CN219554997U

CN219554997U - Enhanced 1553 bus network routing device

Info

Publication number: CN219554997U
Application number: CN202223027695.1U
Authority: CN
Inventors: 苗军民; 周海亮; 毛春城
Original assignee: Luoyang Institute of Electro Optical Equipment AVIC
Current assignee: Luoyang Institute of Electro Optical Equipment AVIC
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-08-18
Anticipated expiration: 2032-11-14

Abstract

The utility model provides an enhanced 1553 bus network routing device, and relates to the technical field of digital data bus network routing devices. In order to solve the problem that the number of communication terminals in the traditional enhanced 1553 bus network is limited, the utility model provides an enhanced 1553 bus network routing device. The routing device comprises at least one routing unit, wherein the at least one routing unit is bridged between a bus controller BC and a remote terminal RT, and expands a single-path enhanced 1553 bus port connected with the BC into N paths, so that the number of enhanced 1553 bus communication RT is M multiplied by N, wherein M is the number of initial communication RT. The device can expand a single BC communication port to N, so that the number of communicable RTs of the enhanced 1553 bus increases multiple times in units of N. The device is mainly applied to the airborne suspended objects and the management system thereof, so that the number of suspended objects which can be managed by the airborne suspended object management system is greatly increased.

Description

Enhanced 1553 bus network routing device

Technical Field

The utility model relates to the technical field of digital data bus networks, in particular to an enhanced 1553 bus network routing device.

Background

The enhanced 1553 bus is a digital data bus meeting the SAE AS5652 standard of 10Mbps digital time division command/response type multiplexing data bus. The bus is mainly used for digital data communication between the onboard suspension management system and the suspension.

The routing device is a device for realizing electrical interconnection and data exchange between communication terminals in a bus network. It will receive a packet from one port and forward it to the other port in accordance with the destination address of the packet. The SAE AS5652 standard specifies that the enhanced 1553 bus network uses a star topology AS shown in fig. 1. The topology includes a Bus Controller (BC) and a Remote Terminal (RT). The enhanced 1553 bus network specified by the SAE AS5652 standard does not contain routing devices. The BC achieves communication with a maximum of 31 RTs, limited by the RT address field of the bus instruction word and status word having only 5 BIT. This cannot meet the application requirements of the hundreds of RT numbers in engineering practice.

Therefore, there is a need to design an enhanced 1553 bus network routing device to solve the above problems.

Disclosure of Invention

In order to solve the problem that the number of communication terminals in the traditional enhanced 1553 bus network is limited, the utility model provides an enhanced 1553 bus network routing device.

According to one aspect of the utility model, the utility model provides the following technical scheme:

an enhanced 1553 bus network routing device is characterized in that: the routing device comprises at least one routing unit, wherein at least one routing unit is bridged between a bus controller BC and a remote terminal RT, and a single-path enhanced 1553 bus port connected with the BC is expanded into N paths, so that the number of enhanced 1553 bus communication RT is M multiplied by N, wherein M is the number of initial communication RT.

As a preferable scheme of the enhanced 1553 bus network routing device, the routing unit comprises a chassis, an aviation electrical connector and a routing control module, wherein the chassis panel is provided with the aviation electrical connector, and the aviation electrical connector is connected to the routing control module arranged in the chassis through a wire.

As a preferred embodiment of the enhanced 1553 bus network routing device according to the present utility model, the avionic electrical connector comprises: a working power connector, an upstream bus connector and a downstream bus connector; the working power connector is arranged on one side of the chassis panel and is used for connecting a direct current power supply provided by the outside to the routing control module; the upstream bus connector is arranged on a chassis panel on the same side as the working power connector, and is used for connecting a bus interface of the external BC to the routing control module; the downstream bus connector connects the bus interface of the external RT to the routing control module.

As a preferred scheme of the enhanced 1553 bus network routing device, the routing control module comprises a secondary power supply conversion unit and a data processing unit, wherein the secondary power supply conversion unit converts an input direct current power supply into a direct current power supply used by the data processing unit; the data processing unit comprises an FPGA, a clock circuit, a FLASH memory and an SDRAM memory which are electrically connected, data conversion and transceiving driving are completed through an RS485 bus transceiver, and the FPGA realizes routing addressing and data forwarding exchange.

