Method for reducing false alarm rate, computer program product and readable storage medium

Abstract

The present invention relates to a method for reducing the false alarm rate of a signal system, comprising the following steps: a classification step, in which multiple sensors within the signal system are classified into first-level sensors and second-level sensors; a receiving step, in which information from the multiple sensors is received; a judgment step, in which whether the information is abnormal information; an identification step, in which the level of the sensor that issued the abnormal information is identified; and a triggering step, in which a controller triggers different alarm messages according to a predetermined logic based on the level of the sensor that issued the abnormal information. In this way, by classifying multiple sensors, the type of abnormality can be determined based on the level of each sensor, thereby eliminating false alarms caused by sensor abnormalities. In addition, the present invention also relates to a computer program product and a computer-readable storage medium.

Description

Technical Field

[0001] The invention relates to a method for reducing the false alarm rate of a signal system, and is mainly used in a cabin door signal system of a civil aircraft.

[0002] In addition, the present invention also relates to a computer program product and a computer-readable storage medium capable of implementing this method. Background Art

[0003] With the implementation of the transport aircraft airworthiness standard CCAR25 R4, the cabin door signal system of new civil aircraft needs to use multiple high-precision proximity sensors to monitor the status of the cabin door.

[0004] For example, in the utility model patent filed by Qingan Group Co., Ltd. on April 30, 2020, entitled "A Door Alarm Device" and with the authorization announcement number CN212243777U, a door alarm device was proposed, including: an alarm controller, an alarm display panel, a cargo door control panel, a cargo door actuator, a proximity sensor, and a cable: each door of the aircraft is provided with the proximity sensor, each of which is connected to the alarm controller via a cable and sends the detection information to the alarm controller; each cargo door is also provided with the cargo door control panel and the cargo door actuator. A centralized structural layout is adopted to realize the status monitoring and alarm indication of the entire aircraft door.

[0005] In the invention patent entitled "An Advanced Aircraft Cabin Door Centralized Management System" submitted by Northwestern Polytechnical University on October 27, 2020, with application publication number CN112327686A, an advanced aircraft cabin door centralized management system was proposed. The system is based on multi-electric aircraft technology, electromechanical integrated management technology and bus technology. It consists of a cabin door centralized controller, a cabin door actuation subsystem, a cabin door control panel and a cabin door system bus. The cabin door centralized controller, cabin door actuation subsystem and cabin door control panel are interconnected through the cabin door system bus.

[0006] However, proximity sensors are highly sensitive due to their inductive nature. The interplay of various operating conditions, such as installation errors, mid-flight pressurization, and flight maneuvers, can cause variations in the gap between the sensor and the target, leading to changes in the inductance value. Once the warning threshold is exceeded, false alarms may occur, indicating that the aircraft's doors are open even when they are closed, latched, and locked, impacting airline operational efficiency and costs.

[0007] Although multi-sensor technology has been widely studied, the false alarm problem in the multi-sensor design applied to civil aircraft cabin door signal systems has not been solved.

[0008] Therefore, there is an urgent need to provide a method for reducing the false alarm rate of a signal system, which can overcome one or more shortcomings in the prior art. Summary of the Invention

[0009] The purpose of the present invention is to solve the following technical problem: when the aircraft door is closed, latched and locked, the cabin door signal system still issues false alarm indications and warnings that the cabin door is not closed, latched or locked, thereby affecting the dispatch of the aircraft.

[0010] According to one aspect of the present invention, a method for reducing the false alarm rate of a signaling system is provided. The signaling system can be used to monitor the status of an aircraft cabin door, and the method can include the following steps:

[0011] a classification step, in which a plurality of sensors in the signal system are classified into first-level sensors and second-level sensors;

[0012] a receiving step, in which information from a plurality of sensors is received;

[0013] A judgment step, in which it is judged whether the information is abnormal information;

[0014] an identification step of identifying the level of the sensor that issues the abnormal information; and

[0015] A triggering step, in which the controller triggers different alarm information according to a predetermined logic based on the level of the sensor that sends the abnormal information.

