CN101782612A - Automatic test system for surface acoustic wave (SAW) filter - Google Patents
Automatic test system for surface acoustic wave (SAW) filter Download PDFInfo
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- CN101782612A CN101782612A CN200910191616A CN200910191616A CN101782612A CN 101782612 A CN101782612 A CN 101782612A CN 200910191616 A CN200910191616 A CN 200910191616A CN 200910191616 A CN200910191616 A CN 200910191616A CN 101782612 A CN101782612 A CN 101782612A
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Abstract
The invention discloses an automatic test system for a surface acoustic wave (SAW) filter, which comprises an automatic test machine, a network analyzer, a computer for presetting programs and a communication cable, wherein the automatic test machine comprises a machine body, a programmable logic controller (PLC) automatic control module, a liquid crystal display and a slide rail, a vacuum absorption type manipulator controlled by the PLC automatic control module is arranged on the slide rail, a tray platform, a correction station, a test fixture and a waste box are arranged under the slide rail in parallel, the upper end face of the test fixture is provided with a filter test port, an anisotropy conductive film covers the filter test port and is used for being in contact with and conducting the filter to be tested, the side surface of the test fixture is provided with a network analyzer connecting port, and a matching circuit corresponding to the filter to be tested is arranged between the filter test port and the network analyzer connecting port. The invention has the advantages of high automatism, less labor, high test efficiency, low false reject rate, strong functionality and low cost.
Description
Technical field
The present invention relates to automatic test technology, be a kind of system that realizes SAW performance of filter automatically testing parameters the SAW wave filter.
Background technology
The SAW wave filter is as a kind of electronic component commonly used, have and allow the signal of a certain component frequency to pass through smoothly, the signal of other a part of frequency then is subjected to the function of bigger inhibition, is widely used in the fields such as base station, repeater, mobile phone and GPS, electronic countermeasure and radar of TV, satellite communication, optical fiber communication and mobile communication.The SAW filter construction is varied, and its physical dimension also has nothing in common with each other.
The SAW wave filter for guaranteeing qualification rate, need carry out performance test to it after making, existing test macro mainly adopts manual testing's mode.Manual testing's step is: adopt a network analyzer to test, adopt artificial with on the test fixture that wave filter is positioned over network analyzer is connected, test fixture has the match circuit of respective filter, the wave filter interface is connected with the test fixture interface, described network analyzer test clamp test filter performance, obtain the performance of filter parameter and on display screen, show, compare by the performance parameter of artificial reading displayed and qualified parameter again and judge, if do not exceed qualified preset range then judge that this wave filter is qualified, as go beyond the scope, then judge defective.
There is following defective in this existing manual testing's mode:
1, testing efficiency is low, and a skilled tester per hour also can only reach 200, and the degree that the tester reaches skilled operation needs many-sided training and the learning process of a period of time.
2, automaticity is low, owing to need manually carry out picking and placeing of wave filter, clamping, reading, comparison, judgement are so labor strength is big.
3, the test accuracy rate is low, owing to be to adopt manually to compare and judge that so False Rate is higher, the properties of product consistance is bad, particularly after workman's fatigue, this defective is just more outstanding.
4, test data can't record, and causing can't be to the device statistics and analysis that lost efficacy.
5, cost of products height owing to adopt manually-operated, has increased cost of products.
In recent years, the development of machine automatization testing technique successfully developed several SAW wave filter automatic test machines abroad, but there is following shortcoming in external similar automatic test machine rapidly:
1, price height causes the wave filter production cost to improve.
2, not strong to SAW wave filter physical dimension or model adaptability, test different geometrical size wave filter product is brought difficulty.
3, do not have match circuit in the anchor clamps of this class SAW filters to test machine of external import, can not test the performance of finished product under actual user mode.
Summary of the invention
Technical matters to be solved by this invention is: overcome above-mentioned the deficiencies in the prior art, a kind of automaticity height be provided, need manually less, testing efficiency height, accuracy height, to wave filter physical dimension or model adaptability SAW wave filter Auto-Test System by force and cheaply.For solving the problems of the technologies described above, the present invention has adopted following technical scheme:
A kind of SAW wave filter Auto-Test System comprises it is characterized in that the computing machine and the communication cable of an automatic test machine, a network analyzer, a pre-set programs:
An automatic test machine, comprise body, the PLC automatic control module, LCDs, be set up in parallel the pallet platform in body successively, proofread and correct station, test fixture and waste product box, be set in parallel in described pallet platform, proofread and correct station, the slide rail of test fixture and waste product box top, slide rail is provided with the vacuum adsorption type mechanical arm of PLC automatic control module control, wherein, described test fixture upper surface is provided with the filters to test port, side is provided with the network analyzer connectivity port, be provided with between filters to test port and network analyzer connectivity port and wave filter corresponding ports match circuit to be tested, described vacuum adsorption type mechanical arm lower end has vacuum cup;
A network analyzer, this network analyzer access interface is connected with the network analyzer connectivity port of test fixture side by communication cable, output port is connected with computing machine by communication cable, is used for the test filter performance parameter and parameter is reached computing machine;
The computing machine of a pre-set programs, this computing machine is connected with automatic test machine with network analyzer respectively, processing is from network analyzer performance of filter parameter and judge whether to meet the requirements, and simultaneously result is fed back to PLC automatic control module in the automatic test machine by communication cable.
