Superconducting magnet low-temperature control system and application thereof

Abstract

The invention provides a superconducting magnet low-temperature control system which can be applied to the technical field of particle acceleration equipment. The system comprises a client, a middle layer server and an equipment layer, the client is used for providing a human-computer interaction interface for an operator so as to realize the functions of parameter configuration, instruction issuing, real-time data monitoring, intelligent analysis, time sequence data persistent storage, management and analysis of the superconducting magnet low-temperature control system; the middle layer server is used for operating a program of the superconducting magnet low-temperature control system; and the equipment layer is used for collecting related data of operation of the particle accelerator. On-line equipment protection, superconducting coil protection and superconducting power supply protection of the superconducting magnet low-temperature control system are carried out in a soft and hard interlocking combined mode, so that the tedious process of manually controlling low-temperature equipment is avoided; and the aspects of preventing technicians from being radiated by a high-intensity magnetic field during control, the equipment positioning precision, the treatment efficiency and the economic benefits are remarkably improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of particle acceleration equipment, and in particular to a superconducting magnet low-temperature control system and its application. Background Art

[0002] The carbon ion beam is generated by a particle accelerator for tumor treatment. The beam energy is deposited at the end of the range (Bragg peak), causing little damage to healthy tissue along the way. The beam spot has a small divergence and high positioning accuracy. By adjusting the Bragg peak to accurately fall on the tumor target area, the DNA double strand is broken, which can effectively kill tumor cells that are insensitive to conventional radiation. As an advanced radiotherapy technology, it has been widely used in the field of cancer radiotherapy for many years.

[0003] This beam is generated by a particle accelerator. The basic principle of a particle accelerator is to accelerate and focus charged particles using electric and magnetic fields. An accelerator is usually composed of a series of accelerating cavities and magnets. The electric field inside the accelerating cavity generates an electric field gradient, which enables the particles to gain acceleration. The magnet is used to generate a magnetic field, which keeps the particle's trajectory on a stable track. Particle accelerator magnets are divided into conventional magnets and superconducting magnets. Since superconducting magnets can generate a strong confining magnetic field at a relatively small excitation power, the size of the accelerator can be greatly reduced, and the power consumption of the accelerator can be reduced, making superconducting accelerators have great economic and technical advantages.

[0004] Particle accelerator superconducting magnets work in a cryogenic environment (around 4K), usually using liquid helium to provide a critical cryogenic environment. In order to more accurately and conveniently test the quality factor of these superconducting magnets, a complete superconducting magnet cryogenic control system must be developed. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In order to solve the technical problems existing in the operation process of the superconducting magnet of the particle accelerator in the prior art, the embodiments of the present disclosure provide a superconducting magnet low-temperature control system and its application, which performs online equipment protection, superconducting coil protection, and superconducting power supply protection of the superconducting magnet low-temperature control system through a combination of soft and hard interlocking, thereby avoiding the cumbersome process of manually operating the low-temperature equipment. At the same time, it significantly improves the prevention of strong magnetic field radiation to technicians during operation, equipment positioning accuracy, treatment efficiency and economic benefits.

[0007] (II) Technical solution

[0008] In view of the above problems, embodiments of the present disclosure provide a superconducting magnet low temperature control system and applications thereof.

[0009] According to a first aspect of the present disclosure, a superconducting magnet cryogenic control system is provided, comprising: a client, an intermediate layer server and a device layer, wherein the client is used to provide a human-computer interaction interface for an operator to implement parameter configuration, instruction issuance, real-time data monitoring, intelligent analysis, persistent storage of time series data, management and analysis functions of the superconducting magnet cryogenic control system; the intermediate layer server is used to run the program of the superconducting magnet cryogenic control system; and the device layer is used to collect relevant data of the operation of a particle accelerator.

