CN108845600A - A kind of precision seawater corrosion fatigue experimental bench automatic control system and method - Google Patents
A kind of precision seawater corrosion fatigue experimental bench automatic control system and method Download PDFInfo
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- CN108845600A CN108845600A CN201810348339.9A CN201810348339A CN108845600A CN 108845600 A CN108845600 A CN 108845600A CN 201810348339 A CN201810348339 A CN 201810348339A CN 108845600 A CN108845600 A CN 108845600A
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Abstract
The invention discloses a kind of accurate seawater corrosion fatigue experimental bench automatic control system and methods, are related to automation field, which includes：Main control module, parameter acquisition module and parameter adjustment module, main control module is separately connected parameter acquisition module and parameter adjustment module, parameter acquisition module is arranged in simulated seawater, for acquiring the seawater parameter of simulated seawater and being sent to main control module, parameter adjustment module is connected to simulated seawater and/or is arranged in simulated seawater, main control module adjusts the seawater parameter of this type of simulated seawater according to collected seawater state modulator parameter adjustment module, the application can carry out automatically controlling the seawater parameter in seawater corrosion fatigue experiment, more accurate simulated seawater environment.
Description
Technical field
The present invention relates to automation field, especially a kind of accurate seawater corrosion fatigue experimental bench automatic control system and
Method.
Background technique
Factor relevant to iron rot mainly includes chloride ion (Cl-) concentration, dissolved oxygen concentration, pH value in seawater
(Potential of Hydrogen, hydrogen ionexponent), temperature and water velocity.Wherein, the corrosion of iron in the seawater
Based on electrochemical reaction, the form of expression is that ferro element (Fe) is chemically reacted with chloride ion, dissolves it constantly；Work as sea
When higher containing oxygen capacity in water, ferro element and oxygen generation oxidation reaction are more violent；PH value concentration is lower, to the corrosivity of iron
It is bigger；When temperature is raised, the electrochemical reaction and oxidation reaction of iron can also aggravate；And the speed of water flow is to the corrosion impact of iron
Also very big, when water velocity is more than critical speed, the corrosion rate of iron is obviously accelerated.
The above parameters in experimental bench are matched at present, are only adjusted when testing and starting, but in seawater
The testing fatigue general test period of irony test specimen is longer, in order to reach scheduled times of fatigue, generally requires to expend one month
Or the more long time, over time, the Cl- concentration in experimental bench water tank can constantly be reduced with electrochemical reaction,
Dissolved oxygen concentration, pH value, temperature and water velocity also can gradually change.Current way is at regular intervals to it
It is manually monitored, is then adjusted according to the value of parameter current.This mode is primarily present following drawback：(1) this is completed
Work is main manually to be carried out, and is modified at regular intervals to parameter, cannot preferable simulated seawater environment, and
These parameters in practical seawater are that opposite holding is stable in a long time；(2) sample frequency of artificial acquisition parameter is not
Can be too big, it is usually that 6 hour monitoring are primary according to normal scientific research, effectively real-time Parameters variation feelings cannot be obtained
Condition；(3) current experimental bench only obtains fatigue experiment as a result, without being monitored to process, can not be informed in tired real
The situation of change of test specimen during testing.
Summary of the invention
The present inventor regarding to the issue above and technical need, proposes a kind of accurate seawater corrosion fatigue experimental bench and controls automatically
System and method processed can carry out automatically controlling the seawater parameter in seawater corrosion fatigue experiment, more accurate simulated seawater
Environment.
Technical scheme is as follows：
A kind of precision seawater corrosion fatigue experimental bench automatic control system includes simulated seawater in experimental bench, tests test specimen
It is arranged in simulated seawater and carries out seawater corrosion fatigue experiment, which includes：Main control module, parameter acquisition module and parameter tune
Mould preparation block；
Main control module includes micro-control unit MCU, signal conversion unit and storage unit, and signal conversion unit is separately connected
MCU and storage unit, signal conversion unit Connecting quantity obtain module, and MCU Connecting quantity adjusts module；Parameter acquisition module is set
It sets in simulated seawater, for acquiring the seawater parameter of simulated seawater and being sent to main control module, seawater parameter is simulated seawater
The parameter of the middle seawater corrosion fatigue experiment for influencing experiment test specimen；Parameter adjustment module is connected to and/or is arranged with simulated seawater
In simulated seawater and in the seawater parameter of adjustment simulated seawater, the type of the seawater parameter of parameter adjustment module adjustment is obtained with parameter
The type of the seawater parameter of modulus block acquisition is identical, and main control module in the collected seawater parameter of parameter acquisition module for exceeding
When preset parameter range, according to the seawater parameter of preset strategy control parameter adjustment module adjustment simulated seawater.
