Alternating current power supply board detection device in aircraft attitude and heading calculation component
By designing a dedicated AC power board testing device for aircraft attitude calculation components and adopting a fully automated testing program, the problem of high testing and diagnosis difficulty in existing technologies has been solved. This enables full-coverage testing and fault location of the AC power board, reducing testing costs and time.
Patent Information
- Application Number
- CN202423014419.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-07
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-12-07
AI Technical Summary
Existing technologies cannot perform specialized testing and diagnosis of the AC power board inside the aircraft attitude calculation component, resulting in difficulties in fault diagnosis and test signal acquisition, and making preventive maintenance impossible.
A detection device for the AC power board inside an aircraft attitude calculation component was designed, including a power supply module, a matrix switch conversion module, a multi-channel analog output module, an ID recognition circuit module, and a drive circuit module. It adopts a fully automated testing program, which can perform full-coverage testing on the AC power board and locate the fault to the specific module.
It achieves fully automated testing of AC power boards, reducing testing time and economic costs, enabling the discovery of potential quality problems, carrying out preventive maintenance, and locating faults at the chip level, thus solving the problems of difficult signal testing and high maintenance difficulty.
Smart Images
Figure CN223784473U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of airborne AC power board detection technology, specifically a detection device for the AC power board inside an aircraft attitude calculation component. Background Technology
[0002] The AC power supply board is an important component of a certain type of attitude and bearing calculation unit, and is an electronic data acquisition system. Its main functions are as follows:
[0003] (1) Supply the three-phase power supply and longitudinal and transverse correction power supply to the gyroscope to output voltage according to the prescribed procedure;
[0004] (2) It has a main / standby switching function. In standby mode, the three-phase 36V output voltage drops to 23V±4V.
[0005] Previously, AC power boards were tested using specialized airborne testing equipment. This method had several drawbacks:
[0006] (1) The test items only test the functional performance of the product, and cannot conduct special tests and diagnoses based on the characteristics of the board, or carry out preventive maintenance.
[0007] (2) When the product is not working due to the failure of the AC power board, it is difficult to further diagnose and test the board. Because the product test software is an EXE executable file, the test signal often cannot stay at the position we want, which increases the difficulty of signal acquisition. Utility Model Content
[0008] To address the aforementioned problems, this utility model proposes a detection device for the AC power board inside an aircraft attitude calculation component.
[0009] An AC power board testing device for an aircraft attitude calculation component includes a power supply module for connecting the power supply of a general test platform to an adapter board, a matrix switch conversion module for detecting signal quality, a multi-channel analog output module for switching control signals via relays, an ID recognition circuit module for reading information from a host computer and displaying it on an LCD screen, and a drive circuit module as the driving part of the circuit.
[0010] The beneficial effects of this utility model are as follows: Compared with previous testing methods, this utility model has developed a special testing device for the unique characteristics of the AC power board inside the attitude calculation component of a certain aircraft model. It adopts a fully automated testing program, which reduces testing time and economic costs, and can discover potential quality problems for preventive maintenance. If the target board under test has a fault, it can perform full-coverage testing on all functions, and can locate the fault to a specific module based on the test results. By applying different excitation signals to a single module and collecting the signals, the fault can be located at the chip level, which facilitates detection and troubleshooting and effectively solves the problems of difficult board signal testing and high maintenance difficulty. Attached Figure Description
[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0012] Figure 1 This is a schematic diagram of the module structure of this utility model;
[0013] Figure 2 This is a schematic diagram of the power supply module structure of this utility model;
[0014] Figure 3 This is a schematic diagram of the matrix switch conversion module of this utility model;
[0015] Figure 4 This is a schematic diagram of the multi-channel analog output module structure of this utility model;
[0016] Figure 5 This is a schematic diagram of the ID recognition circuit module of this utility model;
[0017] Figure 6 This is a schematic diagram of the drive circuit module of this utility model. Detailed Implementation
[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the utility model will be further described below.
[0019] like Figures 1 to 6 As shown, an AC power board detection device for an aircraft attitude calculation component includes a power supply module for connecting the power supply of a general test platform to an adapter board, a matrix switch conversion module for detecting signal quality, a multi-channel analog output module for switching control signals via relays, an ID recognition circuit module for reading information from a host computer and displaying it on an LCD screen, and a drive circuit module as the driving part of the circuit.
[0020] This test group primarily tests the power supply filtering circuit to ensure its proper functioning. Port L36V is directly grounded, and a 34410A digital multimeter is used to measure continuity between port L36V and ground. If continuity is found, the circuit is functioning correctly. Next, an AMC4613 matrix switch is used to apply a 5V pull-up to port H36V. The 34410A digital multimeter is then used to measure the voltage at port H36V. If the voltage is 5V, this part of the circuit is functioning correctly.
