Spoiler and elevator computer automatic test board

Abstract

The invention belongs to the technical field of measurement and control, and discloses a spoiler and elevator computer automatic test board, which comprises a main connector module, a power supply control module, a test interface module, a relay switch and matrix board card module, a communication board card module, an ARINC 429 board card module and a main control module. According to the invention, a set of automatic test system for SEC is innovatively designed, and all test pins of the SEC are efficiently connected to the interior of the automatic test bench through the special test interface module, so that the connection process with a component to be tested, test equipment and an industrial personal computer is greatly simplified, the power supply control module is greatly simplified, and the test efficiency is improved. According to the system, diversified demand integration of power supply is realized, all power supply requirements of an SEC test and a board card in a test board can be met only by externally connecting 220V mains supply, human errors and communication board card module functions possibly caused by complex connection are effectively avoided, and a universal serial data interface is used.

Description

Technical Field

[0001] This invention belongs to the field of measurement and control technology, specifically a computer-automated test bench for spoilers and elevators. Background Technology

[0002] The Spoiler and Elevator Computer (SEC), as a core subsystem of the automatic flight system, belongs to the Flight Management and Guidance System (FMGS) and undertakes multiple critical tasks. Its functions include receiving pilot stick commands, accurately calculating the control strategy for the spoiler and elevator, reconfiguring and engaging actuators after a failure, servo control, powering actuator sensors, the Built-in Test Equipment (BITE) function, data loading, pin programming, and Power-On Self-Test (POST). Summary of the Invention

[0003] The purpose of this invention is to provide an automated computer test bench for spoilers and elevators to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an automatic computer test bench for spoilers and elevators, the test bench including a main connector module, a power control module, a test interface module, a relay switch and matrix board module, a communication board module, an ARINC 429 board module, and a main control module.

[0005] Preferably, the main connector module includes a connector interface unit, a signal transmission unit, a power supply unit, a grounding and shielding unit, a connection detection and protection unit, and a control and communication unit;

[0006] The control and communication unit and connector interface unit consist of connectors J1 and J2. J1 and J2 are the core of the physical connection, responsible for accurately aligning the SEC pins with the automatic test bench interface. The contact point design ensures reliable signal transmission, durability, and corrosion resistance. The positioning mechanism ensures accurate alignment when the connector is plugged in or removed, preventing pin damage or poor connection.

[0007] The signal transmission unit transmits various types of signals, including power lines, data lines, and control lines, between connectors J1 and J2 via a signal harness.

[0008] The power supply unit includes power pins in the connector and a power management module inside the automatic test bench. The power pins are specifically designed to provide the required power voltage to the SEC, while the power management module is responsible for converting the externally input power into the DC voltage required by the SEC and providing it to the SEC stably and safely through connector J1 or J2.

[0009] The grounding and shielding unit includes a grounding pin in the connector and a shield outside the signal harness; the grounding pin ensures that the signal reference potential is consistent and reduces interference; the shielding layer effectively resists external electromagnetic field interference.

[0010] The connection detection and protection unit integrates a connection detection circuit and an overcurrent protection device. The connection detection circuit monitors the connection status of connectors J1 and J2 and alarms when there is a problem.

[0011] The control and communication unit integrates control signal lines and a communication interface. The control signal lines are responsible for the test status and mode switching functions of the SEC.

[0012] Preferably, the power control module refers to an externally connected 220V AC mains power supply that efficiently converts electrical energy into the operating power required by the internal circuit boards and SEC of the test bench using a built-in power board.

[0013] Preferably, the test interface module includes a dedicated test interface unit, a signal transmission and reception unit, an interface protection unit, and a connection stability and reliability unit;

[0014] The dedicated test interface unit is carefully designed with customized interfaces that meet the specifications and testing requirements of the component under test (e.g., SEC). These interfaces come in various forms, including sockets, slots, and terminals, and are designed to ensure that the test connection with the component under test, test equipment, and industrial computer is convenient, efficient, stable, and reliable.

[0015] The signal transmission and reception unit is responsible for the accurate transmission and reception of test signals, ensuring the integrity and accuracy of data during the test process. It includes signal amplification, filtering, and isolation circuits to improve the signal's anti-interference capability and transmission quality.

[0016] The interface protection unit is equipped with protection measures at the test interface, including overcurrent protection and short circuit protection, to prevent damage to the interface or test equipment due to unexpected situations during the test.

