CN218829982U - Device with monitoring function of both igsmr interface and Um interface - Google Patents

Abstract

The utility model discloses a device that possesses igsmr interface and Um interface monitor function simultaneously, its characterized in that: the device with the monitoring function of both the igsmr interface and the Um interface consists of a CPU small system, a USB HUB, a switching chip, an igsmr acquisition interface, a serial port expansion chip, a storage module, the Um acquisition interface, an analog link unit, an AD unit, an FPGA and a service interface; the igsmr acquisition interface is in a physical form of two VGAs 15, a rear-end signal is connected with the differential-to-single-end circuit after passing through a high-resistance bridge, a signal line output by the single-end circuit is isolated by an optical coupler, and the differential-to-single-end and the optical coupler isolation circuit are powered by an isolation power supply; the Um acquisition interface is 3 radio frequency interfaces, one of which is directly coupled with the radio frequency uplink signal by a coupling antenna and is connected to the uplink analog link unit; the other two interfaces are connected in series with the rear of a vehicle-mounted antenna feeder system of the train MT to be connected with a circulator to isolate signals and are connected to a downlink analog link unit.

Description

Device with monitoring function of both igsmr interface and Um interface

The technical field is as follows:

the utility model relates to a communication monitoring technology field especially relates to a device that possesses igsmr interface and Um interface monitor function simultaneously.

(II) background art:

at present, the informatization construction of railways is being vigorously developed in China, and the Chinese train operation control system CTCS-3 is being widely popularized and applied.

In the CTCS-3 system, as shown in FIG. 1: the train protection module ATP is connected with a vehicle-mounted mobile terminal (also called a vehicle-mounted radio station) MT through an igsmr interface, and the MT communicates with the BTS through an air interface Um. Therefore, to monitor the whole wireless communication system in all directions, the data of the igsmr interface and the Um interface must be monitored at the same time.

The data obtained by the overall monitoring of the two interface data can be specifically analyzed. When a fault occurs, the fault problem can be accurately positioned; the GSM-R network can be optimized through the recorded data at ordinary times; the wireless network state of a specific railway line can be deeply known, and relevant research is carried out based on actual data.

The utility model discloses possess the device of igsmr interface and Um interface monitor function simultaneously, the integrated level is high, and is miniaturized, can satisfy on-vehicle requirement, provides the powerful support for igsmr interface and Um interface control.

(III) the invention content:

possess device of igsmr interface and Um interface monitoring function simultaneously, mainly constitute by CPU microsystem, USB HUB, exchange chip, igsmr collection interface, serial ports extension chip, storage module, um collection interface, simulation link unit, AD unit, FPGA, service interface, two integrated circuit boards about falling into occupy CPCI machine case two trench.

The CPU subsystem is mainly used for the functions of equipment management, peripheral connection, file storage, system upgrading and the like.

The USB HUB is mainly used for expanding the USB of the CPU, the expanded USB is used for connecting a serial port chip and a storage module, and meanwhile, one path of USB interface is output to a panel.

The exchange chip is used for connecting the CPU and the FPGA and expanding the service interface.

Because the on-vehicle has two sets of ATP and MT systems of activestandby, consequently has two igsmr interfaces, and it needs the collection ability of 4 RS422 interfaces to do two-way collection, consequently the utility model provides an igsmr collection interface adopts the physical form to be VGA 15's RS422 interface, realizes the RS422 signal acquisition of two directions in VGA15, consequently the RS422 signal of the all directions of activestandby link is gathered to two VGA15 syntactical.

The serial port expansion chip is mainly used for collecting data processed by the level of the igsmr collection interface and uploading the data to the CPU.

And the storage module is used for locally storing the acquired data of the igsmr interface and the Um interface.

One of the 3 radio frequency interfaces of the Um acquisition interface is connected with a radio frequency antenna to directly couple radio frequency uplink signals, the coupling antenna is close to the MT position, and the transmission power of the uplink signals of the MT is large, so that the uplink signals can be directly coupled; the other two interfaces are connected in series with the back of a vehicle-mounted antenna feeder system of the MT of the train to be connected with the circulator to isolate signals, and because a train body is completely closed, downlink signals can be collected only through the vehicle-mounted antenna feeder system of the MT, and the circulator is required to be isolated in order not to influence the normal use of the feeder.

