Alarm method for safety pin of ejection seat

Abstract

The invention belongs to the technical field of aircraft system design, and relates to an ejection seat safety pin warning method, which is characterized in that a microswitch is arranged on a central pull ring support of an ejection seat and is used for outputting a position signal of a central pull ring safety pin on the seat; a safety pin support with a microswitch is placed in an aircraft cockpit and used for outputting a position signal of a central pull ring safety pin on the safety pin support, logic judgment is carried out by collecting the position signal of the safety pin and a cockpit cover state signal, an undercarriage state signal, a brake state signal and a throttle lever state signal, and the safety of the central pull ring is achieved. When a pilot forgets to plug and unplug the seat central pull ring safety pin, the seat central pull ring safety pin alarm device sends out an alarm signal to remind the pilot to perform corresponding operation, and safety is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft system design and relates to an ejection seat safety pin warning method. Background Art

[0002] To ensure safety during use and maintenance, a safety pin is installed on the central pull ring of the ejection seat. The central pull ring safety pin is pulled out before the aircraft slides out, and is inserted before the pilot exits the cabin after landing. At present, the seat central pull ring safety pin is usually inserted and removed by the pilot himself, which brings a problem: when the pilot forgets to insert and remove the seat central pull ring safety pin, the ejection cannot be started immediately in an emergency or the seat may be accidentally ejected when exiting the cabin. Therefore, when the pilot forgets to insert and remove the seat central pull ring safety pin, the aircraft should send a warning signal to remind the pilot. Summary of the invention

[0003] Purpose of the present invention:

[0004] The purpose of the present invention is to provide an ejection seat safety pin warning method, which is used to send out a warning signal when a pilot forgets to insert or remove the seat central pull ring safety pin, so as to remind the pilot to perform corresponding operations and improve safety.

[0005] The technical solution of the present invention:

[0006] An ejection seat safety pin warning method is provided, wherein a micro switch is arranged on a central pull ring support of the ejection seat, and is used for outputting a position signal of the central pull ring safety pin on the seat; a safety pin support with a micro switch is placed in an aircraft cockpit, and is used for outputting a position signal of the central pull ring safety pin on the safety pin support; the safety pin position signal is collected, and a logical judgment is performed with a canopy state, a landing gear state, a brake state, and a throttle lever state signal, and the judgment result is sent to a warning system to perform an ejection seat safety pin warning.

[0007] Furthermore, the ejection seat safety pin warning method includes a seat safety pin not inserted warning method, a seat safety pin not removed warning method and a seat safety pin position cannot be identified warning method.

[0008] The seat safety pin is not inserted. The warning method is:

[0009] The micro switch on the ejection seat central pull ring support did not output the position signal of the central pull ring safety pin on the seat, the aircraft was in the landing state and the canopy was in the open state, and the electromechanical management computer output the seat safety pin not inserted warning signal;

[0010] Seat safety pin not pulled out warning method:

[0011] When it is recognized that the aircraft starts to taxi, the safety pin support in the aircraft cabin does not output the position signal of the central pull ring safety pin on the safety pin support, and the electromechanical management computer outputs a seat safety pin not pulled out warning signal;

[0012] When the aircraft is identified as being in the ground test state, the electromechanical management computer does not output the seat safety pin not being pulled out warning signal;

[0013] Seat safety pin position cannot be identified warning method:

[0014] When it is identified that the seat center pull ring safety pin is neither on the seat nor on the support, the electromechanical management computer outputs a "seat safety pin" alarm.

[0015] Further, the electromechanical management computer outputs a seat safety pin not inserted warning signal as a warning level signal.

[0016] Furthermore, the warning signals for the front and rear cabin seats not being inserted are displayed independently, avoiding unnecessary warnings during single-cabin flight.

[0017] Furthermore, the seat safety pin not-pulled-out warning signal output by the electromechanical management computer is a warning-level signal.

[0018] Furthermore, the aircraft is in taxiing state when the following conditions are met at the same time:

[0019] (1) The landing gear is in the effective state;

[0020] (2) The canopy is not effective if it is not locked;

[0021] (3) The parking brake is ineffective;

[0022] (4) The throttle lever angle is greater than 18 degrees.

[0023] Furthermore, an aircraft is in the test run state when it meets the following conditions simultaneously:

[0024] (1) The landing gear is in the effective state;

[0025] (2) The canopy is not effective if it is not locked;

[0026] (3) The parking brake is effective;

[0027] (4) The throttle lever angle is greater than 18 degrees.

