A lighting control circuit for a helicopter cabin

Abstract

The present invention belongs to the technical field of helicopter electrical control, and specifically provides a helicopter cabin lighting control circuit with an additional independent battery, which can automatically switch to other independent battery power supplies in the case of total failure of the helicopter power supply, ensuring that the cabin lighting requirements are met and providing lighting for the pilot to control the helicopter after total power failure.

Description

Technical Field

[0001] The present invention belongs to the technical field of helicopter electrical control, and particularly relates to a helicopter cabin lighting control circuit. Background Art

[0002] Currently, helicopters are equipped with cockpit lights, cabin ceiling lights, and command lights. The ceiling lights are used for lighting the cockpit and cabin, and the command lights are usually used to notify the cockpit and cabin to fasten seat belts and prohibit smoking. The principle of helicopter cabin lighting is shown in Figure 1 , which mainly includes a cockpit ceiling light, a cabin ceiling light, a cockpit command light, a cabin command light, a power control switch, a ceiling light control switch, a no-smoking control switch, and a fasten-seat-belt control switch. The power control switch is connected to the cockpit ceiling light, the cabin ceiling light, the cockpit command light, and the cabin command light respectively through isolation diodes. The ceiling light control switch is connected to the cockpit ceiling light and the cabin ceiling light through isolation diodes. The no-smoking control switch is connected to the no-smoking icons of the cockpit command light and the cabin command light. The fasten-seat-belt control switch is connected to the fasten-seat-belt icons of the cockpit command light and the cabin command light.

[0003] Normally, the pilot controls the lighting or extinguishing of the cockpit ceiling light and the cabin ceiling light through the ceiling light control switch, controls the lighting or extinguishing of the no-smoking icons of the cockpit command light and the cabin command light through the no-smoking control switch, and controls the lighting or extinguishing of the fasten-seat-belt icons of the cockpit command light and the cabin command light through the fasten-seat-belt control switch.

[0004] When the normal power supply function of the helicopter fails, the on-board battery power supply is connected through the power control switch, and the cockpit ceiling light, the cabin ceiling light, the cockpit command light, and the cabin command light can be powered and illuminated simultaneously. To avoid the series connection of the power supplies of the dual-power supply circuits, the control circuit is isolated by diodes to ensure the isolation of the power supply of the ceiling lights and the command lights from the battery power supply.

[0005] Its disadvantages are as follows: Although the helicopter cabin lighting provides emergency power supply by the battery, the battery, as a part of the power supply, may also fail together with the main power supply. After all power supplies fail, the helicopter cabin lighting cannot be provided, which affects the pilot's control of the helicopter. Summary of the Invention

[0006] Object of the Invention: Design a helicopter cabin lighting control circuit and install an independent battery to ensure that when all power supplies of the helicopter fail, it can automatically switch to other independent battery power supplies to ensure that the cabin lighting requirements are met and provide lighting for the pilot to control the helicopter after all power supplies fail.

[0007] Technical solution: Provide a lighting control circuit for a helicopter cabin, including a cockpit command light 1, a cabin command light 2, a cockpit ceiling light 3, a cabin ceiling light 4, a lighting control switch 5, a command light control switch 6, a ceiling light control switch 7, a logic control device 8, a bistable relay 9, a second +14V battery 10, and a first +14V battery 11.

[0008] Among them, the lighting control switch 5 is connected to the input end of the logic control device 8, connected to the helicopter power supply and the first +14V battery 11, and connected to the command light control switch 6 and the ceiling light control switch 7. The two contacts of the command light control switch 6 are respectively connected to the cockpit command light 1 and the cabin command light 2 through isolation diodes. The two contacts of the ceiling light control switch 7 are respectively connected to the cockpit ceiling light 3 and the cabin ceiling light 4 through isolation diodes. The output end of the logic control device 8 is respectively connected to the "working" coil and the "off" coil of the bistable relay. The contacts of the bistable relay 9 are respectively connected to the second +14V battery 10 and the first +14V battery 11. The contacts of the bistable relay 9 are also respectively connected to the cockpit command light 1, the cabin command light 2, the cockpit ceiling light 3, and the cabin ceiling light 4 through isolation diodes.

