A PSU control circuit and training capsule

Abstract

The application relates to a PSU control circuit and a training simulation cabin, wherein the PSU control circuit comprises a power supply, a PLC and at least one group of PSUs. Each group of PSUs comprises at least one local control loop and at least one direct control loop. In the local control loop, the first end of a first trigger switch is connected to the negative pole of the power supply, and the second end is connected to the control end of a first self-locking device; the first interface of the execution end of the first self-locking device is connected to the first end of a first load, and the second interface is connected to the positive pole of the power supply; and the second end of the first load is connected to the negative pole of the power supply. In the direct control loop, the first end of a second load is connected to the output end of the PLC, and the second end of the second load is connected to the negative pole of the power supply. The application solves the problem that the traditional PLC centralized control cannot control the functional PSUs in the full-cabin layout of the train crew training simulation cabin due to too many point positions.

Description

Technical Field

[0001] This application relates to the field of PSU control, and in particular to a PSU control circuit and a training simulator. Background Technology

[0002] A Passenger Service Unit (PSU) is a functional unit installed above passenger seats in an aircraft cabin, integrating reading lights, passenger call lights, and other equipment. In the field of cabin crew training simulators, to realistically replicate the aircraft cabin environment, a PSU must be installed in the simulator and its electrical control functions must be implemented.

[0003] Flight attendant training simulators are used for flight attendant training and need to replicate the real aircraft cabin environment as closely as possible. Therefore, functional power supply units (PSUs) must be installed throughout the entire cabin. Currently, the industry standard for controlling the PSUs in simulators typically uses custom-manufactured simulated PSU panels combined with a programmable logic controller (PLC). In this solution, each lighting component requires one input and one output point from the PLC, resulting in a single PSU occupying multiple PLC points. Furthermore, all lighting components are centrally controlled by the PLC, leading to a linear increase in the wiring and point usage between the PSU and the PLC, making full-cabin deployment unsustainable. Limited by PLC point resources, existing simulators typically only provide a few rows of functional PSUs at the front of the simulator, failing to reproduce the real aircraft environment throughout the entire cabin and impacting training effectiveness.

[0004] There is currently no effective solution to the technical problem that when deploying a PLC-based centralized control PSU solution in a cabin crew training simulator, the excessive number of PLC points makes it impossible to achieve a functional PSU layout throughout the entire cabin. Utility Model Content

[0005] This application provides a PSU control circuit and a training simulation cabin to solve the technical problem in the related art that when deploying a PSU solution based on PLC centralized control in a cabin crew training simulation cabin, the excessive number of PLC points makes it impossible to achieve a functional PSU layout throughout the entire cabin.

[0006] In the first aspect, this application provides a PSU control circuit, including a power supply, a PLC, and at least one set of PSUs;

[0007] Each group of PSUs includes:

[0008] At least one local control loop includes a first trigger switch, a first self-locking device, and a first load; the first self-locking device includes a first control terminal and a first execution terminal;

[0009] The first terminal of the first trigger switch is connected to the negative terminal of the power supply, and the second terminal of the first trigger switch is connected to the first control terminal.

[0010] The first interface of the first execution end is connected to the first end of the first load, and the second interface of the first execution end and the second end of the first load are respectively connected to the positive and negative terminals of the power supply.

[0011] At least one direct control loop includes a second load; a first end of the second load is connected to the output terminal of the PLC, and a second end of the second load is connected to the negative terminal of the power supply.

[0012] In some embodiments, the first interface of the first execution terminal corresponding to the local control loop is connected to the first terminal of the first load, and the second interface of the first execution terminal is connected to the positive terminal of the power supply.

[0013] The second end of the first load is connected to the negative terminal of the power supply.

[0014] In some embodiments, the first interface of the first execution terminal corresponding to the local control loop is connected to the first terminal of the first load, and the second interface of the first execution terminal is connected to the negative terminal of the power supply.

[0015] The second end of the first load is connected to the positive terminal of the power supply.

[0016] In some embodiments, the PSU further includes at least one feedback control loop;

[0017] Each of the feedback control loops includes a second trigger switch, a second self-locking device, and a third load; the second self-locking device includes a second control terminal and a second execution terminal;

[0018] The first terminal of the second trigger switch is connected to the second control terminal;

[0019] The first interface of the second execution end is connected to the first end of the third load, and the second interface of the second execution end and the second end of the third load are respectively connected to the positive and negative terminals of the power supply.

[0020] The first end of the third load is also connected to the input end of the PLC.

[0021] In some further embodiments, the first interface of the second execution terminal corresponding to the feedback control loop is connected to the first terminal of the third load, and the second interface of the second execution terminal is connected to the positive terminal of the power supply.

[0022] The second end of the third load is connected to the negative terminal of the power supply; the first end of the third load is also connected to the input terminal of the PLC.

[0023] In some further embodiments, the feedback control loop is connected in parallel with the local control loop.

