CN105572562A - Method for detecting position offset of PCBA (printed circuit board assembly) - Google Patents
Method for detecting position offset of PCBA (printed circuit board assembly) Download PDFInfo
- Publication number
- CN105572562A CN105572562A CN201510921692.8A CN201510921692A CN105572562A CN 105572562 A CN105572562 A CN 105572562A CN 201510921692 A CN201510921692 A CN 201510921692A CN 105572562 A CN105572562 A CN 105572562A
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- pcba
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- light collector
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000012937 correction Methods 0.000 claims abstract description 9
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- RVCKCEDKBVEEHL-UHFFFAOYSA-N 2,3,4,5,6-pentachlorobenzyl alcohol Chemical group OCC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl RVCKCEDKBVEEHL-UHFFFAOYSA-N 0.000 claims description 30
- 230000008054 signal transmission Effects 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/281—Specific types of tests or tests for a specific type of fault, e.g. thermal mapping, shorts testing
- G01R31/2813—Checking the presence, location, orientation or value, e.g. resistance, of components or conductors
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a method for detecting position offset of a PCBA (printed circuit board assembly), which comprises the following steps: point light source and light collector are integrated on PCBA, photosensitive pieces or reflecting pieces with proper sizes are pasted on corresponding positions of the inner wall of the case, point light source light is reflected by the photosensitive pieces or reflecting pieces, absorbed by the light collector and converted into electric signals to be transmitted to a system management chip; when the PCBA is displaced, the relative position of the PCBA and the case is changed, light reflected by the photosensitive sheet or the reflective sheet is changed, when the light received by the light collector is changed, the resistance value of the internal resistor is changed, and the generated electric signal is also changed, at the moment, the system management chip judges that the PCBA is displaced according to a preset program, and the alarm device reminds a user of correction; when the correction is finished, the light quantity absorbed by the light collector is a normal quantity, and the management chip can not generate a prompt. The invention can correct the position offset without the need of starting the box to check at any time, thereby not only improving the correction efficiency, but also playing the role of monitoring the displacement of the component.
Description
Technical field
The present invention relates to server and PC hardware, specifically a kind of method for detecting the skew of PCBA position.
Background technology
After server and PC have been produced, need to debug through manufacturer internal, encapsulation shipment, material transportation, many processes such as sale, installation, use, maintenance, and especially transport in this process, carry, server and PC are collided, impact, shake in fixing link, the probability that falls is very high, severe patient can make server and PC inner PCBA---particularly with the PCBA that plug-in mounting mode is installed---be connected loosening, and position is moved; Even if in use, also PCBA shift in position can be caused because of many reasons, cause PCBA and cabinet or be close to formation mechanism between board interfering, therefore when making PCBA displacement run up to a certain degree because of outside or inside reason, when causing mechanical interferences, can work the mischief to the duty of PCBA and life-span, affect PCBA performance, and then affect properties of product and customer satisfaction.
Existing disclosed Patents file: name is called " location compensation method of a kind of novel single vision camera contraposition PCB ", this document disclose " the positioning compensation detection method of a kind of novel CCD one camera contraposition PCB, it is mainly located for PCB, the center of the monumented point of application CCD camera testing product, send detection data to computer PC, utilize CAS auxiliary para bucking-out system (CCDAlignmentsystem) to the potential difference between both detected image calculating, and record corresponding testing result, thus obtain position off-set value, result is transferred to the computing machine connecting laser controller, make position auto-compensation and correct marking.Compared with existing PCB location technology, the present invention has low cost, easy to use, precision advantages of higher, and supports the most of laser in market, can add this device on common board, provides possibility to consumer product upgrading and application upgrade ".
Patent name is " method in detection PCB back drill hole and PCB are in making sheet ", this document disclose " a kind of detect PCB back drill hole method and PCB in making sheet; comprising: in the process forming multi-layer PCB; on the metal level of first internal layer of described PCB, form according to the position in back drill hole the becket that external diameter is greater than the aperture in described back drill hole; At the correspondence position in described back drill hole, make the metal aperture of described becket on and the first internal layer outer through described PCB; Form two the first detect aperture conducted with described becket; Make on the pcb through and expand the described back drill hole of described metal aperture; Detect the circuit turn-on between two described first detect aperture, to determine between described back drill hole and described metal aperture, whether location offsets.Testing process of the present invention does not destroy PCB, not affecting the normal use of PCB, reducing the cost for detecting after detection ".
