CN104849687A - Microwave automatic test system calibration method based on scattering parameter cascading - Google Patents
Microwave automatic test system calibration method based on scattering parameter cascading Download PDFInfo
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Abstract
The invention provides a microwave automatic test system calibration method based on scattering parameter cascading, comprising the following steps: determining all test channels contained in calibration and test and basic composition units of each test channel according to the specific test application state, and performing corresponding multidimensional condition mapping scattering parameter calibration data configuration; making a system configure test instruments and equipment for self-calibration according to specific test application configuration information; and performing test application of a microwave automatic test system according to specific test application requirements when calibration data configuration is completed, and correcting error in real time according to calibration data to obtain a test result with high test accuracy. By adopting the method, the problem that test accuracy decrease and test failure are caused by limited self-calibration test performance of a universal test instrument due to a complex test channel, irregular requirements and other reasons in the automatic test process is solved effectively.
Description
Technical field
The present invention relates to microwave testing field, particularly a kind of microwave Calibration Method for ATS.
Background technology
Along with the fast development of microwave technology, microelectric technique, infotech, the function promoting object to be tested self is enriched more, technology composition is more complicated and deep with integrated fusion, proposes renewal, higher technical requirement to thus measuring technology or Related product.
New testing requirement can not be adapted under many circumstances based on the content measurement of traditional separate unit instrument and equipment and pattern framework, to merging synthesization, informationization, robotization in automatic Synthesis observing and controlling integrally and information interaction Mode change, also needing to innovate proposing or forming the detection calibration technique and method adapted with it simultaneously.
At present for the detection calibration mode that the calibration of microwave Auto-Test System generally adopts original position online, namely before microwave Auto-Test System is tested, power meter is connected to respectively each that be connected with tested object and tests end, by the collaborative calibration testing with signal source, the insertion loss (systematic error) of each test channel microwave Auto-Test System automatically built in test process extracts, there is provided the follow-up error correction of test and data processing, to improve test accuracy; Or the detection calibration face of vector network analyzer is tested end from instrument selftest ports-Extending to each being connected with tested object, the systematic error of each constructed in test process for microwave Auto-Test System test channel is undertaken revising by the calibration testing carrying out vector network analyzer in detection calibration face and processes, to improve test accuracy.
Adopt signal source in prior art, mode that power meter works in coordination with calibration correction test channel insertion loss (systematic error) have following shortcoming:
(1), in actual Test Application, often because the passage of automatic Synthesis test is complicated with unconventional requirement, there is power meter and cannot be connected to the situation that each that be connected with tested object tests end, now which cannot be suitable for;
(2), the port mismatch of power meter self introduces error thus reduces final test accuracy to the correction of insertion loss (systematic error);
(3), power meter needs to be connected to respectively each that be connected with tested object and tests end, and calibration testing process length consuming time, efficiency are lower;
(4) if the component units of test channel changes, the insertion loss (systematic error) of corresponding test channel needs to re-start calibration and revise, the effective utilization of influential system;
Vector network analyzer is adopted to have following shortcoming in the mode of detection calibration face extended mode calibration correction test channel systematic error in prior art:
(1), in actual Test Application, often due to passage complexity and unconventional requirement of automatic Synthesis test, path between the instrument test port of vector network analyzer and detection calibration face (expansion) grows (insertion loss is large), mismatch link is many, combination of channels state is many, exceed the claimed range of the required state of the art of vector network analyzer calibration, calibrate inefficacy in the calibration accuracy in detection calibration face poor even causing, the requirement of test accuracy cannot be met;
(2), the calibration testing of vector network analyzer needs to carry out in each detection calibration face, and calibration testing process length consuming time, the efficiency of whole test macro multiple channel test alignment surface are lower;
(3) if the component units of test channel changes, the systematic error of corresponding test channel needs to re-start calibration and revise, the effective utilization of influential system;
(4) in actual Test Application, can exist toward contact and vector network analyzer cannot be used to carry out the situation of calibration correction to test channel systematic error, at this moment use current calibrating mode cannot meet Test Application requirement.
In the practical application of microwave Auto-Test System, a kind of detection calibration method being applicable to Auto-Test System is proposed, due to reasons such as test channel complexity and unconventional requirements in effective solution automatic testing process, causing limited the caused test accuracy of instrument self-aligning test performance to decline or test failure, is current problem demanding prompt solution.
Summary of the invention
The present invention proposes a kind of microwave Calibration Method for ATS based on scattering parameter cascade, because test channel is complicated and the reason such as unconventional requirement in effective solution automatic testing process, limited the caused test accuracy of universal tester self-aligning test performance is caused to decline the problem of even test failure.
