CN113485288B - Airborne system distributed in-situ test equipment and test method - Google Patents
Airborne system distributed in-situ test equipment and test method Download PDFInfo
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- CN113485288B CN113485288B CN202110708176.2A CN202110708176A CN113485288B CN 113485288 B CN113485288 B CN 113485288B CN 202110708176 A CN202110708176 A CN 202110708176A CN 113485288 B CN113485288 B CN 113485288B
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Abstract
The invention belongs to the technical field of measurement and control, and particularly relates to distributed in-situ test equipment and a test method for an airborne system. The technical scheme can carry out in-situ monitoring under the condition that the normal work of the test object is not influenced, and also can realize in-situ fault detection quickly by simulating or simulating various electrical environments of the test object during working through the ground under the condition that an airplane airborne system is not detached and collecting and processing working signals of the test object in real time, thereby avoiding fussy part dismounting and mounting procedures and effectively shortening the time of detection and troubleshooting.
Description
Technical Field
The invention belongs to the technical field of measurement and control, and particularly relates to distributed in-situ test equipment and a test method for an airborne system.
Background
At present, the degree of integration of an airborne system of the military aircraft is greatly improved, the data and logic cross-linking relation among systems is complex, and the difficulty in detecting and positioning faults of the system is high. The position of each cross-linking device of the airborne system is dispersed in the troubleshooting process, and the existing in-situ test device (mostly integrated detection device) is inconvenient to use, low in detection efficiency and incapable of realizing rapid positioning of faults. Most of the devices are special devices designed for specific procedures or specific onboard systems/finished products, the universality is not high, and generally, the devices can only test and eliminate faults and the like for some specific onboard systems/finished products.
Disclosure of Invention
The invention aims to provide distributed in-situ test equipment and a test method for an airborne system according to the defects of the prior art, the equipment can rapidly realize fault detection or isolation in situ under the condition of not disassembling the airborne system/finished products, and solves the problems of low universality, inconvenient use, low detection efficiency and the like of the existing in-situ test equipment of an airplane general assembly site or an external field.
The invention is realized by the following technical scheme:
the distributed in-situ test equipment for the airborne system comprises an in-situ test development host, a control host and a test main unit which are sequentially in communication connection. The in-situ test development host is an independent system, can exist in a remote workstation, is internally provided with in-situ development system software, can independently perform the work of test strategy development, test resource description, test data analysis and the like, provides a test strategy compiling environment and downloads a test strategy to the control host, and can be connected and communicated with the control host through a local area network when data exchange is required; in addition, the large amount of data transmitted by the test main unit via the control host needs to be processed and stored in the in-situ test development host to complete the final management and analysis of the test data. The control host computer adopts a mode of a reinforced tablet computer, the 'test front-end control system software' is deployed in the control host computer, a test strategy execution program developed by the in-situ test development host computer is downloaded, the test main unit is controlled to complete in-situ test on the computer, and meanwhile, data acquired by the test main unit in the test process are processed and displayed. Furthermore, the control host internally comprises a GPS time service module, and the GPS can be used for time service on the control host. The test main unit comprises a plurality of test front ends, all the test front ends are matched to be distributed in a cascade networking structure or a disperse networking structure, namely, the control host and each test front end are communicated through a network, the operation mode of the test equipment comprises two modes of cascade networking operation and disperse networking operation, flexible adjustment can be carried out according to different environments and test requirements, and distributed in-situ test is achieved. The test front end comprises an encapsulation shell, a test mainboard and a plurality of function board cards, and the test mainboard and all the function board cards are arranged in the encapsulation shell. The packaging shell is used for packaging and protecting the test mainboard and the functional board card so as to improve the integration degree of the test front end, enable the test front end to be commercialized under the condition of ensuring the strength and the sealing property and facilitate the deployment of test equipment; inside the encapsulation shell, the test mainboard and the functional board card are mutually matched and used for testing related tested signals of a test object. The test mainboard is integrated with a power conversion module, an Ethernet