WO2016145738A1 - 一种基于虚拟上位机的数控系统 - Google Patents
一种基于虚拟上位机的数控系统 Download PDFInfo
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/409—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by using manual data input [MDI] or by using control panel, e.g. controlling functions with the panel; characterised by control panel details or by setting parameters
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Definitions
- the invention belongs to the technical field of numerical control systems, and particularly relates to a numerical control system based on a virtual upper computer.
- CNC machine tool is a flexible, high-performance, high-precision automatic machine tool that can solve complex, precise, small-volume, multi-variety parts processing problems. It is generally composed of CNC system, machine tool body and other auxiliary devices. .
- the numerical control system is the core of the whole CNC machine tool. It integrates the position (track), speed and torque control. It performs some or all of the numerical control functions according to the code instructions to realize the motion control of one or more mechanical devices.
- the general numerical control system is composed of an input/output device, a numerical control device, a programmable controller (PLC), a servo system, a detection feedback device, etc., wherein the numerical control device is the center of the numerical control system.
- PLC programmable controller
- the numerical control device may include a display module, an input/output module, a decoder, a motion planner, an axis motion controller, a memory, and the like.
- the display module is an important medium for human-computer interaction, which provides an intuitive operating environment for the user;
- the input/output module is an interface for data and information exchange between the numerical control device and the outside world, including numerical control machining programs, control parameters, compensation amounts, etc.
- the interface module of the device and the servo drive system is mainly responsible for position control; the memory is responsible for storing information such as part processing program, system configuration parameters and system inherent data.
- the software and hardware systems of mainstream high-end CNC systems at home and abroad are mostly upper and lower machine structures: the upper computer is responsible for the system non-real-time tasks, and the lower computer is responsible for the system real-time motion control and logic control tasks.
- the application of the upper and lower machine structure in the field of numerical control is very mature, and its communication and control are relatively easy to implement.
- the numerical control system based on the upper and lower position machine structure has the distributed characteristics, and supports the user's secondary research and development and independent upgrade to a certain extent.
- the upper computer and the lower computer are generally installed next to the machine tool, and each is equipped with an industrial computer.
- the two industrial computers are connected by bus or network and realize communication, as shown in Fig. 2.
- the traditional upper and lower machine architecture makes the intelligent system of numerical control system difficult to adapt to the increasingly complex manufacturing process, which forms the main bottleneck of the development of numerical control system to intelligent and digital, and brings great performance for improving the performance of numerical control system. difficult.
- the applicant's prior patent application CN104298175A discloses a numerical control system based on virtualization technology, which comprises a local numerical control device and a remotely located server, which is interconnected with a local numerical control device network for
- the numerical control system provides high-end value-added function services, such as fast programming, data acquisition and processing, G code quality analysis and optimization, etc., and can also undertake some non-real-time tasks in the traditional upper and lower machine numerical control system, such as decoding, processing simulation, Input/pre-processing, etc.;
- the server and the numerical control device are interconnected by a remote desktop client installed on the numerical control device, the client running on the numerical control device system, which enables the operator to be in the numerical control device by using virtual technology
- the human interaction device performs virtual operations on the server to realize remote operation control of the server, and the two cooperate to realize the use of the intelligent software service and the numerical control processing control.
- the technical solution adopts the idea of a remote server, and provides a high-end intelligent function service for the numerical control system by setting a remote server, and can also transfer some non-real-time functions of the traditional numerical control system upper computer to a remote server for processing, thereby improving the numerical control.
- the numerical control system in the above scheme is actually a traditional upper and lower machine architecture, which only adds a server for it, provides third-party services for the numerical control system, and does not break through the traditional architecture.
- this kind of architecture can make the numerical control system have certain expansion ability in function, it still has many defects: First, most of the calculations related to processing (such as interpolation, speed planning, etc.) are still done locally.
- HMI Human Machine Interaction Unit
- the present invention provides a numerical control system based on a virtual upper computer, which realizes a virtual upper computer by setting a numerical control system upper computer in a virtual machine manner in a remote server.
