CN204347173U - High speed on off test system - Google Patents
High speed on off test system Download PDFInfo
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- CN204347173U CN204347173U CN201420820416.3U CN201420820416U CN204347173U CN 204347173 U CN204347173 U CN 204347173U CN 201420820416 U CN201420820416 U CN 201420820416U CN 204347173 U CN204347173 U CN 204347173U
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Abstract
The utility model relates to a kind of high speed on off test system.Comprise test casing, adapter, host computer and output device; Test casing input end is connected with equipment under test by adapter; Host computer input end is connected with test casing output terminal, and host computer output terminal is connected with output device; Host computer comprises test preparatory unit and test cell; Test casing comprises motherboard and carries out the switch matrix plate group that connects and resistance test unit by motherboard; Test preparatory unit is connected with resistance test unit by 16 tunnel high-speed AD acquisition cards.The utility model provides the high speed on off test system that a kind of test speed is high, resistance measuring accuracy is high, easy to operate.
Description
Technical field
The utility model belongs to field of automatic testing, relates to a kind of test macro, is specifically related to a kind of high speed on off test system.
Background technology
Go deep into refinement and the research and development demand in order to meet some big-and-middle-sized equipment along with technician's development work, increasing technician needs the annexation knowing device interior each point.Manual testing's annexation can meet the needs of count few and some mini-plants, and for the equipment that number of test points is more, manually realizing the traversal completely of tie point, is almost the thing that impossible complete, must by the testing apparatus of robotization.The artificial point-to-point mode butted line relation of current employing is tested, and is a very loaded down with trivial details job, not only takes time and effort, and the phenomenons such as survey, test leakage by mistake easily appear in manual testing, have more increased the weight of the work load of tester.More existing on off test instrument also exist that test speed is slow, measuring accuracy is low, use is inconvenient, the more high problems of price, can not meet current actual demand.
Utility model content
In order to solve in background technology existing technical matters, the utility model proposes a kind of high speed on off test system, by this system can at a high speed, the annexation of checkout equipment accurately.
The technical solution of the utility model is: a kind of high speed on off test system, comprises test casing, adapter, host computer and output device; Above-mentioned test casing input end is connected with equipment under test by adapter; Above-mentioned host computer input end is connected with test casing output terminal, and host computer output terminal is connected with output device; Above-mentioned host computer comprises test preparatory unit and test cell; Above-mentioned test casing comprises motherboard and carries out the switch matrix plate group that connects and resistance test unit by motherboard; Above-mentioned test preparatory unit is connected with resistance test unit by 16 tunnel high-speed AD acquisition cards; Its special character is: above-mentioned test cell is connected with switch matrix plate group by RS485 communication unit; Above-mentioned switch matrix plate group comprises at least one switch matrix plate; Above-mentioned switch matrix plate comprises control module MUC, RS485 telecommunication circuit, switch matrix circuit, decoding latch cicuit, interface circuit and power circuit; Above-mentioned control module MUC carries out data interaction by RS485 telecommunication circuit and host computer; Above-mentioned switch matrix circuit is connected with decoding latch cicuit, interface circuit respectively, and is connected with control module MUC by decoding latch cicuit, is connected with equipment under test by interface circuit; Above-mentioned switch matrix plate also comprises gauge tap, and above-mentioned gauge tap is analog switch DG2731DQ;
Above-mentioned output device comprises display and printer;
Above-mentioned tunnel high-speed AD acquisition card-type No. 16 are ADLINK 9114.
The utility model has the advantages that: the speed of the utility model on off test is fast, use high speed on off test system can realize measuring the high speed of measured piece, speed can reach 1000 times/second; The precision that resistance is measured is high, and the resistance measuring error of conducting resistance is less than 5 ‰; Testing software is easy and simple to handle, easy to learn, and test result is made up of pilot lamp and report, whether there is fault very clear, and test report is kept in computer with the form of Microsoft Excel, conveniently checks in the future and proofreads.
1. test speed is high: the utility model substituted for original relay switch with high-speed analog switch compared with applying with tradition.The switch-closed time of relay is about 4 ~ 6 milliseconds, and the closed opening time of high-speed analog switch is about 0.08 millisecond, much smaller than the parameter of relay.Therefore use high-speed analog switch greatly can improve test speed, easily realize the test of 1000 test points per second.
2. resistance measuring accuracy is high: the utility model has 6 resistance measurement gears can select for user, and its maximum range is respectively: 500 Europe, 5K, 50K, 500K, 1.4M and 3.5M.Owing to employing calibration technique in advance, the conducting resistance of connector, wire and switch tested in advance and in test result, deducts this value, making the measuring accuracy of resistance higher than 0.5%.
3. easy to operate: the utility model adopts brand-new human-computer interaction interface, friendly interface is simple to operate; The connection of testing apparatus is furnished with special patch plug, is convenient to the quick connecting test equipment of user.
