CN109581415A - A kind of synchronous apparatus and method calculated and time service controls based on GNSS - Google Patents
A kind of synchronous apparatus and method calculated and time service controls based on GNSS Download PDFInfo
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- CN109581415A CN109581415A CN201910075357.9A CN201910075357A CN109581415A CN 109581415 A CN109581415 A CN 109581415A CN 201910075357 A CN201910075357 A CN 201910075357A CN 109581415 A CN109581415 A CN 109581415A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
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Abstract
The invention discloses a kind of synchronous apparatus and method for calculating timing generation, triggering and time service control in distributed emulation based on GNSS.The control device includes microprocessor module, GNSS module, cascade module, synchronization signal selecting module, synchronization signal output module, external synchronization signal conditioning module, operating mode configuration module, network communication module, programming module and the power module of electrical connection.The synchronous calculating and time service control method, control device dependent on invention, each simulation node computer to be connected by COM provides homologous, the high-precision timing trigger signal of one kind, serial ports precision time service and network multicast time service control, come drive each simulation node it is synchronous calculate and the check and correction of system time consistency, support the synchronous of large-scale distributed analogue system under the conditions of the networking of strange land to calculate and when school controls.
Description
Technical field
The invention belongs to distributed simulation technology fields, in particular to one kind for hardware based same in distributed emulation
Step calculate timing generate, the apparatus and method of triggering and time service control, be particularly suitable for large-scale distributed imitative under the conditions of networking
The synchronous of true system calculates and time service control.
Background technique
For large-scale distributed analogue system, timing synchronization and time management are the key that realize correct emulation logic and difficulty
Point, especially for the fly simulation training real-time emulation system under the conditions of networking, it is necessary to assure when each simulation node calculates
The synchronism of sequence and the consistency of time are just able to achieve the correct interaction of each simulation model and simultaneously advance, avoid such as big machine
The problems such as scenery picture or target display are shaken under dynamic flying condition.
Currently, there are mainly three types of solutions: first is that software synchronization side in order to solve simultaneously advancing for each simulation node
Method, full utilization software completes the synchronization of each clock in distributing emulation system, but the workload that this software synchronizes is very
Greatly, the synchronism deviation and between node is easy accumulation, it is often more important that, propagation delay time is big late on a wide area network for synchronizing information, and has
Very big uncertainty, this can make the effect of software synchronization undesirable, and CN 103763377B is exactly a kind of based on the soft of Ethernet
Synchronous method；Second is that hardware synchronization method, hardware synchronization is often by means of Global Navigation Satellite System (Global
Navigation Satellite System, GNSS) Lai Shixian, generally according to real-time constraint condition selection Ethernet or instead
It penetrates memory network and carrys out transmission timing signal, synchronizing based on Ethernet equally exists the uncertainty of time delay, and is based on reflective memory
Then there is the higher disadvantage of hardware cost in net；Third is that the synchronous method of layer-stepping mixing, using the synchronous work together of hardware and software
Make to select some node as time management host, and on time management host to realize that the clock between node is synchronous
A GNSS receiver is introduced, the time management host in Different LANs can be realized same by the time signal of GNSS
Step, inside each local area network, each node passes through the time management host synchronization in software realization and the local area network.CN
102201907B is exactly to send synchronizing information to each simulation node by being not introduced into the heartbeat server of GNSS receiver, existing
Major defect is that the delay of synchronizing information is uncertain, is not suitable for the synchronous control of large-scale distributed analogue system under the conditions of networking
System.CN 1749916A is then that the precise time alignment based on GPS second pulse signal is realized by two com ports of computer,
Not for the synchronous generation for calculating clock signal of multiple stage computers.
Each simulation node computer usually all has 9 needle COMs (meeting EIA-RS-232C standard), this is serial
PORT COM data carrier detection (Data Carrier Detect, DCD), data ready for sending (Data Send Ready,
DSR), clear to send (Clear To Send, CTS) and ring instruction (Ring Indicator, RI) pin can acquire outside
Input control signal, receive data (Received Data, RXD) pin can receive serial communication data, thus emulating
Cause corresponding serial ports interrupt event on node computer and data receiver can be carried out, this needs to operate in simulation node calculating
Software on machine is correctly arranged.
It is the COM by each simulation node computer the invention belongs to the hardware synchronization method based on GNSS
Homologous, high-precision timing trigger signal is introduced, to drive the synchronous of each simulation node to calculate, overcomes and is carried out by Ethernet
Synchronous delay-non-determinism, and do not need each simulation node computer and special synchronization hardware board is installed, support strange land
Large-scale distributed analogue system controls when synchronizing calculating and school under the conditions of networking.
