CN109425466A - Detect the equipment and detection method of the leakproofness of workpiece - Google Patents
Detect the equipment and detection method of the leakproofness of workpiece Download PDFInfo
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- CN109425466A CN109425466A CN201710779808.8A CN201710779808A CN109425466A CN 109425466 A CN109425466 A CN 109425466A CN 201710779808 A CN201710779808 A CN 201710779808A CN 109425466 A CN109425466 A CN 109425466A
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- sealing
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- capillary
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- container
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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
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- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
This application involves a kind of detection devices, it may include sealing container, capillary and sealing determining section, wherein, sealing container is for accommodating workpiece, and seal member can be arranged so that sealing container is isolated into the first sealing space and the second sealing space in the excircle of workpiece；One end of capillary is connected to by sealing pipeline with the second sealing space, and the other end protrudes into the container for accommodating liquid；And after inflating to the first sealing space, sealing determining section determines the leakproofness grade of workpiece according to the liquid surface of capillarity variation in capillary.Simple according to the assay device structures of the application, at low cost, detection accuracy is high and detection efficiency is high.
Description
Technical field
This application involves a kind of equipment of leakproofness for detecting workpiece and detection method more particularly to a kind of detector lens
The equipment and detection method of leakproofness.
Background technique
On-vehicle lens working environment is more severe, often is exposed under wind and frost sleet, therefore it is required that camera lens is with good
Leakproofness influences to be imaged to prevent the foreign matters such as water and sand and dust from entering system.It therefore, is all that leakproofness is good for the camera lens that guarantees to dispatch from the factory
Good camera lens needs detector lens to seal implementations after the completion of lens erection.
The current mode in testing lens leakproofness has following several: (1) helium molecule leak detection；(2) vacuum decay is surveyed
Leak instrument air tightness test；(3) contact watertightness test.Wherein, helium molecule leak detection measuring accuracy meets test request, but
Detection need to use mass spectrograph, and equipment cost is higher；Vacuum decay leak detector air tightness test, because by way of decline of pressure into
Row detection, precision is relatively poor, and air-tightness bad camera lens in part can not detect；Contact watertightness test precision meets test and wants
It asks, but camera lens touches water when because of test, needs to carry out manual wipping after the completion of test, material is placed through screw thread and tightens and realize
Sealing, efficiency is lower and whole by eye-observation, and there are human errors.
And non-contact sealing propertytest is a kind of method for applying to product hermeticity detection device, relative to traditional watertight
Property a kind of test method for being improved of test, precision is high, and camera lens is without contacting water when test, and loading and unloading are convenient and test result
It is captured by visual machine, it can effective fool proof (visual machine replaces artificial judgment, avoids the error generated by artificial judgement).
Summary of the invention
The application's is designed to provide a kind of detection device, and the assay device structures are simple, at low cost, and detection accuracy is high
And detection efficiency is high.
On the one hand the application provides a kind of detection device of leakproofness for detecting workpiece, it may include: sealing container is used for
Workpiece is accommodated, the periphery of workpiece is provided with seal member so that sealing container is isolated into the first sealing space and the second sealing sky
Between；Capillary, one end are connected to by sealing pipeline with the second sealing space, and the other end protrudes into the container for accommodating liquid；And
Determining section is sealed, after inflating to the first sealing space, sealing determining section is determined according to the liquid surface of capillarity variation in capillary
The leakproofness grade of workpiece.
On the other hand the application provides a kind of detection method using above equipment, comprising:
(a) workpiece is placed in sealing container, and in the position that the workpiece is contacted with the sealing container inner wall
Seal member is set, so that the sealing container is divided into the first sealing space and the second sealing space；
(b) it is inflated by the air inlet of sealing container to first sealing space；And
(c) the leakproofness grade of the workpiece is determined according to the liquid surface of capillarity variation in capillary.
