Airborne 1394B bus error rate distributed interconnection test system

Abstract

The invention relates to the technical field of 1394B bus test, in particular to an airborne 1394B bus bit error rate distributed interconnection test system, which comprises a hardware part: a host which adopts a firm computer structure; the distributed test module is of a multi-channel structure; the adapter cables are of various types and are uniform in length; the adapter cable intelligent storage cabinet is in wireless communication connection with the host; the software part comprises an error rate test module arranged on the host; the 3D view module is arranged on the host; and the test management function module is arranged on the host. The airborne 1394B bus bit error rate distributed interconnection test system provided by the invention has the advantages that the cost of the adapter cable is low, the attenuation is small, and the maintenance is convenient; test equipment is portable, and test port configuration is modularized and flexible; the test mode is free, and the test is efficient; and the adapter cable is intelligent in storage and selection.

Description

Technical Field

[0001] The present invention relates to the technical field of 1394B bus testing, and particularly to an airborne 1394B bus bit error rate distributed interconnection testing system. Background Art

[0002] Due to its special use environment and high reliability requirements, the physical layer characteristics of the airborne 1394B cable need to be regularly checked to ensure the integrity and accuracy of the bus signal transmitted by the 1394B cable during flight. To ensure the integrity of the bus signal transmitted by the 1394B cable, it is necessary to verify the bit error rate of the 1394B bus.

[0003] Taking a certain type of aircraft as an example, the test time on a single bus cable is about 40 minutes. The test method is as follows: After adjusting the voltage of the D / A circuit at the output end of the test equipment to meet the conditions, a data packet is sent by one node of the test equipment, transmitted through the 1394B bus cable, and received by another node. The number of bits to be sent for the current test is calculated according to a specific algorithm. During this process, it is judged whether there are bit errors in the received data. After the test is completed, a reverse test is carried out to achieve the purpose of testing the bit error rate of the cable transceiver.

[0004] When testing the bit error rate of the bus cable, the connection method between the bus cable and the device is as follows: The first one: Both ends of the bus cable under test are directly connected to the two ports of the device (applicable to the case where the output port of the device matches the connector of the cable under test), as Figure 1 shown; The second one: The cable under test is connected to the two ports of the device through two special adapter cables, as Figure 2 shown. These two traditional test methods are applicable to the test of the bus cable on the workbench surface, or the test of the bus cable with a small quantity, few connector types, and relatively concentrated distribution.

[0005] In the airborne environment, in-situ detection of the 1394B bus cable on the aircraft is required. Since both ends of the 1394B bus cable are distributed at different positions of the aircraft, the distance between the two ends of the bus cable cannot be changed during the test, and there are many bus cables on the aircraft, with many types and scattered distribution, having the characteristics of large span and complex layout. If the traditional centralized test method is used for detection, the following problems exist:

[0006] 1. A long adapter cable is required. The problems caused by the long adapter cable are as follows: increasing the cost of manufacturing the adapter cable, increasing the test error caused by the adapter cable, increasing the risk of damage to the adapter cable during use, and increasing the cable maintenance cost;

[0007] 2. To meet the requirements of the test cycle (the test time for each cable is relatively long), it is necessary to increase as many test equipment ports as possible to simultaneously test multiple cables. However, a large number of ports lead to a huge volume of the test equipment, which is not conducive to on-site operations. Moreover, since the test equipment is connected to multiple bus cables on the aircraft, due to the long length and large quantity of the adapter cables, the risk of damage to the connection ports of the detection equipment and the cable connectors on the aircraft is increased.

[0008] 3. When detecting multiple cables simultaneously, it is necessary to equip special adapter cables of different types (different connector types and different cable lengths). The total volume and total weight of the adapter cables are relatively large, which brings inconvenience to the storage of the adapter cables and is prone to confusion when connecting the test cables on the aircraft.

[0009] 4. The test equipment only displays the test results of qualified and unqualified for the bus cables, lacking monitoring of the test process, which is not convenient for the test personnel to master the test status of the whole aircraft's cable.

[0010] Currently, the centralized test method adopted for the test of airborne 1394B bus cables in China requires the development of a bus test system suitable for complex airborne environments and field environments. Summary of the Invention

[0011] To solve the above technical problems, the present invention proposes a distributed interconnection test system for the bit error rate of airborne 1394B bus, which is used to detect the bit error rate of 1394B bus under airborne conditions.

