CN110988659A - Identification point and identification method for circuit board V-CUT - Google Patents
Identification point and identification method for circuit board V-CUT Download PDFInfo
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- CN110988659A CN110988659A CN201911422534.2A CN201911422534A CN110988659A CN 110988659 A CN110988659 A CN 110988659A CN 201911422534 A CN201911422534 A CN 201911422534A CN 110988659 A CN110988659 A CN 110988659A
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- 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
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Abstract
The invention relates to the technical field of circuit board detection, and provides a method for identifying a circuit board V-CUT, which aims to solve the problem that the detection is easy to miss due to the adoption of a manual detection mode when the V-CUT cutting condition on the circuit board is detected at present, and comprises the following steps of: marking a test lead on a circuit board to be detected, wherein the test lead comprises a test line and test points at two ends of the test line, and the test lead passes through a preset V-CUT position; a placing step: placing the marked circuit board on a detection mechanism; the detection mechanism comprises a detection circuit, a drive plate and a placing plate, wherein two ends of the detection circuit are respectively provided with a conductive detection piece, and the detection circuit also comprises an alarm module used for sending an alarm when the detection circuit is switched on; a detection step: after the circuit board is placed on the placing board, the testing point is contacted with the testing piece; and if the circuit line is not connected with the V-CUT, the alarm module sends an alarm. The invention can avoid the condition of missing detection and improve the yield of the circuit board.
Description
Technical Field
The invention relates to the technical field of circuit board detection, in particular to an identification point and an identification method for a circuit board V-CUT.
Background
The circuit board can be called as a printed circuit board or a printed circuit board, and the circuit board enables the circuit to be miniaturized and visualized, and plays an important role in mass production of fixed circuits and optimization of electric appliance layout. After the circuit board is formed, a manufacturer needs to CUT a dividing line at a specific position of the circuit board in advance by using a turntable cutter according to the drawing requirements of a customer, namely, V-CUT operation, and the purpose is to facilitate board separation (De-panel) after the subsequent SMT circuit board assembly is completed. Therefore, in order to improve the yield of the circuit board, after the V-CUT is finished, the V-CUT needs to be checked, and the condition of V-CUT leakage is discovered and reworked, so that the condition of V-CUT leakage is avoided.
However, at present, the V-CUT condition is usually tested by manual visual inspection. Therefore, on the one hand, the probability of missed detection and false detection is high, and on the other hand, the rework rate caused by missed detection and false detection is increased, so that the workload of workers is increased to a great extent, the production efficiency of the circuit board is reduced, and the quality of the circuit board cannot be guaranteed.
Disclosure of Invention
The invention aims to provide a method for identifying a circuit board V-CUT, which aims to solve the problem that detection omission easily occurs when a manual detection mode is adopted for detecting the V-CUT cutting condition on the circuit board at present.
The invention provides a basic scheme that: the identification method for the circuit board V-CUT comprises the following steps,
marking: marking a test lead on a circuit board to be detected, wherein the test lead comprises a test line and test points at two ends of the test line, and the test lead passes through a preset V-CUT position;
a placing step: placing the marked circuit board on a detection mechanism; the detection mechanism comprises a detection circuit, a drive plate and a placing plate, wherein two ends of the detection circuit are respectively provided with a conductive detection piece, and the detection circuit also comprises an alarm module used for sending an alarm when the detection circuit is switched on; the detection circuit is arranged on the driving plate, the driving plate is connected with the placing plate through the driving rod, and the driving plate can reciprocate up and down along the driving rod;
a detection step: after the circuit board is placed on the placing board, the driving board moves downwards to enable the testing point to be in contact with the testing piece; if the circuit line is not V-CUT, the alarm module sends an alarm.