[0009] Under the normal power supply state of the helicopter, when the lighting control switch 5 is placed in the "off" position, the "off" coil of the bistable relay 9 is controlled by the logic control device 8 in the circuit. The system automatically turns on the charging circuit, and the second +14V battery 10 and the first +14V battery 11 are charged through the helicopter +28V power supply. At this time, the command light control switch 6 and the ceiling light control switch 7 are placed in the "on" position, and the cockpit command light 1, the cabin command light 2, the cockpit ceiling light 3, and the cabin ceiling light 4 are not lit.

[0010] In the non-powered state of the helicopter, when the lighting control switch 5 is placed in the "test" position, the "working" coil of the bistable relay 9 is controlled by the logic control device 8 in the circuit. The second +14V battery 10 and the first +14V battery 11 are in series, and the battery outputs +28V power supply, directly supplying power to the cockpit command light 1, the cabin command light 2, the cockpit ceiling light 3, and the cabin ceiling light 4 to make them light up. At this time, even if the command light control switch 6 and the ceiling light control switch 7 are placed in the "off" position, the cockpit command light 1, the cabin command light 2, the cockpit ceiling light 3, and the cabin ceiling light 4 still remain lit and are not controlled by the switch. The "test" function is to verify whether the lighting control circuit works normally in the non-powered state of the helicopter.

[0011] When the helicopter is in normal power supply state and the lighting control switch 5 is placed in the "WORK" position, the "OFF" coil of the bistable relay 9 is controlled by the logic control device 8 in the circuit, and the system automatically turns on the charging circuit. The second +14V battery 10 and the first +14V battery 11 are charged through the helicopter +28V power supply. At this time, when the command light control switch 6 and the ceiling light control switch 7 are placed in the "ON" position, the cockpit command light 1, the cabin command light 2, the cockpit ceiling light 3, and the cabin ceiling light 4 are lit; when the command light control switch 6 and the ceiling light control switch 7 are placed in the "OFF" position, the cockpit command light 1, the cabin command light 2, the cockpit ceiling light 3, and the cabin ceiling light 4 are extinguished. In this state, if the helicopter power supply fails, the logic control device 8 automatically cuts off the power supply to the "OFF" coil of the bistable relay and turns on the power supply to the "WORK" coil. The second +14V battery 10 and the first +14V battery 11 are in series, and the battery outputs +28V power supply, directly supplying power to the cockpit command light 1, the cabin command light 2, the cockpit ceiling light 3, and the cabin ceiling light 4 to make them lit.

[0012] When the system is working properly, the lighting in the helicopter cabin is powered by the helicopter power supply system, and the helicopter power supply charges the independent battery. Once the helicopter power supply is lost due to some reason, the independent battery automatically powers the lighting devices in the helicopter cabin to ensure the normal operation of the lighting system in the helicopter cabin and facilitate the pilot to control the helicopter.

[0013] In the present invention, when the system is working properly, the lighting in the helicopter cabin is powered by the helicopter power supply system, and the helicopter power supply charges the independent battery. Once the helicopter power supply is lost due to some reason, the independent battery automatically powers the lighting devices in the helicopter cabin to ensure the normal operation of the lighting system in the helicopter cabin and facilitate the pilot to control the helicopter.

[0014] Technical effect: An independent battery control circuit is added to the lighting control circuit in the helicopter cabin, avoiding the situation that the main power supply of the helicopter fails to provide lighting power for the lighting in the helicopter cabin, resulting in the pilot being unable to accurately control the helicopter in the case of power failure. Description of the Drawings

[0015] Figure 1 The principle block diagram of the existing lighting in the helicopter cabin;

[0016] Figure 2 The principle block diagram of the "OFF" state of the lighting control switch of the present invention;

[0017] Figure 3 The principle block diagram of the "TEST" state of the lighting control switch of the present invention;

[0018] Figure 4 The principle block diagram of the "WORK" state of the lighting control switch of the present invention;

[0019] Figure 5 Principle block diagram of the power failure state of the present invention;

[0020] Figure 6 Control schematic diagram of the application circuit of a certain type of aircraft. Specific implementation manner

[0021] In the present invention, the cockpit ceiling light, the cabin ceiling light, the cockpit command light, and the cabin command light are still reserved in the helicopter cabin. The normal control circuit and the independent battery power supply circuit are isolated by isolation diodes respectively to avoid the series connection of the normal power supply and the independent battery power supply.

