CN110764463A - Monitoring system and computer numerical control system comprising same - Google Patents
Monitoring system and computer numerical control system comprising same Download PDFInfo
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- CN110764463A CN110764463A CN201810843979.7A CN201810843979A CN110764463A CN 110764463 A CN110764463 A CN 110764463A CN 201810843979 A CN201810843979 A CN 201810843979A CN 110764463 A CN110764463 A CN 110764463A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- 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
- G05B19/406—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 monitoring or safety
Abstract
The invention provides a monitoring system for monitoring a computer numerical control system and the computer numerical control system comprising the monitoring system, wherein the monitoring system comprises: a forwarding unit configured to be connected to an input-output port of a numerical control unit of the computer numerical control system and to forward a data stream communicated through the input-output port; and an analysis unit configured to be connected to the forwarding unit and receive the data stream forwarded by the forwarding unit to analyze the received data stream. Thus, data communicated between elements of the cnc system can be directly obtained without the need to modify applications/software of the existing cnc system.
Description
Technical Field
The invention relates to a monitoring system and a computer numerical control system comprising the same.
Background
Computer Numerical Control (CNC) systems are automated mechanical devices that execute a preprogrammed sequence of machine control commands via a computer. Modern CNC systems are not one single device, but control systems made up of a plurality of devices. Such as SINUMERIK 840D, available from siemens corporation.
A typical CNC system may include a numerical control unit as a central processing device of the CNC system. The numerical control unit may be composed of a single or several Central Processing Units (CPUs) to control operation units or devices of a machine tool and the like included in the CNC system, control the execution of software, and control communication between the respective units within the CNC system. Additionally, the CNC system may also include a customer panel. The customer panel may provide a Human Machine Interface (HMI) for an operator or user so that the user may control the CNC system through the customer panel.
The various units included in the CNC system may be connected and communicate with each other, for example, using an ethernet-based network. Thus, to effectively manage a CNC system, data communicated between the various elements of the CNC system may be acquired and monitored.
Disclosure of Invention
The present invention is directed to a monitoring system and a cnc system including the same that solve the above and/or other technical problems.
An exemplary embodiment provides a monitoring system configured to monitor data flow in an internal network of a cnc system, wherein the cnc system includes a nc unit including an input output port connected to the internal network of the cnc system, the monitoring system comprising: a forwarding unit configured to be connected to an input-output port of the numerical control unit and to forward a data stream communicated through the input-output port; and an analysis unit configured to be connected to the forwarding unit and receive the data stream forwarded by the forwarding unit to analyze the received data stream.
Furthermore, the computer numerical control system further includes a user panel unit connected to an input/output port of the numerical control unit so as to communicate with the numerical control unit and transmitting information input by a user through the user panel unit to the numerical control unit, and a forwarding unit configured to forward a data stream communicated between the numerical control unit and the user panel unit to the analysis unit. The computer numerical control system further includes a maintenance unit connected to an input/output port of the numerical control unit to communicate with the numerical control unit and to transmit information for maintaining the computer numerical control system to the numerical control unit, and a forwarding unit configured to forward a data stream communicated between the numerical control unit and the maintenance unit to the analysis unit. The computer numerical control system further includes an operation unit connected to an input/output port of the numerical control unit to communicate with the numerical control unit to operate according to a control command from the numerical control unit, and a forwarding unit configured to forward a data stream communicated between the numerical control unit and the operation unit to the analysis unit.
The forwarding unit includes: and a mirror port configured to be connected to the analysis unit, wherein the forwarding unit is configured to forward the data stream by mirroring the input/output port of the numerical control unit to a port of the mirror port. The forwarding unit is configured as a network switch or network splitter.
The analysis unit is configured to perform full packet capture on the received data stream. In another exemplary embodiment, the monitoring system further comprises: the sensor unit is connected between the forwarding unit and the analysis unit, and is configured to receive the data stream forwarded from the forwarding unit, perform full packet capture on the received data stream, and send the resulting result to the analysis unit.
The analysis unit is configured to analyze the forwarded data stream according to the type of protocol employed for communication of the data stream. For example, the analysis unit is configured to monitor, recover or record data communicated by means of the file transfer protocol FTP or the trivial file transfer protocol TFTP in accordance with the forwarded data stream. The analysis unit is configured to monitor, recover or record data communicated via the private protocol in accordance with the forwarded data stream. The analysis unit is designed to record and analyze the user's input in accordance with the forwarded data flow between the numerical control unit and the user panel unit, which data flow is communicated via the VNC protocol. The analysis unit is configured to extract or extract and monitor the M-code or G-code of the operation of the numerical control unit from the forwarded data stream.