- the new design of the upper and lower machine structure of the numerical control system solves the problems of data processing capability, HMI function expansion and remote processing limitation of the current numerical control system.
- a numerical control system based on a virtual upper computer which utilizes a virtualization technology to set a host computer in a virtual machine manner in a remote server to form a virtual upper computer, and utilizes the virtual upper computer.
- the position machine and the local lower position machine (hereinafter referred to as the local lower position machine) are configured to form a new upper and lower machine structure, and use the interaction of the two to complete the machine tool machining control, wherein the numerical control system mainly comprises setting on the remote server.
- the virtual upper computer, the local numerical control system lower computer, and the human-computer interaction device for human-computer interaction, the virtual upper computer and the human-machine interaction device, and the virtual upper computer and the local lower-level computer pass Internet connection;
- the human-machine interaction device is configured to provide a human-computer interaction input/output interface, and the numerical control machining instruction is input through the human-machine interaction device; the human-computer interaction module for realizing human-computer interaction is integrated on the virtual upper computer; a non-real-time/semi-real-time task execution unit that performs numerical control processing of non-real-time/semi-real-time tasks (such as decoding, offline speed planning), and a lower-level machine control unit for controlling machine tool processing, the virtual upper computer passes the
- the human-computer interaction module receives the numerical control machining instruction input by the human-machine interaction device, and processes the non-real-time/semi-real-time task execution unit to form a machine tool control instruction, and then transmits the control data to the network through the lower computer control unit to the control unit.
- the underground position machine receives the control data provided by the virtual upper computer, thereby controlling the machine tool to perform real-time motion control and logic control.
- the invention utilizes virtualization technology to deploy the human-computer interaction module to the virtual machine of the remote server to form a virtual upper computer, so as to replace the traditional local numerical control system upper computer, and interact with the local numerical control system lower computer through the network, and build based on Virtualization technology's new CNC system upper and lower machine architecture breaks the traditional CNC system software and hardware system to improve the system's processing performance and function, simplify local CNC equipment, and greatly weaken the CNC system service capability and production cost. The contradiction between them reduces the difficulty of maintenance of the CNC system in the workshop and the production cost of the enterprise.
- a remote desktop client is integrated in the human-computer interaction device, and information interaction can be performed with a remote desktop server integrated in the remote server.
- the interface displayed by the human-machine interaction device is a virtual interface, which is generated by the human-computer interaction device by retrieving the desktop image information of the upper computer from the virtual upper computer, which is essentially a virtual upper computer desktop. Copy of.
- the number of virtual upper computers in the single remote server may be multiple to correspond to a plurality of local lower computers, so that a single remote server can simultaneously serve multiple local lower computers.
- the same numerical control system can be provided with a plurality of human-machine interaction devices, which are respectively connected to the virtual upper computer through a network to provide a human-computer interaction interface, and multiple human-computer interactions corresponding to the same virtual upper computer
- the interactive interface displayed by the device is synchronized.
- the human-machine interaction device can be located at a location that is reachable by any other network, local or non-local.
- the human-machine interaction device may be a portable terminal.
- the human-computer interaction device of the invention is only responsible for simple human-computer interaction tasks, that is, display output and user instruction (such as mouse, keyboard, etc.) input, does not participate in the response of the control command and direct control of the local lower-level machine, but the user The instructions are fed back to the virtual host computer for processing.
- display output and user instruction such as mouse, keyboard, etc.
- user instruction such as mouse, keyboard, etc.
- the remote server and the virtual upper computer are not felt, and the operation mode is the same as that of the traditional numerical control system, and the traditional numerical control operation is realized. Highly compatible, as well as localization of operations.
- the invention preferentially selects the data lightweighting technology on the real-time image data transmission between the virtual upper computer and the human-computer interaction device, so that the general industrial bandwidth can meet the requirements, and at the same time, the speed of real-time refreshing of the human-computer interaction interface is solved.
- the problem is preferably to adopt a rectangular area refresh method to fully guarantee the user experience of the operator.
- the human-computer interaction module uses the virtual upper computer as the carrier, and can conveniently integrate the third-party software to provide high-end intelligent services for the numerical control system.