According to the application detection workpiece leakproofness equipment and detection method, by by workpiece (for example, vehicle-mounted mirror
Head) it is placed in the cavity of sealing, by sealing the design of pipeline, realize the contactless air-leakage test of workpiece.According to
The equipment and detection method of the leakproofness of the detection workpiece of the application are easy to observe using the principle of capillary phenomenon by generating
Liquid level, convert the variation of liquid level in capillary for the leakage of workpiece (for example, on-vehicle lens) gas to present, thus
The leakage that gas can accurately be embodied avoids directly contacting for workpiece and liquid, ensure that workpiece in the detection process without times
What is damaged, and keeps testing result more acurrate.
In one embodiment, camera can be used dynamically to capture the image information of capillary fluid change, then make
The leakproofness grade of the workpiece is determined according to image information with processor.Image is completed by using camera and processor
Acquisition, calculation processing replaces artificial judgment using visual machine, avoids artificial for traditional watertightness test
Judgement and the error generated, can effective fool proof, while ranking can be also carried out to testing result, detection accuracy and accuracy are more
High (measuring accuracy is higher than vacuum decay leak detector air tightness test close to helium molecule leak detection).
Detailed description of the invention
By referring to detailed description made by the following drawings, the above and further advantage of presently filed embodiment will become
It obtains it is clear that attached drawing is intended to show that the illustrative embodiments of the application rather than is limited.Phase in different attached drawings
Same or similar element is denoted by the same reference numerals, in the accompanying drawings:
Fig. 1 diagrammatically illustrates the structure arrangement perspective view of the detection device of an embodiment according to the application；
Fig. 2, which is diagrammatically illustrated, changes the schematic diagram detected using liquid surface of capillarity according to the application；
Fig. 3 diagrammatically illustrates interconnected according to the compressing structure and top cover labyrinth of the embodiment of the application
Perspective view；And
Fig. 4 diagrammatically illustrates the structure arrangement perspective view of the lower sealing cover of an embodiment according to the application.
Specific embodiment
The application is described in further detail with embodiment with reference to the accompanying drawing.It is understood that this place
The specific embodiment of description is used only for explaining related invention, rather than the restriction to the invention.It should be evident that for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.It also should be noted that for ease of description, only the parts related to the present invention are shown in attached drawing.
It should be understood that in this application, when structure or component are described as be in another structure or component "upper", " connection
To " or " being attached to " another structure or when component, can directly in another structure or component, be connected directly to or be attached to another
One structure or component, or structure between or component may be present.When component be known as " located immediately at " another component "upper",
When " being connected directly to " or " being attached directly to " another component, there is no components between.In the specification, identical
Label refer to identical element.As used in this article, term "and/or" include one in associated listed item or
Multiple any and all combinations.
" ... under ", " in ... lower section ", "lower", " ... on ", the spaces relative terms such as "upper" can be at this
It is used in text in order to describe convenient, it is (in addition more to describe an elements or features and another element as shown in the drawings
A element) or another feature (in addition multiple features) relationship.It should be understood that other than the direction described in attached drawing,
Space relative terms be also intended to cover device in use or operation in different directions.For example, if device in attached drawing
Overturning, then be described as that other components or feature " it will be oriented in other components or the component of feature " below " or " under "
On ".Therefore, exemplary language " in ... lower section " may include " ... on " and " in ... lower section " both direction.
Terminology used herein is only used for the purpose of description specific embodiment, it is no intended to limit the application.Such as exist
It is used herein, unless clearly dictating in context, packet otherwise is also intended to without limiting the feature of single plural form
Include the feature of plural form.It will also be appreciated that term " comprising ", " including " do not preclude the presence or addition of it is one or more its
Its feature, step, component, assembly unit and/or their combination.In addition, using "available" table when describing presently filed embodiment
Show " one or more embodiments of the application ".Also, term " illustrative " is intended to refer to example or illustration.
As it is used in the present context, term " substantially ", " about " and similar term are used as the approximate term of table, and
Be not used as the term of table degree, and be intended to illustrate by by those skilled in the art will appreciate that, measured value or calculated value
In inherent variability.
