CN109031088A - A kind of circuit board multichannel current test method and its system - Google Patents
A kind of circuit board multichannel current test method and its system Download PDFInfo
- Publication number
- CN109031088A CN109031088A CN201810595917.9A CN201810595917A CN109031088A CN 109031088 A CN109031088 A CN 109031088A CN 201810595917 A CN201810595917 A CN 201810595917A CN 109031088 A CN109031088 A CN 109031088A
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- China
- Prior art keywords
- circuit board
- channel
- electric current
- current
- normal
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Classifications
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
Abstract
The invention discloses a kind of circuit board multichannel current test method and its systems.Circuit board testing technical field solves the problems, such as that circuit board multichannel electric current detection efficiency is low.The circuit board multichannel current test method, comprising steps of S1: selecting corresponding test fixture according to the model of circuit board under test；S2: the electric current of multiplexer channel on circuit board is tested one by one；S3: judging whether the electric current in each channel is limiting in range, if so, the channel is normal, if it is not, the then channel abnormal；S4: the normal or abnormal state in tested channel is shown.By circuit board multichannel current detecting system, each paths of detection circuit board one by one automatically, compared with originally using multimeter one by one detection test points, the detection efficiency for the circuit board multichannel electric current being greatly improved.
Description
Technical field
The present invention relates to circuit board testing technical field, in particular to a kind of circuit board multichannel current test method and its it is
System.
Background technique
Industry control circuit board damage is usually some component wear, it may be possible to some chip, some capacitor or even one
A slight resistance, the process of maintenance are exactly to find out the element of damage to be replaced.This is seemed simply, needs profound actually
It asks, the expensive detection device of experience abundant and indispensability, fault element is especially quickly found, other than experienced
Maintenance Engineer is more required to have the quick thinking for being good at analyzing and judge.The detection method of several circuit boards below:
1, signal injection method: this method is to use the different output signals of outside source as known test signal, and utilize quilt
The terminal indicator of inspection electronic equipment shows test result, when inspection, according to specific requirement, selects corresponding signal source, obtains
The known signal of different indexs is injected from rear class to prime inspection since the input terminal of the terminal indicator of tested equipment
Then known signal is successively elapsed from late-class circuit to front stage circuits.Known, different tests in the maintenance of industrial circuits plate
Signal is injected separately into the input terminal of circuits at different levels, while whether the reaction for observing tested device end face indicator is normal, with this
As the foundation for determining the reason of part existing for failure and analysis failure occur.
2, substitution method: referring to it is the circuit-under-test plate maintenance that replaced with known intact same model, same specification circuit board repair,
It may determine that whether the circuit board repair damages.
3, non-on-line measurement: refer to non-on-line measurement when circuit board repair is not solded into circuit, by measure its each pin it
Between DC resistance and it is known normally compared with the DC resistance between each pin of model circuit board repair, with determination
Whether it is normal.
4, on-line measurement: refer to that on-line measurement method is passed through using voltage measurement method, resistance method of temperature measurement and amperometric etc.
Whether each pin voltage value, resistance value and the current value that measuring circuit plate is repaired on circuit normally judge the circuit board repair
Whether damage.
5, parameter testing method: being exactly with the electricity in instrument and meter (such as on-line maintenance tester) test electronic device circuitry
Pressure value, a kind of electronic equipment trouble shooting method of current value, component values, device parameters etc..In general, in cold situation
Lower measurement resistance value measures voltage value, current value in the case where energization, or removes component and measure its relevant parameter.
6, waveform observation method: this is the kinematic testing method of a kind of pair of electronic equipment.It observes electronic equipment by oscillograph
The waveform of trouble location or region of interest, and waveform shape, range parameter, time parameter and the electronic equipment obtained according to test
The difference of normal waveform parameter, analyzing failure cause take maintenance measure, and waveform observation is one in industry control circuit board repair
The test repair method that kind is highly important, energy is quantitative.
The above method is required to successively detect the element on circuit board, and detect one piece of circuit board consumed by when
Between it is longer, the form of sampling observation is generally taken for the circuit board of batch, is unable to reach batch detection circuit board, leads to the electricity of batch
Qualification rate is unable to get guarantee after the factory of road plate.
Summary of the invention
The purpose of the present invention one is to provide a kind of circuit board multichannel current test method, has and improves circuit board multichannel electric current
The advantages of detection efficiency.
Above-mentioned technical purpose one of the invention has the technical scheme that
A kind of circuit board multichannel current test method, which is characterized in that the method includes the steps: S1: according to circuit board under test
Model select corresponding test fixture；S2: the electric current of multiplexer channel on circuit board is tested one by one；S3: judge the electricity in each channel
Whether stream is limiting in range, if so, the channel is normal, if it is not, the then channel abnormal；S4: the normal of tested channel is shown
Or abnormality.
Further, the method that the step S3 tests the electric current of multiplexer channel on circuit board one by one specifically: successively right
Each measuring point on circuit board is powered, after electric current by a measuring point and with the measuring point it is fully powered-off after be powered again with next measuring point.
