CN113098607A - Arrow-ground IO signal transmission system and method based on optical fiber medium - Google Patents

Abstract

The invention discloses an arrow ground IO signal transmission system and method based on optical fiber media, wherein, an arrow system end device comprises a number redundancy processing module and three signal conversion processing modules; the ground system end is symmetrically provided with three signal conversion processing modules and an IO signal redundancy processing module; and the arrow system end and the ground system end transmit signals through three optical fiber cables. The invention realizes the fiber transmission of the rocket ground IO signal of the carrier rocket, and effectively improves the reliability and the real-time property of signal transmission by utilizing a unique three-channel hardware redundancy processing mode. Through the conversion processing of the arrow-ground IO signals, the free configuration of the number of IO interfaces is realized, and the number of cores of the connector is effectively reduced; by adopting the optical fiber medium for transmission, the weight of the cable is reduced, and the electromagnetic compatibility of the cable is obviously enhanced; through the modularized design idea, convenient scheme configuration and upgrading and reconstruction are realized.

Description

Arrow-ground IO signal transmission system and method based on optical fiber medium

Technical Field

The invention relates to an arrow-ground signal transmission system and method, in particular to an arrow-ground IO signal transmission system and method based on an optical fiber medium.

Background

The rocket-ground interface of the traditional carrier rocket mainly comprises an acquisition interface, a communication interface and a power supply interface of IO switching value and analog quantity, and the transmission method adopts a copper medium cable and a connector to directly transmit electric signals. The IO switching value interface is mainly used for monitoring the state of important signals on the arrow and controlling the actions of key signals on the arrow, namely mainly comprising power-on control of equipment on the arrow, battery activation, safety plug opening/closing, main firing command and ignition actions, and occupies a large number of point numbers of the arrow-ground interface, which directly causes the excessive number of cores of the arrow-ground falling connector and the reduction of reliability; meanwhile, the corresponding arrow-ground cable is heavy due to the adoption of copper medium transmission, backup redundancy of each channel cannot be realized, and more importantly, reliable transmission cannot be guaranteed in a strong electromagnetic environment due to the fact that the electric signal is transmitted.

At present, with the development of technology, signal transmission of a backbone optical fiber medium has gradually started to be used in the aerospace field (for example, chinese patent document CN201220408936, a communication system for ground test, launch and control of a launch vehicle rocket), which mainly has the advantages of light volume, strong anti-interference capability, high transmission bandwidth, and the like, and is currently widely used for signal transmission in the communication field. However, the currently and generally adopted optical fiber transmission mode also has the defects that an optical fiber transmission link is not redundant or depends on application layer software redundancy and the like, and the problems of heavy burden, poor reliability and instantaneity and the like of an application layer can be caused. Therefore, if the IO switching value of the rocket-ground interface can be transmitted by adopting an optical fiber medium, and meanwhile, the current defects can be effectively overcome by adopting a hardware redundancy processing mode of a bottom transmission link.

Disclosure of Invention

The invention aims to provide an arrow-ground IO signal transmission system and method based on an optical fiber medium, which solve the problems that the traditional copper medium is used as a carrier or an optical fiber medium carrier, namely the traditional arrow-ground connector has too many cores and low reliability, a copper medium transmission cable is heavy, the redundancy capability of a transmission channel is weak, the electromagnetic compatibility of an arrow-ground cable is poor and the like, and meanwhile, the system is improved aiming at the single-channel optical fiber transmission mode which generally depends on application layer software processing at present;

the purpose of the invention is realized by the following technical scheme:

an arrow ground IO signal transmission system based on optical fiber media comprises an arrow upper system end, a ground system end and an arrow ground optical fiber cable, wherein the arrow upper system end comprises an IO signal redundant processing module and three signal conversion processing modules, the ground system end is symmetrically provided with the three signal conversion processing modules and the IO signal redundant processing module, and the arrow upper system end and the ground system end perform signal transmission through the three arrow ground optical fiber cables;

furthermore, the IO signal redundancy processing module includes a signal acquisition module, a signal voting and driving module, and the signal conversion processing module includes a signal processing module, an electro-optical or photoelectric conversion module, and a power supply module;

the arrow-ground IO signal transmission method based on the optical fiber medium specifically comprises the following steps:

building an arrow-ground IO signal transmission system based on optical fiber medium in the first step

Arrow-ground IO signal transmission system based on optical fiber medium comprises: the system comprises a signal conversion processing module, a transmission cable and an IO signal redundancy processing module;

the signal conversion processing module has the functions of: the coding and decoding of the parallel signals and the serial signals are realized; and electro-optical or photoelectric conversion of serial signals is realized.

