CN112027111A - Real-time acquisition and display method and system for aircraft bus data - Google Patents
Real-time acquisition and display method and system for aircraft bus data Download PDFInfo
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Abstract
The invention relates to a real-time acquisition and display method and system for aircraft bus data, and belongs to the technical field of data acquisition and display. The invention designs a data analysis and display interface, completes real-time acquisition and analysis of GJB289A and RS422 bus data through modularization and layering design, and displays the content of each data block in a form of actual physical significance. The method can finish real-time acquisition and display of data of different airplane systems by modifying the dynamic link library, can greatly improve the test efficiency, and provides an important means for system joint test and troubleshooting.
Description
Technical Field
The invention belongs to the technical field of data acquisition and display, and particularly relates to a real-time acquisition and display method and system for aircraft bus data.
Background
At present, with the continuous iterative development of an airborne avionics system, the cross-linking relationship among systems and equipment is increasingly complex, and the collection and monitoring of bus data become more important. In the avionics laboratory combined test or ground test, in order to obtain relevant test data or analyze positioning problems, the following two methods are mainly adopted at present:
1. and after the test is finished, unloading the data stored by the airborne data acquisition recorder, and analyzing, screening and analyzing the recorded data. The method needs to perform the operations of power failure and data copying after the test every time, and if the test needs to be performed for multiple times, the operation of power on and power off needs to be performed repeatedly, the data analysis is not real-time and visual, and the working efficiency is low.
2. An external bus monitor is adopted to monitor bus data such as GJB289A and RS422 in real time, and relevant data of a concerned system or equipment is checked for real-time analysis. Although data is acquired in real time, data display is in a binary format, data conversion is required according to a related interface control file to obtain a required result, frame header check sum and other screening work is required for RS422 data, and if more data elements are to be analyzed, a large amount of time is required, and errors are prone to occurring.
In order to quickly and effectively acquire related test data to assist test analysis work during an avionic laboratory combined test or a ground test, an airplane bus data real-time acquisition and display method and system need to be designed.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: how to design a method and a system for acquiring and displaying aircraft bus data in real time to make up for the defects of the existing aircraft data real-time acquisition and display means and quickly and effectively acquire related test data.
(II) technical scheme
In order to solve the technical problem, the invention provides a design method of an airplane bus data real-time acquisition and display system, which is provided with a GJB289A interface, an RS422 interface and a discrete magnitude interface, wherein the GJB289A interface is accessed to a GJB289A bus of an airplane system through a switching cable, and the RS422 interface and the discrete magnitude interface are connected with a switching three-way cable to acquire data information accessed to the system in real time.
Preferably, the system is designed for performing real-time data acquisition, analysis and real-time display functions, and comprises: a computer module, three GJB289A bus communication modules, an RS422 communication and discrete quantity control module;
the computer module runs a Windows XP operating system, is used as CPCI main equipment to communicate with other communication control modules through a CPCI bus, and is used for reading GJB289A bus communication modules, one 422 communication module and data messages of the discrete quantity, such as GJB289A, RS422 and discrete quantity acquired by the discrete quantity acquisition module in real time.
Preferably, the computer module is designed to comprise an initialization module, a data acquisition module, a data analysis module and a main program module;
the initialization module is used for completing power-on configuration of a bottom-layer board card, and comprises filter setting for monitoring messages of 3 GJB289A bus communication modules, wherein the filter setting is set to be full message receiving or partial message receiving; the configuration of baud rate, start bit, data bit, stop bit and check bit of RS422 communication and discrete quantity control module is completed to adapt to different test environments;
the data acquisition module is used for completing the reading function of receiving message data by the GJB289A bus communication module and the RS422 communication and discrete quantity control module, storing the read message according to the data analysis format, and reading and calling the message by the main program module;
the GJB289A bus communication module is used as a bus monitor BM and is used for acquiring messages on a GJB289A bus in real time, storing the message contents into a shared memory and reading the message contents by a data acquisition module in CPCI main equipment, 3 GJB289A bus communication modules are respectively accessed into different GJB289A buses, and meanwhile, the real-time acquisition function of 3-channel GJB289A bus messages is completed;
the RS422 communication and discrete quantity control module is used for completing the receiving function of the 2 paths of RS422 and the real-time acquisition function of the 2 paths of discrete quantities, and packaging the data in a binary data form for the data acquisition module to read;
the data analysis module is called and operated by the main program module through a function interface in a dynamic link library mode, and is used for finishing real-time calculation and conversion of the contents of binary messages, namely 1553 and 422, input to the main program module into a numerical value with physical significance following a certain format according to an ICD bus interface control file on CPCI main equipment, and outputting the numerical value to the main program module for use.
