Complex cargo hold door position state judgment method
By using redundant micro-switches and a cargo door position status determination system with importance priority, the problem of inaccurate cargo door position status determination is solved, reliable control is achieved in complex environments, and the safety and reliability of the system are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-25
- Publication Date
- 2026-03-10
AI Technical Summary
In the existing technology, the position status of the cargo door is not accurately determined, which is limited by the reliability of the position sensor and the level of installation technology, resulting in unreliable door control.
By employing multiple micro-switches, a cargo door control computer, and a GJB289A bus interface, and through hard-wired connections and redundancy backups, a complex cargo door position status determination system is designed to achieve signal redundancy settings, importance priority management, and power distribution channel allocation optimization.
It enables reliable determination of the cargo door position status in complex environments, improves the system's safety and reliability, and reduces reliance on position sensors.
Smart Images
Figure CN121639152A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of aviation, specifically relating to a method for determining the position and status of complex cargo door. Background Technology
[0002] Cargo doors are critical moving functional components of transport aircraft used for loading and unloading cargo, and their proper operation is essential for the successful completion of transport missions. Large transport aircraft typically employ a structure consisting of a left-side door, a right-side door, a center door, a ramp, and a sealed door. This cargo door structure must not only meet the requirements of reversing positions at any location and real-time status monitoring during control operations, but also consider the coordination of multiple door positions, confirmation of any initial position, and handling of anomalies during execution. Therefore, accurate judgment of the cargo door's position status is a key factor affecting the reliable execution of cargo door control. Furthermore, during in-flight door opening, airflow can cause structural deformation of the door; the position sensor's power distribution may lose power due to onboard factors; the reliability of some position sensors may be limited; and the installation process of position sensors varies during aircraft manufacturing. All these factors can lead to inaccurate feedback from position sensors on the status of individual doors, thus affecting the accurate judgment of the cargo door's position status.
[0003] Therefore, given the high safety and reliability requirements of cargo doors, the question of how to design a safe and efficient method for determining the position and status of cargo doors urgently needs to be addressed. Summary of the Invention
[0004] To address the aforementioned problems, this application provides a position status determination system for a complex cargo door system, comprising:
[0005] Multiple micro-switches are configured to collect the position status signal of the cargo door;
[0006] Two cargo door control computers are connected to the micro-switches via hardwires for real-time acquisition and processing of position status signals;
[0007] The GJB289A bus interface connects two cargo door control computers for data exchange and redundancy backup.
[0008] The power distribution channel allocation module allocates power distribution resources according to the importance and priority of the micro-switch.
[0009] The micro-switch, cargo door control computer, bus interface, and power distribution channel allocation module work together to reliably determine the position and status of the cargo door.
[0010] Preferably, the micro-motion switch includes a lock-in signal acquisition switch, an unlock signal acquisition switch, and a motion position signal acquisition switch, with two micro-motion switches set at each signal acquisition point to form a dual-redundancy configuration.
[0011] Preferably, the cargo door control computer uses an embedded processor with built-in logic algorithms to perform signal redundancy judgment, priority management, and fault handling.
[0012] Preferably, the power distribution channel allocation module includes at least four power distribution channels: power distribution channel group 1 is used for critical priority micro switches, power distribution channel group 2 is used for important priority micro switches, and power distribution channel group 3 and power distribution channel group 4 are used for general priority micro switches.
[0013] Preferably, it also includes a human-machine interface connected to the cargo door control computer for real-time display of cargo door status, priority settings, and fault alarm information.
[0014] Preferably, the system is applicable to the coordinated control of the left side door, right side door, middle door, ramp, and sealed door of a large transport aircraft.
[0015] A method for determining the position status of a complex cargo hold door system, employing the aforementioned complex cargo hold door system position status determination system, includes the following steps:
[0016] Step S1, Position sensor signal acquisition redundancy setting: Set the redundancy of the signal transmitting end and the signal acquiring end for the micro switch signal acquisition;
[0017] Step S2, Cargo door importance priority setting: Based on the status of the control panel or indicator light connected to the micro switch signal output terminal, and the key links of the cargo door associated with the micro switch in the coordinated control, set the importance priority of the micro switch;
[0018] Step S3: Position sensor power distribution channel allocation setting: Assign power distribution channels to the micro switch power distribution terminal according to importance priority.
[0019] Preferably, the signal transmission end redundancy setting in step S1 includes: designing two micro-switches for each location signal acquisition point; when at least one micro-switches is working normally, the acquired signal is valid; when both micro-switches are abnormal, the acquired signal is invalid.
