CN103018161A - Zirconium element micro-crack detection device and method for oxygen sensor - Google Patents
Zirconium element micro-crack detection device and method for oxygen sensor Download PDFInfo
- Publication number
- CN103018161A CN103018161A CN2013100125002A CN201310012500A CN103018161A CN 103018161 A CN103018161 A CN 103018161A CN 2013100125002 A CN2013100125002 A CN 2013100125002A CN 201310012500 A CN201310012500 A CN 201310012500A CN 103018161 A CN103018161 A CN 103018161A
- Authority
- CN
- China
- Prior art keywords
- pressure
- channel
- zirconium element
- stop valve
- table surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229910052726 zirconium Inorganic materials 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000001514 detection method Methods 0.000 title claims abstract description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title abstract description 4
- 239000001301 oxygen Substances 0.000 title abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 title abstract description 4
- 238000012856 packing Methods 0.000 claims description 12
- 230000003139 buffering effect Effects 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 8
- 239000007789 gas Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000012216 screening Methods 0.000 abstract description 3
- 238000003860 storage Methods 0.000 abstract 3
- 238000003825 pressing Methods 0.000 abstract 1
- 238000005070 sampling Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 230000002950 deficient Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Images
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a zirconium element micro-crack detection device and method for an oxygen sensor. The zirconium element micro-crack detection device comprises an operating platform, and a pressing device arranged on the operating platform, wherein a sealing gasket is arranged on the operating platform; the operating platform is used for connecting a concave hole of a zirconium element to be detected with a gas storage device through a second channel; an exhaust valve is arranged on the second channel; a high-pressure stop valve is arranged on the second channel between the exhaust valve and the gas storage device; a second pressure sensor is arranged on the gas storage device; the exhaust valve is closed, and the high-pressure stop valve is opened; a pressure sampling module is used for a first pressure sensor closes the high-pressure stop valve within a set time T after reaching a set pressure P0; and after 1s delay, the exhaust valve is opened, and gas of first volume L1 of the second channel is exhausted and the detection is completed. The whole process is completed within 3-5 seconds; and the method is a rapid and efficient detection method, is capable of meeting the screening function and can be used online in a production line.
Description
Technical field
The present invention relates to a kind of pick-up unit and method of lambda sensor, particularly a kind of lambda sensor zirconium element micro-crack pick-up unit and method.
Background technology
Its main core parts of automotive oxygen sensor are the zirconia ceramics element, after the various functional layers of coating, form sensing element in the shrinkage pool of zirconium element.
Can detect by the electrical property of various experiment tablees to sensor, but the ceramic component that applies in the zirconium element shrinkage pool in sintering and process forms crackle easily and produces cracking, larger crackle can detect by inhaling the experiment such as red, but for wherein fine crack with and the inner pollution impurity that exists, then be difficult to detect.
Therefore, there is defective in prior art, needs further improvement and develops.
Summary of the invention
The purpose of this invention is to provide a kind of apparatus and method that can detect the fine crack on the zirconia ceramics element of automotive oxygen sensor.
To achieve these goals, the present invention adopts following technical scheme:
Lambda sensor comprises operating table surface, is arranged on the hold down gag on the described operating table surface with zirconium element micro-crack pick-up unit, wherein, on the described operating table surface packing washer is set, and described packing washer is used for carrying described tested zirconium element;
Described operating table surface connects accumulator unit with the shrinkage pool of tested zirconium element by second channel, and described accumulator unit connects high-pressure air source;
On the described second channel vent valve is set, on the second channel between described drain tap and the described operating table surface the first pressure transducer is set, on described the first pressure transducer the force samples module is set; On the second channel between described drain tap and the described accumulator unit high pressure stop valve is set;
The second pressure transducer is set on the described accumulator unit;
Described drain tap is closed, and described high pressure stop valve is opened; Described force samples module detects described the first pressure transducer in setting-up time T, reach set pressure P0 after, close described high pressure stop valve; After the time-delay, open described drain tap, discharge the gas of described second channel.
Described pick-up unit wherein, also arranges the boss that is absorbed in the described hold down gag on the described operating table surface, described boss is positioned at around the described packing washer.
Described pick-up unit, wherein, described vent valve connects the second buffering and noise-abatement equipment.
