CN110319985A - A kind of detection system and detection method - Google Patents
A kind of detection system and detection method Download PDFInfo
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- CN110319985A CN110319985A CN201810274316.8A CN201810274316A CN110319985A CN 110319985 A CN110319985 A CN 110319985A CN 201810274316 A CN201810274316 A CN 201810274316A CN 110319985 A CN110319985 A CN 110319985A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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Abstract
The present invention provides a kind of detection system and detection methods, are related to technical field of vehicle.Wherein, vacuum evacuation device can be after switching, extract the gas in system under test (SUT), the vacuum values that the available vacuum transducer of singlechip controller detects, when vacuum values are less than preset threshold and no longer reduce, vacuum evacuation device is closed, and the vacuum values reduced less than preset threshold and no longer are determined as the first vacuum values；After the first preset duration, the vacuum values that vacuum transducer is detected are determined as the second vacuum values；Based on the first vacuum values and the second vacuum values, vacuum values difference and vacuum values rate of change are calculated, according to vacuum values difference and vacuum values rate of change, judges system under test (SUT) with the presence or absence of leakage.In this way, can reduce the vacuum values as caused by system attribute itself based on the mode that vacuum values difference and vacuum values rate of change are judged and go up on the influence of deterministic process bring, and then improve the accuracy rate of judgement.
Description
Technical field
The present invention relates to technical field of vehicle, in particular to a kind of detection system and detection method.
Background technique
With the continuous development of vehicle technology, the popularity of vehicle is higher and higher, in the assembling process of vehicle, often needs
Vehicular liquid is filled for the part system in vehicle, for example, brake fluid, power-assisted steering liquid are filled to the braking system of vehicle,
To air-conditioning system filling refrigerating fluid, etc..When being filled, to the leakproofness of loading system, filling operation is often determined
Whether can successfully carry out.Therefore, the problem of how detecting to loading system with the presence or absence of revealing, becoming people's extensive concern.
The prior art when detecting, usually rule of thumb manually sets a fixed threshold, then treats loading system
The vacuum pumping for carrying out a period of time, after vacuumizing terminates, if the vacuum values to loading system are solid not less than this
Determine threshold value, then it is assumed that pumping system to be added has leakage, if the vacuum values to loading system are maintained within a preset period of time
Less than the level of the fixed threshold, then it is assumed that loading system, there is no leakages.
But after vacuum pumping terminates, often spring back, and then produces to the elastic material component in loading system
A raw boost process, so that the vacuum values to loading system are greater than fixed threshold, and the boost process is by system itself
It is unrelated with system leak caused by attribute, therefore, in the detection mode of the prior art, it may appear that the phenomenon that erroneous judgement, judge close
The accuracy rate of envelope property is lower.
Summary of the invention
In view of this, the present invention is directed to propose a kind of detection system and detection method, to solve in the sealing for judging system
When property, the lower problem of accuracy rate.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of detection system, comprising: vacuum evacuation device, vacuum transducer, singlechip controller and connecting line；
Wherein, the vacuum evacuation device is connect by the connecting line with system under test (SUT), the vacuum transducer setting
On the connecting line, the singlechip controller is connect with the vacuum evacuation device and the vacuum transducer；
The singlechip controller is opened for controlling the vacuum evacuation device；
The vacuum evacuation device is for after switching, extracting the gas in the system under test (SUT)；
The vacuum transducer is used to detect the vacuum values in the system under test (SUT)；
The singlechip controller is for obtaining the vacuum values that the vacuum transducer detects；It is less than in the vacuum values
Preset threshold and when no longer reducing, controls the vacuum evacuation device and closes, and less than preset threshold and no longer reduces described
Vacuum values are determined as the first vacuum values；After the first preset duration, the vacuum values that the vacuum transducer detects are determined as
Second vacuum values；Based on first vacuum values and second vacuum values, vacuum values difference and vacuum values variation are calculated
Rate, and according to the vacuum values difference and the vacuum values rate of change, judge the system under test (SUT) with the presence or absence of leakage.
Further, the system under test (SUT) includes the first filler and the second filler；The connecting line includes the
One pipeline and the second pipeline；
One end of first pipeline is connect with the first end of the vacuum evacuation device, the other end of first pipeline with
First filler of the system under test (SUT) connects；One end of second pipeline is connect with the second end of the vacuum evacuation device,
The other end of second pipeline is connect with the second filler of the system under test (SUT)；
The vacuum means are set to vacuum pump.
Further, the detection system further includes first pressure sensor and second pressure sensor；
The singlechip controller is connect with the first pressure sensor and the second pressure sensor；
The first pressure sensor is connect with first filler, and the first pressure sensor is described for detecting
The pressure value of first filler；The second pressure sensor is connect with second filler, the second pressure sensor
For detecting the pressure value of second filler.
Compared with the existing technology, detection system of the present invention has the advantage that
In embodiments of the present invention, singlechip controller can control vacuum evacuation device unlatching, and vacuum evacuation device can be
After unlatching, extract system under test (SUT) in gas, the vacuum values that the available vacuum transducer of singlechip controller detects,
When vacuum values are less than preset threshold and no longer reduce, vacuum evacuation device is closed, and preset threshold will be less than and no longer reduced true
Null value is determined as the first vacuum values, and then after the first preset duration, the vacuum values that vacuum transducer is detected are determined as
Two vacuum values, then the first vacuum values and the second vacuum values are based on, vacuum values difference and vacuum values rate of change are calculated, most
Afterwards, according to vacuum values difference and vacuum values rate of change, judge system under test (SUT) with the presence or absence of leakage.In the embodiment of the present invention,
Based on the mode that vacuum values difference and vacuum values rate of change are judged, can reduce as caused by system attribute itself
Vacuum values, which are gone up, influences deterministic process bring, and then improves the accuracy rate of judgement.