[0024] In some further embodiments, the first self-locking device and the second self-locking device include: a self-locking relay;

[0025] The first control terminal and the second control terminal include: the signal terminal of the corresponding self-locking relay;

[0026] The first execution end and the second execution end include: the corresponding contacts of the self-locking relay.

[0027] In some further embodiments, a group of PSUs includes at least two of the feedback control loops, each of which is configured in parallel.

[0028] In some further embodiments, the second control terminals of the second self-locking devices corresponding to each of the feedback control loops are interconnected.

[0029] Secondly, this application provides a training simulation chamber, comprising:

[0030] The seating area includes: at least one seat;

[0031] The PSU control circuit as described in any one of the first aspects;

[0032] Includes: PSUs in quantity corresponding to the number of seats;

[0033] Each PSU corresponds to the seat configuration.

[0034] Compared with existing related technologies, the embodiments of this application have the following beneficial effects:

[0035] This application embodiment sets up a power supply, PLC, and PSU structure including local control loop and direct control loop in the PSU control circuit. It uses a first trigger switch in conjunction with a first self-locking relay to achieve local independent control of the first load, while directly controlling the second load through the PLC. This makes the entire circuit structure clear and the wiring standardized. The local control and PLC direct control work together to meet the needs of manual triggering operation and realize centralized automatic control of the system. When the PSU control circuit is deployed in the training simulation cabin, it can effectively simplify the layout of the control circuit in the training simulation cabin, improve the stability and reliability of the circuit operation, and reduce the complexity of the control logic. This solves the technical problem in related technologies where the deployment of PLC-based centralized control PSU schemes in the cabin training simulation cabin is unable to achieve a functional PSU layout throughout the cabin due to the excessive number of PLC points occupied.

[0036] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0037] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0038] Figure 1 This is a circuit diagram of a PSU control circuit provided in an embodiment of this application;

[0039] Figure 2 This is a circuit diagram illustrating a first preferred wiring configuration for a local control loop provided in an embodiment of this application;

[0040] Figure 3 This is a circuit diagram illustrating a second preferred wiring configuration for a local control loop provided in an embodiment of this application;

[0041] Figure 4 This is a circuit diagram of a PSU control circuit with an integrated feedback control loop provided in an embodiment of this application;

[0042] Figure 5 This is a circuit diagram showing the preferred wiring of a feedback control loop provided in an embodiment of this application;

[0043] Figure 6 This is a schematic diagram of the linkage control of various feedback control loops provided in an embodiment of this application;

[0044] Figure 7 This is a simplified circuit diagram of a feedback control loop provided in an embodiment of this application;

[0045] Figure 8 This is a complete circuit diagram of a PSU control circuit provided in an embodiment of this application.

[0046] In the diagram: 100, Passenger Service Components; 110, Power Supply; 120, Programmable Logic Controller. Detailed Implementation

[0047] To better understand the purpose, technical solution, and advantages of this application, the application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0048] Unless otherwise defined, the technical or scientific terms used in this application shall have the general meaning understood by one of ordinary skill in the art to which this application pertains. Words such as “a,” “an,” “an,” “the,” “the,” and “these” used in this application do not indicate quantitative limitation and may be singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or modules (units) is not limited to the listed steps or modules (units) but may include steps or modules (units) not listed, or may include other steps or modules (units) inherent to these processes, methods, products, or devices. Words such as “connected,” “linked,” and “coupled” used in this application are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. “Multiple” used in this application refers to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. Normally, the character " / " indicates that the objects before and after it are in an "or" relationship. The terms "first," "second," "third," etc., used in this application are merely to distinguish similar objects and do not represent a specific order.

[0049] This embodiment provides a PSU control circuit. Figure 1 This is a circuit diagram of the PSU control circuit in this embodiment, as shown below. Figure 1 As shown, the circuit includes a power supply 110, a PLC, and at least one PSU. The PLC is a programmable logic controller 120; the PSU is a passenger service unit 100. For illustration purposes, Figure 1 Only one set of PSUs is drawn in the middle.

[0050] Based on the above structure, when multiple PSUs need to be installed in a flight attendant training simulator, in practical applications, multiple PSUs are usually required to cover the entire passenger seating area. Multiple PSUs can share the same power supply, or multiple power supplies can be set up in groups according to layout requirements. However, all PSUs are connected to the same PLC to ensure unified management and centralized monitoring of control signals.

[0051] Specifically, each PSU group includes at least one local control loop and at least one direct control loop, as illustrated. Figure 1 The diagram only shows the components contained in one local control loop and one direct control loop, and their connection relationships are as described later in this embodiment.

[0052] In practical applications, each PSU typically includes multiple local control loops and multiple direct control loops to correspond to various functional units on the PSU panel, such as reading lights, passenger call lights, no smoking lights, and seatbelt fastening lights. Local control loops are used to implement functions requiring manual operation without real-time interaction with the PLC, such as turning reading lights on and off. Some local control loops can also feed back the operating status to the system side by adding appropriate communication lines while implementing local control; this is suitable for loads like passenger call lights that have local triggering, status maintenance, and PLC interaction capabilities. Direct control loops are used to implement functions requiring unified control and centralized management by instructors, such as the unified turning on and off of no smoking lights and seatbelt fastening lights. This is driven by direct control signals output from the PLC, without manual triggering.

