CN205539367U - PCBA function automatic test system - Google Patents
PCBA function automatic test system Download PDFInfo
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- CN205539367U CN205539367U CN201620281804.8U CN201620281804U CN205539367U CN 205539367 U CN205539367 U CN 205539367U CN 201620281804 U CN201620281804 U CN 201620281804U CN 205539367 U CN205539367 U CN 205539367U
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Abstract
The utility model relates to a PCBA function automatic test system, this system utilizes microprocessor to control the PCBA's that awaits measuring button to the control of electromagnet control subassembly, the messenger is awaited measuring and is burnt test program current test items of automatic switch -over under the control of the PCBA's that awaits measuring button of record among the PCBA in advance, and gather the various signals that the PCBA that awaits measuring generated in real time through sensing device in test procedure, handle through the self -checking test signal of serial ports output the sensor signal and the test jig of sensing device feedback through microprocessor, and show test procedure and test result on the display screen, the final automatic testing of realizing the PCBA's that awaits measuring function, owing to need not artifical manual control test items in test procedure, but the test jig is automatic switch -over test items under microprocessor's control, but also can make tester in situ observation to test state and test result, therefore PCBA functional test's efficiency and accuracy have been improved.
Description
Technical field
This utility model relates to electronic circuit board detection technique field, particularly relates to a kind of PCBA function certainly
Dynamic test system.
Background technology
Printed circuit-board assembly (Printed Circuit Board Assembly, PCBA) is printed circuit board (PCB)
(Printed Circuit Board, PCB) is through surface installation technique (Surface Mount Technology, SMT)
Upper part, then after dual-inline package technology (Dual Inline-Pin Package, DIP) carries out plug-in unit
To through welding and assemble the PCB of electronic component.
Manufacturer is in order to ensure the quality of the PCBA of production, it usually needs PCBA carries out function item by item
Test, to reject PCBA off quality.In current PCBA function test method, mainly have
Manual test and automatic test two kinds, wherein, tester utilizes test instrunment to remove detection electricity the most one by one
Whether each test point on the plate of road meets requirement, and this manual testing process whole process needs manual operation, not only
Testing time length, testing efficiency are low, and are susceptible to erroneous judgement；The method being compared to manual test, from
Dynamic method of testing in hgher efficiency, and the reliability of test result is higher, but current automatically test system
Often cost of uniting is high, and needs periodic maintenance, and maintenance cost is high.
Utility model content
Based on this, it is necessary to for the manual test efficiency test system low, automatic of current PCBA functional test
Unite problem with high costs, it is provided that a kind of PCBA function automatic detection system.
For achieving the above object, this utility model takes following technical scheme:
A kind of PCBA function automatic detection system, described system includes PCBA to be measured is carried out functional test
Testing jig, gather the sensing device of the signal that described PCBA to be measured generates in test process, micro-process
Device, magnet control assembly, display test process and the display screen of test result,
The input port of described microprocessor connects the signal output port of described testing jig and receives described test
The self-checking signal of frame output,
The input port of described microprocessor is also connected with the outfan of described sensing device and receives described sensing dress
Put the transducing signal of transmission,
The output port of described microprocessor connects the control end of described magnet control assembly, described electric magnet
Control assembly under described microprocessor controls, test strain amplifying circuit and the pressing of described PCBA to be measured
Or discharge the button of described PCBA to be measured to switch the current test event of described PCBA to be measured,
The output port of described microprocessor is also connected with the input of described display screen.
Above-mentioned PCBA function automatic detection system utilizes testing jig that PCBA to be measured is carried out functional test, passes
Induction device gathers the signal that generates in test process of PCBA to be measured and is sent to microprocessor, microprocessor
The transducing signal sent according to sensing device and the self-checking signal of testing jig output, analyze and judge currently
Test event is the most qualified, if qualified, magnet control assembly presses under control of the microprocessor or releases
Put the button current test event with switching PCBA to be measured of PCBA to be measured, i.e. according to presetting test program
Carrying out other test events, magnet control assembly can also be to the strain amplifying circuit of PCBA to be measured simultaneously
Testing, test process and test result can also be entered by PCBA function automatic detection system on a display screen
Row display, the final automatic test realizing the function to PCBA to be measured.Due in test process without people
Work Non-follow control test event, PCBA to be measured can automatically switch test event under control of the microprocessor,
But also tester can be made to pass through display screen Real Time Observation to test mode and test result, thus improve
The efficiency of PCBA functional test and accuracy, PCBA function automatic detection system can be with existing simultaneously
Testing jig combine, it is not necessary to the detection device of other complexity is set, therefore system structure is simple, cost relatively
Low, be suitable to actual application.