- the human-computer interaction module is integrated in the virtual upper computer by means of application software, which has cross-platform characteristics and high portability.
- application software which has cross-platform characteristics and high portability.
- the remote server is set as the host of the virtual upper computer, and the high-performance kernel, the flexible memory and the hard disk space, and the powerful computing capability are provided for the virtual upper computer, and the processing of the numerical control system upper computer is optimized and improved. performance.
- the virtual host computer-based numerical control system is provided with a system backup unit on the remote server for the virtual upper computer.
- the virtual recovery device can be quickly recovered from the backup unit, thereby improving the The reliability of the entire CNC system.
- the present invention proposes a brand new numerical control system architecture, which uses virtualization technology to re-arrange the structure of the upper and lower position of the traditional numerical control system, replaces the local upper computer with the virtual upper computer, and constructs with the local lower computer.
- Forming a new CNC system upper and lower machine architecture simplifying local CNC equipment, greatly reducing the production cost of the enterprise and the difficulty of maintenance of the CNC system.
- the above-mentioned system architecture of the present invention can make the function development and performance improvement of the numerical control system host computer no longer limited by local hardware and software resources, and can improve the superior software of the host computer by relying on the powerful software and hardware resources and computing performance of the remote server. Data processing capability to optimize the processing performance of the CNC system.
- the human-computer interaction module described in the present invention does not depend on a specific operating system, and once the requirements for running in a new environment or an operating system are available, the module can be easily transplanted.
- the virtual upper computer in the present invention is provided with a system backup unit on the remote server where it is located, When an irreversible fault occurs in the bit machine, the quick recovery can be obtained from the backup unit, which improves the reliability of the numerical control system.
- the invention is based on the virtualization technology, and can flexibly allocate, expand or upgrade virtual hardware and software resources for the virtual host computer according to the processing requirements of the numerically controlled machine tool, thereby greatly improving the scalability and resource utilization of the numerical control system.
- the invention utilizes virtualization technology to enable the remote desktop client to integrate on any human-computer interaction device, including a PC, a tablet computer, a mobile phone, etc., and realizes that the numerical control processing process is no longer limited by monitoring equipment and monitoring. Location, indirectly improve the reliability and productivity of machine tool processing.
- the virtual upper computer in the present invention can conveniently integrate third-party software, and can improve the current situation that the numerical control system of the numerical control system restricts the development of the numerical control system to the intelligent and multifunctional, and improves the service capability of the numerical control system. At the same time, it also provides conditions for the operator to expand the functions of the CNC system according to actual needs.
- FIG. 1 is a schematic structural view of a numerical control system and a machine tool structure in the prior art
- the upper computer is an HMI, which is responsible for the non-real-time tasks of the system
- the lower computer is the NCU and the PLC, and is responsible for the real-time motion control and logic control of the system;
- FIG. 3 is a schematic structural diagram of a local numerical control system based on a virtual upper computer according to an embodiment of the present invention
- FIG. 4 is a schematic structural diagram of a remote numerical control system based on a virtual upper computer according to an embodiment of the present invention
- FIG. 5 is a schematic diagram of a control flow of an operator of a numerical control system based on a virtual upper computer to a local lower computer according to an embodiment of the present invention.
- the numerical control architecture in this mode includes a virtual upper computer, a local lower computer, and a local numerical control display device, which is referred to as a local numerical control system in this embodiment.
- the virtual host computer runs on the remote server and is responsible for non-real-time/semi-real-time tasks of the CNC system, including rapid programming, decoding, G code simulation and optimization, offline speed planning, and analysis and storage of processing data.
- the control data is provided to the local lower computer; the local lower computer is responsible for receiving the control data provided by the virtual upper computer, performing the system real-time motion control and logic control tasks;
- the local numerical control display device is responsible for providing the virtual human interface for the operator locally. And send user instructions to the virtual host computer for processing.
- the above mode allows the numerical control system to retain only the lower position machine and the simple display device locally, which greatly simplifies the local hardware and software equipment of the numerical control system, and reduces the production cost of the enterprise and the maintenance difficulty of the numerical control system.
