CN112904831A - System for be used for showing time delay characteristic test of accuse system - Google Patents
System for be used for showing time delay characteristic test of accuse system Download PDFInfo
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
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Abstract
The invention discloses a system for testing delay characteristics of a display control system, which relates to the technical field of test verification platforms, and comprises a master control module, a time synchronization module, an image acquisition module, a bus data acquisition module, a data storage module and a delay characteristic analysis module, wherein the system has the beneficial effects that: the invention realizes the test and analysis of performance indexes such as network delay, response delay, bandwidth utilization rate and the like of the display and control system by matching the modules and utilizing a set of built test system software and hardware environment, evaluates whether the performance indexes meet the system design requirement and performance requirement by analyzing the test result, and provides a whole set of software and hardware solution for the integrated verification test of the display and control system by applying the test and verification platform, thereby solving the testability problem of the delay characteristic of the display and control system and greatly improving the comprehensive verification progress of the system and the correctness and completeness of the performance test.
Description
Technical Field
The invention relates to the technical field of test and verification platforms, in particular to a system for testing delay characteristics of a display control system.
Background
The display control system is an important component of an aircraft avionics system. The display device is responsible for interactive data of all other systems on the receiver and directly displaying the interactive data to the crew members through the display device, so that the crew members can acquire data and states of all systems on the airplane in real time. And meanwhile, the display control system provides a control panel as input equipment of the crew member to perform operations such as switching of display pictures, data input and the like. The functional test is mainly to carry out product test according to product business requirements and product industry characteristics so as to ensure whether the product meets user requirements or not. The performance test is a process of applying pressure to a tested system in a certain test strategy in a certain specific mode, acquiring various performance indexes of the system, such as response time, operation efficiency, resource utilization rate and the like, and evaluating whether the system meets the performance requirements of users. The display and control system has numerous configuration items, complex functional cross-linking test, short system integration and verification time and heavy task, and can find problems in time only by having an effective integrated verification environment, accurately locate the reasons and quickly find reasonable solution measures. However, in the integrated verification process of the current display and control system, there is no available verification test environment for performance test, which makes it difficult to perform the integration and verification work on the performance of the display and control system, and affects the progress of the comprehensive verification of the system and the correctness and completeness of the performance test. The tested system of the display control system time characteristic test verification platform is a display control system true piece. The system has complex composition and very high functional requirements, and the whole development process must meet the international airworthiness requirements. In order to ensure that the safety of the product meets the requirements and the technical performance indexes meet the requirements, the system needs to test and verify the performance characteristics of the system, so that in the whole system development process, attention needs to be paid to realizing the functions expected by customers, and more importantly, the safety, reliability and stability of the realized functions need to be ensured. Based on the requirements of the system development process and the limitations of the existing test environment, it is increasingly important and urgent to build a set of environment for comprehensively displaying and controlling the time characteristic test and verification of the system, so that the system for displaying and controlling the time characteristic test of the system needs to be designed to solve the problems.
Disclosure of Invention
The present invention is directed to a system for testing delay characteristics of a display control system, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a system for testing the delay characteristic of a display control system comprises the following contents: the system comprises a master control module, a time synchronization module, an image acquisition module, a bus data acquisition module, a data storage module and a delay characteristic analysis module;
the master control module is used for carrying out overall coordination and control on other modules in the system;
the time synchronization module is used for providing time synchronization information for other modules in the system;
the image acquisition module is used for shooting a display picture of the tested display control system and sending the shot picture to the data storage module;
the bus data acquisition module is used for acquiring bus data of each monitoring point of the display and control system to be tested and sending the acquired data to the data storage module; the bus data acquisition module is accessed to the tested display control system in a non-invasive mode;
the data storage module is used for receiving and storing various data acquired by the data acquisition module and the bus data acquisition module, and providing the data to the delay characteristic analysis module for subsequent analysis and processing;
the delay characteristic analysis module is used for analyzing and processing the image data and the bus data stored in the data storage module and outputting a delay characteristic test result of the tested display and control system.
Preferably, the master control module, the time synchronization module, the image acquisition module, the bus data acquisition module, the data storage module and the delay characteristic analysis module are operated on a plurality of computers in a distributed deployment mode according to load and function categories;
preferably, the time synchronization module adopts an IRIG-B protocol as a time synchronization standard, comprises a GPS antenna, a time service card and an IRIG-B code distributor, and provides microsecond-level time synchronization precision;
preferably, the image acquisition module system comprises a lens, a high-speed camera, a disk array and an image processor, and can achieve the shooting speed of 1000 frames per second.