[0010] In some exemplary embodiments, the middle layer server includes a superconducting magnet cryogenic control system server, a quench detection system server, a timing database server and a time synchronization system server, wherein the superconducting magnet cryogenic control system server is used to run a server-side control program, wherein the server-side control program includes a standard protocol data publishing interface driver, which is responsible for monitoring the operating status and data of equipment in different areas of the cryogenic system; the quench detection system server is used to run the standard interface driver and the server program; the timing database server is used to collect, persistently store and manage the timing data with timestamp as the primary key generated during the operation of the control system, and provide a reliable data source for data traceability and correlation analysis; the time synchronization system server is used to provide a unified time base for the entire device, under which it can generate data with timestamps, and provide reliable data support for correlation analysis, troubleshooting and problem location between the data of the entire control system.

[0011] In some exemplary embodiments, the equipment layer includes superconducting magnet cryogenic valve box equipment, normal temperature pipeline side equipment, helium recovery end equipment, superconducting magnet operation terminal side equipment, remote PLC work substation, central CPU processor, signal conversion module, quench detection module and superconducting power supply.

[0012] In some exemplary embodiments, the remote PLC work substation includes a power module, an input / output IO interface module and a communication module, wherein the power module is used to supply power to the remote PLC work substation; the input / output IO interface module is used to collect device layer data and output control instructions; and the communication module is used for data transmission.

[0013] In some exemplary embodiments, the central CPU processor is responsible for receiving data, interlocking logic judgment and output control instructions from the remote PLC work substation; the central CPU processor is responsible for data protocol parsing and data packet processing; and the central CPU processor has a logic judgment function. When the collected low-temperature system environmental parameters are not within the preset state or range, an interlocking first alarm signal is generated, and the communication status can be judged at the same time. If the communication interruption time between the field equipment and the remote PLC work substation is greater than the preset time threshold, a second interlocking alarm signal is generated.

[0014] In some exemplary embodiments, the communication cables between the various devices of the superconducting magnet low-temperature control system include shielded cables, the "strong and weak separation" principle is implemented inside the control system cabinet, the cables outside the cabinet are laid on a dedicated weak current bridge, and an uninterruptible power supply is used inside the control system cabinet.

[0015] In some exemplary embodiments, the software of the superconducting magnet cryogenic control system includes a data source, a communication driver interface, and software business logic, wherein the communication driver interface program obtains data from the data source through the TCP / IP protocol to complete data interaction with the data source.

[0016] In some exemplary embodiments, the communication driver interface includes software service parameter configuration, software communication driver program and software user management, wherein the software service parameter configuration is used to provide server-client communication address parameter configuration and service management; software user management includes engineer mode and debug mode, wherein the user authority in engineer mode is higher than the user authority in debug mode; and in engineer mode, software parameters can be modified, configured and managed.

[0017] In some exemplary embodiments, the software business logic includes configuration management, permission management and logging, timestamp calibration and standard protocol data release, wherein configuration management is responsible for software version management, environment settings and build management; permission management and logging are used to ensure the safe, stable and efficient operation of the software system, wherein permission management prevents malicious behavior and data leakage by controlling user access scope and operation permissions; and logging helps to discover safety hazards and optimize system performance through monitoring, analysis and auditing of system operations to meet compliance requirements; timestamp calibration is used to ensure that the data collected from the superconducting magnet cryogenic control system has a unique primary key to make the data consistent; and standard protocol data release is used to perform protocol conversion on the data packets collected by the superconducting magnet cryogenic control system and publish them with the unified interface standard protocol OPCUA to ensure seamless connection of data access by different clients; the software business logic also includes a human-computer interaction visualization interface, an intelligent data analysis window, real-time alarm and time synchronization functions.

[0018] According to a second aspect of the present disclosure, there is provided an application of the superconducting magnet cryogenic control system described above, which is applied to a particle accelerator treatment device.

