Automatic test system of vector network analyzer

Abstract

The utility model relates to the technical field of automatic test systems, in particular to an automatic test system for a vector network analyzer, which comprises a test computer, a communication converter, a development board, a first programmable power supply, a second programmable power supply, a digital multimeter, a vector network analyzer, a frequency spectrograph and a test board. The communication converter communicates with the USB interface, and the first programmable power supply is electrically connected between the communication converter and the test board; the development board communicates with the serial interface, and the development board is electrically connected with the test board; the second programmable power supply, the digital multimeter, the vector network analyzer and the frequency spectrograph are respectively connected with the test board electric box, and the second programmable power supply, the digital multimeter, the vector network analyzer and the frequency spectrograph are respectively communicated with the network interface through a local area network. According to the automatic testing system, the efficiency is improved, the testing data are more accurate, the performance of the device can be reflected more truly, and meanwhile, the stored data result is also convenient to analyze and process.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic testing systems, in particular to an automatic testing system for a vector network analyzer. Background Art

[0002] Due to the diverse test parameters and complex test conditions of microwave RF devices, traditional manual testing is inefficient and difficult to meet test requirements. Therefore, it is necessary to improve test efficiency and build an automated test platform. Utility Model Content

[0003] The utility model provides a vector network analyzer automated test system. Through the virtual instrument integrated development environment, the test computer can control the state of the tested device, read the test data or interface and export and store it. Finally, the automatic test effect of "one-key test" is achieved, the test operation is standardized, and the process error rate is reduced.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vector network analyzer automated test system, consisting of a test computer, a communication converter, a development board, a first programmable power supply, a second programmable power supply, a digital multimeter, a vector network analyzer, a spectrum analyzer and a test board; the test computer is provided with a USB interface, a serial interface and a network interface; the communication converter communicates with the USB interface, and the first programmable power supply is electrically connected between the communication converter and the test board; the development board communicates with the serial interface, and the development board is electrically connected to the test board; the second programmable power supply, the digital multimeter, the vector network analyzer and the spectrum analyzer are respectively connected to the test board electrical box, and the second programmable power supply, the digital multimeter, the vector network analyzer and the spectrum analyzer respectively communicate with the network interface through a local area network.

[0005] Preferably, the communication converter is a NI USB-GP IB HS converter, and the first programmable power supply is an E3634A programmable power supply.

[0006] Preferably, a first connector and a second connector are provided on the top of the test board; the development board is electrically connected to the first connector; and it also includes a top plate electrically connected to the second connector, and a test chip is installed on the top plate.

[0007] Preferably, the development board is an Arduino MEGA2560 single-chip microcomputer board.

[0008] Preferably, the second programmable power supply is a DP831A programmable power supply.

[0009] Preferably, the digital multimeter model is 34465A.

[0010] Preferably, the vector network analyzer model is E5080B.

[0011] The utility model has the beneficial effect that: by comparing with the manual test data, it can be found that the results of the manual test and the automatic test are very close, and there is no obvious difference. The automatic test result is better than the manual test result on the whole, because there is no human intervention in the automatic test process, the repeated switching of the radio frequency cable is avoided, and the device under test does not need to be powered on multiple times, so the state of the test system and the device under test is more stable, and the test result is closer to the actual performance of the device under test, and the test time is reduced to less than half of the manual test time. In addition, since LabVIEW does not need to write the driver of the instrument, the instrument control can be conveniently realized, and it is stable and reliable; at the same time, the graphical programming method of LabVIEW is suitable for various programming people. Automated testing not only improves efficiency, but also the test data is more accurate, which can more truly reflect the performance of the device, and the stored data results are also convenient for analysis and processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 This is a schematic diagram of the system structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the bottom plate structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the top plate structure of the utility model;

[0016] Figure 4 This is a schematic diagram of the functions that can be realized by the utility model;

[0017] Figure 5 This is a schematic diagram of the entire process of the automated testing system of the utility model.

[0018] In the figure: 1. test computer; 2. communication converter; 3. development board; 4. first programmable power supply; 5. second programmable power supply; 6. digital multimeter; 7. vector network analyzer; 8. spectrum analyzer; 9. test board; 10. first connector; 11. second connector; 12. top plate; 13. test chip. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings of the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] according to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a vector network analyzer automated test system is composed of a test computer 1, a communication converter 2, a development board 3, a first programmable power supply 4, a second programmable power supply 5, a digital multimeter 6, a vector network analyzer 7, a spectrum analyzer 8 and a test board 9; the test computer 1 is provided with a USB interface, a serial interface and a network interface; the communication converter 2 communicates with the USB interface, and the first programmable power supply 4 is electrically connected between the communication converter 2 and the test board 9; the development board 3 communicates with the serial interface, and the development board 3 is electrically connected to the test board 9; the second programmable power supply 5, the digital multimeter 6, the vector network analyzer 7 and the spectrum analyzer 8 are respectively connected to the test board 9 electrical box, and the second programmable power supply 5, the digital multimeter 6, the vector network analyzer 7 and the spectrum analyzer 8 communicate with the network interface through a local area network.

[0021] The communication converter 2 is a NI USB-GPI B HS converter, the first programmable power supply 4 is an E3634A programmable power supply, the development board 3 is an Ardui no MEGA2560 single-chip microcomputer, the second programmable power supply 5 is a DP831A programmable power supply, the digital multimeter 6 is a 34465A model, and the vector network analyzer 7 is an E5080B model. The top of the test board 9 is provided with a first connector 10 and a second connector 11; the development board 3 is electrically connected to the first connector 10; and it also includes a top plate 12 electrically connected to the second connector 11, and the top plate 12 is installed with a test chip 13.