The basic scheme has the working principle and the beneficial effects that: compared with the existing inspection mode, the scheme has the advantages that the circuit board is marked by the marking step, the marked circuit board is detected by the detection step after the circuit board is subjected to V-CUT, the test lead is connected into the detection circuit after the test point is contacted with the detection piece, if the circuit board is subjected to V-CUT, the test lead passing through the V-CUT position is excessively CUT in the V-CUT process, and the detection circuit is not conducted; if the circuit board is not subjected to the V-CUT, the test lead passing through the V-CUT position cannot be CUT off, the detection circuit is conducted at the moment, an alarm is sent, a worker is reminded of reworking the circuit board, automatic detection of the V-CUT condition of the circuit board is achieved through the matching of the detection step and the marking step, the detection effect is improved, the condition of missing detection is avoided, and the yield of the circuit board is improved.
The first preferred scheme is as follows: preferably, in the placing step, the marked circuit board is placed in a limiting groove on the placing board. Has the advantages that: in order to ensure that the detection process is carried out smoothly, the test point on the circuit board is required to be opposite to the detection piece on the detection mechanism, and the worker is required to align the test point with the detection piece of the detection mechanism when putting the circuit board on the placing board.
The preferred scheme II is as follows: preferably, in the detection step, before the driving plate moves down, the safety switch on the driving plate is closed to control the detection circuit to be powered on. Has the advantages that: considering when not using detection mechanism, if detection circuitry is in the on-state always this moment, then probably can make alarm module send the police dispatch newspaper after detection circuitry contacts with other conducting material, therefore in this scheme, when needs use detection mechanism, the safety switch on the closure drive plate earlier for detection circuitry circular telegram is just supplying power to detection circuitry detecting time measuring promptly, avoids alarm module to take place the phenomenon of wrong report police on the one hand, and the waste of power has also been avoided on the other hand.
The preferable scheme is three: preferably, the method further includes a collecting step of pushing the circuit board on the placing board into a collecting box against the placing board after the detecting step is completed. Has the advantages that: in this scheme, set up the collecting box and collect the circuit board through the detection, after the circuit board passes through the detection, can directly push the circuit board to the collecting box on can, easy operation.
The preferable scheme is four: preferably, the method further includes an indication step of lighting an indicator lamp of the detection means when the detection circuit is turned on. Has the advantages that: considering that the sent alarm may not be heard when the surrounding environment is changed to be noisy, the detection mechanism in the scheme also sets an indicator lamp for indication, and when the circuit board detects that the V-CUT does not exist, the indicator lamp is lightened, so that the working personnel are warned, and the warning effect is further ensured.
The preferable scheme is five: preferably, the method further comprises a counting step of counting the number of times of sending the alarm to obtain an alarm statistic. Has the advantages that: in the scheme, a counting step is further arranged for counting the times of sending the alarm, and the obtained counting value also represents the times of reworking, so that management personnel can conveniently evaluate the success rate of the V-CUT process.
The preferable scheme is six: preferably, the method further comprises a storage step of storing a statistical threshold; a comparison step of comparing the obtained alarm statistic value with a statistic threshold value; and a prompting step, namely sending prompting information when the alarm statistic value is larger than the statistic threshold value.
Has the advantages that: in the scheme, when the alarm statistic value is greater than the statistic threshold value, prompt information is sent to remind a manager to check the V-CUT equipment, so that the phenomenon of massive rework is avoided.
The preferable scheme is seven: preferably, the method further comprises a resetting step of resetting the alarm statistic value. Has the advantages that: considering that even if the V-CUT equipment is in a normal state, in the long-term use process, the accumulated alarm times always exceed the statistical threshold value, and in this way, the situation of error prompt is easy to occur.
The preferable scheme is eight: preferably, in the counting step, the number of times of sending the prompt information is counted, a prompt statistic value is generated, and the prompt statistic value is stored in the storing step. Has the advantages that: in the scheme, the times of sending the prompt information are counted, the obtained statistic value indicates the times of overhauling the V-CUT, a manager can know the overhauling frequency of the V-CUT equipment by looking up the prompt statistic value, if the detection frequency is too high, the fact that the fault of the V-CUT equipment can be eliminated and needs to be replaced can be indicated, and therefore the normal operation of the V-CUT operation is guaranteed.
The second basic scheme provided by the invention is used for identifying points of the circuit board V-CUT, such as the test points arranged on the circuit board to be detected in the scheme, wherein the test points are positioned on one side of the preset V-CUT position on the circuit board.