[0028] Furthermore, the warning displays for seats in the front and rear cabins of the aircraft that the safety pins have not been removed are independent of each other, avoiding unnecessary warnings during single-cabin flight.

[0029] Further, the electromechanical management computer outputs a "seat safety pin" warning signal as a warning level signal.

[0030] Beneficial effects of the present invention:

[0031] The present invention proposes an ejection seat safety pin warning method, which comprehensively judges whether the seat central pull ring safety pin is in a suitable position by identifying the seat central pull ring safety pin position signal, and sends a warning signal when the requirement is not met, thereby reducing the probability of error and improving the safety of the ejection seat during use and maintenance. The seat safety pin warning logic design of the present invention has been applied to a certain type of advanced trainer aircraft and is also applicable to other types of aircraft, and has a high promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a flowchart of the seat safety pin not inserted warning method;

[0033] Figure 2 This is a flowchart of the seat safety pin not being pulled out warning method;

[0034] Figure 3 This is a flowchart of the method for warning when the seat safety pin position cannot be identified. DETAILED DESCRIPTION

[0035] One embodiment of the present invention is: The technical solution of the present invention is to set a micro switch on the central pull ring support of the ejection seat to output the position signal of the central pull ring safety pin on the seat; place a safety pin support with a micro switch in the aircraft cabin to output the position signal of the central pull ring safety pin on the safety pin support. By collecting the position signal of the safety pin, a logical judgment is performed with signals such as the canopy status, landing gear status, brake status, throttle lever status, etc., and the judgment result is sent to the alarm system. The specific logic includes a seat safety pin not inserted alarm method, a seat safety pin not pulled out alarm method and a seat safety pin position cannot be identified alarm method.

[0036] The seat safety pin is not inserted. The warning method is:

[0037] The micro switch on the ejection seat central pull ring support does not output the position signal of the central pull ring safety pin on the seat, the aircraft is in the landing state and the canopy is in the open state, and the electromechanical management computer outputs the seat safety pin not inserted warning signal (warning level); The aircraft's front and rear cabin seat safety pin not inserted warning signals are displayed independently to avoid unnecessary warnings during single-cabin flight.

[0038] Seat safety pin not pulled out warning method:

[0039] When it is recognized that the aircraft starts to taxi, the safety pin support in the aircraft cockpit does not output the position signal of the central pull ring safety pin on the safety pin support, and the electromechanical management computer outputs a seat safety pin not removed alarm signal (warning level); among which, the aircraft is recognized to start taxiing when the aircraft meets the following conditions at the same time: the landing gear landing state is valid and the canopy is not locked, the parking brake is invalid, and the throttle lever angle is greater than 18 degrees.

[0040] When the aircraft is identified as being in the ground test state, the electromechanical management computer does not output the seat safety pin not pulled out warning signal (warning level). Among them, the aircraft is identified as being in the ground test state when the aircraft meets the following conditions at the same time: the landing gear landing state is valid and the canopy unlocking state is invalid, the parking brake is valid, and the throttle lever angle is greater than 18 degrees.

[0041] The warning displays for the front and rear cabin seats not being pinned out are independent of each other, avoiding unnecessary warnings during single-cabin flight.

[0042] Seat safety pin position cannot be identified warning method: To prevent the pilot from pulling out the central pull ring safety pin from the seat without inserting it into the cockpit safety pin support, that is, when it is identified that the seat central pull ring safety pin is neither on the seat nor on the support, the electromechanical management computer outputs a "seat safety pin" warning (caution level).

[0043] The seat safety pin not inserted warning method, the seat safety pin not pulled out warning method and the seat safety pin position cannot be identified warning method can only perform logical judgment when the aircraft landing gear is in a valid state, that is, when the aircraft is on the ground. Therefore, in order to prevent the micro switch from outputting an erroneous signal due to vibration or failure during flight in the air, it is also assumed that the pilot will not insert the seat center pull ring safety pin back into the seat in the air after pulling out the center pull ring safety pin from the seat on the ground, so no alarm is given in the air.

