CN105717442A - Device and method for printed circuit board detection based on schematic diagram assertion - Google Patents
Device and method for printed circuit board detection based on schematic diagram assertion Download PDFInfo
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- CN105717442A CN105717442A CN201610208899.5A CN201610208899A CN105717442A CN 105717442 A CN105717442 A CN 105717442A CN 201610208899 A CN201610208899 A CN 201610208899A CN 105717442 A CN105717442 A CN 105717442A
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- circuit board
- test
- finger
- schematic diagram
- printed circuit
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
Abstract
The invention discloses a device and method for printed circuit board detection based on a schematic diagram assertion. The device comprises a testing device, a control unit and a debugging mainframe, wherein the testing device comprises a finger test unit and an image colleting unit. The finger test unit comprises a finger test element and an electromechanical moving module. The finger test element is driven by the electromechanical moving module to move, so that a contact tip of the finger test element is in continuous contact with a designated location of a circuit board entity. The control unit is used for controlling the motion of the contact tip through the electromechanical moving module according to the distance between the contact tip and a test point on the circuit board entity. The debugging mainframe is used for sending to the control unit a control command of moving the contact tip and is used for reading data results, making a comparison between the data results and the assertion and displaying the results. The method is based on the detection device. The detection device has the advantages of being simple in structure, simple and convenient to operate and high in automation degree.
Description
Technical field
Present invention relates generally to the detection field of printed circuit board, refer in particular to a kind of printed circuit board checking device asserted based on schematic diagram and detection method.
Background technology
Pcb board (PrintedCircuitBoard, printed circuit board (PCB)) it is one of the vitals of electronics industry, it can provide the mechanical support that the various electronic devices and components such as integrated circuit are fixed, assembled, realize the wiring between the various electronic devices and components such as integrated circuit and electrical connection or electric insulation, required electrical characteristic (such as characteristic impedance etc.) is provided, and provides welding resistance figure for automatic tin soldering and provide identify character and figure etc. for element plug-in mounting, inspection, maintenance.
Now almost every kind of electronic equipment, such as accutron, computer, computer, communication electronic device and military issue weapons system etc., as long as it has the electronic devices and components such as integrated circuit, is required for the electric interconnection using pcb board to realize between electronic devices and components.In relatively large electronic product research process, most basic success factor is the design of this product P CB plate, documentation and manufacture.The design of pcb board and workmanship can directly influence quality and the cost of whole product, even result in the success or failure of commercial competition.It is thus desirable to carry out pcb board developing debugging, production test with detection and the design and the workmanship that improve pcb board.
The tester of test circuit board can be generally divided into two classes, and a class is with finger-like tester, another kind of with parallel tester.Finger-like tester is to test without element or the tester having element circuitry plate, and it utilizes two or more finger-like testing elements orders or scans each contact point continuously.Parallel tester is made by all or at least majority circuit board test point testers of the adapter circuit board of contact measured examination simultaneously.The follow-on test utilizing finger-like tester is slower than the concurrent testing utilizing parallel tester.
Finger-like testing element is normally held on the slide block that can move along cross bar, and cross bar can by rail guidance and can move along guide rail.Therefore slide block can be positioned on any desired point of the usually hot-wire array of rectangle.Similarly there are the tester with fixed transverse rod, this cross bar is provided with removable slide block.Finger-like testing element is disposed on these slide blocks, and this finger-like testing element has certain length and its one end is rotatably fixed (pivot joint) in slide block.Rotary motion by finger-like testing element, it is possible to scanning is perpendicular to some region of cross bar.Utilize the finger-like tester of both types, it is possible to contact and test the circuit board test point of circuit board to be tested.
Practitioner is had to propose the technical scheme much relating to finger-like tester.Such as: patent EP0468153A1 discloses a kind of finger-like tester, patent EP0853242A1 discloses the method utilizing finger-like tester test circuit board, patent US5113133 discloses the test probe of the circuit board test point of Rapid contact circuit board to be tested, patent CN102967791B discloses the inspection method of a kind of contact judging digital circuit board test pen, and patent WO9211541 discloses the imaging system for circuit board testing device.
Design the schematic diagram of printed circuit board in a computer with eda tool, schematic diagram represents the logical relation that electronic devices and components connect, so also known as logic chart.According to principle diagram design PCB figure, then process printed circuit board according to PCB pattern, and welding equipment components and parts obtain circuit board entity.Debugging and test process to circuit board entity, is namely obtain the process that running status and the principle diagram design of circuit board each signal of entity are expected to confirm one by one.
