CN108375759B - High-integration-level line source automatic testing device and testing method - Google Patents
High-integration-level line source automatic testing device and testing method Download PDFInfo
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- CN108375759B CN108375759B CN201810311184.1A CN201810311184A CN108375759B CN 108375759 B CN108375759 B CN 108375759B CN 201810311184 A CN201810311184 A CN 201810311184A CN 108375759 B CN108375759 B CN 108375759B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention provides a high-integration-level line source automatic testing device and a testing method. The invention solves the problems of low efficiency of manually switching signals and manually recording data in the traditional manual testing process. Secondly, the uncertainty of the original test on a non-quantitative distance is solved by designing a special test frame. Through calculation, the manual test time of the single line source after the test device is adopted is shortened to only 3 minutes from the original 20 minutes, and the efficiency is improved by more than 7 times. The system is suitable for testing the same type of line sources in various radars, and provides a testing and debugging platform for independent plug-ins which cannot construct the whole system.
Description
Technical Field
The invention relates to the technical field of automatic testing of miniaturized antenna units with higher integration level, in particular to an automatic testing device and an automatic testing method for a high-integration-level line source.
Background
The radar system has a plurality of hardware devices and a plurality of module types, and all module-level circuits adopt an integrated design in order to improve the link performance and the system integration level. Taking an antenna unit as an example, in order to improve the sensitivity of the system and improve the integration level, a design of integrating a plurality of antenna units with a synthesis network, a limiter and even a low noise amplifier is generally adopted to form 1 line source module. In order to cover an angular range of airspace, a large antenna array is formed by a certain number of line sources. Thus, a set of such products may have hundreds to thousands of line source modules.
In the current industry, electronic devices are becoming modularized and miniaturized, and meanwhile, the requirements for testing are also increasing. In the traditional mode, each test is finished one by one in a manual fixing, manual testing and manual recording mode at a non-quantitative distance, and the whole test environment is relatively crude; the test means is comparatively late; the test efficiency is low, and it takes about 20 minutes to test each line source on average. More importantly, the working stability is not guaranteed because the data between batches have larger deviation not in a quantitative environment and distance.
Disclosure of Invention
In order to solve the technical defects in the prior art, a high-integration-level line source automatic testing device and a testing method.
The invention is realized by the following technical scheme:
the high-integration automatic testing device for the line source is used for testing the signal transceiving performance of the line source assembly; the measured line source assembly includes: a pair of first line source and second line source which have the same structure and can realize signal receiving and transmitting; the testing device comprises a testing cabinet assembly and a testing bracket assembly, wherein the testing cabinet assembly comprises a testing cabinet and a testing bracket;
the test cabinet assembly includes a cabinet, and a test cabinet integrally mounted within the cabinet:
the computer is used for controlling the whole machine of the testing device to work;
the vector network analyzer is used for acquiring and analyzing the signals transmitted and received by the line source assembly; the vector network analyzer is respectively connected with the computer, the first line source and the second line source;
the programmable power supply is used for supplying power to the tested line source assembly and the test support assembly; the programmable power supply is connected with the vector network analyzer;
the test rack assembly includes a first rack, a second rack, and a receiving source holding box, wherein:
the first line source is fixedly arranged on the first bracket;
the receiving source fixing box is fixedly arranged on the second bracket; the second line source is connected with the receiving source fixing box in a mounting way;
the internal circuit of the receiving source fixing box comprises a plurality of signal receiving socket groups, a multiple-selection switch and a digital input-output module; wherein the signal receiving socket set is matched with the output interface set of the second line source; the number of the signal receiving socket groups is the same as the number of the input end interfaces of the one-out-of-multiple switch, the output end interfaces of the one-out-of-multiple switch are in communication connection with the vector network analyzer, and the control end of the one-out-of-multiple switch is connected with the wiring end of the digital input/output module; the control end of the digital input/output module is in communication connection with the computer;
the computer controls the vector network analyzer to drive the first line source to send out radio frequency signals, the second line source receives the radio frequency signals and sends the radio frequency signals to the multiple switch, the computer controls the multiple switch to selectively output the required radio frequency signals to the vector network analyzer for data acquisition and analysis, and the vector network analyzer sends analysis results to the computer.