[0021] The power switching circuit test procedure is as follows:
[0022] This test group primarily tests the performance of power switching circuits.
[0023] When designing the circuit, apply a 5V DC pull-up to port NH26V, and do not apply an AC signal to port WH26V. Test that the final output port H26V should be a 5V DC level. Then apply a 26V AC signal to port WH26V, and test that port H26V should be a 26V AC signal.
[0024] The power supply module includes an LED that displays the power supply status and a programmable DC power supply that provides different voltages. The LED displays the power supply status, and the circuit diagram is shown below. Figure 3 As shown, the programmable DC power supply E3649A provides +5V for ID identification, +5V and +28V for the board under test, while the programmable AC power supply UPC32E provides AC signal input to the board under test. LEDs D1-D3 are used to indicate the operating status of the DC power supply.
[0025] The programmable DC power supply E3649A provides +5V for ID identification and +5V and +28V for the board under test.
[0026] This invention addresses the characteristics of the AC power supply board under test by equipping it with an isolated analog output module. This module allows for the application of a specified voltage output to the board under test and includes output protection to prevent accidental damage. Test results can be displayed in real-time on the test interface, and the test program can be executed step-by-step, greatly facilitating troubleshooting for repair personnel.
[0027] In terms of reliability, the JANTX2N6768 from INFINEON was selected as the driver for the drive circuit. Its drain-source voltage can reach 400V and the continuous drain current is 14A. While ensuring its own reliability, it also fully simulates the working conditions of the machine under heavy load, ensuring the accuracy and reliability of the test results.
[0028] Compared with previous testing methods, this invention has developed a special testing device for the unique characteristics of the AC power board inside the attitude calculation component of a certain aircraft model. It adopts a fully automated testing program, which reduces testing time and economic costs, and can discover potential quality problems for preventive maintenance. If the target board under test has a fault, it can perform full-coverage testing on all functions, and can locate the fault to a specific module based on the test results. By applying different excitation signals to a single module and collecting the signals, the fault can be located at the chip level, which facilitates detection and troubleshooting. This effectively solves the problems of difficult signal testing and high maintenance difficulty of board components.
[0029] The matrix switch conversion module includes an AMC4613 board for controlling input switching of control signals and acquiring output signals, and a 34410A digital multimeter for detecting signal quality. The AMC4613 board controls input switching of control signals and acquires output signals; the 34410A digital multimeter is used to detect signal quality.
[0030] The multi-channel analog output module includes a relay switch for switching the input terminal to receive a control signal.
[0031] The relay requires control signals to be applied to its four input terminals (ALM, 15S, 50S, and SPARE) for switching.
[0032] The ID recognition circuit module includes an expansion module and an LCD screen. Information is read from the expansion module by a host computer and displayed on the LCD screen. During test program execution, data is sent to the expansion module via the system host serial port to display the current test progress and test data.
[0033] The aforementioned expansion module is an AT24C02 storage adapter board that reads information from a host computer.
[0034] The driving circuit module includes transistors. The three-phase AC output needs to be driven by three MOSFETs. The transistors selected are INFINEON's JANTX2N6768, which can drive a current of 14A at room temperature.
[0035] The test program was developed using Vite software. The software test procedure and working principle of this circuit are described below:
[0036] The test is divided into six groups: (1) ID recognition test and system power supply test; (2) Three-phase control circuit test and opto-isolation control bidirectional regulation circuit test; (3) Fault detection circuit test; (4) 50S control circuit test; (5) Power filtering circuit test; (6) Power switching circuit test.
[0037] The ID recognition test and system power supply test procedures are as follows:
[0038] This test group primarily checks whether the required adapter hardware is installed correctly as required, preventing potential damage to the circuit board under test due to human error. This test group uses an expansion module interface and utilizes information stored on the adapter hardware for ID identification. If incorrect data is collected during this test group execution, the test will jump to the "Test End" test group. After checking that the adapter hardware is selected and connected correctly, the test continues by supplying power to the circuit board under test, providing three DC power signals indicated by D1-D3. The output prompts of the power module are checked to ensure they match the expected output values for each power supply; otherwise, the corresponding power supply should be immediately disconnected to prevent power failure from damaging the circuit board under test.