switch, a synchronous time service module, an RS422 bus communication module and a signal transfer module; the signal switching module is in communication connection with the Ethernet switch through an RS422 bus communication module, and the synchronous time service module is in communication connection with the Ethernet switch; the packaging shell is provided with a power supply access port electrically connected with the power supply conversion module, a test interface in communication connection with the signal conversion module, and a cascade interface and a communication interface which are in communication connection with the Ethernet switch respectively. In the test mainboard, a power supply conversion module is used for converting an externally accessed 28V point power supply into a 5V and +/-15V power supply required by a test front end; the Ethernet switch is a switch for transmitting data based on Ethernet, the Ethernet adopts a local area network in a shared bus type transmission media mode, and the Ethernet switch is used for realizing the communication between a test front end and a control host in the technical scheme; the synchronous time service module is a PTP (precision time service) module, can realize the clock synchronization of each test front end and the control host through an LAN (local area network) bus, and simultaneously performs time service on each functional board card in the front end, thereby ensuring the synchronism of the acquisition time; the signal switching module is used for distributing detection signals sent by a test object according to the properties of the signals, sending the signals with the 422 bus property to the RS422 bus communication module, and sending the signals with the non-422 bus property to the functional board card for testing; the RS422 bus communication module is used for converting 422 bus property signals into LAN bus property signals required by the Ethernet switch and converting the LAN bus property signals into 422 bus property signals required by the signal transfer module; in addition, each interface on the packaging shell meets the power supply access requirement and the product test requirement. The functional board card comprises a carrier board and a daughter board; the carrier plate integrates an external connector X1, a first sub-board connector J1, a second sub-board connector J2, an FPGA module, a DC _ DC power supply and an Ethernet interface module; the external connector X1 is used as an interface of the functional board card and the test mainboard and comprises a communication interface unit, a test/excitation signal interface used for connecting a signal switching module and a power interface used for connecting a power conversion module, wherein the communication interface unit comprises a UART interface, a LAN interface used for connecting an Ethernet switch and a PPS interface used for connecting a synchronous time service module; the testing/exciting signal interface is in communication connection with the first sub-board connector J1, the power interface is electrically connected with the DC _ DC power supply, the LAN interface is in communication connection with the FPGA module through the Ethernet interface module, and the UART interface, the PPS interface and the second sub-board connector J2 are in communication connection with the FPGA module respectively; the daughter board integrates functional circuits, a first carrier board connector P1 for connecting the first daughter board connector J1, and a second carrier board connector P2 for connecting the second daughter board connector J2. The UART interface is used for debugging a functional board card, namely, the UART interface of the debugging computer sends a debugging command to the FPGA module to debug the functional board card; the DC-DC power supply is used for converting 5V and +/-15V power supply provided by the test mainboard into 3.3V and 2.5V working power supply for internal use of the functional board card.
Furthermore, in the distribution of the cascade networking structure, the test interfaces of all the test front ends are connected together, all the test front ends are sequentially in communication connection from left to right through the communication interfaces and the cascade interfaces, in every two adjacent test front ends, the cascade interface at the left test front end is in communication connection with the communication interface at the right test front end, and the communication interface at the leftmost test front end is in communication connection with the control host.
Furthermore, in the distribution of the distributed networking structure, the distributed networking structure further comprises a network switch in communication connection with the control host, and the communication interfaces of all the testing front ends are in communication connection with the network switch respectively.
Furthermore, the packaging shell comprises a main shell, a front panel and a rear panel, wherein the main shell is of a hollow cuboid structure with two open ends; the front panel and the rear panel are respectively arranged at the openings at the two ends of the main shell and are respectively detachably and hermetically connected with the main shell; the test interface is arranged on the front panel, and the power supply access port, the communication interface and the cascade interface are arranged on the rear panel.
Furthermore, an internal support with a board clamping groove is further arranged inside the packaging shell, and the functional board is inserted into the test mainboard through the board clamping groove of the internal support.