[0012] The technical problems to be solved by the present invention are realized by the following technical solutions:

[0013] A distributed interconnection test system for the bit error rate of airborne 1394B bus includes:

[0014] Hardware part:

[0015] A host computer, adopting a rugged computer structure, is used for system control and data analysis;

[0016] A distributed test module, with a multi-channel structure, is used to simultaneously measure multiple cables under test;

[0017] Adapter cables, including various types and with a unified length, are used to connect the distributed test module and the cables under test to simultaneously perform bit error rate tests;

[0018] An intelligent storage cabinet for adapter cables, wirelessly connected to the host computer, is used to receive the control commands of the host computer and realize the intelligent linkage display function of the identification of the adapter cables and their storage positions with the test software on the host computer;

[0019] Software part:

[0020] The bit error rate test module is set on the host and is used for matching the cable under test with the test port and setting test parameters;

[0021] The 3D view module is set on the host and is used for dynamically displaying the test process of the cable under test;

[0022] The test management function module is set on the host and is used for providing query of test results.

[0023] As a further improvement of the present invention, the host includes a high-definition display screen, an inlaid keyboard, and a touchpad mouse.

[0024] As a further improvement of the present invention, the connection between the distributed test module and the host includes a wired communication connection and a wireless communication connection.

[0025] As a further improvement of the present invention, the distributed test module includes power supply by power cord and battery, and a detachable battery module is provided on the distributed test module.

[0026] As a further improvement of the present invention, the intelligent storage cabinet for adapter cables includes an industrial computer, a radio frequency networking module connected to the industrial computer, a three-color status light control circuit, and a status indicator light. The intelligent storage cabinet for adapter cables is provided with storage cells and storage cell compartment doors. The industrial computer is connected to the host through the radio frequency networking module. The three-color status light control circuit is connected to the status indicator light circuit. The status indicator light is set above the storage cells, and the storage cell compartment doors are located at the exits of the storage cells.

[0027] As a further improvement of the present invention, the status indicator light includes three display states: green, yellow, and red, and is synchronized with the display state in the 3D view module on the host.

[0028] As a further improvement of the present invention, the bit error rate test module includes creating a test plan, opening a test plan, saving a test plan, cable assembly, connection self-check, starting / stopping the test, and cable recovery.

[0029] The beneficial effects of the present invention are:

[0030] The present invention provides an airborne 1394B bus bit error rate distributed interconnection test system, which has the advantages of low cost, low attenuation, and convenient maintenance of the adapter cable; portability of the test equipment, modularization and flexibility of the test port configuration; freedom of the test method, high test efficiency; intelligence of the storage and selection of the adapter cable, etc. Description of the Drawings

[0031] The following further describes the present invention in conjunction with the drawings and embodiments:

[0032] Figure 1 It is a schematic diagram of the first connection method during the current bit error rate test of the bus cable;

[0033] Figure 2 It is a schematic diagram of the second connection method during the current bus cable bit error rate test;

[0034] Figure 3 It is a schematic diagram of the structure of the host computer in the present invention;

[0035] Figure 4 It is the display interface of the high-definition display screen in the present invention;

[0036] Figure 5 It is a schematic diagram of the structure of the distributed test module in the present invention;

[0037] Figure 6 It is a structural block diagram of the adapter cable intelligent storage cabinet in the present invention;

[0038] Figure 7 It is a schematic diagram of the external structure of the adapter cable intelligent storage cabinet in the present invention;

[0039] Figure 8 It is a schematic diagram of the use of the test system in the present invention Figure 1 ;

[0040] Figure 9 It is a schematic diagram of the use of the test system in the present invention Figure 2 。

[0041] In the figure: 1. Host computer; 11. High-definition display screen; 12. Embedded keyboard; 13. Touchpad mouse; 2. Distributed test module; 21. Removable battery module; 3. Adapter cable; 4. Adapter cable intelligent storage cabinet; 41. Industrial control computer; 42. Radio frequency networking module; 43. Three-color status light control circuit; 44. Storage grid door; 45. Status indicator light; 46. Storage grid. Specific implementation mode

[0042] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0043] An airborne 1394B bus bit error rate distributed interconnection test system mainly includes a host computer 1, a distributed test module 2, an adapter cable 3, and an adapter cable intelligent storage cabinet 4.

[0044] As Figure 3 shown is a schematic diagram of the structure of the host computer 1. The host computer 1 adopts a rugged computer structure as a whole and is equipped with a high-definition display screen 11, an embedded keyboard 12, and a touchpad mouse 13. It is used for system control and data analysis.