Another object of the present invention is to propose a kind of detection method, to solve in the leakproofness for judging system, accurately
The lower problem of rate.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of detection method, the method are applied to any of the above-described kind of detection system, which comprises
Vacuum evacuation device is controlled by singlechip controller to open；
After switching by the vacuum evacuation device, the gas in system under test (SUT) is extracted；
The vacuum values that vacuum transducer detects are obtained by the singlechip controller, in the vacuum values less than first
Preset threshold and when no longer reducing, controls the vacuum evacuation device and closes, and subtracts described less than the first preset threshold and no longer
Small vacuum values are determined as the first vacuum values；
Through the singlechip controller after the first preset duration, the vacuum values that the vacuum transducer is detected are true
It is set to the second vacuum values；
First vacuum values and second vacuum values are based on by the singlechip controller, calculate vacuum value difference
Value and vacuum values rate of change, and according to the vacuum values difference and the vacuum values rate of change, judge described tested
System is with the presence or absence of leakage.
Further, the vacuum values that vacuum transducer detects are obtained by the singlechip controller described, in institute
Vacuum values are stated less than the first preset threshold and when no longer reducing, the vacuum evacuation device is controlled and closes, and will be described less than first
Preset threshold and the step of the vacuum values no longer reduced are determined as the first vacuum values before, the method also includes:
After obtaining the second preset duration of the vacuum evacuation device unlatching by the singlechip controller, the vacuum sensing
The vacuum values that device detects obtain third vacuum values；
If the third vacuum values are not less than the second preset threshold, described take out really is controlled by the singlechip controller
Empty device is closed, and determines that the system under test (SUT) has leakage；
If the third vacuum values are less than the second preset threshold, by vacuumizing described in singlechip controller acquisition
After device opens third preset duration, the vacuum values that the vacuum transducer detects obtain the 4th vacuum values；
If the 4th vacuum values are not less than third predetermined threshold value, described take out really is controlled by the singlechip controller
Empty device is closed, and determines that the system under test (SUT) has leakage；
If the 4th vacuum values are less than third predetermined threshold value, execute described true by singlechip controller acquisition
The vacuum values that empty sensor detects control described take out very when the vacuum values are less than the first preset threshold and no longer reduce
Empty device is closed, and the step of vacuum values less than the first preset threshold and no longer reduced are determined as the first vacuum values.
Further, described that first vacuum values and second vacuum are based on by the singlechip controller
Value, calculates vacuum values difference and the step of vacuum values rate of change includes:
The difference that second vacuum values subtract first vacuum values is calculated by the singlechip controller, obtains vacuum
Value difference value；
The ratio that the vacuum values difference Yu first preset duration are calculated by the singlechip controller obtains true
Null value rate of change.
Further, described according to the vacuum values difference and the vacuum values rate of change, judge the tested system
The step of system is with the presence or absence of leakage, comprising:
If the vacuum values difference determines the tested system less than the 4th preset threshold, by the singlechip controller
There is no leakages for system；
If the vacuum values difference is not less than the 4th preset threshold, by the singlechip controller in the vacuum values
When rate of change is less than preset rate of change threshold value, determining the system under test (SUT), there is no leakages.
Further, the vacuum evacuation device is connect by the first pipeline with the first filler of the system under test (SUT), institute
Vacuum evacuation device is stated to connect by the second pipeline with the second filler of the system under test (SUT)；
The detection system further includes first pressure sensor and second pressure sensor；
The singlechip controller is connect with the first pressure sensor and the second pressure sensor；
The first pressure sensor is connect with first filler, and the first pressure sensor is described for detecting
The pressure value of first filler；The second pressure sensor is connect with second filler, the second pressure sensor
For detecting the pressure value of second filler.
Further, before described the step of controlling vacuum evacuation device unlatching by singlechip controller, the method
Further include:
Through the singlechip controller when detecting that the vacuum evacuation device and the system under test (SUT) are connected, obtain
The pressure value of the pressure value of first filler and second filler；
If the pressure value of first filler does not change compared to the first initial pressure value, pass through the monolithic
Machine controller issues the first prompting message；The first filler that first prompting message is used to indicate the system under test (SUT) exists
Failure；
If the pressure value of second filler does not change compared to the second initial pressure value, pass through the monolithic
Machine controller issues the second prompting message；The second filler that second prompting message is used to indicate the system under test (SUT) exists
Failure；
If the pressure value of first filler changes compared to the first initial pressure value, and second filler
Pressure value change compared to the second initial pressure value, then execute and described vacuum evacuation device controlled by singlechip controller
The step of unlatching.
Another object of the present invention is to propose a kind of vehicle, with solve in the leakproofness for judging system, accuracy rate compared with
Low problem.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of vehicle, the vehicle include aforementioned any detection system.
Possessed advantage is identical compared with the existing technology for the vehicle, above-mentioned detection method and said detecting system,
This is repeated no more.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is one of a kind of schematic diagram of detection system described in the embodiment of the present invention；
Fig. 2 is two of a kind of schematic diagram of detection system described in the embodiment of the present invention；
Fig. 3 is one of a kind of step flow chart of detection method described in the embodiment of the present invention；
Fig. 4 is two of a kind of step flow chart of detection method described in the embodiment of the present invention.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Referring to Fig.1, a kind of one of the schematic diagram of detection system of the embodiment of the present invention is shown, which can wrap
It includes: vacuum evacuation device 01, vacuum transducer 02, singlechip controller 03 and connecting line 04.