[0019] (III) Beneficial effects

[0020] It can be seen from the above technical solutions that the superconducting magnet low temperature control system and its application provided by the embodiments of the present disclosure have at least one of the following beneficial effects:

[0021] (1) It integrates functions such as communication interface driver, data standard protocol release, software environment setting, human-computer interaction interface, real-time fault alarm, persistent storage of time series data and intelligent analysis platform, providing the prerequisite for the normal operation of particle accelerator superconducting magnets, while achieving the goal of miniaturization and integration of treatment devices.

[0022] (2) The online equipment protection, superconducting coil protection, and superconducting power supply protection of the superconducting magnet cryogenic control system are carried out by combining soft and hard interlocking, thus avoiding the cumbersome process of manually operating cryogenic equipment. At the same time, it has significantly improved the protection of technicians from strong magnetic field radiation during operation, equipment positioning accuracy, treatment efficiency, and economic benefits.

[0023] (3) By building an intelligent data analysis platform, we can achieve persistent storage, management and analysis of time series data. The data is archived in a time series database. The core function of the time series database is to efficiently store, query and analyze the time series data of the superconducting magnet cryogenic control system of the particle accelerator treatment device. It can handle large-scale and high-frequency data writing, provide fast query and complex aggregation analysis functions, and support real-time data stream processing, which improves the shortcomings of previous relational databases in the industrial field. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above contents and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0025] Figure 1 The schematic diagram shows the architecture of a superconducting magnet cryogenic control system according to an embodiment of the present disclosure;

[0026] Figure 2 A schematic diagram of a control logic diagram of a lower computer (PLC) of a PLC work substation according to an embodiment of the present disclosure is shown; and

[0027] Figure 3 The software architecture diagram of the superconducting magnet cryogenic control system according to an embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure.

[0029] Figure 1 The schematic diagram shows the architecture of a superconducting magnet cryogenic control system according to an embodiment of the present disclosure.

[0030] like Figure 1 As shown, the superconducting magnet cryogenic control system according to the embodiment of the present disclosure includes a client, an intermediate layer server and a device layer, wherein the client is used to provide a human-computer interaction interface for operators to realize parameter configuration, instruction issuance, real-time data monitoring, intelligent analysis, persistent storage of time series data, management and analysis functions of the superconducting magnet cryogenic control system; the intermediate layer server is used to run the program of the superconducting magnet cryogenic control system; and the device layer is used to collect relevant data of the particle accelerator operation.

[0031] For example, the client is located in the central control room of a superconducting magnet, and multiple clients interact with the low-temperature control system server and the quench detection system server based on OPCUA or other protocols to provide a human-computer interaction interface for operators.

[0032] In the disclosed embodiment, the middle layer server includes a superconducting magnet cryogenic control system server, a quench detection system server, a timing database server and a time synchronization system server, wherein the superconducting magnet cryogenic control system server is used to run a server-side control program, wherein the server-side control program includes a standard protocol data publishing interface driver program, which is responsible for monitoring the operating status and data of equipment in different areas of the cryogenic system; the quench detection system server is used to run the standard interface driver program and the server program; the timing database server is used to collect, persistently store and manage the timing data with timestamp as the primary key generated during the operation of the control system, and provide a reliable data source for data traceability and correlation analysis; the time synchronization system server is used to provide a unified time base for the entire device, under which it can generate data with timestamps, and provide reliable data support for correlation analysis, troubleshooting and problem location between the data of the entire control system.

[0033] In some exemplary embodiments, the equipment layer includes superconducting magnet cryogenic valve box equipment, normal temperature pipeline side equipment, helium recovery end equipment, superconducting magnet operation terminal side equipment, remote PLC work substation, central CPU processor, signal conversion module, quench detection module and superconducting power supply.

