CN107168163A - A kind of submicrosecond Multi-path synchronous triggering device and its triggering method - Google Patents
A kind of submicrosecond Multi-path synchronous triggering device and its triggering method Download PDFInfo
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- CN107168163A CN107168163A CN201710390970.0A CN201710390970A CN107168163A CN 107168163 A CN107168163 A CN 107168163A CN 201710390970 A CN201710390970 A CN 201710390970A CN 107168163 A CN107168163 A CN 107168163A
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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
- G05B2219/21—Pc I-O input output
- G05B2219/21073—Each module has push button, trigger circuit to initialise address setting
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Abstract
The present invention relates to a kind of submicrosecond Multi-path synchronous triggering method, this method is as follows：During the trigger pulse arrival effect end that instrument is produced, echo-signal, via the detection and analysis of instrument, completes the detection and estimation of trigger signal transmission delay by along the output end that original signal is back to original signal identical path.The present invention discloses a kind of submicrosecond Multi-path synchronous triggering device.The triggering device and triggering method of the present invention are based on the detection function of possessing signal transmission path delay with footpath echo detecting technology, and the real-time monitoring in trigger signal path delay can be achieved；The triggering method of the present invention realizes that trigger signal acts on the high-precise synchronization at moment using delay compensation technique, can effectively overcome the influence of multiplexing path difference, the Striking symmetry without ensureing signal transmission path according to maximum inclusion principle.
Description
Technical field
The invention belongs to technical field of automation, and in particular to a kind of submicrosecond Multi-path synchronous triggering device and its triggering side
Method, the apparatus and method can be applied in ARCHITECTURE OF DISTRIBUTED ENGINEERING DBMS observing and controlling environment, and signal transmission path delay is estimated and mended
Repay, ensure that trigger signal acts on the high-precise synchronization at moment, or when strictly accurately ensureing the priority of multichannel trigger signal
Order relation.
Background technology
It is past in order to realize the comprehensive measurement, dynamic tracking and equipment control of burst procedures in distributed measurement and control area
It is past to need to ensure multiple devices triggering moment precise synchronization or with strict priority sequential relationship.
However, because device location is scattered, the trigger signal transmission path difference reason such as substantially is accurate to ensure equipment triggering
Synchronism be always a problem.
At present, the triggering device of the problem, technical measures can be solved to a certain extent to generally include：Symmetric path
Method, uniform time reference (UTC) method etc..The subject matter that these means still have is that performance difficulty, precision be low, cost is high,
The shortcomings of synchronous effect can not be monitored in real time.
The content of the invention
The present invention proposes a kind of submicrosecond Multi-path synchronous triggering device and its triggering method, this triggering device and its triggering
Method possess signal transmission path delay estimate detection function and program control compensation function, can effectively ensure that trigger signal work
With the synchronism at moment；It is also possible to the sequence trigger switch of multi-channel high-accuracy be realized, to data collecting instrument, oscillography
Trigger delay, the relative accuracy of time reference of device carry out the miscellaneous function such as detecting.
In order to achieve the above object, the technical scheme is that：
A kind of submicrosecond Multi-path synchronous triggering method, during the trigger pulse arrival effect end that instrument is produced, echo-signal will
Along the output end that original signal is back to original signal identical path, via the detection and analysis of instrument, complete trigger signal and pass
The detection and estimation of defeated delay.
A kind of submicrosecond Multi-path synchronous triggering device, including master controller, the internal system that is connected with master controller
Clock selftest module and cable compensation for calibrating errors module；
Described internal system clock selftest module includes GPS/ Big Dippeves time service unit, local clock circuit, clock driving
Unit, voltage controlled temperature compensation crystal oscillator and triggering logic array；Described master controller connects the GPS/ Big Dippeves by UART serial ports
Time service unit, GPS/ Big Dippeves time service unit connection local clock circuit, described local clock circuit passes through clock driver cell
Voltage controlled temperature compensation crystal oscillator is connected, voltage controlled temperature compensation crystal oscillator passes through digital analog converter DAC connection master controllers, the triggering
Logic array is connected with master controller；
Described cable compensation for calibrating errors module include input array, precision timing/alignment unit, programmable delay array,
Concatenation unit and output driving matrix unit；Described input array access triggering logic array and precision timing/alignment unit,
Precision timing/alignment unit is connected by SPI buses with master controller, and described programmable delay array passes through spi bus
It is connected with master controller, programmable delay array is connected by I/0 mouthfuls of multichannel and triggering logic array, described concatenation unit
It is connected with triggering logic array, programmable delay array is connected with output driving matrix unit.
The external touch screen displays of described master controller and base interface unit.
Described voltage controlled temperature compensation crystal oscillator frequency is 20MHz.
