CN104155593A - Vehicle-mounted PCBA on-line testing system and testing method - Google Patents
Vehicle-mounted PCBA on-line testing system and testing method Download PDFInfo
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Abstract
The invention discloses a vehicle-mounted electric pedal PCBA on-line testing system and a testing method. The testing system comprises a testing cabinet, a testing fixture, an electric control unit, a PCBA executing load unit, a PC system and testing system software. The testing fixture, the electric control unit and the PC system are fixed into the testing cabinet. The testing system sends out controlling and testing information through the testing system software, the PCBA executing load unit is driven by a to-be-tested PCBA plate to move, a current Hall sensor collects real-time data of a direct current motor in the moving process, the data information of tested points of the to-be-tested PCBA plate in the working process is electrically transmitted through a testing probe, the collected real-time data are transmitted to a PC system through a data collection control card and are processed by the testing system software, and the testing function of the to-be-tested PCBA plate is achieved. The vehicle-mounted PCBA on-line testing system and the testing method have the advantages that the stability of the system is good, the precision is high, the testing speed is high, operation is convenient and data can be stored, and the vehicle-mounted PCBA on-line testing system and the testing method can be applied to the technical field of PCBA testing.
Description
Technical field
The present invention relates to electronic product field tests, be specifically related to a kind of for vehicle mounted electric pedal PCBA Online Transaction Processing and method of testing.
Background technology
Printed-wiring board (PWB) (Printed circuit board, PCB) is the supporter of electronic component, and except fixing various electronic components, its major function is to provide the mutual electrical connection of each electronic component on plate.Finished product wiring board (Printed circuit board Assemble, PCBA) is the finished product after the upper part of SMT and the whole process of DIP plug-in unit on the basis of printed-wiring board (PWB) (PCB), is called for short PCBA.Along with the development of electronic circuit integrated technology, the function of each electronic product and inner structure thereof are further powerful and complicated, this on-the-spot real-time testing to electronic product has proposed higher technical requirement, and traditional detecting instrument and the test speed of method and accuracy cannot meet existing requirement.Particularly for requiring high reliability, high-stability car vehicle electronics product, its PCBA test is checked on and is seemed particularly important as the quality of product, therefore for electronic product test macro and the particularly important necessity of method of automobile aspect.
The conventional method of testing for PCBA mainly contains following five kinds at present:
1. artificial vision's test
Artificial vision's test is to confirm the component mounter on PCB by people's vision observation and comparison, and this technology is one of the most widely used on-line testing method.But along with the increase of output and dwindling of circuit board and element, this method is more and more inapplicable.Low cost, not need test fixture and electrical system be its major advantage; Meanwhile, very high standing cost, Data Collection difficulty, be also the major defect of this method without electric test and visual limitation.
2. automatic visual inspection (Automated Optical Inspection, AOI)
This method of testing is tested also referred to as automatic vision, conventionally before and after refluxing, uses, and is the method for newer confirmation manufacturing defect, and the polarity to components and parts, the inspection effect whether components and parts exist are relatively good.It is a kind of non-electric, without the on-line testing technology of fixture.Its major advantage is to be easy to follow that diagnosis, test procedure are easily developed and without test fixture; Major defect is poor to short circuit identification, and is not electric test.
3. functional test (Functional Test)
Functional test is automatic test philosophy the earliest, it is the basic test method of specific PCBA or discrete cell, functional test is used for checking whether PCB function module can complete set functional requirement, and element (as potentiometer, controllable impedance or electric capacity) that simultaneously also can be adjustable to some carries out parameter value adjustment.While carrying out functional test, need to use a series of driving sources, set up the operation initial conditions of module, to check the functional characteristic of module and find out fault.Its advantage is the actual mass that can reflect intuitively PCBA function module; Its major defect is Data Collection trouble, and PCBA to be measured needs signal driving source equipment, can not locate the trouble spot of PCBA, test system building trouble, accurately on-line testing PCBA function.