Accompanying drawing explanation
Fig. 1 is the structural representation of PCBA function automatic detection system in one of them embodiment of this utility model
Figure；
Fig. 2 is that in one of them detailed description of the invention of this utility model, the structure of the first magnet control assembly is shown
It is intended to；
Fig. 3 is that in one of them detailed description of the invention of this utility model, the structure of the second magnet control assembly is shown
It is intended to.
Detailed description of the invention
Below in conjunction with accompanying drawing and preferred embodiment, the technical solution of the utility model is described in detail.
Wherein in an embodiment, shown in Figure 1, a kind of PCBA function automatic detection system, should
System includes carrying out PCBA to be measured the testing jig 100 of functional test, gathers PCBA to be measured and testing
In journey, the sensing device 200 of signal of generation, microprocessor 300, magnet control assembly 400, display are surveyed
The display screen 500 of examination process and test result, the letter of the input port connecting test frame 100 of microprocessor 300
Number output port also receives the self-checking signal of testing jig 100 output, the input port of microprocessor 300
It is also connected with the outfan of sensing device 200 and receives the transducing signal that sensing device 200 sends, microprocessor
The output port of 300 connects the control end of magnet control assembly 400, and magnet control assembly 400 is at Wei Chu
Reason device 300 controls lower strain amplifying circuit and the pressing testing PCBA to be measured or discharges PCBA's to be measured
Button is to switch the current test event of PCBA to be measured, and the output port of microprocessor 300 is also connected with display
The input of screen 500.
At present, in the batch production process of PCBA, often due to equipment and operator are that may be present
Various uncertain factors, cannot ensure that the PCBA producing in batches out all meets production standard not yet, as
Underproof PCBA is applied in product by fruit, it is likely that brings quality problems to product, even causes product
Product damage, therefore in actual production process, it is necessary to detect PCBA producing end, to ensure
The whole PCBA dispatched from the factory are qualified products, the present embodiment just for PCBA Function detection demand and
A kind of PCBA function automatic detection system proposed, specifically, in PCBA to be measured, burning in advance is used for
Test the default test program of PCBA various functions to be measured, burning is preset the PCBA to be measured of test program
Being fixed on testing jig 100, testing jig 100 simulates the actual working environment of PCBA to be measured, to PCBA to be measured
Various functions test, such as measure the voltage of PCBA to be measured, electric current, power and to buzzer,
The test etc. of display lamp, additionally, testing jig 100 is in addition to simulating the actual working environment of PCBA to be measured, also
PCBA to be measured can be carried out self-inspection, such as FLASH test, EEPROM test etc., and by self-inspection
Project testing result is sent to microprocessor 300 by signal output port；The input of microprocessor 300 simultaneously
Port is also connected with the outfan of sensing device 200 and receives the transducing signal that sensing device 200 sends, sensing
The various signals that device 200 Real-time Collection PCBA to be measured generates in test process, such as to buzzer
The acoustical signal generated when testing, the optical signal etc. generated time display lamp is tested, sensing device
200 the various signals collected are converted to transducing signal after be sent to microprocessor 300；Microprocessor 300
Receive self-inspection project testing result and the transducing signal of sensing device 200 transmission, the root of testing jig 100 output
Judge that according to self-inspection project testing result and transducing signal the current test event of PCBA to be measured is the most qualified, as
The most qualified, the end that controls of magnet control assembly 400 realizes under the output port of microprocessor 300 controls
Pressing or discharge the button of PCBA to be measured to switch the current test event of PCBA to be measured, i.e. presets
The next item down test event in test program, magnet control assembly 400 can also be to PCBA to be measured simultaneously
Strain amplifying circuit test, and the output port of microprocessor 300 is also associated with display screen 500
Input, microprocessor 300 can be by the test process of current PCBA to be measured and judge PCBA to be measured
The most qualified result shows on display screen 500.In the present embodiment, sensor, microprocessor,
Magnet control assembly and display screen all can be integrated with testing jig, thus simplify PCBA function and automatically survey
The structure of test system.