[0016] In this way, by grading multiple sensors, the type of abnormality can be determined based on the level of each sensor. For example, the priority of a first-level sensor can be higher than that of a second-level sensor, thereby at least partially eliminating false alarms caused by sensor abnormalities, thereby improving the operating efficiency of the airline and reducing operating costs.

[0017] According to the above aspects of the present invention, preferably, the alarm information includes hatch unsafe information, wherein the first-level sensor can be a sensor for sensing the final operating action, and in the triggering step, as long as the abnormal information is not issued by the first-level sensor, the hatch unsafe information will not be triggered.

[0018] This judgment logic controls the type of information sent based on the order of door operation and the hierarchy of sensors. As long as the first-level sensor that senses the last action and has a high priority does not send abnormal information, the aircraft will be allowed to be dispatched. This can shield false alarm information while ensuring the safety of the door, thereby improving operational efficiency.

[0019] According to the above aspects of the present invention, as the simplest control logic, preferably, when multiple sensors do not send abnormal information, the cabin door safety information is triggered, indicating that all actions related to cabin door closing have been completed correctly, thereby allowing the aircraft to be dispatched.

[0020] According to the above aspect of the present invention, preferably, the second-level sensor includes at least two sensors, and triggers the hatch door unsafe information when any of the following situations occurs:

[0021] Multiple sensors are reporting abnormal information; or

[0022] The first-stage sensor issues abnormal information, at least one of the second-stage sensors issues abnormal information, and at least one of the second-stage sensors does not issue abnormal information.

[0023] In this way, multiple sensors send out abnormal information indicating that all actions related to the door closing were not completed correctly. The first-level sensor sends out abnormal information and at least one second-level sensor sends out abnormal information, which can indicate that the last action or the previous action was not completed correctly. At this time, the aircraft is not allowed to be dispatched, thereby strictly distinguishing false alarm information from normal alarm information with actual abnormalities to ensure flight safety.

[0024] According to the above aspects of the present invention, preferably, the plurality of sensors include a closing sensor, a latching sensor, and a locking sensor, and in the grading step, the locking sensor is graded as a first-level sensor, while the closing sensor and the latching sensor are graded as second-level sensors. Typically, the order of door closing operations for a civil aircraft crew is door closing → latching → locking. The locking operation can only be performed after both the closing and latching operations are completed. Therefore, the last locking operation is designated as the first-level sensor, ensuring that the triggering logic is consistent with the door operation sequence, thereby achieving a desired balance between ensuring door security and improving aircraft dispatch efficiency.

[0025] According to the above aspect of the present invention, the method may further include a voting step, wherein the controller may trigger different warning messages based on the combination of the states of the closing sensor, the latching sensor, and the locking sensor. This voting step may be used to correct the information of the sensor that is presumed to have erroneous information based on predetermined judgment logic when the cabin door operation is completed sequentially and the states of multiple sensors are inconsistent. Only an advisory warning is issued, and no warning alarm is triggered, thereby preventing the dispatch of the aircraft from being affected by the sensor with erroneous information.

[0026] According to the above aspects of the present invention, preferably, the warning information may further include override information, and the override information may be triggered when any of the following situations occurs:

[0027] The lock sensor issues an abnormal signal, and neither the close sensor nor the latch sensor issues an abnormal signal; or

[0028] The locking sensor does not issue an abnormality message, and at least one of the closing sensor or the latching sensor issues an abnormality message.

[0029] Since the locking operation is the last step of the hatch door closing operation, if neither the closing sensor nor the latching sensor sends out abnormal information, and the closing sensor and the latching sensor still do not send out abnormal information after two consecutive samplings, it can be inferred that the hatch door is locked.

[0030] In addition, since the locking sensor has the highest priority and the information of the locking sensor can override the abnormal information of one of the closing sensor and the latching sensor (i.e., reduce the original alarm level, for example, from the warning level to the prompt level), the dispatch efficiency of the aircraft is improved.

[0031] According to the above aspects of the present invention, preferably, before triggering the override information, the hatch unsafe information may be triggered first, and when the state remains unchanged after two consecutive samplings, the hatch unsafe information is eliminated and the override information is triggered.