4. flying probe tester (Flying-Probe Tester)
Flying probe tester, also referred to as probe tester, is also a kind of conventional method of testing.Due to the progress aspect mechanical precision, speed and reliability, it has been subjected to industry accreditation in the past few years.In addition, manufacture needed have quick conversion, requirement without the test macro of fixture ability for prototype manufacture, low yield now, make flying probe become optimal selection.The major advantage of flying probe tester is, it is the instrument that arrives the most fast market, automatically generates test, without fixture cost, and good diagnosis and be easy to programming.Its shortcoming is that manufacturing cost is higher, and the relative test duration is long, infringement PCBA pad face.
5. manufacturing defect analyser (Manufacturing Defect Analyzer, MDA)
MDA a kind ofly only diagnoses the good tool of manufacturing defect for high yield/low hybird environment.The major advantage of this method of testing is that front current cost is lower, and high output, easily follows diagnosis and quick and complete short circuit and open test etc.; Major defect is to carry out functional test, conventionally there is no Test coverage instruction, must use fixture, and testing cost is high.
In sum, in PCBA test industry, according to different test macros and the relative merits of method, be badly in need of being a kind ofly suitable for Small and Medium Enterprises in China, method of testing science, testing quick, cheap, easy to use and reliable PCBA test macro, thereby research and development and the production of promotion and guide product, to meet the need of market, it is the problem that needs solve.
Summary of the invention
Object of the present invention is exactly in order to solve above-mentioned the deficiencies in the prior art part, provide a kind of for automotive electronics production industry, there is system stability good, measuring accuracy is high, test fast, have excellent operation interface, easy to use, can realize memory storage function, lower-cost PCBA Online Transaction Processing and method of testing thereof.
The present invention is achieved through the following technical solutions:
The vehicle-mounted PCBA Online Transaction Processing of described one, comprise test cabinet, measurement jig, electric control unit, PCBA carries out load unit, data acquisition control card and computing machine interconnect, host computer testing software composition, described measurement jig is fixed on test cabinet, described measurement jig is connected with computing machine by data acquisition card interface, described electric control unit is connected in computing machine by connection, described electric control unit is connected with measurement jig by relay array, described PCBA carries out load unit and is connected with measurement jig, described upper computer software is for electric unit control and PCBA test.
In order to realize better the present invention, in described test cabinet, place fixing test tool, electric control unit, computing machine, for testing PCBA.Described measurement jig comprises needle-bar body, test probe, clamp device, external analog circuit, supports stand, it is characterized in that, on needle-bar body, test probe is installed, test probe top arranges clamp device, in described needle-bar body, be fixed with PCBA external analog circuitry, PCBA external analog circuitry is by test point signal wire and connection terminal, described connection terminal is connected with data collecting card, and data collecting card is fixed in computing machine.Described clamp device comprises that operating grip, crank connecting link, vertical guide stem, pressure head screw, compression collets interconnect composition successively, it is characterized in that vertical guide stem is connected in compression collets by pressure head screw, compress collets below and place needle-bar body, needle-bar body is fixed on above support stand.Described electric control unit comprises PLC control system, current collection circuit, large electric current adjustable DC power supply, relay switch array, main frame.It is characterized in that main frame is connected with PLC controller by the communications cable, PLC control system is made up of PLC controller and relay switch array, large electric current adjustable DC power supply connects needle-bar body build-in test probe, described current collection circuit is made up of 2 large current Hall sensors and DC voltage-stabilizing power supply, it is characterized in that DC voltage-stabilizing power supply is connected with the supply terminals of large current Hall sensor, large current Hall sensor is connected with capture card signaling interface by its signal output part.Described PCBA carries out load unit and is made up of fixed pedestal support, 4 direct current generators, auto pedal telescopic mechanisms, it is characterized in that 4 direct current generators are fixed on pedal support, direct current generator drives pedal load stretching operation by auto pedal telescopic mechanism.
Enforcement of the present invention provides a kind of vehicle-mounted PCBA Online Transaction Processing, compared with prior art there is following beneficial effect: can instruct on the one hand and research and development and the production of auxiliary PCBA, improve the efficiency of research and development of products, reduce product erroneous judgement, help R&D personnel to the quick location of the technical matters occurring and improve the efficiency of dealing with problems; On the other hand, the test data information of every test point of PCBA test can be assessed the performance of product quality and evaluation execution direct current generator, improves the performance quality of auxiliary products.