During use, this system realizes following steps by the computer program Automatic Cycle:
The corresponding test fixture of a, selection and wave filter, described test fixture can be changed and reuse, and can select to have the match circuit of respective filter on the anchor clamps, realizes the finished product after the encapsulation is tested in the performance under the actual working state;
The mode that b, described mechanical arm adsorb by vacuum cup, to be positioned over after wave filter in the pallet platform top tray picks up, slide into device along slide rail and proofread and correct station with the calibration testing position, slide into test fixture top along slide rail then, and with wave filter press down make its with test fixture on the test port connection;
C, described network analyzer record the performance of filter parameter, by communication cable parameter are reached computing machine;
D, described computing machine are by default software program, the performance of filter parameter and the parameter preset that receive are compared, judge whether requirement up to specification of performance of filter, simultaneously result is fed back to PLC automatic control module in the automatic test machine by communication cable;
E, as judging performance of filter requirement up to specification, then qualified wave filter is picked up and sends back to original position by PLC automatic control module control vacuum adsorption type mechanical arm; As judge the performance of filter requirement that falls short of specifications, then underproof wave filter is picked up and delivers to the waste product box by the vacuum adsorption type mechanical arm in the computer control automatic test machine.
Optimization as technique scheme, also be provided with the correction station in the described automatic test machine body, proofread and correct station between pallet platform and test fixture, parallel placement with slide rail, proofread and correct the pneumatic piston that station is provided with four same structures, arrange along cruciform, bolted tentacle is arranged on every pneumatic piston, thereby adjust the distance that the length of every tentacle on pneumatic piston determines its displacement by bolt, vacuum pressure machinery formula drives pneumatic piston edge slide rail move toward one another separately, four sides corresponding with wave filter respectively until four tentacles contact fully, thereby have adjusted the position of the wave filter on the mechanical arm.Like this, when mechanical arm will be positioned over by vacuum cup after wave filter in the pallet platform top tray picks up, sliding into device correction station earlier along slide rail arrives and test position corresponding preset position with the calibration device position, slide into test fixture top and test along slide rail then, guarantee when wave filter presses down with test fixture on test port can aim at more accurately and connect.
As further optimization, the upper end of wave filter test port is provided with anisotropic conductive film on the described test fixture.Described anisotropic conductive film is a kind of macromolecule conductive film of the prior art, after hot pressing, has electric conductivity, has insulativity in the face direction at film thickness direction.When test, can strengthen the contact performance between wave filter and the test fixture like this, make that test is more accurate.Test fixture after this optimize to improve, the applicant has applied for separately that patent protects it.In addition, the automatic test machine that native system adopted, the applicant has applied for individually that also patent protects it.
As another optimization, can select to have the match circuit of respective filter on the described test fixture, realized test to the finished product performance under actual working state after the encapsulation.Described test fixture can be changed and reuse, and can change correct test fixture according to wave filter model or size Selection.
On the whole, native system mainly by network analyzer, automatic test machine, computing machine and the acquisition controlling software, the PLC that write control automatic molding piece, test fixture and some communications, test cable is formed.Wherein network analyzer and computing machine can adopt the equipment in the existing technology, automatic test machine can adopt disclosed structural design in the technical scheme, wherein the test fixture in the automatic test machine can be provided with different test port structures and filter match circuit by the wave filter according to different model on the basis of disclosed structure, and automatic test machine is finished the extracting to wave filter, mobile and placement under the automatic control of PLC automatic control module; Network analyzer is finished parameter testing and analysis to wave filter by test cable and test fixture; The data acquisition control software of computing machine can carry out initialization and necessary control to instrument by Agilent company GPIB to USB cable, and from the network analysis instrument, read the parameters of filters to test and be analyzed judgement, and analysis and judgement is fed back to automatic test machine finish putting back to pallet or putting of wave filter after the test to the waste product box; Wherein between computing machine and the automatic test machine by two-way communication cable inlet wire synchronously and information interaction.