Its further technical solution is that system further includes thermal imaging system, and thermal imaging system connects the signal in main control module
Converting unit, thermal imaging system is towards experiment test specimen and for acquiring infrared chart of the experiment test specimen in seawater corrosion fatigue experiment
Picture.
Its further technical solution is, seawater parameter include the chlorine ion concentration of simulated seawater, temperature, liquid level,
At least one of water velocity, hydrogen ionexponent pH value and dissolved oxygen concentration, then：
It includes chloride ion adjustment unit that parameter acquisition module, which includes chlorine ion concentration sensor, parameter adjustment module, chlorine from
Sub- adjustment unit includes distilled water adder and sodium chloride solution adder, distilled water adder and sodium chloride solution adder with
The chloride ion that simulated seawater connection, parameter acquisition module and parameter adjustment module are respectively used to acquire and adjust simulated seawater is dense
Degree；
And/or it includes temperature adjustment unit, temperature tune that parameter acquisition module, which includes temperature sensor, parameter adjustment module,
Whole unit includes heater and refrigerator, and heater and refrigerator are arranged in simulated seawater, parameter acquisition module and parameter tune
Mould preparation block is respectively used to acquire and adjust the temperature of simulated seawater；
And/or it includes liquid level adjustment unit, liquid level tune that parameter acquisition module, which includes liquid level sensor, parameter adjustment module,
Whole unit includes simulated seawater adder and solution discharge device, simulated seawater adder and solution discharge device and simulated seawater
Connection, parameter acquisition module and parameter adjustment module are respectively used to acquire and adjust the liquid level of simulated seawater；
And/or it includes flow velocity adjustment unit that parameter acquisition module, which includes current meter, parameter adjustment module, flow velocity adjustment is single
Member includes Electric Machine at Pumping Station, and Electric Machine at Pumping Station is arranged in simulated seawater, and parameter acquisition module and parameter adjustment module are respectively used to adopt
The water velocity of collection and adjustment simulated seawater；
And/or it includes PH adjustment unit, PH adjustment unit that parameter acquisition module, which includes PH sensor, parameter adjustment module,
Including acid solution adder and alkaline solution adder, acid solution adder and alkaline solution adder and simulated seawater connect
Logical, parameter acquisition module and parameter adjustment module are respectively used to acquire and adjust the pH value of simulated seawater；
And/or it includes dissolved oxygen adjustment unit that parameter acquisition module, which includes dissolved oxygen sensor, parameter adjustment module, it is molten
Solving oxygen adjustment unit includes oxygen-eliminating device and oxygen increasing pump, and oxygen-eliminating device and oxygen increasing pump are connected to simulated seawater, parameter acquisition module and ginseng
Number adjustment module is respectively used to acquire and adjust the dissolved oxygen concentration of simulated seawater.
A kind of precision seawater corrosion fatigue experimental bench autocontrol method, method are applied in above system, this method packet
It includes：
During experiment test specimen carries out seawater corrosion fatigue experiment in simulated seawater, adopted by parameter acquisition module
Collect the seawater parameter of simulated seawater, seawater parameter is that the ginseng of the seawater corrosion fatigue experiment of experiment test specimen is influenced in simulated seawater
Number；
Collected seawater parameter is detected whether in preset parameter range；
When detecting seawater parameter beyond preset parameter range, mould is adjusted according to preset strategy control parameter adjustment module
The seawater parameter of quasi- seawater, the type of the seawater parameter of parameter adjustment module adjustment and the seawater parameter of parameter acquisition module acquisition
Type it is identical.
Its further technical solution is that above system includes thermal imaging system, then this method further includes：
During experiment test specimen carries out seawater corrosion fatigue experiment in simulated seawater, simultaneously by thermal imaging system acquisition
The thermal-induced imagery of display experiment test specimen.
Its further technical solution is, when detecting seawater parameter beyond preset parameter range, according to preset strategy
Control parameter adjusts the seawater parameter of module adjustment simulated seawater, including：
When detecting seawater parameter beyond preset parameter range, the detecting distance last time is according to preset strategy control parameter
Whether the duration of the seawater parameter of adjustment module adjustment simulated seawater reaches preset duration；
If reaching preset duration, according to the seawater parameter of preset strategy control parameter adjustment module adjustment simulated seawater.