- Operator When the machining operation is performed on the local numerical control display device, the remote server and the virtual upper computer are not felt, which is no different from the operation of the traditional numerical control system. That is, the mode is compatible with the traditional machining operation by means of remote operation localization.
- the method also enhances the intelligence degree of the numerical control system.
- the processing performance of the machine tool is improved by improving the data processing capability of the upper computer of the numerical control system.
- the human-machine interaction device in this mode is not a local numerical control display device, but a non-local display terminal that is reachable by any network, including a PC and a tablet.
- the mobile phone, etc. the operator can remotely monitor the numerical control processing by remotely accessing the virtual upper computer, so the numerical control system in this mode is called the remote numerical control system.
- This mode allows the CNC system to keep the lower position machine locally, further simplifying the local numerical control equipment.
- the human-computer interaction equipment can be set at any position that is reachable by the network, the operator avoids the noisy workshop working environment and improves its The accuracy of the machining operation.
- Figure 5 is the remote control flow of the human-machine interaction device to the local lower-level machine.
- the operator directly controls the machining process of the machine through the remote human-machine interaction device, and does not feel the remote server and virtual upper-level running in the background. machine.
- the virtual upper computer in the above two embodiments all use the remote server as the carrier, relying on the powerful software and hardware resources of the server, in the control performance and system scalability, the numerical control system host computer has been greatly improved, and the numerical control system is improved. Service capacity and processing efficiency, and reduce production costs.
- the human-computer interaction module set in the virtual upper computer is integrated by means of application software, and is responsible for providing a virtual human-computer interaction interface for the human-computer interaction device.
- the specific working process is as follows:
- the human-machine interaction device sends a login request to the virtual host computer
- the human-computer interaction device re-renders the desktop image information transmitted by the virtual upper computer to its own screen
- the human-computer interaction application in the virtual host computer creates a network connection with the local lower-level machine
- the virtual upper computer presents a numerical control processing interface, and sends the interface update information to the human-machine interaction device;
- the human-computer interaction device updates the virtual interface output by itself according to the update information of the upper computer interface, and provides the virtual CNC machining operation interface to the user;
- the update information is sent to the human-machine interaction device to refresh the virtual human-computer interaction interface in real time.
- the human-computer interaction interface (HMI) operated by the user is actually only a "picture", which is a copy of the desktop image of the virtual upper computer.
- the human-computer interaction device is only responsible for receiving the user instruction, and feeding back the user instruction to the virtual upper computer, processing the user instruction by the virtual upper computer, then forming a control signal to the local lower computer, and transmitting the desktop image update information to the human machine.
- Interactive devices, so the human-computer interaction device is not directly involved in the processing control, but indirectly through the virtual host computer.
- the human-computer interaction module is preferably developed by using QML technology.
- QML is a descriptive scripting language, and supports programming control in the form of JavaScript. It is mainly used to develop applications based on user interfaces, and has cross-platform, The advantages of strong portability, short development cycle, high scalability, and smooth interface development.
- the human-computer interaction module in the present invention can be quickly installed on systems such as Windows and Linux, and does not depend on a specific operating system and deployment environment.
- the human-computer interaction application actively requests to establish a network connection with the local lower-level computer. If the connection is successful, the HMI interface is normally displayed. Otherwise, the startup fails. When the network connection is successful, the human-computer interaction module will be based on the virtual upper-level.
- the resolution of the machine interface automatically adjusts its display size to maintain the best display effect, ensuring the operator's application experience.
- the above-mentioned human-computer interaction module uses the virtual upper computer as the carrier, which can easily integrate the third-party software. This can improve the computing performance of the original numerical control system, and can also flexibly expand the functions of the numerical control system and improve the service capability of the numerical control system. It provides conditions for the operator to expand the functions of the CNC system according to actual needs, so that the CNC system can flexibly adapt to different application fields and on-site processing needs.
- each virtual upper computer corresponds to a unique local lower computer, that is, the virtual upper computer and the local lower computer are in one-to-one correspondence, so that the virtual upper computer can personally configure its own resources according to the processing requirements of the corresponding machine tool. , including kernel performance, memory, hard disk space, required third-party software libraries, and more.