[0053] A single local control loop includes a first trigger switch, a first self-locking device, and a first load. The first self-locking device includes a first control terminal and a first execution terminal. The first terminal of the first trigger switch is connected to the negative terminal of the power supply, and the second terminal is connected to the first control terminal. When the first trigger switch is pressed, the first control terminal is grounded, thereby triggering the first self-locking device to operate and maintain or switch its state. The first interface of the first execution terminal is connected to the first terminal of the first load, and the second interface of the first execution terminal and the second terminal of the first load are connected to the positive and negative terminals of the power supply, respectively. After the first self-locking device operates, the power supply circuit to the first load can be switched on or off via the first execution terminal, thereby turning the first load on or off.

[0054] Based on the above structure, the local control loop achieves independent local control of the first load using a first trigger switch and a first self-locking device, eliminating the need for a PLC to participate in the control process and thus saving on the actual input and output points of the PLC. Simultaneously, since the control loop is entirely completed within the PSU, the connection lines between the PSU and the PLC are reduced, simplifying wiring and improving the system's reliability and maintainability.

[0055] A single direct control loop includes a second load; the first terminal of the second load is connected to the output terminal of the PLC, and the second terminal of the second load is connected to the negative terminal of the power supply.

[0056] Based on the above structure, the direct control loop drives the second load by directly outputting control signals from the PLC, thus achieving centralized control of the second load. This control method is suitable for scenarios that require unified lighting or extinguishing, such as no smoking lights and seatbelt fastening lights. Instructors can trigger the PLC output by operating switches in the cockpit, thereby achieving synchronized operation of the corresponding loads in all PSUs in the cabin, meeting the unified management needs in training scenarios.

[0057] Through the aforementioned technical means, this embodiment utilizes a first trigger switch in conjunction with a first self-locking relay to achieve local independent control of the first load, while simultaneously controlling the second load directly via a PLC. This results in a clear circuit structure and standardized wiring. The local control and direct PLC control work together to meet both manual triggering requirements and centralized automatic system control. This effectively simplifies the control circuit layout within the flight attendant training simulator, improves the stability and reliability of circuit operation, and reduces the complexity of the control logic. Based on these technical effects, this embodiment solves the technical problem in related technologies where deploying a PLC-based centralized control PSU solution in a flight attendant training simulator results in excessive PLC input and output points, making it impossible to achieve a functional PSU layout throughout the entire cabin.

[0058] In some of these embodiments, the first self-locking device may be selected from one or more of the following options:

[0059] The first self-locking device can be a self-locking relay, such as a magnetic latching relay or a bistable relay. Correspondingly, the first control terminal is the relay coil, and the first execution terminal is the relay contact. With this scheme, the coil is only energized during state switching, resulting in low power consumption; the contacts are isolated from the coil, ensuring safe and reliable control.

[0060] The first self-locking device can be an electromagnetic relay with a self-locking function. Correspondingly, the first control terminal is the relay coil, and the first execution terminal is the relay contact. This scheme maintains the state through mechanical self-locking, and the state remains unchanged after power failure, resulting in high reliability.

[0061] The first self-locking device can be a mechanical self-locking switch, such as a push-button self-locking, knob self-locking, or toggle self-locking switch. Correspondingly, the first control end is the mechanical triggering structure of the switch, and the first execution end is the conductive contact of the switch. This solution eliminates the need for electronic components and offers high reliability.

[0062] The first self-locking device can be a bistable switch assembly. Correspondingly, the first control end is the switch triggering mechanism, and the first execution end is the switch contact. This scheme ensures clear state maintenance, provides clear operational feedback, and conforms to ergonomics.

[0063] The first self-locking device can be a solid-state relay with latching function. Correspondingly, the first control terminal is the input control terminal of the solid-state relay, and the first execution terminal is the output terminal of the solid-state relay. This solution eliminates mechanical contacts, offers fast response, long lifespan, and small size for easy integration.

[0064] The first self-locking device can be a logic latch circuit with self-locking and holding functions, such as a hardware self-locking circuit composed of an SR latch or a D latch. Correspondingly, the first control terminal is the trigger input terminal of the latch, and the first execution terminal is the output terminal of the latch. This scheme has high integration, fast response speed, and is easy to expand into complex control logic.

[0065] The first self-locking device can be a mechanically holding contactor. Correspondingly, the first control terminal is the contactor coil, and the first actuation terminal is the contactor's main contacts. This design offers a large contact capacity, making it suitable for high-power loads; it also maintains its state even after the control power supply fails, ensuring high safety.

[0066] In all the above-mentioned selection schemes, the first self-locking device has bistable switching characteristics. A single trigger turns the load on and lights it up, and a second trigger turns the load off and extinguishes it. A single pulse signal can complete the state maintenance, without the need for continuous triggering, which further reduces the occupation of points at the input and output terminals of the PLC, while also reducing the occupation of signal lines and power consumption.