Technical scheme of the present invention is achieved in that
Based on a microwave Calibration Method for ATS for scattering parameter cascade, based on visualized graph interface wizard-like man-machine interaction steer mode, comprise the following steps:
Step (1): according to the concrete Test Application state of microwave Auto-Test System, determine to calibrate and test the whole test channel and each basic composition unit thereof that comprise, and carry out with this calibration data configuration that corresponding multidimensional condition maps scattering parameter;
Step (2): according to the concrete Test Application configuration information of microwave Auto-Test System, control system configures each testing tool equipment and carries out self calibration;
Step (3): according to the concrete Test Application configuration information of microwave Auto-Test System, each basic composition unit existing multidimensional condition being mapped to scattering parameter calibration data carries out calling and configuration of calibration data;
Step (4): according to the concrete Test Application configuration information of microwave Auto-Test System, to the system each test channel basic composition unit not having multidimensional condition to map the calibration data of scattering parameter, prompting performs extraction and the storage of scattering parameter detection calibration that multidimensional condition maps and calibration data, until the calibration data configuration of whole test channel of comprising of Test Application and each basic composition unit thereof all completes;
Step (5): according to the concrete Test Application requirement of microwave Auto-Test System, when calibration data configuration all completes, carry out the Test Application of microwave Auto-Test System, and carry out error correction in real time according to calibration data, to obtain the higher test result of test accuracy.
Alternatively, in described step (1), system each test channel basic composition unit comprises the microwave component realized in program control system configuration each testing tool equipment and each test channel, and carries out linking correspondence configuration that is program control and calibration data file to each basic composition unit by visualized graph interface guide.
Alternatively, in described step (3), multidimensional condition mapped the calibration data of scattering parameter and system each test channel basic composition unit by the prompting of visualized graph interface guide and realize correspondingly linking and calling configuration.
Alternatively, in described step (4), control by the prompting of visualized graph interface guide vector network analyzer carries out scattering parameter under multidimensional cond calibration testing to system each test channel basic composition unit, extract multidimensional condition and map the calibration data of scattering parameter and carry out file designation, store and management with the form of " basic composition unit+multidimensional condition+scattering parameter ".
Alternatively, in described step (5), each test channel constructed by Test Application and each basic composition unit multidimensional condition thereof map the calibration data of scattering parameter, according to multi-dimensional matrix Cascade algorithms, the systematic error of test channel is removed in test result, to obtain the higher result of test accuracy.
Alternatively, mapping the calibration data of scattering parameter by the basic composition unit multidimensional condition of each test channel, to realize the multi-dimensional matrix Cascade algorithms of systematic features as follows:
Wherein, n (n >=2) represents the ordinal number of multidimensional cascade matrix afterbody, and N (N >=2) represents the cascade progression of multidimensional cascade matrix, and multidimensional condition is power, frequency, environmental baseline.
Alternatively, the transmission parameter in the equivalent microwave network scattering parameter obtained by multi-dimensional matrix Cascade algorithms, the insertion loss of each test channel microwave Auto-Test System automatically built in test process extracts and carries out test error correction.
Alternatively, reflection/transmission parameter in the equivalent microwave network scattering parameter obtained by multi-dimensional matrix Cascade algorithms, microwave Auto-Test System is extracted at the parameter characteristic of each test channel of the Excitation and response end of tested object in test process, again carrying out cascaded operational in conjunction with testing the scattering parameter result obtained, realizing the error correction to test result.
The invention has the beneficial effects as follows:
Without the need to carrying out the online detection calibration of original position specially when Test Application, the flexible combination configuration of many test channel can be carried out for different Test Application, and the undistorted transmission of test accuracy under different test mode is realized by calibration algorithm of the present invention, in unitized mode, meet the technical requirement that microwave Auto-Test System proposes detection calibration for adaption demand in actual Test Application to greatest extent.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the process flow diagram of the microwave Calibration Method for ATS that the present invention is based on scattering parameter cascade.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, the microwave Calibration Method for ATS based on scattering parameter cascade of the present invention, graphic based interface, visual, can flexible combination configuration wizard-like man-machine interaction steer mode, comprise the following steps:
Step 1: according to the embody rule state of microwave Auto-Test System, determines to calibrate and test the whole test channel and each basic composition unit thereof that comprise, and carries out with this calibration data configuration that corresponding multidimensional condition maps scattering parameter.
