CN106597257A - Testing device for core board and testing method thereof - Google Patents
Testing device for core board and testing method thereof Download PDFInfo
- Publication number
- CN106597257A CN106597257A CN201611189235.5A CN201611189235A CN106597257A CN 106597257 A CN106597257 A CN 106597257A CN 201611189235 A CN201611189235 A CN 201611189235A CN 106597257 A CN106597257 A CN 106597257A
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- Prior art keywords
- core board
- pin
- pins
- chip
- detection
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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
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
- G01R31/2843—In-circuit-testing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Electronic Circuits (AREA)
Abstract
The invention relates to a testing device for a core board and a testing method thereof. Compared with prior art, the testing device and the testing method have an advantage of high difficulty in performing function testing on the core board. The testing device comprises a testing tool assembly. The testing tool assembly comprises a bottom box. A vertical arm and a needle bed are vertically mounted on the upper surface of the bottom box. A function testing board is mounted in the bottom box. The function testing board is connected with the needle bed through probes. The upper part of the vertical arm is provided with a handle and furthermore the handle is in rotatable fit with the vertical arm. One end of a pressing rod is mounted on the rod body of the handle and furthermore is in rotatable fit with the rod body of the handle. The other end of the pressing rod is provided with a pressing block. The core board is placed on the needle bed. When the handle is downwards pressed, the pressing block presses the core board into the needle bed and furthermore the pins of the core board contact with the probes. The testing device and the testing method thereof can find out a faulted core board through testing and furthermore can find out a faulted pin on the faulted core board, thereby satisfying a maintenance requirement of the core board.
Description
Technical field
The present invention relates to technical field of circuit board detection, a kind of specifically detection means and its inspection for core board
Survey method.
Background technology
Core board is that it is integrated with CPU, storage and sets by one piece of electronics mainboard of the Core Feature packing encapsulation of MINI PC
Standby and pin, is linked together so as to realize the System on Chip/SoC of specific area by pin and supporting base plate, and it is in electric power data
It is used widely in collection field.Particularly in electric power information collection system, carrier based on core board possesses independent
Design system and structure.After the completion of core board design, the detection to core board is then difficult to, often only by other base plate peaces
Install into and after loading procedure, just can be detected accordingly.But now can only also detect the quality of core board, cannot find
Core board pin fails, can only carry out the integral replacing of core board, it is impossible to carry out the maintenance of core board.And core board is as integrated
Package parts, it is namely at pin that comparatively its stability preferably, is easily produced at failure.
Therefore, how to develop it is a kind of be directed to the device that core board and its pin detected and have become urgent need solve
Technical problem.
The content of the invention
The invention aims to solve the defect for being difficult to carry out core board Function detection in prior art, there is provided one
Plant detection means and its detection method for core board to solve the above problems.
To achieve these goals, technical scheme is as follows：
A kind of detection means for core board, including test fixture component, described test fixture component includes under casing, under casing
Upper surface be vertically installed with armstand and needle-bar, functional test plate is installed under casing, functional test plate is by probe and needle-bar
Connect,
Described armstand top is provided with handle and handle is constituted with armstand and is rotatably assorted, and one end of depression bar is arranged on the bar of handle
Constitute on body and with the body of rod of handle and be rotatably assorted, the other end of depression bar is provided with briquetting, and core board is placed on needle-bar, works as hand
When handle is pushed, core board is pressed in needle-bar briquetting and the pin of core board contacts with probe.
Described functional test plate includes power circuit and AccessPort mouth connection circuit, described AccessPort mouth connection
Circuit includes being serially connected with electric capacity C48, core between chip U12 and No. 1 pin, No. 3 pins of debugging interface socket X3, chip U12
Electric capacity C49 is serially connected between No. 4 pins, No. 5 pins of piece U12, No. 9 pins of chip U12 are defeated with TTL/CMOS receivers
Go out end to be connected, No. 10 pins of chip U12 be connected with the input of TTL/CMOS drivers, No. 8 pins of chip U12 and tune
No. 2 pins of examination interface socket X3 are connected, and No. 7 pins of chip U12 are connected with No. 3 pins of debugging interface socket X3, core
No. 16 pins of piece U12 connect+3.3V output voltages, No. 15 pins ground connection of chip U12.
Described power circuit includes voltage stabilizing chip SP1117 and 14 pin socket X6, No. 1 pin of voltage stabilizing chip SP1117
Connect with 14 pin socket X6, No. 3 pins of voltage stabilizing chip SP1117 ground connection, it is defeated that No. 2 pins of voltage stabilizing chip SP1117 meet+3.3V
Go out voltage ,+3.3V output voltages are sequentially connected in series after Light-Emitting Diode HL1 and current-limiting resistance R157 and are grounded.