Its further technical solution is that the seawater parameter of parameter acquisition module acquisition includes that the chloride ion of simulated seawater is dense
At least one of degree, temperature, liquid level, water velocity, hydrogen ionexponent pH value and dissolved oxygen concentration.
Its further technical solution is, when detecting seawater parameter beyond preset parameter range, according to preset strategy
Control parameter adjusts the seawater parameter of module adjustment simulated seawater, including：
When the chlorine ion concentration for detecting simulated seawater is higher than default chlorine ion concentration range, distilled water adder is controlled
The distilled water of the first predetermined volumes is added into simulated seawater；When the chlorine ion concentration for detecting simulated seawater be lower than default chlorine from
When sub- concentration range, control sodium chloride solution adder adds the sodium chloride solution of the second predetermined volumes into simulated seawater；
And/or when the temperature for detecting simulated seawater is higher than preset temperature range, control refrigerator starts and to simulation
Seawater the first scheduled duration of cooling；When detecting the temperature of simulated seawater lower than preset temperature range, heater starting is controlled
And the second scheduled duration is heated to simulated seawater；
And/or when the liquid level for detecting simulated seawater is higher than default liquid level range, control solution discharge device from
The simulated seawater of third predetermined volumes is discharged in simulated seawater；When the liquid level for detecting simulated seawater is lower than default liquid level model
When enclosing, control simulated seawater adder adds the simulated seawater of the 4th predetermined volumes into simulated seawater；
And/or when the water velocity for detecting simulated seawater is higher than pre-set velocity range, control Electric Machine at Pumping Station reduces by the
One desired speed；When detecting the water velocity of simulated seawater lower than pre-set velocity range, control Electric Machine at Pumping Station improves second
Desired speed；
And/or when the pH value for detecting simulated seawater is higher than default pH range, acid solution adder is controlled to mould
The acid solution of the 5th predetermined volumes is added in quasi- seawater；When the pH value for detecting simulated seawater is lower than default pH range,
Control alkaline solution adder adds the alkaline solution of the 6th predetermined volumes into simulated seawater；
And/or when the dissolved oxygen concentration for detecting simulated seawater is higher than default dissolved oxygen concentration range, control oxygen-eliminating device
Start and the third scheduled duration that works；When the dissolved oxygen concentration for detecting simulated seawater is lower than default dissolved oxygen concentration range,
Control oxygenation pump startup and the 4th scheduled duration that works.
The method have the benefit that：
The application provides a kind of accurate seawater aiming at the problem that current fatigue corrosion experimental bench cannot intelligently control parameter
Corrosion fatigue experimental bench automatic control system and method obtain simulated seawater by the way that various kinds of sensors is arranged in simulated seawater
Seawater parameter, decision and execution are carried out by MCU, and automatically control parameter adjustment module and adjust accordingly to seawater parameter,
The automatic control to seawater parameter can be realized with the control problem of environmental parameter in the current seawater corrosion fatigue experiment of effective solution
System, the environment of more accurate simulated seawater.When in addition being automatically controlled by machine, sample frequency can be adjusted on demand, real-time compared with
It is good.On the other hand, it is provided with the thermal imaging system towards experiment test specimen in the application, it is tired in seawater corrosion that experiment test specimen can be acquired
Thermal-induced imagery in labor experiment, therefore not only available fatigue experiment exists as a result, can also easily understand experiment test specimen
Situation of change during corrosion fatigue test.
Detailed description of the invention
Fig. 1 is the system construction drawing of accurate seawater corrosion fatigue experimental bench automatic control system disclosed in the present application.
Fig. 2 is the flow chart of accurate seawater corrosion fatigue experimental bench autocontrol method disclosed in the present application.
Fig. 3 is another flow chart of accurate seawater corrosion fatigue experimental bench autocontrol method disclosed in the present application.
Specific embodiment
The following further describes the specific embodiments of the present invention with reference to the drawings.
It include simulation in the experimental bench the invention discloses a kind of accurate seawater corrosion fatigue experimental bench automatic control system
Seawater, experiment test specimen, which is arranged in simulated seawater, carries out seawater corrosion fatigue experiment, and experiment test specimen uses the metal material of iron etc
Matter is made, which may be implemented the automatic control to the seawater parameter of simulated seawater, referring to FIG. 1, the system includes master control
Module, parameter acquisition module and parameter adjustment module, main control module are separately connected parameter acquisition module and parameter adjustment module.