The analog link unit is divided into an uplink part and a downlink part, and each part consists of a radio frequency link, a mixer and an intermediate frequency link.

The AD unit is used for analog-to-digital conversion, is also divided into an uplink part and a downlink part, and sends an analog signal to the FPGA at the rear end for processing after being digitalized.

The FPGA is mainly used for processing signals converted by the AD unit, restoring data of the Um interface, connecting the data to the exchange chip through the SGMII interface, and simultaneously sending the data to the CPU and the service interface.

The service interface is a front part and a rear part, the front panel part adopts 2 kilomega network ports in RJ45 form, and the rear interface is connected with the back panel through a connector, which is also the 2 kilomega network port.

The device consists of an upper layer of board card and a lower layer of board card, wherein the joint of the upper board card and the lower board card is an interface between an AD unit and an FPGA, and can separate analog parts from digital parts to avoid interference. The two side board cards occupy two slot positions of the CPCI case, and the rear service interface can communicate with other board cards in the case.

(IV) description of the drawings:

FIG. 1 is a schematic diagram of a railway CTCS-3 system communication;

FIG. 2 is a view showing the internal structure of the apparatus;

FIG. 3 is a schematic diagram of the acquisition of the igmsr interface;

FIG. 4 is a schematic illustration of the isolation of the igmsr appliance;

FIG. 5 is a schematic diagram of the Um interface acquisition;

(V) specific embodiment:

for clarity of reference, some specific english abbreviations used are summarized below:

CTSC: chinese Train operation Control System;

ATP: automatic Train Protection, train overspeed Protection system;

MT: mobile Terminal, mobile Terminal;

STU-V: safe Transmission Unit-Vehicle, vehicle carried Safe Transmission Unit;

GCD: general Crypt Device, universal encryption module;

igmsr: interface GSM-R, vehicle wireless interface;

RS422: a level standard of a serial port;

CPCI: compact Peripheral Component interconnect, a system architecture;

and Um: air interface for GSM;

FPGA: field Programmable Gate Array, a Programmable device;

SGMII: serial Gigabit Media Independent Interface, serial Gigabit MAC;

USB: universal Serial Bus, a Serial Bus;

VGA: video Graphics Array, herein designated as one type of connector;

in order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is made in conjunction with the accompanying drawings and embodiments. It should be noted that the specific embodiments described herein are only for explaining the present invention, and are not used to limit the present invention.

Possess device of igsmr interface and Um interface monitor function simultaneously, as shown in fig. 2: mainly comprises a CPU small system, a USB HUB, an exchange chip, an igsmr acquisition interface, a serial port expansion chip the device comprises a storage module, a Um acquisition interface, an analog link unit, an AD unit, an FPGA and a service interface.

The CPU small system comprises a DDR, a storage FPASH and the like, wherein a parallel bus IFC interface of the CPU small system is connected with the FPGA for loading and controlling the FPGA, meanwhile, the CPU small system is connected with the FPGA through an SGMII interface, a USB interface of the CPU small system is connected with a USB HUB, and two SGMII network ports of the CPU small system are connected with a switching chip.

The upper connector of the USB HUB is connected with the USB interface of the CPU, and the lower connector is respectively connected with the serial port expansion chip, the storage module and one path of USB interface to the panel.

The switching chip is connected with the CPU through an RGMII interface, connected with the FPGA through an SGMII interface, connected with the RJ45 of the panel through 2 own 1000base-t interfaces to form a front service interface, and connected with the backplane connector through 2 own 1000base-t interfaces to form a rear service interface.

The physical form of the igsmr acquisition interface is two VGAs 15, one acquisition diagram of one acquisition interface is shown in fig. 3, each interface can acquire bidirectional communication signals between 1-path GDC and MT, and all signal acquisition of a bidirectional complete serial port protocol is realized. RS422 signal acquisition in two directions is realized in one VGA15, so that the two VGAs 15 can acquire RS422 signals in all directions of the main and standby links.

The processing of the VGA15 back-end signal for a pair of differential signals RXD +/-is shown in FIG. 4: other signals are processed in the same manner. The signal is connected with the differential-to-single-ended circuit after passing through the high impedance span, and the signal line output by the single-ended circuit is isolated by an optical coupler. The differential-to-single end and optical coupling isolating circuit adopts an isolating power supply to supply the Vdc1, so that the electrical isolation of the whole igsmr acquisition interface is realized.