As a preferable scheme of the enhanced 1553 bus network routing device, the input direct current power supply is 28V, and the secondary power supply conversion unit converts the direct current 28V power supply into the direct current 5V power supply used by the data processing unit and converts the direct current 5V power supply into the 3.3V and 1.2V power supplies used by the data processing unit.

As a preferred scheme of the enhanced 1553 bus network routing device, the aviation electric connector adopts a GJB 599III series circular aviation connector.

As the preferred scheme of the enhanced 1553 bus network routing device, the routing control module is installed inside a case by adopting four installation screws, and the case upper cover plate is tightly sealed with the case shell by anti-loosening screws.

As a preferred embodiment of the enhanced 1553 bus network routing device according to the present utility model, the number of the working power connectors, the upstream bus connectors and the downstream bus connectors is 1, 1 and 32, respectively, and the value of N is 32.

Compared with the prior art, the utility model has the following beneficial effects:

(1) The enhanced 1553 bus network routing device provided by the utility model can expand a single-path BC communication port into N paths, such as 32 paths, so that the number of the communication RTs of the enhanced 1553 bus is multiplied by 32. Therefore, the airborne suspended matter management system adopting the enhanced 1553 bus network routing device can greatly increase the number of the suspended matters which can be managed, and has great significance for improving the management capacity of the airborne suspended matters.

(2) The FPGA adopted by the utility model logically analyzes the RT address field value in the instruction word sent by the upstream BC, and then forwards the instruction word and the data word to the downstream RT of the corresponding port. The FPGA logic forwards the status word and the data word sent by the downstream RT to the upstream BC, and simultaneously sets the RT address field value of the status word as a corresponding port number, thereby improving the processing efficiency.

Drawings

FIG. 1 is a basic enhanced 1553 bus network diagram;

FIG. 2 is an enhanced 1553 bus network diagram with routing devices;

FIG. 3 is an exploded view of a routing device;

fig. 4 is a schematic diagram of a routing control module.

Reference numerals in the drawings denote:

wherein: 1-upper cover plate, 2-mounting screw, 3-route control module, 4-machine case, 5-working power connector, 6-upstream bus connector, 7-downstream bus connector.

Detailed Description

The utility model will now be further described with reference to examples, figures:

embodiments of the present utility model will be described in detail below with reference to the attached drawings and specific examples. It should be noted that the drawings provided in this example are only schematic illustrations of the basic concept of the present utility model, and the relevant component ratios in the schematic illustrations are necessarily drawn according to the component dimensions in actual implementation.

The embodiment of the utility model and the implementation process are as follows:

example 1

As shown in fig. 2, an enhanced 1553 bus network routing device includes at least one routing unit, where the routing unit is bridged between a bus controller BC and a remote terminal RT, and expands a single enhanced 1553 bus port connected to BC into N paths, so that the number of enhanced 1553 bus communication RTs is m×n, where M is the number of initial communication RTs.

For example, the N may take on a value of 32, which may extend the 1-way enhanced 1553 bus port connected to the BC to a 32-way enhanced 1553 bus port.

In a preferred embodiment, the number M of initial communications RT is 8, which can meet the requirement.

The routing unit comprises a chassis 4, an aviation electric connector and a routing control module 3, wherein the aviation electric connector is installed on a panel of the chassis 4 and is connected to the routing control module 3 installed inside the chassis 4 through a wire. A sealed cabinet 4 is employed.

The avionic electrical connector comprises 1 working power connector 5, 1 upstream bus connector 6 and 32 downstream bus connectors 7. The working power connector 5 connects an externally supplied direct current 28V power supply to the routing control module 3. The upstream bus connector 6 connects the bus interface of the external BC to the routing control module 3. The downstream bus connector 7 connects the bus interface of the external RT to the routing control module 3.

The route control module 3 includes a secondary power conversion unit and a data processing unit.

The secondary power supply conversion unit converts the input direct current 28V power supply into direct current 5V power supply for the data processing unit to use, and simultaneously converts the direct current 5V power supply into 3.3V and 1.2V power supply for the data processing unit to use.

