CN116449136A - Automatic test system for multi-channel input and output - Google Patents
Automatic test system for multi-channel input and output Download PDFInfo
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- CN116449136A CN116449136A CN202310458968.8A CN202310458968A CN116449136A CN 116449136 A CN116449136 A CN 116449136A CN 202310458968 A CN202310458968 A CN 202310458968A CN 116449136 A CN116449136 A CN 116449136A
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- 238000006243 chemical reaction Methods 0.000 claims description 16
- 238000012795 verification Methods 0.000 claims description 10
- 238000013507 mapping Methods 0.000 claims description 5
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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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]
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Abstract
The invention discloses an automatic testing system for multi-channel input and output, which relates to the technical field of automatic measurement control and comprises a transfer cabinet and a main cabinet, wherein the rear end of the transfer cabinet is connected with tested equipment through a signal line; the host in the main cabinet is connected with the corresponding slot phase on the transfer cabinet through the transfer line and the transfer board; the host controls the output of the IO board card based on the test requirement of the test flow configuration, so that the tested equipment outputs corresponding output signals according to given input, and obtains a test result based on the comparison of the output signals of the tested equipment and expected values in the test flow configuration. The invention can realize automatic test, has high test precision and saves time and labor.
Description
Technical Field
The invention relates to the technical field of automatic measurement control, in particular to an automatic test system for multi-channel input and output.
Background
When the control system with a plurality of measuring points, such as a nuclear power station and the like, the multichannel measurement and acquisition operation control device bears the functions of isolating, converting, calculating and acquiring most of key parameters, provides accurate and reliable signals for parameter display, data storage, operation control and protection, and needs to carry out strict and sufficient test before being used.
At present, a multi-channel measurement acquisition operation control device often needs to be matched by multiple persons in testing, all channels of the multi-channel measurement acquisition operation control device are sequentially subjected to analog signal Input by a manual operation signal source, meanwhile, signals are acquired and Output by tools such as a universal meter, and the multi-channel measurement acquisition operation control device often has thousands of IO (Input/Output) channels, so that the testing process of the device is extremely complicated, and a large amount of manpower and material resources are consumed. At present, the automatic testing device can not replace manual mode to complete the test, and the main reasons are as follows:
1. the number of IO channels of the equipment is large, and a large switching space and test resources are needed by adopting an automatic test mode, so that the problems of interference with the structure and the like are easily caused;
2. the equipment precision is higher, so that the precision requirement on the testing device is more severe, multichannel high-precision acquisition and output are difficult to realize, and the testing device is difficult to calibrate;
3. the automatic testing device is difficult to maintain, the maintenance cost is higher along with the increase of the service time, otherwise, the device cannot be used due to the increase of errors;
4. the high-precision resistor output mode is difficult;
5. manual testing suffers from the problem that the fault is inconvenient to diagnose, and the fault is difficult to remove.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an automatic test system for multi-channel input and output, which can realize automatic test, has high test precision and saves time and labor.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the rear end of the transfer cabinet is connected with the tested equipment through a signal wire;
the host in the main cabinet is connected with the corresponding slot phase on the transfer cabinet through the transfer line and the transfer plate;
the host controls the output of the IO board card based on the test requirement of the test flow configuration, so that the tested equipment outputs corresponding output signals according to given input, and obtains a test result based on the comparison of the output signals of the tested equipment and expected values in the test flow configuration.
On the basis of the technical proposal, the method comprises the following steps,
the automated testing system further comprises a display screen;
the display screen is connected with the host computer and used for displaying the test process and the test result and prompting the test process.
On the basis of the technical scheme, before the tested equipment is tested, the method further comprises the following steps:
based on the prompt of the testing process on the display screen, the connection between the tested equipment and the switching cabinet is carried out, and the host is connected with the corresponding slot position on the switching cabinet.
On the basis of the technical proposal, the method comprises the following steps,
the host is also provided with software for configuring the test flow and the test parameters;
after the test table and the NI card wiring mapping table are imported into the automatic test system according to the inspection acceptance rule of the tested equipment, if the test flow and the test parameters are changed, the test flow and the test parameters are adjusted through software.
Based on the technical scheme, when the tested equipment is tested, only part of channels recorded in the test table are tested at a time, and after the current test is finished, the groove position of the host connected to the transfer cabinet is replaced to test other part of channels.
Based on the above technical solution, the host controls the output of the IO board card based on the test requirement configured by the test flow, so that the tested device outputs a corresponding output signal according to the given input, and specifically includes:
based on interface control on the display screen, determining that the test flow starts;
reading the test flow configuration through software, controlling the output of the IO board card through a PXI bus by a controller of a host, and providing required input signals for tested equipment according to the requirement;
the device under test outputs a corresponding output signal according to a given input signal.
