CN202737901U

CN202737901U - 1553B bus automatic switching system

Info

Publication number: CN202737901U
Application number: CN 201220282515
Authority: CN
Inventors: 王兰芳; 李超; 何凯; 王月荣
Original assignee: BEIJING SHIZHU SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: BEIJING SHIZHU SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2012-06-15
Filing date: 2012-06-15
Publication date: 2013-02-13
Anticipated expiration: 2022-06-15

Abstract

The utility model discloses a 1553B bus automatic switching system which includes a bus controller, remote terminals and 1553B buses. The bus controller includes a bus state management module, a storage module, and a bus switching control module. The bus state management module monitors the bus communication state in real time, when the communication is abnormal, the bus switching control module carries out the message retry, if the mistake still exists, the bus switching control module switches a present bus to a standby bus. Compared with the prior art which uses the host computer control to realize the bus switching, and the bus switching only aims at one message, the 1553B bus automatic switching system uses the bus controller to realize the automatic bus switching and aims at a certain remote terminal, after the bus automatic switching, the rest messages related to the remote terminal are not transmitted by the wrong bus, but are automatically transmitted by the standby bus, so the operation is easy and convenient and is high in real-time. The 1553B bus automatic switching system accords with the real application scene when carrying out the bus switching control to a specific remote terminal.

Description

The system that a kind of 1553B bus automaticallyes switch

Technical field

The utility model relates to the avionics field, particularly a kind of system of 1553B bus automatic switchover.

Background technology

The MIL-STD-1553B bus is called for short the 1553B bus, is a kind of serial multiplex data bus standard that 20 century 70s are announced by the U.S..Be applied to the earliest on the aircraft, be used for solve aircraft and control interconnected and a large amount of transfer of data between each subsystem such as computer, flat aobvious, navigation, transducer, plug-in management.Through the development in more than 20 years, very ripe at present, be widely used in the fields such as aviation, surface car, naval vessels, satellite both at home and abroad.

The 1553B bus has the advantages such as real-time is high, expansion is flexible, antijamming capability is strong.For improving system survivability, 1553B adopts redundant bus.As shown in Figure 1, redundant bus is to provide multiple bus between bus control unit and remote terminal, only carries out transmission of messages a bus in any given time, and other bus is in Status of Backups, when detecting message error, switch to backup bus sending and receiving message.Present known technology is to realize bus switch by PC control, when message is made mistakes by the retry of this message of PC control and switch to the backup bus and send, the deficiency that this technical scheme exists is, just carry out for a certain message, rather than for certain remote terminal, after causing error messages to pass through retry or the correct transmitting-receiving of bus switch, all the other message relevant with this remote terminal still send from the bus of mistake, so need to carry out retry and bus switch to every error messages; More loaded down with trivial details.

Summary of the invention

The purpose of this utility model is to solve by PC control to realize bus switch, only carry out for a certain message, rather than for certain remote terminal, after causing error messages to pass through retry or the correct transmitting-receiving of bus switch, all the other message relevant with this remote terminal still send from the bus of mistake, so need to carry out to every message the problem of retry and bus switch.

To achieve these goals, the system that the utility model provides a kind of 1553B bus to automatically switch comprises bus control unit, remote terminal, 1553B bus, is connected also communication by described 1553B bus between described bus control unit and the described remote terminal.Described bus control unit comprises bus state administration module, memory module, bus switch control module.

Described bus state administration module, an end connect described 1553B bus, and the other end connects described memory module, and whether the communication state that is used between the described bus control unit of Real-Time Monitoring and the described remote terminal is normal, and the result is write described memory module.

Described memory module, one end connects described bus state administration module, the other end connects described bus switch control module, be divided into remote terminal numbering area, bus number district, communication state tag slot, store respectively the communication status indicator whether normally between bus number, current this remote terminal and the described bus control unit that remote terminal numbering, current this remote terminal and described bus control unit communication use.

Described bus switch control module, one end connects described memory module, the other end connects described 1553B bus, be used for reading the information of described memory module, and when described status indicator is communication abnormality, carry out the error message retry, when still having mistake, current bus switch is arrived bus for subsequent use, and the information in the described memory module of real-time update.

Preferably, the system that described 1553B bus automaticallyes switch comprises a plurality of remote terminals.

Preferably, the system that described 1553B bus automaticallyes switch comprises many buses for subsequent use.

Preferably, described bus control unit adopts FPGA to realize.

Preferably, described bus control unit adopts protocol chip to realize.

Preferably, described remote terminal adopts FPGA to realize.

Preferably, described remote terminal adopts protocol chip to realize.

As shown from the above technical solution, the utility model adopts bus control unit to realize that automatic bus switches, for certain remote terminal, after bus automaticallyes switch, all the other message relevant with this remote terminal no longer send from wrong bus, but the bus after switch sends automatically, and are simple and convenient, real-time is high, and when carrying out bus switch control for concrete remote terminal, more realistic application scenarios.

Below by drawings and Examples, the technical solution of the utility model is described in further detail.

Description of drawings

Fig. 1 is the system schematic of the use 1553B redundant bus mentioned of the utility model background technology.

The system architecture diagram that the 1553B bus that Fig. 2 provides for the utility model automaticallyes switch.

Fig. 3 is the memory module configuration schematic diagram that 1553B bus automatic switchover system described in the utility model comprises.