Debugging and test process that current typical hardware engineer adopts be:
1) on circuit theory diagrams, look for the logical signal needing test；
2) manually in PCB figure, the PCB contact position that this signal is corresponding is found；
3) manually contact physical location is physically found at circuit board；
4) manual operations test equipment probe and contact；
5) on test equipment, test result is observed；
6) whether artificial and expected design comparison meets.
But, according to the flow process of above-mentioned traditional method, even if having employed above automatic test approach, can not automatically check and comparison result.Remain a need for carrying out repeatedly manual switching between schematic diagram, PCB and circuit board entity, reduce debugging efficiency, add error probability, extend the development debugging time.
Summary of the invention
The technical problem to be solved in the present invention is that for the technical problem that prior art exists, and the present invention provides the printed circuit board checking device asserted based on schematic diagram and detection method that a kind of simple in construction, easy and simple to handle, automaticity are high.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
A kind of printed circuit board checking device asserted based on schematic diagram, comprising:
Test equipment, including finger-like test cell and image acquisition units；Described finger-like test cell includes finger-like testing element and dynamo-electric moving assembly, drives finger-like testing element to move by dynamo-electric moving assembly, so that the contact tip of finger-like testing element contacts the appointment position of circuit board entity continuously；
Control unit, for the distance according to contact tip circuit board physically test point apart, controls the motion of contact tip by dynamo-electric moving assembly；
Debugging main frame, is used for sending, to control unit, the control command that moving contact is most advanced and sophisticated, and be used for reading data result and with assert comparison, show result.
Further improvement as detecting device of the present invention: described dynamo-electric moving assembly is used for making finger-like testing element move along the surface of circuit board entity, and moves up and down the height and position adjusting finger-like testing element.
Further improvement as detecting device of the present invention: also include installation unit, for being fixed in a circuit board installation region by circuit board entity.
Further improvement as detecting device of the present invention: described control unit is connected with debugging main frame by the first control line, described image acquisition units is connected with debugging main frame by image transmitting line.
Further improvement as detecting device of the present invention: described image acquisition units includes test probe and connecting line, by test probe collecting test signal and test result data is transferred to debugging main frame.
Further improvement as detecting device of the present invention: described test equipment is connected with debugging main frame by order wire.
The present invention further provides a kind of method of testing based on printed circuit board checking device described in above-mentioned any one, the steps include:
S1: initialize system；
S2: user opens schematic diagram and the PCB figure of circuit board in debugging main frame；
S3: user chooses either signal at schematic diagram；
S4: user selects " asserting " in the menu option of schematic diagram editing machine, arranges the amplitude attribute of signal in the dialog box ejected；Then, close box；Or arrange and assert that attribute is empty, be and be not added with asserting；
S5: the main control software program run in debugging main frame searches for the sensing point that signal is corresponding in PCB diagram data；
S6: if not searching available sensing point, i.e. n=0, then eject prompting message, forward step S3 to, reselect the signal to test；
S7: if there being multiple available sensing point, pop-up dialogue box is selected by user；
S8: read the centre coordinate position of selected sensing point from PCB file；
S9: calculate the coordinate position of sensing point；
S10: drive dynamo-electric moving assembly to move finger-like testing element, make finger-like testing element contact with sensing point；
S11: start test equipment, read test data from test equipment；
S12: process test data result；Assert if preset, then with the comparison of asserting pre-set.
S13: call frame display test data and comparison result.
Compared with prior art, it is an advantage of the current invention that:
1, the present invention introduces " asserting " method of testing that software program field tests uses in circuit debugging field, in the process of design principle figure, namely arranges " signal is asserted " by plug-in unit mode in schematic diagram, namely specifies the zone of reasonableness of signal.Then in the process to debugging circuit board entity, popped one's head in by mechanical mobile device mobile test equipment, it is achieved the automatic measurement to test signal, assert with the signal pre-set and automatically compare, it is achieved the purpose of debugging automatically.The present invention improves debugging efficiency, reduces error probability, shortens the development debugging time.
2, the present invention is connected with the test probe of general purpose test equipment by finger-like test original paper, it is achieved the universal test system of low cost, and asserts mode by circuit, it is achieved the automatic comparison of test result.
3, the present invention tests automatically by realizing circuit board in the schematic diagram edit tool of debugging main frame complete control and result export, and from manual multi-platform operation, circuit board testing is embodied as single automatization's integrated test system.
Accompanying drawing explanation
Fig. 1 is the topological structure schematic diagram of detecting device of the present invention.
Fig. 2 is the present invention to be obtained data test signal waveform and carrying out and asserts the interface schematic diagram of detection when concrete application.
Fig. 3 is detection method schematic flow sheet in concrete application example.