Parameter acquisition module includes various kinds of sensors, and the seawater in simulated seawater and for acquiring simulated seawater is arranged in
Parameter, the seawater parameter in the application refer to the parameter for the seawater corrosion fatigue experiment that experiment test specimen is influenced in simulated seawater,
Including but not limited in the chlorine ion concentration of simulated seawater, temperature, liquid level, water velocity, pH value and dissolved oxygen concentration
At least one, then it is corresponding, the parameter acquisition module in the application include but is not limited to chlorine ion concentration sensor, temperature pass
At least one of sensor, liquid level sensor, current meter, PH sensor and dissolved oxygen sensor, wherein chlorine ion concentration senses
Device is used to acquire the chlorine ion concentration in simulated seawater, and temperature sensor is used to acquire the temperature of simulated seawater, and so on.
Main control module includes that MCU (Microcontroller Unit, micro-control unit), signal conversion unit and storage are single
Member, signal conversion unit can be implemented as A/D converter (analog-digital converter), and storage unit can be implemented as disk, and signal turns
It changes unit and is separately connected MCU and storage unit.Signal conversion unit Connecting quantity obtains module, and parameter acquisition module is by all kinds of biographies
The collected seawater parameter of sensor is sent to the signal conversion unit in main control module, and collected sensor is analog quantity letter
Number, signal conversion unit for the analog signals received are converted into digital quantity signal and be sent to MCU carry out decision and
It executes, the digital quantity signal that conversion obtains also is sent to storage unit and stored by synchronous signal converting unit, convenient to reality
The access of seawater parameter during testing.
MCU connection and control parameter in main control module adjust module, and parameter adjustment module includes all kinds of for seawater
The set-up mode of the device that parameter is adjusted, different devices is different, it is generally the case that parameter adjustment module and simulated seawater
Connection and/or setting are in simulated seawater, so as to adjust the seawater parameter of simulated seawater.The seawater ginseng of parameter adjustment module adjustment
Several types is identical as the type of seawater parameter that parameter acquisition module acquires, therefore device and parameter in parameter adjustment module
Obtain module in sensor be correspondingly arranged, corresponding to all kinds of seawater parameters in the application, mainly include it is several under it is several
Corresponding situation：
One, it includes chloride ion adjustment unit, chlorine that parameter acquisition module, which includes chlorine ion concentration sensor, parameter adjustment module,
Ion adjustment unit includes distilled water adder and sodium chloride solution adder, distilled water adder and sodium chloride solution adder
Be connected to simulated seawater, include preparing the sodium chloride solution of concentration in advance in sodium chloride solution adder, parameter acquisition module and
Parameter adjustment module is respectively used to acquire and adjust the chlorine ion concentration of simulated seawater.
Two, it includes temperature adjustment unit that parameter acquisition module, which includes temperature sensor, parameter adjustment module, and temperature adjustment is single
Member includes heater and refrigerator, and heater and refrigerator are arranged in simulated seawater, and parameter acquisition module and parameter adjust mould
Block is respectively used to acquire and adjust the temperature of simulated seawater.
Three, it includes liquid level adjustment unit that parameter acquisition module, which includes liquid level sensor, parameter adjustment module, and liquid level adjustment is single
Member includes simulated seawater adder and solution discharge device, and simulated seawater adder and solution discharge device and simulated seawater connect
It is logical, it include simulated seawater identical with the simulated seawater in experimental bench, parameter acquisition module and parameter in simulated seawater adder
Adjustment module is respectively used to acquire and adjust the liquid level of simulated seawater.
Four, it includes flow velocity adjustment unit, flow velocity adjustment unit packet that parameter acquisition module, which includes current meter, parameter adjustment module,
Include Electric Machine at Pumping Station, Electric Machine at Pumping Station is arranged in simulated seawater, parameter acquisition module and parameter adjustment module be respectively used to acquisition and
Adjust the water velocity of simulated seawater.
Five, it includes PH adjustment unit that parameter acquisition module, which includes PH sensor, parameter adjustment module, and PH adjustment unit includes
Acid solution adder and alkaline solution adder, acid solution adder and alkaline solution adder are connected to simulated seawater,
It include preparing the acid solution of concentration, such as HCl (hydrogen chloride) solution, alkaline solution adder in advance in acid solution adder
In include preparing the alkaline solution of concentration, such as NaCHO in advance2(sodium formate) solution, parameter acquisition module and parameter adjust mould
Block is respectively used to acquire and adjust the pH value of simulated seawater.
