CN105425094B - A kind of PCBA short dots detection method and device - Google Patents
A kind of PCBA short dots detection method and device Download PDFInfo
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- CN105425094B CN105425094B CN201510825082.8A CN201510825082A CN105425094B CN 105425094 B CN105425094 B CN 105425094B CN 201510825082 A CN201510825082 A CN 201510825082A CN 105425094 B CN105425094 B CN 105425094B
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- measurement point
- point
- resistance
- electric network
- measurement
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- 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
Abstract
The present invention provides a kind of PCBA short dots detection method and device, belong to printed circuit board (PCB) detecting field.In the present invention, any point in the first electric network is set first as basic point；The both ends in the second electric network are set as the first measurement point and the second measurement point；Then first resistor and second resistance are obtained；And judge whether first resistor is more than second resistance, if so, the first measurement point to be then updated to the midpoint of the first measurement point and the second measurement point, if it is not, then updating the second measurement point；Judge whether the distance between the first measurement point and the second measurement point are less than preset value again, if, then perform and judge the second electric network between the first measurement point and the second measurement point and the generation short circuit of the first electric network, if it is not, then performing the step of obtaining first resistor and second resistance；The present invention, without investigating component one by one, improves the efficiency of detection printed circuit board (PCB) short dot by a kind of PCBA short dots detection method and device.
Description
Technical field
The present invention relates to printed circuit board test field, more particularly to a kind of PCBA short dots detection method and device.
Background technology
PCBA (Printed Circuit Board Assembly, the printed circuit board (PCB) assembled) in process of production can
There is the short circuit phenomenon caused by partial material is bad or technique is bad, if electronics material quantity is many on printed circuit board (PCB)
When, conventional investigation method often investigates all electronics materials in short-circuit network one by one, and the method is not only
Inefficiency, loses time, or even can sometimes damage electronics material.
The content of the invention
The present invention provides a kind of PCBA short dots detection method and device, it is intended to solves asking for prior art inefficiency
Topic.
On the one hand, the present invention provides a kind of PCBA short circuits point detecting method, the printed circuit board (PCB) to include the first power grid
Network and the second electric network, multiple components in parallel, described one kind between first electric network and second electric network
PCBA short circuit point detecting methods include：
A. any point in first electric network is set as basic point；
B. the first end in second electric network is set as the first measurement point, sets second in second electric network
Hold as the second measurement point；
C. first resistor and second resistance are obtained, the first resistor is between first measurement point and the basic point
Resistance, resistance of the second resistance between second measurement point and the basic point；
D. judge whether the first resistor is more than the second resistance, if so, step e is then performed, if it is not, then performing step
Rapid f；
E., first measurement point is updated to the midpoint of first measurement point and second measurement point；
F., second measurement point is updated to the midpoint of first measurement point and second measurement point；
G. judge whether the distance between first measurement point and second measurement point are less than preset value, if so, then
Step h is performed, if it is not, then performing step c；
H. second electric network and the described first electricity between first measurement point and second measurement point are judged
Short circuit occurs for network.
Second aspect, the present invention provides a kind of PCBA short circuits point detection device, the printed circuit board (PCB) includes the first electricity
Network and the second electric network, multiple components in parallel, described one kind between first electric network and second electric network
PCBA short circuit point detection devices include：
Basic point presetting module, for setting any point in first electric network as basic point；
Measurement point presetting module, for setting the first end in second electric network as the first measurement point, described in setting
Second end in second electric network is the second measurement point；
Resistance acquisition module, for obtaining first resistor and second resistance, the first resistor is first measurement point
Resistance between the basic point, resistance of the second resistance between second measurement point and the basic point；
Resistance judgment module, for judging whether the first resistor is more than the second resistance；
First measurement point update module, for first measurement point to be updated to first measurement point and described second
The midpoint of measurement point；
Second measurement point update module, for second measurement point to be updated to first measurement point and described second
The midpoint of measurement point；
Distance Judgment module, for judging whether the distance between first measurement point and second measurement point are less than
Preset value；
Determination module, for judge second electric network between first measurement point and second measurement point with
Short circuit occurs for first electric network.
In the present invention, due to setting any point in the first electric network first as basic point；Set in the second electric network
First end is the first measurement point, sets the second end in the second electric network as the second measurement point；Then first resistor and the are obtained
Two resistance, resistance of the first resistor between the first measurement point and basic point, second resistance is between the second measurement point and basic point
Resistance；And judge whether first resistor is more than second resistance, if so, the first measurement point then is updated to the first measurement point and second
The midpoint of measurement point, if it is not, the second measurement point to be then updated to the midpoint of the first measurement point and the second measurement point；First is judged again
Whether the distance between measurement point and the second measurement point are less than preset value, judge that the first measurement point and second is surveyed if so, then performing
Short circuit occurs for the second electric network and the first electric network between amount point, if it is not, then performing acquisition first resistor and second resistance
Step；It is therefore not necessary to investigate component one by one, the efficiency of detection printed circuit board (PCB) short dot is improved.