Preferably, the input of the data parsing module is a 1553 message, which includes a 1553 bus number, a message type, an RT address, a subaddress, an RT address 2, a subaddress 2, a message word length, a message content, or a 422 data content.
Preferably, the input interface format of the data parsing module is defined as table 1:
TABLE 1
Preferably, the output interface of the data parsing module is as shown in table 2:
TABLE 2
| Variable definition | Type of parameter | Meaning of parameters |
| blockID | Shaping machine | ID number of analysis data |
| parsedData | Pointer type | Parsed data |
H file, including defining message name corresponding to each block number, physical meaning information and numerical unit.
Preferably, the computer module further comprises a human-computer interaction module, wherein the human-computer interaction module is used for providing a user interaction interface and uniformly displaying the data content in the message block according to the physical meaning and the data content according to the block number information selected by the user.
Preferably, the system further comprises a display, a mouse and a keyboard.
The invention also provides a system designed by using the method.
The invention also provides a working method of the system, the main program module inquires whether the data acquisition module acquires the message, converts the 1553 message into an input interface form and calls the data analysis module once when receiving the message, and calls the data analysis module for multiple times in an acquisition period; when a 422 message is received, packaging the data in the acquisition period, and calling a primary data analysis module for analysis; the main program module puts the analyzed and output block number information and the data content into the shared memory in real time, and the man-machine interaction module searches the content of the data block number to be displayed in the shared memory in real time and displays the content in real time according to the head file definition interface analyzed and output.
(III) advantageous effects
The invention designs a data analysis and display interface, completes real-time acquisition and analysis of GJB289A and RS422 bus data through modularization and layering design, and displays the content of each data block in a form of actual physical significance. The method can finish real-time acquisition and display of data of different airplane systems by modifying the dynamic link library, can greatly improve the test efficiency, and provides an important means for system joint test and troubleshooting.
Drawings
FIG. 1 is a schematic block diagram of a system for real-time acquisition and display of aircraft bus data according to the present invention;
FIG. 2 is a schematic diagram of a real-time collection and display device of an aircraft bus data real-time collection and display method and system according to the present invention;
fig. 3 is a flow chart of software operation in the method and system for acquiring and displaying the aircraft bus data in real time according to the present invention.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
As shown in fig. 1, the aircraft bus data real-time acquisition and display system provided by the invention has a GJB289A interface, an RS422 interface and a discrete magnitude interface, the GJB289A interface is connected to a GJB289A bus of the aircraft system through a transit cable, and the RS422 interface and the discrete magnitude interface are connected to a transit tee cable, so that data information of the accessed system can be acquired and received in real time without affecting the normal operation of the original aircraft system.
As shown in fig. 2, the system is used for performing real-time data acquisition, analysis and display functions, and includes: a computer module, three GJB289A bus communication modules, an RS422 communication and discrete quantity control module, and peripherals such as a display, a mouse, a keyboard and the like;
the computer module runs a Windows XP operating system and provides a programming interface and a running platform for upper computer software of the real-time acquisition and display system.