The monitoring system further comprises: a reproduction unit configured to reproduce a result of the analysis performed by the analysis unit.
Another exemplary embodiment provides a computer numerical control system including: the numerical control unit comprises an input/output port, wherein the numerical control unit is connected to an internal network of the computer numerical control system through the input/output port; and a monitoring system as described above.
As described above, the monitoring system according to the exemplary embodiment may be applied to or included in a Computer Numerical Control (CNC) system. Such a Computer Numerical Control (CNC) system may include a plurality of units, e.g., a Numerical Control Unit (NCU), a user panel unit, etc., which are directly connected by a network cable to constitute an internal network. To obtain network traffic data (i.e., data flow) in an internal network of a Computer Numerical Control (CNC) system, a monitoring system according to an exemplary embodiment includes a forwarding unit, such as a switch, and configures port mirrors on the switch to forward the network traffic to an analysis unit. Thus, the acquisition and monitoring of data can be performed without restriction of the data accessible by the providers (e.g., suppliers) of the individual units in the cnc system. By capturing the FPC with the full message data packet, the monitoring system according to the exemplary embodiment can directly obtain the internal data stream communicated between the respective units in the cnc system, and can then obtain and reproduce the asset list, status and operation of the cnc system.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein the content of the first and second substances,
FIG. 1 is a schematic block diagram illustrating a monitoring system and a Computer Numerical Control (CNC) system including the monitoring system in accordance with an exemplary embodiment;
fig. 2 is a block diagram illustrating another example of a monitoring system according to an exemplary embodiment.
Description of reference numerals:
10 monitoring system 11 forwarding unit 13 analysis unit 15 sensor unit 17 reproduction unit
100 numerical control unit 300 user panel unit 500 maintenance unit
700 operating unit 900 web server
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
Fig. 1 is a schematic block diagram illustrating a Computer Numerical Control (CNC) system of a monitoring system and the monitoring system included in the CNC system according to an exemplary embodiment. As shown in fig. 1, the CNC system according to the exemplary embodiment may include a Numerical Control Unit (NCU)100 and a monitoring system 10, and further, the monitoring system 10 may include a forwarding unit 11 and an analyzing unit 13.
The numerical control unit 100 may be a central processing device of a CNC system. For example, in siemens sinimerik 840D, numerical control unit 100 may include a numerical control CPU (central processing unit) and a PLC (programmable logic controller) CPU to run corresponding digital software (numerical software) and PLC control software, respectively. The numerical control unit 100 can control communication between the respective units within the CNC system and can directly control the operation of the operation units such as the machine tool and the like in the CNC system.
The CNC system may comprise or have an internal network, represented in the figure by the connecting lines between the various units. The various units in the CNC system may communicate with each other through an internal network. In one example, the internal network of the CNC system may be an ethernet network.
The numerical control unit 100 may include an input-output port. The numerical control unit 100 may be connected to an internal network through input and output ports, thereby enabling communication with the various units within the CNC system.
Further, as shown in fig. 1, the CNC system may further include a user panel unit 300, a maintenance unit 500, an operation unit 700, and the like. The units in the CNC system such as the user panel unit 300, the maintenance unit 500, the operation unit 700 may also include input and output ports and be connected to the internal network through the input and output ports. To this end, the CNC system may also comprise a web server 900. In other words, the numerical control unit 100, the user panel unit 300, the maintenance unit 500, the operation unit 700, and the like may be connected to an internal network through an input/output port to perform communication.
Specifically, the numerical control unit 100 may be connected to the user panel unit 300 through an input/output port. The user panel Unit 300 may be, for example, a Thin Client Unit (TCU) or a Panel Control Unit (PCU). The thin client unit TCU may be a thin client operating panel for the numeric control unit 100, which may integrate a graphical user interface of a Human Machine Interface (HMI). The panel control unit PCU may be an industrial computer having a separate central processing unit CPU, hard disk and display. Such a panel control unit PCU is mainly used for human-computer interaction visualization, including operation, programming, diagnostics, etc. The user can make inputs via the thin client unit TCU or the panel control unit PCU, for example to control the numerical control unit 100 and thus the entire CNC system.
In siemens sinimerik 840D, a user panel unit 300, such as a thin client unit TCU or a panel control unit PCU, may serve as a Human Machine Interface (HMI) that may be connected to input and output ports of the numerical control unit 100 through, for example, ethernet and thus communicate with the numerical control unit 100, may provide panel control of the HMI, and support engineers to send instructions to the numerical control unit 100 via the user panel unit 300 to control operation of the CNC system.