[0022] In this system, the test computer 1 is the main body of control, and the test software runs inside it. The data storage and display and communication with the equipment are all carried out on the test computer 1. The communication converter 2 is used for the test computer 1 to communicate with the first programmable power supply 4 through the USB port. The development board 3 communicates with the test computer 1 through the serial interface, which is used for switch control and status monitoring during the test. The second programmable power supply 5, the digital multimeter 6, the vector network analyzer 7, and the spectrum analyzer 8 are connected to the test computer 1 through the local area network to receive the control and reading signals sent by the test computer 1. The test board 9 is used for the electrical connection between the test equipment and the device under test and the switching of the circuit. The automated test realized by this system not only improves the efficiency, but also makes the test data more accurate, which can more truly reflect the performance of the device, and the stored data results are also convenient for analysis and processing.

[0023] Among them, the LabVI EW software in the test software is the core of the entire system. When designing the software architecture, the test software is functionally disassembled and divided into multiple modules with single functions, which are constructed into corresponding subVIs. The subVI files to be called are placed in the system file library. The subVIs are called in the top-level program, making the overall software architecture clear and easy to maintain and expand. The subVIs created include path transformation selection, measurement content analysis, storage data writing, power parameter input, mark number input, etc.

[0024] The test software uses the VI SA interface for instrument connection and communication. VI SA is a general term for a set of standard I / O function libraries and their related specifications. The biggest advantage is that it does not distinguish between specific interface types and the software can be used compatibly. Manual measurement using the vector network analyzer 7 requires the establishment of a test program based on the measurement parameters, which is saved inside the vector network analyzer 7 after calibration. After normal operation, the software will communicate with the vector network analyzer 7 through the VI SA resource name.

[0025] In the automatic test system, the vector network analyzer 7 needs to set the test channel trace, test curve, S parameter type, Mark point value test, bandwidth test, ripple test, etc. during the test process, and the active device also needs to set the voltage and current. The automatic test program is written in the test software according to the corresponding vector network analyzer 7 test parameters.

[0026] The hardware circuit of the automated test system is the test board 9, and the control core is the Ardu i no MEGA2560 development board 3. By writing the Firmware service framework program on the development board 3 through the Ardu i no integrated development environment, the computer can use the LabVIEW Ardu i no module to control the IO port of the MEGA2560 development board 3 through the serial port.

[0027] The test board 9 is divided into a bottom board and a top board 12, which are connected by two 32*2 sockets. The bottom board is mainly composed of the Ardu ino MEGA2560 development board 3, which is mainly used for the introduction of power and multimeter channels, the generation of relay control signals, and the lead-out of AD sampling input pins. The top board 12 is used for applying excitation signals of different packaged DUTs and connecting measurement channels.

[0028] In the actual test process, by comparing with the manual test data, it can be found that the results of manual test and automatic test are very close, with no obvious difference. Overall, the automatic test results are better than the manual test results. This is because there is no human intervention in the automatic test process, which avoids repeated switching of RF cables and does not require multiple power-ons to the device under test. Therefore, the state of the test system and the device under test is more stable, and the test results are closer to the actual performance of the device under test. At the same time, the test time is reduced to less than half of the manual test time. In addition, since LabVIEW does not require writing instrument drivers, instrument control can be easily achieved, and it is stable and reliable; at the same time, LabVIEW's graphical programming method is suitable for all kinds of programming people. Automated testing not only improves efficiency, but also makes test data more accurate, which can more realistically reflect the performance of the device. At the same time, the stored data results are also convenient for analysis and processing.

[0029] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A vector network analyzer automated test system, characterized in that , consisting of a test computer (1), a communication converter (2), a development board (3), a first programmable power supply (4), a second programmable power supply (5), a digital multimeter (6), a vector network analyzer (7), a spectrum analyzer (8) and a test board (9); The test computer (1) is provided with a USB interface, a serial interface and a network interface; The communication converter (2) communicates with the USB interface, and the first programmable power supply (4) is electrically connected between the communication converter (2) and the test board (9); The development board (3) communicates with the serial interface, and the development board (3) is electrically connected to the test board (9); The second programmable power supply (5), the digital multimeter (6), the vector network analyzer (7) and the spectrum analyzer (8) are respectively connected to the electrical box of the test board (9), and the second programmable power supply (5), the digital multimeter (6), the vector network analyzer (7) and the spectrum analyzer (8) respectively communicate with the network interface via a local area network.

2. The vector network analyzer automated test system according to claim 1, characterized in that: The communication converter (2) is a NI USB-GPIB HS converter, and the first programmable power supply (4) is an E3634A programmable power supply.

3. The vector network analyzer automated test system according to claim 2, characterized in that: The test board (9) is provided with a first connector (10) and a second connector (11) on the top; the development board (3) is electrically connected to the first connector (10); and also includes a top plate (12) electrically connected to the second connector (11), and a test chip (13) is installed on the top plate (12).

4. The vector network analyzer automated test system according to claim 3, characterized in that: The development board (3) is an Arduino MEGA2560 single-chip microcomputer board.

5. The vector network analyzer automated test system according to claim 1, characterized in that: The second programmable power supply (5) is a DP831A programmable power supply.

6. The vector network analyzer automated test system according to claim 1, characterized in that: The model of the digital multimeter (6) is 34465A.

7. The vector network analyzer automated test system according to claim 1, characterized in that: The model of the vector network analyzer (7) is E5080B.

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