CN109581187A - A kind of detection method of power plane short circuit - Google Patents
A kind of detection method of power plane short circuit Download PDFInfo
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- CN109581187A CN109581187A CN201811387920.8A CN201811387920A CN109581187A CN 109581187 A CN109581187 A CN 109581187A CN 201811387920 A CN201811387920 A CN 201811387920A CN 109581187 A CN109581187 A CN 109581187A
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- power plane
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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
- G01R31/28—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
- G01R31/2812—Checking for open circuits or shorts, e.g. solder bridges; Testing conductivity, resistivity or impedance
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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)
- Tests Of Electronic Circuits (AREA)
Abstract
The present invention relates to the power plane short-circuit detectings of telecommunication apparatus veneer, more specifically, are a kind of methods for realizing power plane short-circuit detecting by voltage measurement, are particularly suitable for quickly orienting power supply short circuit region on the veneer that area is big and device density is high.Under existing environment, the hardware of telecommunication apparatus more becomes complicated, so as to form the feature that veneer area is big, device density is high, electric source topology is complicated.And 3.3V power supply in many chips and filter capacitor, such as plate is connected on main power source network, almost cover whole plate.If having some device or capacitance short-circuit in power plane, according to the prior art, short dot is found on veneer big in area and high device density with looking for a needle in a haystack formula, location efficiency is very low, and probably can not find short dot and have to abandon.The present invention detects the small range region of doubtful short circuit using voltage measurement method, and intuitively marks out in a manner of graphical interfaces, then finds short dot using conventional method in this small range region again, substantially increases location efficiency.
Description
Technical field
The present invention relates to the power plane short-circuit detectings of telecommunication apparatus veneer, are a kind of by voltage survey more specifically
The method for measuring to realize power plane short-circuit detecting, is particularly suitable for quickly orienting on the veneer that area is big and device density is high
Power supply short circuit region.
Technical background
Telecommunication apparatus is usually made of backboard and the various veneers being inserted on backboard.These veneers introduce system electricity from backboard
Convert all kinds of power supplys needed for generating chip in plate behind source as plate interior power module again.As people want various communication services
It asks and gradually increases, the hardware of telecommunication apparatus more becomes complicated, so as to form veneer area is big, device density is high, electric source topology is multiple
Miscellaneous feature.And 3.3V power supply in many chips and filter capacitor, such as plate is connected on main power source network, almost cover
Whole plate.If having some device or capacitance short-circuit in power plane, according to the prior art, nothing but be using Appearance Visual, by
The detection means such as split circuit detection, thermal imaging system scanning are walked, but are used on veneer big in nowadays area and high device density
The prior art finds short dot, is tantamount to look for a needle in a haystack.Therefore, existing detection technique is difficult to find short dot, and location efficiency is non-
It is often low.
Summary of the invention
The present invention provides a kind of detection method of power plane short circuit, to solve the veneer that area is big and device density is high
On the problem of how quickly orienting power supply short circuit region, then the prior art is recycled to be checked to the region emphasis until finding out
Short dot greatly improves the location efficiency of such failure.
A kind of detection system of power plane short circuit, including voltage measurement unit, data processing unit and short-circuited region
Add red mark unit；
The test result of voltage measurement unit is input to data processing unit；
Data processing unit is used to carry out percentage statistics, normalized to each sample point measured result, to arrange
The test result report of each test point out；
The test result report of data processing unit is input to short-circuited region and adds red mark unit；
Further, the voltage measurement unit includes DC power supply power supply unit, tested sample point selection unit and survey
Try unit；DC power supply power supply unit is used to provide the low current power supply of the voltage class to surveyed power plane；It is tested
Sample point selection unit is used to select the measured point in the power plane；Test cell is used to carry out voltage survey to selected sample point
Amount.
A kind of detection method of power plane short circuit, it is quickly fixed to be particularly suitable on the veneer that area is big and device density is high
Position goes out power supply short circuit region, including voltage measurement unit, data processing unit and short-circuited region add red mark unit, simultaneously also
Include the following steps process:
Step 1, the problem of excluding power module itself.Power module in veneer in this power plane is removed, is checked
Whether short circuit caused by power module.If detecting at this time, power plane is not short-circuit, is described the problem out in power module, then
As long as replacement or maintenance power module；If power plane or short circuit, illustrate that failure in plate interior power plane, is needed into one
Step detects down.
Step 2, each tested sample point is chosen.Select resistance in the power plane in different zones, capacitor, diode,
The pin of the active devices such as the passive devices such as mos pipe and various chips is as tested sample point.Tested sample point chosen area
Range is wider and quantity in each region is more, then is more conducive to reduce short-circuited region range.