Based on the distributed in-situ test equipment for the airborne system, the technical scheme provides a distributed in-situ test method for the airborne system, which comprises the following steps:
s1, designing or selecting a special daughter card according to a required test function, and enabling the daughter card to be accessed into a carrier card to form a function board card;
s2, inserting a sufficient number of functional board cards into the test mainboard under the condition of ensuring that each interface of the functional board cards corresponds to the relevant component of the test mainboard;
s3, connecting a plurality of test front ends in the test main unit according to test requirements;
s4, sequentially carrying out communication connection on the in-situ test development host, the control host and the connected test main unit;
and S5, connecting the test object to a test interface on the packaging shell, connecting an external power supply through a power interface on the packaging shell, and then entering a test flow.
Further, in S3, when the test object is single and the test resource of one test front cannot meet the test requirement, a plurality of test front are connected according to the distribution form of the cascade networking structure; and when the test objects are not single and/or the test objects are widely distributed, connecting the plurality of test front ends according to the distribution of the distributed networking structure.
Further, the test flow in step S5 includes signal distribution, 422 bus signal processing, and non-422 bus signal processing;
the signal distribution is to introduce a tested signal of a test object into a signal transfer module through a test interface, wherein the tested signal comprises a 422 bus signal and a non-422 bus signal; distributing the tested signals by using a signal transfer module, sending 422 bus signals to an RS422 bus communication module, and sending non-422 bus signals to a test board card through a test/excitation signal interface;
the 422 bus signal processing comprises the steps of converting 422 bus signals into LAN bus signals by using an RS422 bus communication module, then sending the LAN bus signals to a control host by using an Ethernet switch, sending out new LAN bus signals after the control host receives the LAN bus signals, returning the new LAN bus signals to the RS422 bus communication module by using the Ethernet switch, converting the new LAN bus signals into the new 422 bus signals by using the RS422 bus communication module, and returning the new 422 bus signals to a test object by using a signal transfer module;
and the non-422 bus signal processing is to test the non-422 bus signal by using a test board card and send a test result to the control host through the Ethernet switch based on the LAN bus.
Furthermore, before signal distribution, the method also comprises the steps of synchronizing the clocks of each test front end and the control host by utilizing a synchronous time service module based on the LAN bus, and simultaneously carrying out time service on each functional board card in the test front end so as to ensure the synchronism of signal acquisition time.
The beneficial effect that this technical scheme brought:
1) The test equipment supports the adoption of a T-shaped cable to be connected into the airplane, so that in-situ monitoring is realized under the condition that the normal work of a test object is not influenced; in addition, based on the technical scheme, the excitation signal can be generated, and ground simulation or emulation conditions are provided for the test object, so that the technical scheme can support various electrical environments when the test object works through ground simulation or emulation under the condition that an aircraft airborne system is not disassembled, simultaneously collects and processes the working signal of the test object in real time, rapidly realizes in-situ fault detection, avoids complex part disassembly and assembly procedures, and can effectively shorten the time for detection and troubleshooting.
2) In the technical scheme, the FPGA module is adopted in the carrier plate and serves as a programmable controller, the FPGA module is a main control device of the function board card and is also an important component for realizing the universality of the carrier plate, in the actual application, the test function of the function board card can be expanded only by replacing the daughter board, the function board card is expanded in the later period only by focusing on a specific function circuit, circuits such as a power supply and a test mainboard are not required to be designed repeatedly, and conditions are created for realizing the good universality of the test equipment.
3) According to the technical scheme, the RS422 bus communication module can be used for easily realizing the utilization of RS422 bus signals sent by the test object, so that the control host sends a feedback signal, whether the communication between the test object and the test equipment is normal or not is quickly judged according to the feedback signal, the real-time monitoring of the communication between the test object and the test equipment is further realized, and the reliability of the test equipment is improved.
4) According to the technical scheme, the test strategy development is realized on the basis of the in-situ test development host, the extension of the test function is realized by replacing the daughter board of the function board, namely, software and hardware of the test equipment are all in a reconfigurable design, the function board at the corresponding test front end can be replaced according to the actual test task, the test strategy is developed, and the utilization rate of the test equipment is improved.