Marginal data:
1, circuit board installation region；2, circuit board entity；3, test probe and connecting line；4, test equipment；5, order wire；6, the first control line；7, debugging main frame；8, control unit；9, eda tool.
Detailed description of the invention
Below with reference to Figure of description and specific embodiment, the present invention is described in further details.
In software program field tests, " asserting " is a kind of conventional program testing method.For ensureing the accuracy of algorithm, annotation is often included in a program by chip designer, in order to when scheduling or during innovatory algorithm, chip designer can more clearly understand the running of algorithm, without simulating or composition algorithm can not.Programming personnel and chip designer in order to another kind of technology that the accuracy ensureing algorithm uses be insertion program itself interior assert function (assertionfunction).Although some programmings and hardware description language (HDL) will assert that function includes in their storehouse, but still there is other the more special program of asserting can run as a part for simulation program (computer, synthesizer etc.), in order to simpler and clearer and more easily perform to assert in programming language.More specifically, SystemVerilogAssertion (SVA), PropertySpecificationLanguage (PSL), OpenVeraAssertion (OVA) can serve as a part of HDL, more fully asserts function to provide.
As depicted in figs. 1 and 2, the printed circuit board checking device asserted based on schematic diagram of the present invention, including:
Test equipment 4, including finger-like test cell and image acquisition units；Finger-like test cell includes finger-like testing element and dynamo-electric moving assembly, utilizes the contact tip of finger-like testing element to contact the appointment position of circuit board entity 2 continuously.Dynamo-electric moving assembly is used for making finger-like testing element move along the surface of circuit board entity 2, and can move up and down the height and position adjusting finger-like testing element and make contact tip arrive circuit board entity 2；Namely finger-like testing element can be made to do the motion of two dimensions, and the position to adjust contact tip in real time makes contact tip contact with circuit board entity 2.Image acquisition units for gathering the image near the contact tip of finger-like testing element by the method for light image；
Control unit 8, for according to contact tip distance of test point on circuit board entity 2, controlling the motion of contact tip by dynamo-electric moving assembly；
Debugging main frame 7, is used for running schematic design tools software, including schematic diagram and PCB diagram data；Described debugging main frame 7 sends, to control unit 8, the control command that moving contact is most advanced and sophisticated, and be used for reading data result and with assert comparison；Can be also used for video data result waveform further, comparison result is asserted in the circuit board image of displayed image unit collection, display.
In concrete application example, preferably, further comprising installation unit, it is for by circuit board entity 2(circuit board to be tested) it is fixed in a circuit board installation region 1.
In concrete application example, control unit 8 can be passed through the first control line 6 and be connected with debugging main frame 7, and image acquisition units is connected with debugging main frame 7 by image transmitting line；It is provided with eda tool 9 in debugging main frame 7.
In concrete application example, preferably, image acquisition units includes test probe and connecting line 3, by test probe collecting test signal, and test result data can be transferred to miscellaneous equipment, such as debugging main frame 7, test equipment 4 is connected with debugging main frame 7 by order wire 5.The test probe of image acquisition units is connected with finger-like element to be tested, it is achieved test signal transmission.
In concrete application example, dynamo-electric moving assembly can select concrete mechanism according to actual needs, such as screw mandrel drive mechanism, fuel cylinder driving mechanism, motor-driven mechanism etc., as long as disclosure satisfy that translation and the motion of two dimensions of lifting, just differing at this and repeating again and again.
As shown in Figures 2 and 3, the present invention further provides a kind of method of testing based on above-mentioned printed circuit board checking device, in concrete application example, its detailed process is:
S1: initialize system；
S2: user opens schematic diagram and the PCB figure of circuit board in debugging main frame 7；
S3: user chooses a certain signal at schematic diagram, for instance Net1；
S4: user selects " asserting " in the menu option of schematic diagram editing machine, arranges the attribute such as amplitude of signal in the dialog box ejected；Then, close box.Can also arrange and assert that attribute is empty, be and be not added with asserting.
S5: the main control software program run in debugging main frame 7 searches for sensing point Test corresponding for Net1 in PCB diagram datai, 0≤i≤n；
S6: if not searching available sensing point, i.e. n=0, then eject prompting message, forward step S3 to, reselect the signal to test.
S7: if there being multiple available sensing point, pop-up dialogue box is by the selected Test of userp。
S8: main control software reads Test from PCB filepCentre coordinate position.
S9: main control software calculates TestpCoordinate position in circuit board installation region 1.
S10: main control software passes through the first control line 6, drives dynamo-electric moving assembly to move finger-like testing element, makes finger-like testing element contact with sensing point.
S11: main control software starts test equipment 4, by order wire 5 read test data from test equipment 4.