Beneficial effects of the present invention：
1. the triggering device and triggering method of the present invention are based on footpath echo detecting technology, possesses signal transmission path delay
Detection function, can be achieved trigger signal path delay real-time monitoring；
2. the triggering method of the present invention is according to maximum inclusion principle, when realizing trigger signal effect using delay compensation technique
The high-precise synchronization at quarter, can effectively overcome the influence of multiplexing path difference, without ensureing the strict of signal transmission path
Symmetrically；
3. GPS/ Big Dipper time service units built in the triggering device of the present invention, it is ensured that the long-time stability of internal clocking；
4. the triggering device of the present invention both can be used for generating synchronizing signal, it can also generate with strict sequential order relation
Train pulse signal.
Fig. 1 is the present invention with footpath echo delay predictive compensation technical schematic diagram.
Fig. 2 is synchronizer trigger theory of constitution figure.
Fig. 3 is multichannel trigger signal generating unit theory of constitution figure.
Embodiment
The present invention is further detailed below in conjunction with the accompanying drawings, a kind of submicrosecond Multi-path synchronous triggering device and its touch
Forwarding method, a kind of submicrosecond Multi-path synchronous triggering method, during the trigger pulse arrival effect end that instrument is produced, echo-signal is by edge
The output end of original signal is back to original signal identical path, via the detection and analysis of instrument, trigger signal transmission is completed
The detection and estimation of delay.The above method is based on the detection function of possessing signal transmission path delay with footpath echo detecting technology,
The real-time monitoring in trigger signal path delay can be achieved；
The concrete principle of the above method is as follows：
Fig. 1 is measuring principle figure of the inventive method cable with footpath round trip delay time.
By taking any output signal channel as an example：The trigger pulse that instrument is produced can use two kinds of optical signal or electric signal
Form is sent, and composite signal cable (electric signal) progress that composite optical/electrical cable (optical signal) or twin-core are shielded respectively is respectively adopted
Transmission, when the photosignal arrival of triggering acts on end, echo-signal will be back to former letter along with original signal identical path
Number output end, via the detection and analysis of instrument, you can complete trigger signal transmission delay detection and estimation.
By detection, the path delay time in signals transmission on all passages can be obtained.Assuming that all passages
Time delay collection be combined into { τ1,τ2,...,τN, wherein τmaxIt is the maximum in N number of delay time parameter, i.e. τmax=Max
(τ1,τ2,...,τN), then, using program control delay line, as long as carrying out appropriate delay for each passage, you can realize all
The purpose of precise synchronization when passage arrival acts on end.The computational methods of time delay are：Give i-th of signalling channel, its signal
Output additional delay ti=τmax-τi, wherein：i∈[1,N].
First, the synchronous detection and compensation of multiple trigger ports are completed according to the method described above, and then, optional two triggerings are logical
Road, might as well be labeled as passage A, passage B, wherein, passage A output signals are (outer to touch as the trigger signal of data acquisition equipment
Hair), on the source signal passage of passage B output signal access data acquisition equipment, set the mode of operation of data acquisition equipment as
Single acquisition, triggering mode is " external trigger ".Trigger signal on A channel is pulse, and rising edge is effective；Channel B signal by
Time interval is TNTwo pulses composition；A channel rising edge of a pulse is with first rising edge of a pulse of channel B at intervals of T0.It is aobvious
So, TNAnd T0All it is that benchmark is used as using the clock inside synchronizer trigger.
When data acquisition equipment is using A channel signal as trigger signal, after the test record for completing channel B signal, by dividing
Analysis, can respectively obtain the relative spacing T' of two pulses of channel BN, and trigger position is with respect to the rising edge of a pulse of channel B first
Time delay T'0.Then, the internal clocking of data acquisition equipment and triggering instrument reference clock frequency ratio are rclk=T'N/TN；
So, on the basis of triggering the clock inside instrument, the external trigger delay characteristic time of data acquisition equipment is：τλ=T'0/
rclk-T0。
The design of synchronizer trigger
Referring to Fig. 2, a kind of submicrosecond Multi-path synchronous triggering device, including master controller, be connected with master controller
Internal system clock selftest module and the compensation of cable time calibration and multichannel trigger signal generation module；
Described internal system clock selftest module includes：GPS/ Big Dippeves time service unit, local clock circuit, clock driving
Unit, frequency compensate crystal oscillator and triggering logic array for 20MHz voltage controlled temperature；Described master controller passes through DART serial ports
Connect GPS/ Big Dipper time service units, GPS/ Big Dippeves joint time service unit connection local clock circuit, described local clock circuit
Voltage controlled temperature is connected by clock driver cell and compensates crystal oscillator, voltage controlled temperature compensates crystal oscillator and patrolled by master controller connection triggering
Collect array；
The effect of this module：The pulse per second (PPS) of GPS/ Big Dippeves time service unit output, the frequency to local clock circuit connects in real time
Measure, voltage controlled temperature compensation crystal oscillator is micro-adjusted by microcontroller calculation error, and using error, so as to protect continuously
Demonstrate,prove local clock circuit steady in a long-term relative to the satellite clock frequency of global positioning system.