Also include LCDs, LCDs is connected on the signal output part of functional test plate.
A kind of detection method of the detection means for core board, comprises the following steps：
Upper electro-detection, 14 pin socket X6 of power circuit switch on power, and judge whether Light-Emitting Diode HL1 lights, and light then table
Show that functional test plate is powered normally, it is non-lit up then to represent functional test plate abnormal electrical power supply；
Program is loaded, and AccessPort mouth connection circuit is loaded into detection program, and preparation is detected to core board；
The detection of core board, functional test plate is detected to core board.
The detection of described core board is comprised the following steps：
The I/O pin of core board is set to into 0 so as in test mode；
The AD sampled values of the I/O pin of core board are read, if being 3.3V, then it represents that core board is connected normally with functional test plate；
If occurring not for the phenomenon of 3.3V, then it represents that core board is connected exception and fault-free with functional test plate；
I/O pin detects that an I/O pin of core board is set to into output 1, and the corresponding AD of an I/O pin for judging core board is adopted
Whether sample value is changed into 0V, if change, an I/O pin is normal；If not changing, an I/O pin is labeled as failure pin；
Successively I/O pin detection is carried out to other I/O pins of core board, until all I/O pins of core board are detected and finished,
In liquid crystal display screen display result.
Beneficial effect
A kind of detection means and its detection method for core board of the present invention, can not only detect compared with prior art
Problem core board can also detect the fault pin of the core board that goes wrong, and meet the maintenance needs of core board.By test fixture
The design of component, enabling reliable detection, then corresponding detection method in addition are carried out to core board, directly shows trouble point
Out.With simple structure, using it is portable the characteristics of.
Description of the drawings
Fig. 1 is the structural representation of test fixture component in the present invention；
Fig. 2 is the circuit connection diagram of power circuit in the present invention；
Fig. 3 is the circuit connection diagram that AccessPort mouth connects circuit in the present invention；
Fig. 4 is the method precedence diagram of detection method in the present invention；
Wherein, 1- under casings, 2- armstands, 3- needle-bars, 4- handles, 5- depression bars, 6- briquettings, 7- probes.
Specific embodiment
Effect to make the architectural feature to the present invention and reached has a better understanding and awareness, to preferably
Embodiment and accompanying drawing coordinate detailed description, are described as follows：
As shown in figure 1, a kind of detection means for core board of the present invention, including test fixture component, test fixture
Component is used to fix core board, and makes core board and functional test plate effective contact.Test fixture component includes under casing 1, under casing 1
Upper surface be vertically installed with armstand 2 and needle-bar 3, functional test plate is connected by probe 7 with needle-bar 3.Install under casing 1 active
Can test board, for the optimization of functional test plate, can be to set communication interface in the sidepiece of under casing 1, with can be to functional test plate
It is optimized upgrading.
The top of armstand 2 is provided with handle 4 and handle 4 is constituted with armstand 2 and is rotatably assorted, and handle 4 can pass through the side of riveting
Formula is arranged in armstand 2, and handle 4 can be rotated in armstand 2.One end of depression bar 5 be arranged on handle 4 the body of rod on and with
The body of rod of handle 4 is constituted and is rotatably assorted, and equally, depression bar 5 can also be arranged on the body of rod of handle 4 by way of riveting, pressure
Bar 5 can be rotated on the body of rod of handle 4.The other end of depression bar 5 is provided with briquetting 6, and briquetting 6 is for depressing core board.
Core board is placed on needle-bar 3, when handle 4 is pushed, briquetting 6 by core board be pressed into needle-bar 3 in and core board pin with visit
Pin 7 contacts, so that core board is fully contacted with probe 7, so as to connect with functional test plate.Use for convenience, function
LCDs can also conventionally be connected on the signal output part of test board.
Functional test plate includes power circuit and AccessPort mouth connection circuit, and power circuit is supplied for functional test plate
Electricity, AccessPort mouth connection circuit is used to for test program to copy into core board.As shown in figure 3, AccessPort mouth connection circuit bag
Include chip U12 and debugging interface socket X3.Chip U12 is RS232 transceivers, and debugging interface socket X3 is debugging interface.Chip
Electric capacity C48 is serially connected between No. 1 pin, No. 3 pins of U12, between No. 4 pins, No. 5 pins of chip U12 electric capacity is serially connected with
No. 9 pins of C49, chip U12 are connected with the output end of TTL/CMOS receivers, No. 10 pins of chip U12 with and TTL/
The input of cmos driver is connected, and No. 8 pins of chip U12 are connected with No. 2 pins of debugging interface socket X3, chip U12
No. 7 pins be connected with No. 3 pins of debugging interface socket X3, No. 16 pins of chip U12 connect+3.3V output voltages, core
No. 15 pins ground connection of piece U12.