The method for realizing automatic test of the line source by using the testing device provided by the invention comprises the following steps:
step S1, controlling the vector network analyzer to drive the programmable power supply to supply power by using the computer;
s2, controlling the vector network analyzer to drive the first line source to emit radio frequency signals by using the computer;
s3, receiving the radio frequency signal by using the second line source and sending the radio frequency signal to a plurality of switches;
s4, controlling the digital input/output module to drive the one-to-many switch to selectively output the required radio frequency signals to the vector network analyzer by utilizing the computer for automatic calibration or automatic test;
and step S5, transmitting the result of automatic calibration or automatic test to the computer by using the vector network analyzer. Compared with the prior art, the invention has the beneficial effects that:
(1) The invention provides an automatic testing device with universality, openness and modularization. The multi-channel radio frequency input interface is reserved on the panel, so that automatic testing of all interface signals can be finished after the tested piece and the testing device are assembled with a plurality of modules at most once, the situation of repeatedly twisting cables is avoided, and the testing efficiency is improved.
(2) The invention adopts a compatible design. The multi-selection switch in the receiving source fixing box adopts a broadband design, can cover the antenna unit test requirement of S-X wave bands, and is suitable for automatic test of multi-type product line sources.
(3) The invention is beneficial to optimizing the debugging environment and improving the debugging and testing modes, so that the invention is developed to the aspects of specialization, industrialization and high efficiency. The device not only has an automatic test function, but also can be used as a debugging platform, and solves the problems of poor stability, low efficiency and the like of the original debugging station by integrating the existing resources. From a single decentralized manual tuning mode, a development is made to an integrated and efficient automatic mode.
Drawings
FIG. 1 is a block diagram of a high-integration line source automatic test equipment.
FIG. 2 is a schematic view of a test stand assembly in use.
Fig. 3 is a schematic diagram of a structure of a line source to be tested.
Fig. 4 is a front view of the test stand assembly in use.
Fig. 5 is a top view of the test stand assembly in use.
Fig. 6 is a schematic diagram of the internal wiring relationship of the receiving source holding tank.
Fig. 7 is a schematic view of the structure of the front panel of the receiving source holding box.
Fig. 8 is a schematic view of the rear panel structure of the receiving source holding case.
FIG. 9 is a schematic diagram of an automatic calibration operation test procedure.
FIG. 10 is a schematic diagram of an automatic test operation test flow.
FIG. 11 is a signal flow diagram of a dual port error model.
Fig. 12 is a schematic diagram of an S parameter measurement signal.
The same reference numbers are used throughout the drawings to reference like elements or structures, including:
the system comprises a cabinet 1, a fan 2, a computer 3, a bracket 4, a vector network analyzer 5, a program-controlled power supply 6, a test cable 7, a test support assembly 8, a line source fixing clamp 9, a first support 10, a connecting rod 11, a second line source 12, a receiving source fixing box 13, a second support 14, a first line source 15, a multiple-selection switch 16, a digital input-output module 17, a signal coupling socket 18, a power supply output socket 19, a signal receiving socket 20, a power supply socket 21, a radio frequency output socket 24, an antenna unit 25 and a 12-in-1 synthetic coupling network module 26, a receiving front end module 27, a positioning bolt 28, a line source coupling interface 29, a line source output interface 30 and a line source power interface 31.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description is presented by way of example only and is not intended to limit the invention.
Example 1:
the embodiment provides a high-integration-level line source automatic testing device which is used for testing signal receiving and transmitting performance of a line source assembly. The measured line source assembly includes: a pair of first line sources 15 and second line sources 12 having the same structure and transmitting and receiving signals.
The second line source 12 and the first line source 15 in the present invention are the same line source, and the same line source is used. As shown in FIG. 3, the tested line source is a high-integration active antenna, the front panel of which is provided with 12 antenna units 25, 1 12-in-1 composite coupling network module 26 and 1 receiving front end module 27 are arranged inside, and two ends of the rear panel are provided with 2 positioning bolts 28 for mounting and fixing.