Wherein, vacuum evacuation device 01 can be connect by connecting line 04 with system under test (SUT) 05, and vacuum transducer 02 can be with
It is arranged on connecting line 04, singlechip controller 03 can be connect with vacuum evacuation device 01 and vacuum transducer 02.The pumping
Vacuum plant 01 can be can be exemplary by the equipment of 05 vacuum pumping environment of system under test (SUT), which can be with
For vacuum pump.
Further, singlechip controller 03 can be used for controlling the unlatching of vacuum evacuation device 01, and vacuum evacuation device 01 can be with
For after switching, extracting the gas in system under test (SUT) 05, vacuum transducer 02 is used to detect the vacuum in system under test (SUT) 05
Value.
In the embodiment of the present invention, vacuum transducer 02 is arranged on connecting line 04, due to connecting line 04 and tested system
It unites 05 connection, so the vacuum values in connecting line 04 are equal with the vacuum values in system under test (SUT) 05, and then vacuum transducer 02
It can detecte the vacuum values in system under test (SUT) 05.
Further, singlechip controller 03 is also used to obtain the vacuum values that vacuum transducer 02 detects；In vacuum values
Less than preset threshold and when no longer reducing, control vacuum evacuation device 01 is closed, and will be less than preset threshold and no longer reduced true
Null value is determined as the first vacuum values；After the first preset duration, the vacuum values that vacuum transducer 02 detects are determined as second
Vacuum values；Based on the first vacuum values and the second vacuum values, vacuum values difference and vacuum values rate of change are calculated, and according to true
Null value difference and vacuum values rate of change judge system under test (SUT) 05 with the presence or absence of leakage.
Detection system provided in an embodiment of the present invention, singlechip controller can control vacuum evacuation device unlatching, vacuumize
Device can extract the gas in system under test (SUT) after switching, and the available vacuum transducer of singlechip controller detects
Vacuum values close vacuum evacuation device, and preset threshold and not will be less than when vacuum values are less than preset threshold and no longer reduce
The vacuum values reduced again are determined as the first vacuum values, then after the first preset duration, vacuum that vacuum transducer is detected
Value is determined as the second vacuum values, then is based on the first vacuum values and the second vacuum values, calculates vacuum values difference and vacuum values become
Change rate, finally, judging system under test (SUT) with the presence or absence of leakage according to vacuum values difference and vacuum values rate of change.The present invention
In embodiment, based on the mode that vacuum values difference and vacuum values rate of change are judged, it can reduce and belonged to by system itself
Property caused by vacuum values go up on deterministic process bring influence, and then improve judgement accuracy rate.
Referring to Fig. 2, the two of the schematic diagram of a kind of detection system of the embodiment of the present invention are shown, which can wrap
It includes: vacuum evacuation device 21, vacuum transducer 22, singlechip controller 23, connecting line 24, first pressure sensor 25 and
Two pressure sensors 26.
Wherein, vacuum evacuation device 21 can be connect by connecting line 24 with system under test (SUT) 27, and vacuum transducer 22 can be with
It is arranged on connecting line 24, singlechip controller 23 can be connect with vacuum evacuation device 21 and vacuum transducer 22.Into one
Step ground, singlechip controller 23 can be used for controlling the unlatching of vacuum evacuation device 21, and vacuum evacuation device 21 can be used in unlatching
Afterwards, the gas in system under test (SUT) 27 is extracted, vacuum transducer 22 is used to detect the vacuum values in system under test (SUT) 27.
Further, singlechip controller 23 is also used to obtain the vacuum values that vacuum transducer 22 detects；In vacuum values
Less than preset threshold and when no longer reducing, control vacuum evacuation device 21 is closed；The vacuum that preset threshold will be less than and no longer reduced
Value is determined as the first vacuum values；After the first preset duration, it is true that the vacuum values that vacuum transducer 22 detects are determined as second
Null value；Based on the first vacuum values and the second vacuum values, vacuum values difference and vacuum values rate of change are calculated, and according to vacuum
Value difference value and vacuum values rate of change judge system under test (SUT) 27 with the presence or absence of leakage.
Further, system under test (SUT) 27 may include the first filler 271 and the second filler 272, system under test (SUT) 27
It can be air-conditioning system, the braking system, etc. of vehicle.By taking system under test (SUT) 27 is air-conditioning system as an example, system under test (SUT) 27 can be with
It include: heating ventilation and air conditioning (Heating Ventilation and AirConditioning, HAVC) assembly, pressure
Contracting machine and condenser.
Further, connecting line 24 may include the first pipeline 241 and the second pipeline 242, wherein the first pipeline
241 one end can be connect with the first end of vacuum evacuation device 21, and the other end of the first pipeline 241 can be with system under test (SUT) 27
The connection of first filler 271.One end of second pipeline 242 can be connect with the second end of vacuum evacuation device 21, the second pipeline 242
The other end can be connect with the second filler 272 of system under test (SUT) 27.
In the embodiment of the present invention, vacuum evacuation device and system under test (SUT) are connected by two pipelines of setting, it can be maximum
The extraction efficiency of the raising vacuum evacuation device of degree.It is of course also possible to use other modes connect vacuum evacuation device and tested
System, for example, connect the first end on the Y-piece road with vacuum evacuation device using a Y-piece road including three ports,
First end is connect with the first filler, and third end is connect with the second filler, and the embodiment of the present invention is not construed as limiting this.