Described pick-up unit, wherein, the first passage at described hold down gag top keeps the pressure in the described first passage consistent with atmospheric pressure by the first buffering and noise-abatement equipment and extraneous UNICOM.
Described pick-up unit, wherein, described second channel inwall channel diameter D should be greater than 4mm less than 8mm.
Lambda sensor is with zirconium element testing methods for tiny crack, whether has micro-crack with the lambda sensor of claim 1 with zirconium element micro-crack pick-up unit detection zirconium element body inside, specifically may further comprise the steps:
Step 1, tested zirconium element is placed on the packing washer of operating table surface, and use described hold down gag that the zirconium element is fixed;
Step 2, drain tap is closed, high pressure stop valve is opened, and the force samples module detects the first pressure transducer in setting-up time T, after reaching set pressure P0, close described high pressure stop valve, at this moment, the volume in the described second channel is the first volume L1;
Step 3, time-delay were opened described drain tap after 1 second, discharged the gas of the first volume L1 of described second channel, and testing process is finished.
Described detection method wherein, also comprises between described step 1 and the step 2: the first passage at described hold down gag top is passed through buffering and noise-abatement equipment and extraneous UNICOM, keep the pressure in the described first passage consistent with atmospheric pressure.
Described detection method, wherein, described setting P0 pressure is at 9 ~ 11MPa; Pressure should be greater than 50 milliseconds less than 100 milliseconds from the zero setting-up time T that reaches set pressure P0.
Described detection method, wherein, the volume of described accumulator unit is the second volume L, and the ratio K1 of the first volume L1 of described second channel, described K1=L/L1; The ratio of the pressure P of described the second pressure transducer and set pressure P0 is K2, described K2=P/P0; K1*K2 is between 100 ~ 200.
Described detection method, wherein, K2=1.1 ~ 1.5, K1=80 ~ 150; When setting-up time T opens high pressure stop valve during less than 50*K3, when setting-up time T closes high pressure stop valve during greater than 100*K4.
Lambda sensor provided by the invention zirconium element micro-crack pick-up unit and method, pass into the gas of set pressure P0 in the tested shrinkage pool of zirconium element by high-pressure air source and second channel, thereby detect described zirconium element body inside and whether have small crackle, whole process will be finished within 3 ~ 5 seconds, it is a kind of detection method rapidly and efficiently, not only can satisfy screening function, and can use online at production line.
Description of drawings
Fig. 1 is the structural representation that lambda sensor of the present invention is used zirconium element micro-crack pick-up unit.
Embodiment
Below in conjunction with preferred embodiment the present invention is described in further details.
Lambda sensor of the present invention as shown in Figure 1, comprises operating table surface 110, is arranged on the hold down gag 120 on the described operating table surface with zirconium element micro-crack pick-up unit; On the described operating table surface 110 packing washer 111 is set, described packing washer 111 is used for carrying described tested zirconium element, the boss that is absorbed in the described hold down gag 120 also is set on the described operating table surface 110, described boss is positioned at around the described packing washer 111, and described boss can prevent that cracked zirconium element fragment flies out in the hold down gag and hurt sb.'s feelings; Described hold down gag 120 is used for fixing described zirconium element.
A first passage 121 with atmosphere UNICOM is opened at described hold down gag 120 tops, described first passage 121 connects the first buffering and noise-abatement equipment 122, described first passage 121 keeps channel inner pressure consistent with atmospheric pressure by described the first buffering and noise-abatement equipment 122 and extraneous UNICOM.
Described operating table surface 110 connects accumulator unit 140 with the shrinkage pool of zirconium element by second channel 130, and described accumulator unit 140 connects high-pressure air source 150.On the described second channel 130 vent valve 131 is set, described vent valve 131 connects the second buffering and noise-abatement equipment 132, the first pressure transducer 133 is set on the second channel 130 between described drain tap 131 and the described operating table surface 110, on described the first pressure transducer force samples module 134 is set; On the second channel 130 between described drain tap 131 and the described accumulator unit 140 high pressure stop valve 135 is set.The second pressure transducer 141 is set on the described accumulator unit 140.
Described lambda sensor zirconium element testing methods for tiny crack specifically may further comprise the steps:
Step 1, tested zirconium element is placed on the packing washer 111 of described operating table surface 110, and use described hold down gag 120 that the zirconium element is fixed.