Has the advantages that: through the setting of test points on the circuit board, the automatic detection of the V-CUT condition of the circuit board is realized through the matching of the test step and the marking step, so that the detection effect is improved, the condition of missing detection is avoided, and the yield of the circuit board is improved.
Drawings
FIG. 1 is a front view of an identification system used in a first embodiment of the identification point and identification method for a circuit board V-CUT according to the present invention;
FIG. 2 is a top view of a circuit board according to one embodiment;
FIG. 3 is an enlarged view of FIG. 2 at the test lead;
FIG. 4 is a block diagram of a detection mechanism in an embodiment of the identification point and the identification method for the circuit board V-CUT according to the invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the test device comprises a rack 1, a placing plate 11, a placing groove 110, a driving plate 13, a test piece 15, a safety switch 131, a state indicating module 133, a circuit board 2, a test wire 3, a test wire 33 and a test point 31.
Example one
Essentially as follows: the identification method for the circuit board 2V-CUT comprises the following steps,
marking: marking a test lead 3 on a circuit board to be detected, wherein the test lead 3 comprises a test line 33 and test points 31 at two ends of the test line 33, and the test lead 3 passes through a preset V-CUT position;
a placing step: placing the marked circuit board on a detection mechanism, specifically, placing the marked circuit board in a limiting groove on a placing plate 11; the detection mechanism comprises a detection circuit, a drive plate 13 and a placing plate 11, conductive detection pieces are respectively arranged at two ends of the detection circuit, and the detection circuit further comprises an alarm module used for sending an alarm when the detection circuit is switched on; the detection circuit is arranged on the driving plate 13, the driving plate 13 is connected with the placing plate 11 through the driving rod, and the driving plate 13 can reciprocate up and down along the driving rod;
a detection step: after the circuit board is placed on the placing board 11, the safety switch 131 on the driving board 13 is closed, the detection circuit is controlled to be powered on, and the driving board 13 moves downwards, so that the test point 31 is in contact with the test piece 15; if the circuit line is not V-CUT, the alarm module sends an alarm;
counting, namely counting the times of sending the alarm and obtaining an alarm statistical value; counting the times of sending the prompt information and generating a prompt statistic value;
a storage step, storing a statistical threshold value and storing a prompt statistical value;
a comparison step of comparing the obtained alarm statistic value with a statistic threshold value;
a prompting step, when the alarm statistic value is larger than the statistic threshold value, sending prompting information;
a resetting step of resetting the alarm statistic value.
Based on the identification method, the embodiment also discloses an identification system for the circuit board 2V-CUT, which comprises a marking module, a marking module and a control module, wherein the marking module is used for marking the test lead 3 of the circuit board 2, the test lead 3 comprises a test line 33 and test points 31 at two ends of the test line 33, and the test lead 3 passes through a preset V-CUT position;
the detection mechanism comprises a detection circuit, a drive plate 13, a placing plate 11 and an indicator light, as shown in fig. 1, the drive plate 13 and the placing plate 11 are installed on a rack 1, the placing plate 11 is fixedly arranged on the rack 1, the drive plate 13 slides with the rack 1, an elastic part is arranged between the drive plate 13 and the placing plate 11, the upper end of the elastic part is connected with the lower surface of the drive plate 13, the lower end of the elastic part is connected with the upper surface of the placing plate 11, specifically, the elastic part can adopt a pressure spring, conductive detection parts are respectively arranged at two ends of the detection circuit, the detection parts are metal sheets, the detection circuit further comprises an alarm module for sending an alarm when the detection circuit is switched on, the indicator light is turned on when the detection circuit is switched on, the specific alarm module is a horn, and the indicator light is a red LED lamp bead; the detection circuit is arranged on the driving plate 13, the driving plate 13 is connected with the placing plate 11 through the driving rod, and the driving plate 13 can reciprocate up and down along the driving rod;
as shown in fig. 4, the detection mechanism further includes a counting module, configured to count the number of times of sending an alarm and obtain an alarm statistic;
the storage module stores a statistical threshold;
a comparison module for comparing the alarm statistic with a statistic threshold;
the prompting module is used for sending prompting information when the alarm statistic value is larger than the statistic threshold value;
the resetting module is used for resetting the alarm statistic value;
the counting module is also used for counting the times of sending the prompt information and generating a prompt statistic value, and the storage module stores the prompt statistic value;
the placing plate 11 is provided with a limiting groove; a safety switch 131 for controlling the electrification of the detection circuit is arranged on the side surface of the driving plate 13;
the side of the driving board 13 is further provided with a status indication module 133 for indicating the on-off status of the safety switch 131, when the safety switch 131 is in the on status, the status indication module 133 is started, and the status indication module 133 is a green LED lamp bead in this embodiment.