Brief description of the drawings
Fig. 1 is that one of the present invention is for vehicle mounted electric pedal PCBA Online Transaction Processing one-piece construction schematic diagram;
Fig. 2 is that one of the present invention is for vehicle mounted electric pedal PCBA Online Transaction Processing composition frame chart;
Fig. 3 is measurement jig structural representation in the present invention;
Fig. 4 is that in the present invention, PCBA carries out load unit structural representation;
Fig. 5 is direct current generator current collection circuit principle schematic in the present invention;
Fig. 6 is method of testing process flow diagram of the present invention.
In figure: test cabinet 1, measurement jig 2, electric control unit 3, PCBA carries out load unit 4, PC system 5, testing system software 6, operating grip 21, crank connecting link 22, vertical links 23, pressure head screw 24, compress collets 25, PCBA plate 26 to be measured, needle-bar body 27, test probe 28, support stand 29, PLC control system 31, current of electric Acquisition Circuit 32, adjustable DC power supply 33, relay switch array 34, 5V D.C. regulated power supply 35, the communications cable 36, electrical control cable 37, current Hall sensor 38, auto pedal load 41, direct current generator 42, telescopic mechanism 43, fixed pedestal support 44, PC main frame 51, data acquisition control card 52, PC display 53, connection terminal 54.
Embodiment
Below in conjunction with accompanying drawing, specific embodiment of the invention is elaborated.
As Figure 1-5, a kind of vehicle-mounted PCBA Online Transaction Processing, test macro comprises test cabinet 1, measurement jig 2, electric control unit 3, PCBA carries out load unit 4, PC system 5, testing system software 6, measurement jig 2 comprises operating grip 21, crank connecting link 22, vertical links 23, pressure head screw 24, compress collets 25, PCBA plate 26 to be measured, needle-bar body 27, test probe 28, support stand 29, it is characterized in that needle-bar body 27 is fixed on above support stand 29, test probe 28 is installed in needle-bar body 27, PCBA plate 26 to be measured is placed in test probe 28 tops, PCBA plate 26 vertical direction to be measured are provided with and compress collets 25, compress collets 25 and are fixedly connected with by pressure head screw 24, and vertical guide stem 23 is connected in and is compressed collets 25 by pressure head screw 24, vertical guide stem 23 tops are by crank connecting link 22 attended operation handles 21, and electric control unit 3 comprises PLC control system 31, current of electric Acquisition Circuit 32, adjustable DC power supply 33, relay switch array 34, 5V D.C. regulated power supply 35, the communications cable 36, electrical control cable 37, current Hall sensor 38, it is characterized in that PLC control system 31 is made up of PLC controller and relay switch array 34, adjustable DC power supply 33 connects needle-bar body 27 build-in test probes 28, electrical control cable 37 1 terminals are connected with test probe 28, electrical control cable 37 another terminals are connected in direct current generator 42, PLC control system 31 is connected with PC system 5 by the communications cable 36, current of electric Acquisition Circuit 32 is made up of 2 current Hall sensors 38 and 5V direct supply 35, it is characterized in that 5V direct supply 35 and current Hall sensor 38 supply terminals H11, H12, H21, H22 is connected, and current Hall sensor 38 is by its signal output part H13, H23 is connected with capture card connection terminal 54, and PCBA carries out load unit 4 and comprises auto pedal load 41, direct current generator 42, telescopic mechanism 43, fixed pedestal support 44, is characterized in that 4 direct current generators 42 are fixed on pedal support 44,1 auto pedal load 41 of 2 described direct current generator 42 parallel drives, and electrical control cable 37 one end are by terminals M1, M2, M3, M4 connects direct current generator 42, and direct current generator 42 drives auto pedal load 41 by telescopic mechanism 43, and PC system 5 comprises PC main frame 51, data acquisition control card 52, PC display 53, connection terminal 54, is characterized in that the inner installation data acquisition and control card 52 of PC main frame 51, and data acquisition control card 52 outsides are connected in connection terminal 54, and testing system software 6 runs on PC system 5.