Step 3, voltage measurement is carried out.The small electricity of the voltage class is provided to surveyed power plane using DC power supply
Galvanic electricity source, typically 0 to the low current between 1A.Then automatic test or manual test means are used, to each of selection
Sample point carries out voltage measurement, and saves result.
Step 4, percentage statistics, normalized are carried out to each sample point measured result, to sort out each test point
Test result report.Since each sample point is all the small voltage of mV rank, absolute value of voltage is smaller, so calculating various kinds
Percentage between the surveyed voltage of this point and the power plane voltage class simultaneously makees normalized, sorts out comprising each test point
Test result report.
Step 5, the red doubtful short-circuited region for marking out power plane is added in a manner of graphical interfaces.First with graphical interfaces
Mode each device in power plane is distributed in power plane by coordinate position.It is then introduced into above-mentioned test result report
Accuse, and use different HTML color codes, according to above-mentioned normalized value from big to small, color code color from indigo plant to Huang to red
The principle gradually deepened, color separation show the device of each tested sample point in power plane.Normalized value is smaller, corresponding device face
Color is redder, then the most red region of color is the small range region of doubtful short circuit.
As long as tested sample point in step 2 is chosen, regional scope is wider and quantity in each region is more, then
Red area is more concentrated, is more obvious, and here it is the small range regions of doubtful short circuit.
Step 6, it is then checked in the small range region using prior art means, until finding out short circuit
Point.
Automatic test in the step 3 can be realized, the survey using the automatic test platform of communication equipment producer
Examination platform is made of backstage computer, manipulator, oscillograph, equipment under test etc..Can measured point coordinate typing to test script,
Then it navigates to each coordinate points by the mobile oscilloprobe of manipulator to be tested automatically, test result is saved to backstage computer.
Normalized in the step 4 this can be implemented so that test point maximum for percentages, normalization
It is 1；Remaining each point converses corresponding normalization according to the proportionate relationship between its percentages and this test point respectively
Value.
The present invention detects the small range region of doubtful short circuit using voltage measurement method, and straight in a manner of graphical interfaces
Sight, which marks out, to be come, and is then found short dot using conventional method in this small range region again, is substantially increased location efficiency.And
Short dot is found on the veneer that the prior art is big in area and device density is high with looking for a needle in a haystack formula, location efficiency is very low, and
Probably it can not find short dot and have to abandon.
Detailed description of the invention:
Fig. 1 is the principle of the present invention conceptual scheme；
Fig. 2 is cellular construction block diagram of the invention；
Fig. 3 is that short-circuited region of the invention adds red mark cell schematics；
Fig. 4 is step flow chart of the invention.
Specific embodiment:
Technical principle of the invention is as follows: referring to attached drawing 1, general electric power network model can be equivalent to power sources in parallel
N device.If one of shorted devices, it is assumed that the i-th shorted devices in figure, then, with direct-flow voltage regulation source input one
When the electric current of very little, according to the principle that power supply is transmitted along impedance minimal path, electric current can be flowed through along the i-th device, in figure
Shown in arrow direction.According to basic principle of circuit, voltage declines along current direction, it means that electricity on the device
Pressure, which can be less than other, does not have the branch of ineffective part, typically the small voltage pressure difference of mV rank.
Using above-mentioned principle, big veneer is divided into several regions, measures the voltage in each region, then measure voltage compared with
A possibility that short circuit occurs in low region is very big.Moreover, the measured point sample size chosen in plate is bigger, then doubtful short-circuited region
Range more concentrate, i.e., closer to short dot.Then prior art means are utilized, emphasis carries out the device in the region
Investigation.
In order to be best understood from technical solution of the present invention, clear, complete description is carried out to the present invention with reference to the accompanying drawing.
Based on can not quickly and effectively orient power supply short circuit point on the prior art veneer big and high device density in area
The problem of, the present invention provides a kind of method that power plane short-circuit detecting is realized by voltage measurement.
Referring to attached drawing 2, attached drawing 2 is the structural frames that the present invention realizes power plane method for detecting short circuit by voltage measurement
Figure.Add red mark unit 300 including voltage measurement unit 100, data processing unit 200 and short-circuited region.
Voltage measurement unit 100 includes that DC power supply power supply unit 101, tested sample point selection unit 102 and test are single
Member 103.DC power supply power supply unit 101 is used to provide the low current power supply of the voltage class to surveyed power plane.Quilt
Test sample this selection unit 102 is for selecting the measured point in the power plane.Test cell 103 is used to click through selected sample
Row voltage measurement.The test result of voltage measurement unit 100 is input to data processing unit 200.