Above-mentioned PCBA function automatic detection system utilizes testing jig that PCBA to be measured is carried out functional test, passes
Induction device gathers the signal that generates in test process of PCBA to be measured and is sent to microprocessor, microprocessor
The transducing signal sent according to sensing device and the self-checking signal of testing jig output, analyze and judge currently
Test event is the most qualified, if qualified, magnet control assembly presses under control of the microprocessor or releases
Put the button current test event with switching PCBA to be measured of PCBA to be measured, i.e. according to presetting test program
Carrying out other test events, magnet control assembly can also be to the strain amplifying circuit of PCBA to be measured simultaneously
Testing, test process and test result can also be entered by PCBA function automatic detection system on a display screen
Row display, the final automatic test realizing the function to PCBA to be measured.Due in test process without people
Work Non-follow control test event, PCBA to be measured can automatically switch test event under control of the microprocessor,
But also tester can be made to pass through display screen Real Time Observation to test mode and test result, thus improve
The efficiency of PCBA functional test and accuracy, PCBA function automatic detection system can be with existing simultaneously
Testing jig combine, it is not necessary to the detection device of other complexity is set, therefore system structure is simple, cost relatively
Low, be suitable to actual application.
As a kind of specific embodiment, the sensing device in PCBA function automatic detection system includes photosensitive
Sensor, sound transducer and vibrating sensor, light sensor gather PCBA to be measured display screen or
The optical signal that display lamp generates in test process, sound transducer gathers PCBA to be measured in test process
The acoustical signal generated, vibrating sensor gathers the vibration signal that PCBA to be measured generates in test process.
When PCBA to be measured is tested, the several functions of PCBA to be measured need to be tested, this embodiment party
Test is tied by the signal generated in test process for gathering PCBA to be measured in formula to feed back to microprocessor
The sensing device that fruit is analyzed specifically includes light sensor, sound transducer and vibrating sensor, wherein
The optical signal that display screen or display lamp on PCBA to be measured send is converted into corresponding telecommunications by light sensor
Number i.e. transducing signal transducing signal is sent to microprocessor, microprocessor sends according to light sensor
Transducing signal judges that the display screen on PCBA to be measured or display lamp the most normally work；Sound transducer is adopted
Collect the acoustical signal that PCBA to be measured generates in test process, if the functional test requirement of PCBA to be measured
The highest, sound transducer can utilize and be only capable of sound transducer module with presence or absence of the sound identifying surrounding
Realize, when the functional test precision of PCBA to be measured is higher, then use the sensing being capable of identify that wave volume
Device module realizes, and the acoustical signal of collection is converted into transducing signal and is sent by transducing signal by sound transducer
To microprocessor, microprocessor judges to generate on PCBA to be measured according to the transducing signal that sound transducer sends
The correlation module of acoustical signal the most normally works；Additionally, sensing device also includes pressing close to PCBA's to be measured
The vibrating sensor of vibration module, vibrating sensor gathers the vibration that PCBA to be measured generates in test process
Signal, is converted into vibration signal the signal of telecommunication i.e. transducing signal and transducing signal is sent to microprocessor, micro-
According to the transducing signal that vibrating sensor sends, processor judges that the vibrating function of PCBA to be measured is the most normal.
Present embodiment utilizes light sensor, sound transducer and vibrating sensor to gather PCBA to be measured respectively
Optical signal, acoustical signal and the vibration signal generated in test process, it is achieved PCBA to be measured is shown
Show the several functions synchronism detection of function, vocal function and vibrating function, and synchronism detection result is carried out
Monitoring in real time and feedback, shorten the length of testing speech of PCBA, improve PCBA function automatic detection system
Testing efficiency.