Further, the tested channel is shown while the step S4 shows the normal or abnormal state in tested channel
Electric current.
The purpose of the present invention two is to provide a kind of circuit board multichannel current detecting system, has and improves circuit board multichannel electric current
The advantages of detection efficiency.
Above-mentioned technical purpose two of the invention has the technical scheme that
A kind of circuit board multichannel current detecting system, the system comprises: test fixture is used for fixing circuit board；Current acquisition
Module is connected with test fixture, for testing the electric current of multiplexer channel on circuit board one by one；Processor, with current acquisition module
It is connected, judges whether the electric current in each channel is limiting in range, if so, the channel is normal, if it is not, the then channel abnormal；It is aobvious
Show module, be connected with processor, for showing the normal or abnormal state in tested channel.
Further, the current acquisition module tests the electric current of multiplexer channel on circuit board one by one specifically: successively right
Each measuring point on circuit board is powered, after electric current by a measuring point and with the measuring point it is fully powered-off after be powered again with next measuring point.
Further, it is also used to show the quilt while display module shows the normal or abnormal state in tested channel
Survey the electric current in channel.
Further, the processor is host computer.
Further, the display module is display.
In conclusion the invention has the following advantages: being examined one by one automatically by circuit board multichannel current detecting system
Each paths of slowdown monitoring circuit plate, with the circuit board Multi-path electricity originally using multimeter one by one compared with detection test points, being greatly improved
The detection efficiency of stream.
Detailed description of the invention
Fig. 1 is the method flow diagram of the embodiment of the present invention；
Fig. 2 is the system block diagram of the embodiment of the present invention；
Fig. 3 is the display interface figure of display of the embodiment of the present invention.
In figure, 1, test fixture；2, current acquisition module；3, processor；4, display module.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the protection scope of invention.
A kind of circuit board multichannel testing current method flow diagram as shown in Figure 1, comprising steps of
S1: corresponding test fixture 1 is selected according to the model of circuit board under test；
Specifically, since the circuit board model of each model is different, the arrangement of electronic component above be will be different, and test clip
Tool 1 must avoid electronic component to clamp circuit board, therefore different circuit boards need to correspond to different test furniture.
S2: the electric current of multiplexer channel on circuit board is tested one by one；
Specifically, in order to avoid the detection of multiplexer channel during each paths electric current of test circuit board interferes with each other, because
This is specifically answered in the method for testing the electric current of multiplexer channel on circuit board one by one are as follows: successively it is powered to each measuring point on circuit board,
After electric current by a measuring point and with the measuring point it is fully powered-off after again with next measuring point be powered.
S3: judging whether the electric current in each channel is limiting in range, if so, the channel is normal, if it is not, then the channel is different
Often；
Specifically, when the electric current in channel is normal, which should be in a restriction range, and under the range has the upper limit also to have
Limit.
S4: the normal or abnormal state in tested channel is shown.
Specifically, when showing whether tested channel is normal, it may also display the size of current in the channel.
A kind of circuit board multichannel testing current system block diagram as shown in Figure 2.Including the test clip for fixing circuit board
Tool 1;For testing the current acquisition module 2 of the electric current of multiplexer channel on circuit board one by one;For judging that the electric current in each channel is
It is no to limit in range, if so, the channel is normal, if it is not, the then processor 3 of the channel abnormal；It is connected with processor 3, uses
In the display module 4 for the normal or abnormal state for showing tested channel.
Then test fixture 1, inside pass through comprising testing button and cable etc. for test product to be put into fixture
Cable contacts to transmit test signal with each measuring point of test product.The current processing process of processor 3 is completed by test software, is surveyed
Examination software is then made of drive software and automatic test equipment application software, and drive software and automatic testing software use level
Architecture design is mainly responsible for controls switching and collecting test values such as resource apparatus, control equipment, realizes automatic judgement function
Energy.
In an embodiment of the present invention, display module 4 is display, and the display interface of display is as shown in figure 3, in circle
Color be used for it is normal when the state of display circuit board channel or abnormal, can red and green indicate.May be used also below circle
The detection size of current of display channel.In another embodiment, display module 4 can also be made of signal lamp and led charactron, point
State and size of current are not shown.
In an embodiment of the present invention, processor 3 is host computer, is also possible to single-chip microcontroller, the processing that specially designs is set
It is standby etc..
In an embodiment of the present invention, 2 accuracy class of current acquisition module: 0.5%FS；Range: electric current: 0.2-0.5ADC
(terminal-type input);Voltage: 0-36V DC；Perforation input aperture: Φ 8.5mm；Operating temperature: -20 DEG C~+60 DEG C；Data are more
The new time: 100mS；Accessory power supply: 12V DC；Rated disspation: < 5W；Output interface: RS-485；Communication baud rate: 9600,
19200,38400,115200 bps；Data format: no parity check, 8 data bit, 1 stop position.