Based on the above technical solution, the obtaining a test result based on the comparison between the output signal of the tested device and the expected value in the test flow configuration specifically includes:
and comparing the output signal of the tested equipment with an expected value in test flow configuration according to the set check logic of the tested equipment so as to realize the matching of the correctness of the output signal and obtain a test result.
On the basis of the technical proposal, the method comprises the following steps,
when the function of the tested equipment is correct and the conversion precision meets the technical index requirement, the tested equipment is proved to be qualified in verification, and a verification record is displayed on a display screen;
and when the function incorrect activity conversion precision of the tested equipment exceeds the standard, the tested equipment is proved to be unqualified.
On the basis of the technical proposal, the method comprises the following steps,
the automated test system further comprises a signal conversion circuit;
the signal conversion circuit is used for converting the output signal of the tested equipment into a standard signal to be provided for a host when the input and output signal of the tested equipment is not matched with the input and output signal of the IO board card.
On the basis of the technical scheme, before the tested equipment is tested, the automatic test system performs self-test, and if the self-test is qualified, the tested equipment starts to be tested.
Compared with the prior art, the invention has the advantages that: the input signals of different types are accessed from the input end of the tested equipment, the output of the tested equipment is acquired through the acquisition card, the test data are stored and displayed, and the result is subjected to comparative analysis and recording, so that the automatic test is realized, the test precision is high, and the time and the labor are saved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a multi-channel I/O automated test system according to an embodiment of the present invention;
FIG. 2 is a flow chart of the automated test system of the present invention.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments.
Referring to fig. 1, the embodiment of the invention provides a multi-channel input/output automatic test system, which is realized based on a PXI (PCI extensions for Instrumentation, PCI expansion for instrument systems) bus, namely, the automatic test system of the invention develops an automatic test system based on a virtual instrument test technology based on a PXI bus aiming at the characteristics of the tested equipment on the basis of a mature test system integration technology. By adopting the advanced PXI bus integration technology, powerful test software is operated, and the test of each performance index of the equipment can be automatically completed. The automatic test system of the invention follows the principles of serialization, generalization and modularization, and is convenient for maintenance and upgrading.
Specifically, the automatic test system comprises a transfer cabinet, a main cabinet and a display screen. The rear end of the transfer cabinet is connected with the tested equipment through a signal wire; the host in the main cabinet is connected with the corresponding slot phase on the transfer cabinet through the transfer line and the transfer board; the host controls the output of the IO board card based on the test requirement of the test flow configuration, so that the tested equipment outputs corresponding output signals according to given input, and obtains a test result based on the comparison of the output signals of the tested equipment and expected values in the test flow configuration.
In the actual application process, a certain test flow of the tested device may be as follows:
(1) Performing test flow configuration, controlling the output of the IO board card according to the test requirement, feeding back corresponding current and switching value signals by the tested equipment according to the given output, and correspondingly changing the parameter values of the CAN (Controller Area Network, a controller area network) and the network;
(2) After the current and switching value signals fed back by the tested equipment are obtained through the IO acquisition board card, the software compares the obtained signals with expected values of the test flow configuration, meanwhile, the main cabinet analyzes CAN and network data to obtain parameter values corresponding to the test, and then the parameter values are compared with the expected values to complete the first-step test;
(3) Then the software gives a line changing operation prompt, and the steps (1) and (2) are repeated after line changing according to the prompt;
(4) And obtaining the test result of the round after completing all the steps of the test flow.
In the invention, the display screen is connected with the host computer and is used for displaying the test process and the test result and prompting the test process. Before testing the tested equipment, the method further comprises the following steps: based on the prompt of the testing process on the display screen, the connection between the tested equipment and the switching cabinet is carried out, and the host is connected with the corresponding slot position on the switching cabinet.
In the invention, the host is also provided with software for configuring the test flow and the test parameters; after the test table and the wiring mapping table of the NI card (a data acquisition card) are imported into the automatic test system according to the inspection acceptance rule of the tested equipment, if the test flow and the test parameters are changed, the test flow and the test parameters are adjusted through software. When the tested equipment is tested, only part of channels recorded in the test table are tested at a time, and after the current test is finished, the groove position of the host connected to the transfer cabinet is replaced, so that the test of other part of channels is performed.