Described cable time calibration compensation includes with multichannel trigger signal generation module：Input array, precision timing/school
Quasi- unit, programmable delay array, concatenation unit and output driving matrix unit；Described input array access triggering logic array
Row and precision timing/alignment unit, precision timing/alignment unit and programmable delay array are all controlled by spi bus and center
Device connection processed, programmable delay array is connected by I/0 mouthfuls of multichannel and triggering logic array, and described concatenation unit is patrolled with triggering
Collect array to be connected, programmable delay array is connected with output driving matrix unit.
Triggering the effect of logic array includes several aspects：One is to provide a variety of trigger source options, such as manual triggering, UTC
Regularly, outside source triggering etc., two be the logic control for realizing sequence trigger switch, and the output of each trigger port enable control
System, in addition, the part also realizes that cascade provides logic and supported for equipment.
Output driving matrix unit provides signal driving function for each road trigger port, realizes the impedance of output channel
Match somebody with somebody；In addition, being programmable delay array in the front end that each channels drive is inputted, by way of serial programming, controlled by center
Device processed adjusts the signal delay of each passage, realizes the compensation of the transmission delay of multiple signals.
The external touch screen displays of described master controller and base interface unit.
The effect of this module is the compensation of cable time calibration and produces multichannel trigger signal.Cable time calibration compensation method
Above describing, the generation process of lower multichannel trigger signal is described here.
Fig. 3 is multichannel trigger signal generating unit theory of constitution figure of the present invention, and this element is mainly supplemented and synchronously touched in Fig. 2
The various modes input for sending out triggering logic array in device entire block diagram and the function detail figure for carrying out model selection, while it is combined
Programmable delay controller and output array realize that multichannel trigger signal occurs.
The multichannel trigger signal generating unit includes：Input block part, time-delay/timing unit, MUX, can
Programmed delays array and driving matrix etc..Wherein, trigger signal importation includes simulation input, the manually subelement such as triggering.
MUX is responsible for selecting one from a variety of trigger sources as initial trigger signal, and the signal passes through to be directly gone to by cable is same
The detection for returning the measurement of time delay is obtained from analysis after different delays, for being formed most via the driver element of each passage
Whole multichannel trigger signal.
The specific work process of apparatus of the present invention is described below：
Step one, after upper electricity, clock is tamed, this process is obtained 4-5 minutes.First, GPS/ Big Dippeves time service unit is ready simultaneously
Export UTC pps pulse per second signals.The pulse is defeated together with the pulse of the inside voltage controlled temperature compensation crystal oscillator (local oscillator) after overdriving
Enter local clock unit.Local clock unit carries out in real time, continuously measuring to local frequency, and its result reflects local frequency
And the deviation of UTC clock frequencies.Master controller is according to the deviation of frequency, using digital analog converter (DAC) output voltage
Trickle adjustment is carried out to voltage controlled temperature compensation crystal oscillator, so as to ensure local clock reference frequency defending relative to global positioning system
Star clock frequency is steady in a long-term.Local clock circuit access triggering logic array after taming, essence is provided for triggering logic array
Really stable clock frequency, realizes synchronous/order, and the function such as set interval.
Step 2, the equipment of the triggering used required for connection simultaneously measures triggering cable.After the completion of triggering cable connection,
In the presence of master controller, transmission delay that can be one by one to the cable of every triggering is measured.Its process is：Control at center
The timing of precision timing unit is stopped input first and is switched on measured passage by device processed, meanwhile, by tested passage
Programmable delay, which is set, to reset；Then, initial trigger signal is generated by software command, the signal via MUX,
The pulse output formed after programmable delay controller and driver element is designated as Pa, and Pa is via triggering cable transmission and returns tactile
The pulse of hair instrument formation is designated as Pb.Precision timing/alignment unit measurement acquisition pulse Pb and Pa time difference, that is, wire are past
Return the time.Master controller calculates the time for needing to compensate according to the two-way time of wire transmission.It should be noted that：Measurement is touched
When sending out Cable delay, equipment will produce trigger signal, if this equipment is connected with the equipment for needing to trigger, can cause false triggering.