5) The technical scheme comprises two operation modes of cascading networking and decentralized networking, and the cascading networking or the decentralized networking can be selected according to the actual situation of the test object, so that the test tasks with a plurality of test objects, wide distribution of the test objects and a plurality of test resource requirements of a single test object are met.
Drawings
FIG. 1 is a block diagram of a test device based on a cascaded networking fabric distribution;
FIG. 2 is a block diagram of a testing device based on a distributed networking architecture;
FIG. 3 is a schematic front oblique view of the test front end;
FIG. 4 is a rear perspective view of the test front;
FIG. 5 is a schematic illustration of an exploded view of a test front end;
FIG. 6 is a block diagram of the structure of the test motherboard;
FIG. 7 is a block diagram of a composition structure of a carrier;
FIG. 8 is a block diagram of the constituent structure of the daughter board;
in the figure:
1. a main housing; 2. a front panel; 3. a rear panel; 4. testing and connecting; 5. a power supply access port; 6. a communication interface; 7. a cascade interface; 8. an inner support.
Detailed Description
The invention is further described in the following with reference to the drawings and examples, but it should not be understood that the invention is limited to the examples below, and variations and modifications in the field of the invention are intended to be included within the scope of the appended claims without departing from the spirit of the invention.
Example 1
The embodiment discloses distributed in-situ test equipment for an airborne system, which is used as a basic implementation scheme of the invention and comprises an in-situ test development host, a control host and a test main unit which are sequentially in communication connection, wherein the test main unit comprises a plurality of test front ends, all the test front ends are matched to be distributed in a cascade networking structure or a disperse networking structure, the test front ends comprise a packaging shell, a test mainboard and a plurality of function board cards, and the test mainboard and all the function board cards are arranged inside the packaging shell; the test mainboard is integrated with a power supply conversion module, an Ethernet switch, a synchronous time service module, an RS422 bus communication module and a signal switching module; the signal switching module is in communication connection with the Ethernet switch through an RS422 bus communication module, and the synchronous time service module is in communication connection with the Ethernet switch; the packaging shell is provided with a power supply access port electrically connected with the power supply conversion module, a test interface in communication connection with the signal conversion module, and a cascade interface and a communication interface which are in communication connection with the Ethernet switch respectively; the functional board card comprises a carrier board and a daughter board; the carrier plate integrates an external connector X1, a first sub-board connector J1, a second sub-board connector J2, an FPGA module, a DC _ DC power supply and an Ethernet interface module; the external connector X1 is used as an interface of the functional board card and the test mainboard and comprises a communication interface unit, a test/excitation signal interface used for connecting a signal switching module and a power interface used for connecting a power conversion module, wherein the communication interface unit comprises a UART interface, a LAN interface used for connecting an Ethernet switch and a PPS interface used for connecting a synchronous time service module; the testing/exciting signal interface is in communication connection with the first sub-board connector J1, the power interface is electrically connected with the DC _ DC power supply, the LAN interface is in communication connection with the FPGA module through the Ethernet interface module, and the UART interface, the PPS interface and the second sub-board connector J2 are in communication connection with the FPGA module respectively; the daughter board integrates functional circuits, a first board carrier connector P1 for connecting the first daughter board connector J1, and a second board carrier connector P2 for connecting the second daughter board connector J2.