Summary of the invention
The object of the present invention is to provide a kind of synchronous calculating and time service control in distributing emulation system based on GNSS
The apparatus and method of system introduce timing trigger signal by the COM of simulation node computer, and pass through Ethernet
The mode of UDP multicast carries out time service, meets the synchronous of each node computer periodicity simulation calculation in distributing emulation system and drives
Dynamic and system time check and correction.
To achieve the above object, the invention adopts the following technical scheme:
One of present invention is calculated and time service control device based on the synchronous of GNSS, which is characterized in that the control dress
Set microprocessor module (M1), GNSS module (M2), cascade module (M3), synchronization signal selecting module including electrical connection
(M4), synchronization signal output module (M5), external synchronization signal conditioning module (M6), operating mode configuration module (M7), network are logical
Believe module (M8), programming module (M9) and power module (M10).
Module M1, the microprocessor module are produced from synchronization signal (X3) according to the synchronization source signal of input, realize control
The synchronization signal of device processed exports switching control, and network control data realizes the synchronization signal of control device output based on the received
Set of frequency, the setting of time service data time interval and GNSS module (M2) working state control.
The synchronization source signal of microprocessor module (M1) input includes the satellite synchronization letter of GNSS module (M2) output
What the slave synchronization signal (X2) and external synchronization signal conditioning module (M6) of number (X1), cascade module (M3) output exported outer synchronous believes
Number (X4).
The synchronization signal output switching control of the microprocessor module (M1) is the synchronization source signal according to measurement input
Frequency values come realize satellite synchronous signal (X1) and motor synchronizing signal (X3) output switching control, from synchronization signal (X2) and from
The switching control of the switching control of synchronization signal (X3) output and external synchronization signal (X4) and motor synchronizing signal (X3) output.It cuts
Control is changed as when satellite synchronous signal (X1) is not detected, from synchronization signal (X2) or external synchronization signal in microprocessor module (M1)
(X4) when, output motor synchronizing signal (X3) can be switched to, when detect satellite synchronous signal (X1) again, from synchronization signal (X2) or
In the presence of external synchronization signal (X4), output satellite synchronization signal (X1) can be switched to again, from same from output motor synchronizing signal (X3)
Walk signal (X2) or external synchronization signal (X4).It is described whether to be able to detect that synchronous source signal, it is the synchronization according to measurement input
The frequency values of source signal determine, when the frequency values that continuous 3 times measure are equal to 0, then for synchronous source signal is not detected,
When the frequency values that continuous 3 times measure are equal and when being all larger than 0, then to detect synchronous source signal.
The synchronous signal frequency setting of the microprocessor module (M1) includes the satellite synchronization of GNSS module (M2) output
The frequency for the motor synchronizing signal (X3) that the set of frequency and microprocessor module (M1) of signal (X1) are exported by timer internal
Setting.
The time service data time interval setting of the microprocessor module (M1) includes RS-232C serial ports time service data (D1)
The time interval setting of output, the time cycle setting of RS-232C second pulse signal (X9) output and UDP multicast export time service number
It is arranged according to the time interval of (D3).
The motor synchronizing signal (X3) of microprocessor module (M1) output is microprocessor module (M1) timer internal
The adjustable timing signal of the frequency of generation.Microprocessor module (M1) measures current synchronization source signal (X1 or X2 or X4) frequency
And adjust the internal consistent motor synchronizing signal (X3) of timer output frequency, when be not detected synchronous source signal (X1 or X2 or
When X4), then the frequency values of motor synchronizing signal (X3) are set by received network control data.
Include timer, memory and several communication ports inside microprocessor module (M1), receives the same of input
Step signal, configuration status, time service data and network control data, output motor synchronizing signal (X3), selection and gate control signal,
Time service data and GNSS module (M2) working state control data.Several communication ports of microprocessor module (M1) are distinguished
By serial ports A connection programming module for debugging and downloading programming data, storage is realized by the memory inside serial ports B connection
Data transmission, the transmitting-receiving of time service data is realized by serial ports C connection cascade module (M3), passes through serial ports D connection GNSS module
(M2) transmitting-receiving of satellite time transfer data and GNSS module (M2) working state control data is realized.
Microprocessor module (M1) realizes two kinds of control device Master and Slave work according to operating mode configuration status
The selection of mode.Microprocessor module (M1) is received by serial ports D from GNSS module (M2) under Master operating mode
The satellite time transfer data of output are received by serial ports C and are awarded from what cascade module (M3) was exported under Slave operating mode
When data.Microprocessor module (M1) exports time service data by serial ports C and gives cascade module (M3) under Master operating mode
It is defeated to synchronization signal that time service data are only exported by serial ports C under Slave operating mode with synchronization signal output module (M5)
Module (M5) out.