S12: master control processes test data result；Assert if preset, then with the comparison of asserting pre-set.
S13: main control software calls frame display test data and comparison result.
Below being only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment, and all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that, for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, should be regarded as protection scope of the present invention.
Claims (7)
1. the printed circuit board checking device asserted based on schematic diagram, it is characterised in that including:
Test equipment (4), including finger-like test cell and image acquisition units；Described finger-like test cell includes finger-like testing element and dynamo-electric moving assembly, drives finger-like testing element to move by dynamo-electric moving assembly, so that the contact tip of finger-like testing element contacts the appointment position of circuit board entity (2) continuously；
Control unit (8), for the distance according to the contact tip upper test point of circuit board entity (2) apart, controls the motion of contact tip by dynamo-electric moving assembly；
Debugging main frame (7), is used for sending, to control unit (8), the control command that moving contact is most advanced and sophisticated, and be used for reading data result and with assert comparison, show result.
2. the printed circuit board checking device asserted based on schematic diagram according to claim 1, it is characterized in that, described dynamo-electric moving assembly is used for making finger-like testing element move along the surface of circuit board entity (2), and moves up and down the height and position adjusting finger-like testing element.
3. the printed circuit board checking device asserted based on schematic diagram according to claim 1 and 2, it is characterised in that also include installation unit, for being fixed on circuit board entity (2) in a circuit board installation region (1).
4. the printed circuit board checking device asserted based on schematic diagram according to claim 1 and 2, it is characterized in that, described control unit (8) is connected with debugging main frame (7) by the first control line (6), and described image acquisition units is connected with debugging main frame (7) by image transmitting line.
5. the printed circuit board checking device asserted based on schematic diagram according to claim 4, it is characterized in that, described image acquisition units includes test probe and connecting line (3), by test probe collecting test signal and test result data is transferred to debugging main frame (7).
6. the printed circuit board checking device asserted based on schematic diagram according to claim 4, it is characterised in that described test equipment (4) is connected with debugging main frame (7) by order wire (5).
7. the method for testing based on printed circuit board checking device described in any one in the claims 1～6, it is characterised in that step is:
S1: initialize system；
S2: user opens schematic diagram and the PCB figure of circuit board in debugging main frame (7)；
S3: user chooses either signal at schematic diagram；
S4: user selects " asserting " in the menu option of schematic diagram editing machine, arranges the amplitude attribute of signal in the dialog box ejected；Then, close box；Or arrange and assert that attribute is empty, be and be not added with asserting；
S5: the main control software program run in debugging main frame (7) searches for the sensing point that signal is corresponding in PCB diagram data；
S6: if not searching available sensing point, i.e. n=0, then eject prompting message, forward step S3 to, reselect the signal to test；
S7: if there being multiple available sensing point, pop-up dialogue box is selected by user；
S8: read the centre coordinate position of selected sensing point from PCB file；
S9: calculate the coordinate position of sensing point；
S10: drive dynamo-electric moving assembly to move finger-like testing element, make finger-like testing element contact with sensing point；
S11: start test equipment (4), read test data from test equipment (4)；
S12: process test data result；Assert if preset, then with the comparison of asserting pre-set；
S13: call frame display test data and comparison result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208899.5A CN105717442A (en) | 2016-04-06 | 2016-04-06 | Device and method for printed circuit board detection based on schematic diagram assertion |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610208899.5A CN105717442A (en) | 2016-04-06 | 2016-04-06 | Device and method for printed circuit board detection based on schematic diagram assertion |
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| CN105717442A true CN105717442A (en) | 2016-06-29 |
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| CN201610208899.5A Pending CN105717442A (en) | 2016-04-06 | 2016-04-06 | Device and method for printed circuit board detection based on schematic diagram assertion |
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Cited By (1)
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| CN109765479A (en) * | 2019-01-28 | 2019-05-17 | 合肥京东方视讯科技有限公司 | A kind of circuit board Short Item detection device and method |
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| CN109765479B (en) * | 2019-01-28 | 2021-10-01 | 合肥京东方视讯科技有限公司 | Device and method for detecting missing parts of circuit board |
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Effective date of registration: 20180118 Address after: 518000 Guangdong city of Shenzhen province Futian District Meilin Meilin streets Meihua Road, building 228 Meiqin Applicant after: Shenzhen Sailun Beidou technology limited liability company Address before: 410003 Hunan province Changsha Kaifu District wujialing Street 31 Road No. 203 building 1406 room C3 million Xu Yuan Applicant before: CHANGSHA SANFAN INFORMATION TECHNOLOGY CO., LTD. |
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Application publication date: 20160629 |