Claims (8)
1. a kind of circuit board multichannel current test method, which is characterized in that the method includes the steps:
S1: corresponding test fixture (1) is selected according to the model of circuit board under test；
S2: the electric current of multiplexer channel on circuit board is tested one by one；
S3: judging whether the electric current in each channel is limiting in range, if so, the channel is normal, if it is not, the then channel abnormal；
S4: the normal or abnormal state in tested channel is shown.
2. a kind of circuit board multichannel current test method according to claim 1, which is characterized in that the step S3 is one by one
The method for testing the electric current of multiplexer channel on circuit board specifically: be successively powered to each measuring point on circuit board, pass through to electric current
One measuring point and with the measuring point it is fully powered-off after again with next measuring point be powered.
3. a kind of circuit board multichannel current test method according to claim 1, which is characterized in that the step S4 is shown
The electric current in the tested channel is shown while the normal or abnormal state in tested channel.
4. a kind of circuit board multichannel current detecting system, which is characterized in that the system comprises:
Test fixture (1) is used for fixing circuit board；
Current acquisition module (2) is connected, for testing the electric current of multiplexer channel on circuit board one by one with test fixture (1)；
Processor (3) is connected with current acquisition module (2), judges whether the electric current in each channel is limiting in range, if so,
The channel is normal, if it is not, the then channel abnormal；
Display module (4) is connected with processor (3), for showing the normal or abnormal state in tested channel.
5. a kind of circuit board multichannel current detecting system according to claim 4, which is characterized in that the current acquisition mould
Block (2) tests the electric current of multiplexer channel on circuit board one by one specifically: successively it is powered to each measuring point on circuit board, it is logical to electric current
Cross a measuring point and with the measuring point it is fully powered-off after again with next measuring point be powered.
6. a kind of circuit board multichannel current detecting system according to claim 4, which is characterized in that the display module
(4) it is also used to show the electric current in the tested channel while showing the normal or abnormal state in tested channel.
7. a kind of circuit board multichannel current detecting system according to claim 4, which is characterized in that the processor (3)
For host computer.
8. a kind of circuit board multichannel current detecting system according to claim 4, which is characterized in that the display module
It (4) is display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810595917.9A CN109031088A (en) | 2018-06-11 | 2018-06-11 | A kind of circuit board multichannel current test method and its system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810595917.9A CN109031088A (en) | 2018-06-11 | 2018-06-11 | A kind of circuit board multichannel current test method and its system |
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| Publication Number | Publication Date |
|---|---|
| CN109031088A true CN109031088A (en) | 2018-12-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201810595917.9A Pending CN109031088A (en) | 2018-06-11 | 2018-06-11 | A kind of circuit board multichannel current test method and its system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488178A (en) * | 2019-08-27 | 2019-11-22 | 厦门炬研电子科技有限公司 | A kind of circuit board automatic testing circuit |
| CN110687373A (en) * | 2019-09-30 | 2020-01-14 | 上海御渡半导体科技有限公司 | Detection structure and method of ATE system |
| CN113504395A (en) * | 2021-08-05 | 2021-10-15 | 上海御渡半导体科技有限公司 | Method for detecting connectivity of ATE channel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1378088A (en) * | 2001-02-19 | 2002-11-06 | 日本电产丽德株式会社 | Circuit board detection equipment and circuit board detection method |
| CN101315409A (en) * | 2007-05-28 | 2008-12-03 | 比亚迪股份有限公司 | Mobile phone circuit board testing method |
| CN103792399A (en) * | 2014-01-15 | 2014-05-14 | 中科华核电技术研究院有限公司北京分公司 | Test clamp of multi-channel input-output circuit board |
| CN204666710U (en) * | 2015-06-12 | 2015-09-23 | 浙江嘉蓝海洋电子有限公司 | For the Multi-path electricity current detection circuit of boats and ships |
-
2018
- 2018-06-11 CN CN201810595917.9A patent/CN109031088A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1378088A (en) * | 2001-02-19 | 2002-11-06 | 日本电产丽德株式会社 | Circuit board detection equipment and circuit board detection method |
| CN101315409A (en) * | 2007-05-28 | 2008-12-03 | 比亚迪股份有限公司 | Mobile phone circuit board testing method |
| CN103792399A (en) * | 2014-01-15 | 2014-05-14 | 中科华核电技术研究院有限公司北京分公司 | Test clamp of multi-channel input-output circuit board |
| CN204666710U (en) * | 2015-06-12 | 2015-09-23 | 浙江嘉蓝海洋电子有限公司 | For the Multi-path electricity current detection circuit of boats and ships |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488178A (en) * | 2019-08-27 | 2019-11-22 | 厦门炬研电子科技有限公司 | A kind of circuit board automatic testing circuit |
| CN110687373A (en) * | 2019-09-30 | 2020-01-14 | 上海御渡半导体科技有限公司 | Detection structure and method of ATE system |
| CN113504395A (en) * | 2021-08-05 | 2021-10-15 | 上海御渡半导体科技有限公司 | Method for detecting connectivity of ATE channel |
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Application publication date: 20181218 |