[0045] The system software is installed in the host 1 and mainly includes a bit error rate test module, a 3D view module, and a test management function module. As Figure 4 shown.

[0046] The bit error rate test module includes steps such as creating a test plan, opening a test plan, saving a test plan, cable assembly, connection self-check, starting / stopping the test, and cable recovery. It can perform the matching of the cable under test and the test port and the setting of test parameters.

[0047] The 3D view module has the ability to dynamically display the cable testing process: the software test interface can be switched to the three-dimensional simulation interface of the aircraft. The aircraft model can be dynamically rotated and adjusted, and the test cable is highlighted using lighting effects to show the distribution of cables on the aircraft and the progress of cable testing (using different colors to dynamically display the cable test status: tested, to be tested, testing, qualified, faulty, etc.). The device has a split screen function and can be connected to a large screen display.

[0048] The test management function module is used to provide test result query. It can filter the test results according to the parameter name and at the same time provide the export of test results in excel\txt\word formats.

[0049] The distributed test module 2 has a multi-channel structure and is used to measure multiple cables under test simultaneously. Since the reception test of each cable under test is a two-way verification, that is, two ports are required for each cable under test, the number of RM external test ports is twice the number of channels. The distributed test module 2 can cooperate with each other to test the bus cable or can independently test the bus cable.

[0050] Furthermore, the connection between the distributed test module 2 and the host 1 includes a wired communication connection and a wireless communication connection. Among them, the wireless communication is realized through the host 1 and the radio frequency networking module installed in the distributed test module 2. When the node goes offline, the distributed test module 2 enters the sleep mode to reduce the power consumption of the node and extend the working time of the node.

[0051] Furthermore, the distributed test module 2 includes two power supply methods: power supply by power cord and power supply by battery. When the distributed test module 2 conducts wired communication and uses power supply by power cord, the signal line and the power cord are bundled, and the connectors at both ends use aviation plugs, which are safe and reliable for connection.

[0052] As Figure 5 shown, it is the structural schematic diagram of the distributed test module 2. A detachable battery module 21 is provided on the distributed test module 2. When using the power cord in the inner field, the detachable battery module 21 can be detached to make the distributed test module lighter; when there is no power source on site or in the outer field, the detachable battery module 21 is installed for power supply.

[0053] In addition, the distributed test module 2 is integrated with systems such as the MES system, digital work card management system, and TDM system for repair; meanwhile, an integration interface is reserved for extension and integration to other system platforms.

[0054] The adapter cable 3 includes multiple types and has a unified length, which is used to connect the distributed test module 2 and the cable under test for bit error rate testing at the same time; it can simultaneously perform bit error rate testing on 1394B bus cables composed of 28 different connectors on the aircraft. In this embodiment, there are 58 adapter cables 3 in total.

[0055] Such as Figure 6 And Figure 7 As shown, it is the structural block diagram and schematic diagram of the adapter cable intelligent storage cabinet 4, which mainly includes an industrial control computer 41, a radio frequency networking module 42 connected to the industrial control computer 41, a three-color status light control circuit 43, and a status indicator light 45. The adapter cable intelligent storage cabinet 4 is provided with storage cells 46 and storage cell doors 44. The industrial control computer 41 is connected to the host 1 through the radio frequency networking module 42. The three-color status light control circuit 43 is electrically connected to the status indicator light 45. The status indicator light 45 is arranged above the storage cell 46, and the storage cell door 44 is located at the outlet of the storage cell 46. Among them, the radio frequency networking module 42 realizes wireless communication with the host. Through the radio frequency networking module 42, the industrial control computer receives the control command of the host 1, and realizes the intelligent linkage display function of the adapter test cable identification, its storage position identification, and the test system test software.

[0056] The adapter cable intelligent storage cabinet 4 is provided with a plurality of storage cells 46, storage cell doors 44, and status indicator lights 45. Each status indicator light 45 includes three display states: green, yellow, and red, and is synchronized with the display state in the 3D view module on the host 1. Among them, green represents that the adapter cable in the corresponding storage cell 46 can be used normally, yellow represents that the adapter cable in the corresponding storage cell 46 is faulty, and red represents that the adapter cable in the corresponding storage cell 46 is performing a test task.

[0057] When a certain bus cable test is selected on the software interface of the host 1, the status indicator light 45 above the storage cell 46 corresponding to the adapter cable 3 on the adapter cable intelligent storage cabinet 4 lights up, which is convenient for taking. After use, the adapter cable 3 should be put back into the corresponding storage cell 46. If the adapter cable 3 is stored incorrectly, the status indicator light 45 above the corresponding storage cell 46 flashes and gives an alarm prompt, which has a strong anti-error function.

