CN111277471A

CN111277471A - Quick detection device of no central network connection

Info

Publication number: CN111277471A
Application number: CN202010112330.5A
Authority: CN
Inventors: 朱明�; 潘进豪; 吴国伟; 孙浩博
Original assignee: Dalian University of Technology
Current assignee: Dalian University of Technology
Priority date: 2020-02-24
Filing date: 2020-02-24
Publication date: 2020-06-12
Anticipated expiration: 2040-02-24
Also published as: CN111277471B

Abstract

The invention belongs to the technical field of network cable detection devices, and particularly relates to a centerless network connection rapid detection device which mainly comprises a plurality of detection units 1 and a communication bus 2; the detection unit 1 consists of a switch 3 and a microcontroller 4; the communication bus 2 is a 485 bus, and the network topology adopts a bus type structure with matched terminals, namely, one bus is adopted to connect all the detection units 1 in series. The invention detects a section of network connection through a plurality of detection units, can realize the rapid positioning of the disconnected position of the network for a local area network topological structure which uses a large number of network cables, and simultaneously, all the detection units are communicated through a 485 bus, thus the price is low, and the detection method is simple and effective.

Description

Quick detection device of no central network connection

Technical Field

The invention belongs to the technical field of network cable detection devices, and particularly relates to a centerless network connection rapid detection device.

Background

Some large-scale local area network topologies require a large number of networks connecting each node. Common network connections are mainly network wires, coaxial cables and optical cables, the most widely used being network wires in local area networks. The normal network cable connection among each node is the guarantee of the normal operation of the whole local area network topology structure. The traditional network cable detection device cannot rapidly detect which network cable is disconnected in the local area network topology structure detection using a large number of network cables, so that the whole network structure is paralyzed for a long time.

Disclosure of Invention

In order to solve the above problems, the present invention provides a fast detection device for centerless network connection.

The technical scheme of the invention is as follows:

a kind of fast checkout gear without central network connection, mainly made up of multiple detecting element 1 and communication bus 2;

the detection unit 1 consists of a switch 3 and a microcontroller 4;

the switch 3 is a double-port switch, and is connected with a node of a network topology structure to be detected through a network cable 8, so that network nodes successfully connected to the same switch 3 can realize communication;

the switch 3 and the microcontroller 4 are connected through two wires, the wires are used for transmitting the network port connection state of the switch 3, and one wire correspondingly transmits the information of one network port connection state; when the network port is successfully connected, the corresponding lead is set to be at a high level or a low level; when the network port is disconnected, the corresponding wire is set to be at the opposite level;

the microcontroller 4 judges whether the detected network connection is disconnected or not by detecting the level of a wire connected with the switch 3, and transmits information to the outside through the communication bus 2;

the communication bus 2 is a 485 bus, and the network topology adopts a bus type structure with matched terminals, namely, one bus is adopted to connect the detection units 1 in series.

When in use, the network cable 8 connected with the two CPN nodes without the central network is taken down, and each CPN node without the central network is connected with the switch 3 of the detection unit 1 through the network cable 8; originally, two connected CPN nodes of the centerless network are respectively connected to one detection unit 1 through network cables 8, and each detection unit 1 detects one connection edge of the original network structure.

The invention has the beneficial effects that: according to the centerless network connection rapid detection device, a plurality of detection units are used for detecting one-section network connection, the purpose of rapidly positioning the disconnected position of a network can be achieved for a local area network topological structure using a large number of network cables, and meanwhile, all the detection units are communicated through 485 buses, so that the price is low, and the advantages of simplicity and effectiveness are achieved.

Drawings

FIG. 1 is a schematic diagram of a centerless network connection rapid detection apparatus according to the present invention;

FIG. 2 illustrates a network structure detected in an embodiment of the present invention;

fig. 3 is a flow chart of the present invention, wherein (a) is two adjacent centerless network CPN nodes connected by wireless network, and (b) is two adjacent centerless network CPN nodes connected by the detection unit.

In the figure: 1 a detection unit; 2 a communication bus; 3, a switch; 4, a microcontroller; 5, a CPN network matrix of a centerless network; 6, a CPN node a of the centerless network; 7, a CPN node b of a centerless network; 8 mesh wires.