Before the test is executed, a corresponding function board card is inserted into a test main board, so that a daughter board is connected with a signal transfer module based on a test/excitation signal interface, an Ethernet interface module is connected with an Ethernet switch based on an LAN interface, an FPGA module is connected with a synchronous time service module based on a PPS interface, a DC _ DC power supply is connected with a power supply conversion module based on a power supply interface, and a plurality of test board cards can be inserted into one test main board according to actual test requirements; and then, connecting the test object into the corresponding test interface, and connecting an external power supply at the power supply access port. When the test is executed, a tested signal of a test object is introduced from the test interface, after signal distribution of the signal switching module, non-422 bus signals (such as analog signals and digital signals) respectively enter each functional board card, and 422 bus signals enter the RS422 bus communication module. Before signal distribution, the synchronous time service module can realize clock synchronization of each test front end and a control host through an LAN bus, and simultaneously service time to each function board card in the front end, so that the synchronism of signal acquisition time is ensured, and finally tested data is more accurate and reliable. After signal distribution, 422 bus signals are converted into LAN bus signals by the RS422 bus communication module, then the LAN bus signals are sent to the control host computer through the Ethernet switch, the control host computer sends feedback signals of LAN bus properties to the test front end mainboard after receiving the signals, the feedback signals of the LAN bus properties are sent to the RS422 bus communication module through the Ethernet switch, then the RS422 bus communication module converts the feedback signals of the LAN bus properties into new 422 bus property feedback signals, the 422 bus property feedback signals are transmitted back to the test object through the signal switching module, and whether the communication between the test object and the test equipment is normal can be quickly judged according to the feedback signals; non 422 bus signals (including analog signals, digital signals and the like) sequentially pass through a test/excitation signal interface, a first daughter board connector J1 and a first carrier board interface P1, enter a functional circuit of a daughter board, are processed by the functional circuit, sequentially pass through a second carrier board interface P2 and a second daughter board connector J2, and enter an FPGA module, the FPGA module sends out corresponding level signals carrying test information according to the received non 422 bus signals, the level signals are converted into LAN bus signals through the Ethernet interface module and sent to an Ethernet switch, the Ethernet switch transmits the LAN bus signals back to a control host, and the control host processes the LAN bus signals and displays the test information carried in the LAN bus signals. Some test objects can normally run only by excitation signals, therefore, the technical scheme can also generate corresponding excitation signals according to needs, specifically, LAN bus signals are sent out by the control host, sent to the carrier board through the ethernet switch, logic level conversion is carried out on the LAN bus signals through the ethernet interface module to obtain level signals, the level signals are sent to the FPGA module, the FPGA module sends out control signals according to the level signals, the control signals sequentially pass through the second sub-board connector J2 and the second carrier board interface P2 to enter the functional circuit, the functional circuit is controlled to generate an excitation signal, the excitation signals sequentially pass through the first carrier board interface P1, the first sub-board connector J1 and the test/excitation signal interface to enter the signal transfer module, and the signal transfer module distributes the excitation signals to the test interface, so that the excitation signals are provided for the test objects.
In the technical scheme, the FPGA module is adopted in the carrier plate and serves as a programmable controller, the FPGA module is a main control device of the function board card and is an important component part for realizing the universality of the carrier plate, in the actual application, the test function of the function board card can be expanded only by replacing the daughter board, the function board card is expanded in the later period only by focusing on a specific function circuit, circuits such as a power supply and a test mainboard are not required to be designed repeatedly, and conditions are created for realizing the good universality of the test equipment.
According to the technical scheme, the RS422 bus communication module can be used for easily realizing the utilization of the RS422 bus signal sent by the test object, so that the control host sends the feedback signal, whether the communication between the test object and the test equipment is normal or not is quickly judged according to the feedback signal, the real-time monitoring of the communication between the test object and the test equipment is further realized, and the reliability of the test equipment is improved.
The test equipment supports the adoption of a T-shaped cable to be connected into the airplane, so that in-situ monitoring is realized under the condition that the normal work of a test object is not influenced; in addition, based on the technical scheme, the excitation signal can be generated, and ground simulation or emulation conditions are provided for the test object, so that the technical scheme can support various electrical environments when the test object works through ground simulation or emulation under the condition that an airplane airborne system is not disassembled, and simultaneously collects and processes the working signal of the test object in real time, so that in-situ fault detection is rapidly realized, the complex part disassembly and assembly procedures are avoided, and the time for detection and troubleshooting can be effectively shortened;
according to the technical scheme, the test strategy development is realized on the basis of the in-situ test development host, the extension of the test function is realized by replacing the daughter board of the function board, namely, software and hardware of the test equipment are all in a reconfigurable design, the function board at the corresponding test front end can be replaced according to the actual test task, the test strategy is developed, and the utilization rate of the test equipment is improved.