Preferably, the bus data acquisition module supports access to a discrete quantity board card, an ARINC825 board card, an ARINC429 board card, an ARINC664 board card and other various board cards, and the accessed board cards all support a hardware timestamp marking function.
Preferably, the data storage module supports large-scale image storage and bus data storage functions.
Preferably, the delay characteristic analysis module applies an image analysis technology and a data frame identification technology, and can accurately track and identify the characteristic value of each monitoring point of the tested display and control system, so as to analyze and process the delay characteristic of the tested display and control system. The delay characteristic analysis module comprises the following steps:
s1, before analysis starts, a user marks a characteristic value on a data frame structure of a first monitoring point, and selects an initial time t 0;
s2, the time delay characteristic analysis module screens out data frames and image frames of a certain data volume, which are acquired from t0 by each monitoring point, from the data storage module, and the data frames and the image frames are arranged according to the ascending order of acquisition time;
s3, the delay characteristic analysis module carries out characteristic matching at the first monitoring point according to the characteristic value to find out an initial data frame;
s4, the delay characteristic analysis module performs characteristic matching on all subsequent monitoring points according to the characteristic values to find out associated data frames;
s5, the delay characteristic analysis module performs characteristic matching on the shot image frames according to the characteristic values to find out related image frames;
and S6, the delay characteristic analysis module analyzes and processes the delay characteristic according to the initial data frame, the associated data frame and the associated image frame, and outputs a delay characteristic analysis result.
Compared with the prior art, the invention has the beneficial effects that: the invention realizes the test and analysis of performance indexes such as network delay, response delay, bandwidth utilization rate and the like of the display control system by building a set of test system hardware environment through the matching use of the processes, realizes the test and verification of the display control system picture synchronization by using high-speed camera equipment and image analysis software, and evaluates whether a set of verification platform meeting the design requirements and performance requirements of the system or not by analyzing the test result.
Drawings
FIG. 1 is an overall framework diagram of the system of the present invention;
FIG. 2 is a block diagram of a system deployment of the present invention;
FIG. 3 is a diagram of an original database table structure of the present invention;
FIG. 4 is a database table structure of data frames according to the present invention;
FIG. 5 is a table structure of image frame database according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a system for testing the delay characteristic of a display control system comprises the following contents: the system comprises a master control module, a time synchronization module, an image acquisition module, a bus data acquisition module, a data storage module and a delay characteristic analysis module;
the master control module is used for carrying out overall coordination and control on other modules in the system;
the time synchronization module is used for providing time synchronization information for other modules in the system;
the image acquisition module is used for shooting a display picture of the tested display control system and sending the shot picture to the data storage module;
the bus data acquisition module is used for acquiring bus data of each monitoring point of the display and control system to be tested and sending the acquired data to the data storage module;
the data storage module is used for receiving and storing various data acquired by the data acquisition module and the bus data acquisition module, and providing the data to the delay characteristic analysis module for subsequent analysis and processing;
the delay characteristic analysis module is used for analyzing and processing the image data and the bus data stored in the data storage module and outputting a delay characteristic test result of the tested display and control system.
Above the operation of the master control module and the PC, the delay characteristic analysis module, the data storage module, the bus data acquisition module, and the image acquisition module respectively operate on independent high-performance workstations, and the modules exchange data through a high-speed ethernet, as shown in fig. 2.
The time synchronization module completes time synchronization of signal acquisition of the whole system, ensures that all data acquisition is completed under a time reference, adopts an IRIG-B protocol as a time synchronization standard, and comprises a GPS antenna, a time service card and an IRIG-B code distributor, as shown in FIG. 2.
The image acquisition module system comprises a lens, a high-speed camera, a disk array and an image processor, mainly realizes image shooting and image storage, and provides a data delay characteristic analysis module for image analysis processing.
The bus data acquisition module mainly realizes Arinc825 data acquisition monitoring, Arinc664 data acquisition, TAP functions, Arinc429 data acquisition and discrete quantity data acquisition.
The data storage module is used for storing the bus data acquired by the bus data acquisition module and the image data acquired by the image acquisition module and providing an interface for inquiring and analyzing the delay characteristic analysis module. The data storage module is realized by adopting a MySQL database and comprises an original database, a data frame database and an image frame database. The structure of the original database table is shown in fig. 3, the structure of the data frame database table is shown in fig. 4, and the structure of the image frame database table is shown in fig. 5.
