CN108982137A - A kind of RTU starting fatigue experimental device and method - Google Patents
A kind of RTU starting fatigue experimental device and method Download PDFInfo
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Abstract
The present invention discloses a kind of RTU starting fatigue experimental device and method.Described device includes: tested RTU, controls the electronic switch of tested RTU on/off, controller；The one-bit digital amount output port DO of tested RTU is connected with the one-bit digital amount input port DI of controller, and the one-bit digital amount output port DO of controller is connected with the control terminal of electronic switch.Present invention firstly provides RTU to start fatigue test method, and devises experimental rig, can be automatically performed RTU starting fatigue test using described device and substantially reduce test period compared with traditional fatigue test, convenient for quickly understanding the starting performance of product.The test data of acquisition can provide strong support for the research of RTU life cycle.
Description
Technical field
The invention belongs to RTU (Remote Terminal Unit, remote-terminal unit) technical fields, and in particular to a kind of
RTU starts fatigue experimental device and method.
Background technique
RTU is mainly used for the monitoring and control to on-site signal, industrial equipment.RTU is to constitute Enterprise Integrated Automation system
The core apparatus of system is usually made of signal input/output module, microprocessor, wire/wireless communication module and power supply etc..
RTU can realize enterprise central monitoring with scheduling system to the telemetering of production scene primary instrument, remote control, remote signalling and remote regulating well
Etc. functions.
Very big starting current is generated when RTU starts, and can reach 5~10 times or more of running current sometimes.Therefore,
RTU starting is very big to the service life of RTU or life cycle environmental impact, and there is a degree of detraction in every its primary service life of starting.Practice
Show to influence the number of starts that the most important factor of RTU normal service life is RTU.It is 10 for a normal service life
The RTU in or so year, by the primary calculating of starting daily, a RTU can be successfully started up continuously 3650 times or so.When RTU is successfully opened
Often there is the phenomenon that starting fails more than half failure state after certain numerical value, is just in dynamic number；The number of starts is further added by one
After fixed number amount, RTU cannot will normally start completely in full failure or distress condition.Therefore, can with RTU maximum continuously at
The function number of starts, and successfully start up number account for the number of starts ratio start success rate etc. indicate RTU service life length or
Performance superiority and inferiority.
The service life of electronic device is generally obtained by fatigue test.The present invention designs a kind of dress for RTU fatigue test
It sets, unlike common fatigue test, the present invention detects the superiority and inferiority of its starting performance by starting tested RTU repeatedly, because
It is that RTU starts fatigue test that this, which is also known as this fatigue test,.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the present invention propose a kind of RTU starting fatigue experimental device with
Method detects the superiority and inferiority of RTU starting performance using described device by repeating starting test to tested RTU.
To achieve the above object, the present invention adopts the following technical scheme:
The present invention provides a kind of RTU starting fatigue experimental device, comprising: tested RTU controls tested RTU on/off
Electronic switch, controller.The one-bit digital amount input port DI phase of the one-bit digital amount output port DO and controller of tested RTU
Even, the one-bit digital amount output port DO of controller is connected with the control terminal of electronic switch.
Further, described device further includes the host computer communicated by network with controller.
Further, the controller is a RTU.
The present invention also provides a kind of methods for carrying out RTU starting fatigue test using described device, including are held by controller
Capable following steps:
Step 1, electronic switch controling end is output control signals to, electronic switch is connected；
Step 2, the output signal of a DO of tested RTU is acquired in real time, and judges whether starting succeeds；
Step 3, electronic switch controling end is output control signals to, electronic switch is disconnected；
Step 4, judge whether the number of starts reaches setting number, if not reaching setting number, delay a period of time
After go to step 1；If reaching setting number, off-test.
Further, the step 2 specifically includes:
Step 2.1, a DO output signal of tested RTU is acquired in real time；
Step 2.2, if acquisition signal is low level always within the set time, it is believed that starting failure goes to step 3；
Step 2.3, if high level occurs in acquisition signal within the set time, judge whether the high level is interference letter
Number, if it is interference signal, go to step 2.1；If not interference signal, it is believed that start successfully, go to step 3.
Further, the setting time is 3 minutes.
Further, the step 2.3 judge acquire signal occur high level whether be interference signal method packet
It includes:
It is primary every acquisition in 1 second after high level occurs in acquisition signal, if the signal continuously acquired three times is high level,
Then the high level is not interference signal；Otherwise, the high level is interference signal.
Further, the step 4 sets number as 5000 times.
Further, the method also includes: after the test, the maximum for calculating tested RTU continuously successfully starts up number
With starting success rate.