Detailed Description

The following further describes the specific embodiments of the present invention with reference to the technical solutions and the drawings of the specification.

As shown in fig. 1 and fig. 3, a centerless network connection rapid detection device mainly comprises a plurality of detection units 1 and a communication bus 2; the detection unit 1 consists of a switch 3 and a microcontroller 4; the switch 3 is a double-port switch and is connected with a node of a network topology structure to be detected through a network cable 8 during working; one end of the microcontroller 4 is connected with the switch 3 through two wires, and the other end is connected with the communication bus 2; the communication bus 2 is a 485 bus, and the network topology adopts a bus type structure with matched terminals, namely, a bus is adopted to connect all the detection units 1 in series;

as shown in fig. 2, there is a network topology structure to be detected in an actual project, where the network structure has a large number of CPN nodes without a central network, and it is necessary to ensure that the network connections 8 between the CPN nodes without a central network are normal to ensure that the network works normally.

When the device is arranged, the network cable 8 connecting the two CPN nodes without the central network needs to be taken down, and then each CPN node without the central network is connected with the interface of the switch 3 of the corresponding detection unit 1 through the network cable 8. In this embodiment, the network cable 8 is a twisted pair, and as shown in fig. 3, the CPN node a6 of the centerless network in the CPN matrix 5 of the original centerless network is connected to the CPN node b7 of the centerless network through the network cable 8. The method comprises the following specific steps:

the method comprises the following steps: as shown in fig. 3 (a), the network cable 8 connecting the CPN node a6 without the central network and the CPN node b7 without the central network in the CPN matrix 5 without the central network is removed;

step two: as shown in fig. 3 (b), the centerless network CPN node a6 and the centerless network CPN node b7 are respectively connected to two interfaces of the switch 3 of the detection unit 1 through the network cable 8;

step three: and the processing modes of the first step and the second step are repeated by other connected CPN nodes of the centerless network in the CPN matrix 5, the original two connected CPN nodes of the centerless network are respectively connected to one detection unit 1 through network cables 8, and each detection unit 1 detects one connecting edge of the original network structure.

At this time, all the detection units 1 are connected in series with the communication bus 2 for communication; when the network cable 8 is connected normally, two CPN nodes of the centerless network connected to the same switch 3 can communicate normally, the high level of the lead corresponding to the network port of the switch 3 indicates the normal connection state, and the microcontroller 4 connected correspondingly to the switch 3 transmits the connection state information through the communication bus 2; when a network cable 8 of a certain non-central network CPN node connected with the switch 3 is disconnected, a wire corresponding to a network port of the switch 3 is set to be at a low level, the microcontroller 4 connected with the switch 3 detects the low level, and a signal of disconnecting the network cable 8 is transmitted through the communication bus 2, so that the specific position of disconnecting the network cable 8 is quickly positioned.

Claims

1. A centerless network connection rapid detection device is characterized in that the centerless network connection rapid detection device mainly comprises a plurality of detection units (1) and a communication bus (2);

the detection unit (1) consists of a switch (3) and a microcontroller (4);

the switch (3) is a double-port switch, and is connected with a node of a network topology structure to be detected through a network cable (8), so that network nodes successfully connected to the same switch (3) can realize communication;

the switch (3) is connected with the microcontroller (4) through two wires, the wires are used for transmitting the network port connection state of the switch (3), and one wire correspondingly transmits the information of the network port connection state; when the network port is successfully connected, the corresponding lead is set to be at a high level or a low level; when the network port is disconnected, the corresponding wire is set to be at the opposite level;

the microcontroller (4) judges whether the detected network connection is disconnected or not by detecting the level of a lead connected with the switch (3), and transmits information to the outside through the communication bus (2);

the communication bus (2) is a 485 bus, and the network topology adopts a bus type structure with matched terminals, namely, one bus is adopted to connect all the detection units (1) in series.

2. The device for fast detecting the connection of the centerless network according to claim 1, characterized in that, during detection, the network cable (8) connecting the two nodes of the centerless network CPN is taken down, and each node of the centerless network CPN is connected with the switch (3) of the detecting unit (1) through the network cable (8); originally, two CPN nodes of the connected centerless network are respectively connected to a detection unit (1) through network cables (8), and each detection unit (1) detects a connection edge of the original network structure.