CN106773985A - A kind of high accuracy sequence control unit and method for remote multiparty control - Google Patents
A kind of high accuracy sequence control unit and method for remote multiparty control Download PDFInfo
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- CN106773985A CN106773985A CN201611249026.5A CN201611249026A CN106773985A CN 106773985 A CN106773985 A CN 106773985A CN 201611249026 A CN201611249026 A CN 201611249026A CN 106773985 A CN106773985 A CN 106773985A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
Abstract
The present invention provides a kind of high accuracy sequence control unit and method for remote multiparty control, the invention is used as time reference by the rubidium atomic clock module acquisition temporal information synchronous with GPS standard time accuracy and pps pulse per second signal, and 100M Hz frequency signals are used as frequency reference.Zynq 7000 includes PS modules and PL modules, PS modules receive standard time information and control instruction triggered time by software, current time will be subtracted in triggered time, obtain count down information, calculate counting number, PL modules are sent to, PL modules realize Multi-serial port, timer, memory module and logic output function by logical design.PS modules start PL modules and start counting up, and after the completion of counting, PL modules output logic high drives the instruction of MAX4824 modules output control.The present invention can be widely used in those sequential control occasions higher to time precision requirement, and especially those (such as several hundred kilometers) apart from each other require the control occasion of high-precise synchronization again.
Description
Technical field
The invention belongs to remote multi-point sequent control field, and in particular to a kind of for the high-precision of remote multiparty control
Degree sequence control unit and method.
Background technology
Sequence control unit is the synchronous triggering control device in TT＆C system, be mainly used in control it is all kinds of participate in the experiment equipment by
Worked according to predetermined time sequencing, it is ensured that the accurate acquisition being normally carried out with test data of experiment, be in much testing
Class visual plant.
In sequential control field, sequence control unit is traditionally more to be realized using PLC (programmable logic controller (PLC)), PLC
Stable performance, reliability is high.But PLC is limited to the scanning method of operation of its software program, and the time precision of sequential instructions is not
Height, is typically not better than hundred microseconds.
For high accuracy sequential control, the calculating of time sequencing instruction is generally carried out using SCM＆FPGA logical device
And output.As article is entitled《Multichannel ns grades of SECO synchronous machine design based on NIOSII processors》It is described, use
The second generation FPGA embedded software core processor NIOS II devices of altera corp realize time sequencing synchronization, and precision is reachable
20ns (nanosecond), but its time range is no more than 100s.As article is entitled《A kind of design of multi-channel Time sequence control instrument with
Realize》Described, the time sequencing circuit control module being made up of single-chip microcomputer and FPGA realizes that precision reaches 2us (microsecond), time
The 20 tunnel time sequencing instructions of 0~10s of scope.At present apparently, the sequence control unit realized by the above method, time precision
Height, but existence time scope it is small the problems such as.
The content of the invention
The technical problems to be solved by the invention are to provide that a kind of time precision is high, time range is wide for remote many
The sequence control unit and method of point control, it is synchronous with GPS standard time accuracy to realize using the taming rubidium atomic clocks of GPS,
Zynq-7000 is sent into by the special clock I/O mouthfuls of pulse per second (PPS) for producing rubidium atomic clock module and 100M frequency signals.Can be real
Existing time precision reaches as high as 10ns, and time range may be up to the sequential control of 1 second~1000 hours.
Technical solution of the invention is：A kind of high accuracy sequential control list for remote multiparty control is provided
Unit, it is characterized in that：Including rubidium atomic clock module, PS modules, PL modules and command output module；
Above-mentioned PS modules communicate with one another with PL modules；The output end of above-mentioned PL modules connects with the input of command output module
Connect；
Above-mentioned rubidium atomic clock module is used to receive GPS standard time signal and pps pulse per second signal, and in GPS standard time letter
When number invalid, autonomous timing, generation is synchronized with local zone time, pulse per second (PPS) and the 100MHz frequencies of GPS standard time；
The local zone time that rubidium atomic clock module will be synchronized with the GPS standard time is sent to PS modules；Rubidium atomic clock module will
Pulse per second (PPS) and 100MHz frequencies are sent to PL modules；
Above-mentioned PS modules are also received when Ethernet or serial ports receive triggered time information/zero that main control computer sends to be believed
Breath；The PS modules subtract each other triggered time and currently received local zone time, obtain count down time；According to count down time
Count number simultaneously sets the instruction time sequentially, will count number and sends to PL modules；
The counting number that above-mentioned PL modules send on the basis of pulse per second (PPS) and 100MHz frequencies, with PS modules is counted,
Count and complete, produce logic output signal, and logic output signal is sent to command output module；
The logic output signal that above-mentioned command output module sends according to the PL modules for receiving, and real-time implementation sequential control
Instruction output.