[0032] Through this setting, the information is reviewed and confirmed after two consecutive samplings, thereby further confirming the safety of the hatch.

[0033] According to another aspect of the present invention, a computer program product is provided, comprising a computer program / instruction, wherein the computer program / instruction implements the steps of the method according to one of the above aspects when executed by a processor.

[0034] According to another aspect of the present invention, a computer-readable storage medium is provided, on which a computer program / instruction is stored, wherein the computer program / instruction, when executed by a processor, implements the steps of the method according to one of the above aspects.

[0035] Therefore, the method of reducing the false alarm rate of the signal system of the present invention can meet the use requirements, propose an override control method suitable for the cabin door signal system of a civil aircraft, and reduce the probability of false alarm of the cabin door signal system, overcome the shortcomings of the existing technology and achieve the intended purpose. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to further clearly describe the method for reducing the false alarm rate of a signal system according to the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. In the accompanying drawings:

[0037] Figure 1 is a schematic diagram of a signaling system for monitoring the status of an aircraft door according to a non-limiting embodiment of the present invention;

[0038] Figure 2 is a schematic flow chart of a method for reducing a false alarm rate of a signaling system according to a non-limiting embodiment of the present invention;

[0039] Figure 3 is another schematic flow chart of a method for reducing a false alarm rate of a signaling system according to a non-limiting embodiment of the present invention;

[0040] Figure 4 is a schematic diagram of a signaling system for monitoring the status of an aircraft door in an override state according to a non-limiting embodiment of the present invention;

[0041] Figure 5 is a schematic diagram of a signaling system for monitoring the status of an aircraft cabin door in an unsafe cabin door state according to a non-limiting embodiment of the present invention;

[0042] Figure 6 is a schematic diagram of a signaling system for monitoring the status of an aircraft door in another override control state according to a non-limiting embodiment of the present invention;

[0043] Figure 7 is a schematic diagram of a voting mechanism in a voting step according to a non-limiting embodiment of the present invention; and

[0044] Figure 8 is a flow chart of control logic of a method for reducing a false alarm rate of a signal system according to a non-limiting embodiment of the present invention.

[0045] The above drawings are merely schematic and are not drawn strictly to scale.

[0046] List of reference numerals in the figures and embodiments:

[0047] 100-Methods for reducing the false alarm rate of signal systems, including;

[0048] 110-grading steps;

[0049] 120-receiving step;

[0050] 130-judgment step;

[0051] 140-Identification step;

[0052] 150-Trigger step;

[0053] 160-Voting Steps;

[0054] 200-plus sensors, including;

[0055] 201-turn off the sensor;

[0056] 202- latch sensor;

[0057] 203-lock sensor;

[0058] 300-Controller. DETAILED DESCRIPTION

[0059] It should be understood that, unless expressly stated to the contrary, the present invention may employ various alternative orientations and step sequences. It should also be understood that the specific devices shown in the drawings and described in the specification are merely exemplary embodiments of the inventive concepts disclosed and defined herein. Therefore, unless expressly stated otherwise, the specific orientations, directions, or other physical characteristics of the various disclosed embodiments should not be considered limiting.

[0060] Figure 1 is a schematic diagram of a signaling system for monitoring the status of an aircraft door according to a non-limiting embodiment of the present invention.

[0061] As shown in the figure, to comply with Section 25.783 of CCAR-25 R4, the airworthiness standard for transport category aircraft, civil aircraft are typically equipped with a signaling system for monitoring the status of aircraft cabin doors. This signaling system may include, for example, multiple sensors 200 disposed on the cabin door to detect whether the door is closed, latched, or locked. The crew's door closing operation sequence is generally: cabin door closed → cabin door latched (or locked) → cabin door locked (or locked).

[0062] Therefore, the locking operation must be performed after both the closing and latching operations are complete. Furthermore, the door opening operation is the reverse of the door closing operation. Once the door is opened, the lock sensor's state immediately changes from approaching to distant. Typically, the multiple sensors 200 may include a closing sensor 201, a latching sensor 202, and a locking sensor 203, respectively, to sense the completion of the door closing, latching, and locking operations.