When the line source radiates a signal, i.e. as the first line source 15 for realizing the radiating function, the signal is first coupled to the internal 12 in 1 composite coupling network module 26 via the line source coupling interface 29 and radiated via the 12 antenna elements 25 of the front panel.
When the line source receives signals, that is, when the line source is the second line source 12 for realizing the receiving function, the signals are received by the 12 antenna units 25 of the front panel, then the signals are synthesized by the internal 12 in 1 synthesis coupling network module 26, and finally amplified by the receiving front end module 27 and outputted from the line source output interface 30 of the rear panel. The back panel's line source power interface 31 provides a power supply for the receiving front end module 27.
As shown in fig. 1, the test apparatus includes a test cabinet assembly and a test rack assembly 8, wherein;
the test cabinet assembly comprises a cabinet 1 and a test cabinet integrally installed in the cabinet 1:
and the computer 3 is used for controlling the whole machine of the testing device to work.
A vector network analyzer 5 for acquiring and analyzing the signals transmitted and received by the line source assembly; the vector network analyzer 5 is connected to the computer 3, the first line source 15, and the second line source 12, respectively. In practical application, the vector network analyzer 5 may be a microwave vector network analyzer with model AV3629D manufactured by 41 of chinese electric department, and the vector network analyzer with model is a high-performance integrated measuring instrument with proper price and superior performance, and can comprehensively measure network parameters. The measuring speed, the measuring precision and the intellectualization of the device reach higher level, and the measuring frequency can cover 45 MHz-20 GHz. Can meet the increasing test demands of microwave networks. The whole machine has the characteristics of quick scanning, large dynamic range, low trace noise, high stability and the like, and adopts a software and hardware platform formed by an embedded computer module and a Windows operating system, a highly integrated excitation signal module, a four-channel amplitude-phase mixing receiving module and powerful error correction and calibration software.
A programmable power supply 6 for supplying power to the line source assembly to be tested and the test stand assembly 8. The programmable power supply 6 is connected with the vector network analyzer 5. In practical application, the programmable power supply 6 can select a weft fixing power supply with the model of PPT-1830, and can output 3 paths of direct current stabilized power supplies with the voltage range of 0-18V and the current range of 0-5A at the same time, thereby meeting the requirements of 8 line sources in the invention on the power supply by simultaneously working and eight switches.
In practical application, the computer 3 is connected with the vector network analyzer 5 through a USB/GPIB acquisition card; the network analyzer 5 is connected with the programmable power supply 6 through a GPIB cable, and the control of the computer 3 on the vector network analyzer 5 and the programmable power supply 6 is realized through the connection. The vector network analyzer 5 is connected to the first line source 15 and the second line source 12, respectively. Specifically, the test cable 7 can be a semi-flexible radio frequency cable of the BELDEN company with the model of 1673A, and the model cable has the characteristics of small insertion loss, easy bending and forming and the like, and meets the requirements of the invention.
As shown in fig. 2, 4 and 5, the test rack assembly 8 includes a first rack 10, a second rack 14 and a receiving source holding box 13, wherein:
the first line source 15 is fixedly mounted on the first support 10. Specifically, a line source fixing clip 9 may be provided on the first support 10, and the line source 15 may be clamped and fixed by the line source fixing clip 9.
The receiving source fixing box 13 is fixedly arranged on the second bracket 14; the second line source 12 is mounted in the receiving source holding tank 13.
The first support 10 and the second support 14 are fixedly connected through a connecting rod 11, so that the position between the first line source 15 and the second line source 12 is ensured to be suitable.
As shown in fig. 6 to 8, the internal circuit of the source-receiving fixed box 13 includes a plurality of signal receiving socket sets, a one-to-many switch 16 and a digital input-output module 17; wherein the set of signal receiving receptacles is matched with the set of output interfaces of the second line source 12; the number of the signal receiving socket groups is the same as the number of the input end interfaces of the one-for-many switch 16, the output end interfaces of the one-for-many switch 16 are connected with the vector network analyzer 5, and the control end of the one-for-many switch 16 is connected with the wiring end of the digital input/output module 17; the control end of the digital input/output module 17 is connected with the computer 3 in a communication way.