Six, it includes dissolved oxygen adjustment unit, dissolved oxygen that parameter acquisition module, which includes dissolved oxygen sensor, parameter adjustment module,
Adjustment unit includes oxygen-eliminating device and oxygen increasing pump, and oxygen-eliminating device and oxygen increasing pump are connected to simulated seawater, parameter acquisition module and parameter tune
Mould preparation block is respectively used to acquire and adjust the dissolved oxygen concentration of simulated seawater.
The particular content of parameter acquisition module and parameter adjustment module in the system include in above-mentioned six kinds of situations extremely
Few one kind, in actual implementation, parameter acquisition module include above-mentioned six kinds of sensors simultaneously, and parameter adjustment module also includes upper simultaneously
Six kinds of adjustment modules are stated, then whole system can be to chlorine ion concentration, temperature, liquid level, water velocity, pH value and dissolution
Oxygen concentration is all acquired and adjusts.
Optionally, for observation experiment test specimen fatigue properties situation of change during the experiment, the system further include heat at
As instrument, thermal imaging system connects the signal conversion unit in main control module, and thermal imaging system is towards experiment test specimen and for acquiring experiment
Thermal-induced imagery of the test specimen in seawater corrosion fatigue experiment, the temperature for testing the fatigue fraction of test specimen is higher than rest part, because
This utilizes the thermal-induced imagery for more easily understanding situation of change of experiment test specimen during corrosion fatigue test.
Precision seawater corrosion fatigue experimental bench automatic control system disclosed in corresponding diagram 1, the application is also directed to the system
The course of work discloses a kind of accurate seawater corrosion fatigue experimental bench autocontrol method, please refer to Fig. 2 shows flow chart, should
Method includes：
Step 2-1：Experiment test specimen is arranged in simulated seawater and carries out seawater corrosion fatigue experiment, during the experiment,
Main control module acquires the seawater parameter of simulated seawater by parameter acquisition module and is stored in a storage unit seawater parameter, together
When acquired by thermal imaging system and show experiment test specimen thermal-induced imagery, main control module be usually determined according to preset frequency
Phase acquisition, the meaning of seawater parameter is as described above, preset frequency can be by user's customized setting in advance.
Step 2-2：Main control module detects collected seawater parameter whether in preset parameter range, preset parameter range
Customized setting is all usually carried out by user in advance.
Step 2-3：If detecting seawater parameter in pre-set preset parameter range, continue waiting for carrying out next
Secondary detection.
Step 2-4：If detecting seawater parameter beyond preset parameter range, the detecting distance last time is according to preset strategy
Whether the duration of the seawater parameter of control parameter adjustment module adjustment simulated seawater reaches preset duration, due to entire experimental bench
Simulated seawater is in recurrent state, and chlorine ion concentration, pH value and dissolved oxygen concentration in above-mentioned seawater parameter, usually logical
It crosses and adds solution into simulated seawater to be adjusted, then in order to which the solution for enabling the last time to add sufficiently is diffused into entirely
In the simulated seawater of experimental bench, the time interval of preset duration is set herein；Likewise, the temperature in seawater parameter is usually logical
It crosses heating and cools down to realize, then in order to make the simulated seawater heat exchange of entire experimental bench to balancing, it is also desirable to which setting is default
The time interval of duration；For in above-mentioned seawater parameter liquid level and water velocity for, the step for also can be omitted.
In addition, being directed to the type of different seawater parameters, preset strategy and preset duration can be different, preset strategy and preset duration
Usually it is customized by the user.
Step 2-5：If reaching preset duration, according to the sea of preset strategy control parameter adjustment module adjustment simulated seawater
Water parameter, the type phase for the seawater parameter that the type of the seawater parameter of parameter adjustment module adjustment is acquired with parameter acquisition module
Together.
Step 2-6：If not up to preset duration, continue waiting for being detected next time, between the time of preset duration
Every interior, collected seawater parameter may be the parameter of simulated seawater part and can not really reflect the whole water of simulated seawater
Flat seawater parameter, therefore even if seawater parameter is not also adjusted immediately not in preset parameter range, but wait next
Secondary detection.
Different according to the type of collected seawater parameter, the concrete operations of above-mentioned steps 2-2 to 2-6 are different, the application
Can detecte chlorine ion concentration, temperature, liquid level, water velocity, pH value and dissolved oxygen concentration with system shown in FIG. 1 is
This method is specifically described in example, please refers to the flow chart shown in Fig. 3, process is：
Step 3-1：The chlorine ion concentration of simulated seawater is detected whether within the scope of default chlorine ion concentration.
Step 3-2：If chlorine ion concentration executes the following steps 3-5 within the scope of default chlorine ion concentration.