The specific implementation process is as follows: marking a circuit board 2 to be subjected to V-CUT, placing the position, needing the V-CUT, on the circuit board 2 below a marking module when marking, and marking the circuit board 2 by utilizing the marking module, wherein a marked test lead 3 is shown in figure 2.
After marking is finished, the circuit board 2 which is marked is placed in the placing groove 110 of the placing plate 11, then the safety switch 131 is closed, the state indicating module 133 is started, the detection circuit is powered on, the driving plate 13 is applied with force, the driving plate 13 descends along the rack 1, in the descending process of the driving plate 13, the testing piece 15 of the detection circuit is in contact with the testing point 31 on the circuit board 2, and the testing lead 3 is connected into the detection circuit.
When the circuit board 2 is not subjected to V-VCUT, the test wire 33 is not cut, so that after the test lead 3 is connected to the detection circuit, the detection circuit is conducted, the alarm module sends an alarm, and meanwhile, the indicator light is lightened to inform a worker to rework the circuit board 2; when the circuit board 2 is CUT by the V-CUT, the test wire 33 is CUT off, as shown in fig. 3, at this time, even if the test wire 3 is connected into the detection circuit, the detection circuit is broken, the alarm module is not powered on, no alarm is sent, the indicator light is not lighted, and the circuit board 2 passes the detection.
In the process of detecting the circuit board 2, the counting module counts the times of sending the alarm, and the obtained alarm statistic value also represents the times of reworking. Setting a statistical threshold value stored in a storage module as X, setting an alarm statistical value as Y, and when Y is larger than X, sending prompt information by a prompt module to remind a manager to check the V-CUT equipment; the counting module is also used for counting the times of sending the prompt information to obtain a prompt statistic value so as to prompt the timely replacement of the V-CUT equipment.
After the detection work of a batch of circuit boards 2 is completed, the alarm statistic value is reset by using the reset module, and X is reset to 0.
Example two
The difference with the first embodiment lies in that the scheme further includes a collecting step, after the detecting step is completed, the circuit board on the placing plate 11 is pushed into a collecting box abutted against the placing plate 11, correspondingly, the identification system is further provided with a collecting mechanism, the collecting mechanism is located on one side of the placing plate 11, the collecting mechanism includes a collecting box, and one side of the collecting box is abutted against the placing plate 11.
Set up and collect the mechanism and collect circuit board 2 through detecting, place board 11 and the collecting box counterbalance back, after circuit board 2 through detecting, can directly push circuit board 2 into on the collecting box can, easy operation.
EXAMPLE III
Consider when the PCB board is placed, stack the warehouse with whole case's mode usually, when needing, take out whole case's PCB board back in the warehouse, carry out follow-up processing again, because the PCB board is stored with the mode of stacking, the stability that the action of taking of irregularity makes the PCB board stack weakens, receives slight vibration, the condition that the PCB board dropped appears easily, the condition that the PCB board damaged also appears easily.
The present embodiment is different from the first and second embodiments in that: the system also comprises a supervision subsystem, an identity verification terminal and a plurality of monitoring terminals. The identity authentication terminal is arranged at the gate of the warehouse, and warehouse management personnel can open the warehouse to take goods only after passing the authentication. The monitoring terminals are arranged in the warehouse and are respectively arranged in a plurality of directions of the warehouse and used for shooting storage videos for stacking the PCB.
