CN205407858U

CN205407858U - Remote network control system based on virtual local area network

Info

Publication number: CN205407858U
Application number: CN201620145488.1U
Authority: CN
Inventors: 陈卫忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-02-27
Filing date: 2016-02-27
Publication date: 2016-07-27
Anticipated expiration: 2026-02-27

Abstract

The utility model relates to a remote network control system based on virtual local area network, its characterized in that is including being located local user terminal and the long -range the client terminal of IP address at the same network segment, local user terminal and long -range the client terminal link to each other with the public network server of being connected on the internet through a remote network connector respectively, the remote network connector that ethernet packet that local user terminal and long -range the client terminal sent is connected is respectively separately received, the received packet is added the identifying information sign indicating number and is paird and send for the public network server behind the mark, corresponding mating remote network connector is given according to the identifying information sign indicating number and the mark that pairs with data packet transmission to the public network server, ether net gape through the remote network connector sends local user terminal or long -range the client terminal for corresponding at last, realize local user terminal and long -range the client terminal's direct internet access.

Description

Remote network control system based on VLAN

Technical field

This utility model relates to a kind of ethernet device telecommunication system, particularly relates to a kind of remote network control system based on VLAN, for far-end industrial control equipment is operated.Belong to network engineeringtechnique field.

Background technology

Remotely monitoring is to compare traditional on-site supervision pattern, a kind of technical approach emerging in conjunction with modern communication technology and the information processing technology, at space flight and aviation, Industry Control, food, education, Smart Home etc., particularly be not easy to or the field of dangerous on-site supervision is widely used market at some, have safe and reliable, be easy to observation, be beneficial to the advantages such as process.

Current Ethernet is more and more applied in automation control area, for instance programmable controller, touches the industrial control equipments such as display screen.Equipment manufacturers and equipment user are used mostly PC and by Ethernet, equipment are programmed, and debug or monitoring.In a local network, telecommunication needs the special equipment (such as router, switch etc.) of other costlinesses to these equipment general works, and communication is relatively difficult, is unfavorable for remote equipment debugging, remote maintenance.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of remote network control system based on VLAN for above-mentioned prior art, PC or other network equipments can be directly connected to by the Internet and the long-range network equipment, equipment manufacturers and equipment user is enable equipment to carry out remote debugging, remotely programming by the Internet, remotely monitors, time saving and energy saving, economize traveling expense.

nullThe technical scheme in the invention for solving the above technical problem is: a kind of remote network control system based on VLAN，It is installed on the LUT of local user including in the same network segment one of IP address and another is installed on the remote client terminal of remote client，This remote client terminal is installed on controlled industrial control equipment，Described LUT is connected with the public network server being connected on the internet respectively through a telecommunication network adapter with remote client terminal，Described telecommunication network adapter is by local network interface chip，Internet interface chip and arm processor are constituted，Local network interface chip and internet interface chip are connected by SPI serial line interface with arm processor，Local network interface chip is connected with the network interface of LUT and remote client terminal respectively，Internet interface chip is connected to the public network server on the Internet.

Compared with prior art, the utility model has the advantage of:

This utility model makes terminal unit need not have public network IP address due to the telecommunication network adapter that have employed independent research, as long as the Internet just energy reliably working can be connected, public network server can service the telecommunication network adapter of multiple pairing simultaneously, the quantity processed depends on performance and the network bandwidth of server, and the long-range programming of programmable controller can be used for, remotely monitoring, the long-range monitoring of man machine interface, and other application needing to utilize the Internet entrance specific local network.

Accompanying drawing explanation

Fig. 1 is the system construction drawing of a kind of remote network control system based on VLAN of this utility model.

Fig. 2 is the schematic diagram of the communication process of the arp address resolution protocol of a kind of remote network control system based on VLAN of this utility model.

Detailed description of the invention

Below in conjunction with accompanying drawing embodiment, this utility model is described in further detail.