Above-mentioned counting number includes that m and n, above-mentioned m are the whole second number of count down time, and above-mentioned n is count down time second
Following time and the multiple of 10ns.
Above-mentioned PL modules are counted m-1 times on the basis of pulse per second (PPS), and n+10 is counted on the basis of 100MHz frequencies8It is secondary.
Above-mentioned PS modules are the on-chip system with ARM dual core processors as core.
Above-mentioned PL modules are fpga logic device.
Above-mentioned command output module is MAX4824 modules.
Present invention also offers a kind of high accuracy sequence control method for remote multiparty control, including following step
Suddenly：
1) GPS standard time signal and pps pulse per second signal are used, is produced and is believed with the local zone time of GPS standard time high level of synchronization
Number, pulse per second (PPS), 100MHz frequencies steady clock high；
2) the triggered time information for receiving main control computer transmission by Ethernet or serial ports subtracts local zone time and obtains
Count number；
3) according to number, pulse per second (PPS), 100MHz frequencies is counted, start counting up, count and complete, export logic high, drive
Dynamic control instruction output.
Above-mentioned steps 2) with step 3) be specially：
2.1) system initialization, waits triggered time information to be received and is verified, if receiving triggered time information
Local zone time is then received, otherwise, return continues to triggered time information；
2.2) triggered time and current local time are subtracted each other, obtains count down time, then count number and set
Determine the instruction time sequentially, counting number includes that m and n, the m are the whole second number of count down time, and the n is count down time
Second following time and the multiple of 10ns；PS modules are sent to PL modules by number is counted；
2.3) counted m-1 times on the basis of pulse per second (PPS), n+10 is counted on the basis of 100MHz frequencies8It is secondary, and monitor counting
Whether state is correct, if an error is found, then starting subsequent cycle, the triggered time is received again；Logic high is otherwise exported,
Drive control instruction output.
The beneficial effects of the invention are as follows：
1st, the present invention realizes sequence control unit based on rubidium atomic clock and Zynq-7000, is connect by the software in PS modules
Receive standard time information and setting control time sequentially, output is instructed by PL parts (FPGA) logic realization, in time precision
It is upper reachable 10ns grades, significantly improve the time precision of sequence control unit.
2nd, the present invention tames rubidium atomic clock by GPS, there is provided time and second arteries and veins with GPS standard time source high-precise synchronization
Punching, therefore the output of its control instruction in time can be synchronous with GPS standard time accuracy.For those at a distance of tens or even
The dispersion occasion of hundreds of kilometer, due to the uniformity of GPS standard time, by each a set of proposed by the present invention suitable in multiple places
Sequence control unit, can realize the high-precise synchronization between the instruction of multiple spot time sequencing.
3rd, the sequence control unit that the present invention is realized, the method by being counted respectively to pulse per second (PPS) and 100MHz frequencies can
To set 1s to the time range more than 1000 hours, this is the large increase to time range.
4th, the present invention realizes sequential control function using Zynq-7000, can be extended and rise according to application demand
Level, realizes different sequential control modes, is applied to different occasions.
Brief description of the drawings
Fig. 1 is sequence control unit structure chart of the present invention；
Fig. 2 is PL module logics design RTL schematic diagram；
Fig. 3 is PS modular program flow charts；
Specific embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
The invention mainly relates to a kind of high accuracy sequence control unit and method for remote multiparty control, for reality
Now high accuracy sequential control function, can be widely applied to the remote multi-point sequent control occasion higher to time precision requirement.
Referring to Fig. 1, the sequence control unit of present invention design mainly includes four modules：Rubidium atomic clock module (U1), PS
Module (U2), PL modules (U3), command output module (U4).