[0022] The following is a further detailed description in conjunction with the drawings. See Figure 2 .

[0023] In this embodiment, a lighting control circuit for a helicopter cabin is provided, including a cockpit command light 1, a cabin command light 2, a cockpit ceiling light 3, a cabin ceiling light 4, a lighting control switch 5, a command light control switch 6, a ceiling light control switch 7, a logic control device 8, a bistable relay 9, a second +14V battery 10, and a first +14V battery 11. Among them, the lighting control switch 5 is connected to the input end of the logic control device 8, connected to the helicopter power supply and the first +14V battery 11, and connected to the command light control switch 6 and the ceiling light control switch 7. The two contacts of the command light control switch 6 are respectively connected to the cockpit command light 1 and the cabin command light 2 through isolation diodes. The two contacts of the ceiling light control switch 7 are respectively connected to the cockpit ceiling light 3 and the cabin ceiling light 4 through isolation diodes. The output end of the logic control device 8 is respectively connected to the "working" coil and the "off" coil of the bistable relay. The contacts of the bistable relay 9 are respectively connected to the second +14V battery 10 and the first +14V battery 11. The contacts of the bistable relay 9 are also respectively connected to the cockpit command light 1, the cabin command light 2, the cockpit ceiling light 3, and the cabin ceiling light 4 through isolation diodes.

[0024] The working principle of the present invention is:

[0025] Combined with Figure 2 As shown, in the normal power supply state of the helicopter, when the lighting control switch 5 is placed in the "off" position, the "off" coil of the bistable relay 9 is controlled by the logic control device 8 in the circuit, and the system automatically turns on the charging circuit to charge the second +14V battery 10 and the first +14V battery 11 through the helicopter +28V power supply. At this time, the command light control switch 6 and the ceiling light control switch 7 are placed in the "on" position, and the cockpit command light 1, the cabin command light 2, the cockpit ceiling light 3, and the cabin ceiling light 4 are not lit.

[0026] Combined with Figure 3As shown, when the lighting control switch 5 is in the "Test" position in the non-powered state of the helicopter, the "Working" coil of the bistable relay 9 is controlled by the logic control device 8 in the circuit. The second +14V battery 10 and the first +14V battery 11 are in series, and the battery outputs a +28V power supply, directly powering the cockpit command light 1, the cabin command light 2, the cockpit ceiling light 3, and the cabin ceiling light 4 to make them light up. At this time, even if the command light control switch 6 and the ceiling light control switch 7 are in the "Off" position, the cockpit command light 1, the cabin command light 2, the cockpit ceiling light 3, and the cabin ceiling light 4 still remain lit and are not controlled by the switch. The "Test" function is to verify whether the lighting control circuit works properly in the non-powered state of the helicopter.

[0027] Combined with Figure 4 As shown, in the normal powered state of the helicopter, when the lighting control switch 5 is in the "Working" position, the "Off" coil of the bistable relay 9 is controlled by the logic control device 8 in the circuit, and the system automatically turns on the charging circuit to charge the second +14V battery 10 and the first +14V battery 11 through the helicopter +28V power supply. At this time, when the command light control switch 6 and the ceiling light control switch 7 are in the "On" position, the cockpit command light 1, the cabin command light 2, the cockpit ceiling light 3, and the cabin ceiling light 4 light up; when the command light control switch 6 and the ceiling light control switch 7 are in the "Off" position, the cockpit command light 1, the cabin command light 2, the cockpit ceiling light 3, and the cabin ceiling light 4 go out. In this state, combined with Figure 5 As shown, if the helicopter power supply is lost, the logic control device 8 automatically cuts off the power supply to the "Off" coil of the bistable relay and turns on the power supply to the "Working" coil. The second +14V battery 10 and the first +14V battery 11 are in series, and the battery outputs a +28V power supply, directly powering the cockpit command light 1, the cabin command light 2, the cockpit ceiling light 3, and the cabin ceiling light 4 to make them light up.

[0028] When the system works properly, the lighting in the helicopter cabin is powered by the helicopter power supply system and the battery is charged by the helicopter power supply. Once the helicopter power supply is lost due to some reason, the battery automatically powers the lighting devices in the helicopter cabin to ensure the normal operation of the cabin lighting system and facilitate the escape of the cabin personnel in case of emergency.