Example 2
The embodiment discloses an airborne system distributed in-situ test device, which is a preferred implementation scheme of the present invention, that is, in the distribution of the cascade networking structure in embodiment 1, the test interfaces of all the test front ends are connected together, all the test front ends are sequentially in communication connection from left to right through the communication interfaces and the cascade interfaces, and in every two adjacent test front ends, the cascade interface of the test front end on the left side is in communication connection with the communication interface of the test front end on the right side, and the communication interface of the test front end on the leftmost side is in communication connection with the control host, as shown in fig. 1.
The embodiment is particularly suitable for the situation that the test object is single, and when the test resource of one test front end cannot meet the test requirement, all the test front ends can complete the synchronous test of the test object, and the control host exchanges data with the leftmost test front end through the communication port, so that the excitation signal control and the test data display of the test main unit are realized.
Example 3
The embodiment discloses an airborne system distributed in-situ test device, which is a preferred embodiment of the present invention, that is, in the distributed networking structure of embodiment 1, the device further includes a network switch in communication connection with the control host, and communication interfaces of all test front ends are respectively in communication connection with the network switch, as shown in fig. 2.
The embodiment is particularly suitable for the situation that the test objects are not single and/or the test objects are widely distributed, all the test front ends are networked with the control host through the network switch, the control host sends the control instruction to each test front end, controls all the test front ends to perform one-to-one corresponding test on all the test objects, and then transmits the test data back to the control host through the LAN bus, so that the data processing, display and the like are realized.
Example 4
The embodiment discloses distributed in-situ test equipment for an airborne system, which is a preferred embodiment of the invention, that is, in embodiment 1, as shown in fig. 3, a packaging shell comprises a main shell, a front panel and a rear panel, wherein the main shell is in a hollow cuboid structure with two open ends; the front panel and the rear panel are respectively arranged at the openings at the two ends of the main shell and are respectively detachably and hermetically connected with the main shell; the test interface is arranged on the front panel, and the power supply access port, the communication interface and the cascade interface are arranged on the rear panel. Furthermore, an internal support with a board clamping groove is further arranged inside the packaging shell, and the functional board is inserted into the test mainboard through the board clamping groove of the internal support.
The embodiment specifically discloses a packaging shell with an optimal structure, which ensures the strength and the sealing property of the packaging shell under the condition of detachable components, and each interface is arranged on a detachable front panel and a detachable rear panel, so that the maintenance of test equipment is facilitated. In addition, through setting up inside support, but ensure the stability of function integrated circuit board and test mainboard connection, further ensured the reliability under this technical scheme user state.
Example 5
The embodiment discloses a distributed in-situ test method for an airborne system, which is used as a basic implementation scheme of the invention and comprises the following steps:
s1, designing or selecting a special daughter card according to a required test function, and enabling the daughter card to be accessed into a carrier card to form a function board card;
s2, inserting a sufficient number of functional board cards into the test mainboard under the condition of ensuring that each interface of the functional board cards corresponds to the relevant component of the test mainboard;
s3, connecting a plurality of test front ends in the test main unit according to the test requirements;
s4, sequentially carrying out communication connection on the in-situ test development host, the control host and the connected test main unit;
and S5, connecting the test object to a test interface on the packaging shell, connecting an external power supply through a power interface on the packaging shell, and then entering a test flow.
Example 5
The embodiment discloses a distributed in-situ test method for an airborne system, which is a preferred embodiment of the invention, namely, in step S3 of embodiment 4, when a test object is single and a test resource of a test front end cannot meet a test requirement, a plurality of test front ends are connected according to a distribution form of a cascade networking structure; and when the test objects are not single and/or the test objects are widely distributed, connecting the plurality of test front ends according to the distribution of the distributed networking structure.
In actual use, cascade networking or decentralized networking can be selected according to the actual situation of a test object, test tasks with multiple test objects, wide test object distribution and multiple test resource requirements of a single test object are met, a T-shaped cable is used for being connected into an airplane before testing, test equipment can be connected into a test product without influencing normal work of the test product, and therefore in-situ monitoring is achieved.
