CN107479530A - A kind of method of the SOE resolution ratio less than 1ms between realizing control station - Google Patents
A kind of method of the SOE resolution ratio less than 1ms between realizing control station Download PDFInfo
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- CN107479530A CN107479530A CN201710633839.2A CN201710633839A CN107479530A CN 107479530 A CN107479530 A CN 107479530A CN 201710633839 A CN201710633839 A CN 201710633839A CN 107479530 A CN107479530 A CN 107479530A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004364 calculation method Methods 0.000 claims description 7
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- 238000012360 testing method Methods 0.000 description 6
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- 230000002123 temporal effect Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
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- 230000001360 synchronised effect Effects 0.000 description 2
- 230000002547 anomalous effect Effects 0.000 description 1
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- 239000000700 radioactive tracer Substances 0.000 description 1
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Classifications
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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
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
- G05B23/0286—Modifications to the monitored process, e.g. stopping operation or adapting control
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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
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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- Automation & Control Theory (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
The present invention provides a kind of method of the SOE resolution ratio less than 1ms between realizing control station, the present invention using same clock source hardwire mode when being transmitted pair in the case of synchronizing signal, by the timer of SOE equipment, rationally utilize uniformity compensation algorithm, time error after during SOE equipment pair can be controlled in rational scope, make in DCS system that resolution ratio is less than 1ms between SOE control stations.
Description
Technical field
The present invention relates to nuclear power digitlization instrument control systems technology field, particularly relates to one kind and realizes SOE resolutions between control station
Rate is less than 1ms method.
Background technology
SOE signals be after a kind of change of tracer signal state and during signal intensity relative instant on-off model, typically
For in the full factory's DCS system of nuclear power station or nuclear power station experimental data acquisition system/test-meter system, being mainly used in accident point
Analysis, position mark and experiment between the runtime of power station, SOE equipment are used for the nuclear island parameter that monitored for prolonged periods of time need to record, or monitoring and
Record variable state, for analyzing result of the test and transient process.
SOE equipment by after long-play it is possible that phenomena such as passage failure, error of omission, incorrect posting.For example have
When SOE record anomalous event order or interval be logically apparent error, then be difficult to determine in crash analysis
Cause of accident, it can not correctly judge initiating event point.
The sequencing that SOE event major concerns event occurs, i.e. mistake of the system to relative instant value between sequence of events
Poor precision, it is generally divided into two kinds of typical cases：Resolution ratio between SOE signal control station intrinsic resolution 1ms, SOE signal control stations
2ms.Many SOE signals have been carried out control station intrinsic resolution 1ms at present, but to reach the resolution ratio of 1ms between control station, are being
Higher requirement is required in system framework, hardware design and software algorithm, is implemented relative complex and difficult.
And the full factory DCS of nuclear power station SOE resolution ratio is higher；Nuclear power station whole system pair when precision can just do it is more preferable.
All SOE equipment of internal system is required for keeping strict Timing synchronization, but SOE equipment is in itself with respective crystalline substance
Bestir oneself for the basis of time counting, due to the error of crystal oscillator itself and the difference of each equipment room, inevitably occur that SOE is set
The difference of time counting between standby, the time counting difference that eliminate or reduce between SOE equipment, it is necessary to by it is same when
Zhong Yuan sends synchronizing signal, typically there is two kinds of synchronous transmission of signal modes：A kind of is the form by hardwire to institute in system
There is SOE equipment to send synchronizing signal；A kind of is to send synchronous letter to all SOE equipment in system by the form of communication message
Number.
Synchronizing signal when the SOE equipment inside many DCS systems is all the form pair using communication message at present, due to logical
When believing that message required time is longer, and reaching the processing pair of inconsistent at the time of SOE equipment or SOE equipment at the time of synchronizing signal
Inconsistent, accuracy when causing pair is inadequate.
And using the system of synchronizing signal during hardwire transmission pair, due to the SOE equipment to different control stations can not be accomplished
Pair when, SOE device resolutions do not reach 1ms between will also result in control station.The SOE equipment synchronizing signal when being connected to pair in itself simultaneously
Afterwards, its least count cycle does not accomplish below 1ms, pair when after backoff algorithm design it is unreasonable, caused by these composite factors
SOE device resolutions do not reach 1ms between standing.
No matter using which kind of Timing synchronization signal transmission form, it is required for SOE equipment to be based on synchronizing signal, using certain
Algorithm is modified compensation to time counting error itself, to reach the resolution ratio for being less than 1ms between control station.