Data processing unit 200 is used to carry out percentage statistics, normalized to each sample point measured result, thus whole
Manage out the test result report of each test point.The test result report of data processing unit 200 is input to short-circuited region and adds red mark
Infuse unit 300.
Short-circuited region adds red mark unit 300 using different HTML color codes, and (each HTML color code includes " # "
Symbol and six 16 binary digits), according to above-mentioned normalized value from big to small, color code color from indigo plant to Huang to it is red gradually plus
Deep principle, color separation show the device of each tested sample point in power plane, then the most red region of color is doubtful short circuit
Small range region.Referring to attached drawing 3, attached drawing 3 is the schematic diagram that short-circuited region adds red mark unit, is in the circle of the upper left corner in figure
The power module position of the electric power network is to be suspected to be short-circuited region in the circle of the lower right corner, the tested sample point in most of region in figure
Device color be it is blue, be suspected to be short-circuited region closer to the lower right corner, the color of surveyed sample point device is deeper, until in the region
Become red.
Therefore, the present invention detects the small range region of doubtful short circuit using voltage measurement method, and with graphical interfaces
Mode, which intuitively marks out, to be come, and is then found short dot using conventional method in this small range region again, is substantially increased positioning
Efficiency.And short dot is found on the veneer that the prior art is big in area and device density is high with looking for a needle in a haystack formula, location efficiency is non-
It is often low, and probably can not find short dot and have to abandon.
Referring to attached drawing 4, attached drawing 4 is the step of present invention realizes power plane method for detecting short circuit by voltage measurement stream
Cheng Tu includes the following steps process:
(1), the problem of S101 is first carried out, excludes power module itself.By the power supply mould in veneer in this power plane
Block is removed, investigation whether short circuit caused by power module.If detection power plane is not short-circuit at this time, describe the problem out in power supply
Module, as long as then replacement or maintenance power module, process to S107 terminate；If still short-circuit, illustrate failure in plate
Power plane, process to S102.
(2), S102 is executed, each tested sample point is chosen.Select resistance in the power plane in different zones, capacitor,
The pin of the active devices such as passive devices and various chips such as diode, mos pipe is as tested sample point.Tested sample clicks
It takes regional scope wider and quantity in each region is more, be then more conducive to reduce short-circuited region range.
(3), S103 is executed, voltage measurement is carried out.Voltage etc. is provided to surveyed power plane using DC power supply
The low current power supply of grade, typically 0 to the low current between 1A.Then automatic test or manual test means are used, it is right
Each sample point chosen carries out voltage measurement, and saves result.
Wherein, automatic test can using communication equipment producer automatic test platform realize, the test platform by
The composition such as backstage computer, manipulator, oscillograph, equipment under test.It can be measured point coordinate typing to test script, then by machine
The mobile oscilloprobe of tool hand navigates to each coordinate points and is tested automatically, and test result is saved to backstage computer.
(4), S104 is executed, percentage statistics, normalized are carried out to each sample point measured result, to sort out each
The test result report of test point.Since each sample point is all the small voltage of mV rank, absolute value of voltage is smaller, so calculating
The percentage between the surveyed voltage of each sample point and the power plane voltage class and make normalized out, sorts out comprising each
The test result report of test point.
Wherein, normalized this can be implemented so that test point maximum for percentages, be normalized to 1；Remaining
Each point converses corresponding normalized value according to the proportionate relationship between its percentages and this test point respectively.
(5), S105 is executed, the red doubtful short-circuited region for marking out power plane is added in a manner of graphical interfaces.First with
The mode of graphical interfaces is distributed in each device in power plane in power plane by coordinate position.It is then introduced into above-mentioned test
As a result report, and use different HTML color codes, according to above-mentioned normalized value from big to small, color code color from indigo plant to
Huang arrive the red principle gradually deepened, color separation display power plane on each tested sample point device.Normalized value is smaller, corresponding
Device color is redder, then the most red region of color is the small range region of doubtful short circuit.
As long as tested sample point in step S102 is chosen, regional scope is wider and quantity in each region is more, that
Red area is more concentrated, is more obvious, and here it is the small range regions of doubtful short circuit.
(6), S106 is executed, is then checked in the small range region using prior art means, until looking for
Short dot out.
(7), S107, process terminate.
The present invention is described in detail above, for those of ordinary skill in the art, according to an embodiment of the present invention
Thought, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be construed as to this hair
Bright limitation.