In the present invention, described measurement jig 2, electric control unit 3, PC system 5 is fixed on test cabinet 1 inside, measurement jig 2 is connected with PC main frame 51 by data collecting card connection terminal 54, electric control unit 3 is connected in PC main frame 51 by connection 36, electric control unit 3 is connected with measurement jig 2 by relay switch array 34, PCBA carries out load unit 4 and is connected with measurement jig 2, this test macro sends control command by described testing system software 6, controlling electric control unit 3 moves PCBA execution load unit 4, gather 4 real-time current data in described direct current generator 42 motion processes by 2 described current Hall sensors 38, electrically transmit the data message of test point in PCBA plate 26 courses of work to be measured by the test probe 28 in described needle-bar body 27, by described data acquisition control card 52, the current data and the test point data message that collect are conveyed into PC system 5, by described testing system software 6, the real time data collecting is processed, realize the test function of surveying PCBA plate 26.
As shown in Figure 6, A-J, for the invention provides vehicle-mounted PCBA on-line testing method, comprises following key step, but the method for testing example of this test macro is not limited to this:
The first step, prepare PCBA plate 26 to be measured, manual unlocking testing system software 6, starts test;
Second step, PCBA plate 26 to be measured is lain in a horizontal plane in above the needle-bar body 27 in measurement jig 2, manual operation operating grip 21 makes to compress collets 25 and clamps PCBA plate 26 to be measured downwards, now upwards each test point on PCBA plate 26 to be measured in electrical contact of test probe 28, for PCBA plate 26 to be measured switches on power;
The 3rd step, in testing system software 6, input the essential information of PCBA plate 26 to be measured, wait to be tested;
The 4th step, wait acknowledge test, and carry out the 4th pacing examination, if essential information input is not exclusively, repeat third step;
The 5th step, manual adjustments adjustable DC power supply 33 are to regulation power values, for PCBA plate 26 to be measured provides input voltage;
" starting test " button in the 6th step, hit testing system software 6, carry out test, now PCBA carries out load unit 4 and carries out the action command that testing system software 6 is sent, and data acquisition control card 52 real-time onlines gather PCBA and carry out the data message in load unit 4 motion processes;
After the 7th step, 4 motions of pending load unit finish, testing system software 6 is processed the data that collect, and shows test judgement and test result;
" test completes " button in the 8th step, hit testing system software 6, preserves these data of testing and correlated results to system;
The 9th step, this test complete, and take off PCBA plate 26 to be measured.
Above-mentioned example, in the present invention, the input of the 3rd step PCBA plate 26 essential informations to be measured comprise: production code member, test No., test-types, the information such as test duration.The preservation test data of the 8th step and correlated results are to system, realize by Access database in this testing system software 6, test record of formation after every block of PCBA plate 26 to be measured completes, be kept in the Access database of testing system software 6, facilitate later data query and report printing output.The invention provides a kind of vehicle-mounted PCBA Online Transaction Processing, the output of data sampling and processing, result demonstration, preservation and form is combined successively, and test operating procedure is simple, result accuracy of judgement, can greatly improve the testing efficiency of vehicle-mounted PCBA, convenient for the production of process.
Claims (6)
1. a vehicle-mounted PCBA Online Transaction Processing, test macro comprises test cabinet (1), measurement jig (2), electric control unit (3), PCBA carries out load unit (4), PC system (5), testing system software (6), described measurement jig (2), electric control unit (3), PC system (5) is fixed on test cabinet (1) inside, measurement jig (2) is connected with PC main frame (51) by data collecting card connection terminal (54), electric control unit (3) is connected in PC main frame (51) by connection (36), electric control unit (3) is connected with measurement jig (2) by relay switch array (34), PCBA carries out load unit (4) and is electrically connected with measurement jig (2), described system is sent and is controlled and test command by testing system software (6), carry out load unit motion by PCBA plate to be measured (26) driving PCB A, gather the real-time current data in 4 direct current generators (42) motion process by 2 current Hall sensors (38), electrically transmit the data of test point in PCBA plate to be measured (26) course of work by test probe (28), by data acquisition control card (52), the real-time Data Transmission collecting is entered to PC system (5), by testing system software (6), the real time data collecting is processed, realize the measuring ability of PCBA plate to be measured (26).