The content of the invention
Situation of the purpose of the present invention aiming at above-mentioned prior art, it is proposed that SOE is differentiated between one kind realizes control station
Rate is less than 1ms method, to solve the DCS system with synchronizing signal during hardwire transmission pair due to that can not accomplish to different controls
When making the SOE equipment pair at station, and SOE device resolutions do not reach asking for 1ms between control station caused by backoff algorithm is unreasonable
Topic.
The purpose of the present invention is achieved through the following technical solutions：SOE resolution ratio is less than between one kind realizes control station
1ms method, the described method comprises the following steps：
S1, according to worst error calculation formula, set the step-length of the timer of SOE equipment；
S2, pair when clock source periodically the timer of control station SOE equipment is set time；
If S3, timer timing are then, SOE equipment enters scheduled service routines, calculates the time counting of SOE equipment
Value；
S4, SOE equipment reporting relatively obtained according to the time counting value and theoretical value of SOE equipment, mended with uniform
The backoff interval number in cycle when algorithm calculates next pair is repaid, service routine when jumping out pair；
S5, according to backoff interval number cycle at next pair is compensated：If timer timing is then, SOE equipment
Into scheduled service routines, backoff interval variable adds 1, judges whether this needs to carry out time benefit according to backoff interval variable
Repay, backoff interval variable count down to S4 backoff interval number, and with regard to carrying out a time bias, backoff interval variable is reset, otherwise
This is without time bias.
Further, the clock source was set time every 1 minute timer to control station SOE equipment.
Further, the timing cycle of the timer is 0.5ms.
Further, the worst error of the SOE equipment is：
Further, step-length H >=40ns of the SOE equipment timer.
Further, it is 0.047ms that the SOE equipment, which has compensated maximum theoretical error, in 1 minute.
The beneficial effects of the invention are as follows：
The present invention using same clock source hardwire mode when being transmitted pair in the case of synchronizing signal, it is only necessary to by
The timer of SOE equipment, rationally utilize uniformity compensation algorithm, it is possible to closing the time error control after during SOE equipment pair
In the range of reason, make in DCS system that resolution ratio reaches 1ms between SOE control stations.
According to sample tests, before not compensating, sample is+208us relative to the error of time corrector in 1 minute ---+
216us, after compensating, sample is -24us ---+16us relative to the error of time corrector in 1 minute, and time precision substantially carries
It is high.
Brief description of the drawings
Fig. 1, which is that the present invention is a kind of, realizes system where the SOE equipment of method of the SOE resolution ratio less than 1ms between control station
Paralell composition；
Fig. 2 is a kind of flow chart for realizing method of the SOE resolution ratio less than 1ms between control station of the present invention.
Embodiment
Below in conjunction with the accompanying drawings it is a kind of the present invention realize control station method of the SOE resolution ratio less than 1ms do and further retouch
State：The embodiment is only illustrative of the invention and is not intended to limit the scope of the invention, and those skilled in the art are to the present invention's
The modification of the various equivalent form of values falls within the application appended claims limited range.
As shown in figure 1, set for a kind of SOE for realizing method of the SOE resolution ratio less than 1ms between control station of the present invention
The paralell composition of standby place system, the time corrector of clock source is by way of hardwire to the SOE of all control stations in system
Synchronizing signal during equipment transmission pair, the clock source passed through time corrector every 1 minute to be carried out to the timer of control station SOE equipment
Pair when, the timing cycle of the timer of the SOE equipment is 0.5ms.
Compensated when SOE equipment receives pair after synchronizing signal using counting of the uniformity compensation algorithm to SOE equipment, with
Reach the interior SOE resolution ratio between station in station and be less than 1ms.
Referring to Fig. 2, a kind of described method of the SOE resolution ratio less than 1ms between realizing control station, methods described includes following
Step：
S1：According to worst error calculation formula, the step-length of the timer of setting SOE equipment；
S2：Clock source was set time every 1 minute by time corrector to the timer of control station SOE equipment, and the SOE is set
The timing cycle of standby timer is 0.5ms；
S3:If timer timing is then, SOE equipment enters scheduled service routines, calculates the time counting of SOE equipment
Value；
S4：Time difference is relatively obtained according to the time counting value and theoretical value of SOE equipment, utilizes uniformity compensation algorithm meter
Backoff interval number when calculating next pair in the cycle, service routine when jumping out pair.