Two output ends of rubidium atomic clock module respectively with PS modules (processing system), PL modules (FPGA) it is defeated
Enter end connection；PS modules and PL module communications；The output end of PL modules is connected with the input of command output module；
A kind of high accuracy sequence control unit for remote multiparty control and the realization of method is exemplified below, it is right
In PS modules and PL modules, what the present invention was realized by the development board Zedboard containing Zynq-7000 chips.
Gps antenna is responsible for receiving GPS standard time signal and pps pulse per second signal, and sends into rubidium atomic clock by bnc interface.
Rubidium atomic clock is responsible for producing high-precise synchronization in local zone time output, pulse per second (PPS) and the 100MHz rate-adaptive pacemakers of GPS standard time,
And when gps signal is invalid, autonomous timing keeps local zone time and GPS standard time synchronized, as sequence control unit when
Between benchmark.Wherein local time information is sent to PS modules (U2) by Ethernet or RS-232 serial ports, pulse per second (PPS) and
100MHz frequencies are by special I/O mouthfuls feeding PL modules (U3).
PL modules (U3) are responsible for by special clock I/O mouthfuls of reception rubidium atomic clock module with fpga logic device as core
The pulse per second (PPS) of feeding and 100MHz frequency signals, as time, frequency reference.IP kernel AXI UART are added in hardware logic to come
Serial port function is realized, I/O interface is mainly to be realized by PMOD interfaces on development board.FPGA portion designs timer, and will instruction
Output be initialized as low level, then timer is connected by AXI4 buses with ARM, can by ARM software design patterns countdowns,
Start and realize timer interruption.FPGA hardware logic counts driving instruction jointly by pulse per second (PPS) and 100MHz frequency signals
Output high level.The logical design RTL schematic diagram realized by FPGA is shown in Fig. 2.According to control function demand, realize embedded
The basic interface and sequential control function of kernel.PL modules are completed to count by logical device, and first pulse per second (PPS) is counted, to calculate
Time more than second, count (m-1) secondary i.e. Timing (m-1) second；Afterwards to 100MHz frequency countings, to calculate the essence of below second
The thin time, count (n+108) it is secondary can complete timing.Because 100MHz is when being produced with and by specialty by rubidium atomic clock module
Clock I/O interfaces are sent into, and its frequency accuracy and stability are high, and PL modules (U2) logic output accuracy passes through up to 10ns
I/O mouthfuls of feeding command output module (U4).
PS modules (U2) are an on-chip systems with ARM dual core processors as core, are responsible for being received by RS232 serial ports
The standard time information of rubidium atomic clock module (U1) feeding, can receive the triggering that computer is sent by Ethernet or serial ports
Temporal information.PS modules realize that programmed algorithm flow chart is referring to Fig. 3 by software c program.After system initialization, wait waiting
Receive triggered time information and verified, correct rear reception local zone time subtracts each other triggered time and current local time, obtains
Count down time, then according to predetermined program count number and sets the instruction time sequentially, then will by AXI buses
Count number (including m mentioned above and n) and be sent to the memory cell of PL modules (U3), PL modules are started afterwards and is started counting up,
And whether correctly to monitor the count status of PL modules, if an error is found, then starting subsequent cycle, the triggered time is received again.
Command output module (U4) is completed by MAX4824 modules, is responsible for receiving the logic output letter of PL modules (U3) feedings
After number, and realize that sequence control instruction is exported.MAX4824 modules are connected by PMOD interfaces with PL modules (U3), are received and are patrolled
When collecting high level, you can the corresponding contact of conducting, control instruction output is completed.
Due to the uniformity of GPS standard time, by the respective a set of sequential control list proposed by the present invention in multiple places
Unit, can realize the high-precise synchronization between the instruction of multiple spot time sequencing.