This utility model relates to a kind of remote network control system based on VLAN, it is installed on the LUT of local user including in the same network segment one of IP address and another is installed on the remote client terminal of remote client, this remote client terminal is installed on controlled industrial control equipment, and described LUT is connected with the public network server being connected on the internet respectively through a telecommunication network adapter with remote client terminal.Telecommunication network adapter is with 2 Ethernet interfaces.The Ethernet interface 2 of local user's telecommunication network adapter connects public network server by the Internet, and Ethernet interface 1 connects the equipment network interface of local user.The Ethernet interface 2 of the telecommunication network adapter that remote client installs connects public network server again by the Internet, and Ethernet interface 1 then connects the equipment network interface of remote client.The telecommunication network adapter that the Ethernet data bag that the equipment of local user and the equipment of remote client send each is connected respectively receives, the packet received is sent to public network server after adding identification information code and pairing labelling, public network server is according to identifying that information code and pairing labelling deliver a packet to the telecommunication network adapter of corresponding pairing, the Ethernet interface 1 eventually passing telecommunication network adapter is sent to the local user of correspondence or the equipment of remote client, is achieved in that local device is connected with the straight-forward network of remote equipment.

Telecommunication network adapter need not have public network IP address, just can reliably working as long as the Internet can be connected.Public network server can service the telecommunication network adapter of multiple pairing, and the quantity of process depends on performance and the network bandwidth of server.Purposes: the long-range programming of programmable controller, remotely monitors, the long-range monitoring of man machine interface, and other application needing to utilize the Internet entrance specific local network.

Described telecommunication network adapter is by local network interface chip (network interface chip ENC28J60), internet interface chip (network interface chip W5500) and arm processor are constituted, and local network interface chip and internet interface chip are connected by SPI serial line interface with arm processor.After telecommunication network adapter power-up initializing, internet interface chip is set up TCP with public network server and is connected, and the telecommunication network adapters of 2 pairings are all set up with public network server after TCP is connected and just can be worked.nullThe packet that LUT network interface sends is received by the local network interface chip of telecommunication network adapter，Arm processor is sent to public network server by internet interface chip after identification information code and additional counter labelling being spliced with packet，Public network server inspection identification information code and additional counter labelling，Transfer a packet to the internet interface chip of the telecommunication network adapter of pairing exactly，Telecommunication network adapter is sent to local network interface chip by local network interface chip after the identification information code of packet and additional counter labelling being removed，For LUT (PC) and remote client terminal (subscriber equipment)，Packet similarly is directly be sent to subscriber equipment from PC，Delay except the time，PC and subscriber equipment can't detect packet and have passed through the transmission of the Internet.Equally, contrary path, subscriber equipment can deliver a packet to PC, it is achieved bidirectional data transfers.

Fig. 2 is the communication process of arp address resolution protocol, PC IP address is 192.168.1.100, subscriber equipment Ethernet interface address is 192.168.1.101, the telecommunication network adapter identification information code ID=12345-1, additional counter labelling M=123 that PC uses；The telecommunication network adapter identification information code ID=12345-2, additional counter labelling M=123 that subscriber equipment uses.2 the telecommunication network adapters used have identical additional counter labelling, and have different identification information code ID.

Sending ARP request from PC as shown in Figure 2, big arrow indicated number is according to the direction of transfer of bag.The Ethernet data comprising ARP request data is coated the ID code (ID=12345-1) and the M(M=123) code that add telecommunication network adapter after telecommunication network adapter network interface receives, it is then sent to public network server, data are remained untouched and issue the telecommunication network adapter (ID=12345-2) of pairing by public network server, and Ethernet data bag is sent to after finally removing ID code and M the Ethernet interface of subscriber equipment.

Subscriber equipment will automatically reply after receiving ARP request, send an ARP to telecommunication network adapter (ID=12345-2) and reply packet, identical process, telecommunication network adapter (ID=12345-2) transfers a packet to telecommunication network adapter (ID=12345-1) by the Internet and public network server, and last PC receives the ARP of subscriber equipment and replys.

In addition to the implementation, this utility model also includes the technical scheme that other embodiments, all employing equivalents or equivalence substitute mode are formed, and all should fall within this utility model scope of the claims.

Claims

null1. the remote network control system based on VLAN，It is characterized in that including in the same network segment in IP address and be installed on the LUT of local user and another is installed on the remote client terminal of remote client，This remote client terminal is installed on controlled industrial control equipment，Described LUT is connected with the public network server being connected on the internet respectively through a telecommunication network adapter with remote client terminal，Described telecommunication network adapter is by local network interface chip，Internet interface chip and arm processor are constituted，Local network interface chip and internet interface chip are connected by SPI serial line interface with arm processor，Local network interface chip is connected with the network interface of LUT and remote client terminal respectively，Internet interface chip is connected to the public network server on the Internet.