The computer 3 controls the vector network analyzer 5 to drive the first line source 1 to send out radio frequency signals, the second line source 12 receives the radio frequency signals and sends the radio frequency signals to the multiple switch 16, the computer 3 controls the multiple switch 16 to selectively output the required radio frequency signals to the vector network analyzer 5 for data acquisition and analysis, and the vector network analyzer 5 sends analysis results to the computer 3.
Specifically, in this embodiment, the source-receiving fixed box 13 includes an outer box, and the one-to-many switch 16 and the digital input-output module 17 are integrally installed in the outer box; a front panel and a rear panel are arranged in the outer box, a plurality of signal receiving socket groups are arranged on the front panel, and a radio frequency output socket 24 and a power input socket 21 are arranged on the rear panel; the radio frequency output socket 24 is connected with the output port of the one-to-many switch 16 and is connected with the vector network analyzer 5 through a test cable 7; the power input socket 21 is connected with the programmable power supply 6 through a cable, and supplies power to the signal receiving socket set, the one-to-many switch 16 and the digital input/output module 17 respectively.
In order to realize the one-time test of a plurality of line sources, the invention is provided with a plurality of signal receiving socket groups, and the switch is used for gating. In this embodiment, the number of the signal receiving jack groups may be set to 8, and correspondingly, the one-to-one switch 16 is an one-to-eight switch, and the 8 signal receiving jack groups are in one-to-one correspondence with 8 input ends of the one-to-eight switch.
The digital input/output module 17 may be a digital IO control module with a model number of USB-6501, which is manufactured by National Instruments (NI).
The signal receiving socket set comprises a signal coupling socket 18, a power output socket 19 and a signal receiving socket 20; the signal coupling socket 18 mates with the line source coupling interface 29 of the second line source 12, the power output socket 19 mates with the line source power interface 31 of the second line source 12, and the signal receiving socket 20 mates with the line source output interface 30 of the second line source 12.
Specifically, the 8 signal receiving receptacles 20 in the front panel may be correspondingly connected to the 8 input terminals J1-J8 of the one-to-many switch 16 by a semi-flexible cable of model 1673 series. The output interface Jc end of the eight-select switch is connected with the radio frequency output socket 24 of the rear panel through 1673 series semi-flexible cables. The 8 power outlet receptacles 19 in the front panel may be connected together to the power inlet receptacle 21 of the rear panel by furcation cables made by coaxial cables of the type SYV50-2-2 series.
As a preferred embodiment, a fan 2 may be disposed in the cabinet 1, and it is recommended that the fan 2 be disposed on the computer 3, so as to facilitate heat dissipation inside the computer 3 and the cabinet 1. To facilitate fixing, mounting, dismounting, maintenance and replacement of the computer 3, a bracket 4 may be provided in the cabinet 1, and the computer 3 may be placed and mounted on the bracket 4.
The fan 2, the computer 3, the vector network analyzer 5 and the programmable power supply 6 in the cabinet 1 are all connected with 220V commercial power through power lines.
The specific technical principle and working process of the automatic testing device for line source provided in this embodiment will be described together with the testing method provided in embodiment 2, and will not be described here again.
Example 2:
the present embodiment provides a method for implementing automatic testing of a line source by using the testing device disclosed in embodiment 1. Before the test method is implemented, the hardware equipment of the test device is connected well, and the specific connection relation is as follows:
the fan 2, the computer 3, the vector network analyzer 5 and the programmable power supply 6 in the cabinet 1 are all connected with 220V commercial power through power lines. The computer 3 is connected with the vector network analyzer 5 through a USB/GPIB acquisition card, and the vector network analyzer 5 is connected with the programmable power supply 6 through a GPIB cable.
The first line source 15 is installed on the first bracket 10 in a erection mode, a plurality of second line sources 12 to be detected are connected with the receiving source fixing box 13 in a mounting mode, and a line source coupling interface 29, a line source power interface 31 and a line source output interface 30 of one second line source 12 are respectively in one-to-one corresponding plug-in connection with a signal coupling socket 18, a power output socket 19 and a signal receiving socket 20 of one signal receiving socket group in the receiving source fixing box 13. In this embodiment, a maximum of 8 second line sources 12 may be installed.