S5：Cycle at next pair is compensated according to backoff interval number：If timer timing is then, SOE equipment
Into scheduled service routines, backoff interval variable adds 1, judges whether this needs to carry out time benefit according to backoff interval variable
Repay, backoff interval variable count down to S4 backoff interval number, and with regard to carrying out a time bias, backoff interval variable is reset, otherwise
This is without time bias.
The timing cycle of the timer of the SOE equipment is 0.5ms, i.e. mono- counting of 0.5ms.
The time counting value of the SOE equipment, the i.e. time counting of SOE equipment in itself, it is for being carried out pair with time corrector
Than time and the time corrector time difference of calculating SOE equipment, for calculating SOE equipment times and standard time corrector time
Deviation.
The backoff interval number, i.e., how long to be spaced could carry out a time bias.
The compensation cycle refer to time corrector to SOE equipment school constantly, SOE equipment is according to its temporal and time corrector time
Deviation, calculate to need to be spaced and just do a time bias how many individual 0.5ms time-count cycles, then in follow-up 1 minute,
The every 0.5ms of SOE equipment, backoff interval variable add 1, until backoff interval variable reaches the space-number of above-mentioned school computing
Value.
The time counting value of SOE equipment is a variate-value of SOE equipment self maintaineds, per 0.5ms timing then, the change
Value adds 1.
120000 i.e. 1 minute/0.5ms, if the time counting value meter of SOE equipment to 120000, when meaning that SOE equipment
Between meter by 1 minute.
The time theory count value N/H of SOE equipment,
The time counting value Y of SOE equipment,
The time counting value of SOE equipment and the difference B of theoretical value；
Backoff interval number L=M/B；
Worst error calculation formula：
G：After worst error after overcompensation, i.e. time bias, between SOE equipment its temporal and time corrector time
Difference；
H：Time bias step-length, minimum 40ns；
L：How many times interrupt one H of post-compensation, are expressed as L=Z+X, and Z is integer, and X is decimal, when X is zero, L=Z；
E：Error of the actual offset (value for casting out L decimal post-compensation) between F；
M：120000,1 minutes numbers for producing 0.5ms Interruptions；
N：Pair when time cycle；
F:Drawn after calculating due to error caused by time bias step-length；
The result come out according to such scheme theory deduction compensated for the SOE equipment in 1 minute it is maximum it is theoretical by mistake
Difference is 0.047ms.
The H time biass step size settings of SOE equipment timers are 4us, when signal arrives at 1 minute pair, SOE equipment when
Between theoretical count value should be 1500000 (60s/4us)；
Before compensation, in test 16 minutes, test sample pair when signal arrive when, the time counting value of SOE equipment and reason
By the difference of value 1500000 in 52-54, i.e. time phase difference 208us-216us of the time of SOE equipment and time corrector.
After increasing backoff algorithm, in test 16 minutes pair when precision, compensation calculation verification process is as follows：
Pair 1) when signal arrives when, the time counting value Y of SOE equipment is calculated, calculates Y and the difference of theoretical value 1500000
B, i.e. SOE equipment need the number that compensates to be used as the compensation basis of follow-up 1 minute in follow-up 1 minute；Calculate SOE equipment rooms
Compensation is interrupted every how many individual 0.5ms once, i.e. 120000/B；
2) sample tests, when signal arrives at first pair, the time counting value and theoretical value of SOE equipment
1500000 difference is that 52, SOE equipment needs the individual 0.5ms in interval 2307 (i.e. 120000/52) to interrupt compensation once；
3) in follow-up 1 minute, when each 0.5ms interrupts arrival, the number that 0.5ms is interrupted first is judged, if reached
2307, compensate for once, signal arrives when the second pair；
4) after backoff algorithm, in 15 minutes, the numerical value that the time counting of SOE equipment per minute differs with theoretical value is
3, -5,3, -4,3, -6,3, -5,3, -7,4, -1,3, -5,4, i.e., the time of SOE equipment per minute and the time error of time corrector
Respectively 12us, -20us, 12us, -16us, -24us, 12us, -20us, 12us, -28us, 16us, -4us, 12us, -20us,
16us；Single theoretical maximum error calculation is drawn；
5) between so, standing time error relative between SOE equipment between single SOE equipment and time corrector error two
Times, the measuring and calculation more than, the time error between standing between SOE equipment is up to 56us, is fully able to point for meeting 1ms
Resolution.