Brief description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of a kind of flow chart of PCBA short circuits point detecting method that the embodiment of the present invention one provides；
Fig. 2 is a kind of a kind of structure diagram of PCBA short circuits point detection device provided by Embodiment 2 of the present invention；
Fig. 3 is a kind of structure diagram of PCBA short circuits point detection device determination module provided by Embodiment 2 of the present invention；
Fig. 4 is circuit structure diagram on printed circuit board (PCB).
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment one：
Fig. 1 shows the flow of realizing of PCBA short circuits point detecting method provided in this embodiment, and printed circuit board (PCB) includes the
One electric network and the second electric network, multiple components in parallel between the first electric network and the second electric network, for convenience of description,
Part related to the present embodiment is illustrate only, details are as follows：
In a step 101, any point in the first electric network is set as basic point.
In a step 102, the first end in the second electric network is set as the first measurement point, sets the in the second electric network
Two ends are the second measurement point.
In step 103, first resistor and second resistance, electricity of the first resistor between the first measurement point and basic point are obtained
Resistance, resistance of the second resistance between the second measurement point and basic point.
Wherein, step 103 can be specially：Respectively with basic point, the first measurement point and the nearest pad of the second measurement point
Or substitution point of the test point as basic point, the first measurement point and the second measurement point, acquisition first resistor and second resistance, first
Resistance of the resistance between the first measurement point and basic point, resistance of the second resistance between the second measurement point and basic point.
Wherein, first resistor is that a test probe is connected the nearest pad of the first measurement point or test point, another
After the test probe nearest pad of connection basic point or test point, the resistance value that measures；Second resistance is to visit a test
The nearest pad of the second measurement point of head connection or test point, the nearest pad of another test probe connection basic point or test point
Afterwards, the resistance value measured.
At step 104, judge whether first resistor is more than second resistance, if so, step 105 is then performed, if it is not, then holding
Row step 106.
In step 105, the first measurement point is updated to the midpoint of the first measurement point and the second measurement point.Wherein, it is above-mentioned
Midpoint the second electric network up to distance and the above-mentioned midpoint of the first measurement point the second electric network up to the second measurement point away from
From identical.
In step 106, the second measurement point is updated to the midpoint of the first measurement point and the second measurement point.
In step 107, judge whether the distance between the first measurement point and the second measurement point are less than preset value, if so,
Step 108 is then performed, if it is not, then performing step 103.Wherein, preset value can be the minimum pitch value of component.
In step 108, judge that the second electric network between the first measurement point and the second measurement point and the first electric network are sent out
Raw short circuit.
In specific implementation, step 108 can be divided into two kinds of situations：
A. when there are during component, judging the first measurement point and the second measurement point between the first measurement point and the second measurement point
Between component occur short circuit；
B. when component is not present between the first measurement point and the second measurement point, the first measurement point and the second measurement are judged
Line short occurs for the second electric network and the first electric network between point.
For example, as shown in figure 4, first resistor R1 in parallel is to the 7th resistance between the first electric network and the second electric network
R7, sets any point O points in the first electric network as basic point first；The first end A points set in the second electric network are surveyed as first
Point is measured, sets the second end B points in the second electric network as the second measurement point；Then obtaining first resistor (resistance between AO) is
0.05 ohm, it is 0.06 ohm to obtain second resistance (resistance between BO)；And judge whether first resistor is more than second resistance,
It is determined as midpoint C points no, therefore that the second measurement point is updated to the first measurement point and the second measurement point；Judge the first measurement point A
Whether point and the distance between second measurement point C points are less than preset value, are determined as no, therefore the acquisition first resistor (electricity between AO
Resistance) it is 0.05 ohm, it is 0.04 ohm to obtain second resistance (resistance between CO), judges whether first resistor is more than the second electricity
Resistance, is determined as it being therefore the first measurement point to be updated to the midpoint D points of the first measurement point and the second measurement point；The first survey is judged again
Amount the distance between point D points and the second measurement point C points whether be less than preset value, be determined as it is no, then obtain again first resistor (DO it
Between resistance) be 0.03 ohm, obtain second resistance (resistance between CO) be 0.04 ohm；And judge whether first resistor is big
In second resistance, it is determined as midpoint E points no, therefore that the second measurement point is updated to the first measurement point and the second measurement point；Sentence again
Whether disconnected the distance between first measurement point D points and the second measurement point E points are less than preset value, are determined as it being then to judge that first surveys
Measure the second electric network between point D points and the second measurement point E points and short circuit occurs for the first electric network, because the first measurement point D points
And second between measurement point E points there are 3rd resistor R3, it is determined that short circuit occurs for 3rd resistor R3.