Claims (8)
1. a kind of high accuracy sequence control unit for remote multiparty control, it is characterised in that：Including rubidium atomic clock module,
PS modules, PL modules and command output module；
The PS modules communicate with one another with PL modules；The output end of the PL modules is connected with the input of command output module；
The rubidium atomic clock module is used to receive GPS standard time signal and pps pulse per second signal, and GPS standard time signal without
During effect, autonomous timing, generation is synchronized with local zone time, pulse per second (PPS) and the 100MHz frequencies of GPS standard time；
The local zone time that rubidium atomic clock module will be synchronized with the GPS standard time is sent to PS modules；Rubidium atomic clock module is by second arteries and veins
Punching and 100MHz frequencies are sent to PL modules；
The PS modules also receive information when Ethernet or serial ports receive triggered time information/zero that main control computer sends；
The PS modules subtract each other triggered time and currently received local zone time, obtain count down time；According to count down time meter
Calculate several numbers, number will be counted and sent to PL modules；
The counting number that the PL modules send on the basis of pulse per second (PPS) and 100MHz frequencies, with PS modules is counted, and is counted
Complete, produce logic output signal, and logic output signal is sent to command output module；
The logic output signal that the command output module sends according to the PL modules for receiving, and real-time implementation sequence control instruction
Output.
2. the high accuracy sequence control unit for remote multiparty control according to claim 1, it is characterised in that：Institute
Stating counting number includes that m and n, the m are the whole second number of count down time, the n be the count down time second following time and
The multiple of 10ns.
3. the high accuracy sequence control unit for remote multiparty control according to claim 2, it is characterised in that：Institute
State PL modules to be counted m-1 times on the basis of pulse per second (PPS), n+10 is counted on the basis of 100MHz frequencies8It is secondary.
4. the high accuracy sequence control unit for remote multiparty control according to claim 1, it is characterised in that：Institute
It is the on-chip system with ARM dual core processors as core to state PS modules.
5. the high accuracy sequence control unit for remote multiparty control according to claim 1, it is characterised in that：Institute
PL modules are stated for fpga logic device.
6. the high accuracy sequence control unit for remote multiparty control according to claim 1, it is characterised in that：Institute
Command output module is stated for MAX4824 modules.
7. a kind of high accuracy sequence control method for remote multiparty control, it is characterised in that：Comprise the following steps：
1) with GPS standard time signal and pps pulse per second signal, the local time signal of generation and GPS standard time high level of synchronization,
Pulse per second (PPS), 100MHz frequencies steady clock high；
2) the triggered time information for receiving main control computer transmission by Ethernet or serial ports subtracts local zone time and is counted
Number；
3) according to number, pulse per second (PPS), 100MHz frequencies is counted, start counting up, count and complete, export logic high, drive control
System instruction output.
8. the high accuracy sequence control method for remote multiparty control according to claim 7, it is characterised in that：Institute
State step 2) with step 3) be specially：
2.1) system initialization, waits triggered time information to be received and is verified, and is connect if triggered time information is received
Local zone time is received, otherwise, return continues to triggered time information；
2.2) triggered time and current local time are subtracted each other, obtain count down time, then count number and set refer to
Make time sequencing, counting number includes that m and n, the m are the whole second number of count down time, the n be count down time second with
Lower time and the multiple of 10ns；PS modules are sent to PL modules by number is counted；
2.3) counted m-1 times on the basis of pulse per second (PPS), n+10 is counted on the basis of 100MHz frequencies8It is secondary, and monitor count status and be
It is no correct, if an error is found, then starting subsequent cycle, the triggered time is received again；Logic high is otherwise exported, control is driven
System instruction output.
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Cited By (4)
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| CN107193207A (en) * | 2017-07-28 | 2017-09-22 | 中国电子科技集团公司第五十四研究所 | A kind of multi-mode rubidium clock calibrating installation for scatter communication |
| CN110488291A (en) * | 2019-08-23 | 2019-11-22 | 成都航天科工微电子系统研究院有限公司 | A kind of biradical Forward-looking SAR Hardware In The Loop Simulation Method and device |
| CN110865406A (en) * | 2019-11-28 | 2020-03-06 | 湖南率为控制科技有限公司 | Multi-sensor data synchronous processing system and method based on vehicle-mounted GPS time service system |
| CN111707851A (en) * | 2020-05-05 | 2020-09-25 | 许昌开普检测研究院股份有限公司 | Multi-channel alternating current signal state sequence sequential control generator |
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Application publication date: 20170531 |