[0063] The information / detection results of these sensors 201, 202 and 203 can be sent to the controller 300, where the controller 300 can process the information / detection results and send corresponding information to the cockpit for the pilot's reference, such as to the diagram page of the display system and / or the door display panel.

[0064] Sensors 201, 202, and 203 are typically high-precision proximity sensors, such as inductive sensors, with high accuracy and sensitivity. The interplay of various operating conditions, such as installation errors, mid-flight pressurization, and flight maneuvers, can affect the gap between the sensor and the target, leading to changes in the inductance value. Once the alarm threshold is exceeded, false alarms may occur, indicating that the aircraft door is not closed, latched, or locked, even though it is closed, latched, or locked. This impacts airline operational efficiency and costs.

[0065] To this end, the present invention proposes an override control method based on sensor voting results to reduce the false alarm rate.

[0066] Figure 2 is a schematic flow chart of a method 100 for reducing a false alarm rate of a signaling system according to a non-limiting embodiment of the present invention.

[0067] As shown in the figure and according to a non-limiting embodiment of the present invention, the method 100 for reducing the false alarm rate of a signal system may optionally include: a classification step 110 , a receiving step 120 , a determination step 130 , an identification step 140 and a triggering step 150 .

[0068] In the classification step 110 , for example, the plurality of sensors 200 in the signaling system may be classified into first-level sensors and second-level sensors.

[0069] For example, in an exemplary embodiment in which the plurality of sensors 200 of the signal system include a closing sensor 201, a latching sensor 202, and a locking sensor 203, in the grading step 110, the locking sensor 203 may be graded as a first-level sensor, while the closing sensor 201 and the latching sensor 202 may be graded as second-level sensors.

[0070] Herein, the priority of the first-level sensor may be higher than the priority of the second-level sensor, that is, when information of a first-level sensor conflicts with information of a second-level sensor, it may be inferred that the information of the first-level sensor is normal.

[0071] In the receiving step 120, information is received from a plurality of sensors 200. As an alternative to or in addition to the classification step 110, the controller 300 may classify the information from these sensors. That is, instead of classifying the sensors 200, the information from the corresponding sensors may be classified. It should be understood that both classification processes can achieve the desired classification effect.

[0072] In determination step 130 , a determination is made as to whether the information from the sensor is abnormal. For example, proximity information from the sensor may be considered normal information, while distance information from the sensor may be considered abnormal information. Specifically, proximity information from the sensor indicates that the sensor is approaching a target. For example, proximity information from the closing sensor 201 may indicate that the door is closed, proximity information from the latching sensor 202 may indicate that the door is latched, and proximity information from the locking sensor 203 may indicate that the door is locked.

[0073] Conversely, the distance information of these sensors 200 may indicate that the sensors are away from the target, thereby indicating that the closing, latching or locking of the hatch is not achieved, that is, the sensors will send abnormal information.

[0074] In the identification step 140 , the level of the sensor 200 that issues the abnormal information can be identified, thereby providing reference data for subsequent logical judgment, for example, identifying whether the sensor that issues the abnormal information is a first-level sensor or a second-level sensor.

[0075] In the triggering step 150 , the controller 300 may trigger different alarm information according to a predetermined logic based on the level of the sensor that issues the abnormal information. Non-limiting examples of the predetermined logic will be described in more detail below with reference to the accompanying drawings.

[0076] As a non-limiting example, the warning information may include cabin door unsafe information, and in the triggering step 150 , as long as the abnormal information is not issued by the first-level sensor (eg, the locking sensor), the cabin door unsafe information will not be triggered.

[0077] As mentioned above, this is because the locking sensor is usually used to sense the door locking operation after the door is closed and latched. Obviously, if the locking sensor has approached the target, it can be inferred that the secondary sensor has approached the target, thereby allowing the aircraft to be dispatched.

[0078] Thus, the method according to the present invention can identify sensor states with abnormal detection results and, in such cases, prevent the normal output of the door signaling system, automatically downgrading the warning level to trigger a low-level alarm (e.g., an advisory alarm). This method can also be referred to as an override control method for the door signaling system. In this case, the alarm information can also include override information, which the controller can transmit to the cockpit, for example, while simultaneously displaying information about the overridden sensor.