[0067] In addition, in all the above-mentioned selection options, the actuator of the first self-locking device has overload protection adaptability, which can be used in conjunction with the power supply side current limiting device to prevent the load from short-circuiting and damaging the device, thereby improving the service life of the circuit and the safety of the system.

[0068] In some embodiments, the first trigger switch is preferably an instantaneous trigger push-button switch that automatically resets after being released. It is only used to send trigger signals and is not responsible for maintaining the load state. The state latching is achieved by relying on the first self-locking device, thereby clearly distinguishing the functional boundaries between the switch and the self-locking device and ensuring that the control logic is clear and reliable.

[0069] In some of these embodiments, Figure 2 This is a circuit diagram illustrating the first preferred wiring configuration for the local control loop provided in this embodiment. Figure 2 The diagram shows multiple local control loops; in this embodiment, only the following can be referred to. Figure 2The connection relationship of a single local control loop is based on the connection relationship of the previous embodiment. In the local control loop: the first end of the first trigger switch is connected to the negative terminal of the power supply, and the second end of the first trigger switch is connected to the first control terminal; the first interface of the first execution terminal is connected to the first end of the first load, and the second interface of the first execution terminal is connected to the positive terminal of the power supply; the second end of the first load is connected to the negative terminal of the power supply.

[0070] When using the above wiring method, the first actuator is connected in series between the positive terminal of the power supply and the first load, controlling the on / off state of the first load by connecting or disconnecting the positive circuit. This wiring method is a positive control method, which facilitates on-site construction and maintenance; at the same time, the second terminal of the first load is directly connected to the negative terminal, so there is no residual voltage at both ends of the first load when the state is switched, which ensures high safety and reduces the likelihood of leakage interference.

[0071] In some further embodiments, please refer to... Figure 2 In the positive control wiring mode, multiple local control circuits within the same PSU can share the negative busbar, further simplifying the negative wiring, reducing line voltage drop, and improving wiring standardization and system stability.

[0072] In some of these embodiments, Figure 3 This is a circuit diagram of the second preferred wiring configuration for the local control loop provided in this embodiment. Please refer to it. Figure 3 Based on the connection relationship in the aforementioned embodiment, in the local control loop, the first end of the first trigger switch is connected to the negative terminal of the power supply, and the second end of the first trigger switch is connected to the first control terminal; the first interface of the first execution terminal is connected to the first end of the first load, and the second interface of the first execution terminal is connected to the negative terminal of the power supply; the second end of the first load is connected to the positive terminal of the power supply.

[0073] When using the above wiring method, the first actuator is connected in series between the negative terminal of the power supply and the first load, controlling the on / off state of the first load by connecting or disconnecting the negative circuit. This wiring method is a negative control method, suitable for scenarios where the positive terminal of the load needs to be constantly energized and maintain a stable potential. It can better match the electrical characteristics of specific loads; at the same time, it can reduce interference caused by frequent switching of the positive line, improve the stability of circuit operation, and provide convenience for centralized wiring and unified management on the positive side of the power supply.

[0074] In some further embodiments, the negative control wiring method can avoid electrical spark interference caused by frequent switching of the positive line, adapt to the anti-interference requirements of precision electronic equipment in the simulation cabin, and improve electromagnetic compatibility.

[0075] In some of these embodiments, Figure 4 This is a circuit diagram of the PSU control circuit with integrated feedback control loop provided in this embodiment. Please refer to it. Figure 4The PSU also includes at least one feedback control loop for scenarios that require local control but whose status needs to be reported to the PLC, such as the passenger call function.

[0076] Each feedback control loop includes a second trigger switch, a second self-locking device, and a third load. The second self-locking device includes a second control terminal and a second execution terminal. The first terminal of the second trigger switch is connected to the second control terminal, enabling it to send a pulse signal to the second self-locking device when the second trigger switch is momentarily triggered, thus switching its on / off state. The first interface of the second execution terminal is connected to the first terminal of the third load. The second interface of the second execution terminal and the second terminal of the third load are respectively connected to the positive and negative terminals of the power supply, enabling the power supply circuit of the third load to be connected or disconnected after the second self-locking device is activated, thereby turning the third load on or off. The first terminal of the third load is also connected to the input terminal of the PLC, enabling it to feed back the status of the third load to the PLC for recording or interaction with other systems.

[0077] Based on the above connection relationship, the feedback control loop relies on the second self-locking device to achieve local independent self-locking control. There is no need for the PLC to participate in the triggering, holding and other control processes. The status reporting is achieved by taking the signal from the load end. Each channel occupies only one PLC input point, which greatly saves PLC point resources. At the same time, the feedback signal is directly taken from the load end, without the need to add additional sensors, detection chips or independent detection circuits. This simplifies the circuit structure and avoids signal errors caused by intermediate links, thereby improving the accuracy and reliability of status feedback.