Ratio the invention has the advantages that in existing measuring technology:
1, testing efficiency height, the artificial pallet that only needs to put wave filter well is positioned on the pallet platform, and other job steps are controlled automatically by system and are finished, and test speed is faster, can reach 1000 test rates hourly
2, because native system needs artificial place seldom, so have the automaticity height, the advantage that labor strength is low.
3, owing to being that the employing computing machine compares and judging that so False Rate is low, the properties of product high conformity can not cause erroneous judgement because of the workman is tired.
4, adopt computing machine recorded and stored test data easily,, instruct design improvement the device statistics and analysis that lost efficacy;
5, price is low, and the cost of native system has only about 1/20th of external like product;
6, SAW wave filter physical dimension or model adaptability are strong, and this test macro can be realized the wave filter of different geometrical size or model is tested by changing different test fixtures;
7, can test the serviceability of finished product under practical state after the encapsulation, native system has the relevant matches circuit of wave filter in test fixture, realized the performance in the wave filter real work is tested.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing and instantiation.
Fig. 1 is a SAW wave filter Auto-Test System structural representation.
Fig. 2 faces structural representation for automatic test machine.
Fig. 3 is test fixture plan structure figure.
Fig. 4 is for proofreading and correct station plan structure figure.
1. automatic test machines among the figure, 2. communication cable, 3. network analyzer, 4. computing machine, 5. LCDs, 6. slide rail, 7. pallet platform, 8. vacuum adsorption type mechanical arm, 9. correction station, 10. test fixture, 11. waste product boxes, 12.PLC automatic control module, 13. network analyzer connectivity ports, 14. port match circuit, 15. the filters to test port, 16. anisotropic conductive film, 17. guide rails, 18. pneumatic piston, 19. bolts, 20. tentacles.
Embodiment
A kind of SAW wave filter Auto-Test System shown in Figure 1, this system are passed through to be made up of the computing machine 4 of an automatic test machine 1 (shown in Figure 2), a network analyzer 3 and a pre-set programs of communication cable 2 connections.
In Fig. 2, described automatic test machine 1, comprise LCDs 5, slide rail 6, PLC automatic control module 12, be arranged on the slide rail 6 slidably and be subjected to the vacuum adsorption type mechanical arm 8 of PLC automatic control module 12 controls, be arranged on below the slide rail 6 and parallel with it pallet platform 7, test fixture 10 (shown in Figure 3), the waste product box 11 proofreading and correct station 9 (shown in Figure 4), be connected with network analyzer 3 by communication cable 2.
In Fig. 3, the structure of described test fixture 10 is: the test fixture shell, be arranged at upper surface of outer cover filters to test port one 5, be arranged at the housing side network analyzer connectivity port 13, be arranged on port match circuit 14 between filters to test port one 5 and the network analyzer connectivity port 13, cover the anisotropic conductive film 16 on the described filters to test port one 5; Described anisotropic conductive film 16 has electric conductivity at film thickness direction, has insulativity in the face direction, can strengthen the contact performance between wave filter and the test fixture, makes that the test effect is more accurate.
Proofread and correct station 9 described in Fig. 4, its structure comprises proofreaies and correct the station pedestal, be arranged on the pneumatic piston 18 of four same structures that on guide rail 17, move above the pedestal, arrange along cruciform, the tentacle 20 that has bolt 19 to connect on every pneumatic piston 18, thereby adjust the distance that the length of every tentacle on pneumatic piston 18 determines its displacement by bolt 19, vacuum pressure machinery formula drives pneumatic piston 18 edges slide rail move toward one another separately, four sides corresponding with wave filter respectively until four tentacles 20 contact fully, thereby have realized adjusting the function of the position of the wave filter on the mechanical arm 8.
This system realizes following steps by computer program control Automatic Cycle:
Vacuum adsorption type mechanical arm 8 adopts the mode of vacuum suction in a, the described automatic test machine 1 by preceding terminal sucker, to be positioned over after wave filter in pallet platform 7 top tray picks up, slide into device along slide rail 6 and proofread and correct station 9 with the calibration testing position, slide into test fixture 10 tops along slide rail 6 then, wave filter is pressed down the filters to test port one 5 that makes on itself and the test fixture 10 connect;
B, described network analyzer 3 record the performance of filter parameter, by communication cable 2 parameter are reached computing machine 4;
C, described computing machine 4 are by default software program, the performance of filter parameter and the parameter preset that receive are compared, judge whether requirement up to specification of performance of filter, by communication cable 2 result is fed back to PLC automatic control module 12 in the automatic test machine 1 then;
If d computing machine 4 is judged performance of filter requirement up to specification, then PLC automatic control module 12 control vacuum adsorption type mechanical arms 8 pick up and send back to device pallet platform 7 with qualified wave filter, if computing machine 4 is judged the performance of filters requirement that falls short of specifications, then PLC automatic control module 12 control vacuum adsorption type mechanical arms 8 pick up and deliver to waste product box 11 with underproof wave filter.