[0034] In the disclosed embodiment, the superconducting magnet cryogenic valve box device is a cryogenic device that distributes cryogenic cooling capacity to the superconducting magnet and ensures its normal operation. It is usually composed of a superconducting coil, a cryostat (used to maintain the low temperature environment required for the superconducting coil), a cold material, an electromagnetic suspension support structure, a valve box, and related connections and control systems. Normal temperature pipeline side equipment refers to those devices connected to the normal temperature pipeline for the transportation, control, monitoring and protection of the medium. The helium recovery end equipment is a device specifically used for recovering and processing helium. It can recover, purify and reuse the used helium, thereby improving the utilization rate of helium and reducing costs. The superconducting magnet operation terminal side equipment is a vital component in the superconducting magnet system. They are responsible for ensuring the normal operation of the superconducting magnet, monitoring its status, and providing necessary support and protection. The signal conversion module is an important electronic component that can convert the input signal into another form of signal to meet different application requirements. The quench detection module is an electronic device specifically used to detect whether a superconducting magnet has a quench phenomenon. When a superconducting magnet changes from a superconducting state to a normal state, its resistance increases dramatically, causing the current to drop rapidly and generating a large amount of heat. The quench detection module can monitor the resistance change or current change of the superconducting magnet in real time. When an abnormal change is detected, an alarm signal will be immediately issued so that protective measures can be taken in time. The superconducting power supply is a power supply device specially designed for superconducting equipment, especially superconducting magnets. Since the resistance of superconducting materials drops to zero under specific low temperature conditions, the superconducting power supply needs to be able to provide stable, low-loss current to meet the operating requirements of superconducting equipment.

[0035] In some exemplary embodiments, the remote PLC work substation includes a power module, an input / output IO interface module and a communication module, wherein the power module is used to supply power to the remote PLC work substation; the input / output IO interface module is used to collect device layer data and output control instructions; and the communication module is used for data transmission.

[0036] For example, the input and output IO interface module is mounted on the Siemens ET200SP hardware. Specifically, the Siemens ET200SP is equipped with a DI module, a DQ module, an AI module, an AQ module, a CMPtP module, and a memory card of 12MB.

[0037] In some exemplary embodiments, the central CPU processor is responsible for receiving data, interlocking logic judgment and output control instructions from the remote PLC work substation; the central CPU processor is responsible for data protocol parsing and data packet processing; and the central CPU processor has a logic judgment function. When the collected low-temperature system environmental parameters are not within the preset state or range, an interlocking first alarm signal is generated, and the communication status can be judged at the same time. If the communication interruption time between the field equipment and the remote PLC work substation is greater than the preset time threshold, a second interlocking alarm signal is generated.

[0038] For example, the model of the central CPU processor is 1513-1PN, the processing time of the central CPU processor for bit operations is 25ns, the processing time for word operations is 32ns, and the processing time for floating-point operations is 170ns.

[0039] In some exemplary embodiments, the lower computer program of the PLC workstation includes control system operation status and parameters, interlocking logic protection, control process instructions, and communication driver interface.

[0040] Figure 2 The following schematically shows a control logic diagram of a lower computer (PLC) of a PLC workstation according to an embodiment of the present disclosure.

[0041] like Figure 2 As shown, according to the control logic diagram of the lower computer (PLC) of the PLC work substation of the embodiment of the present disclosure, it can be known that the lower computer (PLC) control program can realize the collection of the operating status and parameters of the superconducting magnet cryogenic control system equipment of the particle accelerator treatment device, and can also listen to the process instructions issued by the client and output them to the cryogenic control system equipment terminal. At the same time, the lower computer (PLC) control program has an interlocking logic judgment function. When the lower computer (PLC) control program scans that the operating status and parameters of the superconducting magnet cryogenic control system are not within the preset value range, the interlocking signal and the first alarm signal are triggered. When the lower computer (PLC) control program recognizes that the helium recovery device of the superconducting magnet cryogenic control system meets the preset saturation, the PLC controller outputs instructions through the IO module, starts the compressor operation, and remotely sends a message to prompt the cryogenic control personnel to confirm. When the superconducting magnet is in a quench state, the quench protection device triggers the IGBT to respond quickly, and the entire system takes less than 50ms to operate, thereby protecting the superconducting coil and the superconducting power supply. In addition, the lower computer program has the function of judging communication faults. If the communication between sub-devices is disconnected, a second alarm signal will be generated and a message will be sent remotely to prompt relevant technical personnel to handle the problem.