The IO signal redundancy processing module has the functions of: as the core of a three-channel hardware redundancy processing mode, the three signal conversion processing modules and the three transmission cables are subjected to redundancy processing, signals input by an external system are converted into TTL signals, and meanwhile, the output signals of the single chip microcomputer are subjected to voting processing of three judgment and two judgment, so that the normal transmission of the whole rocket-ground IO signals is ensured when any one signal processing and transmission link fails;

setting an application scene of the rocket ground IO signal transmission system: according to the system design principle, the application scenes of all the devices are specifically set as follows: the rocket-mounted system end is provided with an IO signal redundancy processing module, the IO signal redundancy processing module is connected to an IO signal interface of the rocket-mounted system end and is simultaneously connected to the three signal conversion processing modules, and each signal conversion processing module is connected to the ground system end through a rocket ground optical fiber cable. The ground system end is the same as the rocket system end, an IO signal redundancy processing module is arranged, is connected to an IO signal interface of the ground system end and is simultaneously connected to the three signal conversion processing modules, and each signal conversion processing module is respectively connected to a corresponding rocket ground optical fiber cable;

second step, simulating the working process of rocket ground IO signal transmission system

According to the system application scene, the work flow of simulating the on-off value opening signal of the rocket system end and transmitting the on-off value opening signal to the ground system end is as follows: the rocket-mounted system end sends out signals of all paths of switching values to an IO signal redundancy processing module of the rocket-mounted system end, the signals are simultaneously output to three signal conversion processing modules after isolation conversion, the signals are respectively transmitted to three signal conversion processing modules of the ground end through three optical fiber cables after being coded and subjected to electro-optical conversion by a single chip microcomputer in the signal conversion processing modules, each signal conversion processing module is respectively transmitted to the IO signal redundancy processing module after being subjected to corresponding photoelectric conversion and decoding processing, a solid-state relay is driven after conversion, output contacts are voted and processed and then output to a ground system end switching value input end, and therefore the function that the rocket-mounted system end switching value signals are output to the ground end is achieved;

the process of transmitting the switching value output signal of the ground system end to the rocket system end is the same as the process, only the transmission direction is opposite, and the description is omitted;

compared with the prior art, the method realizes the fibering of rocket-ground IO signal transmission of the carrier rocket, and adopts a three-channel hardware redundancy mode independent of an application layer compared with the current optical fiber transmission mode generally depending on application layer processing, so that the method has high reliability and real-time performance. Through the conversion processing of the arrow-ground IO signals, the free configuration of the number of IO interfaces is realized, and the number of cores of the connector is effectively reduced; by adopting the optical fiber medium for transmission, the weight of the cable is reduced, and the anti-electromagnetic interference performance of the cable is obviously enhanced; through the modularized design idea, convenient scheme configuration and upgrading and reconstruction are realized.

Drawings

FIG. 1 is a schematic diagram of an arrow-ground IO signal transmission system and method based on an optical fiber medium.

Detailed Description

The specific implementation of the invention takes the arrow system end provided with N-way open-out and M-way open-in as an application example, the specific principle is shown in figure 1, namely the arrow system end comprises an IO signal redundancy processing module and three signal conversion processing modules; the ground end system equipment is symmetrically provided with three signal conversion processing modules and an IO signal redundancy processing module; the rocket system end and the ground system end transmit signals through three rocket ground optical fiber cables;