Example 6
The embodiment discloses a distributed in-situ test method for an airborne system, which is a preferred implementation scheme of the invention, namely in step S5 of embodiment 4, a test flow comprises signal distribution, 422 bus signal processing and non-422 bus signal processing;
signal distribution, introducing a tested signal of a test object into a signal transfer module through a test interface, wherein the tested signal comprises a 422 bus signal and a non 422 bus signal; distributing the tested signals by using a signal transfer module, sending 422 bus signals to an RS422 bus communication module, and sending non-422 bus signals to a test board card through a test/excitation signal interface;
422 bus signal processing, namely converting 422 bus signals into LAN bus signals by using an RS422 bus communication module, transmitting the LAN bus signals to a control host by using an Ethernet switch, transmitting new LAN bus signals after the control host receives the LAN bus signals, transmitting the new LAN bus signals back to the RS422 bus communication module by using the Ethernet switch, converting the new LAN bus signals into new 422 bus signals by using the RS422 bus communication module, and transmitting the new 422 bus signals back to a test object by using a signal transfer module;
and (3) non-422 bus signal processing, testing the non-422 bus signal by using a test board card, and sending a test result to the control host through the Ethernet switch based on the LAN bus.
Furthermore, before signal distribution, the method also comprises the steps of synchronizing the clocks of each test front end and the control host by utilizing a synchronous time service module based on the LAN bus, and simultaneously carrying out time service on each functional board card in the test front end so as to ensure the synchronism of signal acquisition time.
Claims (8)
1. The distributed in-situ test equipment of the airborne system is characterized in that: the in-situ test system comprises an in-situ test development host, a control host and a test main unit which are sequentially in communication connection, wherein the test main unit comprises a plurality of test front ends, all the test front ends are matched to be distributed in a cascade networking structure or a disperse networking structure, the test front ends comprise a packaging shell, a test mainboard and a plurality of function board cards, and the test mainboard and all the function board cards are arranged inside the packaging shell;
the test mainboard is integrated with a power conversion module, an Ethernet switch, a synchronous time service module, an RS422 bus communication module and a signal transfer module; the signal switching module is in communication connection with the Ethernet switch through an RS422 bus communication module, and the synchronous time service module is in communication connection with the Ethernet switch;
the packaging shell is provided with a power supply access port electrically connected with the power supply conversion module, a test interface in communication connection with the signal conversion module, and a cascade interface and a communication interface which are in communication connection with the Ethernet switch respectively;
the functional board card comprises a carrier board and a daughter board; the carrier plate is integrated with an external connector X1, a first sub-board connector J1, a second sub-board connector J2, an FPGA module, a DC _ DC power supply and an Ethernet interface module; the external connector X1 is used as an interface of the functional board card and the test mainboard and comprises a communication interface unit, a test/excitation signal interface used for connecting a signal switching module and a power interface used for connecting a power conversion module, wherein the communication interface unit comprises a UART interface, a LAN interface used for connecting an Ethernet switch and a PPS interface used for connecting a synchronous time service module; the testing/exciting signal interface is in communication connection with the first sub-board connector J1, the power interface is electrically connected with the DC _ DC power supply, the LAN interface is in communication connection with the FPGA module through the Ethernet interface module, and the UART interface, the PPS interface and the second sub-board connector J2 are in communication connection with the FPGA module respectively; the daughter board integrates a functional circuit, a first carrier board connector P1 for connecting with the first daughter board connector J1 and a second carrier board connector P2 for connecting with the second daughter board connector J2;
based on the structure of the distributed in-situ test equipment, the test flow of the distributed in-situ test equipment comprises signal distribution, 422 bus signal processing and non-422 bus signal processing;
the signal distribution is to introduce a tested signal of a test object into a signal transfer module through a test interface, wherein the tested signal comprises a 422 bus signal and a non-422 bus signal; distributing the tested signals by using a signal transfer module, sending 422 bus signals to an RS422 bus communication module, and sending non-422 bus signals to a test board card through a test/excitation signal interface;
the 422 bus signal processing comprises the steps of converting a 422 bus signal into a LAN bus signal by using an RS422 bus communication module, sending the LAN bus signal to a control host by using an Ethernet switch, sending a new LAN bus signal after the control host receives the LAN bus signal, transmitting the new LAN bus signal back to the RS422 bus communication module by using the Ethernet switch, converting the new LAN bus signal into a new 422 bus property feedback signal by using the RS422 bus communication module, transmitting the new 422 bus property feedback signal back to a test object by using a signal switching module, and judging whether the communication between the test object and the test equipment is normal or not in real time according to the 422 bus property feedback signal;
and the non-422 bus signal processing is to test the non-422 bus signal by using the test board card and send a test result to the control host through the Ethernet switch based on the LAN bus.