The identity verification terminal is used for obtaining identity information of the stock management personnel for verification, generating a verification signal when the verification is successful, and uploading the verification signal to the supervision subsystem.
The supervision subsystem comprises a monitoring control module, a behavior recognition module, a stacking early warning module, a comparison module and a reminding module.
And the monitoring control module is used for controlling the starting of the monitoring terminal when receiving the verification signal.
The monitoring terminal is used for collecting storage videos containing stacked PCB boards in the warehouse and uploading the storage videos to the supervision subsystem in real time. In this embodiment, the number of the monitoring terminals is four, and the monitoring terminals are respectively used for shooting images of the front side, the left side, the right side and the rear side of the stacked PCB.
The basic identification module is used for receiving the storage video, carrying out image identification on the storage video, marking the storage video when identifying the storage manager, and sending the marked storage video to the behavior identification module. In the embodiment, the number of the stored videos is four, and when the left side and the right side of the custody staff are completely overlapped with the stacked PCB in any group of the stored videos, the group of videos are marked as front-side images; when any group of stored videos has the same picture with the stacked PCB, and the left side and the right side of the warehouse manager do not overlap with the stacked PCB, the group of videos are marked as left and right images, and the left and right images are at most two groups.
The behavior recognition module is used for receiving the storage video, performing image recognition on the storage video, recognizing the actions of the storage management personnel when the storage management personnel are recognized, and marking the collection boxes stacked in the PCB according to recognition results. The identification result is a collection box which predicts the removal of the warehouse keeper from the stacked PCB.
The stack early warning module is preset with an analysis model, and in the embodiment, the behavior analysis model adopts a BP neural network model. The stacking early warning module is used for inputting the marked collection boxes and the storage videos in four directions into the analysis module, outputting the stability results generated according to the marked collection boxes and the storage videos in four directions in the analysis module, wherein the stability results comprise stable structures and unstable structures, and the stability results are sent to the comparison module.
The comparison module is used for receiving the stored video, carrying out image recognition on the stored video, comparing the collecting box with the marked collecting box when a warehouse manager is identified to take away the collecting box for stacking the PCB, generating a predicted consistent signal when the collecting box and the marked collecting box are the same collecting box, generating a reminding signal when a stability result with an unstable structure is received, and sending the reminding signal to the reminding module; and the stacking early warning module is also used for updating the marked collecting box into the collecting box when the two collecting boxes are different collecting boxes, and sending the marked collecting box to the stacking early warning module.
The reminding module is used for receiving reminding signals and sending out reminding to the warehouse manager.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. The identification method for the circuit board V-CUT is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
marking: marking a test lead on a circuit board to be detected, wherein the test lead comprises a test line and test points at two ends of the test line, and the test lead passes through a preset V-CUT position;
a placing step: placing the marked circuit board on a detection mechanism; the detection mechanism comprises a detection circuit, a drive plate and a placing plate, wherein two ends of the detection circuit are respectively provided with a conductive detection piece, and the detection circuit also comprises an alarm module used for sending an alarm when the detection circuit is switched on; the detection circuit is arranged on the driving plate, the driving plate is connected with the placing plate through a driving rod, and the driving plate can reciprocate up and down along the driving rod;
a detection step: after the circuit board is placed on the placing board, the driving board moves downwards to enable the testing point to be in contact with the testing piece; if the circuit line is not V-CUT, the alarm module sends an alarm.
2. The identification method for the circuit board V-CUT according to claim 1, wherein: in the placing step, the marked circuit board is placed in the limiting groove on the placing plate.
3. The identification method for the circuit board V-CUT according to claim 1, wherein: in the detection step, before the driving plate moves downwards, a safety switch on the driving plate is closed, and the detection circuit is controlled to be electrified.
4. The identification method for the circuit board V-CUT according to claim 1, wherein: the method also comprises a collecting step, wherein after the detecting step is completed, the circuit board on the placing plate is pushed into a collecting box which is abutted against the placing plate.