Further, the numerical control unit 100 may be connected to the maintenance unit 500 through an input/output port. The maintenance unit 500 may be a Local Service Station (Local Service Station) supporting an engineer to maintain the CNC system. The maintenance unit 500 may be connected to an input-output port of the numerical control unit 100 through, for example, ethernet and thus communicate with the numerical control unit 100, so as to transmit an input (e.g., information that a user maintains the CNC system) made by an engineer/user through the maintenance unit 500 to the numerical control unit 100 and receive and reproduce the information from the numerical control unit 100 to the user. Thus, the user can perform maintenance on the CNC system through the maintenance unit 500.
Further, the numerical control unit 100 may be connected to the operation unit 700 through an input/output port. The operation unit 700 may be a unit, for example, a machine tool, which performs various operations in the CNC system to complete production, manufacturing, machining, etc. of a product. Alternatively, the operation unit 700 may be a driving unit (Drives) for driving the above-described unit in the CNC system to perform the above-described operation. The operation unit 700 may be connected to an input-output port of the numerical control unit 100 through, for example, an ethernet network and thus communicate with the numerical control unit 100, so that the numerical control unit 100 can transmit a control command for controlling the operation of the operation unit 700 to the operation unit 700 and/or receive operation-related information of the operation unit 700 from the operation unit 700.
Referring to fig. 1, the forwarding unit 11 may be connected to an input-output port of the numerical control unit 100. The forwarding unit 11 may forward a data stream communicated through an input-output port of the numerical control unit 100. For example, the forwarding unit may be communicatively coupled to an input/output port of the numerical control unit 100 via an ethernet network. As described above, the numerical control unit 100 can be connected to and communicate with the user panel unit 300, the maintenance unit 500, and the operation unit 700 through the input/output port, and the forwarding unit 11 can forward a data stream communicated through the input/output port. For example, the forwarding unit 11 may forward a first data stream for communication between the numerical control unit 100 and the user panel unit 300, a second data stream for communication between the numerical control unit 100 and the maintenance unit 500, and a third data stream for communication between the numerical control unit 100 and the operation unit 700.
To this end, the forwarding unit 11 may comprise a mirror port. The forwarding unit 11 may forward the first, second and third data streams by port mirroring the input/output port of the numerical control unit 100 to the mirror port. The port mirroring technique may be a known technique, and thus a detailed description of the known technique is omitted herein for conciseness. As an example, the forwarding unit 11 may be implemented as a network switch (switch) or a network TAP (TAP). In another exemplary embodiment, the forwarding unit 11 may be connected to an input/output port of the user panel unit 300, the maintenance unit 500, and/or the operation unit 700, which is connected to and communicates with the numerical control unit 100, and thus may forward a data stream communicated between the user panel unit 300, the maintenance unit 500, and/or the operation unit 700 and the numerical control unit 100.
As shown in fig. 1, the analyzing unit 13 may be connected to the forwarding unit 11. The analyzing unit 13 may receive the data stream forwarded by the forwarding unit 11 and may analyze the forwarded data, which will be described in more detail below. For this purpose, the analysis unit 13 may be implemented as a unit with computing and processing capabilities, for example a computer. For example, the analyzing unit 13 may be communicatively connected to a mirror port of the forwarding unit 11 via ethernet, so as to receive the first, second and third data streams forwarded by the forwarding unit 11 via the mirror port using port mirroring. In another exemplary embodiment, the analysis unit 13 may be communicatively coupled to the forwarding unit 11 by wire or wirelessly, such as Asymmetric Digital Subscriber Line (ADSL), wireless fidelity (WI-FI), or fourth generation mobile communication technology (4G). At this time, the analysis unit 13 may be implemented as a remote processing server or a cloud. At this time, although not shown in fig. 1, the monitoring system 10 according to an exemplary embodiment may further include a gateway or a Wide Area Network (WAN) network interface, thereby enabling such wired or wireless communication.
