CN202815077U - Multi-channel voltage current tester - Google Patents
Multi-channel voltage current tester Download PDFInfo
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- CN202815077U CN202815077U CN 201220482897 CN201220482897U CN202815077U CN 202815077 U CN202815077 U CN 202815077U CN 201220482897 CN201220482897 CN 201220482897 CN 201220482897 U CN201220482897 U CN 201220482897U CN 202815077 U CN202815077 U CN 202815077U
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Abstract
The utility model relates to a multi-channel voltage current tester. The main technical characteristics are that the multi-channel voltage current tester comprises a PC unit, a PXI interface control unit, an FPGA unit, an ADC conversion unit, a voltage and current measurement unit, a channel selection control unit and an instrument interface unit, wherein the PC unit is connected with the FPGA unit via the PXI interface control unit; the FPGA unit is connected with the ADC conversion unit, the voltage and current measurement unit and the channel selection control unit; the voltage and current measurement unit is connected with the ADC conversion unit and the channel selection control unit; and the channel selection control unit is connected with a tested device via the instrument interface unit. A plurality of voltage and current signals can be quickly measured; the multi-channel voltage current tester has the characteristics of high precision, high sampling frequency, high automation level, easy expansion and the like; and the multi-channel voltage current tester is particularly suitable for the pin on-off test for a chip with a plurality of pins and the pin current leakage test, can simultaneously meet the demand of special clients, greatly reduces the test cost, and can be widely used in the automatic semiconductor test system.
Description
Technical field
The utility model belongs to the testing tool technical field, a kind of multichannel voltage current tester that especially can measure a plurality of signals.
Background technology
In comparatron is used, usually need the current conditions of test circuit under certain voltage, or the voltage condition under certain electric current.At present, usually adopt discrete instrument to test, and manual logging test results, when the signalling channel of circuit-under-test was very many, it is very complicated that this task just becomes.In semiconductor test system is used, we only need to carry out the simple test such as pin connectivity, pin leakage current to specific chip sometimes, and still, the client still needs to use the testing apparatus of very high-end costliness to test, cause the waste of resource, and cost is very high.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of multichannel voltage current tester reasonable in design, with low cost and easy to use is provided.
The utility model solves its technical matters and takes following technical scheme to realize:
A kind of multichannel voltage current tester, comprise PC unit, PXI interface control unit, FPGA unit, ADC converting unit, voltage and current measurement unit, channel selecting control module and tool interface system unit, the PC unit is connected with the FPGA unit by the PXI interface control unit, the FPGA unit is connected with ADC converting unit, voltage and current measurement unit and channel selecting control module, the voltage and current measurement unit is connected with ADC converting unit, channel selecting control module, and the channel selecting control module is connected with measured device by the tool interface system unit.
And described PC unit is made of PC and PXI interface integrated circuit board, and this PXI interface integrated circuit board is connected with the PXI interface control unit.
And described PXI interface integrated circuit board is one or more and is inserted in the expansion slot of PC.
And described PXI interface control unit is connected and composed by Communication Control chip PLX9056 and peripheral circuit thereof, PXI interface control unit and the FPGA unit realization communication function that is connected with PC.
And described FPGA unit is connected and composed by fpga chip XC3s400 and storage chip XCF02SVO20C.
And described ADC converting unit is connected and composed by signal selector ADG704 and AD conversion chip AD7686.
And described electric current and voltage test cell connects and composes by measuring chip AD5522 and peripheral circuit thereof.
And described channel selecting control module is made of relay matrix and relay-operated controller.
And described relay matrix is concerned by connection, the disconnection that 36 dpdt relays are configured for controlling 72 tunnel external testing passages measuring unit passage corresponding with inside, corresponding 4 the close beta passages of this 72 tunnel external testing passage; Described relay-operated controller is the MAX4820 chip.
And described tool interface system unit comprises that 72 drive tests examination access port, 16 outside relays drive port and 12 earth signal ports.
Advantage of the present utility model and good effect are:
1, the measurement that the utility model can a plurality of voltage and current signals of Quick Measurement, support clamp voltage to measure the pattern of electric current, clamp current measuring voltage, have precision height, sample frequency high, be particularly useful for the numerous chip pin on off test of pin, and the test of pin leakage current.