[0079] It should be understood that the method steps described above are illustrative, and those skilled in the art may reorganize, add certain method steps, or omit certain method steps as needed without departing from the scope of the present invention. For example, although the classification step 110 is shown as being performed first, alternatively, the receiving step 120 may be performed first, and the classification step may be performed thereafter, without affecting the implementation of the method according to the present invention.

[0080] According to the present invention, the warning information may include cabin door unsafe information and override information, wherein the cabin door unsafe information may be used as high-level warning information, and the override information may be used as low-level warning information.

[0081] Figure 3 is another schematic flow chart of a method 100 for reducing the false alarm rate of a signal system according to a non-limiting embodiment of the present invention. Figure 2 The method shown differs from: Figure 3 The method shown in FIG. 1 may further include a voting step 160 . In this voting step, the controller 300 determines whether to perform an override control.

[0082] According to a non-limiting embodiment of the present invention, for example, each sensor can be set to a state of "1" when it is close (i.e., close to the corresponding target) and a state of "0" when it is far away (i.e., far away from the corresponding target, indicating abnormal information). In this case, the various possible states of the closing sensor 201, the latching sensor 202, and the locking sensor 203 will constitute eight states: 000, 001, 010, 011, 100, 101, 110, and 111.

[0083] As an example, the state change of the hatch during the closing process may be 000→100→110→111.

[0084] For example, when the outputs of the three sensors are 0 (away), "DOOR UNSAFE" is output, and the schematic page and door display panel indicate that the door is not closed.

[0085] When the three sensors output 1 (close), the normal output is "Door Safety (DOOR SAFE)", the diagram page and the door display panel indicate that the door is closed

[0086] For other states, if any state triggers an alarm, the aircraft will frequently issue alarms during flight due to problems such as environmental pressurization. Therefore, a voting mechanism is designed based on the classification of sensors.

[0087] Since locking is the last step in closing the door (closing the door), it must be performed after both the closing and latching operations are complete. It is also the first step in opening the door. If the door is open, the state of the lock sensor 203 will be the first to change from 1 to 0. Therefore, this article defines the lock sensor 203 as the primary sensor (primary sensor), while the closing sensor 201 and the latch sensor 202 as the secondary sensors (secondary sensors).

[0088] For example, a value of 000 could indicate that the closing sensor 201, the latching sensor 202, and the locking sensor 203 are all away from their respective targets. This means that the multiple sensors 200 indicate that the door is not closed, latched, or locked. In this case, the controller 300 may issue a "DOOR UNSAFE" warning at the CAUTION level, and the cockpit diagram page and door display panel will indicate that the door is not closed. In this case, it is presumed that there is no false alarm, and aircraft dispatch is generally not permitted. In other words, a door unsafe message is triggered when multiple sensors 200 all emit abnormal information.

[0089] Conversely, 111 may indicate that the closing sensor 201, the latching sensor 202, and the locking sensor 203 are all near their respective targets, meaning the sensors indicate the door is closed, latched, and locked. In this case, the door is presumed to be secure, and the diagram page and door display panel indicate the door is closed. In other words, the door security message is triggered when none of the multiple sensors 200 emit an abnormality message.

[0090] In the above two cases, the status information of each sensor is consistent, and it can be considered that there is no false alarm.

[0091] For the other six states, if the most stringent method is adopted, an alarm will be triggered if any sensor output is 0. In this case, the aircraft will frequently issue alarms during flight due to problems such as environmental pressurization. Therefore, a voting mechanism is designed based on the classification of sensors.

[0092] In the voting step, the controller 300 may trigger different alarm messages based on a combination of the states of the first level sensor (eg, the lock sensor 203 ) and the second level sensor (eg, the closing sensor 201 , the latching sensor 202 ).

[0093] Figure 4 is a schematic diagram of an override control of a signaling system for monitoring the status of an aircraft door according to a non-limiting embodiment of the present invention.