The forwarding unit 11 may directly forward the data stream communicated between the cnc unit 100 and other units in the computer numerical control system to the analysis unit 13, and at this time, the analysis unit 13 may perform Full Packet Capture (FPC) so as to store the received data stream as a file in, for example, a PCAP format. However, exemplary embodiments are not limited thereto, and a block diagram of another example of a monitoring system according to an exemplary embodiment is shown in fig. 2. As shown in fig. 2, similar to the embodiment described above with reference to fig. 1, a monitoring system 10' according to another example may comprise a forwarding unit 11 and an analyzing unit 13. In this specification, a repetitive description of the same or similar elements will be omitted in order to avoid redundancy. The cnc system and monitoring system 10' as shown in fig. 2 may comprise a sensor unit 15. The sensor unit 15 can be connected between the forwarding unit 11 and the analysis unit 13. The sensor unit 15 may receive the data stream forwarded from the forwarding unit 11 and perform Full Packet Capture (FPC) on the received data stream to convert the received data stream into a file in, for example, a PCAP format. The sensor unit 15 may then send the resulting PCAP formatted file to the analysis unit 13.
After getting or receiving the forwarded data stream, e.g. as a file in PCAP format, the analyzing unit 13 may analyze the received data stream. For example, the analysis unit 13 may extract different types of data streams from the received data streams. The extraction of the data stream can be performed according to different conditions. For example, if it is desired to extract a first data stream for communication between the numerical control unit 100 and the user panel unit 300 from the received data stream, the extraction of the data stream may be performed according to the IP addresses of the numerical control unit 100 and the user panel unit 300. Further, the extraction of the data stream may be performed according to TCP/UDP processes, network transport protocols such as VNC, SNMP, HTTP, FTP, TFTP, proprietary protocols, etc., application layer data streams, and/or other conditions to obtain the desired data stream.
Then, desired key feature information may be further extracted from the extracted data stream, and a computer numerical control system asset inventory (asset) may be generated from the extracted key feature information. The key characteristic information may include, for example, a MAC address (which may be used to associate with the vendor of the device to which the MAC address is assigned), an IP address, a port, information indicating which ports of which units the data stream is communicated between, and information indicating whether a failure (malfunction) has occurred in the cnc system.
Furthermore, the analysis unit 13 may analyze the forwarded data stream according to the type of protocol used for communication of the data stream. For example, the Analysis unit 13 may use Deep Packet Analysis (Deep Packet Analysis) that decodes a specific data stream such as VNC, FTP, and proprietary protocol, thereby collecting and monitoring the operation and control of the cnc system.
Specifically, for a data stream communicated by the VNC protocol, for example, a first data stream communicated by the VNC protocol between the numerical control unit 100 and the user panel unit 300, the analysis unit 13 may analyze and record user input, where the user input may include, for example, user input on the user panel unit 300 providing a human-computer interaction interface, such as pressing operations of different buttons on the user panel unit 300 by the user in order to control the computer numerical control system to perform different operations, and the like.
Further, with respect to the data stream of the application layer communication, the analysis unit 13 may analyze it and may extract and monitor an M Code (M-Code) or a G Code (G-Code) for the operation of the cnc system.
Further, for a data stream communicated by the FTP/TFTP protocol, a data stream communicated by the FTP/TFTP protocol between the numerical control unit 100 and the user panel unit 300 such as the NCU, the analysis unit 13 may monitor, reply to, and record data transmitted between different units.
Furthermore, for data streams communicated by means of a proprietary protocol, the analysis unit 13 may monitor, reply to and record data exchanged between the different units.
Thus, by the above-described analysis of the analyzing unit 13, the collection and monitoring of detailed states and operations of the cnc system can be achieved. Furthermore, the monitoring system 10' according to an exemplary embodiment may further comprise a reproduction unit 17, see fig. 2. Although not shown in fig. 1, the monitoring system 10 in the exemplary embodiment described above with reference to fig. 1 may also include a reproduction unit. The reproduction unit 17 may reproduce the analysis result obtained by the analysis unit 13, for example, the analysis result may include assets of the cnc system, a state of the cnc system, an operation of the cnc system, and the like. The reproduction unit 17 may reproduce using visualization techniques. In one example, the reproducing unit 17 may include a display on which the analysis result may be reproduced in the form of a dashboard (dash board).
As described above, the monitoring system according to the exemplary embodiment may be applied to or included in a Computer Numerical Control (CNC) system. Such a Computer Numerical Control (CNC) system may include a plurality of units, e.g., a Numerical Control Unit (NCU), a user panel unit, etc., which are directly connected by a network cable to constitute an internal network. To obtain network traffic data (i.e., data flow) in an internal network of a Computer Numerical Control (CNC) system, a monitoring system according to an exemplary embodiment includes a forwarding unit, such as a switch, and configures port mirrors on the switch to forward the network traffic to an analysis unit. Thus, the acquisition and monitoring of data can be performed without restriction of the data accessible by the providers (e.g., suppliers) of the individual units in the cnc system. By capturing the FPC with the full message data packet, the monitoring system according to the exemplary embodiment can directly obtain the internal data stream communicated between the respective units of the cnc system, and can then obtain and reproduce the asset list, status and operation of the cnc system.