The computer module is used as CPCI main equipment and is communicated with other communication control modules through a CPCI bus, and is used for reading data messages of GJB289A bus communication modules, GJB289A, RS422 and discrete quantity acquired by a 422 communication and discrete quantity acquisition module in real time;
the computer module adopts a modular design, reduces the coupling degree among the modules as much as possible, and enhances the universality and the portability of the modules, and specifically comprises an initialization module, a data acquisition module, a data analysis module, a main program module and a human-computer interaction module.
The initialization module is used for completing power-on configuration of a bottom-layer board card, and comprises filter setting for monitoring BM messages of 3 GJB289A bus communication modules, wherein the filter setting is full message receiving or partial message receiving; configuring the baud rate, the start bit, the data bit, the stop bit and the check bit of the RS422 communication and discrete quantity control module so as to be suitable for different test environments;
the initialization configuration information configured by the initialization module is stored through an XML file, has a memory function, is opened as the last configuration information by default, so that in the test of the same system, only one time of modification of the initialization configuration information is needed, the configuration can be stored in different configuration files for different test application occasions, only the corresponding configuration file needs to be selected during initialization, and the workload of test personnel can be saved.
The data acquisition module belongs to a bottom layer drive module, completes the function of reading message data received by a GJB289A bus communication module and an RS422 communication and discrete quantity control module, stores the read message according to a data analysis format, and is read and called by a main program module.
The GJB289A bus communication module is a universal standardized module, can be used as a bus monitor BM to acquire messages on a GJB289A bus in real time, stores the message contents in a shared memory, is read by a data acquisition module in CPCI main equipment, and is provided with 3 GJB289A bus communication modules which are respectively accessed into different GJB289A buses, so that the real-time acquisition function of 3-channel GJB289A bus messages can be simultaneously completed;
the RS422 communication and discrete quantity control module completes the receiving function of the 2 paths of RS422 and the real-time acquisition function of the 2 paths of discrete quantities, and packages the data in the form of binary data for the data acquisition module to read;
the data analysis module is called and operated by the main program module through a function interface in a dynamic link library mode, and is used for finishing real-time calculation and conversion of the contents of binary messages, namely 1553 and 422, input to the main program module by the main program module into numerical values with actual physical significance following a certain format according to an ICD bus interface control file on CPCI main equipment, and outputting the numerical values to the main program for use.
The data analysis module inputs a 1553 message including a 1553 bus number, a message type, an RT address, a subaddress, an RT address 2, a subaddress 2, a message word length, a message content, or a 422 data content, and a specific interface format is defined as the following table 1:
table 1 analytical software input interface table
The output interface is shown in table 2 below:
table 2 analytic software output interface table
| Variable definition | Type of parameter | Meaning of parameters |
| blockID | Shaping machine | ID number of analysis data |
| parsedData | Pointer type | Parsed data |
H file, defining the message name corresponding to each block number, the included physical meaning information and numerical value unit, etc.
The man-machine interaction module provides a user interaction interface, and uniformly displays the data content in the message block according to the physical meaning and the data content according to the block number information selected by the user.
The data acquisition, analysis and real-time display are completed through the modules, as shown in fig. 3, the main program module inquires whether the acquisition module acquires a message, converts the message into an input interface form to call the data analysis module once every 1553 messages are received, and calls the data analysis module for multiple times in an acquisition period; for the 422 message, the data in the acquisition period is packaged, and a primary data analysis module is called for analysis; the main program module puts the analyzed and output block number and the data content into the shared memory in real time, and the man-machine interaction module searches the content of the data block number to be displayed in the shared memory in real time and displays the content in real time according to the head file definition interface analyzed and output.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A design method of an airplane bus data real-time acquisition and display system is characterized in that the system is provided with a GJB289A interface, an RS422 interface and a discrete magnitude interface, the GJB289A interface is connected into a GJB289A bus of an airplane system through a switching cable, and the RS422 interface and the discrete magnitude interface are connected with a switching three-way cable to acquire data information of the connected system in real time.