The first passage 121 at step 2, described hold down gag 120 tops keeps the pressure in the described first passage 121 consistent with atmospheric pressure by the first buffering and noise-abatement equipment 122 and extraneous UNICOM.
Step 3, described drain tap 131 is closed, described high pressure stop valve 135 is opened.Described force samples module 134 detects described the first pressure transducer 133 in setting-up time T, reach set pressure P0 after, close described high pressure stop valve 135.At this moment, the volume in the described second channel 130 is the first volume L1.
Step 4, time-delay were opened described drain tap 131 after 1 second, discharged the gas of the first volume L1 of described second channel 130, and testing process is finished.
When step 5, described hold down gag 120 are " zero " at perception the first pressure transducer 133 pressure, lift described hold down gag 120, can take out tested zirconium element.
Preferably, in order to guarantee quick air inlet, described second channel 130 inwall channel diameter D should consider that the zirconium component size is less at least greater than 4mm, and its inside diameter maximum is not easy to surpass 8mm.
On the described operating table surface 110 start button is set, described start button drives described high pressure stop valve 135.Described high pressure stop valve 135 perceives by described force samples module 134 and to close after the first pressure transducer 133 reaches set pressure P0.In this process, whether the described force samples module 134 on the one hand required detected pressures of perception reaches the requirement of P0 to determine closing of high pressure stop valve 135, on the other hand, require described force samples module 134 record pressure to be increased to the time T of required set pressure P0 from " zero " of beginning, in order effectively to detect unacceptable product, and do not damage normal certified products, need to control set pressure P0 and T, require to set P0 pressure at 9 ~ 11MPa, pressure should be less than 100 milliseconds from the zero setting-up time T that reaches P0, for fear of damaging normal certified products, its T should be greater than 50 milliseconds.
Preferably, the volume of described accumulator unit 140 is the second volume L, and the ratio K1 of the first volume L1 of described second channel 130, described K1=L/L1; The ratio of the pressure P of described the second pressure transducer 141 and set pressure P0 is K2, described K2=P/P0; The present invention requires K1*K2 between 100 ~ 200, preferred K2=1.1 ~ 1.5 wherein, K1=80 ~ 150.The control of testing process of the present invention, driven the break-make realization of described high pressure stop valve 135 by the setting-up time T of described force samples module 134 records, when setting-up time T opens high pressure stop valve during less than 50*K3, when setting-up time T closes high pressure stop valve during greater than 100*K4.
Wherein K3 is for opening the coefficient of high pressure stop valve, should be between 1 ~ 2, and preferred 1.1 ~ 1.2
K4 is the coefficient of closing high pressure stop valve, should be between 0.5 ~ 1, and preferred 0.8 ~ 0.9
For guaranteeing above-mentioned can enforcement, the maximum pressure of described high-pressure air source 150 should be 1.5 times of set pressure P0.
Lambda sensor provided by the invention zirconium element micro-crack pick-up unit and method, pass into the gas of set pressure P0 in the tested shrinkage pool of zirconium element by high-pressure air source 150 and second channel 130, thereby whether the ceramic component that the inwall that detects the tested shrinkage pool of described zirconium element applies exists small crackle, what detect is whether zirconium element body inside exists micro-crack or defective, if there is defective, smash by high pressure, if there is not defective, product is qualified.Whole testing process will be finished within 3 ~ 5 seconds, be a kind of detection method rapidly and efficiently, not only can satisfy screening function, and can use online at production line.
Above content is the explanation to preferred embodiment of the present invention, can help those skilled in the art to understand more fully technical scheme of the present invention.But these embodiment only illustrate, and can not assert that the specific embodiment of the present invention only limits to the explanation of these embodiment.Concerning the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deductions and conversion, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. lambda sensor comprises operating table surface, is arranged on the hold down gag on the described operating table surface with zirconium element micro-crack pick-up unit, it is characterized in that, on the described operating table surface packing washer is set, described packing washer is used for carrying described tested zirconium element;
Described operating table surface connects accumulator unit with the shrinkage pool of tested zirconium element by second channel, and described accumulator unit connects high-pressure air source;
On the described second channel vent valve is set, on the second channel between described drain tap and the described operating table surface the first pressure transducer is set, on described the first pressure transducer the force samples module is set; On the second channel between described drain tap and the described accumulator unit high pressure stop valve is set;
The second pressure transducer is set on the described accumulator unit;
Described drain tap is closed, and described high pressure stop valve is opened; Described force samples module detects described the first pressure transducer in setting-up time T, reach set pressure P0 after, close described high pressure stop valve; After the time-delay, open described drain tap, discharge the gas of described second channel.