It should be noted that can correspond to pipeline set-up mode when vacuum transducer is arranged and be configured, it is exemplary,
One vacuum transducer can be set on the first pipeline and the second pipeline respectively, can also only be managed in the first pipeline or second
Road setting vacuum transducer (in Fig. 2 for a vacuum transducer is arranged), the embodiment of the present invention is not construed as limiting this.
Further, singlechip controller 23 can connect with first pressure sensor 25 and second pressure sensor 26
It connects, first pressure sensor 25 can be connect with the first filler 271, and first pressure sensor 25 can be used for detecting first and add
The pressure value of geat 271, second pressure sensor 26 can be connect with the second filler 272, and second pressure sensor 26 can be with
For detecting the pressure value of the second filler 272.
In the embodiment of the present invention, by the way that first pressure sensor is arranged in the first filler, in the second filler setting the
Two pressure sensors can read the pressure that first pressure sensor detects when vacuum evacuation device is connect with system under test (SUT)
The pressure value that value and second pressure sensor detect, according to the two pressure values, to judge the first filler and second
Whether filler is normally-open, guarantees that vacuum evacuation device can be extracted normally.
Detection system provided in an embodiment of the present invention, singlechip controller can control vacuum evacuation device unlatching, vacuumize
Device can extract the gas in system under test (SUT) after switching, and the available vacuum transducer of singlechip controller detects
Vacuum values close vacuum evacuation device, and preset threshold and not will be less than when vacuum values are less than preset threshold and no longer reduce
The vacuum values reduced again are determined as the first vacuum values, then after the first preset duration, vacuum that vacuum transducer is detected
Value is determined as the second vacuum values, then is based on the first vacuum values and the second vacuum values, calculates vacuum values difference and vacuum values become
Change rate, finally, judging system under test (SUT) with the presence or absence of leakage according to vacuum values difference and vacuum values rate of change.The present invention
In embodiment, based on the mode that vacuum values difference and vacuum values rate of change are judged, it can reduce and belonged to by system itself
Property caused by vacuum values go up on deterministic process bring influence, and then improve judgement accuracy rate；Meanwhile it can be based on the
One pressure sensor and second pressure sensor determine whether the first filler and the second filler are normal on system under test (SUT)
It opens, guarantees that vacuum evacuation device can be extracted normally.
Referring to Fig. 3, a kind of one of step flow chart of detection method of the embodiment of the present invention is shown, this method can answer
For detection system described in Fig. 1.Specifically, this method may include:
Step 301 controls vacuum evacuation device unlatching by singlechip controller.
In the embodiment of the present invention, singlechip controller can be actively to be gone to open to vacuumize to set according to the preset time
It is standby, it is also possible to when receiving the open command of staff's input, control vacuum evacuation device is opened, the embodiment of the present invention pair
This is not construed as limiting.
Step 302 passes through the vacuum evacuation device after switching, extracts the gas in system under test (SUT).
In the embodiment of the present invention, which is can be exemplary by the equipment of system under test (SUT) vacuum pumping environment,
The vacuum evacuation device can be vacuum pump, wherein vacuum pump refer to using machinery, physics, chemically or physically chemistry method pair
System under test (SUT) is evacuated and is obtained the device of vacuum.System under test (SUT) can be with the air-conditioning system of vehicle, braking system, etc..With
System under test (SUT) is vacuum evacuation device for air-conditioning system, air, the vapor, etc. in air-conditioning system can be taken away, in turn
Make air-conditioning system vacuum environment.
Step 303 obtains the vacuum values that vacuum transducer detects by the singlechip controller, in the vacuum values
It less than the first preset threshold and when no longer reducing, controls the vacuum evacuation device and closes, and will be described less than the first preset threshold
And the vacuum values no longer reduced are determined as the first vacuum values.
In the embodiment of the present invention, vacuum transducer can with the vacuum values of real-time detection system under test (SUT), singlechip controller
To obtain the vacuum values that vacuum transducer detects.Generally, in actual application scenarios, there is no the absolute vacuums that numerical value is 0
Degree, during designing production, system can all allow there are certain amount of leakage, can be according to visitor in the embodiment of the present invention
The amount of leakage that seeing allows sets the first preset threshold, exemplary, which can be 4 millibars (mbar), that is, is exactly,
As long as the vacuum values in system are less than 4mbar, i.e., it is believed that reaching vacuum state.Further, vacuum evacuation device at work,
If the vacuum values in system under test (SUT) no longer reduce, so that it may think that vacuum evacuation device extracts system under test (SUT) for vacuum ring
Border, therefore, in the embodiment of the present invention, singlechip controller can when vacuum values less than the first preset threshold and no longer reduce,
Vacuum evacuation device is controlled by singlechip controller to close.Meanwhile by vacuum values at this time, i.e., just it is less than the first preset threshold
And the vacuum values no longer reduced, it is determined as the first vacuum values, it is exemplary, it is assumed that the vacuum values in system under test (SUT) are stablized
3.8mbar, then 3.8mbar can be determined as the first vacuum values by singlechip controller.
Step 304, by the singlechip controller after the first preset duration, the vacuum transducer is detected
Vacuum values are determined as the second vacuum values.
In the embodiment of the present invention, the first preset duration, which can be, to be set according to actual conditions, in practical application, in order to allow
Elastic element in system under test (SUT) is sufficiently sprung back, which can be 5 seconds (second, s).Singlechip controller can
With the vacuum values detected in 5s and then secondary acquisition vacuum transducer that the first vacuum values have been determined, then by the vacuum values
It is determined as the second vacuum values.