The vector network analyzer 5 is connected to the line source coupling interface 29 of the first line source 15 and the radio frequency output socket 24 of the receiving source fixing box 13 through the test cable 7, respectively.
The programmable power supply 6 is connected to the line source power interface 31 of the first line source 15 and the power input socket 21 of the receiving source fixing box 13 through cables.
The test method provided by the embodiment comprises the following steps:
and S1, controlling the vector network analyzer 5 to drive the programmable power supply 6 to supply power by using the computer 3. Specifically, the computer 3 is used to call the driving function of the programmable power supply 6, initialize the programmable power supply 6, set the required voltage and current power supply parameters, and supply power to the testing device and the tested line source assembly respectively.
And S2, controlling the vector network analyzer 5 to drive the first line source 1 to emit radio frequency signals by using the computer 3.
Specifically, the computer 3 is used to initialize the vector network analyzer 5 by calling the driving function of the vector network analyzer 5 by using LabVIEW programming software, and to set basic parameters for the vector network analyzer. The basic parameter settings specifically include the following: setting the initial frequency to 8GHz-12GHz; setting the signal power to 0dBm; setting a transmission test mode; setting Marker point information: information marking of five frequency points of 8GHz, 9GHz, 10GHz, 11GHz and 12GHz is carried out.
Step S3, receiving the radio frequency signal by using the second line source 12 and sending the radio frequency signal to the multiple switch 16.
And S4, controlling the digital input/output module 17 to drive the one-for-many switch 16 to selectively output the required radio frequency signals to the vector network analyzer 5 by utilizing the computer 3 for automatic calibration or automatic test.
Specifically, the computer 3 is used to control the digital input/output module 17 to generate a set of control codes, the one-to-many switch 16 selects a corresponding path of signals to pass through according to the control codes, and the vector network analyzer 5 performs automatic calibration or automatic test on the selected path of signals.
Further, the control code here may be a 3-bit 2-ary control code (variable range: 000-111) that controls the gating of the one-to-eight switch in a time-sharing manner under the guidance of the computer 3. The first signal passes through the one-to-eight switch when the control code is "000", the eighth signal passes through the one-to-eight switch when the control code is "111", and so on. And repeating the cycle for 8 times to finish the automatic calibration or automatic test of 8 paths of signals.
Step S5, transmitting the result of the automatic calibration or the automatic test to the computer 3 by using the vector network analyzer 5. As can be seen from the above step S4, the test method provided in this embodiment includes two modes, namely automatic calibration and automatic test, and is specifically described below:
1. automatic calibration
In step S4, the eight-selecting switch is controlled to gate a corresponding signal at a time, and the process is repeated for 8 times to complete the calibration data test of the 8 signals, and finally the calibration data test is summarized and arranged to form an EXCL file for output. The specific technical principle of the calibration is as follows:
it is well known that the performance of microwave components is generally described by scattering parameters, e.g. a dual port network has S LR 、S 12 、S 21 And S is 22 The four parameters are collectively referred to as "S-parameters", and it is one of these parameters that is directly measured by the vector network analyzerThe testing principle of the instrument is shown in fig. 12. When working in the forward state, the port 2 is connected with a matching load to measure the reference incident wave a of the signal source 1 Reflected wave b 1 And a transmission wave b through the DUT 2 S can be obtained 11 ＝b 1 /a 1 And S is 21 ＝b 2 /a 1 The method comprises the steps of carrying out a first treatment on the surface of the When working in the reverse state, the port 1 is connected with a matching load to measure the reference incident wave a of the signal source 2 Reflected wave b 2 And a transmission wave b through the DUT 1 S can be obtained 12 ＝b 1 /a 2 And E is DF 。
The calibration of the vector network analyzer 5 aims to eliminate systematic errors of the test. The method comprises the steps of obtaining a specific numerical value of a system error term of the vector network analyzer 5 through testing a standard component (a linear source), and then correcting a tested component test result through calculation to eliminate error components and obtain a true value of the tested component. The error model commonly used in the prior art is divided into a single-port error model and a double-port error model, and the calibration used in the invention adopts the frequency response calibration in a double-port mode. The signal flow diagram of the error model is shown in fig. 11. In the error model, an S parameter subscript A represents the actual S parameter of the DUT, an S parameter subscript M represents the S parameter obtained by vector network measurement, and E DF And E is DR Is a directional error; e (E) SF And E is SR Is a source mismatch error; e (E) LF And E is LR Is a load mismatch error; e (E) TF And E is TR Is a transmission error; e (E) RF And E is RR Is a reflective error; e (E) XF And E is XR For isolation errors, where subscript F represents forward error and subscript R represents reflected error. The result of solving the signal flow is shown in the following formula (1):
