An automated test bench for enhanced displays in an aircraft cockpit

Abstract

The application relates to an automatic test testbed for an enhanced display in an aircraft cockpit, which comprises a 4U case, a switch board card, a power supply board card, a network port to RS485 module, an RS232 module and at least two matrix board cards are integrated in the 4U case, a switch, an indicator light, a test hole and a plurality of connectors are arranged on the front shell of the 4U case, wherein the plurality of connectors comprise a connector J1, J1-3, J1-4 and J1-5 jack, the application simulates the equipment connected with the EDU725 enhanced display, mainly simulates the RS232 to send the flight control parameter signal; so as to realize that the EDU725 enhanced display displays the PFD image, and the internal parameters of the PFD image change in cycles, and the purpose of test is achieved.

Description

Technical Field

[0001] This application relates to the technical field of civil aviation maintenance and control, and in particular to an automatic test bench for an in-flight augmentation display in an aircraft cockpit. Background Technology

[0002] The EDU725 Enhanced Display is an active-matrix color liquid crystal display device. The EDU725 is part of the Enhanced Electronic Instrument System (EEIS). The EDU725 performs image and video display functions. Its primary function is to provide the Captain (CAPT) and First Officer (F / O) with a main display for navigation guidance and to monitor engine and system parameters. The EDU725 is an intelligent display component; there are six units in the aircraft cockpit. It has the processing capabilities to calculate and display the Primary Flight Display (PFD), Navigation Display (ND), Engine Warning Display (EWD), System Display (SD), and video images required for flight. The Primary Flight Display (PFD) is the primary focus of the pilots' attention during flight, mainly displaying the aircraft's airspeed, attitude, altitude, and air pressure. Therefore, if the EDU725 malfunctions, other signal images may disappear, but the PFD image must not be lost. When the EDU725 augmented display showing the PFD malfunctions, the PFD image will be displayed on other EDU725 augmented displays. Currently, apart from THALES, there is almost no repair work for the EDU725 augmented display in China, and there are very few inventions of interactive devices for the EDU725 augmented display. Almost all of them rely on imported automated test benches, resulting in high costs and maintenance expenses. The EDU725 augmented display is tested using the comprehensive ATEC Series 6 automated test bench specially developed by Spherea. The ATEC Series 6 automated test bench is characterized by its ability to test a wide variety of airborne components. By purchasing this automated test bench, the company has been able to test various airborne components, including the EDU725 augmented display.

[0003] Because the company repairs a wide variety of airborne components, and only has one ATEC (Automatic Test Chamber) system, it cannot simultaneously meet the testing needs of multiple different airborne components. Each component needs to be tested individually, requiring queuing and waiting. To ensure the reliability of the repaired components, each airborne device needs to undergo testing. However, this testing phase is time-consuming, and each component occupies a significant amount of time on the ATEC system, thus affecting the progress of other components in the queue and reducing repair efficiency. The EDU725 enhanced display receives a consistently high number of repair requests in the industry. To meet the testing demands, a test bench for the EDU725 enhanced display in the aircraft cockpit needs to be manufactured to increase delivery volume and shorten the testing queue time for other repaired components.

[0004] Therefore, those skilled in the art have provided an automated test bench for augmented display systems in aircraft cockpits to address the problems mentioned in the background art. Utility Model Content

[0005] To address the problems mentioned in the background art, this application provides an automated test bench for an enhanced display in an aircraft cockpit.

[0006] The automatic test bench for in-flight augmented display in aircraft cockpits provided in this application adopts the following technical solution:

[0007] It includes a 4U chassis, which integrates a switch board, a power supply board, a network port to RS485 module, an RS232 module, and at least two matrix boards.

[0008] Furthermore, the front shell of the 4U chassis is equipped with a switch, indicator light, test hole and multiple connectors, including connectors J1, J1-3, J1-4 and J1-5 sockets.

[0009] Furthermore, both matrix boards are used to switch the line selection bus position of the same pin. One matrix board is connected to the high and low ends of the multimeter through the J1A_1 / 2 pin and the 4 / 15 pin, while the other matrix board is connected to the pin of the enhanced display. The two matrix boards are connected to each other through an 8-way bus.