[0042] In some exemplary embodiments, shielded cables are used for communication cables between various devices in the superconducting magnet cryogenic control system of a particle accelerator treatment device, the "strong and weak separation" principle is implemented inside the cabinet, cables outside the cabinet are strictly laid on a dedicated weak-current bridge, an uninterruptible power supply (UPS) is used inside the control system cabinet, and the on-site strong and weak-current grounding lines are strictly separated, effectively improving the safety and reliability of the entire system.

[0043] Figure 3 The software architecture diagram of the superconducting magnet cryogenic control system according to an embodiment of the present disclosure is schematically shown.

[0044] like Figure 3 As shown, the superconducting magnet low temperature control system software according to the embodiment of the present disclosure includes a data source, a communication driver interface and software business logic, wherein the communication driver interface program obtains data from the data source through the TCP / IP protocol to complete data interaction with the data source.

[0045] In some exemplary embodiments, the communication driver interface includes software service parameter configuration, software communication driver program and software user management, wherein the software service parameter configuration is used to provide server-client communication address parameter configuration and service management; software user management includes engineer mode and debug mode, wherein the user authority in engineer mode is higher than the user authority in debug mode; and in engineer mode, software parameters can be modified, configured and managed.

[0046] In some exemplary embodiments, the software business logic includes configuration management, permission management and logging, timestamp calibration and standard protocol data publishing, wherein configuration management is responsible for software version management, environment settings and build management; permission management and logging are used to ensure the safe, stable and efficient operation of the software system, wherein permission management prevents malicious behavior and data leakage by controlling user access scope and operation permissions; and logging helps to discover security risks and optimize system performance through monitoring, analysis and auditing of system operations to meet compliance requirements; timestamp calibration is used to ensure that the data collected from the superconducting magnet cryogenic control system has a unique primary key to make the data consistent; and standard protocol data publishing is used to perform protocol conversion on the data packets collected by the superconducting magnet cryogenic control system and publish them with the unified interface standard protocol OPCUA to ensure seamless connection of data access by different clients.

[0047] In some exemplary embodiments, the software business logic also includes a time series database, a human-computer interaction visualization interface, a data intelligent analysis window, a real-time alarm, and a time synchronization function. Among them, the core function of the time series database is to efficiently store, query, and analyze the time series data of the cryogenic control system. It can handle large-scale, high-frequency data writing, provide fast query and complex aggregation analysis functions, and support real-time data stream processing, improving the shortcomings of previous relational databases in the industrial field.

[0048] The embodiments of the present disclosure use a combination of soft and hard interlocking to perform online equipment protection, superconducting coil protection, and superconducting power supply protection for the superconducting magnet cryogenic control system. This solves the cumbersome process of manually controlling cryogenic equipment in the past, and at the same time, significantly improves the protection of technicians from strong magnetic field radiation during operation, equipment positioning accuracy, treatment efficiency, and economic benefits.

[0049] The superconducting magnet low temperature control system according to the embodiment of the present disclosure can be applied to a particle accelerator treatment device.

[0050] The embodiments of the present disclosure are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present disclosure. Although the embodiments are described above, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. Without departing from the scope of the present disclosure, those skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A superconducting magnet low temperature control system, characterized in that: include: The client is used to provide a human-computer interaction interface for operators to realize parameter configuration, instruction issuance, real-time data monitoring, intelligent analysis, persistent storage of time series data, management and analysis functions of the superconducting magnet low-temperature control system; the middle-layer server is used to run the program of the superconducting magnet low-temperature control system; and the device layer is used to collect relevant data of the particle accelerator operation.

