CN116973735A - Leakage detection method and device for PCB - Google Patents
Leakage detection method and device for PCB Download PDFInfo
- Publication number
- CN116973735A CN116973735A CN202310999350.2A CN202310999350A CN116973735A CN 116973735 A CN116973735 A CN 116973735A CN 202310999350 A CN202310999350 A CN 202310999350A CN 116973735 A CN116973735 A CN 116973735A
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- pcb
- leakage detection
- detection
- moving block
- spill
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- 238000001514 detection method Methods 0.000 title claims abstract description 75
- 239000000523 sample Substances 0.000 claims abstract description 22
- 238000004458 analytical method Methods 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 claims description 4
- 230000003028 elevating effect Effects 0.000 claims description 3
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
-
- 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]
- G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model provides a leakage detection method of a PCB, which comprises the steps of importing a file, importing a PCB electronic file into PCB manufacturability analysis software; file analysis, DFM analysis is carried out, and interval information among pins of the PCB circuit is analyzed; the utility model provides a leak detection, with in the leading-in leak detection equipment of distance information, leak detection equipment drives the probe through mobile device according to distance information and carries out pin detection and a leak detection equipment one by one for solve the pin of circuit board and can be according to the change of PCB panel, its position also can change, consequently the PCB circuit board specification that above-mentioned prior art used need cooperate with the probe completely, the technical problem that application scope is narrower.
Description
Technical Field
The utility model mainly relates to the technical field of leakage detection, in particular to a method and equipment for detecting leakage of a PCB.
Background
A PCB, a printed wiring board, is one of the important components of the electronics industry. Almost every electronic device, as small as an electronic watch, a calculator, as large as a computer, a communication electronic device, a military weapon system, has only electronic components such as an integrated circuit, and a printed board is used for electrically interconnecting the respective components. The printed circuit board consists of an insulating base plate, connecting wires and bonding pads for assembling and welding electronic elements, and has the dual functions of a conductive circuit and the insulating base plate. The wiring device can replace complex wiring, realizes electric connection among elements in a circuit, simplifies assembly and welding work of electronic products, reduces wiring workload in a traditional mode, and greatly lightens labor intensity of workers; and the whole volume is reduced, the product cost is reduced, and the quality and the reliability of the electronic equipment are improved. The printed circuit board has good product consistency, can adopt standardized design, and is favorable for realizing mechanization and automation in the production process.
However, in the process of using the PCB board, due to the problem of the manufacturing process or the influence of the external environment on the PCB board, the leakage phenomenon is easy to occur, and some leakage phenomenon may not affect the overall function of the circuit for a period of time, but the damage of the PCB board caused by the increased power consumption and heat generation later is also required, so that after the production and the manufacturing are completed or the PCB board fails, the leakage detection needs to be performed on the PCB board.
For example, a leakage detection device for detecting high current of a PCB board, which is disclosed in patent number CN202121390922.X, comprises a detection component and a moving component; the top of the detection component is provided with a moving component; the detection assembly comprises a base, a placing groove, a fixed plate, a detection probe, a limiting plate, a limiting rod, a top plate, a controller, a limiting hole, a cavity and a circuit board; the utility model drives the fixed plate to move downwards by rotating the threaded rod, thereby enabling the detection probes to contact pins of the electronic element, and detecting electric leakage of the PCB.
During the operation of the specific examples, the inventors have found the following drawbacks:
in the prior art represented by the above patent, the principle is that the detection probe at the bottom is contacted with the pin for detection, firstly, the pin of the circuit board is changed according to the change of the PCB board, and the position of the pin is also changed, so that the PCB board used in the prior art needs to be completely matched with the probe, and the application range is narrower.
The above-described contents are within the technical knowledge of the inventors, and the technical contents in the art are huge and complicated, and thus the above-described contents of the present utility model do not necessarily constitute the prior art.
Disclosure of Invention
1. Technical problem to be solved by the utility model
The utility model provides a method and equipment for detecting electric leakage of a PCB (printed Circuit Board) to solve the technical problems in the background technology.