the IO signal redundancy processing module is a module for carrying out arrow-ground IO signal pre-conversion and redundancy processing and comprises a signal acquisition module and a signal voting and driving module. The signal acquisition module mainly adopts the optical coupler to extract an external outgoing signal, converts the external outgoing signal into a standard TTL level signal and outputs the standard TTL level signal to the single chip microcomputer chip, and the signal acquisition module can set and acquire threshold voltage according to the type of the optical coupler and the electrical parameters of the matching circuit. The signal voting and driving module mainly drives three paths of TTL level signals output by the three single-chip microcomputer chips through Darlington tubes to enhance the driving capability, drives corresponding three solid-state relays, votes load contacts of the solid-state relays and sends the voted load contacts to an open-in end of an external system;

the signal conversion processing module is used for realizing the coding and decoding of signals and the electro-optic and photoelectric conversion of the signals and comprises a signal processing module, an electro-optic or photoelectric conversion module and a power supply module. The signal processing module can select a domestic singlechip as a core processing chip: encoding the N paths of parallel TTL signals after the optical coupling conversion into serial signals according to an HDLC protocol, and outputting the serial signals to an electro-optical conversion module; and the serial signals converted by the photoelectric conversion module are decoded according to a protocol and output to the signal voting and driving module through an IO pin of the single chip microcomputer. The electro-optical or photoelectric conversion module realizes the conversion of serial electric signals and optical signals, and can be realized by adopting a TOSA (transmitter optical subassembly) and a ROSA (receiver optical subassembly) with high magnificence and a peripheral configuration circuit, wherein the central wavelength of the optical signals is 820nm, the maximum transmission distance is 2km, and the transmission rate is 0-5 Mbps. The power supply module converts power supply provided by an external system, provides power supply required by each chip in the module, and realizes isolation from the external system power supply by using the DC/DC power supply isolation module and the filter circuit.

Claims (3)

1. The arrow ground IO signal transmission system based on the optical fiber medium is characterized by adopting a three-channel hardware redundancy processing mode and comprising an arrow-mounted system end, a ground system end and an arrow ground optical fiber cable, wherein the arrow-mounted system end comprises an IO signal redundancy processing module and a signal conversion processing module, the ground system end is symmetrically provided with the signal conversion processing module and the IO signal redundancy processing module, and the arrow-mounted system end and the ground system end transmit signals through the arrow ground optical fiber cable.

2. The arrow-ground IO signal transmission system based on optical fiber medium of claim 1, wherein the IO signal redundancy processing module comprises a signal acquisition module, a signal voting and driving module, and the signal conversion processing module comprises a signal processing module, an electro-optical or photoelectric conversion module and a power supply module.

3. An arrow-ground IO signal transmission method based on an optical fiber medium comprises the following specific steps:

firstly, building an arrow-ground IO signal transmission system based on an optical fiber medium,

the arrow-ground IO signal transmission system based on the optical fiber medium comprises: the signal conversion processing module, the rocket ground optical fiber cable and the IO signal redundant processing module are arranged at the rocket upper system end, the IO signal redundant processing module is connected to an IO signal interface of the rocket upper system end and is simultaneously connected to the three signal conversion processing modules, and each signal conversion processing module is connected to the ground system end through the rocket ground optical fiber cable; the ground system end is the same as the rocket system end, one IO signal redundant processing module is arranged, is connected to an IO signal interface of the ground system end and is simultaneously connected to the three signal conversion processing modules, and each signal conversion processing module is respectively connected to the corresponding rocket ground optical fiber cable;

secondly, simulating the working process of the rocket ground IO signal transmission system,

the rocket-mounted system end sends out signals of all paths of switching values to the IO signal redundancy processing module of the rocket-mounted system end, the signals are simultaneously output to three signal conversion processing modules after isolation conversion, the signals are respectively transmitted to the three signal conversion processing modules of the ground system end through three rocket ground optical fiber cables after being coded and subjected to electro-optical conversion by a single chip microcomputer in the signal conversion processing module, each signal conversion processing module is respectively transmitted to the IO signal redundancy processing module after being subjected to corresponding photoelectric conversion and decoding processing, a solid-state relay is driven after conversion, output contacts are voted and then output to the switching value input end of the ground system end, and therefore the rocket-mounted system switching value signals are output to the ground system end.

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