[0058] The working principle and usage process of the present invention:

[0059] During use, Scenario 1 (black line): Such asFigure 8 As shown in the figure, in the figure, RM represents the distributed test module 2, and there are multiple ones, represented by RM1 and RM2. Node1-1 and Node2-1 of RM1 in the figure are connected to the head end of the cable under test on the machine, and Node1-1 and Node2-1 of RM2 are connected to the tail end of the cable under test on the machine. Data is sent from one port and verified at the other end (it can also be verified in the reverse direction).

[0060] Scenario 2 (blue line): As Figure 9 shown in the figure, in the figure, RM represents the distributed test module 2, and there are multiple ones, represented by RM1 and RM2. Node7-2 of RM1 in the figure is connected to the head end of the cable under test on the machine, and Node9-2 of RM1 is connected to the tail end of the cable under test on the machine. Data is sent from one port and verified at the other end (it can also be verified in the reverse direction).

[0061] Scenario 3 (black and blue lines): The above two scenarios can exist simultaneously. For example Figure 8 as shown in the figure, on-board testing of Bus Cables No. 1, No. 2, and No. 3 is carried out in the on-board environment. RM1 and RM4 are placed near both ends of Bus Cable No. 1, in Area A and Area C, to cooperate with each other for testing; since the span of Cable No. 2 is not large, RM2 can independently test Cable No. 2. Since the head ends and tail ends of Cable No. 2 and Cable No. 3 are relatively close, RM3 and RM5 can be placed near Area B to simultaneously test Cable No. 2 and Cable No. 3.

[0062] The above shows and describes the basic principle, main features, and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An airborne 1394B bus bit error rate distributed interconnection test system, characterized in that: Including: Hardware part: Host computer (1), adopting a rugged computer structure, used for system control and data analysis; Distributed test module (2), with a multi-channel structure, used for simultaneously measuring multiple cables under test; Adapter cable (3), including various types and with a unified length, used for connecting the distributed test module (2) and the cable under test to conduct bit error rate tests simultaneously; Intelligent storage cabinet for adapter cables (4), wirelessly communicatively connected to the host computer (1), used for receiving the control commands of the host computer (1) to realize the intelligent linkage display function of the identification of the adapter cable (3) and its storage location identification with the test software on the host computer (1); Software part: Bit error rate test module, set on the host computer (1), used for matching the cable under test with the test port and setting test parameters; 3D view module, set on the host computer (1), used for dynamically displaying the test process of the cable under test; Test management function module, set on the host computer (1), used for providing query of test results.

2. The distributed interconnection test system for the bit error rate of the airborne 1394B bus according to claim 1, characterized in that: The host computer (1) is equipped with a high-definition display screen (11), an embedded keyboard (12), and a touchpad mouse (13).

3. An airborne 1394B bus bit error rate distributed interconnection test system according to claim 1, characterized in that: The connection between the distributed test module (2) and the host computer (1) includes wired communication connection and wireless communication connection.

4. An airborne 1394B bus bit error rate distributed interconnection test system according to claim 1, characterized in that: The distributed test module (2) includes power supply by power cord and battery supply, and a detachable battery module (21) is set on the distributed test module (2).

5. An airborne 1394B bus bit error rate distributed interconnection test system according to claim 1, characterized in that: The intelligent storage cabinet for adapter cables (4) includes an industrial computer (41), a radio frequency networking module (42) connected to the industrial computer (41), a three-color status light control circuit (43), and a status indicator light (45). Storage cells (46) and storage cell compartment doors (44) are set on the intelligent storage cabinet for adapter cables (4). The industrial computer (41) is connected to the host computer (1) through the radio frequency networking module (42). The three-color status light control circuit (43) is circuit-connected to the status indicator light (45). The status indicator light (45) is set above the storage cells (46), and the storage cell compartment doors (44) are located at the outlet of the storage cells (46).

6. An airborne 1394B bus bit error rate distributed interconnection test system according to claim 5, characterized in that: The status indicator light (45) includes three display states: green, yellow, and red, and is synchronized with the display state in the 3D view module on the host computer (1).

7. An airborne 1394B bus bit error rate distributed interconnection test system according to claim 1, characterized in that: The bit error rate test module includes creating a test plan, opening a test plan, saving a test plan, cable assembly, connection self-check, starting / stopping the test, and cable recycling.

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