[0039] The testing procedures for the three-phase control circuit and the opto-isolated bidirectional control circuit are as follows:
[0040] This test group consists of five test items, which mainly test whether the three-phase control circuit and opto-isolation control bidirectional regulation circuit of the board under test can function normally, and whether the fault detection circuit can function normally under normal working conditions and under faulty conditions with no output.
[0041] DET1.1 uses the relay switching in relay switch AMC4606-2 to input high level to 15s and 50s signals, and low level to SPARE and ALM signals. Use digital multimeter 34410A to collect the three-phase AC signals AO, BO, and CO; collect the ALI level at port and check if it is within the acceptable range.
[0042] DET1.2 uses the relay switching in relay switch AMC4606-2 to input a high level for the 50s signal and a low level for the 15s, SPARE, and ALM signals. Use a digital multimeter 34410A to collect the three-phase AC signals AO, BO, and CO; collect the ALI level at port ALI to check if it is within the acceptable range.
[0043] DET1.3 uses the relay switching in relay switch AMC4606-2 to input low level signals to 15s, 50s, SPARE, and ALM. Use digital multimeter 34410A to collect the three-phase AC signals of AO, BO, and CO; collect the ALI level at port and check if it is within the acceptable range.
[0044] DET1.4 uses the relay switching in relay switch AMC4606-2 to input a high level to the SPARE signal and a low level to the 15s, 50s, and ALM signals. Use a digital multimeter 34410A to collect the three-phase AC signals AO, BO, and CO; collect the ALI level at port and check if it is within the acceptable range.
[0045] DET1.5 uses the relay switching in relay switch AMC4606-2 to input a high level to the ALM signal and a low level to the 15s, 50s, and SPARE signals. Use a digital multimeter 34410A to collect the three-phase AC signals AO, BO, and CO; collect the ALI level at the port to see if it is within the acceptable range.
[0046] The fault detection circuit test procedure is as follows:
[0047] DET2.1 Test Point 1: Use a programmable AC power supply UPC32E to add two-phase AC power to ports AI and BI, and no signal to CI. When one of the three-phase inputs is missing, use a 34410A to collect the level of port ALI, which should be low.
[0048] DET2.2 Test Point 2 uses a programmable AC power supply UPC32E to apply a very small amplitude three-phase AC power to ports AI, BI, and CI. When the three-phase input is very small, the ALI level should also be low.
[0049] The 50S control circuit test procedure is as follows:
[0050] Using the relay switching function in the AMC4606-2, a high level is applied to the port for 50 seconds. The data is collected using a 34410A digital multimeter. D1 should be lower than 5V, and D2 should be 5V.
[0051] Using the relay switching function in the AMC4606-2, a low level is applied to the port for 50 seconds. The data is collected using a 34410A digital multimeter. D1 should be 5V and D2 should be lower than 5V.
[0052] 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 the principles of this 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 claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A detection device for the AC power board inside an aircraft attitude calculation component, characterized in that: It includes a power supply module for connecting the power supply of a general test platform to the adapter board, a matrix switch conversion module for detecting signal quality, a multi-channel analog output module for switching control signals via relays, an ID recognition circuit module for reading information from a host computer and displaying it on an LCD screen, and a drive circuit module as the driving part of the circuit.
2. The AC power board detection device for an aircraft attitude calculation component according to claim 1, characterized in that: The power supply module includes an LED that displays the power supply status and a programmable DC power supply that provides different voltages to achieve power supply.
3. The AC power board detection device for an aircraft attitude calculation component according to claim 2, characterized in that: The programmable DC power supply provides +5V for ID identification and +5V and +28V for the board under test.
4. The AC power board detection device for an aircraft attitude calculation component according to claim 1, characterized in that: The matrix switch conversion module includes an AMC4613 board for input switching of control signals and acquisition of output signals, and a 34410A digital multimeter for detecting signal quality.
5. The AC power board detection device for an aircraft attitude calculation component according to claim 1, characterized in that: The multi-channel analog output module includes a relay switch for switching the input terminal to receive a control signal.
6. The AC power board detection device for an aircraft attitude calculation component according to claim 5, characterized in that: The relay requires control signals to be applied to its four input terminals: ALM, 15S, 50S, and SPARE, for switching.
7. The AC power board detection device for an aircraft attitude calculation component according to claim 1, characterized in that: The ID recognition circuit module includes an expansion module and an LCD display screen.
8. The AC power board detection device for an aircraft attitude calculation component according to claim 7, characterized in that: The aforementioned expansion module is an AT24C02 storage adapter board that reads information from a host computer.
9. The AC power board detection device for an aircraft attitude calculation component according to claim 1, characterized in that: The driving circuit module includes a transistor.