2. vehicle-mounted PCBA Online Transaction Processing according to claim 1, measurement jig (2) comprises operating grip (21), crank connecting link (22), vertical links (23), pressure head screw (24), compress collets (25), PCBA plate to be measured (26), needle-bar body (27), test probe (28), support stand (29), it is characterized in that needle-bar body (27) is fixed on support stand (29) above, test probe (28) is installed in needle-bar body (27), PCBA plate to be measured (26) is placed in test probe (28) top, PCBA plate to be measured (26) vertical direction is provided with and compresses collets (25), compressing collets (25) is fixedly connected with by pressure head screw (24), vertical guide stem (23) is connected in and is compressed collets (25) by pressure head screw (24), vertical guide stem (23) top is by crank connecting link (22) attended operation handle (21).
3. vehicle-mounted PCBA Online Transaction Processing according to claim 1, electric control unit (3) comprises PLC control system (31), current of electric Acquisition Circuit (32), adjustable DC power supply (33), relay switch array (34), 5V D.C. regulated power supply (35), the communications cable (36), electrical control cable (37), current Hall sensor (38), it is characterized in that PLC control system (31) is made up of PLC controller and relay switch array (34), adjustable DC power supply (33) is electrically connected needle-bar body (27) build-in test probe (28), electrical control cable (37) one terminals and test probe (28) are electrically connected, another terminals of electrical control cable (37) are electrically connected at direct current generator (42), PLC control system (31) is connected with PC system (5) by the communications cable (36), current of electric Acquisition Circuit (32) is made up of 2 current Hall sensors (38) and 5V direct supply (35), it is characterized in that 5V direct supply (35) and current Hall sensor (38) supply terminals H11, H12, H21, H22 is electrically connected, current Hall sensor (38) is by its signal output part H13, H23 and capture card connection terminal (54) are electrical connected.
4. vehicle-mounted PCBA Online Transaction Processing according to claim 1, PCBA carries out load unit (4) and comprises auto pedal load (41), direct current generator (42), telescopic mechanism (43), fixed pedestal support (44), it is characterized in that 4 direct current generators (42) are mechanically anchored on pedal support (44), 2 direct current generators (42), 1 auto pedal load of parallel drive (41), electrical control cable (37) one end is by terminals M1, M2, M3, M4 is electrically connected direct current generator (42), direct current generator (42) drives auto pedal load (41) by telescopic mechanism (43).
5. vehicle-mounted PCBA Online Transaction Processing according to claim 1, PC system (5) comprises PC main frame (51), data acquisition control card (52), PC display (53), connection terminal (54), it is characterized in that the inner installation data acquisition and control card of PC main frame (51) (52), data acquisition control card (52) outside is connected in connection terminal (54), and testing system software (6) runs in PC system (5).
6. based on vehicle-mounted PCBA on-line testing method described in claim 1 to 5 any one, it is characterized in that, comprise the following steps:
The first step, prepare PCBA plate to be measured (26), manual unlocking testing system software (6), starts test;
Second step, PCBA plate to be measured (26) is lain in a horizontal plane in to needle-bar body (27) in measurement jig (2) above, manual operation operating grip (21) makes to compress collets (25) and clamps PCBA plate to be measured (26) downwards, now upwards each test point on PCBA plate to be measured in electrical contact (26) of test probe (28), switches on power;
The 3rd step, in testing system software (6) input PCBA plate to be measured (26) essential information, wait to be tested;
The 4th step, wait acknowledge test, and carry out the 4th pacing examination, if essential information input is not exclusively, repeat third step;
The 5th step, manual adjustments adjustable DC power supply (33) are to specifying power values, for PCBA plate to be measured (26) provides input voltage;
" starting test " button in the 6th step, hit testing system software (6), carry out test, now PCBA carries out load unit (4) and carries out the action command that testing system software (6) is sent, and data acquisition control card (52) real-time online gathers PCBA and carries out the data message in load unit (4) motion process;
After the 7th step, pending load unit (4) motion finish, testing system software (6) is processed the data that collect, and shows test judgement and result;
" test completes " button in the 8th step, hit testing system software (6), preserves these data of testing and result to system;
The 9th step, this test complete, and take off PCBA plate to be measured (26).
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Application publication date: 20141119 |