Satellite time transfer data and GNSS module are realized in module M2, the GNSS module, connection microprocessor module (M1)
(M2) transmitting-receiving of working state control data, output satellite synchronization signal (X1) to microprocessor module (M1) and synchronization signal choosing
It selects module (M4), output second pulse signal (X5) to cascade module (M3) and synchronization signal output module (M5).GNSS module
(M2) signal that navigation satellite is received by antenna is defended by the serial ports D realization of UART interface connection microprocessor module (M1)
The transmitting-receiving of star time service data and GNSS module (M2) working state control data.
GNSS module (M2) working state control data then include synchronous GNSS system selection, time mode setting, antenna
It is arranged with user's delay time.Selectable synchronous GNSS system includes GPS, GLONASS, Galileo and Beidou, time mode
Setting includes Disabled, Survey In and Fixed Mode.
Module M3, the cascade module, connection microprocessor module (M1) realize the transmitting-receiving of time service data, pass through 2 grades
Connecting port (P1) realizes the transmitting-receiving of RS-485 cascade signal (X11).Cascade module (M3) connects the string of microprocessor module (M1)
Mouth C realizes the transmitting-receiving of time service data.
2 subtending ports (P1) of the cascade module (M3) are used for 2 road RS- under control device Master operating mode
The output of 485 cascade signals (X11), for 1 road RS-485 cascade signal (X11) under control device Slave operating mode
The output of input and 1 road RS-485 cascade signal (X11).
Module M4, the synchronization signal selecting module receive the selection control of microprocessor module (M1), by defending for input
Star synchronization signal (X1), from four kinds of synchronization signal (X2), motor synchronizing signal (X3) and external synchronization signal (X4) synchronous sequence signals
One of as choose synchronization signal (X6) export.Synchronization signal selecting module (M4) by data selector realize four kinds it is synchronous when
The selection of sequential signal controls.
Synchronization signal (X6), second pulse signal (X5) and micro- place are chosen in module M5, the synchronization signal output module, reception
The time service data (D2) of device module (M1) output are managed, and are converted to synchronization signal (X8), the second pulse signal of RS-232C level
(X9) and serial ports time service data (D1) are output to RS-232C synchronous sequence delivery outlet (P2), while will choose synchronization signal (X6)
TTL synchronization signal delivery outlet (P3) is output to as TTL synchronization signal (X7) after driver.Synchronization signal output module
(M5) received to choose synchronization signal (X6) from synchronization signal selecting module (M4), received second pulse signal (X5) comes from
GNSS module (M2), received time service data (D2) come from the output of microprocessor module (M1) serial ports C.Synchronization signal exports mould
Input can be chosen synchronization signal (X6), second pulse signal if internal have main line RS-232C level shifting circuit by block (M5)
(X5) and time service data (D2) are if be converted to the synchronization signal (X8) of main line RS-232C level, second pulse signal (X9) and serial ports
Time service data (D1), and several RS-232C synchronous sequence delivery outlets (P2) are output to, each RS-232C synchronous sequence output
Mouth contains the synchronization signal (X8), second pulse signal (X9) and serial ports time service data (D1) of RS-232C level simultaneously.Together
When, synchronization signal output module (M5) chooses synchronization signal (X6) after high-speed driver as the synchronous letter of TTL for input
Number (X7) is output to TTL synchronization signal delivery outlet (P3).
Module M6, the external synchronization signal conditioning module receive the gating control of microprocessor module (M1), by input
External synchronization signal (X10) exports after signal condition to microprocessor module (M1) and synchronization signal selecting module (M4).It is outer same
The external synchronization signal (X10) for walking signal conditioning module (M6) input is pulse trigger type or edge trigger, the signal tune of process
Reason includes clipping, shaping etc..
Module M7, the operating mode configuration module are connected to microprocessor module (M1), pass through microprocessor module
(M1) acquisition configuration state, setting control device are in Master or Slave operating mode.Operating mode configuration module (M7)
Configuration status has low level and high level two states, is set by short-circuit block, when matching for microprocessor module (M1) acquisition
Set state be low level when, control device be in Master operating mode, when microprocessor module (M1) acquire configuration status
When for high level, control device is in Slave operating mode.
Module M8, the network communication module are connected to microprocessor module (M1), receive net by network interface (P4)
Network controls data, and exports UDP multicast time service data (D3).Received network control data is mainly set including synchronous signal frequency
Definite value, time service data time interval setting value and GNSS module (M2) working state control data etc..