The data processing unit adopts an RS485 bus transceiver to complete data conversion and transceiving driving, and adopts a programmable logic device (FPGA) to realize routing addressing and data forwarding exchange. The FPGA logic analyzes the RT address field value in the instruction word sent by the upstream BC, and then forwards the instruction word and the data word to the downstream RT of the corresponding port. The FPGA logic forwards the status word and the data word sent by the downstream RT to the upstream BC, and simultaneously sets the RT address field value of the status word to the corresponding port number.

As shown in fig. 3, the routing control module 3 is mounted inside the chassis 4 using four mounting screws 2 and connected to the chassis 4 panel by wires. Wherein, 1 working power connector 5 and 1 upstream bus connector 6 are located at the left side panel of the chassis 4, and 32 downstream bus connectors 7 are located at the front panel of the chassis 4. The connector adopts GJB 599III series circular aviation connector. The upper cover plate 1 of the case 4 is fastened with the case 4 shell through an anti-loosening screw.

As shown in fig. 4, the secondary power conversion unit of the routing control module 3 converts the externally input direct current 28V power into 3.3V power and 1.2V power available to the data processing unit through two-stage power conversion. The first stage converts a direct-current 28V power supply into a 5V power supply; the second stage converts the 5V power supply to a 3.3V power supply and a 1.2V power supply.

As shown in fig. 4, the processing core of the data processing unit of the routing control module 3 adopts an FPGA, a clock circuit, a FLASH memory, and an SDRAM memory as auxiliary circuits. The RS485 transceiver realizes level conversion and transceiving driving of the FPGA CMOS voltage signal and the enhanced 1553 bus signal. The data processing unit is connected with the upstream BC through a 1-way enhanced 1553 bus interface, is connected with the downstream RT through a 32-way enhanced 1553 bus interface, and realizes route addressing and data forwarding exchange through VHDL logic running on the FPGA.

In summary, the above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An enhanced 1553 bus network routing device is characterized in that: the routing device comprises at least one routing unit, wherein the at least one routing unit is bridged between a bus controller BC and a remote terminal RT, and expands a single-path enhanced 1553 bus port connected with the BC into N paths, so that the number of the enhanced 1553 bus communication RT is M multiplied by N, wherein M is the number of initial communication RT; the routing unit comprises a chassis, an aviation electric connector and a routing control module, wherein the aviation electric connector is installed on a chassis panel, and the aviation electric connector is connected to the routing control module installed inside the chassis through a wire.

2. The enhanced 1553 bus network routing device of claim 1, wherein: the avionic electrical connector comprises: a working power connector, an upstream bus connector and a downstream bus connector; the working power connector is arranged on one side of the chassis panel and is used for connecting a direct current power supply provided by the outside to the routing control module; the upstream bus connector is arranged on a chassis panel on the same side as the working power connector, and is used for connecting a bus interface of the external BC to the routing control module; the downstream bus connector connects the bus interface of the external RT to the routing control module.

3. The enhanced 1553 bus network routing device of claim 1, wherein: the routing control module comprises a secondary power supply conversion unit and a data processing unit, wherein the secondary power supply conversion unit converts an input direct current power supply into a direct current power supply used by the data processing unit; the data processing unit comprises an FPGA, a clock circuit, a FLASH memory and an SDRAM memory which are electrically connected, data conversion and transceiving driving are completed through an RS485 bus transceiver, and the FPGA realizes routing addressing and data forwarding exchange.

4. An enhanced 1553 bus network routing device according to claim 3, wherein: the input direct current power supply is 28V, and the secondary power supply conversion unit converts the direct current 28V power supply into a direct current 5V power supply used by the data processing unit and converts the direct current 5V power supply into 3.3V and 1.2V power supplies used by the data processing unit.

5. The enhanced 1553 bus network routing device of claim 1, wherein: the aviation electric connector adopts GJB 599III series circular aviation connector.

6. The enhanced 1553 bus network routing device of claim 1, wherein: the routing control module is installed inside the case by adopting four installation screws, and the case upper cover plate is fastened and sealed with the case shell through the anti-loosening screws.

7. An enhanced 1553 bus network routing device according to claim 2, wherein: the number of the working power connectors, the upstream bus connectors and the downstream bus connectors is 1, 1 and 32 respectively, and the value of N is 32.