strap.

3. The method according to claim 1 or 2, characterized in that, An EPD base is arranged at the preset position of the locker compartment, and when the EPD is placed on the EPD base, charging and information transmission are performed for the EPD.

4. The method according to claim 1, characterized in that, Said acquiring verification identification information at an entrance of a control area, and opening a door at the entrance of the control area according to the verification identification information comprises: acquiring current user face information and an EPD code carried by the current user by means of an identification terminal at the entrance of the control area; performing consistency check on the current user face information and the EPD code carried by the current user with preset personnel information, and if the check is consistent, opening the door at the entrance of the control area.

5. The method according to claim 1, characterized in that, An access control card is built in the EPD and is used for opening a locker compartment door or an entrance door of the contamination monitoring equipment.

6. The method according to claim 1, characterized in that, Said performing radioactive detection on the user and the EPD comprises: synchronously performing gamma radioactive contamination detection and beta radioactive contamination detection on the whole body surface of the user and the surface of the EPD, and judging whether gamma radioactivity intensity and beta radioactivity intensity exceed standards; if the gamma radioactivity intensity exceeds the standard or the beta radioactivity intensity exceeds the standard, the detection is unqualified; if the gamma radioactivity intensity does not exceed the standard and the beta radioactivity intensity does not exceed the standard, the detection is qualified.

7. The method according to claim 6, characterized in that, if the result of radioactive detection on the user and the EPD is unqualified detection, the entrance door of the contamination monitoring equipment is opened to allow the user to return for surface decontamination, and then return to the contamination monitoring equipment for detection again until the result of radioactive detection on the user and the EPD is qualified detection.

8. A control system for sanitary entrances and exits of a nuclear power plant or nuclear facility, characterized in that, Said system comprises: a cold changing room identification processing module, configured to, in response to a user entering a cold changing room, acquire and identify first face information, allocate a locker compartment according to the first face information, associate the locker compartment code and the EPD code with the first face information, wherein the EPD is placed at a preset position of the locker compartment; The heated changing room monitoring module is used to detect whether the user is wearing work clothes properly and fix the EPD in a preset position on the work clothes when the user enters the heated changing room with an EPD. The entrance detection module is used to obtain verification and identification information at the entrance of the control area if the user is wearing work clothes and fixing the EPD in a preset position on the work clothes, and to open the door at the entrance of the control area according to the verification and identification information. The contamination monitoring module is used to open the entrance door of the contamination monitoring equipment in response to the user's departure signal and to simultaneously perform radioactivity detection on the user and EPD. If the detection is qualified, the exit door of the contamination monitoring equipment is opened to allow the user to enter the cold changing room. The locker reset monitoring module is used to respond to a user entering the cold locker room from the contamination monitoring device, obtain the EPD code and second facial information, open the corresponding locker compartment according to the EPD code or second facial information, detect that the EPD is put back in the preset position of the locker compartment and the locker compartment door is closed.

9. An electronic device, characterized in that, include: A memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, the processor executing the computer instructions to perform the method of any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the method of any one of claims 1 to 7.

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