Module M9, the programming module connect the serial ports A of microprocessor module (M1), programming data are downloaded to described
Control device.
Module M10, the power module are provided directly after being converted to 3.3V for entire control device by input 5V power supply
Stream power supply.
A kind of distributed simulation synchronization proposed in the present invention calculates and the method for time service control, which is characterized in that including
Following steps:
Step S1 constructs several above-mentioned synchronous based on GNSS and calculates and time service control device, and configures wherein one
A control device is in Master operating mode and as master controller, configures other control devices and is in Slave operating mode
And as from controller, master controller connects satellite signal receiving antenna；
Master controller described in step S1 is connected by step S2 with the cascade port (P1) from controller, is based on RS-485
Logic level realizes synchronization signal, second pulse signal and time service data by master controller to the transmission from controller；
Step S3, by master controller described in step S1 and from multiple RS-232C synchronous sequence delivery outlets of controller
(P2) it is connect respectively with the COM of multiple simulation node computers in distributing emulation system, which is characterized in that
The synchronous letter of RS-232C for being connected to control device output by CTS or DSR or the DCD signal pins of the COM
Number (X8) is connected to the RS- of control device output by the RI or DCD or DSR or cts signal pin of the COM
232C second pulse signal (X9) is connected to the RS- of control device output by the RXD signal pins of the COM
232C serial ports time service data (D1) signal；Synchronization signal (X8) and second pulse signal (X9) cannot be connected to same serial logical simultaneously
Interrogate the identical pin in port；
Master controller described in step S1 and the network interface (P4) from controller are connected to point by cable by step S4 respectively
The interchanger of local area network where cloth analogue system realizes network cycle time service of the master controller based on UDP multicast mode, real
Existing master controller and the telecommunication network configuration management from controller；
Step S5, by the synchronous letter outside external synchronization signal (X10) the input terminal connection of master controller described in step S1
Number source is realized that the lower distributed emulation of outside source triggering calculates and is driven；
Master controller described in step S1 and the TTL synchronization signal delivery outlet (P3) from controller are connected to by step S6
The external synchronization signal source input interface of the synchronization subcard of professional video card realizes the display refresh synchronization of professional video card to simulation calculation
Period；
Step S7, the COM of simulation node computer described in step S3 are correctly arranged, so that imitative
True node computer receives synchronization signal, second pulse signal and serial ports time service data, and the setting of COM includes number
It is serial according to receiving Configuration of baud rate and enabled RS-232C synchronization signal (X8) with RS-232C second pulse signal (X9) and being connect
The corresponding interrupt event of PORT COM leg signal.
The synchronous calculating and time service control method, the synchronizing based on GNSS dependent on invention calculates and time service controls
Device, each simulation node computer to be connected by COM provide a kind of homologous, high-precision synchronous sequence
Trigger signal and the method for receiving the consistency time, while supporting time calibration in network and single serial ports precision time service, and have and be based on
The synchronizing capacity of timing trigger signal under the conditions of the strange land networking of GNSS, at the same the device and method have satellite synchronization, from
The generating mode of four kinds of synchronous sequence trigger signals of synchronous, outer synchronization and Timing Synchronization, and can be by master controller and from control
The synchronization of more simulation node computers is realized in the cascade of device processed, also there is the synchronization subcard for synchronizing professional video card to refresh week
Phase, the synchronization signal exported by the synchronization subcard that external synchronization signal input terminal receives professional video card letter synchronous with VGA frame is received
The function of number equal external pulses trigger signal source.
The beneficial effects of the invention are as follows propose it is a kind of calculated for synchronous based on GNSS in distributing emulation system and
Time service control device and method, this method are different from through Ethernet or Reflective memory network come transmission timing signal, using emulation
The COM of computer synchronizes signal triggering, avoids the uncertainty of ethernet signal transmission delay, simultaneously
Do not need to increase the hardware boards such as reflective memory card or pci card on simulation computer, have synchronization accuracy is high, build conveniently,
The advantages of economically feasible.
Detailed description of the invention
Fig. 1 is the synchronous structural schematic diagram calculated with time service control device in the present invention based on GNSS；
Fig. 2 is the interface circuit figure of microprocessor module in the present invention；
Fig. 3 is the circuit diagram of GNSS module in the present invention；
Fig. 4 is the cascade circuit figure that synchronization signal is chosen in the present invention；
Fig. 5 is the circuit diagram of synchronization signal selecting module in the present invention；
Fig. 6 is the circuit diagram that synchronization signal and time service data export all the way in the present invention；
Fig. 7 is the circuit diagram of external synchronization signal conditioning module in the present invention；
Fig. 8 is master controller and the cascade connection schematic diagram from controller in the present invention；
Fig. 9 is the connection schematic diagram of master controller in the present invention；
Figure 10 is the connection schematic diagram in the present invention from controller.