[0078] In some further embodiments, based on the actual control requirements of each functional unit of the PSU in the cabin crew training simulation, the lighting components can be divided into three types: the first type is lights that only require local control and do not need to interact with the PLC, such as reading lights; the second type is lights that require local control and need to feed back the status to the PLC, such as passenger call lights; and the third type is lights that need to be centrally and uniformly controlled by instructors, such as no smoking lights and seatbelt fastening lights.

[0079] For the first type of lights, independent control can be achieved using the aforementioned local control loop, without requiring a PLC input point. For the second type of lights, only the signal transmission can be improved based on the local control loop, thus maintaining independent local control while feeding back the light's status to the PLC for status reporting; alternatively, the feedback control loop formed in the previous embodiments can be used. This design only occupies one PLC input point and does not require PLC participation in the control process. For the third type of lights, a direct control loop is used, driven directly by the PLC output, achieving unified control of the entire cabin.

[0080] Through the above-mentioned layered and differentiated design, the corresponding control loops can be flexibly adapted according to the functional attributes of different lamps. This not only fully meets the diverse and scenario-based control needs of the cabin crew training simulation cabin, but also minimizes the PLC point occupation to the greatest extent, solving the core pain point of insufficient PLC points when laying out a large-capacity full cabin PSU. At the same time, it simplifies the complexity of cabin wiring and improves the maintainability and operational stability of the entire control system.

[0081] In some further embodiments, Figure 5 This is a circuit diagram showing the preferred wiring of the feedback control loop provided in this embodiment. Please refer to it. Figure 5 In the feedback control loop, the first interface of the second actuator is connected to the first terminal of the third load, and the second interface of the second actuator is connected to the positive terminal of the power supply. This allows control of the power supply to the third load by connecting or disconnecting the positive circuit. The second terminal of the third load is connected to the negative terminal of the power supply; the first terminal of the third load is also connected to the input terminal of the PLC. The potential state of the first terminal of the third load can be directly fed back to the PLC as a status detection signal.

[0082] The above wiring method adopts a positive-pole control for the light and a common negative-pole ground architecture. The feedback signal is synchronized with the load power supply, with strong signal tracking and no delay, which can truly reflect the actual working status of the load. The common ground design can reduce the potential difference between different feedback loops, reduce signal crosstalk when there are multiple feedback loops, and adapt to the dense layout scenario of a single PSU equipped with multiple passenger call lights. In addition, the wiring is neat and the subsequent troubleshooting and feedback of anomalies are more efficient.

[0083] In some further embodiments, in the feedback control loop, the first interface of the second actuator is connected to the first end of the third load, and the second interface of the second actuator is connected to the negative terminal of the power supply, enabling control of the power supply to the third load by connecting or disconnecting the negative circuit. The second end of the third load is connected to the positive terminal of the power supply; the first end of the third load is also connected to the input terminal of the PLC, which is a load state change node, and its level changes synchronously with the on / off state of the load, enabling feedback of the actual working state to the PLC.

[0084] In the above wiring method, the feedback signal is taken from the dynamic node between the relay contact and the load, rather than directly from the positive terminal of the power supply. Therefore, it can accurately reflect the on / off state of the load and can be used in special electrical layout scenarios.

[0085] The above wiring method adopts a negative-pole control for the light and a positive-pole constant-on architecture. The continuous energization of the positive pole of the load can avoid potential fluctuations caused by frequent switching and prevent false triggering of feedback signals. It is especially suitable for passenger call scenarios with high signal accuracy requirements, and can eliminate the influence of electric sparks and electromagnetic interference on PLC input signals, ensuring zero false alarms in status reporting. At the same time, it meets the electrical withstand voltage requirements of special loads and extends the service life of loads and self-locking devices.

[0086] In some further embodiments, please continue to refer to Figure 5 A set of PSUs includes at least two feedback control loops, and each feedback control loop is set in parallel.

[0087] Specifically, the multiple feedback control loops are independent of each other. Each loop's second trigger switch, second self-locking device, and third load constitute a complete loop independently. The power input terminals of each loop are connected in parallel to the same set of positive and negative power supplies, and the feedback output terminals of each loop are connected to different input terminals of the PLC. This parallel configuration allows each feedback control loop to independently control the lighting and extinguishing of its corresponding load without interference. Simultaneously, each loop independently feeds back its status signal to the PLC, facilitating accurate identification of the operating status of each functional unit and enabling refined monitoring and management.

[0088] In some further embodiments, Figure 6 This is a schematic diagram of the linkage control of each feedback control loop provided in this embodiment. Please refer to it. Figure 6 The second control terminals of the second self-locking devices corresponding to each feedback control loop are interconnected, so that the feedback control loops form a linkage control.

[0089] Specifically, the second control terminals (i.e., the coil terminals or trigger input terminals of the second self-locking devices) of multiple feedback control loops are interconnected and then uniformly connected to the second trigger switch. When the second trigger switch of any feedback control loop is triggered, the trigger signal simultaneously acts on the second control terminals of all connected second self-locking devices, causing all loops to switch states synchronously. This linkage design ensures that the states of multiple third loads in a set of feedback control loops remain consistent, such as simultaneously lighting up or simultaneously turning off, meeting the needs of scenarios requiring multi-light linkage, such as passenger call lights. Furthermore, the aforementioned connection relationship allows for synchronous control of multiple loads without the need for a PLC, further reducing PLC usage and control logic complexity.