[0017] The connection stability and reliability unit is dedicated to ensuring the stability and reliability of the connection between the test interface and the component under test, test equipment and industrial control computer. By adopting locking mechanism and anti-detachment design technology, it effectively avoids test errors and failures caused by loose or poor connection, and ensures the smooth progress of the test process and the accuracy of the results.

[0018] Preferably, the relay switch and matrix board module includes a control unit, a relay switch array, a signal transmission and isolation unit, a bus interface unit, a matrix switch network, a control logic unit, and an expansion and compatibility unit;

[0019] The control unit is responsible for receiving instructions from the test system or industrial control computer and precisely controlling the relay switches; the relay switch array is configured with a corresponding number of relay switches according to the number of pins of the SEC and the test requirements to realize the test control of the SEC pins; the signal transmission and isolation unit ensures that the test signal is accurately and safely transmitted between the relay switch board and the SEC to avoid signal interference or damage.

[0020] The bus interface unit connects to the test equipment via a bus (such as the ABUS bus) to achieve high-speed and stable data transmission. The matrix switch network consists of multiple relays, which control the conduction sequence of ports on each bus, optimizing test connections and reducing the number of relays. The control logic unit presets control logic according to test requirements to ensure that the matrix switch network can conduct ports in a predetermined order to complete the test task. The expansion and compatibility unit is designed with expansion interfaces and compatibility logic to connect with other test boards or systems, improving the flexibility and versatility of the test system.

[0021] Preferably, the communication board module includes a core communication unit and an auxiliary operation unit;

[0022] The core communication unit includes a serial data interface, an RS485 interface, and WLAN. The serial port is low-cost and suitable for long-distance communication; RS485 has a long transmission distance and high speed, and supports multiple nodes; WLAN realizes wireless data transmission through Wi-Fi, which is flexible and convenient, and suitable for the rapid deployment and mobility requirements in industrial automation testing.

[0023] The auxiliary operating unit includes a processor, memory, power management, and interface circuitry, which together support the efficient operation of the communication board module.

[0024] Preferably, the ARINC 429 board module includes a signal amplification unit and a level conversion unit;

[0025] The signal amplification unit uses an AD828 dual-channel video operational amplifier to amplify the ARINC 429 signal sent by the SEC to enhance the signal gain and output drive capability. The level conversion unit then sends the amplified ARINC 429 signal to an LM219D precision high-speed dual-channel comparator. This unit is responsible for level conversion to ensure that the output signal is a TTL level that the master control module can recognize.

[0026] Preferably, the main control module includes an FPGA core control unit, a physical address configuration unit, a clock circuit unit, and a power management unit;

[0027] The FPGA core control unit, based on a field-programmable logic array (FPGA), is responsible for the control and data processing functions of the entire test bench. This FPGA core control unit includes an FPGA configuration interface for programming and configuring the FPGA. The physical address configuration unit is responsible for assigning and configuring physical addresses to each component in the test bench, ensuring correct data transmission and processing. The clock circuit unit provides a stable clock signal, ensuring that all modules in the test bench can work synchronously, guaranteeing data accuracy and consistency. The power management unit is responsible for converting the input power into the DC voltage required by the test bench, providing a stable power supply to each module.

[0028] The beneficial effects of this invention are as follows:

[0029] 1. This invention innovatively designs an automated testing system for SEC (Test Components Under Test). This system efficiently connects all test pins of the SEC to the automated testing bench via a dedicated test interface module, greatly simplifying the connection process with the SEC, testing equipment, and industrial control computer. Regarding the power control module, the system integrates diverse power supply needs, requiring only an external 220V AC mains power supply to meet all power requirements of the SEC test and the internal boards of the testing bench, effectively avoiding human errors that may be caused by complex connections. The communication board module utilizes a universal serial data interface and is equipped with a shielded grounding design to ensure… The stability and anti-interference of data communication between the SEC and the automated test bench and peripherals, along with the professional connector docking scheme for the main control module, simulate the actual connection environment of aircraft components. Through positioning pins and professional connectors, a stable and safe testing environment is created for component testing, reducing potential damage to maintenance engineers and components. The design of relay switch boards and matrix boards, based on in-depth research into the pin definitions and testing procedures of spoilers and elevator computers, provides the necessary hardware support for inter-module connections during the SEC testing process. The collaborative work of the main control module and the relay switch module further enhances the flexibility and reliability of the test. Attached Figure Description

[0030] Figure 1 This is a test block diagram of the present invention;

[0031] Figure 2 This is a block diagram of the relay switch board and matrix board of the present invention;

[0032] Figure 3 The interface circuit diagram for the active mode (AS) configuration of this invention;