5. The identification method for the circuit board V-CUT according to claim 1, wherein: the method also comprises an indicating step, wherein an indicator lamp of the detection mechanism is lightened when the detection circuit is conducted.
6. The identification method for the circuit board V-CUT according to claim 1, wherein: the method also comprises a counting step of counting the times of sending the alarm and obtaining an alarm statistic value.
7. The identification method for the circuit board V-CUT according to claim 6, wherein: the method also comprises a storage step of storing a statistical threshold;
a comparison step of comparing the obtained alarm statistic value with a statistic threshold value;
and a prompting step, namely sending prompting information when the alarm statistic value is larger than the statistic threshold value.
8. The identification method for the circuit board V-CUT according to claim 7, wherein: also included is a reset step of resetting the alarm statistics.
9. The identification method for the circuit board V-CUT of claim 8, wherein: in the counting step, the times of sending the prompt information are counted, a prompt statistic value is generated, and the prompt statistic value is stored in the storing step.
10. Identification point for a circuit board V-CUT, characterized in that: the test point set on the circuit board to be tested according to claim 1, wherein the test point is located on one side of the preset V-CUT position on the circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911422534.2A CN110988659A (en) | 2019-12-31 | 2019-12-31 | Identification point and identification method for circuit board V-CUT |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911422534.2A CN110988659A (en) | 2019-12-31 | 2019-12-31 | Identification point and identification method for circuit board V-CUT |
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| CN110988659A true CN110988659A (en) | 2020-04-10 |
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| CN201911422534.2A Pending CN110988659A (en) | 2019-12-31 | 2019-12-31 | Identification point and identification method for circuit board V-CUT |
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| CN202218477U (en) * | 2011-08-12 | 2012-05-09 | 湖北建浩科技有限公司 | PCB (Printed Circuit Board) capable of quickly judging V-CUT |
| CN103513141A (en) * | 2012-06-21 | 2014-01-15 | 国基电子（上海）有限公司 | Circuit board convenient in V-CUT quality checking and circuit board testing method thereof |
| CN203446114U (en) * | 2013-09-29 | 2014-02-19 | 胜宏科技（惠州）股份有限公司 | V-CUT offset detection structure for printed circuit board |
| CN203446103U (en) * | 2013-09-29 | 2014-02-19 | 胜宏科技（惠州）股份有限公司 | Circuit board capable of detecting V-CUT omission |
| CN205029960U (en) * | 2015-10-23 | 2016-02-10 | 建业科技电子（惠州）有限公司 | Prevent leak V -CUT's PCB board |
| CN207703743U (en) * | 2017-12-26 | 2018-08-07 | 东莞市科佳电路有限公司 | A kind of detection marking equipment of wiring board |
| CN108414920A (en) * | 2018-03-15 | 2018-08-17 | 昆山翰辉电子科技有限公司 | Circuit board test apparatus |
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- 2019-12-31 CN CN201911422534.2A patent/CN110988659A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202218477U (en) * | 2011-08-12 | 2012-05-09 | 湖北建浩科技有限公司 | PCB (Printed Circuit Board) capable of quickly judging V-CUT |
| CN103513141A (en) * | 2012-06-21 | 2014-01-15 | 国基电子（上海）有限公司 | Circuit board convenient in V-CUT quality checking and circuit board testing method thereof |
| CN203446114U (en) * | 2013-09-29 | 2014-02-19 | 胜宏科技（惠州）股份有限公司 | V-CUT offset detection structure for printed circuit board |
| CN203446103U (en) * | 2013-09-29 | 2014-02-19 | 胜宏科技（惠州）股份有限公司 | Circuit board capable of detecting V-CUT omission |
| CN205029960U (en) * | 2015-10-23 | 2016-02-10 | 建业科技电子（惠州）有限公司 | Prevent leak V -CUT's PCB board |
| CN207703743U (en) * | 2017-12-26 | 2018-08-07 | 东莞市科佳电路有限公司 | A kind of detection marking equipment of wiring board |
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Application publication date: 20200410 |