Step 3-3：If chlorine ion concentration is higher than default chlorine ion concentration range, the detecting distance last time adds distilled water
Duration whether reach 3 minutes, if full 3 minutes, control distilled water adder and add the first predetermined volumes into simulated seawater
Distilled water simultaneously executes the following steps 3-5, if less than 3 minutes, directly execution the following steps 3-5.
Step 3-4：If chlorine ion concentration is lower than chlorine ion concentration range, the detecting distance last time adds sodium chloride solution
Duration whether reach 3 minutes, if full 3 minutes, control sodium chloride solution adder and add the second pre- constant volume into simulated seawater
The sodium chloride solution of amount simultaneously executes the following steps 3-5, if less than 3 minutes, directly execution the following steps 3-5.
Step 3-5：The temperature of simulated seawater is detected whether in preset temperature range.
Step 3-6：If the temperature of simulated seawater in preset temperature range, executes the following steps 3-9.
Step 3-7：If the temperature of simulated seawater is higher than preset temperature range, whether the cooling of detecting distance last time expires 1
Minute, if full 1 minute, it controls refrigerator starting and cools down to simulated seawater and the first scheduled duration and execute the following steps 3-9,
If less than 1 minute, directly execution the following steps 3-9.
Step 3-8：If the temperature of simulated seawater is lower than preset temperature range, whether the heating of detecting distance last time expires 1
Minute, if 1 minute full, control heater starting and the second scheduled duration is heated to simulated seawater and executes the following steps 3-9,
If less than 1 minute, directly execution the following steps 3-9.
Step 3-9：The liquid level of simulated seawater is detected whether within the scope of default liquid level.
Step 3-10：If the liquid level of simulated seawater executes the following steps 3-13 within the scope of default liquid level.
Step 3-11：If the liquid level of simulated seawater is higher than default liquid level range, control solution discharge device from
The simulated seawater of third predetermined volumes is discharged in simulated seawater, and executes the following steps 3-13.
Step 3-12：If the liquid level of simulated seawater is lower than default liquid level range, simulated seawater adder is controlled
The simulated seawater of the 4th predetermined volumes is added into simulated seawater, and executes the following steps 3-13.
Step 3-13：The water velocity of simulated seawater is detected whether within the scope of pre-set velocity.
Step 3-14：If the water velocity of simulated seawater within the scope of pre-set velocity, executes the following steps 3-17.
Step 3-15：If the water velocity of simulated seawater is higher than pre-set velocity range, control Electric Machine at Pumping Station reduces by first
Desired speed, and execute the following steps 3-17.
Step 3-16：If the water velocity of simulated seawater is lower than pre-set velocity range, control Electric Machine at Pumping Station improves second
Desired speed, and execute the following steps 3-17.
Step 3-17：The pH value of simulated seawater is detected whether in default pH range.
Step 3-18：If the pH value of simulated seawater executes the following steps 3-21 in default pH range.
Step 3-19：If the pH value of simulated seawater is higher than default pH range, the addition of detecting distance last time is acid molten
Whether the duration of liquid reaches 3 minutes, if 3 minutes full, control acid solution adder and adds the 5th pre- constant volume into simulated seawater
The acid solution of amount simultaneously executes the following steps 3-21, if less than 3 minutes, directly execution the following steps 3-21.
Step 3-20：If the pH value of simulated seawater is lower than default pH range, detecting distance last time addition alkalinity
Whether the duration of solution reaches 3 minutes, if full 3 minutes, it controls alkaline solution adder and add the 6th into simulated seawater and make a reservation for
The alkaline solution of capacity simultaneously executes the following steps 3-21, if less than 3 minutes, directly execution the following steps 3-21.
Step 3-21：The dissolved oxygen concentration in simulated seawater is detected whether within the scope of default dissolved oxygen concentration.
Step 3-22：If the dissolved oxygen concentration of simulated seawater executes above-mentioned steps within the scope of default dissolved oxygen concentration
2-1 acquires seawater parameter again.
Step 3-23：If the dissolved oxygen concentration of simulated seawater, which is higher than, presets dissolved oxygen concentration range, one on detecting distance
Whether the duration of secondary starting oxygen-eliminating device reaches 2 minutes, if full 2 minutes, it controls oxygen-eliminating device and starts and the third scheduled duration that works, and
Execute above-mentioned steps 2-1；If less than 2 minutes, directly execution above-mentioned steps 2-1.