Unless otherwise defined, otherwise all terms (including technical terms and scientific words) used herein all have with
The application one skilled in the art's is generally understood identical meaning.It will also be appreciated that term (such as in everyday words
Term defined in allusion quotation) it should be interpreted as having and their consistent meanings of meaning in the context of the relevant technologies, and
It will not be explained with idealization or excessively formal sense, unless clear herein so limit.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the application can
To be combined with each other.The application is described in detail below with reference to the accompanying drawings and in conjunction with embodiment.
Below with reference to Fig. 1-Fig. 4 detailed description according to the leak-testing apparatus of the application.
Fig. 1 diagrammatically illustrates the structure of the equipment of the leakproofness of the detection workpiece according to the embodiment of the application
Arrange perspective view.It as shown in fig. 1, include sealing container 10, capillary according to the equipment of the leakproofness of the detection workpiece of the application
Pipe 20 and sealing determining section 30.Sealing container 10, can be in the excircle of workpiece after accommodating workpiece for accommodating workpiece
(that is, position that workpiece and sealing container 10 contact) setting seal member is to be isolated into the first sealing space for sealing container 10
10A and the second sealing space 10B.One end of capillary 20 is connected to by sealing pipeline 60 with the second sealing space 10B, the other end
It protrudes into the container 50 for accommodating liquid.After inflating to the first sealing space 10A, sealing determining section 30 can be according in capillary
Liquid surface of capillarity variation determine the leakproofness grade of the workpiece.
Fig. 2 shows change the schematic diagram detected using liquid surface of capillarity according to the application.In the inspection of workpiece product
During survey, one end of capillary 20 is stretched in the liquid in container 50, it is desirable that extending into 52 or less the liquid level of container 50
5-10mm.Because capillary 20 is inserted into liquid, there is capillary phenomenon and rises to certain altitude in the liquid level 54 in capillary 20, it
After reach balance no longer rise.Workpiece is placed in the sealing container 10 of equipment, then to the first sealing space of detection device
10A is filled with after gas, if workpiece product, because leakproofness is bad, there will be gases to leak into the second sealing space 10B, so
Gas leakage B is made to enter capillary 20 followed by the sealing pipeline 60 being connected to capillary 20 afterwards.In this way, raw wool is thin
Balance in pipe 20 is broken, and liquid level 54 is caused to decline.Therefore, pass through the liquid level situation of change in capillary 20, so that it may
To judge the leakproofness quality of test piece.
In the present embodiment, sealing container 10 is cooperatively formed by top cover labyrinth 12 and lower sealing cover 14.Sealing container 10
Inside it is provided with seal member.In other words, top cover labyrinth 12 and lower sealing cover 14 can be respectively arranged with seal member (for example, sealing
Enclose 205, sealing ring 405), which is arranged to the inner wall around top cover labyrinth 12 and lower sealing cover 14 respectively.When upper close
When capping 12 is connected with the mutual cooperation of lower sealing cover 14, the seal member in top cover labyrinth 12 and lower sealing cover 14 is cooperatively connected,
It thus effectively will can be formed by cavity between top cover labyrinth 12 and lower sealing cover 14 to be isolated from the outside, so that the cavity
Interior gas will not flow to the external world, i.e., will not gas leakage.When workpiece A is placed in the sealing container 10 in above equipment, in example
Under the action of external force, seal member is squeezed deformation, is formed and is sealed with the outer wall of workpiece A, thus by sealing container 10 every
From at two sealing spaces, that is, the first sealing space 10A and the second sealing space 10B.
Fig. 3 is diagrammatically illustrated to be connected with each other according to the compressing structure and top cover labyrinth of the embodiment of the application
Perspective view.As shown in figure 3, in the present embodiment, the equipment according to the leakproofness of the detection workpiece of the application further includes pressure
Locking structure 40 provides pressure and top cover labyrinth 12 and lower sealing cover 14 is made to cooperatively form sealing container 10.According to the inspection of the application
The equipment for surveying the leakproofness of workpiece further includes driving mechanism 401, to provide driving force for compressing structure 40, so that compressing structure 40
It moves up and down.Compressing structure 40 includes installation part 402 and connecting shaft 403.Driving mechanism 401 is located at entire compressing structure 40 most
Top, the selection of driving mechanism 401 does not have limitation and provides required driving force as long as can guarantee overall structural strength, i.e., full
Foot requires.In the present embodiment, driving mechanism 401 is cylinder.For example, according to another embodiment herein, driving machine
Structure 401 is the combined mechanism of motor and screw rod.