Specific embodiment
The present invention is described in more detail with embodiment with reference to the accompanying drawing.
Fig. 1 is the synchronous structural schematic diagram calculated with time service control device in the present invention based on GNSS, including micro process
Device module (M1), GNSS module (M2), cascade module (M3), synchronization signal selecting module (M4), synchronization signal output module
(M5), external synchronization signal conditioning module (M6), operating mode configuration module (M7), network communication module (M8), programming module
(M9) and 10 main functional modules such as power module (M10).
Module M1, the microprocessor module, can be used RCM57XX, RCM67XX and other series microprocessor modules are real
Existing, Fig. 2 is the interface circuit figure using RCM6700 microprocessor module.Utilize serial ports A (TXA and the RXA of microprocessor module
Signal wire) downloading of realizing programming data, it is realized using serial ports B and is transmitted with the program data of internal flash, utilize serial ports C
(TXC_Time and RXC_Time signal wire) realizes the time service data transmit-receive and synchronization signal output module of cascade module (M3)
(M5) time service data are sent, and realize satellite time transfer data and GNSS using serial ports D (TXD_GNSS and RXD_GNSS signal wire)
The transmitting-receiving of module (M2) working state control data；Satellite synchronous signal TP1Out (X1) conduct that GNSS module (M2) is exported
The external interrupt signal of microprocessor module (M1) is inputted and measures its frequency；By cascade module (M3) output from synchronization
Signal RX_485 (X2) passes through its frequency of the input capture functional measurement of microprocessor module (M1)；External synchronization signal is improved into mould
The external synchronization signal ExtSynSigIN (X4) of block (M6) output by the input capture functional measurement of microprocessor module (M1) its
Frequency；The GetMasterOrSlave signal that microprocessor module (M1) is exported by collecting work pattern configurations module (M7)
Low and high level state, for judging that control device operating mode is in Master state or Slave state；Microprocessor mould
Block (M1) measure current synchronization source signal (X1 or X2 or X4) frequency and adjust internal timer output frequency it is consistent from
Synchronization signal TimerC0 (X3), and synchronization signal output is realized according to the detecting state of synchronous source signal (X1 or X2 or X4)
Auto-changeover control；Microprocessor module (M1) judges that GNSS module whether there is by the state of acquisition GNSS_ADD signal,
When there are GNSS module, the output of satellite synchronous signal may be implemented；TX+, TX-, RX+ of microprocessor module (M1) interface
Outputting and inputting for network data is realized with RX-；The RE_485 and DE_485 of microprocessor module (M1) interface realize grade gang mould
The cascade signal of block (M3) receives and dispatches control；SigSel_En1, SigSel_En2, SigSel_ of microprocessor module (M1) interface
S0 and SigSel_S1 realizes the output signal selection control of synchronization signal selecting module (M4)；Microprocessor module (M1) interface
DFF_Set realize external synchronization signal conditioning module (M6) gating control.
Module M2, the GNSS module realize that Fig. 3 is the electricity of LEA-M8T module using LEA-M8T accurate time transmission module
Road design drawing.The aerial signal that navigation satellite is received by RF_IN, passes through UART interface TXD_GNSS and RXD_GNSS signal wire
Serial ports D, the output satellite synchronization signal TP1Out (X1) of microprocessor module (M1) are connected, second pulse signal TP2Out is exported
(X5), the usb communication for while by USB_DM and USB_DP realizing LEA-M8T module, passes through VCC_RF, V_ANT and ANT_
The open circuit and short-circuit detecting of DET_N realization antenna.
Module M3, the cascade module are realized using three RS-485 communication chip MAX3073.Fig. 4 is to choose synchronous letter
The cascade module circuit diagram of number Sig1Out (X6) chooses synchronization signal Sig1Out under control device Master operating mode
(X6) RS-485 logic level is converted to by MAX3073 chip, is output to 2 by TOutZ_485 and TOutY_485 signal wire
A subtending port (P1).Under control device Slave operating mode, pass through the RInA_485 and RInB_485 of 1 road subtending port
Signal wire receives the RS-485 logic level of input from synchronization signal, exports after the conversion of MAX3073 chip from synchronization signal
RX_485 (X2) arrives microprocessor module (M1).Second pulse signal and time service data can be using two other MAX3073 cores
Piece realizes cascade output and input with same principle.