Accompanying drawing explanation
Fig. 1 high speed on off test system architecture schematic diagram;
Fig. 2 is resistance test unit framework figure
Embodiment
A kind of high speed on off test system, comprises test casing, adapter, host computer and output device; Test casing input end is connected with equipment under test by adapter; Host computer input end is connected with test casing output terminal, and host computer output terminal is connected with output device; Host computer comprises test preparatory unit and test cell; Test casing comprises motherboard and carries out the switch matrix plate group that connects and resistance test unit by motherboard; Test preparatory unit is connected with resistance test unit by 16 tunnel high-speed AD acquisition cards; Test cell is connected with switch matrix plate group by RS485 communication unit; Switch matrix plate group comprises at least one switch matrix plate; Switch matrix plate comprises control module MUC, RS485 telecommunication circuit, switch matrix circuit, decoding latch cicuit, interface circuit and power circuit; Control module MUC carries out data interaction by RS485 telecommunication circuit and host computer; Switch matrix circuit is connected with decoding latch cicuit, interface circuit respectively, and is connected with control module MUC by decoding latch cicuit, is connected with equipment under test by interface circuit; Switch matrix plate also comprises gauge tap, and gauge tap is analog switch DG2731DQ; Output device comprises display and printer; Tunnel high-speed AD acquisition card-type No. 16 are ADLINK 9114.Test casing is realized and the connection of each tested point of measured piece and measurement by adapter; Implement host computer receive the measured value from test casing and process data, and process data biography is shown by output device.Wherein power circuit powers to other several modular circuits, MCU is the control module of switch matrix plate, data interaction is carried out by RS485 telecommunication circuit and host computer, switch matrix circuit is the core circuit of switch matrix plate, it is connected with MCU by circuit that decoding is deposited, and is connected with measured piece by interface circuit.
Switching device during tradition is applied by the present invention changes high-speed analog switch into by relay, and the latter's volume is short for little, closed trip time, greatly can improve test speed; Have modified switch matrix structure, the switch of each node is completely independent, controls simple and can realize the resistance demarcation before measuring and zero, to improve the measuring accuracy of resistance.
Development high speed on off test system, both can realize measuring the high speed of measured point annexation, can draw again point-to-point between conducting resistance, and simple to operate, easy to use.High speed on off test system by test casing, adapter, host computer and output device four part form.Whole test macro completes to be measured the break-make situation of each test point of measured piece and concrete resistance; Wherein adapter is for connecting measured piece and test macro; Test casing realizes connection and the measurement of each tested point of measured piece; Upper computer module receives the measured value from test casing and processes data, draws final test report; Output device shows result.
The emphasis that test macro realizes is to the high speed test of break-make situation between each point of tested cabinet, and when requiring, measure point-to-point between resistance value, so design focal point is test casing.
Test casing is made up of switch matrix plate and AD collection plate two parts, and these two parts are connected by the motherboard in test casing, and wherein switch matrix plate 16 pieces, every block can be accessed by 64 test points, AD collection plates 1 piece.Switch matrix plate is made up of a MCU, switch matrix circuit, power circuit, RS485 telecommunication circuit, decoding latch cicuit and interface circuit; Wherein switch matrix circuit is core circuit, for the high speed realizing break-make relation is measured, switch on switch matrix plate uses analog switch DG2731DQ, its volume is little, and the time that conducting disconnects is short, and current like product uses relay, the switching speed of relay is slow, and volume is large, can not accomplish the one_to_one corresponding of test point and switch, these all limit its test speed.MCU receives the test command from host computer, and the mode gauge tap matrix circuit latched by decoding, realizes function measured point being accessed test macro.AD collection plate is made up of reference power circuit, metering circuit, amplifying circuit, gear replacing circuit and interface circuit.
Upper computer module processes it after receiving the voltage signal of AD collection plate, comprises two parts, and one is preparation module before surveying, and two is test modules.The work that before surveying, preparation module is test module provides necessary condition, and test module realizes the measurement to measured piece.
In addition, more transducer set adapter (connecting test system and pcb board), high speed on off test system can be used for the work of PCB flight, the workload of reverse engineer personnel can be greatly reduced like this, current software systems are slightly made an amendment, can realizing settling at one go to drawing schematic diagram from flight, drastically increasing the work efficiency of deviser, decreasing loaded down with trivial details repetitive operation.The speed of on off test is fast, and use high speed on off test system can realize measuring the high speed of measured piece, speed can reach 1000 times/second; The precision that resistance is measured is high, and the resistance measuring error of conducting resistance is less than 5 ‰;
Testing software is easy and simple to handle, easy to learn, and test result is made up of pilot lamp and report, whether there is fault very clear, and test report is kept in computer with the form of Microsoft Excel, conveniently checks in the future and proofreads.