Wherein, the delay characteristic analysis module comprises the following steps:
s1, before analysis starts, a user marks a characteristic value on a data frame structure of a first monitoring point, and selects an initial time t 0;
s2, the time delay characteristic analysis module screens out data frames and image frames of a certain data volume, which are acquired from t0 by each monitoring point, from the data storage module, and the data frames and the image frames are arranged according to the ascending order of acquisition time;
s3, the delay characteristic analysis module carries out characteristic matching at the first monitoring point according to the characteristic value to find out an initial data frame;
s4, the delay characteristic analysis module performs characteristic matching on all subsequent monitoring points according to the characteristic values to find out associated data frames;
s5, the delay characteristic analysis module performs characteristic matching on the shot image frames according to the characteristic values to find out related image frames;
and S6, the delay characteristic analysis module analyzes and processes the delay characteristic according to the initial data frame, the associated data frame and the associated image frame, and outputs a delay characteristic analysis result.
Wherein, the delay characteristic analysis module comprises a data frame identification method, which is described as follows:
A. the collected data frame is processed and enters an A664 information processing table, an A825 information processing table and an A429 information processing table.
And B, processing the information processing table by using the A664 as follows:
a) on the basis of the preliminary identification 664 of the data, it is first identified whether the data frame is native a664 data or whether the data conversion comes from a429, a 825.
b) If the data frame is A664 native data, the quintuple needs to be identified according to the frame, and the data frame information of the same data stream is identified. That is, whether the data frames are from the same data stream is identified through the UDP source port + IP source address + MAC destination address + UDP destination port + IP destination address in the data frames.
c) Then, the collected data frames are sequenced, and the first 5 sequenced frames (determined according to the number of collectors) are found out through SQL statements, and the 5 frames are the same frame data.
d) If the data frame is a429 converted into 664 data frame, it is necessary to match the corresponding a429 information frame in the a429 information processing table according to 664 data content, and backfill the corresponding a429 frame number into the "packing information number list".
e) The same processing as that of a429 is required if the data frame is a825 data.
C. After identifying the same frame a of bus data, the last step is to identify how the data frame matches the image change when the image change is made.
a) Firstly, determining the information of the data frame displayed in the interface area according to the image data frame mapping relation table, and finding the time stamp of the area change in a plurality of images according to an image matching algorithm.
b) And sequencing the time stamps to find the maximum value Tmax of the time of the same data frame collected on the bus.
c) Tmax is compared with the image change time stamp to find the time stamp of the first video time stamp > Tmax, and the image frame is the image information of the matched data frame A
D. Special case handling
a) ARINC664 lost frames: on the basis of identifying the same data frame of ARINC664, the SN numbers of the same data frame are compared, the same data frame with the same SN number is the same frame data, and if the SN numbers are different, the data frame has frame loss in the transmission process, the interference data with different SN numbers need to be removed.
b) ARINC429 frame loss: the ARINC429 configuration table configures the a429 message to contain the label number and how the a429 data words are assembled into one meaningful data message. After the data information is acquired on the data acquisition board card, the label information is configured according to the configuration table, and whether the received label number is lost or not is judged. For example, 3 labels are configured for one message, but only 2 messages are collected on the collection board, and then packet loss is determined.
c) ARINC825 frame loss: the ARINC825 configuration table configures each message, has a corresponding message ID mark and a message sending period, analyzes the message ID after the A825 board card collects data, and judges whether the message receiving time is separated from the last same message by one period, and if the separated period is more than one period, the data loss exists.
The time delay characteristic analysis module comprises an image frame difference identification method which is described as follows:
A. definition of
[ original frame ]: a still state captured picture frame prior to excitation;
[ change frame ]: a picture frame generated during a change of the picture frame caused by the excitation;
[ result frame ]: the static state after the change process of the picture frame caused by the excitation is finished is a result picture frame;
[ frame interval ]: a set of picture frames acquired by a high speed camera in a continuous time;
[ minimum excitation interval ]: minimum time interval of two continuous data excitations of the source;
[ previous frame ]: the image algorithm is used for comparing whether the two picture frames are the same or not with the previous frame;
[ later frame ]: the image algorithm is used for comparing whether the two picture frames are the same or not with each other;
[ frame interval ]: in order to increase the calculation speed and reduce the image recognition algorithm, the set frame interval can be replaced by a number to indicate the number of frames in the interval. The first frame of the frame interval is a preceding frame and the last frame is a following frame.
B. Image blocking
Dividing the picture into 100 small pictures, respectively calculating DCT changes, and taking the maximum change as the overall change rate of the image to record.
C. Simplified color
And the pictures are converted into gray level images, so that the calculation amount is simplified.