Module M4, the synchronization signal selecting module realize that Fig. 5 is using double four-way track datas selection chip 74HC153
The circuit diagram of synchronization signal selecting module.The satellite synchronous signal TP1Out of chip 74HC153 selection input is selected by data
(X1), from synchronization signal RX_485 (X2), motor synchronizing signal TimerC0 (X3) and external synchronization signal ExtSynSigIN (X4) four
One of kind synchronous sequence signal, which is used as, chooses synchronization signal Sig1Out (X6) to export, meanwhile, also output another way chooses synchronous letter
Number Sig2Out is to increase driving capability.
Module M5, the synchronization signal output module, using multiple RS-232C electrical level transferring chip MAX3232E realize,
Each chip realizes the conversion output of two-way RS-232C level signal, and Fig. 6 is the electricity of synchronization signal and the output of time service data all the way
Lu Tu.Synchronization signal Sig1Out (X6) and time service data TXC_Time (D2) are chosen in circuit diagram reception, by MAX3232E core
The synchronization signal OutSynSig (X8) and serial ports time service data TXC_232 (D1) that piece is converted to RS-232C level are output to synchronous
Sequential export mouth (P2), when second pulse signal TP2Out (X5) is output to synchronous after then converting by another MAX3232E chip
Sequence delivery outlet (P2).Meanwhile synchronization signal Sig1Out (X6) conduct after high-speed driver NC7SZ125 chip will be chosen
TTL synchronization signal (X7) is output to TTL synchronization signal delivery outlet (P3).
Module M6, the external synchronization signal conditioning module are realized, Fig. 7 using amplitude limiter circuit and d type flip flop 74HC74 chip
For the circuit diagram of external synchronization signal conditioning module.It, will by improving the external synchronization signal ExtSynSig (X10) of input
External synchronization signal ExtSynSigIN (X4) after conditioning gives microprocessor module (M1) and synchronization signal selecting module (M4).
The low and high level of configuration status signal is arranged by short-circuit block for module M7, the operating mode configuration module.
Module M8, the network communication module pass through Ethernet interface (P4), network isolation transformer and signal filter circuit
It is connected with TX+, TX-, RX+ and RX- of microprocessor module (M1) interface, realizes outputting and inputting for network data.
Module M9, the programming module, using FT232RL chip realize microprocessor module (M1) serial ports A (TXA and
RXA signal wire) and status signal (STATUS and SMODE signal wire) and host computer usb communication and state instruction, realize programming
Data downloading and operation debugging.
5V power supply is converted to 3.3V direct current using AMS1117 power conversion chip by module M10, the power module.
Calculating and time service controlling party are synchronized with time service control device, proposition using synchronous calculate based on GNSS of invention
The connection schematic diagram of method specific implementation as shown in Fig. 8, Fig. 9 and Figure 10, Fig. 8 be synchronous in Master operating mode calculate and
Time service control device (referred to as master controller) it is synchronous with what it is in Slave operating mode calculating and time service control device (referred to as from
Controller) cascade connection schematic diagram, Fig. 9 is the connection schematic diagram of master controller, and Figure 10 is from the connection schematic diagram of controller.
Step S1 constructs several above-mentioned synchronous calculating and time service control device based on GNSS, and passes through Working mould
The one of control device of short-circuit block setting of formula configuration module is in Master operating mode and as master controller, passes through work
The other control devices of short-circuit block setting of operation mode configuration module are in Slave operating mode and as from controllers, connect simultaneously
Satellite signal receiving antenna is connect to antenna input port.
2 cascaded-output mouths of master controller described in step S1 are connected by step S2 with the cascade input port from controller
It connects, a master controller can connect two cascade input ports from controller, and cascade connection schematic diagram is as shown in figure 8, cascade
Mouth uses the form of RJ45 interface.
Step S3, by master controller described in step S1 and multiple synchronism output mouths from controller respectively with distributed emulation
The COM of several simulation node computers in system connects, the cts signal pin connection of COM
The synchronization signal (X8) of control device output, the pulse per second (PPS) letter of the RI signal pins connection control device output of COM
Number (X9), time service data (D1) signal of the RXD signal pins connection control device output of COM.Synchronism output mouth
The same form for using RJ45 interface.
Master controller described in step S1 and the network interface from controller are passed through cable respectively and are connected to distributed imitate by step S4
The network switch of local area network, realizes network cycle time service of the master controller based on UDP multicast mode, simultaneously where true system
Master controller and telecommunication network configuration management from controller.