Claims (6)
1. a kind of detection system of power plane short circuit, which is characterized in that including voltage measurement unit, data processing unit and
Short-circuited region adds red mark unit；
The test result of voltage measurement unit is input to data processing unit；
Data processing unit is used to carry out percentage statistics, normalized to each sample point measured result, to sort out each
The test result report of test point；
The test result report of data processing unit is input to short-circuited region and adds red mark unit.
2. a kind of detection system of power plane short circuit according to claim 1, which is characterized in that the voltage measurement
Unit includes DC power supply power supply unit, tested sample point selection unit and test cell；DC power supply power supply unit is for giving
Surveyed power plane provides the low current power supply of the voltage class；Tested sample point selection unit is for selecting the power supply flat
Measured point on face；Test cell is used to carry out voltage measurement to selected sample point.
3. a kind of detection method of the detection system of power plane short circuit according to claim 1, which is characterized in that including
Following steps:
Step 1, the problem of excluding power module itself
Power module in veneer in this power plane is removed, investigation whether short circuit caused by power module；
If detecting at this time, power plane is not short-circuit, describes the problem out in power module, replacement or maintenance power module；If
Power plane still short circuit, then failure needs further to detect down in plate interior power plane, carries out step 2；
Step 2, each tested sample point is chosen
Select the pin of the passive device and active device in the power plane in different zones as tested sample point；
Step 3, voltage measurement is carried out
The low current power supply of the voltage class is provided to surveyed power plane using DC power supply, electric current is 0 between 1A；
Then automatic test or manual test means are used, voltage measurement are carried out to each sample point of selection, and save result；
Step 4, percentage statistics, normalized are carried out to each sample point measured result, to sort out the survey of each test point
Test result report；Since each sample point is all the small voltage of mV rank, absolute value of voltage is smaller, so calculating each sample point
Percentage between surveyed voltage and the power plane voltage class simultaneously makees normalized, sorts out the survey comprising each test point
Test result report；
Step 5, the red doubtful short-circuited region for marking out power plane is added in a manner of graphical interfaces；
Each device in power plane is distributed in power plane by coordinate position first in a manner of graphical interfaces；
Be then introduced into above-mentioned test result report, and use different HTML color codes, according to above-mentioned normalized value from greatly to
For small, color code color to the red principle gradually deepened from indigo plant to Huang, color separation shows the device of each tested sample point in power plane
Part；
Step 6, it is then checked in the small range region using prior art means, until finding out short dot.
4. a kind of detection method of power plane short circuit as claimed in claim 3, which is characterized in that oneself in the step 3
Dynamicization test, using communication equipment producer automatic test platform realize, the test platform include backstage computer, manipulator,
Oscillograph, equipment under test；Measured point coordinate typing to test script, then navigated to respectively by the mobile oscilloprobe of manipulator
Coordinate points are tested automatically, and test result is saved to backstage computer.
5. a kind of detection method of power plane short circuit as claimed in claim 3, which is characterized in that returning in the step 4
One change processing is achieved: test point maximum for percentages is normalized to 1；Remaining each point is according to its percentage number
Proportionate relationship between value and this test point, converses corresponding normalized value respectively.
6. a kind of detection method of power plane short circuit as claimed in claim 3, which is characterized in that the passive device packet
Resistance, capacitor, diode, mos pipe are included but are not limited to, active device includes various chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811387920.8A CN109581187A (en) | 2018-11-21 | 2018-11-21 | A kind of detection method of power plane short circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811387920.8A CN109581187A (en) | 2018-11-21 | 2018-11-21 | A kind of detection method of power plane short circuit |
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| Publication Number | Publication Date |
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| CN109581187A true CN109581187A (en) | 2019-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811387920.8A Pending CN109581187A (en) | 2018-11-21 | 2018-11-21 | A kind of detection method of power plane short circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114252801A (en) * | 2021-12-10 | 2022-03-29 | 四川长虹电器股份有限公司 | Detection and graphical display method for local dimming module in liquid crystal television |
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|---|---|---|---|---|
| CN201716386U (en) * | 2010-06-24 | 2011-01-19 | 中兴通讯股份有限公司 | Detection device for power supply short-circuit point on circuit board |
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| JP2013250098A (en) * | 2012-05-30 | 2013-12-12 | Sharp Corp | Method and apparatus for detecting wiring defect, and method for manufacturing wiring board |
| CN203502538U (en) * | 2013-10-24 | 2014-03-26 | 成都航天通信设备有限责任公司 | Positioning apparatus for short circuit point of circuit board |
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Application publication date: 20190405 |