As shown in Fig. 2 power circuit includes voltage stabilizing chip SP1117 and 14 pin socket X6, voltage stabilizing chip SP1117 is 3.3V
LDO linear voltage regulators, 14 pin socket X6 be plug-in socket.No. 1 pin of voltage stabilizing chip SP1117 connects with 14 pin socket X6,
No. 3 pins ground connection of voltage stabilizing chip SP1117, No. 2 pins of voltage stabilizing chip SP1117 connect+3.3V output voltages ,+3.3V outputs
Voltage is sequentially connected in series after Light-Emitting Diode HL1 and current-limiting resistance R157 and is grounded, and after power on, Light-Emitting Diode HL1 is by point
It is bright.
As shown in figure 4, here also provides a kind of detection method of the detection means for core board, comprise the following steps：
The first step, upper electro-detection.14 pin socket X6 of power circuit switch on power, and judge whether Light-Emitting Diode HL1 lights, point
It is bright, represent that functional test plate is powered normally, it is non-lit up then to represent functional test plate abnormal electrical power supply.
Second step, program loading.AccessPort mouth connection circuit is loaded into detection program, and preparation is examined to core board
Survey.
3rd step, the detection of core board, functional test plate detects that it is comprised the following steps that to core board：
（1）The I/O pin of core board is set to into 0 so as in test mode.Set to 0 to be tested in the I/O pin of this core board
Pattern, the I/O pin of core board puts 1 for normal procedure pattern.
（2）Read the AD sampled values of the I/O pin of core board.Due to here, the I/O pin of core board has been set to 0, core board
Connected with functional test plate on test fixture component, because functional test plate has served in the first step 3.3V
Voltage, then the core board connected with functional test plate should also serve relevant voltage, then illustrate that this pin function is normal.
This, if the AD sampled values for reading the I/O pin of core board are 3.3V, illustrates that core board is connected normally with functional test plate, and
And core board detection is normal.
If occurring not for the phenomenon of 3.3V, then it represents that core board is connected abnormal with functional test plate, i.e., exist on core board
Pin is connected exception with functional test plate or the pin of core board has failure, in actual applications, due to being used for surveying
Trial work arrangement, the pin of core board is obtained and be adequately inserted needle-bar 3, that is to say, that under normal circumstances, is substantially not in core
The pin of plate is connected the problem of exception with functional test plate, therefore, here is attributed to the pin of core board and there is failure mostly.For
Specific fault pin is found, here uses I/O pin detection method.
（3）I/O pin is detected.A number I/O pin of core board is set to into output 1, an I/O pin pair of core board is judged
Whether the AD sampled values answered are changed into 0V.A number I/O pin of core board is set to 0 in initially test, and it obtains the voltage of 3.3V,
Or due to pin fails, it is obtained not for the voltage of 3.3V.Here, an I/O pin of core board is set to into output 1, Ji Jiangyi
Number I/O pin is converted to program schema, i.e., No. one I/O pin and does not receive 3.3V voltages, then the now corresponding AD of I/O pin
If sampled value is changed into 0V, illustrate that an I/O pin is normal, I/O pin can meet the test pattern and journey between 0 and 1
Sequence pattern switches.If an I/O pin is not changed in, an I/O pin is labeled as failure pin, IO cannot meet 0 and 1 it
Between test pattern and program schema switch.
（4）Successively I/O pin detection is carried out to other I/O pins of core board, that is, carry out I/O pin output 1, judge voltage
The operation whether value changes, until all I/O pins of core board are detected and finished, in liquid crystal display screen display result.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
The simply present invention of the personnel it should be appreciated that the present invention is not restricted to the described embodiments, described in above-described embodiment and specification
Principle, without departing from the spirit and scope of the present invention the present invention also have various changes and modifications, these change and
Improvement is both fallen within the range of claimed invention.The protection domain of application claims by appending claims and its
Equivalent is defined.