2, the utility model can be configured to only carry out the semiconductor Automatic Test Equipment of pin break-make, leakage current test, satisfies the demand of particular client, greatly reduces testing cost, can be widely used in the semiconductor Auto-Test System.
3, the utility model adopts the PXI interface control of standard, can use easily PC programming and control FPGA unit automatically a plurality of passages quick and precisely to be tested, and test result automatically recorded, carry out various analyses, improved the robotization processing horizontal of system.
4, the utility model is measured much 72 of passage, can measure a large amount of signals fast, and the numerous semiconductor devices of pin especially, and can expand and connect a plurality of this kind instruments, carry out more multichannel test.
Description of drawings
Fig. 1 is johning knot composition of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
A kind of multichannel voltage current tester as shown in Figure 1, comprises PC unit, PXI interface control unit, FPGA unit, ADC converting unit, voltage and current measurement unit, channel selecting control module, tool interface system unit.The PC unit is connected with the FPGA unit by the PXI interface control unit, the FPGA unit is connected with ADC converting unit, voltage and current measurement unit and channel selecting control module, the voltage and current measurement unit is connected with ADC converting unit, channel selecting control module, and the channel selecting control module is connected with measured device by the tool interface system unit.The below describes respectively the modules in the system:
The PC unit is made of PC and PXI interface integrated circuit board, and PC is realized communication function by PXI interface integrated circuit board and FPGA unit, and writing of application program is responsible in the PC unit, and the test data of passing back from the FPGA unit is analyzed.PXI interface integrated circuit board adopts the PXI interface under the standard agreement, and PXI interface integrated circuit board is inserted on the PC, and a PC can insert polylith PXI interface integrated circuit board.
The PXI interface control unit is is mainly connected and composed by Communication Control chip PLX9056 and peripheral circuit thereof, and the PXI interface control unit is realized the communication function of FPGA unit and PC.Communication Control chip PLX9056 supports the PXI communications protocol of standard, and the work of this PLX9056 chip is controlled by the FPGA unit; The auxiliary PLX9056 chip of peripheral circuit is realized the PXI communication function.
The FPGA unit is is mainly connected and composed by fpga chip XC3s400 and storage chip XCF02SVO20C.Fpga chip is the main control chip of instrument, is responsible for the action of ADC converting unit, voltage and current measurement unit, channel selecting control module, and carries out communication by PXI interface control unit and PC unit; Storage chip is used for storing the FPGA control program.
The ADC converting unit is is mainly connected and composed by signal selector ADG704 and AD conversion chip AD7686.Signal selector ADG704 is responsible for 4 tunnel simulating signals of electric current and voltage test cell output are selected, and is strobed into successively the input end of AD conversion chip; The AD conversion chip is responsible for the simulating signal that input end is strobed is changed, and sends the signal of conversion to the FPGA unit.
The electric current and voltage test cell mainly connects and composes by measuring chip AD5522 and peripheral circuit.Measure chip AD5522 and realize measurement function, this measuring unit has 4 test channel, each passage can be realized the function of clamp voltage measuring current, the function of clamp current test voltage, and the simulating signal that test obtains is sent into the ADC converting unit change; Peripheral circuit subsidiary chip is realized its function.
The channel selecting control module mainly is made of relay matrix and relay-operated controller.Relay matrix is made of 36 dpdt relays, the connection of the measuring unit passage that each Control 2 tunnel external testing passage is corresponding with inside, disconnection relation, 72 corresponding 4 close beta passages of external testing passage; The relay-operated controller chip is MAX4820, and each control chip can be controlled the break-make of 8 relays.
The tool interface system unit is made of the instrument output port, and this instrument output port comprises that 72 drive tests examination access port, 16 outside relays drive port and 12 earth signal ports.
Principle of work of the present utility model:
1, layoutprocedure.Write the FPGA control program and be transferred to the FPGA unit by the PXI interface at PC, the command content of FPGA control program comprises to the configuration of ADC converting unit, to the configuration of measuring unit and to the configuration of channel selecting control module.Its layoutprocedure is: the FPGA module is after receiving the instruction that PC transmits, and the program that the FPGA operation is solidificated in the FPGA cell memory is configured the ADC unit, and measuring unit is configured, and the channel selecting control module is configured; The configuration of measuring unit is comprised that the test pattern of measuring unit such as clamp voltage measure electric current, clamp current test voltage, the information such as the voltage range of measuring unit, range of current, testing time, test frequency; Configuration to the ADC converting unit comprises the information such as the output signal of selecting which test cell is changed, inversion frequency; The connection relation information that the configuration of channel selecting unit is comprised the measurement passage that the tool interface system passage is corresponding with it.