[0033] Figure 4 This is a diagram of the JTAG interface of the present invention;

[0034] Figure 5 This is a diagram showing the physical address configuration of the present invention;

[0035] Figure 6 This is the clock circuit diagram of the present invention;

[0036] Figure 7 This is a diagram of the DC-DC conversion of the present invention;

[0037] Figure 8 This is a diagram of the RS48 / WLAN of the present invention;

[0038] Figure 9 This is a diagram of a single relay switch module of the present invention;

[0039] Figure 10 This is a block diagram of the relay matrix board of the present invention;

[0040] Figure 11 This is a schematic diagram of the relay switch matrix of the present invention;

[0041] Figure 12 This is a block diagram of the ARINC 429 board of the present invention;

[0042] Figure 13 This is a diagram of the ARINC 429 receiver module of the present invention;

[0043] Figure 14 This is a front panel view of the present invention;

[0044] Figure 15 This is a rear panel view of the present invention;

[0045] Figure 16 This is an overall connection block diagram of the present invention;

[0046] Figure 17 This is the overall connection block diagram and pin definition diagram of the present invention;

[0047] Figure 18 This is a diagram of the ARINC 429 receiver module of the present invention;

[0048] Figure 19 This is a diagram showing the various interface connections of the present invention;

[0049] Figure 20 This is a schematic diagram of the relay board module of the present invention;

[0050] Figure 21 This is a schematic diagram of the relay switch board module of the present invention;

[0051] Figure 22 This is a schematic diagram of the relay matrix board module of the present invention;

[0052] Figure 23 This is a schematic diagram of the relay board module of the present invention;

[0053] Figure 24 This is a diagram of the main control module of the present invention;

[0054] Figure 25 This is a diagram of the power supply module of the present invention;

[0055] Figure 26 This is a front panel machining diagram of the present invention;

[0056] Figure 27 This is a machining diagram of the rear panel of the present invention. Detailed Implementation

[0057] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] like Figures 1 to 27 As shown, this embodiment of the invention provides an automated computer test bench for spoilers and elevators. The test bench includes a main connector module, a power control module, a test interface module, a relay switch and matrix board module, a communication board module, an ARINC 429 board module, and a main control module.

[0059] The main connector module is responsible for connecting the SEC (spoiler and elevator computer) under test to the automatic test bench. This connection process is achieved through the physical docking of connectors J1 and J2.

[0060] The power control module is responsible for connecting to the external 220V AC mains power and, through internal power board conversion, provides a stable and reliable power supply to the various boards in the test bench and the SEC (spoiler and elevator computer), thereby effectively avoiding human errors that may occur during complex connection processes. The test interface module is designed with a dedicated test interface, which is designed to facilitate test connections with the component under test, test equipment, and industrial control computer, ensuring that test signals can be transmitted and received accurately.

[0061] The relay switch and matrix board module integrates a relay switch board and a relay matrix board. The former is used for precise test control of the SEC pins, while the latter is connected to the test equipment via a bus, which can flexibly control the conduction sequence on each bus port. This not only effectively reduces the number of relays required, but also further optimizes the design of the test connection.

[0062] The communication board module is responsible for data communication between the industrial control computer and the automatic test bench, and may cover various communication methods such as serial data interface, RS485, and WLAN. This ensures accurate transmission of test data and rapid issuance of commands.

[0063] The ARINC 429 board module is designed specifically for receiving and processing ARINC 429 signals transmitted via SEC. It integrates an ARINC 429 receiver module, which first amplifies the signal using a dual-channel video operational amplifier, then performs level conversion through a precision high-speed dual-channel comparator, and finally outputs a TTL level signal that the main control module can interpret.

[0064] The main connector module includes a connector interface unit, a signal transmission unit, a power supply unit, a grounding and shielding unit, a connection detection and protection unit, and a control and communication unit.

[0065] The control and communication unit and connector interface unit consist of connectors J1 and J2. J1 and J2 are the core of the physical connection, responsible for accurately aligning the SEC pins with the automatic test bench interface. The contact point design ensures reliable signal transmission, durability, and corrosion resistance. The positioning mechanism ensures accurate alignment when the connector is plugged in or removed, preventing pin damage or poor connection.

[0066] The signal transmission unit transmits various types of signals, including power lines, data lines, and control lines, between connectors J1 and J2 via a signal harness. To ensure the accuracy and integrity of the signals, amplification or attenuation control may be required during transmission for weak or high-speed signals.

