The comparison acquisition structure and comparison acquisition method of 1553B busesTechnical field
The present invention relates to the technical field of signal acquisition monitoring, the comparison of specifically a kind of 1553B buses acquires structureAnd comparison acquisition method.
Background technology
1553B buses are the abbreviations of MIL-STD-1553 buses, and wherein B is exactly BUS, and MIL-STD-1553 buses are wingedTime-devision system command/response formula multiplexed data bus inside machine.1553B data bus standards are the 1970s by the U.S.A kind of serial multiplex data bus standard announced.1553B buses can hang 31 and far set terminal, and 1553B buses use instruction/soundType communication protocol is answered, there are three types of terminal types for it：Bus control unit BC, remote terminal RT and bus monitor BM；Information formatThere are BC to RT, RT to BC, RT to RT, broadcast mode and system control mode；Transmission medium is Shielded Twisted Pair, 1553B busesCoupled modes have direct-coupling and transformer coupled；1553B buses are multi-redundant bus type topological structure, have transmitted in both directionsCharacteristic, transmission speed are that 1Mbps transmission modes are half-duplex mode, and coding transmission is carried out using Manchester code.
1553B buses need during being communicated in some Special field environment and laboratory environment of todayCarry out bus waveform monitoring, when to prevent 1553B bus communication mistakes occur, the waveform acquisition 1553B buses and guarantor in timeIt leaves and, to analyze 1553B bus transfer guilty culprits, to be accurately positioned, shorten the troubleshooting time.
After 1553B communication failures, generally oscillograph is used to carry out waveform acquisition, but oscillograph needs direct surveillance,In the case of 1553B bus communication failure occurrence probability very littles, when expending very much people, and oscillograph can only retain and work as prewaveShape is unfavorable for fault location.
Invention content
The technical problem to be solved in the present invention is to provide a kind of comparison of 1553B buses acquisition structure and comparison acquisition sidesMethod.
The present invention is adopted the technical scheme that solve technical problem present in known technology:
The comparison of the 1553B buses of the present invention acquires structure, including：1553B communicates sending device, 1553B communications receiveDevice, analog acquisition device, central processor CPU, SRAM memory and display；Wherein 1553B communicate sending device with1553B communicates data connection between reception device, and 1553B communication sending devices are connected with analog acquisition device again, analog quantitySampler is connected to central processor CPU, and 1553B communications reception device is connected with central processor CPU, central processing unitCPU is connected with SRAM memory and display simultaneously.
The present invention can also use following technical measures：
The chip model of the analog acquisition device is AD7610.
The model TMS320CC6713 of the chip of the central processor CPU.
The model MT48LC32M16 of the SRAM memory.
The comparison acquisition method of the 1553B buses of the present invention, 1553B communicate sending device and are communicating reception dress with 1553BIt sets while communicated, the same communication data that will send out is transmitted to analog acquisition device, then by analog quantity acquiring deviceBy treated, data are sent to central processor CPU to part, and 1553B communicates reception device and transmits reception to central processor CPUThe data arrived, central processor CPU is by the data that analog acquisition device and 1553B communications reception device are sent while being stored inSRAM memory, and the data that analog acquisition device and 1553B communications reception device are sent are compared, then aobviousShow that the communication data on device to 1553B buses carries out wave simulation.
The invention has the advantages and positive effects that:
The comparison acquisition structure and comparison acquisition method of the 1553B buses of the present invention, normal communication is carried out in 1553B busesWhen, connection when 1553B buses are sent is connected to analog acquisition device simultaneously, and analog acquisition device is receivedThe transmission data of 1553B buses remains, while the data that 1553B is received are retained, then two kinds of data intoRow comparison, is just easy to the state of the communication signal of 1553B buses, and the waveform that 1553B buses are collected, inCentral processor CPU draws, and is shown over the display, so that designer more intuitively monitors 1553B busesTransmission data.It is mainly used in needing the communication waveform and 1533B bus communication failures of moment monitoring 1553B buses, needsThe occasion quickly positioned has the characteristics that efficient, implementation is simple and acquisition is accurate, is suitable for Special field and laboratory ringIt is monitored at the time of 1553B buses in border, especially those 1553B bus communications failure needs the equipment monitored.
Description of the drawings
Fig. 1 is the schematic diagram of the comparison acquisition structure of the 1553B buses of the present invention.
Specific implementation mode
Referring to the drawings and embodiment the present invention will be described in detail.
Fig. 1 is the schematic diagram of the comparison acquisition structure of the 1553B buses of the present invention.
The comparison of the 1553B buses of the present invention acquires structure, including：1553B communicates sending device, 1553B communications receiveDevice, analog acquisition device, central processor CPU, SRAM memory and display；1553B communicate sending device be used forThe outer communication data for sending 1553B interfaces, communication sending device externally draws connection, wherein connection is adopted with analog quantity all the wayCollection device be connected, communication signal is acquired in real time by analog acquisition device, wherein 1553B communicate sending device and1553B communicates data connection between reception device, and 1553B communication sending devices are connected with analog acquisition device again, analog quantitySampler is connected to central processor CPU, and 1553B communications reception device is connected with central processor CPU, and 1553B is receivedDevice is received passes data back central processor CPU, central processing after the communication data that sending device transmits in the form of receiptDevice CPU is connected with SRAM memory and display simultaneously.
The chip model of analog acquisition device is the AD7610 of ADI companies production.
The TMS320CC6713 chips of the model TI companies production of the chip of central processor CPU.
The MT48LC32M16 of the model magnesium light company production of SRAM memory.
The comparison acquisition method of the 1553B buses of the present invention, 1553B communicate sending device and are communicating reception dress with 1553BIt sets while communicated, the same communication data that will send out is transmitted to analog acquisition device, then by analog quantity acquiring deviceBy treated, data are sent to central processor CPU to part, and 1553B communicates reception device and transmits reception to central processor CPUThe data arrived, central processor CPU is by the data that analog acquisition device and 1553B communications reception device are sent while being stored inSRAM memory, and the data that analog acquisition device and 1553B communications reception device are sent are compared, then aobviousShow that the communication data on device to 1553B buses carries out wave simulation.
When 1553B buses carry out normal communication, connection when 1553B buses are sent is connected to analog quantity simultaneously and adoptsCollect device, the transmission data for the 1553B buses that analog acquisition device receives is remained, while 1553B is receivedData retained, then two kinds of data are compared, are just easy to the state of the communication signal of 1553B buses, andThe waveform that 1553B buses are collected, is drawn by central processor CPU, is shown over the display
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, thoughThe right present invention has been described by way of example and in terms of the preferred embodiments, however, it is not limited to the present invention, any technology people for being familiar with this professionMember can utilize the technology contents disclosed to make a little change or modification certainly without departing from the scope of the present invention, atFor the equivalent embodiment of equivalent variations, as long as being the content without departing from technical solution of the present invention, according to the technical essence of the inventionTo any simple modification, equivalent change and modification made by above example, belong in the range of technical solution of the present invention.