2, test process.The FPGA control program is constantly controlled ADC converting unit, measuring unit, channel selecting unit in operational process, makes them finish corresponding actions.Measuring unit is worked under the pattern, range, frequency of configuration, to measuring with the test channel signal of its UNICOM, and will measure simulating signal and deliver to the ADC converting unit and measure; The ADC converting unit is selected the simulating signal of measuring unit output, changes successively; The switching relation of channel selecting unit controls measuring unit and external testing passage.FPGA can constantly read the status information of returning from unit, and the measurement data of reading back from the ADC converting unit, and can PC with these communications by the PXI interface.PC analyzes the test data of FPGA transmission meeting, judges test result.And the each several part status information of returning analyzed, determine the execution of subsequent instructions.
It is emphasized that; embodiment described in the utility model is illustrative; rather than determinate; therefore the utility model comprises and is not limited to the embodiment described in the embodiment; every by those skilled in the art according to other embodiments that the technical solution of the utility model draws, belong to equally the scope of the utility model protection.
Claims (10)
1. multichannel voltage current tester, it is characterized in that: comprise the PC unit, the PXI interface control unit, the FPGA unit, the ADC converting unit, the voltage and current measurement unit, channel selecting control module and tool interface system unit, the PC unit is connected with the FPGA unit by the PXI interface control unit, FPGA unit and ADC converting unit, the voltage and current measurement unit is connected with the channel selecting control module, voltage and current measurement unit and ADC converting unit, the channel selecting control module is connected, and the channel selecting control module is connected with measured device by the tool interface system unit.
2. a kind of multichannel voltage current tester according to claim 1, it is characterized in that: described PC unit is made of PC and PXI interface integrated circuit board, and this PXI interface integrated circuit board is connected with the PXI interface control unit.
3. a kind of multichannel voltage current tester according to claim 2 is characterized in that: described PXI interface integrated circuit board is for one or more and be inserted in the expansion slot of PC.
4. a kind of multichannel voltage current tester according to claim 1, it is characterized in that: described PXI interface control unit is connected and composed by Communication Control chip PLX9056 and peripheral circuit thereof, PXI interface control unit and the FPGA unit realization communication function that is connected with PC.
5. a kind of multichannel voltage current tester according to claim 1, it is characterized in that: described FPGA unit is connected and composed by fpga chip XC3s400 and storage chip XCF02SVO20C.
6. a kind of multichannel voltage current tester according to claim 1, it is characterized in that: described ADC converting unit is connected and composed by signal selector ADG704 and AD conversion chip AD7686.
7. a kind of multichannel voltage current tester according to claim 1 is characterized in that: described electric current and voltage test cell connects and composes by measuring chip AD5522 and peripheral circuit thereof.
8. a kind of multichannel voltage current tester according to claim 1, it is characterized in that: described channel selecting control module is made of relay matrix and relay-operated controller.
9. a kind of multichannel voltage current tester according to claim 1, it is characterized in that: described relay matrix is concerned by connection, the disconnection that 36 dpdt relays are configured for controlling 72 tunnel external testing passages measuring unit passage corresponding with inside, corresponding 4 the close beta passages of this 72 tunnel external testing passage; Described relay-operated controller is the MAX4820 chip.