2. Technical proposal
In order to achieve the above purpose, the technical scheme provided by the utility model is as follows: a leakage detection method for PCB comprises
File importing, namely importing the PCB electronic file into PCB manufacturability analysis software;
file analysis, DFM analysis is carried out, and interval information among pins of the PCB circuit is analyzed;
the device can be used for manufacturing detection and fault detection of a PCB circuit board, can be used for leading PCB electronic files into PCB manufacturability analysis software to identify internal information after the PCB electronic files are designed, can be used for detecting faults of the existing PCB board after subsequent production, can be used for reading out the distance information in the PCB circuit board for detection in a photo taking mode, and can be used for synchronizing marks on a computer for facilitating subsequent maintenance detection.
Further, the PCB electronic file is a PCB layout diagram.
Further, the PCB electronic file is a high-definition shot picture
And the utility model provides an electric leakage detection equipment of PCB board, includes the workstation, the workstation top is equipped with the spill and washs the pond, be equipped with the lifting clamp plate in the spill washs the pond, the workstation top passes through elevating gear and connects the detection frame, be equipped with lateral shifting equipment in the detection frame, the lateral shifting equipment bottom is equipped with the detection probe, longitudinal shifting equipment is connected at the lateral shifting equipment top, the longitudinal shifting equipment side is equipped with control computer, and this equipment can rent on to the PCB board according to seeing the pin information that control computer read and detect, and the during operation is placed PVB panel on the lifting clamp plate, and the lifting clamp plate lifts up the back, and lateral shifting equipment cooperates the detection probe of longitudinal shifting equipment drive bottom to examine the pin one by one.
Further, the concave cleaning pool is a PCB ultrasonic cleaning pool.
Further, the lifting clamp plate comprises a lifting column, the bottom of the lifting column is connected with the concave cleaning pool, the top of the lifting column is connected with a placing plate, the top of the placing plate is provided with a sliding groove, the sliding groove is connected with a concave moving block in a matching mode, one side of the middle of the concave moving block is connected with a clamping plate, the side face of the clamping plate is provided with a clamping groove, the top of the clamping groove is connected with a spring, the bottom of the spring is connected with a locking plate, the bottom of the concave moving block is connected with a positioning block, and a positioning hole is formed in the positioning block.
Further, the top of the detection frame is connected with a plurality of blowing fans.
Further, the transverse moving device comprises a first moving block, a first rotating screw rod is arranged at the bottom of the first moving block and connected with a second moving block, and the bottom of the second moving block is provided with the detection probe.
Further, the longitudinal moving device comprises an L-shaped supporting block, the side face of the L-shaped supporting block is connected with the detection frame, a second rotating screw rod is arranged at the bottom of the L-shaped supporting block, and the second rotating screw rod is connected with the first moving block in a matching mode.
Furthermore, the side face of the detection probe is provided with an identification camera.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:
the utility model has reasonable design, can input the design drawing or the high-definition shooting drawing of the PCB into the computer controller, and then can transmit the position information of the pins into the leakage detection equipment, the leakage detection equipment controls the probes at the bottom to detect gradually, and the whole process is highly automatic and has high detection precision.
It should be noted that, the structure not described in the present utility model does not relate to the design gist and the improvement direction of the present utility model, which are the same as the prior art or can be implemented by using the prior art, and the description is omitted herein.
Drawings
FIG. 1 is a schematic flow chart of the method of the present utility model;
FIG. 2 is a schematic view of the structure of the leakage detecting apparatus according to the present utility model;
FIG. 3 is a schematic view of a concave cleaning basin according to the present utility model;
FIG. 4 is a schematic view of another angle structure of the leakage detecting apparatus according to the present utility model;
FIG. 5 is a schematic diagram of a portion of the leakage detection apparatus according to the present utility model;
fig. 6 is an enlarged schematic view of the structure of fig. 5 a according to the present utility model.
Reference numerals
1. A work table; 2. a concave cleaning pool; 3. lifting splints; 31. lifting columns; 32. placing a plate; 33. a sliding groove; 34. a concave moving block; 35. a clamping plate; 36. clamping grooves; 37. a spring; 38. a locking plate; 39. positioning holes; 4. a lifting device; 5. a detection frame; 51. a blowing fan; 6. a lateral movement device; 61. a first moving block; 62. a first rotating screw; 63. a second moving block; 64. identifying a camera; 7. detecting a probe; 8. a control computer; 9. a longitudinal movement device; 91. an L-shaped support block; 92. and a second rotating screw rod.