Further, the method also includes: continuously successfully start up number and starting success rate carries out to maximum respectively
Marking, and summation is weighted to this two marking.
Compared with prior art, the invention has the following advantages:
The present invention is tested RTU's by tested RTU is arranged, controls tested RTU on/off electronic switch and controller
One-bit digital amount output port DO is connected with the one-bit digital amount input port DI of controller, the one-bit digital amount output of controller
Port DO is connected with the control terminal of electronic switch, and electronic switch is connected in controller output control signal, acquires tested RTU in real time
A DO output signal, and judge whether starting succeeds, output control signal disconnects electronic switch, and repeated priming is tested
RTU, the number until reaching setting can be automatically performed RTU starting fatigue test.Present invention firstly provides RTU starting is tired
Labor test method, and devise experimental rig can be automatically performed RTU starting fatigue test using described device, and traditional
Fatigue test is compared, and test period is substantially reduced, convenient for quickly understanding the starting performance of product.The test data of acquisition can
Research for RTU life cycle provides strong support.
Detailed description of the invention
Fig. 1 is the composition block diagram that a kind of RTU of the embodiment of the present invention starts fatigue experimental device.
In figure: 1- controller, 2- are tested RTU, 3- electronic switch, 4- host computer.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
A kind of composition block diagram of RTU starting fatigue experimental device of the embodiment of the present invention is as shown in Figure 1, described device includes:
Tested RTU2 controls the electronic switch 3 of tested RTU2 on/off, controller 1.The one-bit digital amount output port of tested RTU2
DO is connected with the one-bit digital amount input port DI of controller 1, the one-bit digital amount output port DO and electronic switch of controller 1
3 control terminal is connected.
In the present embodiment, described device is mainly made of tested RTU2, electronic switch 3 and controller 1.Controller 1 is
The control of described device and data processing centre are generally made of microprocessor and data storage etc..The one digit number of controller 1
Word amount input port DI is connected with the one-bit digital amount output port DO of tested RTU2, for acquiring a DO of tested RTU2
Output signal.When RTU normally starts, its any one DO can export stable high level signal.Principle accordingly, controller
1 may determine that whether the starting of tested RTU2 succeeds according to signal waveform collected.RTU starts fatigue test and needs repeatedly weight
It is multiple to start tested RTU2, for this purpose, a DO of controller 1 is connected with the control terminal of electronic switch 3.The electronic switch 3 is gone here and there
It is associated in the current supply circuit of tested RTU2, controller 1 controls the on-off of electronic switch 3, i.e. control quilt by output low and high level
The on-off of RTU2 power supply is surveyed, to realize the starting repeatedly and closing of tested RTU2.Electronic switch 3 can be selected high-power
Pipe, can also select relay.Select certain when electronic switch 3 it is noted that its rated current will be significantly greater than opening for tested RTU2
Streaming current.
As a kind of alternative embodiment, described device further includes the host computer 4 communicated by network with controller 1.
In the present embodiment, for the ease of in remote monitoring center monitoring test situation, being provided through network and control
The host computer 4 positioned at remote monitoring center that device 1 communicates.Host computer 4 uses MODBUS/TCP protocol access controller 1, obtains
Test result data.
As a kind of alternative embodiment, the controller 1 is a RTU.
In the present embodiment, in order to exempt the trouble for designing controller 1, using existing RTU as controller 1, even
The RTU identical with tested RTU2 of function admirable can be used.
A kind of method for carrying out RTU starting fatigue test using described device of the embodiment of the present invention, including held by controller 1
Capable following steps:
S101 outputs control signals to 3 control terminal of electronic switch, and electronic switch 3 is connected；
In this step, the DO output control signal that controller 1 is connected by it with 3 control terminal of electronic switch, such as high electricity
Electronic switch 3 is connected in ordinary mail number, to make tested RTU2 power-up starting.
S102, acquires the output signal of a DO of tested RTU2 in real time, and judges whether starting succeeds；
This step is mainly the DO output signal for passing through real-time monitoring and being tested RTU2, detects whether tested RTU2 successfully opens
It is dynamic.A DO of the DI and tested RTU2 of controller 1 are connected, and controller 1 is tested by the level acquisition for reading the DI
The DO output signal of RTU2.After normally starting due to RTU, any one DO exports stable high level signal, accordingly may be used
To judge whether the starting of tested RTU2 succeeds.
S103 outputs control signals to 3 control terminal of electronic switch, disconnects electronic switch 3；
This step is after tested RTU2 is powered on start completion, and controller 1 disconnects electronic switch by output control signal
3, make tested RTU2 power-off, prepares for starting next time.