Step 2: according to the concrete Test Application configuration information of microwave Auto-Test System, control system configures each testing tool equipment and carries out self calibration.
Step 3: according to the concrete Test Application configuration information of microwave Auto-Test System, each basic composition unit existing multidimensional condition being mapped to scattering parameter calibration data carries out calling and configuration of calibration data.
Step 4: according to the concrete Test Application configuration of microwave Auto-Test System, to the system each test channel basic composition unit not having multidimensional condition to map the calibration data of scattering parameter, prompting performs extraction and the storage of scattering parameter detection calibration that multidimensional condition maps and calibration data, until the calibration data configuration of whole test channel of comprising of Test Application and each basic composition unit thereof all completes.
Based on above-mentioned steps, calibration data information acquisition belongs to general character work, can store respective alignment data file according to different conditions, repeatedly can call and uses and carry out specially when Test Application without the need to the online detection calibration of such as original position.
Step 5: according to the concrete Test Application requirement of microwave Auto-Test System, when calibration data configuration all completes, carry out the Test Application of microwave Auto-Test System, and carry out error correction in real time according to calibration data, to obtain the higher test result of test accuracy.
In above-mentioned steps 1, system each test channel basic composition unit comprises and can realize as microwave components such as RF/Microwave cable, switching channels, RF/Microwave breakout boxs in program control system configuration each testing tool equipment and each test channel, and can carry out linking correspondence configuration that is program control and calibration data file to each basic composition unit by visualized graph interface guide.
In above-mentioned steps 2, configure each testing tool equipment by visualized graph interface guide control system to hint and carry out self calibration.
In above-mentioned steps 3, multidimensional condition mapped the calibration data of scattering parameter and system each test channel basic composition unit by the prompting of visualized graph interface guide and realize correspondingly linking and calling configuration.
In above-mentioned steps 4, vector network analyzer carries out scattering parameter under multidimensional cond calibration testing to system each test channel basic composition unit is controlled by the prompting of visualized graph interface guide, extract multidimensional condition map the calibration data of scattering parameter and carry out file designation, store and management with the form of " basic composition unit (title)+multidimensional condition (title)+scattering parameter (bidirectional reflectance/transmission parameter, real part, imaginary data information) ".
In above-mentioned steps 5, each test channel constructed by Test Application and each basic composition unit multidimensional condition thereof map the calibration data of scattering parameter, according to multi-dimensional matrix Cascade algorithms, the systematic error of test channel is removed in test result, to obtain the higher result of test accuracy.
In calibration steps of the present invention, the multi-dimensional matrix Cascade algorithms being realized systematic features by the calibration data of the basic composition unit multidimensional condition mapping scattering parameter of each test channel is as follows:
Wherein, n (n >=2) represents the ordinal number of multidimensional cascade matrix afterbody, and N (N >=2) represents the cascade progression of multidimensional cascade matrix, and multidimensional condition is power, frequency, environmental baseline etc.
Transmission parameter in the equivalent microwave network scattering parameter obtained by multi-dimensional matrix Cascade algorithms, the insertion loss (systematic error) of each test channel that microwave Auto-Test System automatically can be built in test process extracts and carries out test error correction.
Reflection/transmission parameter in the equivalent microwave network scattering parameter obtained by multi-dimensional matrix Cascade algorithms, microwave Auto-Test System can be extracted at the parameter characteristic of each test channel of the Excitation and response end of tested object in test process, again carrying out cascaded operational in conjunction with testing the scattering parameter result obtained, just can realize the error correction to test result.
Adopt calibration steps provided by the invention, can effectively solve because the reasons such as test channel complexity and unconventional requirement cause separate unit testing tool cannot realize calibration in automatic testing process, or calibration effect cannot meet the technical barrier of Test Application requirement.
Adopt calibration steps provided by the invention, microwave Auto-Test System when Test Application without the need to carrying out the online detection calibration of original position, as long as the multidimensional condition obtaining each test channel basic composition unit maps the information of scattering parameter, the undistorted transmission of test accuracy just can be obtained by calibration computing, the impact produced due to the undesirable property by calibration testing process is relatively little, and therefore test accuracy is relatively high.
Adopt calibration steps provided by the invention, complete the calibration testing under each test channel basic composition unit multidimensional cond before only need testing and preserve the corresponding scattering parameter data message mapped, as long as each test channel state does not change, different Test Application only need call corresponding calibration data information according to combination and without the need to calibrating again, consuming time short, efficiency is high.
Adopt calibration steps provided by the invention, when test channel composition location mode changes, only need map scattering parameter to the multidimensional condition of the component units changed carry out calibration testing and preserve respective alignment data message, and without the need to calibrating and error correction the corresponding test channel related to, system effective utilization is high.