2. The method of claim 1, wherein the system is configured to perform real-time data acquisition, interpretation and real-time display functions, comprising: a computer module, three GJB289A bus communication modules, an RS422 communication and discrete quantity control module;
the computer module runs a Windows XP operating system, is used as CPCI main equipment to communicate with other communication control modules through a CPCI bus, and is used for reading GJB289A bus communication modules, one 422 communication module and data messages of the discrete quantity, such as GJB289A, RS422 and discrete quantity acquired by the discrete quantity acquisition module in real time.
3. The method of claim 2, wherein the computer module is designed to include an initialization module, a data acquisition module, a data parsing module, a main program module;
the initialization module is used for completing power-on configuration of a bottom-layer board card, and comprises filter setting for monitoring messages of 3 GJB289A bus communication modules, wherein the filter setting is set to be full message receiving or partial message receiving; the configuration of baud rate, start bit, data bit, stop bit and check bit of RS422 communication and discrete quantity control module is completed to adapt to different test environments;
the data acquisition module is used for completing the reading function of receiving message data by the GJB289A bus communication module and the RS422 communication and discrete quantity control module, storing the read message according to the data analysis format, and reading and calling the message by the main program module;
the GJB289A bus communication module is used as a bus monitor BM and is used for acquiring messages on a GJB289A bus in real time, storing the message contents into a shared memory and reading the message contents by a data acquisition module in CPCI main equipment, 3 GJB289A bus communication modules are respectively accessed into different GJB289A buses, and meanwhile, the real-time acquisition function of 3-channel GJB289A bus messages is completed;
the RS422 communication and discrete quantity control module is used for completing the receiving function of the 2 paths of RS422 and the real-time acquisition function of the 2 paths of discrete quantities, and packaging the data in a binary data form for the data acquisition module to read;
the data analysis module is called and operated by the main program module through a function interface in a dynamic link library mode, and is used for finishing real-time calculation and conversion of the contents of binary messages, namely 1553 and 422, input to the main program module into a numerical value with physical significance following a certain format according to an ICD bus interface control file on CPCI main equipment, and outputting the numerical value to the main program module for use.
4. The method of claim 3, wherein the input to the data parsing module is a 1553 message comprising a 1553 bus number, a message type, an RT address, a subaddress, an RT address 2, a subaddress 2, a message word length, a message content, or a 422 data content.
5. The method of claim 4, wherein the input interface format of the data parsing module is defined as table 1:
TABLE 1
6. The method of claim 5, wherein the output interface of the data parsing module is as in Table 2:
TABLE 2
H file, including defining message name corresponding to each block number, physical meaning information and numerical unit.
7. The method of claim 3, wherein the computer module further comprises a human-computer interaction module, and the human-computer interaction module is used for providing a user interaction interface, and displaying the data content in the message block according to the physical meaning and the data content uniformly according to the block number information selected by the user.
8. The method of claim 1, wherein the system further comprises a display, a mouse, and a keyboard.
9. A system designed using the method of claim 7.
10. A method of operating the system of claim 9, comprising the steps of: the main program module inquires whether the data acquisition module acquires a message, converts the 1553 message into an input interface form and calls the data analysis module once when receiving the message, and calls the data analysis module for multiple times in an acquisition period; when a 422 message is received, packaging the data in the acquisition period, and calling a primary data analysis module for analysis; the main program module puts the analyzed and output block number information and the data content into the shared memory in real time, and the man-machine interaction module searches the content of the data block number to be displayed in the shared memory in real time and displays the content in real time according to the head file definition interface analyzed and output.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112800124A (en) * | 2021-04-15 | 2021-05-14 | 成都赢瑞科技有限公司 | Computer aided design model integration system and method based on interface control file |
| CN117446203A (en) * | 2023-10-26 | 2024-01-26 | 中航通飞华南飞机工业有限公司 | 429 bus general aircraft avionics cross-linking fault test method |
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