[0010] Furthermore, the switch board is used to turn on the discrete pins of the augmented display. It is connected to the external power supply GND through the J3A_1 / 4 / 7 pin and J3B_1 pin of the power supply board, and the other pins of the switch board are connected to the discrete pins of the augmented display.

[0011] Furthermore, the power supply board is used to connect to a relevant external power source.

[0012] Furthermore, the Ethernet-to-RS485 module interacts and communicates with the computer to control the internal circuit boards of the test bench. By communicating with the Ethernet-to-RS485 module through the computer's Ethernet port, the information from the RS485 module can be output to control the internal relay circuit boards.

[0013] Furthermore, the RS232 module is used by the interactive computer to send RS232 information data, and is connected to the augmented display via a direct connection through an internal wiring harness.

[0014] Furthermore, the switch circuit board is formed by interconnecting 56 relay switch pins using two D-SUB25 connectors.

[0015] Furthermore, the matrix board has 8 buses and 40 branches, which form a mesh structure.

[0016] In summary, this application includes the following beneficial technical effects:

[0017] 1. In this application, the test points of the EDU725 augmented display are introduced into the test bench, and different functional tests are performed by switching the internal boards in the test bench. A matrix board is used to switch the bus position of the same pin. One matrix board connects to the high and low ends of a multimeter via pins J1A_1 / 2 and 4 / 15, and another matrix board connects to some pins of the EDU725 augmented display itself. The two boards are interconnected via an 8-way bus, and relay switching ultimately achieves the measurement of voltages on certain pins of the EDU725 augmented display. A switch board is used to connect the discrete pins of the EDU725 augmented display. It connects to the external power supply GND via pins J3A_1 / 4 / 7 and J3B_1, and other pins connect to the discrete pins of the EDU725 augmented display. Controlling the on / off state of certain relays enables the selection of certain discrete pins to ground. A power supply board is used to connect the relevant external power supply via J5A... Pins 1 / 4 and 5 / 18 are connected to the high and low ends of an external 28V power supply. Pins J5A_2 and 6 are connected to the high and low ends of the power input of the EDU725 enhanced display. A relay switches between these two power inputs to achieve 28VDC power. Pins J5B_1 / 4 and 5 / 18 are connected to the high and low ends of an external 115V power supply. Pins J5A_2 and 6 are connected to the high and low ends of the power input of the EDU725 enhanced display. A relay switches between these two power inputs to achieve 115VAC power. The RS232 module is used to send RS232 information data to the interactive computer and is directly connected to the EDU725 enhanced display via internal wiring. The Ethernet-to-RS485 module allows the interactive computer to communicate with the test bench and control the internal boards of the test bench. The computer communicates with the Ethernet-to-RS485 module via its Ethernet port, outputting RS485 information to control the internal relay boards. This allows the application to simulate RS232 transmission of flight control parameter signals, thereby enabling the EDU725 enhanced display to show PFD images, with the internal parameters of the PFD images changing cyclically, thus achieving the testing objective. Attached Figure Description

[0018] Figure 1 This is a physical front panel drawing of the object in this application;

[0019] Figure 2 This is a physical rear panel diagram of the object in this application;

[0020] Figure 3 This is a schematic diagram showing the connection between the automatic test bench and the EDU725 enhanced display of this application;

[0021] Figure 4 This is the circuit diagram of the switch board in this application;

[0022] Figure 5 This is the circuit diagram of the matrix board in this application;

[0023] Figure 6 This is a block diagram of the overall wiring principle of this application;

[0024] Figure 7 This is a block diagram illustrating the wiring principles of the matrix board, switch board, and power supply board of this application.