[0090] In some further embodiments, Figure 7 This is a simplified circuit diagram of the feedback control loop provided in this embodiment. Please refer to it. Figure 7 The linkage control of the feedback control loop can also adopt a simpler wiring form: only one second self-locking device is set up, and two or more second trigger switches are connected in parallel to each other and then connected to the second control terminal of the second self-locking device; at the same time, two or more third loads are connected in parallel to each other and then connected to the second execution terminal of the second self-locking device.

[0091] Based on the above circuit structure, multiple second trigger switches are connected in parallel to control the same second self-locking device. The output of one second self-locking device simultaneously controls multiple third loads connected in parallel, achieving a simplified linkage effect of a single relay driving multiple loads and multiple switches being triggered synchronously. This wiring method can further reduce the number of self-locking devices used, resulting in a simpler structure, less wiring, and higher reliability. It is particularly suitable for scenarios where multiple passenger call lights are controlled synchronously within the same PSU.

[0092] In some further embodiments, the feedback control loop is connected in parallel with the local control loop.

[0093] In further embodiments, the direct control loop, the aforementioned feedback control loop, and the aforementioned local control loop are all connected in parallel. Specifically, the power input terminals of each loop are connected in parallel to the same set of positive and negative power supplies, and the control signals and feedback signals of each loop are connected to the corresponding trigger switches or PLCs according to the loop type. By adopting a parallel configuration, each loop is electrically independent, and the failure or maintenance of any loop does not affect the normal operation of other loops, improving the overall reliability and maintainability of the system. At the same time, the parallel structure allows for flexible addition or reduction of the number of loops according to actual functional requirements without altering the existing wiring layout, providing convenience for the expansion and configuration adjustment of PSU functions.

[0094] In some further embodiments, the positive terminal of the direct control loop is connected to the output terminal of the PLC and powered separately by the PLC, rather than being directly connected to the positive terminal of the aforementioned power supply. This makes the on / off state of the direct control loop entirely controlled by the PLC, without relying on a local trigger switch, facilitating centralized control and status monitoring, while avoiding the impact of local control loop failures on the direct control loop.

[0095] In some further embodiments, both the first self-locking device and the second self-locking device are self-locking relays. The first control terminal and the second control terminal are both signal terminals of the corresponding self-locking relays, i.e., relay coils, used to receive trigger signals to control relay state switching. The first execution terminal and the second execution terminal are both contacts of the corresponding self-locking relays, used to connect or disconnect the load power supply circuit.

[0096] Based on the above connection relationship, a self-locking relay is used as the self-locking device. The coil is energized only during the state transition and does not require continuous power supply during the state maintenance period. It has low power consumption and low heat generation, making it suitable for long-term operation scenarios in the cabin crew training simulation cabin. At the same time, the electrical isolation between the relay contacts and the coil can realize the isolation between the low-voltage control circuit and the load power supply circuit, improving circuit safety and anti-interference capability. In addition, the relay contact capacity can be flexibly selected according to the load power to adapt to different power lamp components in the PSU, ensuring long-term reliable operation.

[0097] In some further embodiments, the second load is an indicator light, which may include different types such as a no-smoking indicator light and a seatbelt indicator light. Each type of indicator light can be connected to a different PLC output terminal for independent control. Indicator lights of the same type can be distributed in multiple PSUs, and the input terminals of the same type of indicator lights on each PSU can be connected in parallel to the same PLC output terminal. The output terminal of each indicator light is connected to the negative terminal of the power supply.

[0098] Based on the above connection relationship, multiple indicator lights of the same type on multiple PSUs are driven in parallel using the same PLC output terminal. This allows for synchronous control of all indicator lights of the same type throughout the cabin using only one PLC output point, further saving PLC point resources. Different types of indicator lights can be connected to different PLC output terminals to achieve independent zone control, meeting the flexible management needs of different training scenarios. Simultaneously, the parallel connection of multiple light input terminals and the common negative terminal of the output terminals simplify and standardize wiring, facilitating on-site wiring and ensuring that all indicator lights of the same type throughout the cabin light up or turn off synchronously, meeting the functional requirements of unified control.

[0099] In some preferred embodiments, Figure 8 This is a complete circuit diagram of the PSU control circuit provided in this embodiment. Please refer to it. Figure 8 Based on the aforementioned embodiments, the circuit structure and operating principle containing three types of circuits are fully described.

[0100] In this embodiment, a 24VDC common power supply is used, and a programmable logic controller (PLC) with digital input / output functionality is selected. A set of passenger service components, namely a set of PSUs, integrates four functional units: a first reading light, a first passenger call light, a first no-smoking light, and a first seatbelt fastening light, with corresponding local control loops, feedback control loops, and direct control loops.