the two ports are symmetrical when calibrating, when the open circuit device is respectively added at the test end (S 11A ＝1,S 22A ＝S 21A ＝S 12A =0), short-circuiting device (S 11A ＝-1,S 22A ＝S 21A ＝S 12A When matching load (S) 11A ＝S 22A ＝S 21A ＝S 12A =0), can be reduced to:
based on the error model of two-port calibration, after two-port calibration, the test of a certain S parameter result needs to be carried out by a network analyzer in a forward and reverse bidirectional test, and the error elimination operation is carried out on the test result by using the other three S parameters. The test process needs to select different corresponding calibration modes according to test parameters and test precision requirements. The calibration in the invention adopts frequency response calibration, and the transmission test is carried out in a straight-through mode, which is mainly used for eliminating loss errors generated by different frequency points and does not require high precision.
2. Automatic test
As shown in FIG. 10, in step S4, the eight-way switch is controlled to gate the corresponding way of signal once, and the above steps are repeated for 8 times to complete the automatic test of the 8-way line source. The comparison between the data to be tested and the data to be tested in the calibration process is summarized and output after the data to be tested are arranged in the test process, so that errors caused by the loss of the cable and the switch are eliminated, and finally the EXCL file output is formed.
In practical application, the automatic calibration and automatic test method can be realized by software development based on graphic software LabVIEW.
In summary, the invention realizes the automatic test function and the automatic test data arrangement function of all output signals after the 8 line source modules are installed at one time, solves the problem of low efficiency of manually switching signals and manually recording data in the traditional manual test process, and optimizes the debugging environment. Through calculation, the manual test time of the single line source after the test device is adopted is shortened to only 3 minutes from the original 20 minutes, and the efficiency is improved by more than 7 times. The system is suitable for testing the same type of line sources in various radars, and provides a testing and debugging platform for independent plug-ins which cannot construct the whole system.
It will be readily appreciated by those skilled in the art that the foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (9)
1. The high-integration automatic testing device for the line source is used for testing the signal transceiving performance of the line source assembly; the tested line source assembly comprises: a pair of first line sources (15) and second line sources (12) which have the same structure and realize signal transmission and reception; the method is characterized in that: the test device comprises a test cabinet assembly and a test bracket assembly (8), wherein;
the test cabinet assembly comprises a cabinet (1) and a test cabinet integrally installed in the cabinet (1):
a computer (3) for controlling the whole machine of the testing device to work;
a vector network analyzer (5) for acquiring and analyzing the signals transmitted and received by the line source assembly; the vector network analyzer (5) is respectively connected with the computer (3), the first line source (15) and the second line source (12);
a programmable power supply (6) for supplying power to the tested line source assembly and the test support assembly (8); the programmable power supply (6) is connected with the vector network analyzer (5);
the test rack assembly (8) comprises a first rack (10), a second rack (14) and a receiving source holding box (13), wherein:
the first line source (15) is fixedly arranged on the first bracket (10);
the receiving source fixing box (13) is fixedly arranged on the second bracket (14); the second line source (12) is connected with the receiving source fixing box (13) in a mounting way;
the internal circuit of the receiving source fixing box (13) comprises a signal receiving socket group, a multiple-selection switch (16) and a digital input-output module (17); wherein the signal receiving socket set is matched with the output interface set of the second line source (12); the number of the signal receiving socket groups is the same as the number of the input end interfaces of the one-out-of-multiple switch (16), the output end interfaces of the one-out-of-multiple switch (16) are in communication connection with the vector network analyzer (5), and the control end of the one-out-of-multiple switch (16) is connected with the wiring end of the digital input/output module (17); the control end of the digital input/output module (17) is in communication connection with the computer (3);
the computer (3) controls the vector network analyzer (5) to drive the first line source (15) to send out radio frequency signals, the second line source (12) receives the radio frequency signals and sends the radio frequency signals to the multiple-selection switch (16), the computer (3) controls the multiple-selection switch (16) to selectively output required radio frequency signals to the vector network analyzer (5) for data acquisition and analysis, and the vector network analyzer (5) sends analysis results to the computer (3).