2. The airborne system distributed in-situ test apparatus of claim 1, wherein: in the distribution of the cascade networking structure, the test interfaces of all the test front ends are connected together, all the test front ends are sequentially in communication connection from left to right through the communication interfaces and the cascade interfaces, in every two adjacent test front ends, the cascade interface at the left test front end is in communication connection with the communication interface at the right test front end, and the communication interface at the leftmost test front end is in communication connection with the control host.
3. The airborne system distributed in-situ test apparatus of claim 1, wherein: the distributed networking structure further comprises a network switch in communication connection with the control host, and the communication interfaces of all the testing front ends are in communication connection with the network switch respectively.
4. The distributed in-situ test equipment for airborne systems of claim 1, wherein: the packaging shell comprises a main shell, a front panel and a rear panel, wherein the main shell is of a hollow cuboid structure with two open ends; the front panel and the rear panel are respectively arranged at the openings at the two ends of the main shell and are respectively detachably and hermetically connected with the main shell; the test interface is arranged on the front panel, and the power supply access port, the communication interface and the cascade interface are arranged on the rear panel.
5. The airborne system distributed in-situ test apparatus of claim 1, wherein: the inside inner support that has the board draw-in groove that has still set up of encapsulation shell, the test mainboard is inserted through the board draw-in groove of inner support to the function integrated circuit board.
6. An airborne system distributed in-situ test method, characterized in that an airborne system distributed in-situ test apparatus according to any one of claims 1-5 is used, comprising the following steps:
s1, designing or selecting a special daughter card according to a required test function, and enabling the daughter card to be accessed into a carrier card to form a function board card;
s2, inserting a sufficient number of functional board cards into the test mainboard under the condition of ensuring that each interface of the functional board cards corresponds to the relevant component parts of the test mainboard;
s3, connecting a plurality of test front ends in the test main unit according to test requirements;
s4, sequentially carrying out communication connection on the in-situ test development host, the control host and the connected test main unit;
and S5, connecting the test object to a test interface on the packaging shell, connecting the test object to an external power supply through a power interface on the packaging shell, and then entering a test flow.
7. The distributed in-situ test method for an airborne system of claim 6, wherein: in the step S3, under the condition that the test object is single and the test resource of one test front end cannot meet the test requirement, connecting a plurality of test front ends according to the distribution form of the cascade networking structure; and when the test objects are not single and/or the test objects are widely distributed, connecting the plurality of test front ends according to the distribution of the distributed networking structure.
8. The distributed in-situ testing method for the airborne system of claim 7, wherein: in the test process of S5, before signal distribution, a synchronous time service module is used to synchronize clocks of each test front end and the control host based on the LAN bus, and time service is performed on each functional board in the test front end to ensure synchronization of signal acquisition time.
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| JP4575318B2 (en) * | 2006-03-09 | 2010-11-04 | 株式会社東芝 | Base station, radio terminal and radio communication method |
| EP1998275A1 (en) * | 2007-05-02 | 2008-12-03 | Power Digital Card Co., Ltd. | Card structure |
| KR20100041515A (en) * | 2008-10-14 | 2010-04-22 | 삼성전자주식회사 | Method for testing a solid state drive having a removable auxiliary test terminals |
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| CN103257910B (en) * | 2013-04-26 | 2016-08-03 | 北京航空航天大学 | Can be used for the embedded reconfigurable general-utility test platform of LXI of on-the-spot test |
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