Specifically, when native system is implemented, adopted the complete test macro of a cover that connects automatic test machine 1, network analyzer 3,4 three equipment formations of computing machine by communication cable 2.Wherein, described network analyzer 3 and computing machine 4, all directly buy existing equipment and instrument, automatic test machine 1 is applicant's autonomous Design, but, all can not need pay creative work and can make automatic test machine 1 in the native system after as long as those of ordinary skills have known technical scheme of the present invention.When its automatic test machine 1 is implemented, adopt 8 pairs of wave filters of vacuum suction mechanical arm to grasp, move to desired location by the high precision screw mandrel at the control lower edge of high-speed servo motor slide rail 6, can control to reach the purpose of robotization by PLC automatic control module 12 when its process is implemented.Default software in the computing machine in the native system, software program comprises data acquisition control part, data processing section and data communication part, though technical scheme is not announced the content of the concrete source program of software program, but announced the step procedure that software program is controlled in the technical scheme, these steps all are the common steps in this area, such as control manipulator behavior, data acquisition, data processing and data communication or the like.So those of ordinary skills only need know the step in the native system technical scheme, realize step in the native system thereby can not need compile out relevant software programs through creative work.Specifically, during enforcement, data acquisition control software is based on the NI-LabVIEW platform development, designs and writes.A whole set of software the is integrated collection of data, the post analysis of data, the record of data, the judgement of test result, and to multinomial functions such as the communication of equipment, controls.The program interface close friend, simple to operate, speed is fast, stable and reliable operation, precision height.The testing tool and the equipment of the compatible different manufacturers of energy.Have good extendability, can adapt to the needs of development in the future.The machinery Control Software, Siemens PLC C automatic control module 12 has been adopted in the control that is all kinds of mechanical actions of automatic test machine, its program efficiency height, control rate is fast, precision is high, stable and reliable operation, and can by communication cable 2 finish and computer software between synchronously and information communication.
Claims (4)
1. SAW wave filter Auto-Test System comprises it is characterized in that the computing machine and the communication cable of an automatic test machine, a network analyzer, a pre-set programs:
Described automatic test machine, comprise body, the PLC automatic control module, LCDs, be set up in parallel the pallet platform in body successively, proofread and correct station, test fixture and waste product box, be set in parallel in described pallet platform, proofread and correct station, the slide rail of test fixture and waste product box top, slide rail is provided with the vacuum adsorption type mechanical arm of PLC automatic control module control, wherein, described test fixture upper surface is provided with the filters to test port, side is provided with the network analyzer connectivity port, be provided with between filters to test port and network analyzer connectivity port and wave filter corresponding ports match circuit to be tested, described vacuum adsorption type mechanical arm lower end has vacuum cup;
Described network analyzer, this network analyzer access interface is connected with the network analyzer connectivity port of test fixture side by communication cable, output port is connected with computing machine by communication cable, is used for the test filter performance parameter and parameter is reached computing machine;
The computing machine of described pre-set programs, this computing machine is connected with automatic test machine with network analyzer respectively, processing is from network analyzer performance of filter parameter and judge whether to meet the requirements, and simultaneously result is fed back to PLC automatic control module in the automatic test machine by communication cable.
2. SAW wave filter Auto-Test System as claimed in claim 1, it is characterized in that, be provided with the corresponding match circuit of wave filter between described test fixture median filter test port and the network analyzer connectivity port, described test fixture can dismounting and repeated use, for adapting to the different model and the size of institute's survey wave filter, can change corresponding test fixture.
3. SAW wave filter automatic checkout system as claimed in claim 1, it is characterized in that, described correction station is between body inner pallet platform and test fixture, proofread and correct the pneumatic piston that have tentacle of station, be adsorbed on the position of the wave filter on the mechanical arm with calibration by four same structures above the driving of vacuum pressure machinery formula.
4. SAW wave filter Auto-Test System as claimed in claim 1, it is characterized in that, be coated with anisotropic conductive film above the wave filter test port on the described test fixture, conducting film is a kind of anisotropy polymeric membrane of high conductivity, after hot pressing, have electric conductivity, have insulativity in the face direction at film thickness direction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910191616 CN101782612B (en) | 2009-11-26 | 2009-11-26 | Automatic test system for surface acoustic wave (SAW) filter |
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| CN 200910191616 CN101782612B (en) | 2009-11-26 | 2009-11-26 | Automatic test system for surface acoustic wave (SAW) filter |
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| CN106546416A (en) * | 2016-12-01 | 2017-03-29 | 何钊荣 | A kind of optical communication Filter automation system for testing |
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