10. a kind of multichannel voltage current tester according to claim 1 is characterized in that: described tool interface system unit comprises that 72 drive tests examination access port, 16 outside relays drive ports and 12 earth signal ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220482897 CN202815077U (en) | 2012-09-20 | 2012-09-20 | Multi-channel voltage current tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220482897 CN202815077U (en) | 2012-09-20 | 2012-09-20 | Multi-channel voltage current tester |
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| CN202815077U true CN202815077U (en) | 2013-03-20 |
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| CN 201220482897 Expired - Fee Related CN202815077U (en) | 2012-09-20 | 2012-09-20 | Multi-channel voltage current tester |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103295710A (en) * | 2013-04-28 | 2013-09-11 | 哈尔滨工业大学 | Thermistor simulation module and resistor output calibration method thereof |
| CN104251968A (en) * | 2014-10-13 | 2014-12-31 | 北京九方宏信交通装备股份有限公司 | Test bench for driving board of railway DC600 power source system |
| CN104459275A (en) * | 2014-11-28 | 2015-03-25 | 北京振兴计量测试研究所 | Control device and system for freely configuring voltage measurement or output |
| CN104777353A (en) * | 2015-03-27 | 2015-07-15 | 桂林理工大学 | Multichannel low-current collection method and system based on single chip microcomputer control |
| CN106094795A (en) * | 2016-06-28 | 2016-11-09 | 国营芜湖机械厂 | A kind of test system for 80C186 architecture interface plate |
| CN107024612A (en) * | 2017-04-26 | 2017-08-08 | 中国电子科技集团公司第四十四研究所 | The control method of CCD device leakage current test device |
| CN107132395A (en) * | 2017-04-26 | 2017-09-05 | 中国电子科技集团公司第四十四研究所 | Test device for detecting CCD device leakage current |
| CN108761181A (en) * | 2018-03-07 | 2018-11-06 | 珠海欧比特宇航科技股份有限公司 | A kind of acquisition processing device and method of airborne 36V three-phase ac signals |
| CN108802528A (en) * | 2018-06-11 | 2018-11-13 | 中国水利水电科学研究院 | A kind of channel measurement device and method |
| CN109900970A (en) * | 2019-04-02 | 2019-06-18 | 中国原子能科学研究院 | A kind of multi channel detector capacitor automatic measurement system |
| CN109975605A (en) * | 2019-04-02 | 2019-07-05 | 中国原子能科学研究院 | A kind of multi channel detector leakage current automatic measurement system |
-
2012
- 2012-09-20 CN CN 201220482897 patent/CN202815077U/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103295710A (en) * | 2013-04-28 | 2013-09-11 | 哈尔滨工业大学 | Thermistor simulation module and resistor output calibration method thereof |
| CN103295710B (en) * | 2013-04-28 | 2015-10-28 | 哈尔滨工业大学 | Thermistor simulation module and the resistance output calibration steps to this module |
| CN104251968B (en) * | 2014-10-13 | 2017-06-09 | 北京九方宏信交通装备有限公司 | A kind of railway DC600 power-supply system driving plates it is test bed |
| CN104251968A (en) * | 2014-10-13 | 2014-12-31 | 北京九方宏信交通装备股份有限公司 | Test bench for driving board of railway DC600 power source system |
| CN104459275A (en) * | 2014-11-28 | 2015-03-25 | 北京振兴计量测试研究所 | Control device and system for freely configuring voltage measurement or output |
| CN104459275B (en) * | 2014-11-28 | 2017-07-28 | 北京振兴计量测试研究所 | Freely configure the control device and control system of voltage measurement or output |
| CN104777353A (en) * | 2015-03-27 | 2015-07-15 | 桂林理工大学 | Multichannel low-current collection method and system based on single chip microcomputer control |
| CN106094795A (en) * | 2016-06-28 | 2016-11-09 | 国营芜湖机械厂 | A kind of test system for 80C186 architecture interface plate |
| CN107024612A (en) * | 2017-04-26 | 2017-08-08 | 中国电子科技集团公司第四十四研究所 | The control method of CCD device leakage current test device |
| CN107132395A (en) * | 2017-04-26 | 2017-09-05 | 中国电子科技集团公司第四十四研究所 | Test device for detecting CCD device leakage current |
| CN108761181A (en) * | 2018-03-07 | 2018-11-06 | 珠海欧比特宇航科技股份有限公司 | A kind of acquisition processing device and method of airborne 36V three-phase ac signals |
| CN108761181B (en) * | 2018-03-07 | 2020-12-08 | 珠海欧比特宇航科技股份有限公司 | Airborne 36V three-phase alternating current signal acquisition and processing device and method |
| CN108802528A (en) * | 2018-06-11 | 2018-11-13 | 中国水利水电科学研究院 | A kind of channel measurement device and method |
| CN109900970A (en) * | 2019-04-02 | 2019-06-18 | 中国原子能科学研究院 | A kind of multi channel detector capacitor automatic measurement system |
| CN109975605A (en) * | 2019-04-02 | 2019-07-05 | 中国原子能科学研究院 | A kind of multi channel detector leakage current automatic measurement system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20150920 |
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| EXPY | Termination of patent right or utility model |