Step 305 is based on first vacuum values and second vacuum values by the singlechip controller, calculates
Vacuum values difference and vacuum values rate of change, and according to the vacuum values difference and the vacuum values rate of change, judgement
The system under test (SUT) is with the presence or absence of leakage.
In the embodiment of the present invention, which can represent sprung back as system caused by boost process increased it is true
Null value, vacuum values rate of change can be represented sprung back as system caused by the increase speed that increases of vacuum values caused by boost process
Rate, singlechip controller judge that system under test (SUT), can with the presence or absence of leakage according to vacuum values difference and vacuum values rate of change
Adequately to consider that boost process bring caused by system rebound influences, and then the boost process that the system rebound of reduction generates
It is interfered with the presence or absence of bring is leaked system under test (SUT) is judged.
In conclusion detection method provided in an embodiment of the present invention, can control vacuum means by singlechip controller
Unlatching is set, the gas in system under test (SUT) can be extracted after switching by vacuum evacuation device, then pass through singlechip controller
The vacuum values that vacuum transducer detects are obtained, when vacuum values are less than preset threshold and no longer reduce, close vacuum evacuation device,
And the vacuum values reduced less than preset threshold and no longer are determined as the first vacuum values, it, will be true then after the first preset duration
The vacuum values that empty sensor detects are determined as the second vacuum values, then are based on the first vacuum values and the second vacuum values, calculate true
Null value difference and vacuum values rate of change, finally, judging system under test (SUT) according to vacuum values difference and vacuum values rate of change
With the presence or absence of leakage.In the embodiment of the present invention, based on the mode that vacuum values difference and vacuum values rate of change are judged, energy
It is enough to reduce the rise of the vacuum values as caused by system attribute itself to the interference of deterministic process bring, and then improve the accurate of judgement
Rate.
Referring to Fig. 4, the two of the step flow chart of a kind of detection method of the embodiment of the present invention are shown, this method can answer
For detection system shown in Fig. 2.Specifically, this method may include:
Step 401 is detecting that the vacuum evacuation device and the system under test (SUT) are connected by the singlechip controller
When connecing, the pressure value of first filler and the pressure value of second filler are obtained.
It, can be first by vacuum evacuation device and tested system in the leakproofness for needing to detect system under test (SUT) in the embodiment of the present invention
System connection since system under test (SUT) is closed before proceeding, and connects vacuum evacuation device and when system under test (SUT), can open first
Filler and the second filler are attached, and therefore, if normally opening the first filler in connection, first adds
The pressure value of geat will fluctuate, and normally open the second filler, then the pressure value of the second filler will also be sent out
Raw fluctuation.In this step, the pressure of the first filler can be obtained when detecting that vacuum evacuation device and system under test (SUT) are connected
The pressure value of value and the second filler, in order to whether just in subsequent step, judge the first filler and the second filler
Often open.
If the pressure value of step 402, first filler does not change compared to the first initial pressure value, pass through
The singlechip controller issues the first prompting message.
In this step, which can be the pressure value detected when the first filler is not switched on.Tool
Body, singlechip controller can start the pressure for monitoring the first filler when vacuum evacuation device and system under test (SUT) are connected
Value, if in 10s, the pressure value of the first filler is equal with the first initial pressure value always, then it is considered that the first filling
Mouth is not normal to be opened.When the first filler cannot be opened normally, vacuum evacuation device just can not be extracted normally in system under test (SUT)
Gas, therefore, in this step, singlechip controller can issue the first prompting message, which can be used for referring to
Showing the first filler of system under test (SUT), there are failures, in order to which user can in time overhaul the first filler, Jin Erbao
Card vacuum evacuation device can be extracted normally.
If the pressure value of step 403, second filler does not change compared to the second initial pressure value, pass through
The singlechip controller issues the second prompting message.
In this step, which can be the pressure value detected when the second filler is not switched on.Tool
Body, singlechip controller can start the pressure for monitoring the second filler when vacuum evacuation device and system under test (SUT) are connected
Value, if in 10s, the pressure value of the second filler is equal with the second initial pressure value always, then it is considered that the second filling
Mouth is not normal to be opened.When the second filler cannot be opened normally, vacuum evacuation device just can not be extracted normally in system under test (SUT)
Gas, therefore, in this step, singlechip controller can issue the second prompting message, which can be used for referring to
Showing the second filler of system under test (SUT), there are failures, in order to which user can in time overhaul the second filler, Jin Erbao
Card vacuum evacuation device can be extracted normally.
Correspondingly, if the first filler and the second filler are normally opened, subsequent step can be executed.
If the pressure value of step 404, first filler changes compared to the first initial pressure value, and described
The pressure value of two fillers changes compared to the second initial pressure value, controls vacuum means by the singlechip controller
Set unlatching.
Specifically, the implementation of this step can refer to above-mentioned steps 301, this will not be repeated here for the embodiment of the present invention.
Step 405 passes through the vacuum evacuation device after switching, extracts the gas in system under test (SUT).
Specifically, the implementation of this step can refer to above-mentioned steps 202, this will not be repeated here for the embodiment of the present invention.
Step 406 is obtained after the vacuum evacuation device opens the second preset duration, the vacuum by singlechip controller
The vacuum values that sensor detects obtain third vacuum values.