[0025] Figure 8 This is a schematic diagram of the test points for the EDU725 enhanced display of this application;

[0026] Figure 9 This is a schematic diagram of the main control module of the matrix board in this application;

[0027] Figure 10 This is a schematic diagram of the relay control terminal of the matrix board in this application. Figure 1 ;

[0028] Figure 11 This is a schematic diagram of the relay control terminal of the matrix board in this application. Figure 2 ;

[0029] Figure 12 This is a schematic diagram of the relay selection terminal of the matrix board in this application;

[0030] Figure 13 This is a schematic diagram of the main control module of the switch board in this application;

[0031] Figure 14 This is a schematic diagram of the relay control terminal of the switch board in this application. Figure 1 ;

[0032] Figure 15 This is a schematic diagram of the relay control terminal of the switch board in this application. Figure 2 ;

[0033] Figure 16 This is a schematic diagram of the relay selection terminal of the switch board in this application;

[0034] Figure 17 This is a schematic diagram of the main control module of the power supply board in this application;

[0035] Figure 18 This is a schematic diagram of the relay control terminal and the strobe terminal of the power supply board of this application;

[0036] Figure 19 This is a schematic diagram of the Ethernet to RS485 converter module of this application;

[0037] Figure 20This is a front view of the panel in this application;

[0038] Figure 21 This is a processing drawing of the back of the panel in this application;

[0039] Figure 22 This is the EDU725 enhanced display described in this application. Detailed Implementation

[0040] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0041] In one embodiment, refer to Figures 1 to 22 As shown, this application discloses an automatic test bench for an augmented display in an aircraft cockpit, which is used to perform functional tests on the EDU725 augmented display. It includes a 4U chassis, and the 4U chassis integrates (installs) a switch board, a power board, a network port to RS485 module, an RS232 module, and at least two matrix boards.

[0042] In one embodiment, such as Figure 1 and Figure 2 As shown, the front panel of the 4U chassis is equipped with a switch, indicator lights, test holes, and multiple connectors. These connectors include connector J1 (main connector), J1-3, J1-4, and J1-5 sockets (spare). Connector J1 is used to connect the EDU725 augmented reality display. This application utilizes the test points of the EDU725 augmented reality display (such as...) Figure 8 The selected pins are introduced into the test bench, allowing different functional tests to be performed by switching the internal boards of the test bench.

[0043] In one embodiment, two matrix boards are used to switch the line selection bus position of the same pin. One matrix board is connected to the high and low ends of a multimeter via pins J1A_1 / 2 and 4 / 15, while the other matrix board is connected to the pins of the EDU725 augmented display. The two matrix boards are interconnected via an 8-way bus. Relay switching ultimately enables the measurement of certain pin voltages on the EDU725 augmented display. For example, when the high end (HI) of one multimeter (DMM) is connected to branches 1 and 2, and the low end (LO) is connected to branches 14 and 15, the high end of the multimeter is switched via relays K1, K2, K3, and K4. All low-level measurement terminals can be connected to these 8 buses; the high-end (HI) output of the other power supply is connected to branch line 16, and the low-end (LO) is connected to line 4; then, you can first turn on relays K5 and K7 on the board connected to the power supply, with the low-end (LO) of the power supply connected to bus 3 and the high-end (HI) connected to bus 2; the board connected to the multimeter will turn on relays K1 and K2, with the high-end (HI) of the multimeter using bus 1 and 3, and the low-end (LO) using bus 2 and 4; in order to connect the high-end of the power supply and the high-end of the multimeter together, and the low-end to the low-end together, the lines need to be switched, turning on relays K42 and K47, and finally using bus 1 and 4 to measure the voltage value;

[0044] In one embodiment, a switch board is used to connect discrete pins of the EDU725 augmented reality display. It connects to the external power supply GND via pins J3A_1 / 4 / 7 and J3B_1 of the power supply board. Other pins of the switch board connect to discrete pins of the EDU725 augmented reality display. By controlling the on / off state of certain relays, certain discrete pins are selected to ground. For example, when information from an external PC acts on certain I / O pins of the FPGA, raising or lowering the I / O pin voltage, raising the voltage level on the I / O pin of L1 will turn on the collector and emitter of the NPN transistor 2N3904, thus connecting the 5V power supply to relay K1 and energizing the relay switch. One end of the relay is connected to GND, and the other end is connected to the discrete pin, thereby achieving ground selection.