Magnet control assembly in PCBA function automatic detection system can be surveyed under control of the microprocessor
Trying the strain amplifying circuit of PCBA to be measured, magnet control assembly can also be under micro-processor control simultaneously
Press or discharge the button current test event with switching PCBA to be measured of PCBA to be measured, have as one
The embodiment of body, for the function achieved by magnet control assembly, present embodiment proposes to utilize two
Individual magnet control assembly that is first magnet control assembly and the second magnet control assembly, realize electricity respectively
Magnet controls the above-mentioned functions of assembly, and specifically, magnet control assembly includes testing answering of PCBA to be measured
Become the first magnet control assembly of amplifying circuit and pressing or discharge second electromagnetism of button of PCBA to be measured
Ferrum controls assembly, and the control end controlling end and the second magnet control assembly of the first magnet control assembly divides
It is not connected with the output port of microprocessor.In the present embodiment, in PCBA function automatic detection system
Magnet control assembly specifically includes two magnet control assemblies that is first magnet control assembly and the second electricity
Magnet controls assembly, and wherein the end that controls of the first magnet control assembly is connected with the output port of microprocessor,
The strain amplifying circuit of PCBA to be measured tested under micro-processor control by first magnet control assembly；Second
The end that controls of magnet control assembly is also connected with the output port of microprocessor, the second magnet control assembly
Press under micro-processor control or discharge the button of PCBA to be measured to switch the current test of PCBA to be measured
Project, present embodiment utilizes two the first electromagnets being connected with the output port of microprocessor respectively to control
Assembly and the second magnet control assembly realize straining the test of amplifying circuit and current test event respectively
Switching, the two does not interfere with each other, it is ensured that strain amplifying circuit and the stability of current test event switching.
As a kind of specific embodiment, the first magnet control assembly includes the first control end and the first machine
Tool connector, the first mechanical fastener changes the strain in strain amplifying circuit under the first control controlling end
The deformation of sheet；Second magnet control assembly includes the second control end and the second mechanical fastener, the second machinery
Connector presses or discharges the button of PCBA to be measured under the second control controlling end.Originally it is being embodied as
In mode, the first magnet control assembly includes the first control end and the first mechanical fastener, wherein the first control
End processed is connected with the output port of microprocessor, leads to when microprocessor controls the first electromagnet coil controlling end
During power-off, the change of the electromagnetic field that the first mechanical fastener is formed according to electromagnet coil power on/off makes to be measured
Foil gauge in the strain amplifying circuit of PCBA produces corresponding deformation, and then causes straining the defeated of amplifying circuit
Go out signal to change；Additionally, the second magnet control assembly includes that the second control end and second is mechanically connected
Part, wherein the second control end is connected with the output port of microprocessor, when microprocessor controls the second control end
Electromagnet coil power on/off time, the electromagnetism that the second mechanical fastener is formed according to electromagnet coil power on/off
The change of field presses or discharges the button of PCBA to be measured, to control the current test event of PCBA to be measured
Switching.In this embodiment, the first mechanical fastener and the second mechanical fastener all can utilize
The existing mechanical fastener controlled by electromagnet coil realizes, and proposes a kind of optional embodiment here,
The structural representation of the first magnet control assembly shown in Figure 2, wherein the first mechanical fastener includes
Spring, armature and connecting rod, and one end of spring maintains static, the other end with the side of armature fixing even
Connecing, the opposite side of armature fixes the one end connecting connecting rod, and the other end of connecting rod is free end, the most micro-
Processor controls in the first magnet control assembly the break-make of electric current in electromagnet coil, when in electromagnet coil
When having electric current, armature drives spring and connecting rod to move to direction, foil gauge place under electromagnetic field effect, when
After connecting rod contacts with foil gauge, making foil gauge produce deformation, therefore the first magnet control assembly is at Wei Chu
The lower strain amplifying circuit that can test PCBA to be measured of control of reason device；With the first mechanical fastener similarly,
The structural representation of the second magnet control assembly shown in Figure 3, wherein the second mechanical fastener also wraps
Including spring, armature and connecting rod, and one end of spring maintains static, the side of the other end and armature is fixed
Connecting, the opposite side of armature fixes the one end connecting connecting rod, and the other end of connecting rod is free end, here
Microprocessor controls in the second magnet control assembly the break-make of electric current in electromagnet coil, works as electromagnet coil
In when having electric current, armature drives spring and the connecting rod button place to PCBA to be measured under electromagnetic field effect
Moving in direction, when connecting rod presses or discharges the button of PCBA to be measured, PCBA to be measured is according to presetting
Test program switches current test event, present embodiments provide for being made up of spring, armature and connecting rod
A kind of mechanical fastener, this kind of mechanical fastener has the feature of simple in construction, fast response time, low cost,
For PCBA function automatic detection system be embodied as provide a kind of simple and easy to do embodiment.