[0029] The control circuit of this embodiment has been installed and applied on a certain model. The specific control principle is as Figure 6 shown. On this model, 2 +14 batteries are used as the backup lighting power supply after the main power supply fails, which can ensure the lighting in the helicopter cabin after the helicopter power supply fails.

Claims

1. A helicopter cabin lighting control circuit, characterized in that, The control circuit includes a lighting control switch (5), an indicator light control switch (6), a ceiling light control switch (7), a logic control device (8), a bistable relay (9), a first power supply, and a second power supply; Among them, the lighting control switch (5) is respectively connected to the input end of the logic control device (8), the helicopter power supply, the first power supply, the indicator light control switch (6), and the ceiling light control switch (7); the first power supply is the first +14V battery (11), and the second power supply is the second +14V battery (10); The output end of the logic control device (8) is respectively connected to the "working" coil and the "off" coil of the bistable relay (9); the contacts of the bistable relay (9) are respectively connected to the first power supply and the second power supply, and are connected to the cockpit indicator light (1), the cabin indicator light (2), the cockpit ceiling light (3), and the cabin ceiling light (4); The indicator light control switch (6) is respectively connected to the cockpit indicator light (1) and the cabin indicator light (2); the ceiling light control switch (7) is respectively connected to the cockpit ceiling light (3) and the cabin ceiling light (4); By controlling the working states of the lighting control switch (5), the bistable relay (9), the indicator light control switch (6), and the ceiling light control switch (7), the lighting or extinguishing of the indicator lights and the ceiling lights is controlled; Under the normal power supply state of the helicopter, when the lighting control switch (5) is placed in the "off" position, the "off" coil of the bistable relay (9) is controlled by the logic control device (8) in the circuit to disconnect the lighting circuit and connect the battery charging circuit, and the +14V battery is charged by the helicopter +28V power supply.

2. The helicopter cabin lighting control circuit according to claim 1, characterized in that, The two-way contacts of the indicator light control switch (6) are respectively connected to the cockpit indicator light (1) and the cabin indicator light (2) through isolation diodes.

3. The helicopter cabin lighting control circuit according to claim 1, characterized in that, The two-way contacts of the ceiling light control switch (7) are respectively connected to the cockpit ceiling light (3) and the cabin ceiling light (4) through isolation diodes.

4. The helicopter cabin lighting control circuit according to claim 1, characterized in that, Under the non-powered state of the helicopter, when the lighting control switch (5) is placed in the "test" position, the "working" coil of the bistable relay (9) is controlled by the logic control device (8) in the circuit to connect the lighting circuit. The first power supply and the second power supply are in series, and the two power supplies output +28V power to supply power to the cockpit indicator light (1), the cabin indicator light (2), the cockpit ceiling light (3), and the cabin ceiling light (4) to make them light up; At this time, the cockpit indicator light (1), the cabin indicator light (2), the cockpit ceiling light (3), and the cabin ceiling light (4) remain lit and are not controlled by the indicator light control switch (6) and the ceiling light control switch (7).

5. The helicopter cabin lighting control circuit according to claim 1, characterized in that, Under the normal power supply state of the helicopter, when the lighting control switch (5) is placed in the "working" position, the "off" coil of the bistable relay (9) is controlled by the logic control device (8) in the circuit to connect the battery charging circuit, and the first power supply and the second power supply are charged by the helicopter +28V power supply; At this time, by controlling the on or off of the indicator light control switch (6) and the ceiling light control switch (7), the lighting or extinguishing of the cockpit indicator light (1), the cabin indicator light (2), the cockpit ceiling light (3), and the cabin ceiling light (4) is controlled.

6. The helicopter cabin lighting control circuit according to claim 5, characterized in that, When the lighting control switch (5) is placed in the "working" position, if the helicopter power supply fails, the logic control device (8) automatically cuts off the power supply to the "off" coil of the bistable relay (9) and turns on the power supply to the "working" coil; the first power supply and the second power supply are in series, outputting a +28V power supply, which directly powers the cockpit command light (1), the cabin command light (2), the cockpit ceiling light (3) and the cabin ceiling light (4).

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