[0067] The power supply unit includes power pins in the connector and a power management module inside the automatic test bench. The power pins are specifically designed to provide the required power voltage to the SEC, while the power management module is responsible for converting the external power input (e.g., 220V AC mains power) into the DC voltage required by the SEC and providing it to the SEC stably and safely through connectors J1 or J2.

[0068] The grounding and shielding unit includes a grounding pin in the connector and a shield on the outside of the signal harness; the grounding pin ensures that the signal reference potential is consistent and reduces interference; the shielding layer effectively resists external electromagnetic field interference, ensuring the stability and purity of signal transmission, and providing strong support for the accuracy of the test system.

[0069] The connection detection and protection unit integrates a connection detection circuit and an overcurrent protection device. The connection detection circuit monitors the connection status of connectors J1 and J2 and alarms when there is a problem. The overcurrent protection device protects the power supply safety, prevents damage to the equipment from short circuits and other high currents, and ensures the stable operation of the test system.

[0070] The control and communication unit integrates control signal lines and a communication interface. The control signal lines are responsible for functions such as test status and mode switching of the SEC; the communication interface realizes data communication between the SEC and the automatic test bench, covering multiple methods such as serial, parallel, and network communication, to ensure the accurate transmission of test commands and data.

[0071] The connector module integrates multiple functions to ensure efficient and safe test connections. Precise connector interfaces ensure accurate and complete signal transmission, while a stable and reliable power supply guarantees reliable connections. Grounding and shielding units effectively resist interference, and connection detection and protection units monitor and protect equipment in real time. Control and communication units enable precise control and data communication, ensuring accurate transmission of test commands. The overall design optimizes the testing process, enhances system stability and security, and provides users with an efficient and convenient test connection solution, improving testing efficiency and accuracy.

[0072] The power control module refers to a device that connects to an external 220V AC power supply and efficiently converts electrical energy into the operating power required by the various boards and SEC (Safety Electronic Controller) within the test bench using its built-in power board. This design aims to ensure a stable and reliable power supply for the entire system, effectively simplifying the complex power connection process and significantly reducing the risk of connection errors caused by improper human operation. Through centralized management and power conversion, this device not only improves the overall operating efficiency of the system but also provides users with a more convenient and safer power management experience.

[0073] The power control module is ingeniously designed, efficiently converting 220V AC mains power to provide a stable and reliable power supply for all components within the test bench. This design simplifies the power connection process, reduces the risk of human error, and ensures stable system operation. Simultaneously, centralized management and power conversion improve overall operating efficiency, making power management more convenient and safer. The power control module not only enhances system reliability and safety but also optimizes the user experience, laying a solid foundation for an efficient and stable testing environment and making it an indispensable component of modern testing equipment.

[0074] The test interface module includes a dedicated test interface unit, a signal transmission and reception unit, an interface protection unit, and a connection stability and reliability unit.

[0075] The dedicated test interface unit is carefully designed with customized interfaces that meet the specifications and testing requirements of the component under test (e.g., SEC). These interfaces come in various forms, including sockets, slots, and terminals, and are designed to ensure that the test connection with the component under test, test equipment, and industrial computer is convenient, efficient, stable, and reliable.

[0076] The signal transmission and reception unit is responsible for the accurate transmission and reception of test signals, ensuring the integrity and accuracy of data during the test process. It includes circuits for signal amplification, filtering, and isolation to improve the signal's anti-interference capability and transmission quality.

[0077] The interface protection unit is equipped with protection measures at the test interface, including overcurrent protection and short circuit protection, to prevent damage to the interface or test equipment due to unexpected situations during the test.

[0078] The connection stability and reliability unit is dedicated to ensuring the stability and reliability of the connection between the test interface and the component under test, test equipment and industrial control computer. By adopting locking mechanism and anti-detachment design technology, it effectively avoids test errors and failures caused by loose or poor connection, and ensures the smooth progress of the test process and the accuracy of the results.

[0079] The test interface module integrates a dedicated interface, signal transmission, interface protection, and connection stability, significantly improving test efficiency. The dedicated test interface unit ensures convenient and efficient test connections; the signal transmission and reception unit guarantees data integrity and accuracy, and improves signal anti-interference capabilities; the interface protection unit incorporates multiple protection measures to prevent accidental damage; and the connection stability and reliability unit employs advanced technology to ensure a robust connection and avoid test errors. The overall design optimizes the test process, enhances test security and reliability, and improves the accuracy of test results, providing a solid guarantee for efficient and precise testing.

[0080] The relay switch and matrix board module includes a control unit, a relay switch array, a signal transmission and isolation unit, a bus interface unit, a matrix switch network, a control logic unit, and an expansion and compatibility unit.