Claims (6)
1. a kind of detection means for core board, including test fixture component, described test fixture component includes under casing
（1）, under casing（1）Upper surface be vertically installed with armstand（2）And needle-bar（3）, under casing（1）Functional test plate, function are inside installed
Test board passes through probe（7）With needle-bar（3）Connect,
It is characterized in that：Described armstand（2）Top is provided with handle（4）And handle（4）With armstand（2）Composition is rotatably assorted,
Depression bar（5）One end be arranged on handle（4）The body of rod on and and handle（4）The body of rod constitute be rotatably assorted, depression bar（5）It is another
End is provided with briquetting（6）, core board is placed on needle-bar（3）On, work as handle（4）When pushing, briquetting（6）Core board is pressed into into needle-bar
（3）Interior and core board pin and probe（7）Contact.
2. a kind of detection means for core board according to claim 1, it is characterised in that：Described functional test plate
Including power circuit and AccessPort mouth connection circuit, described AccessPort mouth connection circuit includes that chip U12 and debugging connect
Mouthful socket X3, is serially connected with electric capacity C48 between No. 1 pin, No. 3 pins of chip U12, No. 4 pins of chip U12, No. 5 pins it
Between be serially connected with electric capacity C49, No. 9 pins of chip U12 are connected with the output end of TTL/CMOS receivers, and No. 10 of chip U12 are drawn
Pin be connected with the input of TTL/CMOS drivers, No. 8 pins of chip U12 and No. 2 pin phases of debugging interface socket X3
Even, No. 7 pins of chip U12 are connected with No. 3 pins of debugging interface socket X3, and it is defeated that No. 16 pins of chip U12 meet+3.3V
Go out voltage, No. 15 pins ground connection of chip U12.
3. a kind of detection means for core board according to claim 2, it is characterised in that：Described power circuit bag
Voltage stabilizing chip SP1117 and 14 pin socket X6 are included, No. 1 pin of voltage stabilizing chip SP1117 connects with 14 pin socket X6, voltage stabilizing chip
No. 3 pins ground connection of SP1117, No. 2 pins of voltage stabilizing chip SP1117 connect+3.3V output voltages, and+3.3V output voltages are successively
It is grounded after concatenation Light-Emitting Diode HL1 and current-limiting resistance R157.
4. a kind of detection means for core board according to claim 2, it is characterised in that：Also include liquid crystal display
Screen, LCDs is connected on the signal output part of functional test plate.
5. the detection method of a kind of detection means for core board according to claim 4, it is characterised in that include with
Lower step：
51）Upper electro-detection, 14 pin socket X6 of power circuit switch on power, and judge whether Light-Emitting Diode HL1 lights, and light then
Represent that functional test plate is powered normally, it is non-lit up then to represent functional test plate abnormal electrical power supply；
52）Program is loaded, and AccessPort mouth connection circuit is loaded into detection program, and preparation is detected to core board；
53）The detection of core board, functional test plate is detected to core board.
6. the detection method of a kind of detection means for core board according to claim 5, it is characterised in that described
The detection of core board is comprised the following steps：
61）The I/O pin of core board is set to into 0 so as in test mode；
62）The AD sampled values of the I/O pin of core board are read, if being 3.3V, then it represents that core board is connected just with functional test plate
Often；If occurring not for the phenomenon of 3.3V, then it represents that core board is connected exception and fault-free with functional test plate；
63）I/O pin detection, by an I/O pin of core board output 1 is set to, and judges that an I/O pin of core board is corresponding
Whether AD sampled values are changed into 0V, if change, an I/O pin is normal；If not changing, an I/O pin is labeled as failure
Pin；
64）Successively I/O pin detection is carried out to other I/O pins of core board, until all I/O pins of core board have been detected
Finish, in liquid crystal display screen display result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611189235.5A CN106597257A (en) | 2016-12-21 | 2016-12-21 | Testing device for core board and testing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611189235.5A CN106597257A (en) | 2016-12-21 | 2016-12-21 | Testing device for core board and testing method thereof |
Publications (1)
| Publication Number | Publication Date |
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| CN106597257A true CN106597257A (en) | 2017-04-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611189235.5A Pending CN106597257A (en) | 2016-12-21 | 2016-12-21 | Testing device for core board and testing method thereof |
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Cited By (2)
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| CN110118925A (en) * | 2019-05-21 | 2019-08-13 | 威创集团股份有限公司 | A kind of core board measuring method and system |
| CN114184187A (en) * | 2021-11-19 | 2022-03-15 | 西安航天精密机电研究所 | Device and method for improving debugging efficiency of digital demodulation circuit for fiber-optic gyroscope |
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| CN114184187A (en) * | 2021-11-19 | 2022-03-15 | 西安航天精密机电研究所 | Device and method for improving debugging efficiency of digital demodulation circuit for fiber-optic gyroscope |
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Application publication date: 20170426 |