Fig. 4 is that 1553B bus automatic switchover system described in the utility model is realized the workflow diagram that bus automaticallyes switch.

Embodiment

As shown in Figure 2, the system architecture diagram that the 1553B bus that provides for the utility model automaticallyes switch.The system that described 1553B bus automaticallyes switch comprises bus control unit 10, remote terminal 20,1553B bus 30, and bus control unit 10 is connected and communication by 1553B bus 30 with remote terminal 20.The system that described 1553B bus automaticallyes switch comprises a remote terminal at least, preferably includes a plurality of remote terminals; At least comprise a bus for subsequent use, preferably include many buses for subsequent use.

Bus control unit 10 comprises bus state administration module 11, memory module 12, bus switch control module 13.Bus state administration module 11, one ends connect 1553B bus 30, and the other end connects memory module 12, and whether the communication state that is used between Real-Time Monitoring bus control unit 10 and the remote terminal 20 is normal, and the result is write memory module 12.

Memory module 12, one ends connect bus state administration module 11, and the other end connects bus switch control module 13.As shown in Figure 3, the memory module configuration schematic diagram that comprises for 1553B bus automatic switchover system described in the utility model.Whether normally memory module 12 is divided into remote terminal numbering area 121, bus number district 122, communication state tag slot 123, store respectively the communication status indicator between bus number, current this remote terminal and the described bus control unit that remote terminal numbering, current this remote terminal and described bus control unit communication use.

Bus switch control module 13, one end connects memory module 12, the other end connects 1553B bus 30, be used for reading the information of memory module 12, and when described status indicator is communication abnormality, carry out the error message retry, when still having mistake, current bus switch is arrived bus for subsequent use, and the information in the real-time update memory module 12.

Bus control unit 10 preferred FPGA realization, for example the XC 3S4000 of adopting; Can also adopt protocol chip to realize, for example BU-6517X.Remote terminal 20 preferred FPGA realization, for example XC3S200 of adopting; Can also adopt protocol chip to realize, for example BU-64703.

As shown in Figure 4, realize the workflow diagram that bus automaticallyes switch for 1553B bus automatic switchover system described in the utility model.The system that described 1553B bus automaticallyes switch, in the process of sending and receiving message, whether the bus state administration module Real-Time Monitoring communication that bus control unit comprises is normal, when communication is normal, the 1553B bus is normally carried out the work of transmission of messages, counter keeps cleared condition, until transmission of messages finishes.During communication abnormality, at first carry out the error message retry, concrete operations are that counter adds 1, resends and receipt message; If can correctly transmit through retry message, counter O reset, transmission of messages finishes; If retry is mistake still, then carry out bus switch, concrete operations are, counter adds 1, and this hour counter is added to 2, satisfies the bus switch condition, counter O reset, switch to simultaneously the backup bus and send message, and the information in the updated stored device, comprise that bus number, the communication state after the switching identifies.Behind the bus switch, the bus after switching is adopted in follow-up communication between bus control unit and this remote terminal, does not re-use the bus of makeing mistakes.

Can find out from the above-mentioned course of work, the utility model realizes that by bus control unit automatic bus switches, not to carry out for a certain message, but for certain remote terminal, behind the bus switch, all the other message relevant with this remote terminal no longer send from the bus of mistake, do not need every message is carried out wrong retry and bus switch, simple and convenient, real-time is high, and carries out bus switch when control, more realistic application scenarios for concrete remote terminal.

It should be noted that at last: above embodiment is only in order to the technical solution of the utility model to be described but not limit it, although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment or be equal to replacement the technical solution of the utility model, and these modifications or be equal to replacement and also can not make amended technical scheme break away from the spirit and scope of technical solutions of the utility model.

Claims

1. the system that automaticallyes switch of a 1553B bus, comprise bus control unit, remote terminal, 1553B bus, be connected and communication by described 1553B bus between described bus control unit and the described remote terminal, it is characterized in that: described bus control unit comprises bus state administration module, memory module, bus switch control module;

Described bus state administration module, an end connect described 1553B bus, and the other end connects described memory module, and whether the communication state that is used between the described bus control unit of Real-Time Monitoring and the described remote terminal is normal, and the result is write described memory module;

Described memory module, one end connects described bus state administration module, the other end connects described bus switch control module, be divided into remote terminal numbering area, bus number district, communication state tag slot, store respectively the communication status indicator whether normally between bus number, current this remote terminal and the described bus control unit that remote terminal numbering, current this remote terminal and described bus control unit communication use;

2. the system that automaticallyes switch of a kind of 1553B bus according to claim 1, it is characterized in that: the system that described 1553B bus automaticallyes switch comprises a plurality of remote terminals.

3. the system that automaticallyes switch of a kind of 1553B bus according to claim 1, it is characterized in that: the system that described 1553B bus automaticallyes switch comprises many buses for subsequent use.

4. the system of a kind of 1553B bus automatic switchover according to claim 1 is characterized in that: described bus control unit employing FPGA realization.

5. the system of a kind of 1553B bus automatic switchover according to claim 1 is characterized in that: the realization of described bus control unit employing protocol chip.

6. the system of a kind of 1553B bus automatic switchover according to claim 1 is characterized in that: described remote terminal employing FPGA realization.

7. the system of a kind of 1553B bus automatic switchover according to claim 1 is characterized in that: the realization of described remote terminal employing protocol chip.