The present embodiment by setting any point in the first electric network as basic point first；Set first in the second electric network
Hold as the first measurement point, set the second end in the second electric network as the second measurement point；Then first resistor and the second electricity are obtained
Resistance, resistance of the first resistor between the first measurement point and basic point, resistance of the second resistance between the second measurement point and basic point；
And judge whether first resistor is more than second resistance, if so, the first measurement point then is updated to the first measurement point and the second measurement
The midpoint of point, if it is not, the second measurement point to be then updated to the midpoint of the first measurement point and the second measurement point；The first measurement is judged again
Whether the distance between point and the second measurement point are less than preset value, judge the first measurement point and the second measurement point if so, then performing
Between the second electric network and the first electric network short circuit occurs, obtain first resistor and the step of second resistance if it is not, then performing；
It is therefore not necessary to investigate component one by one, the efficiency of detection printed circuit board (PCB) short dot is improved.
Embodiment two：
The embodiment of the present invention two provides a kind of PCBA short circuits point detection device, printed circuit board (PCB) include the first electric network and
Second electric network, multiple components in parallel between the first electric network and the second electric network, as shown in Fig. 2, a kind of PCBA is short-circuit
Point detection device 20 includes basic point presetting module 210, measurement point presetting module 220, resistance acquisition module 230, resistance and judges mould
Block 240, the first measurement point update module 250, the second measurement point update module 260, Distance Judgment module 270 and determination module
280。
Basic point presetting module 210, for setting any point in the first electric network as basic point.
Measurement point presetting module 220, for setting the first end in the second electric network as the first measurement point, the electricity of setting second
Second end in network is the second measurement point.
Resistance acquisition module 230, for obtaining first resistor and second resistance, first resistor is the first measurement point and basic point
Between resistance, resistance of the second resistance between the second measurement point and basic point.
In specific implementation, resistance acquisition module 230, specifically for respectively with basic point, the first measurement point and the second measurement
Substitution point of the nearest pad or test point of point as basic point, the first measurement point and the second measurement point, obtain first resistor with
Second resistance, resistance of the first resistor between the first measurement point and basic point, second resistance is between the second measurement point and basic point
Resistance.
Resistance judgment module 240, for judging whether first resistor is more than second resistance.
First measurement point update module 250, for the first measurement point to be updated to the first measurement point and the second measurement point
Midpoint.
Second measurement point update module 260, for the second measurement point to be updated to the first measurement point and the second measurement point
Midpoint.
Distance Judgment module 270, for judging it is default whether the distance between the first measurement point and the second measurement point are less than
Value.Wherein, preset value is the minimum pitch value of component.
Determination module 280, for judging the second electric network and the first power grid between the first measurement point and the second measurement point
Short circuit occurs for network.
Wherein, as shown in figure 3, determination module 280 includes component short circuit determination module 281 and line short determination module
282。
Component short circuit determination module 281, for when, there are during component, sentencing between the first measurement point and the second measurement point
Short circuit occurs for fixed component between first measurement point and the second measurement point.
Line short determination module 282, for when component is not present between the first measurement point and the second measurement point, sentencing
Line short occurs for fixed the second electric network between first measurement point and the second measurement point and the first electric network.
In conclusion the present embodiment by setting any point in the first electric network as basic point first；Set the second power grid
First end in network is the first measurement point, sets the second end in the second electric network as the second measurement point；Then the first electricity is obtained
Resistance and second resistance, resistance of the first resistor between the first measurement point and basic point, second resistance are the second measurement point and basic point
Between resistance；And judge whether first resistor is more than second resistance, if so, the first measurement point then is updated to the first measurement point
With the midpoint of the second measurement point, if it is not, the second measurement point to be then updated to the midpoint of the first measurement point and the second measurement point；Sentence again
Whether disconnected the distance between first measurement point and the second measurement point are less than preset value, if so, then perform judge the first measurement point with
Short circuit occurs for the second electric network and the first electric network between the second measurement point, and first resistor and second is obtained if it is not, then performing
The step of resistance；It is therefore not necessary to investigate component one by one, the efficiency of detection printed circuit board (PCB) short dot is improved.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
One of ordinary skill in the art will appreciate that hardware can be passed through by realizing all or part of step of above-described embodiment
To complete, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be the readable and writable memory that power down is not lost, disk etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of PCBA short circuits point detecting method, printed circuit board (PCB) includes the first electric network and the second electric network, described first
A kind of multiple components in parallel between electric network and second electric network, it is characterised in that PCBA short dots detection side
Method includes：
A. any point in first electric network is set as basic point；
B. set the first end in second electric network as the first measurement point, set second end in second electric network as
Second measurement point；
C. first resistor and second resistance, electricity of the first resistor between first measurement point and the basic point are obtained
Resistance, resistance of the second resistance between second measurement point and the basic point；
D. judge whether the first resistor is more than the second resistance, if so, step e is then performed, if it is not, then performing step f；
E., first measurement point is updated to the midpoint of first measurement point and second measurement point；
F., second measurement point is updated to the midpoint of first measurement point and second measurement point；
G. judge whether the distance between first measurement point and second measurement point are less than preset value, if so, then performing
Step h, if it is not, then performing step c；
H. second electric network between first measurement point and second measurement point and first electric network are judged
Generation short circuit.