In actual application scenarios, after vacuum evacuation device is started to work, usually first by the incoagulability in system under test (SUT)
Gas, for example, air, hydrogen, nitrogen, lube vapor etc., extraction.And in the case where system under test (SUT) is not revealed, vacuum evacuation device
After extracting a period of time, it will be able to exhaust the incoagulable gas in system under test (SUT), the vacuum values in system under test (SUT) are dropped
As low as to a certain degree.Therefore, it in this step, can be tested in advance using different vacuum evacuation devices, to determine that second is pre-
If duration, which can indicate the incoagulable gas extraction in system finishing required duration, exemplary,
Second preset duration can be 20s,.After vacuum evacuation device opens the second preset duration, obtains vacuum transducer and detect
Third vacuum values determine system under test (SUT) with the presence or absence of leakage based on the third vacuum values in order in subsequent step.
If step 407, the third vacuum values are not less than the second preset threshold, controlled by the singlechip controller
The vacuum evacuation device is closed, and determines that the system under test (SUT) has leakage.
It in this step, can be tested in advance using different vacuum evacuation devices, to determine the second preset threshold, this
Two preset thresholds can indicate after extracting the incoagulable gas in system that the max vacuum value of system is exemplary, this
Two preset thresholds can be 33mbar.It, can be by the second preset duration and the input operation of the second preset threshold when specific implementation
In the PCL program of singlechip controller, in order to which singlechip controller is controlled.
Assuming that third vacuum values are 35mbar, then singlechip controller can directly control vacuum evacuation device closing, and
Determine that system under test (SUT) has leakage, in this way, can determine the leakproofness of system under test (SUT) without carrying out subsequent step, improving
Detection efficiency has saved testing cost.It, can also be to when third vacuum values are not less than the second preset threshold in practical application
User sounds an alarm, in order to which user can make application measure in time, at this point, user can directly examine system under test (SUT)
It repairs, can also be further added by vacuum evacuation device, or the more powerful vacuum evacuation device of replacement performance re-starts vacuumize again
Operation, if the vacuum pumping re-started, the second preset duration that the vacuum values of system under test (SUT) are opened in vacuum evacuation device
Afterwards, it is also the failure to meet the second preset threshold, then system under test (SUT) is overhauled.
If step 408, the third vacuum values obtain institute less than the second preset threshold, by the singlechip controller
After stating vacuum evacuation device unlatching third preset duration, the vacuum values that the vacuum transducer detects obtain the 4th vacuum values.
In this step, if third vacuum values less than the second preset threshold, it may be considered that, extracting incoagulable gas
In the process, the leakproofness of system under test (SUT) is in normal condition.At this point it is possible to continue to extract system under test (SUT).
In actual application scenarios, with the operation of vacuum evacuation device, the vacuum values in system under test (SUT) can be continuously increased, quilt
Absolute pressure in examining system can be reduced constantly, when the absolute pressure in system under test (SUT) be reduced to it is corresponding with environment temperature full
When with water vapor pressure, remaining hydrone will be boiled into vapor in system, continue to extract out.Generally, vacuum evacuation device
After being exhausted incoagulable gas, the absolute pressure in system under test (SUT) will make remaining hydrone in system that will boil
Vapor is risen into, vacuum evacuation device will start to extract the vapor in system under test (SUT) at this time.
It is normally taken away in the case that system under test (SUT) do not reveal in incoagulable gas, one section in unlatching of vacuum evacuation device
After time, it will be able to exhaust the vapor in system under test (SUT), the vacuum values in system under test (SUT) are reduced to a certain extent.Cause
This in this step, can be tested using different vacuum evacuation devices in advance, and to determine third preset duration, the third is pre-
If duration, which can indicate also to extract the vapor in system, finishes required duration, exemplary, which can
Think 30s,.After vacuum evacuation device opens third preset duration, the 4th vacuum values that vacuum transducer detects are obtained, so as to
In subsequent step, determine system under test (SUT) with the presence or absence of leakage based on the 4th vacuum values.
If step 409, the 4th vacuum values are not less than third predetermined threshold value, controlled by the singlechip controller
The vacuum evacuation device is closed, and determines that the system under test (SUT) has leakage.
It in this step, can be tested in advance using different vacuum evacuation devices, to determine third predetermined threshold value, this
Three preset thresholds can indicate after also extracting the vapor in system, the max vacuum value of system, exemplary, the third
Preset threshold can be 15mbar.When specific implementation, third preset duration and third predetermined threshold value input can be operated in
In the PCL program of singlechip controller, in order to which singlechip controller is controlled.
Assuming that the 4th vacuum values are 17mbar, then singlechip controller can directly control vacuum evacuation device closing, and
Determine that system under test (SUT) has leakage, in this way, can determine the leakproofness of system under test (SUT) without carrying out subsequent step, improving
Detection efficiency has saved testing cost.It, can also be to when the 4th vacuum values are not less than third predetermined threshold value in practical application
User sounds an alarm, in order to which user can make application measure in time, at this point, user can directly examine system under test (SUT)
It repairs, can also be further added by vacuum evacuation device, or the more powerful vacuum evacuation device of replacement performance re-starts vacuumize again
Operation, if the vacuum pumping re-started, third preset duration that the vacuum values of system under test (SUT) are opened in vacuum evacuation device
Afterwards, it is also the failure to meet third predetermined threshold value, then system under test (SUT) is overhauled.
Correspondingly, if the 4th vacuum values are less than third predetermined threshold value, it is believed that primarily determine, the sealing of system under test (SUT)
Property is met the requirements at this time, at this point it is possible to continue to extract using vacuum evacuation device, and executes subsequent step.
If step 410, the 4th vacuum values are less than third predetermined threshold value, obtained by the singlechip controller true
The vacuum values that empty sensor detects control described take out very when the vacuum values are less than the first preset threshold and no longer reduce
Empty device is closed, and the vacuum values less than the first preset threshold and no longer reduced are determined as the first vacuum values.