[0045] In one embodiment, the power supply board is used to connect to the relevant external power supply. The high and low terminals of an external 28V power supply are connected via pins J5A 1 / 4 and 5 / 18, and pins J5A_2 and 6 are connected to the high and low power input of the EDU725 enhanced display. A relay switches between these terminals to achieve a 28VDC power input. Alternatively, the high and low terminals of an external 115V power supply are connected via pins J5B_1 / 4 and 5 / 18, and pins J5A_2 and 6 are connected to the high and low power input of the EDU725 enhanced display. A relay switches between these terminals to achieve a 115VAC power input.

[0046] In one embodiment, the Ethernet to RS485 module interacts and communicates with the computer to control the internal circuit boards of the test bench. By communicating with the Ethernet to RS485 module through the computer's Ethernet port, the RS485 module can output information to control the internal relay circuit boards.

[0047] In one embodiment, the RS232 module is used to send RS232 information data to the interactive computer and is connected to the EDU725 enhanced display via a direct connection of internal wiring harness.

[0048] In one embodiment, the switch circuit board is formed by interconnecting 56 relay switch pins using two D-SUB25 connectors.

[0049] In one embodiment, the matrix board has 8 buses and 40 branches, which together form a mesh structure.

[0050] It should be noted that the internal circuit design of the automatic test bench in this application is as follows:

[0051] This system integrates at least two matrix boards, switch boards, power supply boards, RS232 modules, and Ethernet-to-RS485 modules into a standard 4U chassis. It is designed with external device interfaces, requiring only the connection of individual test equipment, a computer, and a power supply (mains power). The computer communicates with the 4U chassis via the Ethernet-to-RS485 module and connects to external devices via relevant connectors. Internally, the CPU (EP1C6Q240C8N) of each board outputs discrete levels to transistors to control various relays, thereby enabling the control of a few endpoints to operate thousands of test points.

[0052] Connector mating is as follows:

[0053] The automatic test bench of this application simulates the connection of components on an aircraft. It connects to the components through positioning pins and professional connectors that match the components, providing a good environment for component testing, ensuring the stability and safety of signals and power supply, and reducing damage to maintenance engineers and components.

[0054] The switch board is designed as follows:

[0055] A switching circuit board is formed by interconnecting 56 relay switch pins using two D-SUB25 connectors, such as... Figure 4As shown, the interconnection method involves connecting six relays to a common port (COM1), then distributing them one by one. After the last relay K6 is turned on, it is connected to the second common port (COM2). Subsequently, a relay (K7, K8) is connected between two relays, and so on, resulting in a total of eight identical connection methods. This interconnection method is designed to allow multiple different pins to be connected to the same power supply or ground. The purpose of this relay-based switch board is to allow multiple pins with the same definition to be connected to the same location, facilitating test setup. During testing, an external power supply needs to be introduced into the component, requiring the discrete pins of the component to be connected to the low end, and the component will only start if it is configured correctly. At this time, the relay switch board can quickly switch levels without manual configuration and can simultaneously turn multiple switches on or off, reducing the delay drawbacks of manual switches.

[0056] The matrix board is designed as follows:

[0057] The main design idea of ​​the matrix board is to use at least two identical boards to achieve the measurement purpose. The matrix board circuit mainly consists of 8 buses and 40 branches forming a mesh structure. Relays control the switching of one of the 40 branches onto the bus, and the wire sequence on the 8 buses can be reversed in pairs by relays to prevent negative values ​​from appearing during testing.

[0058] One matrix board connects to external multimeters (DMM), oscilloscopes (OSC), and other general-purpose devices, while another matrix board connects to the pins of components or the output pins of various power supplies. For example, when the high end (HI) of a multimeter (DMM) is connected to branches 1 and 2, and the low end (LO) is connected to branches 14 and 15, the high and low measurement terminals of the multimeter can be connected to these 8 buses by controlling relays K1, K2, K3, and K4. The other power supply output has its high-end (HI) connected to branch line 16 and its low-end (LO) connected to line 4. Therefore, you can first connect relays K5 and K7 on the board to which the power supply is connected. The low-end (LO) of the power supply is connected to bus line 3, and the high-end (HI) is connected to bus line 2. The board to which the multimeter is connected will activate relays K1 and K2. The high-end (HI) of the multimeter uses bus lines 1 and 3, and the low-end (LO) uses bus lines 2 and 4. To connect the high-end of the power supply to the high-end of the multimeter and the low-end to the low-end, the circuit needs to be switched by connecting relays K42 and K47. Finally, use bus lines 1 and 4 to measure the voltage value.