- the remote server acts as the host of the virtual upper computer. If each server is configured with only one virtual upper computer, each server can only serve one local lower computer. This will not only cause a lot of waste of resources, but even The production cost of the enterprise is increased.
- multiple virtual upper computers are set on each server, and each virtual upper computer maintains relatively independent resources, so that a single server can simultaneously serve multiple local lower computers.
- a set of numerical control system needs at least one human-machine interaction device, but in the present invention, one human-computer interaction device can simultaneously run multiple through the remote desktop client.
- Virtual human-computer interaction interface then a single human-computer interaction device can serve multiple sets of CNC systems, as shown in Figure 4, which further reduces the production cost of the enterprise, and is also conducive to the unified monitoring and management of CNC machining in the workshop. .
- the present invention provides a virtual machine with a host computer system backup unit on the remote server. When it is faulty, it can be quickly recovered from the backup system, which improves the reliability of the CNC system.
- the virtual kernel performance, memory resources, and disk space of the virtual upper computer are configured according to the processing requirements of the local lower computer, so that the server resources are fully and effectively utilized.
- the virtual upper computer created on a single server is deployed according to the total load that all virtual upper computers may bear, so as to ensure that the server is not overloaded, thereby ensuring the stability of the entire numerical control system.
- the virtual upper computer if it does not receive the feedback signal of the human-computer interaction device or the local lower-level machine within a certain period of time, it will automatically enter the sleep mode to reduce the running resources of the server and improve the running performance of the un-sleeping virtual upper computer.
- the virtual upper computer When it receives the service request from the human-computer interaction device or the local lower-level machine, it will immediately “wake up” and switch to the normal working mode.
- the general real-time image data transmission method occupies a large amount of workshop network bandwidth, which affects the transmission of control data and affects the accuracy and stability of the numerical control processing.
- the data lightweighting technology is preferably used to compress the real-time transmitted image data. It greatly reduces the occupancy rate of real-time image data to the workshop network bandwidth, so that the general workshop network can meet the demand.
- the present invention preferably adopts a rectangular area refreshing method, that is, the virtual upper computer only covers the image information of the smallest rectangular area of the changed area, instead of the image information of the entire desktop.
- the human-computer interaction device refreshes the changed interface area according to the update information sent by the virtual upper computer, which speeds up the real-time data transmission and accelerates the virtual human-computer interaction interface.
- the refresh rate ensures the operator's application experience.
- virtualization means that the application software runs on a virtual software and hardware platform, and the virtualization technology can significantly improve the performance, function, and intelligence of the numerical control system while reducing the cost of hardware and software.
- the realization of the numerical control system host computer virtualization is the most effective way to solve the above problems, that is, using the virtualization technology, the human-computer interaction module is deployed on the virtual machine on the remote server to form a virtual upper computer, replacing the traditional Local host computer.
- the application of PC virtualization technology in the field of CNC machining will greatly promote the development of CNC technology to the high-end intelligent direction, and indirectly promote the continuous improvement of its application field.
- the application of virtualization technology can easily affect the stability of the CNC system, increase the failure rate and test difficulty of the CNC system, and even affect the accuracy of CNC machining, so ensure the stability and machining accuracy of the CNC system is virtualized in the CNC.
- the transmission and processing of real-time image data is also one of the difficulties in realizing the virtualization of the host computer, because the transmission of real-time image data will occupy a large network bandwidth, thus affecting the transmission of real-time processing control data, reducing the efficiency of CNC machining, and it is difficult to guarantee.
- the application experience of the operator The development threshold of the human-computer interaction interface of the numerical control system is relatively high. Developers must have a deeper understanding of the CNC system architecture.
- the human-computer interaction module of the current CNC system relies on a specific operating system. Once there is a demand for running in a new environment or operating system, it often takes a lot of cost. Labor modification and porting, rather than cross-platform application framework, API of specific operating system, non-cross-platform third-party library and other factors hinder cross-platform development of human-computer interaction module, and also for the development of host computer virtualization It brings a lot of difficulty.