The present invention, from same clock source to synchronizing signal during the transmission pair of all control stations, owns by way of hardwire
SOE equipment carries out the compensation of its temporal deviation based on the synchronizing signal.SOE equipment is entered with the 0.5ms counting cycle
Row timing, by uniformity compensation principle, rational adjustment compensation number and compensation step-length so that after all SOE equipment replacements
Precision is much smaller than 0.5ms, to reach the resolution ratio of the 1ms between control station in control station.
Claims (6)
1. a kind of method of the SOE resolution ratio less than 1ms between realizing control station, it is characterised in that the described method comprises the following steps：
S1, according to worst error calculation formula, set the step-length of the timer of SOE equipment；
S2, pair when clock source periodically the timer of control station SOE equipment is set time；
If S3, timer timing are then, SOE equipment enters scheduled service routines, calculates the time counting value of SOE equipment；
S4, SOE equipment reporting relatively obtained according to SOE equipment time counting values and theoretical value, calculated using uniformity compensation
Backoff interval number when method calculates next pair in the cycle, service routine when jumping out pair；
S5, according to backoff interval number cycle at next pair is compensated：If timer timing is then,
SOE equipment enters scheduled service routines, and backoff interval variable adds 1, according to backoff interval variable judge this whether needs
Time bias is carried out, backoff interval variable count down to S4 backoff interval number, with regard to carrying out a time bias, backoff interval variable
Reset, otherwise this is without time bias.
A kind of 2. method of the SOE resolution ratio less than 1ms between realizing control station according to claim 1, it is characterised in that institute
Clock source is stated to set time every 1 minute timer to control station SOE equipment.
A kind of 3. method of the SOE resolution ratio less than 1ms between realizing control station according to claim 1, it is characterised in that institute
The timing cycle for stating timer is 0.5ms.
A kind of 4. method of the SOE resolution ratio less than 1ms between realizing control station according to claim 1, it is characterised in that institute
The worst error for stating SOE equipment is：
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A kind of 5. method of the SOE resolution ratio less than 1ms between realizing control station according to claim 4, it is characterised in that institute
State step-length H >=40ns of SOE equipment timers.
A kind of 6. method of the SOE resolution ratio less than 1ms between realizing control station according to claim 4, it is characterised in that institute
It is 0.047ms to state the theoretical maximum error that SOE equipment has been compensated in 1 minute.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1801023A (en) * | 2005-11-14 | 2006-07-12 | 杨卫民 | Multi-event sequential recording and testing system |
| CN101145896A (en) * | 2007-09-17 | 2008-03-19 | 浙江中控技术有限公司 | Control system and method for clock synchronization between control stations |
| CN101986217A (en) * | 2010-11-03 | 2011-03-16 | 江阴众和电力仪表有限公司 | Accurate measurement and elimination method of maximum accumulative error of time of sequence of event |
| CN102081400A (en) * | 2011-02-17 | 2011-06-01 | 北京和利时系统工程有限公司 | Sequence of event (SOE) recording module and adjusting method thereof |
| CN105450323A (en) * | 2015-11-11 | 2016-03-30 | 杭州和利时自动化有限公司 | SOE time synchronization control method and system |
| CN109302255A (en) * | 2018-09-12 | 2019-02-01 | 杭州和利时自动化有限公司 | Time synchronization control method, device, system and computer readable storage medium |
-
2017
- 2017-07-29 CN CN201710633839.2A patent/CN107479530B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1801023A (en) * | 2005-11-14 | 2006-07-12 | 杨卫民 | Multi-event sequential recording and testing system |
| CN101145896A (en) * | 2007-09-17 | 2008-03-19 | 浙江中控技术有限公司 | Control system and method for clock synchronization between control stations |
| CN101986217A (en) * | 2010-11-03 | 2011-03-16 | 江阴众和电力仪表有限公司 | Accurate measurement and elimination method of maximum accumulative error of time of sequence of event |
| CN102081400A (en) * | 2011-02-17 | 2011-06-01 | 北京和利时系统工程有限公司 | Sequence of event (SOE) recording module and adjusting method thereof |
| CN105450323A (en) * | 2015-11-11 | 2016-03-30 | 杭州和利时自动化有限公司 | SOE time synchronization control method and system |
| CN109302255A (en) * | 2018-09-12 | 2019-02-01 | 杭州和利时自动化有限公司 | Time synchronization control method, device, system and computer readable storage medium |
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