In the present embodiment, installation part 402 is located at the lower section of driving mechanism 401, installation part 402 and driving mechanism 401
Connection, connecting shaft 403 connect with installation part 402 and is fixedly mounted on installation part 402, meanwhile, connecting shaft 403 also with it is upper close
12 connection of capping.The driving force of driving mechanism 401 is transferred to connecting shaft 403 by installation part 402, and is driven by connecting shaft 403
Dynamic top cover labyrinth 12.In the present embodiment, installation part 402 is using mounting plate.In the present embodiment, top cover labyrinth 12
It is fixedly connected in connecting shaft 403 by knob plunger, makes driving mechanism 401 that top cover labyrinth 12 can be driven close close to or far under
14 movement of capping.It should be pointed out that according to the not office of the fixed form between the top cover labyrinth 12 and driving mechanism 401 of the application
Knob plunger is limited by realize, can also be fixed in such a way that bolt and nut connects or grafting, bonding are welded
Etc. modes fix.As long as meeting structural strength, leakproofness is not influenced, that is, is met the requirements.
In the present embodiment, driving mechanism 401 and top cover labyrinth 12 are connected with each other, and driving mechanism 401 is positioned at upper
The top of sealing cover 12, driving mechanism 401 can drive top cover labyrinth 12 to do linear movement up and down reciprocatingly, close to or far under
Sealing cover 14.Top cover labyrinth 12 is located at the top of lower sealing cover 14, and top cover labyrinth 12 can be under under the driving of driving mechanism 401
Sealing cover 14 contacts and cooperatively forms seal cavity.The air inlet being connected to the first sealing space 10A is provided on top cover labyrinth 12
Mouth 122, air inlet 122 are connected with extraneous gas source, can be inflated by air inlet 122 to seal cavity.In present embodiment
In, air inlet 122 is arranged on the side wall of top cover labyrinth 12.Certainly, the upper table in top cover labyrinth also can be set in air inlet 122
Face is able to satisfy sealing requirements as long as structurally reasonable, convenient for connection, can normally be inflated by external air source.
Fig. 4 diagrammatically illustrates the structure arrangement perspective view of the lower sealing cover of an embodiment according to the application.Such as
Shown in Fig. 4, lower sealing cover 14 includes the shell 142 with hollow structure, and be formed be connected to the second sealing space 10B go out
Port 143.The supporting element 141 of shell 142 being partially formed for disposing workpiece A.One end of sealing pipeline 60 passes through close
Tube sealing connector is connected on gas outlet 143.In the present embodiment, gas outlet 143 is arranged on the side wall of shell 142.Certainly,
Gas outlet 143 also can be set on the bottom surface of shell 142.
In one embodiment, the one end for sealing pipeline 60 is connected on gas outlet 143 by sealed fitting, another
End is connected to one end of capillary 20.One end of the capillary 20 is fixed by capillary fixed block 22 and is connected to sealing pipeline
60 other end.The other end of capillary 20 extend into the liquid level in container 50 or less.In one embodiment, capillary 20
The other end extend into the liquid level in container 50 or less such as 5-10mm.Therefore, there is capillary phenomenon in the liquid level in capillary 20
And certain altitude is risen to, reach balance later and no longer rises.In the present embodiment, the liquid held in container 50 is water,
It can certainly be other liquid, as long as free from environmental pollution not will cause cost waste.
In addition, driving mechanism 141, the structural relation of top cover labyrinth 12 and lower sealing cover 14 and positional relationship are not limited to
In above-mentioned embodiment.For example, lower sealing cover 14 can also be located on top cover labyrinth 12 and driving mechanism 141.As long as full
Sufficient driving mechanism 141 can drive top cover labyrinth 12 mutually closely to connect with lower sealing cover 14 and meet the requirements.