Specifically, the implementation of this step can refer to above-mentioned steps 203, this will not be repeated here for the embodiment of the present invention.
Step 411, by the singlechip controller after the first preset duration, the vacuum transducer is detected
Vacuum values are determined as the second vacuum values.
Specifically, the implementation of this step can refer to above-mentioned steps 204, this will not be repeated here for the embodiment of the present invention.
Step 412 is based on first vacuum values and second vacuum values by the singlechip controller, calculates
Vacuum values difference and vacuum values rate of change, and according to the vacuum values difference and the vacuum values rate of change, judgement
The system under test (SUT) is with the presence or absence of leakage.
In this step, the difference that the second vacuum values subtract the first vacuum values can be calculated by singlechip controller, obtained true
Null value difference calculates the ratio of vacuum values difference and the first preset duration by singlechip controller, obtains vacuum values variation speed
Rate.
It is possible to further judge whether system under test (SUT) leaks by following sub-steps:
Sub-step (1): if the vacuum values difference is determined less than the 4th preset threshold by the singlechip controller
There is no leakages for the system under test (SUT).
It in this step, can be tested in advance using different vacuum evacuation devices, to determine the 4th preset threshold, this
Four preset thresholds can indicate the system that leakage is not present in normal rebound, and the lift-off value for the vacuum values that will cause is exemplary,
4th preset threshold can be 7mbar.Assuming that vacuum values difference be 3mbar, then singlechip controller can determine it is tested
There is no leakages for system.
Further, if vacuum values difference is not less than the 4th preset threshold, speed can changed in conjunction with vacuum values
Rate determines whether system under test (SUT) leaks.
Sub-step (2): if the vacuum values difference is not less than the 4th preset threshold, existed by the singlechip controller
When the vacuum values rate of change is less than preset rate of change threshold value, determining the system under test (SUT), there is no leakages.
It in this step, can be tested in advance using different vacuum evacuation devices, to determine preset rate of change threshold
Value, the preset rate of change threshold value can indicate to be not present the system leaked in normal rebound, the rate of change of vacuum values,
Exemplary, which can be 1.5mbar/s, and certainly, which may be
Other values, for example, 1.33mbar/s.By taking preset rate of change threshold value is 1.5mbar/s as an example, it is assumed that vacuum values difference is
7.3mbar, vacuum values rate of change are 1.46mbar/s, then singlechip controller can determine that there is no let out system under test (SUT)
Dew.
In practical application, singlechip controller, can be to system under test (SUT) again after determining system under test (SUT) there is no leaking
The first vacuum pumping is carried out, that is, is exactly to be vacuumized for the second time, to reduce raised vacuum values, example in system under test (SUT)
, which can be 5s, after vacuumizing end for the second time, so that it may add the first of dispenser pump
Note pipette tips are connect with the first filler, and the second filling pipette tips are connect with the second filler, are then infused liquid by dispenser pump
Enter in system under test (SUT).
In conclusion detection method provided in an embodiment of the present invention, can first pass through singlechip controller in the first filling
When mouth and/or the second filler are not opened normally, prompting message is issued, carries out malfunction elimination convenient for user, if two filling
Mouth is all normal to be opened, then controls vacuum evacuation device unlatching, can be extracted in system under test (SUT) after switching by vacuum evacuation device
Gas, the vacuum values that detect of vacuum transducer are then obtained by singlechip controller, are less than preset threshold in vacuum values
And when no longer reducing, vacuum evacuation device is closed, and the vacuum values reduced less than preset threshold and no longer are determined as the first vacuum
Value, then after the first preset duration, the vacuum values that vacuum transducer is detected are determined as the second vacuum values, then are based on first
Vacuum values and the second vacuum values calculate vacuum values difference and vacuum values rate of change, finally, according to vacuum values difference and
Vacuum values rate of change judges system under test (SUT) with the presence or absence of leakage.In the embodiment of the present invention, it is based on vacuum values difference and vacuum
The mode that value rate of change is judged can reduce the vacuum values as caused by system attribute itself and go up to deterministic process band
The interference come, and then improve the accuracy rate of judgement.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of detection system, which is characterized in that the detection system includes: vacuum evacuation device, vacuum transducer, single-chip microcontroller control
Device and connecting line processed；
Wherein, the vacuum evacuation device is connect by the connecting line with system under test (SUT), and the vacuum transducer is arranged in institute
It states on connecting line, the singlechip controller is connect with the vacuum evacuation device and the vacuum transducer；
The singlechip controller is opened for controlling the vacuum evacuation device；
The vacuum evacuation device is for after switching, extracting the gas in the system under test (SUT)；
The vacuum transducer is used to detect the vacuum values in the system under test (SUT)；
The singlechip controller is for obtaining the vacuum values that the vacuum transducer detects；It is less than in the vacuum values default
Threshold value and when no longer reducing, controls the vacuum evacuation device and closes, and by the vacuum less than preset threshold and no longer reduced
Value is determined as the first vacuum values；After the first preset duration, the vacuum values that the vacuum transducer detects are determined as second
Vacuum values；Based on first vacuum values and second vacuum values, vacuum values difference and vacuum values rate of change are calculated,
And according to the vacuum values difference and the vacuum values rate of change, judge the system under test (SUT) with the presence or absence of leakage.