[0020] Preferably, the signal acquisition redundancy setting in step S1 includes: acquiring micro-switch signals in parallel through two cargo door control computers and exchanging data with each other via the GJB289A bus; when the hard-wired signal is abnormal, the bus data is used to verify the status first.
[0021] Preferably, the importance priority in step S2 is set to three levels: critical, important, and general; the priority classification is based on the degree of impact of micro-switch faults on coordinated control, fault troubleshooting time, and cable troubleshooting difficulty.
[0022] Preferably, the power distribution channel allocation setting in step S3 includes: key priority micro switches occupying a dedicated power distribution channel; important priority micro switches connecting up to three micro switches per power distribution channel; and general priority micro switches connecting up to seven micro switches per power distribution channel.
[0023] Preferably, after step S3, step S4, real-time status monitoring and fault handling, is also included: the status of the micro switch is continuously monitored by the cargo door control computer, and when an abnormality is detected, it is automatically switched to the backup signal source or an alarm is triggered.
[0024] Preferably, the fault handling includes: recording the faulty micro switch information and prompting maintenance personnel to check the circuit or sensor through a human-machine interface.
[0025] Preferably, the method prioritizes using bus data to compensate for door deformation errors caused by airflow when the aircraft door is open in the air.
[0026] This invention designs a method for determining the position status of complex cargo doors based on redundancy and importance priority to maximize the saving of position sensor and power distribution channel resources, and to achieve safe and reliable determination of the position status of complex cargo doors. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of a set of micro-switches arranged to indicate the closing of a hatch;
[0028] Figure 2 This is a flowchart of the method execution steps of the present invention. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings. Figures 1-2As shown, the method for determining the position and status of complex cargo door in this invention specifically includes the following steps:
[0030] Step S1: Set the redundancy of position sensor signal acquisition.
[0031] Step S101: Signal Transmitter Redundancy Setting; This invention uses micro-switches as position sensors to acquire the real-time status of the hatch. Based on the importance of the acquired hatch position sensor signal to the overall hatch control system, two micro-switches (2 redundancies) are designed for acquiring this signal. The micro-switches are connected to the cargo hatch control computer via hardwired connections. If either of the two micro-switches is working normally, the acquired signal can be used normally by the hatch control system; only when both micro-switches are malfunctioning can the accurate hatch status be determined. (See attached document) Figure 1 Taking the locking switch of a cargo hold door as an example, there are a total of 4 micro switches. Among them, two micro switches are set up to collect the locking signals of the front and rear cargo holds doors.
[0032] Step S102, Signal acquisition terminal redundancy setting; refer to the appendix. Figure 1 Two cargo door control computers are set up to collect the status of all position sensors in real time and transmit the data to each other via the GJB289A bus. In step S101, if the status of the position sensors cannot be determined by the hard-wired signal, the status is determined by the bus. If the bus is online and the bus values are equal, the accurate status of the hatch can be determined; otherwise, the accurate status of the hatch cannot be determined. If the bus is offline, the accurate status of the hatch also cannot be determined.
[0033] Step S2: Cargo door importance priority setting. Based on factors such as whether the micro-switch signal output terminal is connected to the control panel and indicator lights, and the stage of the cargo door associated with the micro-switch in the coordinated control of the left, right, middle, ramp, and sealed doors (whether it is in a critical stage of coordinated control, the degree of impact of abnormal operation on the coordinated control of other doors, the time spent troubleshooting, and the difficulty of cable troubleshooting after a micro-switch malfunction), an importance priority is set for a group of position signal acquisition micro-switches associated with the cargo door. Specifically, this invention sets a group of micro-switches associated with the cargo door in descending order of importance priority as critical, important, and general.
[0034] Step S3: Position Sensor Power Distribution Channel Allocation and Setting. Based on the importance priority determined in Step S2, power distribution channels are allocated to the micro-switch power distribution terminals. The allocation follows these principles: First, a dedicated power distribution channel is assigned to a group of micro-switches with a critical importance priority; second, a single power distribution channel can connect a maximum of three groups of micro-switches with an important importance priority, otherwise a new power distribution channel needs to be set up, and the micro-switches of this priority should be evenly distributed across several power distribution channels; finally, a single power distribution channel can connect a maximum of seven micro-switches with a general importance priority. Similarly, otherwise, a new power distribution channel needs to be set up, and the micro-switches of this priority should be evenly distributed across several power distribution channels.
[0035] Specifically, based on practical considerations, it is assumed that the coordinated control of the left side hatch, right side hatch, middle hatch, ramp, and sealed door requires approximately 14 sets of micro-switches. Among them, 1 set of critical micro-switches, 3 sets of important micro-switches, and 10 sets of general micro-switches are designated.
[0036] Step S301: Set up a separate power distribution channel (power distribution channel group 1) for micro switches with critical importance priority.