2. pick-up unit according to claim 1 is characterized in that, the boss that is absorbed in the described hold down gag also is set on the described operating table surface, and described boss is positioned at around the described packing washer.
3. pick-up unit according to claim 2 is characterized in that, described vent valve connects the second buffering and noise-abatement equipment.
4. pick-up unit according to claim 3 is characterized in that, the first passage at described hold down gag top keeps the pressure in the described first passage consistent with atmospheric pressure by the first buffering and noise-abatement equipment and extraneous UNICOM.
5. pick-up unit according to claim 4 is characterized in that, described second channel inwall channel diameter D should be greater than 4mm less than 8mm.
6. lambda sensor is with zirconium element testing methods for tiny crack, whether has micro-crack with the lambda sensor of claim 1 with zirconium element micro-crack pick-up unit detection zirconium element body inside, specifically may further comprise the steps:
Step 1, tested zirconium element is placed on the packing washer of operating table surface, and use described hold down gag that the zirconium element is fixed;
Step 2, drain tap is closed, high pressure stop valve is opened, and the force samples module detects the first pressure transducer in setting-up time T, after reaching set pressure P0, close described high pressure stop valve, at this moment, the volume in the described second channel is the first volume L1;
Step 3, time-delay were opened described drain tap after 1 second, discharged the gas of the first volume L1 of described second channel, and testing process is finished.
7. detection method according to claim 6, it is characterized in that, also comprise between described step 1 and the step 2: the first passage at described hold down gag top is passed through buffering and noise-abatement equipment and extraneous UNICOM, keep the pressure in the described first passage consistent with atmospheric pressure.
8. detection method according to claim 7 is characterized in that, described setting P0 pressure is at 9 ~ 11MPa; Pressure should be greater than 50 milliseconds less than 100 milliseconds from the zero setting-up time T that reaches set pressure P0.
9. detection method according to claim 8 is characterized in that, the volume of described accumulator unit is the second volume L, and the ratio K1 of the first volume L1 of described second channel, described K1=L/L1; The ratio of the pressure P of described the second pressure transducer and set pressure P0 is K2, described K2=P/P0; K1*K2 is between 100 ~ 200.
10. detection method according to claim 9 is characterized in that, K2=1.1 ~ 1.5, K1=80 ~ 150; When setting-up time T opens high pressure stop valve during less than 50*K3, when setting-up time T closes high pressure stop valve during greater than 100*K4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310012500.2A CN103018161B (en) | 2013-01-14 | 2013-01-14 | Zirconium element micro-crack detection device and method for oxygen sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310012500.2A CN103018161B (en) | 2013-01-14 | 2013-01-14 | Zirconium element micro-crack detection device and method for oxygen sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103018161A true CN103018161A (en) | 2013-04-03 |
| CN103018161B CN103018161B (en) | 2014-09-03 |
Family
ID=47967015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310012500.2A Active CN103018161B (en) | 2013-01-14 | 2013-01-14 | Zirconium element micro-crack detection device and method for oxygen sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103018161B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105390428A (en) * | 2014-08-25 | 2016-03-09 | 日东电工株式会社 | Method and device for stripping adhesive tape |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09236528A (en) * | 1996-02-29 | 1997-09-09 | Shimadzu Corp | Internal pressure tester |
| CN2328999Y (en) * | 1998-02-25 | 1999-07-14 | 辽河石油勘探局公路工程公司 | Crack detector for engine cylinder tube |
| CN201311337Y (en) * | 2008-06-26 | 2009-09-16 | 上海工业自动化仪表研究所 | Air-tightness check clamper of industrial product |
| CN102445312A (en) * | 2011-10-09 | 2012-05-09 | 北京化工大学 | Testing apparatus for plastic airtightness and method thereof |
-
2013