In other words, the monitoring system according to an exemplary embodiment may employ a passive additional data acquisition and monitoring scheme, i.e. data communicated between the units of the cnc system may be obtained directly through the full packet data step FPC without the need to modify the applications/software of the cnc system.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent alterations, modifications and combinations can be made by those skilled in the art without departing from the spirit and principles of the invention.
Claims (15)
1. Monitoring system (10), characterized in that it is configured to monitor data flows in an internal network of a cnc system, wherein the cnc system comprises a numeric control unit (100), the numeric control unit (100) comprising an input-output port connected to the internal network of the cnc system, the monitoring system comprising:
a forwarding unit (11) configured to be connected to an input-output port of the numerical control unit (100) and to forward a data stream communicated through the input-output port;
an analysis unit (13) configured to be connected to the forwarding unit (11) and to receive the data stream forwarded by the forwarding unit (11) for analyzing the received data stream.
2. The monitoring system of claim 1, wherein the computerized numerical control system further comprises a user panel unit (300), the user panel unit (300) being connected to an input/output port of the numerical control unit to communicate with the numerical control unit and transmitting information input by a user through the user panel unit to the numerical control unit,
the forwarding unit (11) is configured to forward a data stream of the communication between the numerical control unit and the user panel unit to the analysis unit.
3. A monitoring system according to claim 1, characterized in that the computerized numerical control system further comprises a maintenance unit (500), the maintenance unit (500) being connected to an input-output port of the numerical control unit for communicating with the numerical control unit and for transmitting information for maintaining the computerized numerical control system to the numerical control unit,
the forwarding unit (11) is configured to forward a data stream communicated between the numerical control unit and the maintenance unit to the analysis unit.
4. The monitoring system of claim 1, wherein the computerized numerical control system further comprises an operation unit (700), the operation unit (700) being connected to an input-output port of the numerical control unit to communicate with the numerical control unit to operate according to a control command from the numerical control unit,
the forwarding unit (11) is configured to forward a data stream communicated between the numerical control unit and the operating unit to the analyzing unit.
5. The monitoring system according to claim 1, wherein the forwarding unit (11) comprises:
a mirror port configured to be connected to an analysis unit (13),
wherein the forwarding unit is configured to forward the data stream by port mirroring the input/output port of the numerical control unit to the mirroring port.
6. A monitoring system as claimed in claim 5, characterised in that the forwarding unit (11) is constructed as a network switch or network splitter.
7. Monitoring system according to claim 1, characterized in that the analysis unit (13) is configured to perform full packet capture on the received data stream.
8. The monitoring system of claim 1, wherein the monitoring system (10) further comprises:
and a sensor unit (15) connected between the forwarding unit (11) and the analysis unit (13) and configured to receive the data stream forwarded from the forwarding unit (11), perform full packet data packet capture on the received data stream, and send the obtained result to the analysis unit (13).
9. Monitoring system according to claim 1, characterized in that the analysis unit (13) is configured to analyze the forwarded data stream depending on the type of protocol used for the communication of the data stream.
10. Monitoring system according to claim 1, characterized in that the analysis unit (13) is configured to monitor, recover or record data communicated by means of the file transfer protocol FTP or the trivial file transfer protocol TFTP in accordance with the forwarded data stream.
11. Monitoring system according to claim 1, characterized in that the analysis unit (13) is configured to monitor, recover or record data communicated by means of a proprietary protocol in accordance with the forwarded data stream.
12. A monitoring system according to claim 2, characterized in that the analysis unit (13) is configured to record and analyze the user's input according to a data flow communicated between the forwarded numerical control unit (100) and the user panel unit (300) via the VNC protocol.
13. Monitoring system according to claim 1, characterized in that the analysis unit (13) is configured to extract or extract and monitor the M-code or G-code of the operation of the numerical control unit (100) from the forwarded data stream.
14. The monitoring system of claim 1, further comprising:
a reproduction unit (17) configured to reproduce a result of the analysis performed by the analysis unit.
15. A computer numerical control system, characterized in that the computer numerical control system comprises:
the numerical control unit (100) comprises an input/output port, wherein the numerical control unit is connected to an internal network of the computer numerical control system through the input/output port;
the monitoring system (300) of any one of claims 1 to 14.
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