[0081] The relay switch module;

[0082] The control unit is responsible for receiving instructions from the test system or industrial control computer and precisely controlling the relay switches; the relay switch array is configured with a corresponding number of relay switches according to the number of pins of the SEC and the test requirements to realize the test control of the SEC pins; the signal transmission and isolation unit ensures that the test signal is accurately and safely transmitted between the relay switch board and the SEC to avoid signal interference or damage.

[0083] The relay matrix board module;

[0084] The bus interface unit connects to the test equipment via a bus (such as the ABUS bus) to achieve high-speed and stable data transmission. The matrix switch network consists of multiple relays, which control the conduction sequence of ports on each bus, optimizing test connections and reducing the number of relays. The control logic unit presets control logic according to test requirements to ensure that the matrix switch network can conduct ports in a predetermined order to complete the test task. The expansion and compatibility unit is designed with expansion interfaces and compatibility logic to connect with other test boards or systems, improving the flexibility and versatility of the test system.

[0085] The relay switch and matrix board module integrates control, transmission, isolation, and matrix networking functions, significantly improving testing efficiency and flexibility. The control unit precisely controls the relay switches to achieve SEC pin testing; the signal transmission and isolation unit ensures safe signal transmission. The matrix board transmits data at high speed via a bus, and the matrix switch network optimizes test connections, reducing the use of relays. The control logic unit presets test procedures, and expansion and compatibility units enhance system flexibility. The overall design improves the automation level, testing accuracy, and compatibility of the test system, meeting diverse testing needs.

[0086] The communication board module includes a core communication unit and an auxiliary operation unit;

[0087] The core communication unit includes a serial data interface (serial port), an RS485 interface, and WLAN. The serial port is low-cost and suitable for long-distance communication; RS485 has a long transmission distance and high speed, and supports multiple nodes; WLAN realizes wireless data transmission through Wi-Fi, which is flexible and convenient, and suitable for the rapid deployment and mobility requirements in industrial automation testing.

[0088] The auxiliary operating unit includes a processor (processing data and executing protocols), a memory (storing protocol stacks and configuration information), a power management system (providing stable power), and interface circuits (connecting to industrial control computers, test benches, etc., including specific interfaces such as UART, SPI, I2C, RS485, and WLAN), which together support the efficient operation of the communication board module.

[0089] The communication board module integrates core communication and auxiliary operation units, offering significant advantages. The core communication unit combines serial port, RS485, and WLAN, balancing cost-effectiveness, long-distance high-speed transmission, and wireless flexibility to meet diverse communication needs. The auxiliary operation unit, centered on a processor and supplemented by memory, power management, and rich interface circuitry, ensures efficient data processing, accurate protocol execution, stable power supply, and wide connectivity, fully supporting the efficient and stable operation of the communication board module and improving the efficiency and flexibility of industrial automation testing.

[0090] The ARINC 429 board module includes a signal amplification unit and a level conversion unit;

[0091] The signal amplification unit uses an AD828 dual-channel video operational amplifier to amplify the ARINC 429 signal (including HI and LO signals) sent by the SEC to enhance signal gain and output drive capability. The level conversion unit then sends the amplified ARINC 429 signal to an LM219D precision high-speed dual-channel comparator. This unit is responsible for level conversion to ensure that the output signal is a TTL level that the master control module can recognize.

[0092] The ARINC 429 board module integrates signal amplification and level conversion functions, offering significant advantages. The signal amplification unit uses the AD828 dual-channel video operational amplifier, effectively enhancing the gain and output drive capability of the ARINC 429 signal transmitted by the SEC, ensuring signal quality. The level conversion unit uses the LM219D precision high-speed dual-channel comparator to accurately achieve level conversion, making the output signal compatible with the TTL level of the main control module, improving system compatibility. In summary, the ARINC 429 board module optimizes signal transmission and processing, enhances system stability and reliability, and improves overall performance.

[0093] The main control module includes an FPGA core control unit, a physical address configuration unit, a clock circuit unit, and a power management unit (DC-DC converter).

[0094] The FPGA core control unit, based on a field-programmable logic array (FPGA), is responsible for the control and data processing functions of the entire test bench. This unit includes an FPGA configuration interface for programming and configuring the FPGA. The physical address configuration unit is responsible for assigning and configuring physical addresses to each component in the test bench, ensuring correct data transmission and processing. The clock circuit unit provides a stable clock signal to ensure that each module in the test bench can work synchronously, guaranteeing data accuracy and consistency. The power management unit (DC-DC converter) is responsible for converting the input power into the DC voltage required by the test bench, providing a stable power supply to each module.