Step 3, many test equipments of synchronous triggering.After the transmission delay of all triggering cables is all measured, center control
Device processed can carry out the setting of delay compensation according to test result to every trigger port.After the completion of, you can connection needs triggering
Equipment, select effective trigger port, system be ready by button or man-machine interactive operation, wait trigger source to touch
Hair.External trigger button, or the forced-triggered button clicked in screen can be used repeatedly to be triggered on instrument.To
Handover trigger pattern, clicks on after stop button, can be operated.
In addition, multichannel sequence trigger switch is similar with the operation of synchronous triggering, only need to be before arm button be clicked on, in respective channel
The Time delay time required for input.
Finally, the equipment can also be cascaded with multichannel equipment, realize the synchronous triggering requirement of more equipment.
Apparatus of the present invention can be additionally used in data collecting instrument, the trigger delay of oscillograph, the relative accuracy of time reference and carry out
The miscellaneous functions such as detection.
Present disclosure is not limited to cited by embodiment, and those of ordinary skill in the art are by reading description of the invention
And any equivalent conversion taken technical solution of the present invention, it is that claim of the invention is covered.
Claims (4)
1. a kind of submicrosecond Multi-path synchronous triggering method, it is characterised in that：During the trigger pulse arrival effect end that instrument is produced, return
Ripple signal, via the detection and analysis of instrument, completes to touch by along the output end for being back to original signal with original signal identical path
The detection and estimation of signalling transmission delay.
2. a kind of submicrosecond Multi-path synchronous triggering device, it is characterised in that：It is connected including master controller, with master controller
Internal system clock selftest module and cable compensation for calibrating errors module；
Described internal system clock selftest module includes GPS/ Big Dippeves joint time service unit, local clock circuit, clock driving
Unit, voltage controlled temperature compensation crystal oscillator and triggering logic array；Described master controller connects the GPS/ Big Dippeves by UART serial ports
Joint time service unit, GPS/ Big Dippeves joint time service unit connection local clock circuit, described local clock circuit passes through clock
Driver element connection voltage controlled temperature compensation crystal oscillator, voltage controlled temperature compensates crystal oscillator and connects master controller, institute by digital analog converter
Logic array is stated to be connected with master controller；
Described cable compensation for calibrating errors module includes input array, precision timing/alignment unit, programmable delay array, cascade
Unit and output driving matrix unit；Described input array access triggering logic array and precision timing/alignment unit are accurate
During survey/alignment unit is connected by spi bus with master controller, described programmable delay array is by spi bus with
Heart controller is connected, and programmable delay array is connected by I/0 mouthfuls of multichannel and triggering logic array, and described concatenation unit is with touching
Send out logic array to be connected, programmable delay array is connected with output driving matrix unit.
3. submicrosecond Multi-path synchronous triggering device according to claim 2, it is characterised in that：Outside described master controller
Contact panel type display and base interface unit.
4. the submicrosecond Multi-path synchronous triggering device according to Claims 2 or 3, it is characterised in that：Described voltage controlled temperature
Compensation crystal oscillator frequency is 20MHz.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710390970.0A CN107168163A (en) | 2017-05-27 | 2017-05-27 | A kind of submicrosecond Multi-path synchronous triggering device and its triggering method |
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| CN201710390970.0A CN107168163A (en) | 2017-05-27 | 2017-05-27 | A kind of submicrosecond Multi-path synchronous triggering device and its triggering method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107817721A (en) * | 2017-10-26 | 2018-03-20 | 上海乐耘电气技术有限公司 | Electric power wave-recording synchronous data sampling system |
| CN108918957A (en) * | 2018-05-30 | 2018-11-30 | 广东电网有限责任公司 | A kind of power transmission and distribution current detection means synchronous based on GPS clock |
| CN109194313A (en) * | 2018-08-16 | 2019-01-11 | 歌尔股份有限公司 | Memory unit access control system, method and apparatus |
| CN110108916A (en) * | 2019-05-27 | 2019-08-09 | 西安交通大学 | A kind of synchronous triggering device and triggering method with multi-stage digital delay function |
| CN110928177A (en) * | 2019-11-14 | 2020-03-27 | 上海咏昕信息科技有限公司 | Clock synchronization system and method |
| CN111556224A (en) * | 2020-05-20 | 2020-08-18 | 武汉四维图新科技有限公司 | Multi-camera synchronous calibration method, device and system |
| CN111694790A (en) * | 2020-06-15 | 2020-09-22 | 浪潮集团有限公司 | Feedback type cascade board card synchronous processing method based on FPGA |
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| CN111694790A (en) * | 2020-06-15 | 2020-09-22 | 浪潮集团有限公司 | Feedback type cascade board card synchronous processing method based on FPGA |
| CN111694790B (en) * | 2020-06-15 | 2023-08-29 | 浪潮集团有限公司 | FPGA-based feedback type cascade board card synchronous processing method |
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