Above-mentioned disclosed prior art, all effectively can not solve the technical matters detecting the skew of PCBA position.
Summary of the invention
Technical assignment of the present invention is to provide a kind of method for detecting the skew of PCBA position.
Technical assignment of the present invention realizes in the following manner, the method step is as follows: by pointolite and light collector integrated PCB A, the sensitive film of suitable size or reflecting piece are pasted the correspondence position of cabinet inwall, point light source light-emitting is through sensitive film or reflecting piece reflection, absorbed by light collector, be converted into electric signal transmission to system managing chip; When PCBA produces displacement, itself and the change of cabinet relative position, the light change of sensitive film or reflecting piece reflection, when the light that light collector receives changes, the resistance of internal resistance changes, and the electric signal produced also can change, now system managing chip judges PCBA shift in position according to pre-set programs, and warning device reminds user to revise; When correction is complete, the light quantity that light collector absorbs is normal amount, then managing chip can not produce prompting.
Described warning device is warning lamp, screen alarm signal or hummer.
Described resistance is photoresistance.
Compared to the prior art a kind of method for detecting the skew of PCBA position of the present invention, has following characteristics:
1) PCBA position skew, is not needed moment start case to check, is monitored and point out when this carries out biased correction by the signal feedback of biased detecting device.
2) sensitive film is attached on cabinet inwall, can oppositely use monitoring machine box-shaped to become; Sensitive film also can be attached on favorably situated parts, can play the function of monitoring component displacement.
3) input voltage of pointolite will be the input voltage of general PCBA, then protected PCBA does not need to increase new power source design, and that is any board can realize this defencive function.
4) can the reliability of improving product and user satisfaction.
Embodiment
Embodiment 1:
This is as follows for the method step detecting the skew of PCBA position: by pointolite and light collector integrated PCB A, the sensitive film of suitable size is pasted the correspondence position of cabinet inwall, point light source light-emitting reflects through sensitive film, absorbed by light collector, be converted into electric signal transmission to system managing chip; When PCBA produces displacement, itself and the change of cabinet relative position, the light change of sensitive film reflection, when the light that light collector receives changes, the resistance of inner photoresistance changes, and the electric signal produced also can change, now system managing chip judges PCBA shift in position according to pre-set programs, and warning lamp reminds user to revise; When correction is complete, the light quantity that light collector absorbs is normal amount, then managing chip can not produce prompting.
Embodiment 2:
This is as follows for the method step detecting the skew of PCBA position: by pointolite and light collector integrated PCB A, the reflecting piece of suitable size is pasted the correspondence position of cabinet inwall, point light source light-emitting reflects through reflecting piece, absorbed by light collector, be converted into electric signal transmission to system managing chip; When PCBA produces displacement, itself and the change of cabinet relative position, the light change of reflecting piece reflection, when the light that light collector receives changes, the resistance of inner photoresistance changes, and the electric signal produced also can change, now system managing chip judges PCBA shift in position according to pre-set programs, and screen alarm signal reminds user to revise; When correction is complete, the light quantity that light collector absorbs is normal amount, then managing chip can not produce prompting.
Embodiment 3:
This is as follows for the method step detecting the skew of PCBA position: by pointolite and light collector integrated PCB A, the sensitive film of suitable size is pasted the correspondence position of cabinet inwall, point light source light-emitting reflects through sensitive film, absorbed by light collector, be converted into electric signal transmission to system managing chip; When PCBA produces displacement, itself and the change of cabinet relative position, the light change of sensitive film reflection, when the light that light collector receives changes, the resistance of inner photoresistance changes, and the electric signal produced also can change, now system managing chip judges PCBA shift in position according to pre-set programs, and hummer reminds user to revise; When correction is complete, the light quantity that light collector absorbs is normal amount, then managing chip can not produce prompting.
By embodiment above, described those skilled in the art can be easy to realize the present invention.But should be appreciated that the present invention is not limited to above-mentioned several embodiments.On the basis of disclosed embodiment, described those skilled in the art can the different technical characteristic of combination in any, thus realizes different technical schemes.