[0101] The local control loop has a first load, such as a first reading light, including: reading light L3, reading light L4, and reading light L5. Each first reading light is configured with a moment-triggered push-button switch, i.e. Figure 8The first reading light switch shown includes: reading light switch K3, reading light switch K4, and reading light switch K5, and a first self-locking device including: self-locking device R3, self-locking device R4, and self-locking device R5. Taking reading light L3 as an example: the first end of reading light switch K3 is connected to the negative terminal of the common power supply, and the second end is connected to the coil of self-locking device R3; the first interface of the contact of self-locking device R3 is connected to the first end of reading light L3, and the second interface of the contact of self-locking device R3 is connected to the positive terminal of the common power supply; the second end of reading light L3 is connected to the negative terminal of the common power supply. When the flight attendant presses reading light switch K3 momentarily, the coil of self-locking device R3 is energized, the contacts close, and reading light L3 is energized through the positive circuit and illuminates; when reading light switch K3 is pressed again, the coil of self-locking device R3 is energized again, the contacts open, and reading light L3 goes out. The control principle of reading lights L4 and L5 is the same. The three local control loops are independent of each other, and the negative terminals share a common bus.

[0102] The feedback control loop includes a third load, such as a first passenger call indicator light, comprising passenger call indicator light L1 and passenger call indicator light L2. Passenger call indicator lights L1 and L2 are designed synchronously and equipped with instantaneously triggered push-button switches, i.e., first passenger call light switches, comprising passenger call light switches K1 and K2, and two second self-locking devices, comprising self-locking device R1 and self-locking device R2. The coils of self-locking devices R1 and R2 are interconnected and then connected to passenger call light switches K1 and K2, respectively. Taking passenger call indicator light L1 as an example: the first terminal of passenger call light switch K1 is connected to the negative terminal of the common power supply, and the second terminal is connected to the coil of self-locking device R1; the first interface of the contact of self-locking device R1 is connected to the first terminal of passenger call indicator light L1, and the second interface is connected to the positive terminal of the common power supply; the second terminal of passenger call indicator light L1 is connected to the negative terminal of the common power supply; simultaneously, the first terminal of passenger call indicator light L1 is connected to the I0.0 input point of the PLC. When the flight attendant presses the passenger call light switch K1 momentarily, the trigger signal simultaneously acts on the coils of self-locking devices R1 and R2, causing the contacts of self-locking devices R1 and R2 to close simultaneously, energizing and illuminating passenger call indicator lights L1 and L2. Pressing the passenger call light switch K1 again causes the contacts of self-locking devices R1 and R2 to open simultaneously, extinguishing passenger call indicator lights L1 and L2. The potential signal at the first terminal of passenger call indicator light L1 is fed back to input point I0.0 of the PLC, allowing the PLC to identify the passenger call status of the PSU. The first terminal of passenger call indicator light L2 is also connected to input point I0.1 of the PLC, allowing for independent identification; alternatively, the first terminal of passenger call indicator light L2 can be connected to input point I0.0 of the PLC, operating synchronously with passenger call indicator light L1 for synchronized identification. It should be understood that, for the sake of simplification in this embodiment, passenger call indicator L1 and passenger call indicator L2 are controlled synchronously, so they can share a feedback point or provide feedback separately.

[0103] The direct control loop includes a second load, such as a first "No Smoking" light and a first "Fasten Seatbelt" light. The first "No Smoking" light includes a "No Smoking" light L6; the first "Fasten Seatbelt" light includes a "Fasten Seatbelt" light L7. The "No Smoking" light L6 and the "Fasten Seatbelt" light L7 on the same PSU can be connected to different PLC outputs for independent control. The inputs of the same type of indicator lights on different PSUs can be connected in parallel to the same PLC output for unified control throughout the cabin. The outputs of both the "No Smoking" light L6 and the "Fasten Seatbelt" light L7 are connected to the negative terminal of the common power supply. When the instructor operates the corresponding switch in the cockpit, the corresponding output point of the PLC outputs a high level, energizing the corresponding indicator light; after the signal is canceled, the output point outputs a low level, and the indicator light goes out. It should be understood that the PLC is also connected to the "Fasten Seatbelt" switch K7 and the "No Smoking" switch K6 respectively, for corresponding control of the on / off state of the "Fasten Seatbelt" light L7 and the "No Smoking" light L6.

[0104] Overall Operating Principle: In this embodiment, the on / off control of reading lights L3, L4, and L5 is entirely completed locally on the PSU, without occupying any input or output points on the PLC. The on / off control of passenger call indicator lights L1 and L2 is also completed locally on the PSU, only feeding back status signals to the PLC through passenger call indicator lights L1 and L2, each occupying one PLC input point, or sharing one PLC input point when working synchronously. The no-smoking light L6 and seatbelt fastening light L7 on the same PSU can be controlled and powered separately. Similar indicator lights on different PSUs can be connected in parallel using the same PLC output point. Taking a cabin crew training simulator with 22 PSUs as an example, this embodiment requires a total of 22 PLC input points and 2 output points, saving over 90% of point resources compared to existing solutions, significantly reducing the number of lines, and significantly lowering the construction difficulty. At the same time, all PSUs in the cabin can achieve full functionality, realistically recreating the aircraft cabin environment. It should be understood that the terms "first," "second," and "third" mentioned in this embodiment refer to categories.