As a kind of specific embodiment, PCBA function automatic detection system also includes controlling microprocessor
The test switch of current supply circuit break-make, this test switch accesses the current supply circuit of microprocessor.Present embodiment
The test switch controlling microprocessor power supply loop break-make is increased in PCBA function automatic detection system, when
When the state of test switch is for closing, the current supply circuit of microprocessor disconnects, it is impossible to for microprocessor power supply,
Now PCBA to be measured can not be tested by PCBA function automatic detection system；State when test switch
During for opening, the current supply circuit conducting of microprocessor, can be microprocessor power supply, thus microprocessor can
Processing with the signal receiving it, the test switch in present embodiment is equivalent to PCBA function certainly
The main switch of dynamic test system, before testing, need to open test switch, it is ensured that the normal power supply of microprocessor,
Enable PCBA function automatic detection system that PCBA to be measured to be tested, after being completed, close
Test switch, makes microprocessor power-off, so that user can be according to the actual requirements by test on-off control
PCBA function automatic detection system, it is to avoid the waste of electric energy.Meanwhile, as the optional embodiment of one,
Test switch can be mechanical switch or remote switch, and so-called mechanical switch refers to by physical mechanical mode
The switch of control circuit break-make, such as single-pole double-throw switch (SPDT), key switch etc., remote switch then refers to that user is led to
Cross the switch of electromagnetic wave signal remote control mode control circuit break-make, such as infrared remote control switch, Bluetooth remote control switch
Deng, in the present embodiment, the life-span length of mechanical switch, reliability are high, and circuit is then led to by remote switch
Disconnected control is more convenient, and the most either mechanical switch or remote switch are suitable for this practicality newly
The test switch of type, and the duty of PCBA function test system can be controlled.
As a kind of specific embodiment, the testing jig in PCBA function automatic detection system is that press-down type is surveyed
Examination frame.Press-down type testing jig has the features such as simple in construction, easily manufactured and cost are low, is therefore a kind of
Widely used PCBA testing jig, surveys the function of PCBA utilizing press-down type testing jig to certain hospitality
When testing, press-down type testing jig need to design test flying needle with to be measured for the feature of PCBA to be measured
Test point position consistency on PCBA, and the repertoire of PCBA to be measured can be tested, concrete behaviour
When making press-down type testing jig, first pull up and start handle, discharge top board；After putting into PCBA to be measured, to
Under press hands handle, make top board push down PCBA, and turn on the power switch, start the merit to PCBA to be measured
Can test；After test terminates, turning off the power switch, pull up and start a release top board, taking-up is treated
Survey PCBA.Present embodiment can utilize existing press-down type testing jig to realize PCBA function automatic detection
The testing jig in system, the function of PCBA to be measured tested so that PCBA function automatic detection system
Simple in construction, easily manufactured.
As a kind of specific embodiment, the microprocessor in PCBA function automatic detection system is
STM32F4 series monolithic.STM32F4 series monolithic is that 32 ARM, Cortex-M4 kernels are high
Performance microprocessor, the speed of service reaches 210DMIPS 168MHz, and carries multiple interior peripheral hardware, as
USB-OTG, senior intervalometer, high speed USART, high speed SPI, FSMC interface, 12 ADC etc.,
Therefore present embodiment uses STM32F4 series monolithic to be not only fully able in performance as microprocessor
Meet the requirement of PCBA function automatic detection system, and be conducive to the liter to PCBA function test system
Level extension.