- 2013-01-14 CN CN201310012500.2A patent/CN103018161B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09236528A (en) * | 1996-02-29 | 1997-09-09 | Shimadzu Corp | Internal pressure tester |
| CN2328999Y (en) * | 1998-02-25 | 1999-07-14 | 辽河石油勘探局公路工程公司 | Crack detector for engine cylinder tube |
| CN201311337Y (en) * | 2008-06-26 | 2009-09-16 | 上海工业自动化仪表研究所 | Air-tightness check clamper of industrial product |
| CN102445312A (en) * | 2011-10-09 | 2012-05-09 | 北京化工大学 | Testing apparatus for plastic airtightness and method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105390428A (en) * | 2014-08-25 | 2016-03-09 | 日东电工株式会社 | Method and device for stripping adhesive tape |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103018161B (en) | 2014-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103916506A (en) | Testing device and audio automatic testing system and method for mobile terminal | |
| CN205538948U (en) | Experimental testing arrangement of dust explosion parameter | |
| WO2011079269A3 (en) | Stack gas measurement device and method therefor | |
| CN104535415B (en) | Biological soft tissue mechanical property test clamping device and method based on vacuum adsorption | |
| CN202994621U (en) | Instrument for testing water resistance and breathability of fabric | |
| CN103604571B (en) | A kind of marking pen leak-testing apparatus | |
| CN103018161B (en) | Zirconium element micro-crack detection device and method for oxygen sensor | |
| CN103439095A (en) | Method and device for automatically testing valve pressure of cell safety valve in open state and in closed state | |
| CN105258975A (en) | Closed insulation oil sampling device and sampling method thereof | |
| CN203002400U (en) | Endocrine sampling inspection test tube | |
| CN105361859A (en) | Grabbing calibration device and calibration sorting method for electric thermometers | |
| CN204286715U (en) | A kind of sealing property testing equipment | |
| CN104729840A (en) | Safety valve testing device and method | |
| CN207704004U (en) | A kind of telephone testing machine | |
| CN104458153A (en) | Sealing performance testing device and method | |
| CN204178621U (en) | Gas sampling training device | |
| CN209131876U (en) | A kind of electrolyte pail pack pressure measuring unit | |
| CN102944506A (en) | Impervious instrument for detecting water-proof materials | |
| CN204556650U (en) | Full-automatic gas keeps sample device | |
| CN203745166U (en) | Pressure testing device for detecting ship valve | |
| CN106500977B (en) | Turbocharger detection test method | |
| CN221123699U (en) | Back adhesive film sheet airtight testing device | |
| CN210923304U (en) | Cover pulling-on piece check out test set | |
| CN205157120U (en) | Air leakage detection device | |
| CN205844016U (en) | For chromatography standard oil sample oil storage bag automatic discharge equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU AIRBLUE AUTOELECTRICS CO., LTD. Free format text: FORMER OWNER: HUANG LONGHUI Effective date: 20140207 |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20140207 Address after: 226000, building 8, 9 Industrial Park, new East Road, Nantong economic and Technological Development Zone, Jiangsu, China Applicant after: JIANGSU AIRBLUE AUTOMOBILE ELECTRONIC CO., LTD. Address before: 226000, Jiangsu, Nantong economic and Technological Development Zone, 9 East Road, 8 Electronic Industrial Park, Jiangsu El Beller Automotive Electronics Co., Ltd. Huang Qiuyu turn Applicant before: Huang Longhui |
|
| TA01 | Transfer of patent application right | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200812 Address after: 215299 south of Lianyang Road, east of Shunfeng Road, Wujiang Economic and Technological Development Zone, Suzhou City, Jiangsu Province Patentee after: SUZHOU AECS AUTOMOTIVE ELECTRONICS Co.,Ltd. Address before: 226000, building 8, 9 Industrial Park, new East Road, Nantong economic and Technological Development Zone, Jiangsu, China Patentee before: JIANGSU AIRBLUE AUTOELECTRICS Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210219 Address after: 226001 No.88 Xinning Road, Chongchuan District, Nantong City, Jiangsu Province Patentee after: Jiangsu aoyikesi Automotive Electronic Technology Co.,Ltd. Address before: 215299 south of Lianyang Road, east of Shunfeng Road, Wujiang Economic and Technological Development Zone, Suzhou City, Jiangsu Province Patentee before: SUZHOU AECS AUTOMOTIVE ELECTRONICS Co.,Ltd. |