2. a kind of PCBA short circuits point detecting method according to claim 1, it is characterised in that the step h includes：
H1. when there are during component, judge between first measurement point and second measurement point first measurement point and
Short circuit occurs for the component between second measurement point；
H2. when component is not present between first measurement point and second measurement point, first measurement point is judged
With first electric network line short occurs for second electric network between second measurement point.
3. a kind of PCBA short circuits point detecting method according to claim 1, it is characterised in that the step c is specially：
Respectively using the basic point, first measurement point and the nearest pad of second measurement point or test point described in
The substitution point of basic point, first measurement point and second measurement point, acquisition first resistor and second resistance, described first
Resistance of the resistance between first measurement point and the basic point, the second resistance are second measurement point and the base
Resistance between point.
4. a kind of PCBA short circuits point detecting method according to claim 1, it is characterised in that the preset value is the member
The minimum pitch value of device.
5. a kind of PCBA short circuits point detection device, printed circuit board (PCB) includes the first electric network and the second electric network, described first
A kind of multiple components in parallel between electric network and second electric network, it is characterised in that PCBA short dots detection dress
Put including：
Basic point presetting module, for setting any point in first electric network as basic point；
Measurement point presetting module, for setting the first end in second electric network as the first measurement point, setting described second
Second end in electric network is the second measurement point；
Resistance acquisition module, for obtaining first resistor and second resistance, the first resistor is first measurement point and institute
State the resistance between basic point, resistance of the second resistance between second measurement point and the basic point；
Resistance judgment module, for judging whether the first resistor is more than the second resistance；
First measurement point update module, for first measurement point to be updated to first measurement point and second measurement
The midpoint of point；
Second measurement point update module, for second measurement point to be updated to first measurement point and second measurement
The midpoint of point；
Distance Judgment module, for judging it is default whether the distance between first measurement point and second measurement point are less than
Value；
Determination module, for judge second electric network between first measurement point and second measurement point with it is described
Short circuit occurs for the first electric network.
6. a kind of PCBA short circuits point detection device according to claim 5, it is characterised in that the acquisition module includes：
Component short circuit determination module, for when between first measurement point and second measurement point there are during component,
Judge that short circuit occurs for the component between first measurement point and second measurement point；
Line short determination module, for when component is not present between first measurement point and second measurement point,
Judge that with first electric network line occurs for second electric network between first measurement point and second measurement point
Short out road.
A kind of 7. PCBA short circuits point detection device according to claim 5, it is characterised in that the resistance acquisition module,
Specifically for respectively using the basic point, first measurement point and the nearest pad of second measurement point or test point as
The substitution point of the basic point, first measurement point and second measurement point, obtains first resistor and second resistance, described
Resistance of the first resistor between first measurement point and the basic point, the second resistance are second measurement point and institute
State the resistance between basic point.
8. a kind of PCBA short circuits point detection device according to claim 5, it is characterised in that the preset value is the member
The minimum pitch value of device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510825082.8A CN105425094B (en) | 2015-11-24 | 2015-11-24 | A kind of PCBA short dots detection method and device |
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| CN201510825082.8A CN105425094B (en) | 2015-11-24 | 2015-11-24 | A kind of PCBA short dots detection method and device |
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| CN105425094B true CN105425094B (en) | 2018-04-27 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108169664B (en) * | 2017-12-29 | 2021-01-01 | 深圳市大族数控科技有限公司 | Circuit board fault detection method and device, computer equipment and storage medium |
| CN110554273A (en) * | 2019-09-02 | 2019-12-10 | 昆山纬亚智能科技有限公司 | Detection method of PCBA short circuit point |
| CN113109694A (en) * | 2021-04-12 | 2021-07-13 | 北京电子工程总体研究所 | Method for detecting and positioning short circuit point of circuit board |
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