Step S5, by the source of synchronising signal outside the external synchronization signal input terminal connection of master controller described in step S1, outside
The source of synchronising signal in portion can be the frame synchronization in the synchronization signal or VGA vision signal of the synchronization subcard output of professional video card
Signal drives to realize and calculate with the consistent distributed emulation of display refresh rates.
It is aobvious to be connected to profession by step S6 for master controller described in step S1 and the TTL synchronization signal delivery outlet from controller
The synchronization subcard bnc interface of card realizes the display refresh synchronization of professional video card to simulation calculation as external synchronization signal input source
Period.Using the TTL synchronization signal delivery outlet of DB9 form, a TTL synchronization signal delivery outlet can connect the multiple synchronizations of driving
Subcard.
Step S7, the COM of simulation node computer described in step S3 are correctly arranged, so that imitative
True node computer receives synchronization signal, second pulse signal and serial ports time service data, the number including COM is arranged
According to receive baud rate be 115200 bit/second, 8 data bit, 1 stop position, no parity, without flow control, and enabled synchronous letter
The interrupt event EV_CTS and EV_RING of RI leg signal that the CTS pin of number connection connect with second pulse signal, in this way emulation
Node computer can receive synchronous calculating trigger signal, second pulse signal and time service data.
It is calculated the innovation of the invention consists in that connecting each simulation node in distributed emulation by COM
Machine provides device and the side of a kind of homologous, the high-precision synchronous sequence trigger signal generation based on GNSS and time service control
Method has the synchronizing capacity of timing trigger signal and the cascade ability of master-slave controller under the conditions of the strange land networking based on GNSS.
Show that the device and method can provide precision≤600ns synchronous triggering signal for each simulation node computer by test.
Above the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, but the not limit of the scope of the present invention
System, those skilled in the art are not required to make the creative labor the various modifications or changes that can be made, cover to the present invention
Within protection scope of the present invention.
Claims (10)
1. a kind of synchronous calculating and time service control device based on GNSS, it is characterised in that: the microprocessor mould including electrical connection
It is block (M1), GNSS module (M2), cascade module (M3), synchronization signal selecting module (M4), synchronization signal output module (M5), outer
Synchronization signal conditioning module (M6), operating mode configuration module (M7), network communication module (M8), programming module (M9) and power supply
Module (M10)；
The microprocessor module (M1), is produced from synchronization signal (X3) according to the synchronization source signal of input, realizes control device
Synchronization signal export switching control, based on the received network control data realize control device output synchronous signal frequency set
It sets, time service data time interval is arranged and GNSS module (M2) working state control；
Satellite time transfer data and GNSS module (M2) work shape are realized in the GNSS module (M2), connection microprocessor module (M1)
State controls the transmitting-receiving of data, output satellite synchronization signal (X1) to microprocessor module (M1) and synchronization signal selecting module
(M4), second pulse signal (X5) is exported to cascade module (M3) and synchronization signal output module (M5)；
The cascade module (M3), connection microprocessor module (M1) realize the transmitting-receiving of time service data, pass through 2 subtending ports
(P1) transmitting-receiving of RS-485 cascade signal (X11) is realized；
The synchronization signal selecting module (M4) receives the selection control of microprocessor module (M1), by the satellite synchronization of input
Signal (X1) is made from one of synchronization signal (X2), motor synchronizing signal (X3) and external synchronization signal (X4) four kinds of synchronous sequence signals
To choose synchronization signal (X6) to export；
Synchronization signal (X6), second pulse signal (X5) and microprocessor mould are chosen in the synchronization signal output module (M5), reception
The time service data (D2) of block (M1) output, and be converted to the synchronization signal (X8), second pulse signal (X9) and string of RS-232C level
Data (D1) are output to RS-232C synchronous sequence delivery outlet (P2) when oral instruction, while synchronization signal (X6) will be chosen through overdriving
TTL synchronization signal delivery outlet (P3) is output to as TTL synchronization signal (X7) after device；
The external synchronization signal conditioning module (M6) receives the gating control of microprocessor module (M1), by the outer synchronization of input
Signal (X10) exports after signal condition to microprocessor module (M1) and synchronization signal selecting module (M4)；
The operating mode configuration module (M7), is connected to microprocessor module (M1), is acquired by microprocessor module (M1)
Configuration status, setting control device are in Master or Slave operating mode；
The network communication module (M8), is connected to microprocessor module (M1), receives network-control by network interface (P4)
Data, and export UDP multicast time service data (D3).
2. the synchronous calculating and time service control device according to claim 1 based on GNSS, it is characterised in that: micro- place
The synchronization source signal of reason device module (M1) input includes the satellite synchronous signal (X1) of GNSS module (M2) output, cascade module
(M3) external synchronization signal (X4) of slave synchronization signal (X2) and external synchronization signal conditioning module (M6) output exported.