According to the above embodiment of the application, top cover labyrinth 12 is driven by the driving mechanism 141 in compressing structure 40
The mode of pushing, so that top cover labyrinth 12, which contacts with lower sealing cover 14 and squeezes seal member therein, makes its deformation, so that on
Sealing cover 12 and lower sealing cover 14 cooperatively form sealing, and workpiece position is in the cavity of sealing, in addition sealing pipeline
Design, realizes the contactless method for conducting leak test of workpiece (for example, camera lens), converts capillary for the leakage of workpiece gas
The height change of liquid level is presented in pipe 20, avoids directly contacting for workpiece and water, ensure that camera lens in the detection process without
Any damage, so that testing result is more acurrate.
In embodiments, sealing determining section 30 includes camera 32 and processor 34.Camera 32 is for dynamically capturing capillary
The image information of 20 fluid change of pipe.Any position that can monitor that liquid level changes in capillary 20 is arranged in camera 32,
As long as the situation of fluid change in capillary 20 can be clearly photographed.In the present embodiment, camera 32 can dynamic
Obtain the image information of liquid level variation in capillary 20, it can by setting the frequency of taking pictures of camera 32, utilize camera
32 timings are continuously taken pictures, to obtain the image information that liquid level changes in capillary 20.Processor 34 can obtain image information,
And the leakproofness grade of workpiece is determined according to image information.In the present embodiment, processor 34 includes calculation processing unit
341 and display unit 342.Calculation processing unit 341 is connect with camera 32, the image information come for obtaining the transmission of camera 32,
Calculate and judge that testing result, then the display unit 342 by connecting with calculation processing unit 341 show testing result.
Capture, the calculation processing that image is completed by camera 32 and processor 34, relative to traditional watertightness test
Speech replaces artificial judgment using visual machine, avoids the artificial error for judging and generating, can effective fool proof, while can also be right
Testing result carries out ranking, and detection accuracy is higher with accuracy.In addition, the present invention is realized to the non-contact of detector lens
While performing leak test, also solves the problems, such as that time-consuming for manual work operation, effectively improve detection efficiency.
It is at low cost according to the assay device structures cylinder list of the application according to the above embodiment of the application, effectively drop
Low testing cost；According to the detection device of the application when detecting workpiece, seen by vision camera automatic identification instead of human eye
It examines, effectively improving detection accuracy, (measuring accuracy is higher than vacuum decay leak detector air-tightness close to helium molecule leak detection
Test) and detection efficiency, solve the problems, such as artificial erroneous judgement；The detection process for detecting workpiece is the mistake of non-contact watertightness test
Journey, so most of manual procedure such as liquid on wiping workpiece has been saved, so that precision and efficiency of detecting is higher
While save detection time.
Above description is only the better embodiment of the application and the explanation to institute's application technology principle.Art technology
Personnel should be appreciated that invention scope involved in the application, however it is not limited to skill made of the specific combination of above-mentioned technical characteristic
Art scheme, while should also cover in the case where not departing from the inventive concept, by above-mentioned technical characteristic or its equivalent feature into
Row any combination and the other technical solutions formed.Such as features described above and (but being not limited to) disclosed herein have it is similar
The technical characteristic of function is replaced mutually and the technical solution that is formed.
Claims (11)
1. a kind of equipment for the leakproofness for detecting workpiece characterized by comprising
For accommodating the workpiece, and seal member can be arranged with will be described close in the excircle of the workpiece in sealing container
Sealing vessel isolation is the first sealing space and the second sealing space；
Capillary, one end are connected to by sealing pipeline with second sealing space, and the other end protrudes into the container for accommodating liquid；
And
Determining section is sealed, after inflating to first sealing space, the sealing determining section is according to the hair in the capillary
Thin fluid change determines the leakproofness grade of the workpiece.
2. equipment according to claim 1, which is characterized in that the sealing determining section includes:
Camera, for dynamically capturing the image information of the capillary fluid change；And
Processor obtains described image information, and the leakproofness grade of the workpiece is determined according to described image information.