D. Calculating DCT (discrete cosine transform quantity)
DCT is to decompose the image into frequency aggregation and ladder shape, and calculate the integral difference value of the image according to the absolute value (mi-ni) of the difference of the gray scale value of each pixel in the previous frame and the next frame, so as to obtain the DCT. The formula is as follows:
T＝∑abs(mi-ni)
E. calculating the mean value
Dividing the total value of DCT by the picture area (S), calculating the mean value of DCT
F. Filtering DCT
Recording the DCT mean values of all the picture sequences, and performing mean value filtering on the DCT mean values to filter the jitter of the images. The formula is shown as follows, wherein xi is the mean value of DTCs of each picture, and (n-i) is the number of pictures.
G. Result acquisition
According to the DCT mean curve of the filtered picture sequence, the point when the curve starts to change is a change frame, and the point when the curve finishes changing is a result frame.
The invention realizes the test and analysis of performance indexes such as network delay, response delay, bandwidth utilization rate and the like of the display control system by building a set of test system software and hardware environment through the matching use of the flows, realizes the synchronous test and verification of display control pictures by utilizing high-speed camera equipment and image analysis software, and evaluates whether a set of verification platform meeting the design requirements and performance requirements of the system or not by analyzing the test result.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A system for testing the delay characteristic of a display control system is characterized by comprising the following contents: the system comprises a master control module, a time synchronization module, an image acquisition module, a bus data acquisition module, a data storage module and a delay characteristic analysis module;
the master control module is used for carrying out overall coordination and control on other modules in the system;
the time synchronization module is used for providing time synchronization information for other modules in the system;
the image acquisition module is used for shooting a display picture of the tested display control system and sending the shot picture to the data storage module;
the bus data acquisition module is used for acquiring bus data of each monitoring point of the display and control system to be tested and sending the acquired data to the data storage module;
the data storage module is used for receiving and storing various data acquired by the data acquisition module and the bus data acquisition module, and providing the data to the delay characteristic analysis module for subsequent analysis and processing;
the delay characteristic analysis module is used for analyzing and processing the image data and the bus data stored in the data storage module and outputting a delay characteristic test result of the tested display and control system.
2. The system for testing the delay characteristic of the display and control system according to claim 1, wherein: the master control module, the image acquisition module, the bus data acquisition module, the data storage module and the delay characteristic analysis module have a distributed deployment function, and each module can respectively run on different computers according to the characteristics of a system to be tested.
3. The system for testing the delay characteristic of the display and control system according to claim 1, wherein: the time synchronization module adopts an IRIG-B protocol as a time synchronization standard and comprises a GPS antenna, a time service card and an IRIG-B code distributor.
4. The system for testing the delay characteristic of the display and control system according to claim 1, wherein: the image acquisition module system comprises a lens, a high-speed camera, a disk array and an image processor.
5. The system for testing the delay characteristic of the display and control system according to claim 1, wherein: the bus data acquisition module supports access to a discrete quantity board card, an ARINC825 board card, an ARINC429 board card, an ARINC664 board card and other various board cards, and the accessed board cards need to support a hardware timestamp marking function.
6. The system for testing the delay characteristic of the display and control system according to claim 1, wherein: the data storage module supports large-scale image storage and bus data storage functions.
7. The system for testing the delay characteristic of the display and control system according to claim 1, wherein: the delay characteristic analysis module applies an image analysis technology and a data frame identification technology, can accurately track and identify the characteristic value of each monitoring point of the tested display and control system, and further analyzes and processes the delay characteristic of the tested display and control system. The delay characteristic analysis module comprises the following steps:
s1, before analysis starts, a user marks a characteristic value on a data frame structure of a first monitoring point, and selects an initial time t 0;
s2, the time delay characteristic analysis module screens out data frames and image frames of a certain data volume, which are acquired from t0 by each monitoring point, from the data storage module, and the data frames and the image frames are arranged according to the ascending order of acquisition time;
s3, the delay characteristic analysis module carries out characteristic matching at the first monitoring point according to the characteristic value to find out an initial data frame;
s4, the delay characteristic analysis module performs characteristic matching on all subsequent monitoring points according to the characteristic values to find out associated data frames;
s5, the delay characteristic analysis module performs characteristic matching on the shot image frames according to the characteristic values to find out related image frames;
and S6, the delay characteristic analysis module analyzes and processes the delay characteristic according to the initial data frame, the associated data frame and the associated image frame, and outputs a delay characteristic analysis result.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113595810A (en) * | 2021-06-17 | 2021-11-02 | 国网上海能源互联网研究院有限公司 | Interactive testing method and system suitable for power distribution network information |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113595810A (en) * | 2021-06-17 | 2021-11-02 | 国网上海能源互联网研究院有限公司 | Interactive testing method and system suitable for power distribution network information |
| CN113595810B (en) * | 2021-06-17 | 2023-09-26 | 国网上海能源互联网研究院有限公司 | Interactive testing method and system suitable for power distribution network information |
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