As a kind of specific embodiment, PCBA function automatic detection system shows test process and test
The display screen of result is thin film transistor liquid crystal display screen, and such as, display screen is the TFT (Thin of 1.5 inches
Film Transistor, thin film transistor (TFT)) LCDs.Due to TFT LCDs have panelized,
The advantages such as lightening, high-contrast, low-power consumption, therefore present embodiment uses TFT LCDs conduct
The display screen of PCBA function test system, while simplied system structure, it is ensured that display screen is to test process
With the display effect of test result, for convenience of display screen is carry out demolition and replacement, the TFT in present embodiment
LCDs can be connected with testing jig by cable socket.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the most right
The all possible combination of each technical characteristic in above-described embodiment is all described, but, if these skills
There is not contradiction in the combination of art feature, is all considered to be the scope that this specification is recorded.
Embodiment described above only have expressed several embodiments of the present utility model, its describe more concrete and
In detail, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that, it is right
For those of ordinary skill in the art, without departing from the concept of the premise utility, it is also possible to do
Going out some deformation and improvement, these broadly fall into protection domain of the present utility model.Therefore, this utility model is special
The protection domain of profit should be as the criterion with claims.
Claims (10)
1. a PCBA function automatic detection system, it is characterised in that include PCBA to be measured is carried out merit
Can test testing jig, gather the signal that described PCBA to be measured generates in test process sensing device,
Microprocessor, magnet control assembly, display test process and the display screen of test result,
The input port of described microprocessor connects the signal output port of described testing jig and receives described test
The self-checking signal of frame output,
The input port of described microprocessor is also connected with the outfan of described sensing device and receives described sensing dress
Put the transducing signal of transmission,
The output port of described microprocessor connects the control end of described magnet control assembly, described electric magnet
Control assembly under described microprocessor controls, test strain amplifying circuit and the pressing of described PCBA to be measured
Or discharge the button of described PCBA to be measured to switch the current test event of described PCBA to be measured,
The output port of described microprocessor is also connected with the input of described display screen.
PCBA function automatic detection system the most according to claim 1, it is characterised in that
Described sensing device includes light sensor, sound transducer and vibrating sensor, described light sensor
The optical signal that the display screen of the device described PCBA to be measured of collection or display lamp generate in test process, described
Sound transducer gathers the acoustical signal that described PCBA to be measured generates in test process, described vibrating sensing
Device gathers the vibration signal that described PCBA to be measured generates in test process.
PCBA function automatic detection system the most according to claim 1 and 2, it is characterised in that
Described magnet control assembly include testing described strain amplifying circuit the first magnet control assembly and
Pressing or discharge the second magnet control assembly of described button, described first magnet control assembly and described
The end output port all with described microprocessor that controls of the second magnet control assembly is connected.
PCBA function automatic detection system the most according to claim 3, it is characterised in that
Described first magnet control assembly includes the first control end and the first mechanical fastener, described first machine
Tool connector changes the shape of the foil gauge in described strain amplifying circuit under the described first control controlling end
Become；
Described second magnet control assembly includes the second control end and the second mechanical fastener, described second machine
Tool connector presses under the described second control controlling end or discharges described button.
PCBA function automatic detection system the most according to claim 4, it is characterised in that
Described first mechanical fastener and described second mechanical fastener all include spring, armature and connecting rod,
One end of described spring maintains static, and the other end is fixing with the side of described armature to be connected,
The opposite side of described armature fixes the one end connecting described connecting rod, and the other end of described connecting rod is certainly
By holding.
PCBA function automatic detection system the most according to claim 1 and 2, it is characterised in that also
Test switch including the current supply circuit break-make controlling described microprocessor.
PCBA function automatic detection system the most according to claim 6, it is characterised in that
Described test switch is mechanical switch or remote switch.
PCBA function automatic detection system the most according to claim 1 and 2, it is characterised in that
Described testing jig is press-down type testing jig.
PCBA function automatic detection system the most according to claim 1 and 2, it is characterised in that
Described microprocessor is STM32F4 series monolithic.
PCBA function automatic detection system the most according to claim 1 and 2, it is characterised in that
Described display screen is thin film transistor liquid crystal display screen.
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