[0095] The main control module integrates an FPGA core control unit, physical address configuration, clock circuit, and power management unit, bringing significant benefits. The FPGA core control unit, with its field-programmable nature, flexibly enables comprehensive control and data processing of the test bench, improving system performance. Physical address configuration ensures accurate data transmission, enhancing system reliability. The clock circuit provides a stable clock signal, ensuring synchronized module operation and accurate data. The power management unit efficiently converts power, providing stable DC power to each module and ensuring stable system operation. In summary, the main control module design optimizes test bench control, data processing, and power management, improving overall performance and stability.

[0096] (This section describes the working principle and beneficial effects of the right of choice.)

[0097] The external components of this invention mainly include a main connector, power control, maintenance module, test interface, and power interface; the internal components mainly include relay switch boards, relay matrix boards, power supply boards, communication boards, ARINC 429 boards, and interconnect boards. (Reference test frame) Figure 1 All functional and performance tests of the SEC are automatically executed by a self-developed graphical visualization test software program within the industrial control computer. The industrial control computer communicates with test equipment such as multimeters, oscilloscopes, and signal generators via a wireless router or wired network port, and controls their mode switching, functions, and parameter settings through the test software. Simultaneously, the industrial control computer controls the automatic test bench via a communication board. The SEC under test is connected to the automatic test bench of this invention via connectors J1 and J2, and its pins and test equipment are controlled through relay matrix boards and switch boards. The automatic test bench is connected to 220V AC mains power, which is converted by an internal power supply board to power the various boards within the test bench and the SEC as required for operation.

[0098] This automated test bench, through the study of the spoiler and elevator computer pin definitions and test procedures, designs the relay switch board and matrix board circuits required in the SEC test process to facilitate the interconnection between various modules. The main control module + relay switch module design provides the necessary connection for testing.

[0099] like Figure 2 As shown;

[0100] The JTAG interface is an industry-standard interface primarily used for chip testing. Altera FPGAs support configuring the FPGA via JTAG commands, and can also be used in conjunction with a virtual logic analyzer for online timing observation. JTAG configuration interface circuitry, such as... Figure 4 As shown.

[0101] The JTAG interface is an industry-standard interface primarily used for chip testing. Altera FPGAs support configuring the FPGA via JTAG commands, and can also be used in conjunction with a virtual logic analyzer for online timing observation. JTAG configuration interface circuitry, such as... Figure 4 As shown.

[0102] The physical address configuration circuit mainly consists of two parts: an 8-bit DIP switch and a 10K pull-up resistor. A 3.3V pull-up resistor is added to the open pin of the DIP switch, and then connected to the physical address configuration I / O of the FPGA. The other end (closed pin) of the DIP switch is grounded.

[0103] By setting the switching state of each bit of the 8-bit DIP switch, the voltage value of the connected physical address configuration I / O terminal can be changed, thereby configuring the physical address of the switch module. When the DIP switch is in the off state, the off pin is approximately 3.3V, and the voltage of the physical address configuration I / O terminal is also approximately 3.3V, at which point the physical address is configured as "1". When the DIP switch is in the closed state, the off pin is pulled low to ground, and the voltage of the physical address configuration I / O terminal is approximately 0V, at which point the physical address is configured as "0". The schematic diagram of the physical address configuration circuit is shown below. Figure 5 As shown.

[0104] An FPGA requires a reference clock for normal operation, serving as a time reference for logic timing; it is indispensable in an FPGA system. In this design, a 3.3V active crystal oscillator with output frequencies of 50MHz and 10MHz is used as the reference clock for the main control module. Figure 6 .

[0105] The FPGA requires 3.3V and 1.5V voltages for normal operation. A DC-DC buck converter circuit is designed using the LM2596 buck chip to convert DC 5V to 3.3V; and a DC-DC buck converter circuit is designed using the AS1117-1.5 buck chip to convert 3.3V to 1.5V. For example... Figure 7 .

[0106] To enable data communication between the industrial control computer and the main control module, RS485 or WLAN is used for data interaction. After the FPGA receives communication data from the RS485 / WLAN, it decodes the functional and data fields, transmitting operation information, relay addresses and status information, and image information to the FPGA via the internal communication interface. The FPGA then performs subsequent functional operations. Figure 8 .

[0107] Relay switch module design:

[0108] A 2N3904 transistor is used as the command-controlled switch. When L1 is high, the transistor conducts, K1 is connected to ground, and K1 acts on the relay, thus energizing the 5V coil on the relay and energizing the switch. For example... Figure 9 .