Step 3-24：If the dissolved oxygen concentration of simulated seawater, which is lower than, presets dissolved oxygen concentration range, one on detecting distance
Whether the duration of secondary starting oxygen increasing pump reaches 2 minutes, if 2 minutes full, controls oxygenation pump startup and the 4th scheduled duration that works, and
Execute above-mentioned steps 2-1；If less than 2 minutes, directly execution above-mentioned steps 2-1.
Above-described is only the preferred embodiment of the application, and present invention is not limited to the above embodiments.It is appreciated that this
The other improvements and change that field technical staff directly exports or associates without departing from the spirit and concept in the present invention
Change, is considered as being included within protection scope of the present invention.
Claims (8)
- It include simulated seawater, experiment examination in the experimental bench 1. a kind of precision seawater corrosion fatigue experimental bench automatic control system Part, which is arranged in the simulated seawater, carries out seawater corrosion fatigue experiment, which is characterized in that the system comprises：Main control module, Parameter acquisition module and parameter adjustment module；The main control module includes micro-control unit MCU, signal conversion unit and storage unit, the signal conversion unit difference MCU and the storage unit are connected, the signal conversion unit connects the parameter acquisition module, the MCU connection parameter tune Mould preparation block；The parameter acquisition module is arranged in the simulated seawater, for acquiring the seawater parameter of the simulated seawater simultaneously It is sent to the main control module, the seawater parameter is the seawater corrosion fatigue that the experiment test specimen is influenced in the simulated seawater The parameter of experiment；The parameter adjustment module is connected to the simulated seawater and/or is arranged in the simulated seawater and in tune The type of the seawater parameter of whole simulated seawater, the seawater parameter of the parameter adjustment module adjustment is adopted with the parameter acquisition module The type of the seawater parameter of collection is identical, and the main control module in the collected seawater parameter of the parameter acquisition module for exceeding When preset parameter range, the seawater parameter that the parameter adjustment module adjusts the simulated seawater is controlled according to preset strategy.
- 2. system according to claim 1, which is characterized in that the system also includes thermal imaging system, the thermal imaging system The signal conversion unit in the main control module is connected, the thermal imaging system is towards the experiment test specimen and for acquiring the reality Test thermal-induced imagery of the test specimen in seawater corrosion fatigue experiment.
- 3. system according to claim 1 or 2, which is characterized in that the seawater parameter includes the chlorine of the simulated seawater At least one of ion concentration, temperature, liquid level, water velocity, hydrogen ionexponent pH value and dissolved oxygen concentration, Then：It includes chloride ion adjustment unit that the parameter acquisition module, which includes chlorine ion concentration sensor, the parameter adjustment module, The chloride ion adjustment unit includes distilled water adder and sodium chloride solution adder, the distilled water adder and sodium chloride Solution adder is connected to the simulated seawater, and the parameter acquisition module and parameter adjustment module are respectively used to acquire and adjust The chlorine ion concentration of the simulated seawater；And/or it includes temperature adjustment unit, institute that the parameter acquisition module, which includes temperature sensor, the parameter adjustment module, Stating temperature adjustment unit includes heater and refrigerator, and the heater and refrigerator are arranged in the simulated seawater, described Parameter acquisition module and parameter adjustment module are respectively used to acquire and adjust the temperature of the simulated seawater；And/or it includes liquid level adjustment unit, institute that the parameter acquisition module, which includes liquid level sensor, the parameter adjustment module, Stating liquid level adjustment unit includes simulated seawater adder and solution discharge device, and the simulated seawater adder and solution discharge fill It sets and is connected to the simulated seawater, the parameter acquisition module and parameter adjustment module are respectively used to acquire and adjust the simulation The liquid level of seawater；And/or it includes flow velocity adjustment unit, the stream that the parameter acquisition module, which includes current meter, the parameter adjustment module, Fast adjustment unit includes Electric Machine at Pumping Station, and the Electric Machine at Pumping Station is arranged in the simulated seawater, the parameter acquisition module and ginseng Number adjustment module is respectively used to acquire and adjust the water velocity of the simulated seawater；And/or it includes PH adjustment unit, the PH that the parameter acquisition module, which includes PH sensor, the parameter adjustment module, Adjustment unit includes acid solution adder and alkaline solution adder, the acid solution adder and alkaline solution adder It is connected to the simulated seawater, the parameter acquisition module and parameter adjustment module are respectively used to acquire and adjust the simulation sea The pH value of water；And/or it includes that dissolved oxygen adjustment is single that the parameter acquisition module, which includes dissolved oxygen sensor, the parameter adjustment module, Member, the dissolved oxygen adjustment unit include oxygen-eliminating device and oxygen increasing pump, and the oxygen-eliminating device and oxygen increasing pump are connected to the simulated seawater, The parameter acquisition module and parameter adjustment module are respectively used to acquire and adjust the dissolved oxygen concentration of the simulated seawater.