S104, judges whether the number of starts reaches setting number, if not reaching setting number, after postponing a period of time
Turn S101；If reaching setting number, off-test.
In this step, judge whether test terminates by comparing the number of starts and the size of setting number, if starting
Number has been more than setting number, illustrates off-test；Otherwise, illustrate that test does not complete, turn S101 progress after postponing a period of time
Start next time.The purpose of delay a period of time is to there is the energy-storage travelling wave tube (such as capacitor) in tested RTU2 after a loss of power
Time enough electric discharge, in order to avoid influence normal starting next time.Delay time is typically no less than 10 seconds.
In the present embodiment, RTU starting fatigue test can be automatically performed using described device.Due to a subnormal starting
The time needed is very short, and general only 1 minute or so, and also the interval between starting can be estimated with very little according to subsequent twice
It calculates, completes RTU starting fatigue test, time-consuming five and half or so, compared with traditional fatigue test (time-consuming several months), significantly
Shorten test period.
As a kind of alternative embodiment, the S102 is specifically included:
S1021 acquires a DO output signal of tested RTU2 in real time；
S1022, if acquisition signal is low level always within the set time, it is believed that starting failure turns S103；
S1023 judges whether the high level is interference letter if high level occurs in acquisition signal within the set time
Number, if it is interference signal, turn S1021；If not interference signal, it is believed that start successfully, turn S103.
This gives a kind of specific methods of S102.It has been observed that any one DO is after RTU normally starts
Stable high level signal can be exported.The present embodiment is exactly according to this rule, and the DO according to the tested RTU2 acquired in real time is defeated
Whether signal is a stable high level signal out, judges whether starting is normal.Under normal circumstances, it needs to postpone after RTU power-up
For a period of time its DO just start export high level signal therefore need to set a time threshold, i.e. this reality when judging
Setting time described in example is applied, the setting time should be greater than lag at the time of DO starts to export high level under normal circumstances
It is powered on the time at moment.If DO output signal is low level always within the set time, it is taken as starting failure；If
There is high level in DO output signal in setting time, can not be considered as starting successfully accordingly, also to continue to judge the high level
Whether stable high level, or perhaps be not due to interference signal cause DO export high level.Because of increasingly severe electricity
Magnetic environment is easy to generate various electromagnetic interference signals, after these interference signals are superimposed upon DO output signal, DO can be made to export
There is high level in signal.If being judged that the high level is not interference signal, just think to start successfully.It can be believed according to interference
Number the characteristics of take corresponding judgment method, if interference signal is mostly mixed and disorderly narrow pulse signal, interfere caused by high level one
As the duration it is very short, can decide whether accordingly for interfere caused by high level.
As a kind of alternative embodiment, the setting time is 3 minutes.
This gives an empirical values of setting time, i.e. setting time is 3 minutes.Practice have shown that positive reason
The time at lag power-up moment is generally 1 minute or so at the time of DO starts to export high level under condition, few more than 2 minutes
's.In order to safe, it is 3 minutes that the present embodiment, which chooses setting time, just 3 minutes DO start to export stable high level letter after power-up
Number probability be almost 0.The present embodiment is merely given as the empirical value of a setting time as reference, does not deny and repels it
Its feasible value, such as 2.5 minutes, 3.2 minutes etc..
As a kind of alternative embodiment, the S1023 judges to acquire whether the high level that signal occurs is interference signal
Method includes:
It is primary every acquisition in 1 second after high level occurs in acquisition signal, if the signal continuously acquired three times is high level,
Then the high level is not interference signal；Otherwise, the high level is interference signal.
This gives judge acquisition high level signal whether be interference signal method.It has been observed that interference letter
Number duration is generally all very short, and the pulse width of many interference signals is nanosecond, and the present embodiment is namely based on interference signal
This very short rule of duration distinguishes normal high level signal and interference signal.Specific method is: between 1 second time
Three times every continuous acquisition, if being three times high level, it is believed that the width of this high level is at least 3 seconds, and interference signal
Pulse width be 3 seconds probability be almost 0.And the probability for continuously collecting interference signal three times is also extremely low.Therefore, such as
Fruit is continuously high level three times, it is believed that the DO output of tested RTU2 is stable high level signal, this time starting at
Function.If only collecting high level once or twice, it is taken as interference signal.There are many method for judging interference, even if complete
Also there are many different choosing methods at exactly the same method acquisition time interval, therefore the present embodiment is also merely given as one kind specifically
Implementation method, do not repel other feasible methods.
As a kind of alternative embodiment, the S104's sets number as 5000 times.