2. detection system according to claim 1, which is characterized in that the system under test (SUT) includes the first filler and the
Two fillers；The connecting line includes the first pipeline and the second pipeline；
One end of first pipeline is connect with the first end of the vacuum evacuation device, the other end of first pipeline with it is described
First filler of system under test (SUT) connects；One end of second pipeline is connect with the second end of the vacuum evacuation device, described
The other end of second pipeline is connect with the second filler of the system under test (SUT)；
The vacuum means are set to vacuum pump.
3. detection system according to claim 1, which is characterized in that the detection system further includes first pressure sensor
And second pressure sensor；
The singlechip controller is connect with the first pressure sensor and the second pressure sensor；
The first pressure sensor is connect with first filler, and the first pressure sensor is for detecting described first
The pressure value of filler；The second pressure sensor is connect with second filler, and the second pressure sensor is used for
Detect the pressure value of second filler.
4. a kind of detection method, which is characterized in that the method is applied to any detection system of claims 1 to 3, institute
The method of stating includes:
Vacuum evacuation device is controlled by singlechip controller to open；
After switching by the vacuum evacuation device, the gas in system under test (SUT) is extracted；
The vacuum values that vacuum transducer detects are obtained by the singlechip controller, it is default less than first in the vacuum values
Threshold value and when no longer reducing, controls the vacuum evacuation device and closes, and less than the first preset threshold and no longer reduces described
Vacuum values are determined as the first vacuum values；
Through the singlechip controller after the first preset duration, the vacuum values that the vacuum transducer detects are determined as
Second vacuum values；
By the singlechip controller be based on first vacuum values and second vacuum values, calculate vacuum values difference with
And vacuum values rate of change, and according to the vacuum values difference and the vacuum values rate of change, judge the system under test (SUT)
With the presence or absence of leakage.
5. detection method according to claim 4, which is characterized in that obtained very described by the singlechip controller
The vacuum values that empty sensor detects control described take out very when the vacuum values are less than the first preset threshold and no longer reduce
Empty device is closed, and the step of vacuum values less than the first preset threshold and no longer reduced are determined as the first vacuum values it
Before, the method also includes:
After obtaining the second preset duration of the vacuum evacuation device unlatching by the singlechip controller, the vacuum transducer inspection
The vacuum values measured obtain third vacuum values；
If the third vacuum values are not less than the second preset threshold, the vacuum means are controlled by the singlechip controller
Closing is set, and determines that the system under test (SUT) has leakage；
If the third vacuum values obtain the vacuum evacuation device less than the second preset threshold, by the singlechip controller
After opening third preset duration, the vacuum values that the vacuum transducer detects obtain the 4th vacuum values；
If the 4th vacuum values are not less than third predetermined threshold value, the vacuum means are controlled by the singlechip controller
Closing is set, and determines that the system under test (SUT) has leakage；
If the 4th vacuum values are less than third predetermined threshold value, execute described by singlechip controller acquisition vacuum biography
The vacuum values that sensor detects control the vacuum means when the vacuum values are less than the first preset threshold and no longer reduce
Set closing, and the step of vacuum values less than the first preset threshold and no longer reduced are determined as the first vacuum values.
6. detection method according to claim 4, which is characterized in that it is described be based on by the singlechip controller it is described
First vacuum values and second vacuum values, calculate vacuum values difference and the step of vacuum values rate of change includes:
The difference that second vacuum values subtract first vacuum values is calculated by the singlechip controller, obtains vacuum value difference
Value；
The ratio that the vacuum values difference Yu first preset duration are calculated by the singlechip controller, obtains vacuum values
Rate of change.
7. detection method according to claim 4, which is characterized in that described according to the vacuum values difference and described true
Null value rate of change judges the step of system under test (SUT) is with the presence or absence of leakage, comprising:
If the vacuum values difference determines the system under test (SUT) not less than the 4th preset threshold, by the singlechip controller
There are leakages；
If the vacuum values difference is not less than the 4th preset threshold, changed by the singlechip controller in the vacuum values
When rate is less than preset rate of change threshold value, determining the system under test (SUT), there is no leakages.
8. detection method according to claim 4, which is characterized in that
The vacuum evacuation device is connect by the first pipeline with the first filler of the system under test (SUT), and the vacuum evacuation device is logical
The second pipeline is crossed to connect with the second filler of the system under test (SUT)；
The detection system further includes first pressure sensor and second pressure sensor；
The singlechip controller is connect with the first pressure sensor and the second pressure sensor；
The first pressure sensor is connect with first filler, and the first pressure sensor is for detecting described first
The pressure value of filler；The second pressure sensor is connect with second filler, and the second pressure sensor is used for
Detect the pressure value of second filler.
9. detection method according to claim 8, which is characterized in that vacuumized described by singlechip controller control
Before the step of device is opened, the method also includes:
Through the singlechip controller when detecting that the vacuum evacuation device and the system under test (SUT) are connected, described in acquisition
The pressure value of the pressure value of first filler and second filler；
If the pressure value of first filler does not change compared to the first initial pressure value, pass through the single-chip microcontroller control
Device processed issues the first prompting message；There is event in the first filler that first prompting message is used to indicate the system under test (SUT)
Barrier；
If the pressure value of second filler does not change compared to the second initial pressure value, pass through the single-chip microcontroller control
Device processed issues the second prompting message；There is event in the second filler that second prompting message is used to indicate the system under test (SUT)
Barrier；
If the pressure value of first filler changes compared to the first initial pressure value, and the pressure of second filler
Force value changes compared to the second initial pressure value, then executes described by singlechip controller control vacuum evacuation device unlatching
The step of.
10. a kind of vehicle, which is characterized in that the vehicle includes any detection system of claims 1 to 3.
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