Claims (3)
1. one kind for detect PCBA position skew method, it is characterized in that, the method step is as follows: by pointolite and light collector integrated PCB A, the sensitive film of suitable size or reflecting piece are pasted the correspondence position of cabinet inwall, point light source light-emitting is through sensitive film or reflecting piece reflection, absorbed by light collector, be converted into electric signal transmission to system managing chip; When PCBA produces displacement, itself and the change of cabinet relative position, the light change of sensitive film or reflecting piece reflection, when the light that light collector receives changes, the resistance of internal resistance changes, and the electric signal produced also can change, now system managing chip judges PCBA shift in position according to pre-set programs, and warning device reminds user to revise; When correction is complete, the light quantity that light collector absorbs is normal amount, then managing chip can not produce prompting.
2. a kind of method for detecting the skew of PCBA position according to claim 1, it is characterized in that, described warning device is warning lamp, screen alarm signal or hummer.
3. a kind of method for detecting the skew of PCBA position according to claim 1, it is characterized in that, described resistance is photoresistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510921692.8A CN105572562A (en) | 2015-12-14 | 2015-12-14 | Method for detecting position offset of PCBA (printed circuit board assembly) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510921692.8A CN105572562A (en) | 2015-12-14 | 2015-12-14 | Method for detecting position offset of PCBA (printed circuit board assembly) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105572562A true CN105572562A (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510921692.8A Pending CN105572562A (en) | 2015-12-14 | 2015-12-14 | Method for detecting position offset of PCBA (printed circuit board assembly) |
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| Country | Link |
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| CN (1) | CN105572562A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108955528A (en) * | 2018-08-07 | 2018-12-07 | 深圳市明信测试设备有限公司 | A kind of test method using photoelectric sensor detection PCBA |
| CN110030933A (en) * | 2019-05-28 | 2019-07-19 | 杭州琼网计算机网络有限公司 | Optical centering deviation detection device based on change in resistance principle |
| CN110823095A (en) * | 2019-11-19 | 2020-02-21 | 深圳市明信测试设备有限公司 | Test fixture and test method for detecting PCBA (printed Circuit Board Assembly) by utilizing infrared correlation |
| CN111722087A (en) * | 2020-06-30 | 2020-09-29 | 生益电子股份有限公司 | Back drilling deviation test board and test method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2779514Y (en) * | 2004-09-27 | 2006-05-10 | 刘珉恺 | Apparatus for determining alarms of moving objects according to their position |
| CN1873419A (en) * | 2005-06-03 | 2006-12-06 | 西安美太信息有限公司 | Method and device for designing sensor for detecting direction of infrared moving target |
| CN101631437A (en) * | 2008-07-15 | 2010-01-20 | 明泰科技股份有限公司 | Shell of electronic device |
| CN102865815A (en) * | 2012-09-24 | 2013-01-09 | 上海功源电子科技有限公司 | Novel positioning compensation method for PCB by single vision camera |
-
2015
- 2015-12-14 CN CN201510921692.8A patent/CN105572562A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2779514Y (en) * | 2004-09-27 | 2006-05-10 | 刘珉恺 | Apparatus for determining alarms of moving objects according to their position |
| CN1873419A (en) * | 2005-06-03 | 2006-12-06 | 西安美太信息有限公司 | Method and device for designing sensor for detecting direction of infrared moving target |
| CN101631437A (en) * | 2008-07-15 | 2010-01-20 | 明泰科技股份有限公司 | Shell of electronic device |
| CN102865815A (en) * | 2012-09-24 | 2013-01-09 | 上海功源电子科技有限公司 | Novel positioning compensation method for PCB by single vision camera |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108955528A (en) * | 2018-08-07 | 2018-12-07 | 深圳市明信测试设备有限公司 | A kind of test method using photoelectric sensor detection PCBA |
| CN110030933A (en) * | 2019-05-28 | 2019-07-19 | 杭州琼网计算机网络有限公司 | Optical centering deviation detection device based on change in resistance principle |
| CN110030933B (en) * | 2019-05-28 | 2020-04-28 | 杭州琼网计算机网络有限公司 | Optical centering deviation detection device based on resistivity change principle |
| CN110823095A (en) * | 2019-11-19 | 2020-02-21 | 深圳市明信测试设备有限公司 | Test fixture and test method for detecting PCBA (printed Circuit Board Assembly) by utilizing infrared correlation |
| CN111722087A (en) * | 2020-06-30 | 2020-09-29 | 生益电子股份有限公司 | Back drilling deviation test board and test method |
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Application publication date: 20160511 |
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