[0105] This embodiment provides a training simulation cabin, including: a seating area and a PSU control circuit as described in the foregoing embodiments.

[0106] The seating area includes at least one seat, and the corresponding PSU control circuit includes at least one PSU set, with the number of PSUs corresponding to the number of seats, so that each PSU is positioned above its corresponding seat. When a training environment recreating a realistic cabin scenario needs to be built, all seats are arranged according to the actual layout of the training simulation cabin, and PSUs corresponding to the total number of seats are configured synchronously, with each PSU set corresponding to a seat. This achieves full coverage deployment of PSUs throughout the cabin, with each PSU operating independently and connected to a unified PLC. Alternatively, they can be connected to a common power supply or have their individual PSU power supplies configured independently, meeting the needs of centralized management and independent control of each seat in a full cabin environment. In actual scenarios, each PSU set can be installed one by one above its corresponding seat.

[0107] It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. All other embodiments derived by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0108] Obviously, the accompanying drawings are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar situations based on these drawings without any creative effort. Furthermore, it is understood that although the work done in this development process may be complex and lengthy, for those skilled in the art, certain design, manufacturing, or production modifications made based on the technical content disclosed in this application are merely conventional technical means and should not be considered as insufficient disclosure of this application.

[0109] The term "embodiment" in this application refers to a specific feature, structure, or characteristic described in connection with an embodiment that may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily imply the same embodiment, nor does it imply that it is mutually exclusive with or independent of other embodiments. It will be clearly or implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0110] The above embodiments merely illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of patent protection. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application.

Claims

1. A PSU control circuit, characterized in that, Includes power supply, PLC and at least one PSU; Each group of PSUs includes: At least one local control loop includes a first trigger switch, a first self-locking device, and a first load; the first self-locking device includes a first control terminal and a first execution terminal; The first terminal of the first trigger switch is connected to the negative terminal of the power supply, and the second terminal of the first trigger switch is connected to the first control terminal. The first interface of the first execution end is connected to the first end of the first load, and the second interface of the first execution end and the second end of the first load are respectively connected to the positive and negative terminals of the power supply. At least one direct control loop includes a second load; a first end of the second load is connected to the output terminal of the PLC, and a second end of the second load is connected to the negative terminal of the power supply.

2. The PSU control circuit according to claim 1, characterized in that, The first interface of the first execution terminal corresponding to the local control loop is connected to the first terminal of the first load, and the second interface of the first execution terminal is connected to the positive terminal of the power supply. The second end of the first load is connected to the negative terminal of the power supply.

3. The PSU control circuit according to claim 1, characterized in that, The first interface of the first execution terminal corresponding to the local control loop is connected to the first terminal of the first load, and the second interface of the first execution terminal is connected to the negative terminal of the power supply. The second end of the first load is connected to the positive terminal of the power supply.

4. The PSU control circuit according to claim 1, characterized in that, The PSU also includes at least one feedback control loop; Each of the feedback control loops includes a second trigger switch, a second self-locking device, and a third load; the second self-locking device includes a second control terminal and a second execution terminal; The first terminal of the second trigger switch is connected to the second control terminal; The first interface of the second execution end is connected to the first end of the third load, and the second interface of the second execution end and the second end of the third load are respectively connected to the positive and negative terminals of the power supply. The first end of the third load is also connected to the input end of the PLC.

5. The PSU control circuit according to claim 4, characterized in that, The first interface of the second execution terminal corresponding to the feedback control loop is connected to the first terminal of the third load, and the second interface of the second execution terminal is connected to the positive terminal of the power supply. The second end of the third load is connected to the negative terminal of the power supply; the first end of the third load is also connected to the input terminal of the PLC.

6. The PSU control circuit according to claim 4, characterized in that, The feedback control loop is connected in parallel with the local control loop.

7. The PSU control circuit according to claim 4, characterized in that, The first self-locking device and the second self-locking device include: a self-locking relay; The first control terminal and the second control terminal include: the signal terminal of the corresponding self-locking relay; The first execution end and the second execution end include: the corresponding contacts of the self-locking relay.

8. The PSU control circuit according to any one of claims 4 to 5, characterized in that, A set of PSUs includes at least two feedback control loops, and each feedback control loop is arranged in parallel.

9. The PSU control circuit according to claim 8, characterized in that, The second control terminals of the second self-locking devices corresponding to each of the feedback control loops are interconnected.

10. A training simulation chamber, characterized in that, include: Seating area, including: at least one seat ； The PSU control circuit as described in any one of claims 1 to 9; include: The number of PSUs corresponds to the number of seats. Each PSU corresponds to the seat configuration.

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