- 4. a kind of precision seawater corrosion fatigue experimental bench autocontrol method, the method are used for such as any institute of claims 1 to 3 In the system stated, which is characterized in that the method includes：During the experiment test specimen carries out seawater corrosion fatigue experiment in the simulated seawater, obtained by the parameter Modulus block acquires the seawater parameter of the simulated seawater, and the seawater parameter is that the experiment test specimen is influenced in the simulated seawater Seawater corrosion fatigue experiment parameter；Collected seawater parameter is detected whether in preset parameter range；When detecting the seawater parameter beyond the preset parameter range, the parameter is controlled according to preset strategy and adjusts mould Block adjusts the seawater parameter of the simulated seawater, and the type of the seawater parameter of the parameter adjustment module adjustment is obtained with the parameter The type of the seawater parameter of modulus block acquisition is identical.
- 5. according to the method described in claim 4, it is characterized in that, then the method is also wrapped the system comprises thermal imaging system It includes：During the experiment test specimen carries out seawater corrosion fatigue experiment in the simulated seawater, pass through the thermal imaging Instrument acquires and shows the thermal-induced imagery of the experiment test specimen.
- 6. according to the method described in claim 4, it is characterized in that, described ought detect the seawater parameter beyond described default When parameter area, the seawater parameter that the parameter adjustment module adjusts the simulated seawater is controlled according to preset strategy, including：When detecting the seawater parameter beyond the preset parameter range, the detecting distance last time is according to the preset strategy Whether the duration for controlling the seawater parameter that the parameter adjustment module adjusts the simulated seawater reaches preset duration；If reaching the preset duration, the parameter adjustment module is controlled according to the preset strategy and adjusts the simulated seawater Seawater parameter.
- 7. according to any method of claim 4 to 6, which is characterized in that the seawater ginseng of the parameter acquisition module acquisition Number include the chlorine ion concentrations of the simulated seawater, temperature, liquid level, water velocity, hydrogen ionexponent pH value and At least one of dissolved oxygen concentration.
- 8. the method according to the description of claim 7 is characterized in that described ought detect the seawater parameter beyond described default When parameter area, the seawater parameter that the parameter adjustment module adjusts the simulated seawater is controlled according to preset strategy, including：When the chlorine ion concentration for detecting the simulated seawater is higher than default chlorine ion concentration range, controls the distilled water and add Device is added to add the distilled water of the first predetermined volumes into the simulated seawater；When the chlorine ion concentration for detecting the simulated seawater When lower than the default chlorine ion concentration range, controls the sodium chloride solution adder and add second into the simulated seawater The sodium chloride solution of predetermined volumes；And/or when the temperature for detecting the simulated seawater is higher than preset temperature range, refrigerator starting and right is controlled The first scheduled duration of the simulated seawater cooling；When the temperature for detecting the simulated seawater is lower than the preset temperature range When, it controls the heater starting and the second scheduled duration is heated to the simulated seawater；And/or when the liquid level for detecting the simulated seawater is higher than default liquid level range, the solution discharge dress is controlled Set the simulated seawater that third predetermined volumes are discharged from the simulated seawater；When the liquid level for detecting the simulated seawater is low When default liquid level range, the simulation that the simulated seawater adder adds the 4th predetermined volumes into the simulated seawater is controlled Seawater；And/or when the water velocity for detecting the simulated seawater is higher than pre-set velocity range, the Electric Machine at Pumping Station drop is controlled Low first desired speed；When detecting the water velocity of the simulated seawater lower than the pre-set velocity range, described in control Electric Machine at Pumping Station improves the second desired speed；And/or when the pH value for detecting the simulated seawater is higher than default pH range, control the acid solution adder The acid solution of the 5th predetermined volumes is added into the simulated seawater；Described in being lower than when the pH value for detecting the simulated seawater When default pH range, controls the alkaline solution adder and add the alkaline molten of the 6th predetermined volumes into the simulated seawater Liquid；And/or when the dissolved oxygen concentration for detecting the simulated seawater is higher than default dissolved oxygen concentration range, removed described in control Oxygen device starts and the third scheduled duration that works；When the dissolved oxygen concentration for detecting the simulated seawater is lower than the default dissolved oxygen When concentration range, the oxygenation pump startup is controlled and the 4th scheduled duration that works.
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