Detailed Description
In order that the utility model may be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which, however, the utility model may be embodied in many different forms and are not limited to the embodiments described herein, but are instead provided for the purpose of providing a more thorough and complete disclosure of the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," "provided," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Examples
Referring to fig. 1-6, a leakage detection method of a PCB board includes
File importing, namely importing the PCB electronic file into PCB manufacturability analysis software;
file analysis, DFM analysis is carried out, and interval information among pins of the PCB circuit is analyzed;
the device can be used for manufacturing detection and fault detection of a PCB circuit board, can be used for leading PCB electronic files into PCB manufacturability analysis software to identify internal information after the PCB electronic files are designed, can be used for detecting faults of the existing PCB board after subsequent production, can be used for reading out the distance information in the PCB circuit board for detection in a photo taking mode, and can be used for synchronizing marks on a computer for facilitating subsequent maintenance detection.
The PCB electronic file is a PCB layout diagram, electronic data in PCB circuit board design can be directly imported, and Hua Qiu DFM and other relevant software can be adopted.
The PCB electronic file is a high-definition shot picture, and the shot high-definition picture can be imported to a PCB circuit board without electronic data, and the PCB circuit board is detected after pin marking and distance analysis.
And, a leakage detection equipment of PCB board, including workstation 1, workstation 1 top is equipped with spill washs pond 2, be equipped with lifting clamp plate 3 in the spill washs pond 2, workstation 1 top passes through elevating gear 4 and connects detection frame 5, be equipped with lateral shifting device 6 in the detection frame 5, lateral shifting device 6 bottom is equipped with detection probe 7, longitudinal shifting device 9 is connected at lateral shifting device 6 top, longitudinal shifting device 9 side is equipped with control computer 8, and this equipment can rent the piece on to the PCB board according to seeing the pin information that control computer 8 read and detect, and the during operation is placed PVB panel on lifting clamp plate 3, and lifting clamp plate 3 lifts up the back, and lateral shifting device 6 cooperates the detection probe 7 of longitudinal shifting device 9 drive bottom to examine the pin one by one.
The concave cleaning tank 2 is a PCB ultrasonic cleaning tank, and can be cleaned before PCB detection, so that the influence of impurities is eliminated, and the detection precision is improved.
The lifting clamp plate 3 comprises a lifting column 31, the bottom of the lifting column 31 is connected with the concave cleaning pool 2, the top of the lifting column 31 is connected with a placing plate 32, the top of the placing plate 32 is provided with a sliding groove 33, the sliding groove 33 is connected with a concave moving block 34 in a matching mode, one side of the middle of the concave moving block 34 is connected with a clamping plate 35, the side face of the clamping plate 35 is provided with a clamping groove 36, the top of the clamping groove 36 is connected with a spring 37, the bottom of the spring 37 is connected with a locking plate 38, the bottom of the concave moving block 34 is connected with a positioning block, the positioning block is provided with a positioning hole 39, the lifting column 31 can drive the placing plate 32 at the top to be lifted upwards, a PCB (printed circuit board) is required to be prevented from being cleaned in the clamping plate 35 after the lifting plate 32 is cleaned, the positioning hole 39 can be connected with a positioning screw to position the concave moving block 34, and the PCB can be prevented from being clamped by the locking plate 38 in the clamping groove 36.
The top of the detection frame 5 is connected with a plurality of blowing fans 51, and the blowing fans 51 are used for drying the PCB with the cleaned bottom, so that the subsequent detection operation is facilitated.
The lateral movement device 6 comprises a first moving block 61, a first rotating screw rod 62 is arranged at the bottom of the first moving block 61, the first rotating screw rod 62 is connected with a second moving block 63, the bottom of the second moving block 63 is provided with the detection probe 7, and the first rotating screw rod 62 can drive the second moving block 63 to move laterally so as to drive the detection probe 7 to move laterally.
The longitudinal moving device 9 comprises an L-shaped supporting block 91, the side surface of the L-shaped supporting block 91 is connected with the detection frame 5, a second rotating screw rod 92 is arranged at the bottom of the L-shaped supporting block 91, the second rotating screw rod 92 is connected with the first moving block 61 in a matching manner, and the second rotating screw rod 92 can drive the first moving block 61 to move longitudinally, so that the detection probe 7 can move longitudinally.