The storage module is connected with the USB HUB through a USB interface and connected with the SD card connector through the MMC controller, and can be used for inserting the SD card to store data.

The Um acquisition interface is 3 radio frequency interfaces, one of which is directly coupled with a radio frequency uplink signal by a coupling antenna and is connected to an uplink analog link unit; the other two interfaces are connected in series with the rear of a vehicle-mounted antenna feeder system of the train MT to be connected with a circulator to isolate signals, and are connected to a downlink analog link unit, as shown in fig. 5.

The analog link unit is divided into an uplink part and a downlink part, each part consists of a radio frequency link, a mixer and an intermediate frequency link in sequence, the radio frequency link is connected with a Um interface, and the intermediate frequency link is connected with an AD unit.

The AD unit is used for analog-to-digital conversion, and is also divided into an uplink part and a downlink part, wherein the two parts are respectively connected with the analog link unit and the FPGA through a parallel interface.

The FPGA is connected with the AD unit through a parallel interface, is connected with the CPU through an SGMII interface, is connected with the switching chip through the SGMII interface, and is connected with the CPU through an IFC interface for the management and loading of the FPGA.

The service interface is a front part and a rear part, the front panel part adopts 2 kilomega network ports in RJ45 form, and the rear interface is connected with the back panel through a connector, which is also the 2 kilomega network port. The four gigabit net ports are all connected with a switching chip.

The device is divided into two boards in physical form, adopts CPCI framework and occupies two slot positions, the two boards are connected by a buckle plate connector, the joint of the upper board and the lower board between the two boards is an interface for connecting the FPGA and the AD unit, as shown in figure 2, the dotted line part in figure 2 is an upper board part, and the other parts are lower board parts.

The above-mentioned preferred embodiments of the present invention are not intended to limit the present invention, and all modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims (7)

1. The utility model provides a possess simultaneously igsmr interface and Um interface monitor function's device which characterized in that: the device with the monitoring function of the igsmr interface and the Um interface simultaneously consists of a CPU small system, a USB HUB, a switching chip, an igsmr acquisition interface, a serial port expansion chip, a storage module, a Um acquisition interface, an analog link unit, an AD unit, an FPGA and a service interface.

2. The device of claim 1, wherein the device has both igsmr interface and Um interface monitoring functions, and is characterized in that: the igsmr acquisition interface is in a physical form of two VGAs 15, a rear-end signal is connected with a differential-to-single-end circuit after passing through a high-resistance cross-connection, a signal line output by the single-end circuit is isolated by an optical coupler, and the differential-to-single-end and optical coupler isolation circuits are powered by an isolation power supply, so that the isolation of an electric appliance of the whole igsmr acquisition interface is realized.

3. The device with both the igsmr interface and the Um interface monitoring function according to claim 1, wherein: the Um acquisition interface is 3 radio frequency interfaces, one of which is directly coupled with the radio frequency uplink signal by a coupling antenna and is connected to the uplink analog link unit; the other two interfaces are connected in series with the rear of a vehicle-mounted antenna feeder system of the train MT to be connected with a circulator to isolate signals and are connected to a downlink analog link unit.

4. The device with both the igsmr interface and the Um interface monitoring function according to claim 1, wherein: the service interface is a front part and a rear part, the front panel part adopts 2 RJ 45-shaped gigabit ports, and the rear interface is connected with a back panel through a connector, which is also a 2 gigabit port.

5. The device with both the igsmr interface and the Um interface monitoring function according to claim 1, wherein: the device comprises an upper layer of board card and a lower layer of board card, wherein the joint of the upper board card and the lower board card is an interface between an AD unit and an FPGA, and a buckle plate connector is used at the interface.

6. The device with both the igsmr interface and the Um interface monitoring function according to claim 1, wherein: the device adopts a CPCI structure and occupies two slot positions.

7. The device with both the igsmr interface and the Um interface monitoring function according to claim 1, wherein: the upper connector of the USB HUB is connected with the USB interface of the CPU, and the lower connector is respectively connected with the serial port expansion chip, the storage module and one path of USB interface to the panel.

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