And reading the test result through the acquisition board card, storing and analyzing the test result, determining an acquisition data error, judging the result qualification according to the acceptance rule, and finally storing the test result and supporting the inquiry of the check result. In the case of an external printer, the verification result may be printed. The time required for manual recording of the data is subtracted. Furthermore, the schematic diagram of the equipment and the wiring diagram are integrated in an automatic test system, and the schematic diagram and the wiring relation of abnormal positions or parameters can be automatically called when abnormal test results are encountered, so that the fault is conveniently detected, the fault diagnosis function is realized, and the difficulty of manually diagnosing the fault is overcome.
The automatic test system CAN access the type signals such as resistance, current, voltage, switching value and the like from the input end of the tested equipment, collect current output through the collecting card, read test result data sent on the CAN and the Ethernet, store and display the test data, and compare, analyze and record the results.
The automatic test system can automatically judge whether the function of the tested equipment is correct, whether the conversion precision meets the technical index requirement, and display the data of the verification process and the verification conclusion on the display screen. In the process of automatic verification, a user can carry out the following operations according to prompts on a display screen: connecting an interface for current output and current collection to a designated position according to the prompt; inserting the aviation plug of the test line into a designated position according to the prompt, and the like. When the check conclusion of the tested equipment (or plug-in) is unqualified, the test system can automatically complete the judgment and perform the striking identification. The test result is clear, the observation is convenient, the searching and the comparison are convenient through completing the data storage, and the state of each period of the equipment is convenient to record.
In the invention, before the tested equipment is tested, the automatic test system performs self-test, and if the self-test is qualified, the tested equipment is tested, so that the accuracy of the test is improved.
In the invention, a host controls the output of an IO board card based on the test requirement configured by a test flow, so that tested equipment outputs corresponding output signals according to given input, and the method specifically comprises the following steps:
a: based on interface control on the display screen, determining that the test flow starts;
b: reading the test flow configuration through software, controlling the output of the IO board card through a PXI bus by a controller of a host, and providing required input signals for tested equipment according to the requirement;
c: the device under test outputs a corresponding output signal according to a given input signal.
In the invention, based on the comparison of the output signal of the tested equipment and the expected value in the test flow configuration, the test result is obtained, which comprises the following steps: and comparing the output signal of the tested equipment with an expected value in test flow configuration according to the set check logic of the tested equipment so as to realize the matching of the correctness of the output signal and obtain a test result.
In the invention, when the function of the tested equipment is correct and the conversion precision meets the technical index requirement, the tested equipment is proved to be qualified in verification, and a verification record is displayed on a display screen; and when the function incorrect activity conversion precision of the tested equipment exceeds the standard, the tested equipment is proved to be unqualified.
The automated test system can skip part of the test flow through software configuration to realize targeted step-by-step debugging. The automatic test system realizes the self-loop test through the cooperation of the acquisition card and the output card, thereby realizing the self-checking function.
Carrying out configuration management on current output, current acquisition, voltage output, switching value output and switching value acquisition channels used in the test, wherein the current output channels are configured in a mapping manner with real equipment channels according to AO1 and AO2 …; similarly, current collection is according to AI1, AI2 …, voltage output is according to VO1, VO2 …, switching value output is according to DO1, DO2 …, and switching value collection is according to DI1, DI2 …. When the step of automatic analysis and generation of the imported form is carried out, the channel configuration used is associated according to the mapping, so that the device channel can be configured. And the automatic test process synchronously stores the result in the EXCEL file, so that the test result can be conveniently stored and exported.
When the test task is carried out, the signal wire of the tested equipment is connected to the rear part of the transfer cabinet, and meanwhile, the host is connected to the corresponding slot position of the transfer cabinet in the host cabinet through the transfer wire and the transfer plate. Because the number of the test channels is limited, only one part of the table is tested at a time, and after the test task of the part is completed, the slot position of the host connected to the transfer cabinet is replaced and then the next test task is performed. A specific workflow diagram of the automated test system of the present invention is shown in fig. 2.
A: starting the test, and determining that the test flow starts based on interface control on the display screen;
b: software reads the test flow configuration;
c: inputting parameters, wherein a controller of a host controls the output of an IO board card through a PXI bus, and provides required input signals for tested equipment according to requirements;
d: controlling the output of the tested equipment;
e: measuring and collecting, namely collecting the output of the tested equipment through a collecting card, providing the output to a host, and simultaneously analyzing CAN and network data by the host;
f: acquiring display data of a display;
g: displaying a single test result, and comparing an output signal of the tested equipment with an expected value in test flow configuration according to set check logic of the tested equipment so as to realize the matching of the correctness of the output signal and obtain a test result;
h: collecting test results;
i: judging whether the test is finished, if not, turning to the step C, if so, turning to the step J;
j: ending the test.