2. The superconducting magnet low temperature control system according to claim 1, characterized in that: The intermediate layer servers include a superconducting magnet cryogenic control system server, a quench detection system server, a timing database server and a time synchronization system server. The superconducting magnet cryogenic control system server is used to run a server-side control program, wherein the server-side control program includes a standard protocol data publishing interface driver program, which is responsible for monitoring the operating status and data of equipment in different areas of the cryogenic system; The quench detection system server is used to run a standard interface driver and a server program; The time series database server is used to collect, persistently store and manage the time series data generated during the operation of the control system with timestamp as the primary key, providing a reliable data source for data traceability and correlation analysis; The time synchronization system server is used to provide a unified time base for the entire device. Under the unified time base, it can generate data with timestamps, providing reliable data support for correlation analysis, troubleshooting and problem location among the data of the entire control system.

3. The superconducting magnet low temperature control system according to claim 1, characterized in that: The equipment layer includes superconducting magnet cryogenic valve box equipment, normal temperature pipeline side equipment, helium recovery end equipment, superconducting magnet operation terminal side equipment, remote PLC work substation, central CPU processor, signal conversion module, quench detection module and superconducting power supply.

4. The superconducting magnet low temperature control system according to claim 3, characterized in that: The remote PLC work substation includes a power supply module, an input / output IO interface module and a communication module, wherein the power supply module is used to supply power to the remote PLC work substation; The input / output IO interface module is used to collect the device layer data and output control instructions; and The communication module is used for data transmission.

5. The superconducting magnet low temperature control system according to claim 3, characterized in that: The central CPU processor is responsible for receiving data, interlocking logic judgment and output control instructions from the remote PLC workstation. The central CPU processor is responsible for data protocol analysis and data packet processing; and The central CPU processor has a logical judgment function. When the collected low-temperature system environmental parameters are not in the preset state or range, an interlocking first alarm signal is generated. At the same time, the communication status can be judged. If the communication interruption time between the field equipment and the remote PLC workstation is greater than the preset time threshold, a second interlocking alarm signal is generated.

6. The superconducting magnet low temperature control system according to claim 1, characterized in that: The communication cables between the various devices of the superconducting magnet cryogenic control system include shielded cables. The "strong and weak separation" principle is implemented inside the control system cabinet. The cables outside the cabinet are laid on a dedicated weak current bridge, and an uninterruptible power supply is used inside the control system cabinet.

7. The superconducting magnet cryogenic control system according to any one of claims 1 to 6, characterized in that: The software of the superconducting magnet cryogenic control system includes a data source, a communication driver interface and software business logic. The communication driver interface program obtains data from the data source through the TCP / IP protocol to complete data interaction with the data source.

8. The superconducting magnet low temperature control system according to claim 7, characterized in that: The communication driver interface includes software service parameter configuration, software communication driver program and software user management. Wherein, the software service parameter configuration is used to provide communication address parameter configuration and service management between the server and the client; The software user management includes an engineer mode and a debugging mode, wherein the user authority in the engineer mode is higher than the user authority in the debugging mode; and in the engineer mode, software parameters can be modified, configured and managed.

9. The superconducting magnet low temperature control system according to claim 7, characterized in that: The software business logic includes configuration management, rights management, logging, timestamp calibration, and standard protocol data publishing. The configuration management is responsible for software version management, environment settings and build management; The permission management and log records are used to ensure the safe, stable and efficient operation of the software system, wherein the permission management prevents malicious behavior and data leakage by controlling the user's access scope and operation permissions; and the log records help discover security risks and optimize system performance through monitoring, analysis and auditing of system operations to meet compliance requirements; The timestamp calibration is used to ensure that the data collected from the superconducting magnet cryogenic control system has a unique primary key to ensure data consistency; and the standard protocol data publishing is used to convert the data packets collected by the superconducting magnet cryogenic control system into a protocol and publish them using the unified interface standard protocol OPCUA to ensure seamless access to data by different clients; The software business logic also includes a human-computer interaction visualization interface, a data intelligent analysis window, a real-time alarm and a time synchronization function.

10. An application of the superconducting magnet low temperature control system according to any one of claims 1 to 9, characterized in that: Applied in particle accelerator therapy devices.

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