[0044] A second embodiment of the present invention is:

[0045] When the ejection seat of a certain type of aircraft is plugged with the central pull ring safety pin, the signal of the safety pin being inserted into the seat is valid, and the signal is invalid when it is pulled out; when the central pull ring safety pin is inserted into the cockpit safety pin support, the signal of the safety pin being inserted into the support is valid, and the signal is invalid when it is pulled out; the "cockpit cover is not locked" signal is used to determine whether the cockpit cover is closed and locked; the difference between the ground test run and the aircraft slide out lies in the state of the brake system, which is in the parking brake state during the ground test run and switches to the normal brake state before the aircraft slides out; the landing state of the landing gear is used to determine whether the aircraft is in the air; a certain type of aircraft is a twin-engine aircraft, and when the aircraft slides out, the throttle lever angle is greater than 18°. When the angle of the left engine throttle lever or the right engine throttle lever is greater than 18°, it is determined that the aircraft is ready to slide out. Therefore, the alarm logic of the seat safety pin of a certain type of aircraft is as follows:

[0046] 1. When the landing gear is in the effective state, the canopy is unlocked, and the seat safety pin insertion signal is invalid, the "seat safety pin is not inserted" alarm (warning level) is reported.

[0047] 2. When the landing gear is in the effective state, the canopy is unlocked, the parking brake is ineffective, any throttle lever angle is greater than 18°, and the safety pin is inserted into the seat signal is effective, the "seat safety pin is not pulled out" alarm (warning level) is reported.

[0048] 3. When the signal of the safety pin inserted into the seat is invalid and the signal of the safety pin inserted into the support is invalid, the "seat safety pin" alarm (caution level) is reported.

[0049] The present invention identifies the position signal of the seat central pull ring safety pin, comprehensively judges whether the seat central pull ring safety pin is in a suitable position, and sends out an alarm signal when the requirement is not met, thereby reducing the probability of error and improving the safety of ejection seat use and maintenance. The seat safety pin alarm logic design of the present invention has been applied to a certain type of advanced trainer aircraft and is also applicable to other types of aircraft, and has a high promotion value.

Claims

1. An ejection seat safety pin warning method, characterized in that: A micro switch is provided on the central pull ring support of the ejection seat to output the position signal of the central pull ring safety pin on the seat; a safety pin support with a micro switch is placed in the aircraft cockpit to output the position signal of the central pull ring safety pin on the safety pin support, and the safety pin position signal is collected and logically judged with the canopy status, landing gear status, brake status, and throttle lever status signals, and the judgment result is sent to the warning system to issue an ejection seat safety pin alarm.

2. The ejection seat safety pin warning method according to claim 1, characterized in that: The ejection seat safety pin warning method includes a seat safety pin not inserted warning method, a seat safety pin not removed warning method and a seat safety pin position cannot be identified warning method. The seat safety pin is not inserted. The warning method is: The micro switch on the ejection seat central pull ring support did not output the position signal of the central pull ring safety pin on the seat, the aircraft was in the landing state and the canopy was in the open state, and the electromechanical management computer output the seat safety pin not inserted warning signal; Seat safety pin not pulled out warning method: When it is recognized that the aircraft starts to taxi, the safety pin support in the aircraft cabin does not output the position signal of the central pull ring safety pin on the safety pin support, and the electromechanical management computer outputs a seat safety pin not pulled out warning signal; When the aircraft is identified as being in the ground test state, the electromechanical management computer does not output the seat safety pin not being pulled out warning signal; Seat safety pin position cannot be identified warning method: When it is identified that the seat center pull ring safety pin is neither on the seat nor on the support, the electromechanical management computer outputs a "seat safety pin" alarm.

3. The ejection seat safety pin warning method according to claim 2, characterized in that: The electromechanical management computer outputs a seat safety pin not inserted warning signal as a warning level signal.

4. The ejection seat safety pin warning method according to claim 2, characterized in that: The warning signals for the front and rear cabin seats not being plugged in are displayed independently to avoid unnecessary warnings during single-cabin flight.

5. The ejection seat safety pin warning method according to claim 2, characterized in that: The seat safety pin not removed warning signal output by the electromechanical management computer is a warning level signal.

6. The ejection seat safety pin warning method according to claim 2, characterized in that: The aircraft is in taxiing state when the following conditions are met at the same time: (1) The landing gear is in the effective state; (2) The canopy is not effective if it is not locked; (3) The parking brake is ineffective; (4) The throttle lever angle is greater than 18 degrees.

7. The ejection seat safety pin warning method according to claim 2, characterized in that: When the aircraft meets the following conditions at the same time, the aircraft is in the test state: (1) The landing gear is in the effective state; (2) The canopy is not effective if it is not locked; (3) The parking brake is effective; (4) The throttle lever angle is greater than 18 degrees.

8. The ejection seat safety pin warning method according to claim 2, characterized in that: The warning displays for the front and rear cabin seats not being pinned out are independent of each other, avoiding unnecessary warnings during single-cabin flight.

9. The ejection seat safety pin warning method according to claim 2, characterized in that: The electromechanical management computer outputs the "seat safety pin" warning signal as a warning level signal.

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