- the numerical control system based on virtual upper computer proposed by the invention in particular, adopts QML technology, can overcome the problem that the human-computer interaction module depends on a specific operating system, and can utilize high compression amount based on data lightweight technology in real-time image data transmission. The data compression method reduces the occupancy rate of the workshop network bandwidth.
- the architecture of the present invention adopts a frame buffering technique and a rectangular area refreshing method, which fully guarantees the application experience of the operator; in addition, when the numerical control processing data transmission conflicts with the operator's request signal to the virtual upper computer, When the virtual upper computer can process the processing data preferentially to ensure the reliability and efficiency of the numerical control processing, the invention also adopts the load balancing optimization technology of the virtual machine cluster and the backup system of the upper computer system to ensure the stability of the numerical control system.
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Abstract
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Claims (10)
- 一种基于虚拟上位机的数控系统,其通过将上位机以虚拟机的方式设置在远程服务器中形成虚拟上位机,利用该虚拟机上位机和位于本地的下位机配置形成上下位机架构,并利用两者的交互完成机床加工控制,其特征在于,该数控系统包括设置在远程服务器上的虚拟上位机、位于本地的数控系统下位机、以及用于人机交互的人机交互设备,所述虚拟上位机和人机交互设备之间、以及虚拟上位机和本地下位机之间均通过网络连接,其中,所述人机交互设备用于提供人机交互输入/输出接口,数控加工指令通过该人机交互设备被输入;所述虚拟上位机上集成有用于实现人机交互的人机交互模块、用于执行数控加工非实时/半实时性任务的非实时/半实时性任务执行单元、以及用于控制机床加工的下位机控制单元,该虚拟上位机通过所述人机交互模块接收所述人机交互设备输入的数控加工指令,并通过其中的非实时/半实时任务执行单元进行处理以形成机床控制指令,进而通过下位机控制单元将控制数据利用网络传输至本地下位机;所述本地下位机接收虚拟上位机提供的控制数据,进而控制机床执行实时性的运动控制和逻辑控制。
- 根据权利要求1所述的基于虚拟上位机的数控系统,其中,所述人机交互设备显示的界面为虚拟界面,其由所述人机交互设备通过从虚拟上位机获取相应信息后绘制生成,即其实质是虚拟上位机界面的拷贝。
- 根据权利要求1或2所述的基于虚拟上位机的数控系统,其中,所述人机交互设备上虚拟界面的绘制生成采用矩形区域刷新的方式实现。
- 根据权利要求1-3中任一项所述的基于虚拟上位机的数控系统,其中,所述数控系统可设置多个人机交互设备,其分别通过网络与所述虚拟上位机连接,以提供人机交互接口,同一个虚拟上位机对应的多个人机交互设备显示的交互界面同步,所述人机交互设备也可同时运行多个不同虚拟上位机对应的人机交互界面。
- 根据权利要求1-4中任一项所述的基于虚拟上位机的数控系统,其中,所述人机交互设备可位于本地或者非本地的其他任意网络可达的位置。
- 根据权利要求1-5中任一项所述的基于虚拟上位机的数控系统,其中,所述人机交互设备可以为便携式终端。
- 根据权利要求1-6中任一项所述的基于虚拟上位机的数控系统,其中,单台远程服务器中的虚拟上位机可以为多个,以分别对应位于本地的多个下位机,从而单台远程服务器可以同时为多个本地下位机提供服务。
- 根据权利要求1-7中任一项所述的基于虚拟上位机的数控系统,其中,所述虚拟上位机可通过其所在的远程服务器进行备份。
- 根据权利要求1-8中任一项所述的基于虚拟上位机的数控系统,其中,所述虚拟上位机中集成的人机交互模块具备跨平台特性,所以虚拟上位机的系统可以为Windows、Linux或Android等。
- 根据权利要求1-9中任一项所述的基于虚拟上位机的数控系统,其中,所述人机交互设备中显示界面可根据所述虚拟上位机的桌面分辨率调整,以适应不同尺寸的显示设备而达到最佳的显示效果。
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