3. equipment according to claim 1, which is characterized in that the sealing container is with top cover labyrinth and lower sealing cover
It is formed, wherein the top cover labyrinth has the air inlet inflated to first sealing space.
4. equipment according to claim 3, which is characterized in that the lower sealing cover includes:
Shell has hollow structure, and is formed with the gas outlet being connected to second sealing space, and the sealing pipeline is logical
It crosses sealed fitting and is connected to the gas outlet,
Wherein, the supporting element of the shell being partially formed for disposing the workpiece.
5. equipment according to claim 3, which is characterized in that the equipment further include:
Compressing structure provides pressure and the top cover labyrinth and the lower sealing cover is made to cooperatively form the sealing container.
6. equipment according to claim 5, which is characterized in that the equipment further include:
Driving mechanism, for driving the compressing structure close to or far from the sealing container.
7. equipment according to claim 5, which is characterized in that the compressing structure includes:
Installation part is located under the driving mechanism, connect with the driving mechanism；And
Connecting shaft, for connecting the top cover labyrinth and the installation part.
8. equipment according to claim 6, which is characterized in that the driving mechanism is cylinder or linear motor and screw rod
Combined mechanism.
9. equipment according to claim 7, which is characterized in that the top cover labyrinth is fixedly installed to institute by knob plunger
State connecting shaft.
10. a kind of detection method using equipment as claimed in claims 1-9, comprising:
Workpiece is placed in sealing container, and is arranged in the position that the workpiece is contacted with the sealing container inner wall and seals
Component, so that the sealing container is divided into the first sealing space and the second sealing space；
It is inflated by the air inlet of sealing container to first sealing space；And
The leakproofness grade of the workpiece is determined according to the liquid surface of capillarity variation in capillary.
11. detection method according to claim 10, which is characterized in that changed according to the liquid surface of capillarity in capillary and determined
The step of leakproofness grade of the workpiece includes: out
In response to inflating to first sealing space, the variation of the liquid surface of capillarity is captured；
Fluid change speed in the capillary is calculated according to the variation of the liquid surface of capillarity；And
Pass through the leakproofness grade of workpiece described in fluid change velocity estimated calculated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710779808.8A CN109425466A (en) | 2017-09-01 | 2017-09-01 | Detect the equipment and detection method of the leakproofness of workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710779808.8A CN109425466A (en) | 2017-09-01 | 2017-09-01 | Detect the equipment and detection method of the leakproofness of workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109425466A true CN109425466A (en) | 2019-03-05 |
Family
ID=65504939
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710779808.8A Pending CN109425466A (en) | 2017-09-01 | 2017-09-01 | Detect the equipment and detection method of the leakproofness of workpiece |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001091395A (en) * | 1999-09-17 | 2001-04-06 | Denso Corp | Method and device for measuring leakage |
| CN2872339Y (en) * | 2006-02-23 | 2007-02-21 | 吴至一 | Air-tightness tester |
| CN101430235A (en) * | 2008-12-22 | 2009-05-13 | 西华大学 | Rotary high-precision air tightness detection apparatus |
| CN102607780A (en) * | 2012-03-07 | 2012-07-25 | 上海市塑料研究所 | Helium leakage test device and method |
| CN206114223U (en) * | 2016-08-02 | 2017-04-19 | 深圳市金视达光电有限公司 | Waterproof test fixture of camera lens |
-
2017
- 2017-09-01 CN CN201710779808.8A patent/CN109425466A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001091395A (en) * | 1999-09-17 | 2001-04-06 | Denso Corp | Method and device for measuring leakage |
| CN2872339Y (en) * | 2006-02-23 | 2007-02-21 | 吴至一 | Air-tightness tester |
| CN101430235A (en) * | 2008-12-22 | 2009-05-13 | 西华大学 | Rotary high-precision air tightness detection apparatus |
| CN102607780A (en) * | 2012-03-07 | 2012-07-25 | 上海市塑料研究所 | Helium leakage test device and method |
| CN206114223U (en) * | 2016-08-02 | 2017-04-19 | 深圳市金视达光电有限公司 | Waterproof test fixture of camera lens |
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Application publication date: 20190305 |