The electrical leakage detection apparatus of claim 8, wherein: the detection probe 7 side is equipped with discernment camera 64, thereby discernment camera 64 can discern the pin position information in the PCB electronic file and the picture contrast of taking in real time improves the accuracy of detection.
The foregoing examples merely illustrate certain embodiments of the utility model and are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that it is possible for a person skilled in the art to make several variants and modifications without departing from the concept of the utility model, all of which fall within the scope of protection of the utility model; accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. The utility model provides a leakage detection method of PCB board which characterized in that: comprising
File importing, namely importing the PCB electronic file into PCB manufacturability analysis software;
file analysis, DFM analysis is carried out, and interval information among pins of the PCB circuit is analyzed;
and (3) electric leakage detection, namely leading the distance information into electric leakage detection equipment, and driving the probes to detect pins one by the electric leakage detection equipment through a moving device according to the distance information.
2. The method for detecting electric leakage of a PCB according to claim 1, wherein: the PCB electronic file is a PCB layout diagram.
3. The method for detecting electric leakage of a PCB according to claim 1, wherein: and the PCB electronic file is a high-definition shot picture.
4. An electric leakage check out test set of PCB board, its characterized in that: including workstation (1), workstation (1) top is equipped with spill washs pond (2), be equipped with lifting clamp plate (3) in spill washs pond (2), detection frame (5) are connected through elevating gear (4) at workstation (1) top, be equipped with lateral shifting device (6) in detection frame (5), lateral shifting device (6) bottom is equipped with detection probe (7), longitudinal shifting device (9) are connected at lateral shifting device (6) top, longitudinal shifting device (9) side is equipped with control computer (8).
5. The electrical leakage detection apparatus for a PCB board according to claim 4, wherein: the concave cleaning pool (2) is a PCB ultrasonic cleaning pool.
6. The electrical leakage detection apparatus for a PCB board according to claim 4, wherein: lifting clamp plate (3) are including lifting column (31), lifting column (31) bottom is connected spill washs pond (2), lifting column (31) top is connected and is placed board (32), place board (32) top and open and have sliding tray (33), sliding tray (33) matchedly connect spill movable block (34), clamping plate (35) are connected to spill movable block (34) middle part one side, clamping plate (35) side is opened there is clamping groove (36), clamping groove (36) top connection spring (37), locking plate (38) are connected to spring (37) bottom, locating piece is connected to spill movable block (34) bottom, it has locating hole (39) to open on the locating piece.
7. The electrical leakage detection apparatus for a PCB board according to claim 4, wherein: the top of the detection frame (5) is connected with a plurality of blowing fans (51).
8. The electrical leakage detection apparatus for a PCB board according to claim 4, wherein: the transverse moving device (6) comprises a first moving block (61), a first rotating screw rod (62) is arranged at the bottom of the first moving block (61), the first rotating screw rod (62) is connected with a second moving block (63), and the bottom of the second moving block (63) is provided with a detection probe (7).
9. The electrical leakage detection apparatus of claim 8, wherein: the longitudinal moving device (9) comprises an L-shaped supporting block (91), the side face of the L-shaped supporting block (91) is connected with the detection frame (5), a second rotating screw rod (92) is arranged at the bottom of the L-shaped supporting block (91), and the second rotating screw rod (92) is connected with the first moving block (61) in a matching mode.
10. The electrical leakage detection apparatus of claim 8, wherein: an identification camera (64) is arranged on the side face of the detection probe (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310999350.2A CN116973735A (en) | 2023-08-09 | 2023-08-09 | Leakage detection method and device for PCB |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310999350.2A CN116973735A (en) | 2023-08-09 | 2023-08-09 | Leakage detection method and device for PCB |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116973735A true CN116973735A (en) | 2023-10-31 |
Family
ID=88479478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310999350.2A Withdrawn CN116973735A (en) | 2023-08-09 | 2023-08-09 | Leakage detection method and device for PCB |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116973735A (en) |
-
2023
- 2023-08-09 CN CN202310999350.2A patent/CN116973735A/en not_active Withdrawn
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20231031 |