[0059] The implementation principle of the automatic test bench for in-flight augmented display in aircraft cockpit according to this application is as follows:

[0060] When in use, the EDU725 enhanced monitor test bench can be used according to... Figure 3 The internal connections and assembly are shown. Figure 6This is a block diagram of the overall wiring principle, used to connect the tester panel and the internal relay board; Figures 8 to 11 As a matrix board, the CPU control circuit of each board controls the relays on the relay board to open and close, thereby controlling the connection and disconnection between test points; Figures 12 to 15 As a switch board, the CPU control circuit controls the relays on the relay board to open and close, thereby controlling the connection and disconnection of discrete inputs and outputs and external devices. Figures 16 to 17 The power supply board, whose CPU control circuit controls the relays on the relay board to open and close, thereby controlling the connection and disconnection of the external power supply. Figure 18 For RS232 modules and Ethernet to RS485 modules; according to Figures 19 to 20 The drawings show the panel processing, and the hardware for the EDU725 enhanced monitor test bench can be manufactured using these drawings.

[0061] Furthermore, this application fills the gap in domestic independent research and development of testing and verification of EDU725 enhanced monitors, thereby effectively helping repair engineers to accurately locate the signal problems of EDU725 enhanced monitors in actual repairs, and thus make corresponding adjustments and repairs, greatly improving repair quality and efficiency.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An automated test bench for augmented reality displays in aircraft cockpits, comprising a 4U chassis, characterized in that, The 4U chassis integrates a switch board, a power supply board, a network port to RS485 module, an RS232 module, and at least two matrix boards.

2. The automatic test bench for an in-flight augmented display in an aircraft cockpit according to claim 1, characterized in that: The front shell of the 4U chassis is equipped with a switch, indicator light, test hole and multiple connectors, including connectors J1, J1-3, J1-4 and J1-5 sockets.

3. An automatic test bench for an in-flight augmented display in an aircraft cockpit according to claim 1, characterized in that: Both matrix boards are used to switch the line selection bus position of the same pin. One matrix board is connected to the high and low ends of the multimeter through the J1A_1 / 2 pin and the 4 / 15 pin, and the other matrix board is connected to the pin of the enhanced display. The two matrix boards are connected to each other through an 8-way bus.

4. An automatic test bench for an in-flight augmented display in an aircraft cockpit according to claim 1, characterized in that: The switch board is used to turn on the discrete pins of the augmented display. It is connected to the external power supply GND through the J3A_1 / 4 / 7 pin and J3B_1 pin of the power supply board. The other pins of the switch board are connected to the discrete pins of the augmented display.

5. An automatic test bench for an in-flight augmented display in an aircraft cockpit according to claim 1, characterized in that: The power board is used to connect to the relevant external power source.

6. An automatic test bench for an in-flight augmented display in an aircraft cockpit according to claim 1, characterized in that: The Ethernet-to-RS485 module interacts and communicates with the computer to control the internal circuit boards of the test bench. By communicating with the Ethernet-to-RS485 module through the computer's Ethernet port, the information from the RS485 module can be output to control the internal relay circuit boards.

7. An automatic test bench for an in-flight augmented display in an aircraft cockpit according to claim 1, characterized in that: The RS232 module is used by the interactive computer to send RS232 information data and is connected to the augmented display via a direct connection through an internal wiring harness.

8. An automatic test bench for an in-flight augmented display in an aircraft cockpit according to claim 1, characterized in that: The switch circuit board is formed by interconnecting 56 relay switch pins using two D-SUB25 connectors.

9. An automatic test bench for an in-flight augmented display in an aircraft cockpit according to claim 1, characterized in that: The matrix board has 8 buses and 40 branches, which form a mesh structure.

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