3. the synchronous calculating and time service control device according to claim 1 based on GNSS, it is characterised in that: micro- place
The synchronization signal output switching control of reason device module (M1) is to realize satellite according to the synchronisation source signal frequency value of measurement input
The switching control of synchronization signal (X1) and motor synchronizing signal (X3) output is exported from synchronization signal (X2) and motor synchronizing signal (X3)
Switching control and external synchronization signal (X4) and motor synchronizing signal (X3) output switching control.
4. the synchronous calculating and time service control device according to claim 1 based on GNSS, it is characterised in that: micro- place
The synchronous signal frequency setting of reason device module (M1) includes that the frequency of the satellite synchronous signal (X1) of GNSS module (M2) output is set
Set the set of frequency of the motor synchronizing signal (X3) exported with microprocessor module (M1) by timer internal.
5. the synchronous calculating and time service control device according to claim 1 based on GNSS, it is characterised in that: micro- place
The time service data time interval setting of reason device module (M1) includes that the time interval of RS-232C serial ports time service data (D1) output is set
It sets, the time interval of the time cycle setting and UDP multicast output time service data (D3) of RS-232C second pulse signal (X9) output
Setting.
6. the synchronous calculating and time service control device according to claim 1 based on GNSS, it is characterised in that: micro- place
The motor synchronizing signal (X3) for managing device module (M1) output is that the frequency that microprocessor module (M1) timer internal generates is adjustable
Timing signal.
7. the synchronous calculating and time service control device according to claim 1 based on GNSS, it is characterised in that: the cascade
The cascade signal (X11) of module (M3) include be converted into RS-485 logic level choose synchronization signal (X6), second pulse signal
(X5) and microprocessor module (M1) transmitting-receiving time service data.
8. the synchronous calculating and time service control device according to claim 1 based on GNSS, it is characterised in that: the cascade
2 subtending ports (P1) of module (M3) are used for 2 road RS-485 cascade signals (X11) under control device Master operating mode
Output, for the input of 1 road RS-485 cascade signal (X11) and 1 road RS-485 grades under control device Slave operating mode
Join the output of signal (X11).
9. a kind of distributed simulation synchronization calculates and the method for time service control, which comprises the following steps:
Step S1 constructs several synchronous calculating and time service control device described in claim 1 based on GNSS, and configures it
In a control device be in Master operating mode and as master controller, configure other control devices and be in Slave work
Mode and as from controller, master controller connects satellite signal receiving antenna；
Master controller described in step S1 is connected by step S2 with the cascade port (P1) from controller, is based on RS-485 logic
Level realizes synchronization signal, second pulse signal and time service data by master controller to the transmission from controller；
Step S3, by master controller described in step S1 and multiple RS-232C synchronous sequence delivery outlets (P2) from controller point
It is not connect with the COM of multiple simulation node computers in distributing emulation system；
Master controller described in step S1 and the network interface (P4) from controller are connected to distribution by cable respectively by step S4
The interchanger of local area network where analogue system, realizes network cycle time service of the master controller based on UDP multicast mode, realizes master
Controller and telecommunication network configuration management from controller；
Step S5, by the source of synchronising signal outside the connection of external synchronization signal (X10) input terminal of master controller described in step S1,
Realize that the distributed emulation under outside source triggering calculates driving；
Master controller described in step S1 and the TTL synchronization signal delivery outlet (P3) from controller are connected to profession by step S6
The external synchronization signal source input interface of the synchronization subcard of video card realizes that the display refresh synchronization of professional video card is all to simulation calculation
Phase；
Step S7, the COM of simulation node computer described in step S3 are correctly arranged, so that emulation saves
Point computer receives synchronization signal, second pulse signal and serial ports time service data, and the setting of COM connects including data
The serial communication that receipts Configuration of baud rate and enabled RS-232C synchronization signal (X8) are connect with RS-232C second pulse signal (X9)
The corresponding interrupt event of port pinout signal.
10. distributed simulation synchronization according to claim 9 calculates and the method for time service control, it is characterised in that: described
The COM of the simulation node computer of step S3 is connected as drawing the CTS of COM or DSR or DCD signal
Foot is connected to the RS-232C synchronization signal (X8) of control device output, and the RI of COM or DCD or DSR or CTS is believed
Number pin is connected to the RS-232C second pulse signal (X9) of control device output, and the RXD signal pins of COM are connected
It is connected to RS-232C serial ports time service data (D1) signal of control device output.
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