[0037] Step S302: Set up another power distribution channel (power distribution channel group 2) for the micro switch with important priority.
[0038] Step S303: Connect all other micro switches with a general importance priority to the remaining two power distribution channels. Specifically, based on the cable design and equipment layout, evenly distribute the micro switches with a general importance priority across the two power distribution channels. More specifically, according to the settings given in step S3, five micro switches can be associated with one power distribution channel (power distribution channel group 3), and the other five micro switches can be associated with another power distribution channel (power distribution channel group 4).
[0039] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A complex cargo door system position status determination system, characterized by, The system comprises: a plurality of micro switches configured to collect position state signals of cargo doors; two cargo door control computers connected to the micro switches via hardwires for real-time collection and processing of the position state signals; a GJB289A bus interface connecting the two cargo door control computers for data intercommunication and redundancy backup; a power distribution channel allocation module for allocating power distribution resources according to the importance priority of the micro switches. The micro switches, the cargo door control computers, the bus interface and the power distribution channel allocation module work cooperatively to realize reliable judgment of the position state of the cargo doors.
2. The complex cargo door system position status determination system of claim 1, wherein, The micro switches comprise lock-in-position signal collection switches, unlock signal collection switches and movement position signal collection switches, and two micro switches are arranged at each signal collection point to form a two-redundancy configuration.
3. The complex cargo door system position status determination system of claim 1, wherein, The cargo door control computers adopt embedded processors and built-in logic algorithms for signal redundancy judgment, priority management and fault processing.
4. The complex cargo door system position status determination system of claim 1, wherein, The power distribution channel allocation module comprises at least four groups of power distribution channels, with the power distribution channel group 1 for key priority micro switches, the power distribution channel group 2 for important priority micro switches, and the power distribution channel group 3 and the power distribution channel group 4 for general priority micro switches.
5. The complex cargo door system position status determination system of claim 1, wherein, The system further comprises a human-machine interface connected to the cargo door control computers for real-time display of cargo door states, priority settings and fault alarm information.
6. The complex cargo door system position status determination system of claim 1, wherein, The system is applicable to the cooperative control of left side doors, right side doors, center doors, ramps and sealing doors of large transport aircraft.
7. A method of determining the position state of a complex cargo door system, using a system for determining the position state of a complex cargo door system according to any one of claims 1 to 6, characterized in that The system comprises the following steps: Step S1: position sensor signal collection redundancy setting, in which signal sending end redundancy and signal collection end redundancy are set for the micro switches; Step S2: cargo door importance priority setting, in which the importance priority of the micro switches is set according to the state of the control panel or indicator light connected to the signal output end of the micro switch and the key link of the cargo door associated with the micro switch in the cooperative control; Step S3: position sensor power distribution channel allocation setting, in which the power distribution end of the micro switch is allocated with a power distribution channel according to the importance priority.
8. The method of claim 1, wherein, The signal sending end redundancy setting in Step S1 comprises designing two micro switches for each position signal collection point, with the collected signal being valid when at least one micro switch is working normally and invalid when both micro switches are abnormal.
9. The method of claim 1, wherein, The signal collection end redundancy setting in Step S1 comprises collecting the micro switch signals in parallel by the two cargo door control computers and intercommunicating the data via the GJB289A bus; when the hardwire signal is abnormal, the bus data is used to verify the state preferentially.
10. The method of claim 1, wherein, The importance priority setting in Step S2 is three levels: key, important and general; and the priority division is based on the influence degree of the micro switch fault on the cooperative control, the fault troubleshooting time and the cable troubleshooting difficulty.
11. The method of claim 10, wherein the method further comprises: The power distribution channel allocation setting in Step S3 comprises that the key priority micro switch exclusively occupies a group of power distribution channels, the important priority micro switch is connected to at most three groups of micro switches per power distribution channel group, and the general priority micro switch is connected to at most seven micro switches per power distribution channel group.
12. The method of claim 7, wherein the method further comprises: determining a position of the complex cargo door system based on the determined position of the cargo door system. After step S3, step S4, real-time state monitoring and fault handling, is further included: continuously monitoring the micro switch state by the cargo door control computer, automatically switching to a backup signal source or triggering an alarm when an abnormality is detected.
13. The method of claim 7, wherein the method further comprises: The fault handling includes: recording the fault micro switch information, and prompting the maintenance personnel to troubleshoot the circuit or sensor through a human-computer interaction interface.
14. The method of claim 7, wherein the method further comprises: determining a position of the complex cargo door system based on the determined position of the cargo door system. The method preferentially uses bus data to compensate for the door deformation error caused by air flow in the case of opening the door in the air.