2. The test device of claim 1, wherein: the receiving source fixing box (13) specifically comprises an outer box, and the one-to-many switch (16) and the digital input/output module (17) are integrally arranged in the outer box; the outer box is internally provided with a front panel and a rear panel, the signal receiving socket groups are arranged on the front panel, and the rear panel is provided with a radio frequency output socket (24) and a power input socket (21); the radio frequency output socket (24) is connected with the output port of the one-out-of-multiple switch (16) and is connected with the vector network analyzer (5) through a test cable (7); the power input socket (21) is connected with the programmable power supply (6) through a cable and respectively supplies power to the signal receiving socket group, the one-out-of-multiple switch (16) and the digital input/output module (17);
the number of the signal receiving socket groups is 8, and the one-to-many switch (16) is an eight-to-one switch; the signal receiving socket group comprises a signal coupling socket (18), a power output socket (19) and a signal receiving socket (20); the output interface group of the second line source (12) comprises a line source coupling interface (29), a line source power interface (31) and a line source output interface (30); the signal coupling socket (18) is matched with the line source coupling interface (29), the power output socket (19) is matched with the line source power interface (31), and the signal receiving socket (20) is matched with the line source output interface (30).
3. The test device according to claim 1 or 2, wherein:
the first support (10) and the second support (14) are fixedly connected through a connecting rod (11), so that the position between the first line source (15) and the second line source (12) is ensured to be suitable.
4. The test device according to claim 1 or 2, wherein:
the computer (3) is connected with the vector network analyzer (5) through a USB/GPIB acquisition card;
the vector network analyzer (5) is a microwave vector network analyzer with the model of AV 3629D; the network analyzer (5) is connected with the programmable power supply (6) through a GPIB cable; the vector network analyzer is respectively connected with the first line source (15) and the second line source (12) through a test cable (7);
the digital input/output module (17) is a digital IO module with the model of USB-6501.
5. The test device according to claim 1 or 2, wherein:
a fan (2) is arranged in the cabinet (1), and the fan (2) is positioned above the computer (3);
a bracket (4) is arranged in the cabinet (1), and the computer (3) is placed on the bracket (4).
6. A method for implementing automatic testing of a line source by using a testing device according to claim 1, comprising the steps of:
step S1, controlling the vector network analyzer (5) to drive the programmable power supply (6) to supply power by using the computer (3);
s2, controlling the vector network analyzer (5) to drive the first line source (15) to emit radio frequency signals by utilizing the computer (3);
step S3, the second line source (12) is utilized to receive the radio frequency signal and send the radio frequency signal to a multi-option switch (16);
s4, controlling the digital input/output module (17) to drive the one-out-of-many switch (16) to selectively output a required radio frequency signal to the vector network analyzer (5) by utilizing the computer (3) for automatic calibration or automatic test;
and step S5, transmitting the result of automatic calibration or automatic test to the computer (3) by using the vector network analyzer (5).
7. The test method according to claim 6, wherein the step S1 is specifically:
and calling a driving function of the programmable power supply (6) by using the computer (3), initializing the programmable power supply (6), setting voltage and current power supply parameters, and respectively supplying power to the testing device and the tested line source assembly.
8. The test method according to claim 6, wherein the step S2 is specifically:
and calling a driving function of the vector network analyzer (5) by using the computer (3), initializing the vector network analyzer (5), setting a starting frequency, setting signal power, setting a test mode and setting Marker point information.
9. The test method according to claim 6, wherein the step S4 is specifically:
and the computer (3) is used for controlling the digital input/output module (17) to generate a group of control codes, the one-to-many switch (16) selects a corresponding path of signal to pass through according to the control codes, and the vector network analyzer (5) automatically calibrates or automatically tests the selected path of signal.
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