Adapter makes according to the interface of measured piece, and all pilots to be measured are all connected on test casing by it by measured piece.
16 switch matrix plates of switch matrix module receive the test command from host computer simultaneously, and according to this order control simulation switch motion, current two test points will carrying out testing are introduced AD measuring resistance module.
AD measuring resistance module is measured according to the magnitude of voltage of the principle of electric resistance partial pressure to access 2, and calculates the resistance of access according to magnitude of voltage by host computer; In order to improve the accuracy of measurement result, while voltage between tested 2 is sent into host computer by AD collection plate, also reference voltage has been accessed host computer, and adopt many gears mensuration to measure measured point, the replacing of gear is controlled by upper computer software, and the net result of measurement directly reads at host computer.
RS485 communication module is used for realizing the data between host computer and test casing and command transfer.
ADLINK 9114 capture card completes the collection read work of tested voltage on AD collection plate.
Test preparation module is a part for testing software, mainly completes the preliminary work before test, comprises equipment self-inspection, generation test chart and measuring equipment line and hinders three modules.Equipment self-inspection carries out complete detection to the communication of test macro, the analog switch of switch matrix plate and AD collection plate, guarantee test macro all normal after, can be carried out next step and detect; Generating test chart module is that self study test is prepared, and can generate these test charts traveled through completely of counting according to the number of test points of current measured piece; The resistance value that measuring equipment line resistance module measuring system self is introduced, can improve the precision that conducting resistance is measured like this.
Test module is a part for testing software, comprises self study test, on off test and resistance test.Self study test, according to the test chart generated before, detects a non-fault measured piece, records its break-make relation table, as the foundation measuring same type measured piece annexation; On off test is according to self study result, tests the annexation of same type measured piece, and records the wrong test point pair of annexation; Resistance test tests the concrete resistance of firing point, judges whether its conducting resistance exceeds the scope of its regulation.
Result is exported by display, if test exists fault, then malfunction indicator lamp is lighted, and user is by checking that the test report saving as Microsoft Excel knows the number of test points certificate broken down.
Wherein data handling procedure comprises that test result is averaged, every two test point resistances subtract line resistance process (getting rid of the impact of resistance on wire and connector) and with self study Comparative result (self study process is the break-make relation of a test non-fault equipment, and preserves this data).
Claims (3)
1. a high speed on off test system, comprises test casing, adapter, host computer and output device; Described test casing input end is connected with equipment under test by adapter; Described host computer input end is connected with test casing output terminal, and host computer output terminal is connected with output device; Described host computer comprises test preparatory unit and test cell; Described test casing comprises motherboard and carries out the switch matrix plate group that connects and resistance test unit by motherboard; Described test preparatory unit is connected with resistance test unit by 16 tunnel high-speed AD acquisition cards; It is characterized in that: described test cell is connected with switch matrix plate group by RS485 communication unit; Described switch matrix plate group comprises at least one switch matrix plate; Described switch matrix plate comprises control module MUC, RS485 telecommunication circuit, switch matrix circuit, decoding latch cicuit, interface circuit and power circuit; Described control module MUC carries out data interaction by RS485 telecommunication circuit and host computer; Described switch matrix circuit is connected with decoding latch cicuit, interface circuit respectively, and is connected with control module MUC by decoding latch cicuit, is connected with equipment under test by interface circuit; Described switch matrix plate also comprises gauge tap, and described gauge tap is analog switch DG2731DQ.
2. a kind of high speed on off test system according to claim 1, is characterized in that: described output device comprises display and printer.
3. a kind of high speed on off test system according to claim 2, is characterized in that: described 16 tunnel high-speed AD acquisition card-type number are ADLINK 9114.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420820416.3U CN204347173U (en) | 2014-12-19 | 2014-12-19 | High speed on off test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420820416.3U CN204347173U (en) | 2014-12-19 | 2014-12-19 | High speed on off test system |
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| CN204347173U true CN204347173U (en) | 2015-05-20 |
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| CN201420820416.3U Active CN204347173U (en) | 2014-12-19 | 2014-12-19 | High speed on off test system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107817436A (en) * | 2017-11-21 | 2018-03-20 | 苏州恒境环保科技有限公司 | Universal multichannel PCBA broken circuit detection circuits and its detection method |
| CN109884446A (en) * | 2019-02-19 | 2019-06-14 | 广西思诺电气有限公司 | A kind of electric switch conduction detection instrument and its application method |
-
2014
- 2014-12-19 CN CN201420820416.3U patent/CN204347173U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107817436A (en) * | 2017-11-21 | 2018-03-20 | 苏州恒境环保科技有限公司 | Universal multichannel PCBA broken circuit detection circuits and its detection method |
| CN109884446A (en) * | 2019-02-19 | 2019-06-14 | 广西思诺电气有限公司 | A kind of electric switch conduction detection instrument and its application method |
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