Adopt calibration steps provided by the invention, can realize the many test channel of visual flexible combination configuration-system and build the General Platform with calibration computing, can make microwave Auto-Test System in actual Test Application for adapting to different demand provides identical high-effect, pin-point accuracy, multiparameter, multi-functional automatic test capability.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. based on a microwave Calibration Method for ATS for scattering parameter cascade, it is characterized in that, based on visualized graph interface wizard-like man-machine interaction steer mode, comprise the following steps:
Step (1): according to the concrete Test Application state of microwave Auto-Test System, determine to calibrate and test the whole test channel and each basic composition unit thereof that comprise, and carry out with this calibration data configuration that corresponding multidimensional condition maps scattering parameter;
Step (2): according to the concrete Test Application configuration information of microwave Auto-Test System, control system configures each testing tool equipment and carries out self calibration;
Step (3): according to the concrete Test Application configuration information of microwave Auto-Test System, each basic composition unit existing multidimensional condition being mapped to scattering parameter calibration data carries out calling and configuration of calibration data;
Step (4): according to the concrete Test Application configuration information of microwave Auto-Test System, to the system each test channel basic composition unit not having multidimensional condition to map the calibration data of scattering parameter, prompting performs extraction and the storage of scattering parameter detection calibration that multidimensional condition maps and calibration data, until the calibration data configuration of whole test channel of comprising of Test Application and each basic composition unit thereof all completes;
Step (5): according to the concrete Test Application requirement of microwave Auto-Test System, when calibration data configuration all completes, carry out the Test Application of microwave Auto-Test System, and carry out error correction in real time according to calibration data, to obtain the higher test result of test accuracy.
2. as claimed in claim 1 based on the microwave Calibration Method for ATS of scattering parameter cascade, it is characterized in that, in described step (1), system each test channel basic composition unit comprises the microwave component realized in program control system configuration each testing tool equipment and each test channel, and carries out linking correspondence configuration that is program control and calibration data file to each basic composition unit by visualized graph interface guide.
3. as claimed in claim 1 based on the microwave Calibration Method for ATS of scattering parameter cascade, it is characterized in that, in described step (3), multidimensional condition mapped the calibration data of scattering parameter and system each test channel basic composition unit by the prompting of visualized graph interface guide and realize correspondingly linking and calling configuration.
4. as claimed in claim 1 based on the microwave Calibration Method for ATS of scattering parameter cascade, it is characterized in that, in described step (4), control by the prompting of visualized graph interface guide vector network analyzer carries out scattering parameter under multidimensional cond calibration testing to system each test channel basic composition unit, extract multidimensional condition and map the calibration data of scattering parameter and carry out file designation, store and management with the form of " basic composition unit+multidimensional condition+scattering parameter ".
5. as claimed in claim 1 based on the microwave Calibration Method for ATS of scattering parameter cascade, it is characterized in that, in described step (5), each test channel constructed by Test Application and each basic composition unit multidimensional condition thereof map the calibration data of scattering parameter, according to multi-dimensional matrix Cascade algorithms, the systematic error of test channel is removed in test result, to obtain the higher result of test accuracy.
6. as claimed in claim 5 based on the microwave Calibration Method for ATS of scattering parameter cascade, it is characterized in that, the multi-dimensional matrix Cascade algorithms being realized systematic features by the calibration data of the basic composition unit multidimensional condition mapping scattering parameter of each test channel is as follows:
Wherein, n (n >=2) represents the ordinal number of multidimensional cascade matrix afterbody, and N (N >=2) represents the cascade progression of multidimensional cascade matrix, and multidimensional condition is power, frequency, environmental baseline.
7. as claimed in claim 6 based on the microwave Calibration Method for ATS of scattering parameter cascade, it is characterized in that, transmission parameter in the equivalent microwave network scattering parameter obtained by multi-dimensional matrix Cascade algorithms, the insertion loss of each test channel microwave Auto-Test System automatically built in test process extracts and carries out test error correction.
8. as claimed in claim 6 based on the microwave Calibration Method for ATS of scattering parameter cascade, it is characterized in that, reflection/transmission parameter in the equivalent microwave network scattering parameter obtained by multi-dimensional matrix Cascade algorithms, microwave Auto-Test System is extracted at the parameter characteristic of each test channel of the Excitation and response end of tested object in test process, again carrying out cascaded operational in conjunction with testing the scattering parameter result obtained, realizing the error correction to test result.
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