This gives complete a RTU starting fatigue test to need number to be started.According to aforementioned, RTU's
The maximum number that continuously successfully starts up can reach 3000 or more, and the number of starts is more than to start to occur after maximum continuously successfully starts up number
Starting failure phenomenon.In order to reserve certain nargin, the setting number of the present embodiment is taken 5000 times.It is well known that fatigue test consumes
Shi Ju great, the time of some need some months.In order to compare, below rough estimate once the present embodiment completes RTU starting fatigue
Test the time needed.According to aforementioned, it is 1 minute or so that RTU, which normally starts the time, in addition judging whether it is 3 seconds of interference and putting
10 seconds electric time, it is 73 seconds or so time-consuming to start primary test when starting successfully.If starting failure, needs to wait 3 minutes, add
10 seconds upper discharge times, the primary test of starting is 190 seconds or so time-consuming when starting fails.By 5000 startings, 4000 successes 1000
It is secondary unsuccessfully to calculate, it completes primary test and needs 5.5 days or so.Therefore, compared with classic fatigue test, test can be greatly shortened
Time.
As a kind of alternative embodiment, the method also includes: after the test, calculate tested RTU2 it is maximum continuously at
The function number of starts and starting success rate.
The present embodiment be it is for statistical analysis to test result, the maximum by calculating tested RTU2 continuously successfully starts up time
Number and starting success rate, assess the starting performance or life cycle of tested RTU2.
As a kind of alternative embodiment, the method also includes: respectively to it is maximum continuously successfully start up number and starting at
Power is given a mark, and is weighted summation to this two marking.
The present embodiment is to refer on the basis of a upper embodiment to two for being able to reflect tested RTU2 starting performance superiority and inferiority
Mark is given a mark respectively, and provides a comprehensive score by weighted sum.Compared with can be convenient according to the number of comprehensive score
Compared with the starting performance or life cycle of similar product.
It is above-mentioned that only several specific embodiments in the present invention are illustrated, but can not be as protection model of the invention
Enclose, it is all according to the present invention in the equivalent change or modification made of design spirit or equal proportion zoom in or out, should all
Think to fall into protection scope of the present invention.
Claims (10)
1. a kind of RTU starts fatigue experimental device characterized by comprising tested RTU controls the electricity of tested RTU on/off
Sub switch, controller；The one-bit digital amount input port DI phase of the one-bit digital amount output port DO and controller of tested RTU
Even, the one-bit digital amount output port DO of controller is connected with the control terminal of electronic switch.
2. RTU according to claim 1 starts fatigue experimental device, which is characterized in that described device further includes passing through net
The host computer that network is communicated with controller.
3. RTU according to claim 1 or 2 starts fatigue experimental device, which is characterized in that the controller is a RTU.
4. a kind of method for carrying out RTU starting fatigue test using claim 1 described device, which is characterized in that including by controlling
The following steps that device processed executes:
Step 1, electronic switch controling end is output control signals to, electronic switch is connected；
Step 2, the output signal of a DO of tested RTU is acquired in real time, and judges whether starting succeeds；
Step 3, electronic switch controling end is output control signals to, electronic switch is disconnected；
Step 4, judge whether the number of starts reaches setting number, if not reaching setting number, turn after postponing a period of time
Step 1；If reaching setting number, off-test.
5. according to the method described in claim 4, it is characterized in that, the step 2 specifically includes:
Step 2.1, a DO output signal of tested RTU is acquired in real time；
Step 2.2, if acquisition signal is low level always within the set time, it is believed that starting failure goes to step 3；
Step 2.3, if high level occurs in acquisition signal within the set time, judge whether the high level is interference signal,
If it is interference signal, 2.1 are gone to step；If not interference signal, it is believed that start successfully, go to step 3.
6. according to the method described in claim 5, it is characterized in that, the setting time is 3 minutes.
7. according to the method described in claim 5, it is characterized in that, the high level that the step 2.3 judgement acquisition signal occurs
It whether is that the method for interference signal includes: after high level occurs in acquisition signal, it is primary every acquisition in 1 second, if continuously acquiring three times
Signal be high level, then the high level is not interference signal；Otherwise, the high level is interference signal.
8. according to the method described in claim 4, it is characterized in that, the step 4 sets number as 5000 times.
9. according to method described in claim 4~8 any one, which is characterized in that the method also includes: off-test
Afterwards, the maximum for calculating tested RTU continuously successfully starts up number and starting success rate.
10. according to the method described in claim 9, it is characterized in that, the method also includes: respectively to maximum continuously successfully open
Dynamic number and starting success rate are given a mark, and are weighted summation to this two marking.
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