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 PDF

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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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CN
China
Prior art keywords
circuit board
channel
electric current
current
normal
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Pending
Application number
CN201810595917.9A
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Chinese (zh)
Inventor
王皓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chengdu Jing Rong Weiye Electronics Co Ltd
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Chengdu Jing Rong Weiye Electronics Co Ltd
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Application filed by Chengdu Jing Rong Weiye Electronics Co Ltd filed Critical Chengdu Jing Rong Weiye Electronics Co Ltd
Priority to CN201810595917.9A priority Critical patent/CN109031088A/en
Publication of CN109031088A publication Critical patent/CN109031088A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28Testing of electronic circuits, e.g. by signal tracer
    • G01R31/2801Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
    • G01R31/281Specific types of tests or tests for a specific type of fault, e.g. thermal mapping, shorts testing
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Engineering & Computer Science (AREA)
  • Test And Diagnosis Of Digital Computers (AREA)
  • Tests Of Electronic Circuits (AREA)

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

A kind of circuit board multichannel current test method and its system
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.
CN201810595917.9A 2018-06-11 2018-06-11 A kind of circuit board multichannel current test method and its system Pending CN109031088A (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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