[0109] The difference between relay switch boards and matrix boards lies in their connection method. Matrix boards connect to test equipment via a bus, while relay switches are arranged in a matrix, allowing for free control of the conduction sequence of ports on each bus. For example... Figure 10 As shown.

[0110] The principle of the switch matrix is ​​as follows Figure 11 As shown, when the number of pins to be tested is large, the number of relays can be reduced, and the number of component pins that need to be connected through a matrix can be reduced, and they can be directly connected in the adapter.

[0111] ARINC 429 board design

[0112] This automated test bench, through the study of the spoiler and elevator computer pin definitions, designed the ARINC 429 board circuit required for the SEC test process, including the main control module and ARINC 429 receiver module, providing the necessary connections for testing. Figure 12 As shown;

[0113] Main control module design:

[0114] Such as the main control module of relay switch boards and matrix boards.

[0115] ARINC 429 Receiver Module Design:

[0116] An AD828 dual-channel video operational amplifier is used to amplify the ARINC 429 signal (HI and LO signals) sent by the SEC, giving it higher gain and higher output drive capability. Then, an LM219D precision high-speed dual-channel comparator is used for level conversion to output a TTL level that the main control module can recognize. Figure 13 .

[0117] Figure 14 This is a front panel diagram of the automatic computer test bench for spoilers and elevators, which includes a main connector, test bench maintenance module, and power control.

[0118] Main connector: Connect to SEC via test cable.

[0119] Test bench maintenance module: Monitors the status of the automatic test bench as a backup function.

[0120] Power control: Used to control the 220V mains power switch, status indication, and overcurrent protection.

[0121] Figure 15 This is a diagram of the rear panel of the automatic computer test bench for spoilers and elevators, which is designed with a power interface, a test equipment interface, and power protection.

[0122] Power interface: Provides an external power supply connection.

[0123] Test equipment interface: Provides connection for devices such as industrial control computers, multimeters, and oscilloscopes.

[0124] Power supply protection: Used to provide overcurrent protection for the internal power supply of the circuit.

[0125] The spoiler and elevator computer-automated test bench can be used according to Figure 16-25 The diagram shows the internal connections and assembly, integrating all resources and interfaces together; according to... Figure 26 and 27 The drawings show the panel fabrication process, and these drawings can be used to complete the hardware fabrication of the spoiler and elevator computer-automated test bench.

[0126] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0127] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A computer-automated test bench for spoilers and elevators, characterized in that: The test bench includes a main connector module, a power control module, a test interface module, a relay switch and matrix board module, a communication board module, an ARINC 429 board module, and a main control module. The main connector module is responsible for connecting the SEC under test to the automatic test bench; the power control module is responsible for connecting to the external 220V AC mains power and, through internal power board conversion, provides a stable and reliable power supply to the various boards in the test bench and the SEC; the relay switch and matrix board module integrates a relay switch board and a relay matrix board, the former for precise test control of the SEC pins, and the latter for connection to the test equipment via a bus; the communication board module is responsible for data communication between the industrial control computer and the automatic test bench, covering serial data interface, RS485, and WLAN communication methods; the ARINC 429 board module is specifically designed for receiving and processing ARINC 429 signals transmitted by the SEC.

2. The automatic computer-controlled test bench for spoilers and elevators according to claim 1, characterized in that: The main connector module includes a connector interface unit, a signal transmission unit, a power supply unit, a grounding and shielding unit, a connection detection and protection unit, and a control and communication unit. The control and communication unit and connector interface unit consist of connectors J1 and J2, which are the core of the physical connection and are responsible for accurately aligning the SEC pins with the automatic test bench interface. The contact point design ensures reliable signal transmission. The signal transmission unit transmits various types of signals, including power lines, data lines, and control lines, between connectors J1 and J2 via a signal harness. The power supply unit includes power pins in the connectors and a power management module inside the automatic test bench. The power pins are specifically designed to provide the required power voltage to the SEC. The grounding and shielding unit includes grounding pins in the connectors and external shielding for the signal harness. The grounding pin ensures that the signal reference potential is consistent, reducing interference; the shielding layer effectively resists external electromagnetic field interference. The connection detection and protection unit integrates a connection detection circuit and an overcurrent protection device. The connection detection circuit monitors the connection status of connectors J1 and J2 and alarms when there is a problem. The control and communication unit integrates a control signal line and a communication interface. The control signal line is responsible for the test status and mode switching functions of SEC.