In the invention, the automatic test system also comprises a signal conversion circuit; the signal conversion circuit is used for converting the output signal of the tested equipment into a standard signal to be provided for a host when the input and output signal of the tested equipment is not matched with the input and output signal of the IO board card.
That is, because the input and output signals of the tested device are not matched with the input and output signals of the board, a signal conversion circuit is needed for conversion. The signal conversion circuit converts the signal output by the tested equipment into standard voltage and provides the standard voltage for the system, and other standard input and output signals are directly connected with the board card.
In order to complete the self-checking function of the system input/output board card, the output and input channels of the board card are connected to form a loop, and the current output is connected with the current acquisition channel. The system collects inputs while controlling outputs. When the output and the input are matched, the self-inspection is qualified, so that the function of the input/output board card can be comprehensively inspected.
According to the multi-channel input and output automatic test system, different types of input signals are accessed from the input end of the tested equipment, the output of the tested equipment is collected through the collection card, test data are stored and displayed, and the results are compared, analyzed and recorded, so that automatic test is realized, the test precision is high, and time and labor are saved.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
It should be noted that in this application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An automated testing system for multi-channel input and output, the automated testing system being implemented based on a PXI bus, the automated testing system comprising:
the rear end of the transfer cabinet is connected with the tested equipment through a signal wire;
the host in the main cabinet is connected with the corresponding slot phase on the transfer cabinet through the transfer line and the transfer plate;
the host controls the output of the IO board card based on the test requirement of the test flow configuration, so that the tested equipment outputs corresponding output signals according to given input, and obtains a test result based on the comparison of the output signals of the tested equipment and expected values in the test flow configuration.
2. An automated testing system for multiple pass input and output as defined in claim 1, wherein:
the automated testing system further comprises a display screen;
the display screen is connected with the host computer and used for displaying the test process and the test result and prompting the test process.
3. An automated multi-channel input-output test system according to claim 2, further comprising, prior to testing the device under test:
based on the prompt of the testing process on the display screen, the connection between the tested equipment and the switching cabinet is carried out, and the host is connected with the corresponding slot position on the switching cabinet.
4. An automated testing system for multiple pass input and output as defined in claim 2, wherein:
the host is also provided with software for configuring the test flow and the test parameters;
after the test table and the NI card wiring mapping table are imported into the automatic test system according to the inspection acceptance rule of the tested equipment, if the test flow and the test parameters are changed, the test flow and the test parameters are adjusted through software.
5. An automated multi-channel input-output test system according to claim 4 and wherein: when the tested equipment is tested, only part of channels recorded in the test table are tested at a time, and after the current test is finished, the groove position of the host connected to the transfer cabinet is replaced, so that the test of other part of channels is performed.
6. The automated testing system of claim 4, wherein the host controls the IO board output based on the test requirements of the test flow configuration to enable the device under test to output corresponding output signals according to the given inputs, and specifically comprises:
based on interface control on the display screen, determining that the test flow starts;
reading the test flow configuration through software, controlling the output of the IO board card through a PXI bus by a controller of a host, and providing required input signals for tested equipment according to the requirement;
the device under test outputs a corresponding output signal according to a given input signal.
7. The automated testing system of claim 6, wherein the obtaining the test result based on a comparison of the output signal of the device under test and the expected value in the test flow configuration, specifically comprises:
and comparing the output signal of the tested equipment with an expected value in test flow configuration according to the set check logic of the tested equipment so as to realize the matching of the correctness of the output signal and obtain a test result.
8. An automated multi-channel input-output test system according to claim 7, wherein:
when the function of the tested equipment is correct and the conversion precision meets the technical index requirement, the tested equipment is proved to be qualified in verification, and a verification record is displayed on a display screen;
and when the function incorrect activity conversion precision of the tested equipment exceeds the standard, the tested equipment is proved to be unqualified.
9. An automated testing system for multiple pass input and output as defined in claim 1, wherein:
the automated test system further comprises a signal conversion circuit;
the signal conversion circuit is used for converting the output signal of the tested equipment into a standard signal to be provided for a host when the input and output signal of the tested equipment is not matched with the input and output signal of the IO board card.
10. An automated testing system for multiple pass input and output as defined in claim 1, wherein: before the tested equipment is tested, the automatic testing system performs self-checking, and if the self-checking is qualified, the tested equipment starts to be tested.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310458968.8A CN116449136A (en) | 2023-04-21 | 2023-04-21 | Automatic test system for multi-channel input and output |
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| CN202310458968.8A CN116449136A (en) | 2023-04-21 | 2023-04-21 | Automatic test system for multi-channel input and output |
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| CN202310458968.8A Pending CN116449136A (en) | 2023-04-21 | 2023-04-21 | Automatic test system for multi-channel input and output |
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