3. The automatic computer testing platform for spoilers and elevators according to claim 1, characterized in that: The power control module refers to the module that connects to an external 220V AC power supply and uses a built-in power board to efficiently convert electrical energy into the operating power required by the various boards and SEC inside the test bench.

4. The automatic computer-controlled test bench for spoilers and elevators according to claim 1, characterized in that: The test interface module includes a dedicated test interface unit, a signal transmission and reception unit, an interface protection unit, and a connection stability and reliability unit. The dedicated test interface unit is carefully designed with customized interfaces that meet the specifications of the component under test and the testing requirements. These interfaces come in various forms, including sockets, slots, and terminals, to ensure that the test connection with the component under test, test equipment, and industrial control computer is convenient, efficient, stable, and reliable. The signal transmission and reception unit is responsible for the accurate transmission and reception of test signals, ensuring the integrity and accuracy of data during the test process. It includes signal amplification, filtering, and isolation circuits to improve the signal's anti-interference capability and transmission quality. The interface protection unit is equipped with protection measures at the test interface, including overcurrent protection and short circuit protection, to prevent damage to the interface or test equipment due to unexpected situations during the test process. The connection stability and reliability unit is dedicated to ensuring the stability and reliability of the connection between the test interface and the component under test, test equipment and industrial control computer. By adopting locking mechanism and anti-detachment design technology, it effectively avoids test errors and failures caused by loose or poor connection, and ensures the smooth progress of the test process and the accuracy of the results.

5. The automatic computer-controlled test bench for spoilers and elevators according to claim 1, characterized in that: The relay switch and matrix board module includes a control unit, a relay switch array, a signal transmission and isolation unit, a bus interface unit, a matrix switch network, a control logic unit, and an expansion and compatibility unit; The control unit is responsible for receiving instructions from the test system or industrial control computer and precisely controlling the relay switches; the relay switch array is configured with a corresponding number of relay switches according to the number of pins of the SEC and the test requirements to realize the test control of the SEC pins; the signal transmission and isolation unit ensures that the test signal is accurately and safely transmitted between the relay switch board and the SEC to avoid signal interference or damage. The bus interface unit connects to the test equipment via a bus to achieve high-speed and stable data transmission. The matrix switch network consists of multiple relays, which control the conduction sequence of ports on each bus, optimizing test connections and reducing the number of relays. The control logic unit presets control logic according to test requirements to ensure that the matrix switch network can conduct ports in a predetermined order to complete the test task. The expansion and compatibility unit is designed with expansion interfaces and compatibility logic to connect with other test boards or systems, improving the flexibility and versatility of the test system.

6. The automatic computer testing platform for spoilers and elevators according to claim 1, characterized in that: The communication board module includes a core communication unit and an auxiliary operation unit; The core communication unit includes a serial data interface, an RS485 interface, and WLAN. The serial port has low cost and is suitable for long-distance communication. RS485 offers long transmission distances and high speeds, and supports multiple nodes; WLAN, on the other hand, uses Wi-Fi to achieve wireless data transmission, which is flexible and convenient, and suitable for the rapid deployment and mobility requirements in industrial automation testing. The auxiliary operating unit includes a processor, memory, power management, and interface circuitry, which together support the efficient operation of the communication board module.

7. The automatic computer-controlled test bench for spoilers and elevators according to claim 1, characterized in that: The ARINC 429 board module includes a signal amplification unit and a level conversion unit; The signal amplification unit uses an AD828 dual-channel video operational amplifier to amplify the ARINC 429 signal sent by the SEC to enhance signal gain and output drive capability. The level conversion unit then sends the amplified ARINC 429 signal to an LM219D precision high-speed dual-channel comparator. This unit is responsible for level conversion to ensure that the output signal is a TTL level that the master control module can recognize.

8. The automatic computer testing platform for spoilers and elevators according to claim 1, characterized in that: The main control module includes an FPGA core control unit, a physical address configuration unit, a clock circuit unit, and a power management unit; The FPGA core control unit, based on a field-programmable logic array, is responsible for the control and data processing functions of the entire test bench. This FPGA core control unit includes an FPGA configuration interface for programming and configuring the FPGA. The physical address configuration unit is responsible for assigning and configuring physical addresses to each component in the test bench, ensuring correct data transmission and processing. The clock circuit unit provides a stable clock signal, ensuring that all modules in the test bench can work synchronously, guaranteeing data accuracy and consistency. The power management unit is responsible for converting the input power into the DC voltage required by the test bench, providing a stable power supply to each module.

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