[0094] As shown in the figure, when the important (higher priority) first-level sensor (e.g., the lock sensor 203) outputs 1 (approaching), no matter if one of the second-level sensors (e.g., the closing sensor 201, the latch sensor 202) outputs 0 (away), or all of them output 0 (away), the warning (CAUTION) level "DOOR UNSAFE" alarm is triggered first.

[0095] If the output of the lock sensor 203 is still 1 (close) after two consecutive samplings (e.g., two consecutive samplings within one information processing cycle), an override control is executed, downgrading the "DOOR UNSAFE" alarm to an information prompt level (INFO level) "XX SENSOR OVERRIDE" alarm, such as "CLOSING SENSOR OVERRIDE" or "LATCH SENSOR OVERRIDE." The schematic page and the door display panel indicate that the door is closed, and a fault message is sent to the onboard maintenance system for recording.

[0096] Similarly, when only one second-level sensor, such as closing sensor 201 or latching sensor 202, is in the Far state, but the first-level sensor (such as locking sensor 203) is in the Approach state, the door closing operation is considered complete and in place. The single sensor Far state is a false alarm, and the system will first trigger a warning-level "Door Unsafe" alarm. After two consecutive samplings (e.g., 30 seconds), the controller automatically eliminates the "Door Unsafe" alarm and triggers a low-level information-level "XX Sensor Override" alarm, completing the override control and allowing the aircraft to be dispatched. At the same time, the fault information is sent to the onboard maintenance system for recording. At this time, various display panels and pages will show that the Far state of the sensor is Approaching and the corresponding door state is Closed.

[0097] Combine Figure 4 The situation can be summarized as follows: if the first-level sensor (such as the locking sensor 203) does not issue an abnormal information, and at least one of the second-level sensors (such as the closing sensor 201 or the latching sensor 202) issues an abnormal information, an override information is issued and the prompt-level information "closing sensor override" or "locking sensor override" is triggered.

[0098] Figure 5 FIG. 1 is a schematic diagram of a signaling system for monitoring the status of an aircraft door according to a non-limiting embodiment of the present invention, showing the door in an unsafe state.

[0099] As shown in the figure, when the important (higher priority) first-level sensor (such as the lock sensor 203) outputs 0 (far away), and only one of the two second-level sensors (such as the closing sensor 201 and the latch sensor 202) outputs 1 (approaching), the warning level "DOOR UNSAFE" alarm is directly triggered, and the schematic page and the door display panel indicate that the door is not closed.

[0100] In other words, if the first-level sensor issues an abnormality message, at least one of the second-level sensors issues an abnormality message, and at least one of the second-level sensors does not issue an abnormality message, the hatch door unsafe message is triggered. That is, if the lock sensor 203 issues an abnormality message, and neither the close sensor 201 nor the latch sensor 202 issues an abnormality message, an override message is issued, and the warning-level message "lock sensor override" is triggered.

[0101] Figure 6 is a schematic diagram of a signaling system for monitoring the status of an aircraft door in another override control state according to a non-limiting embodiment of the present invention.

[0102] As shown in the figure, when the output of an important (higher priority) first-level sensor (such as the locking sensor 203) is 0 (far away) and the output of two second-level sensors (such as the closing sensor 201 and the latching sensor 202) is 1 (approaching), the warning-level "DOOR UNSAFE" alarm is triggered first. After two consecutive samplings, for example, two consecutive samplings within one information processing cycle, the outputs of the two second-level sensors are still 1, and none of the second-level sensors outputs 0 (far away), then override control is executed, and the "DOOR UNSAFE" alarm is downgraded to a "LOCKED SENSOR OVERRIDE" information prompt-level alarm. The schematic page and the door display panel indicate that the door is closed, and the fault information is sent to the onboard maintenance system for recording.

[0103] Figure 7 is a schematic diagram of a voting mechanism in a voting step according to a non-limiting embodiment of the present invention. Figure 7 In the above, combine Figure 4-6 The described sensor voting mechanisms are summarized.

[0104] As mentioned above, “0” or “1” for each sensor respectively indicates that the sensor is “far away” or “close” to the target, thereby corresponding to sensor abnormal information and normal information.

[0105] It should be understood that the method 100 for reducing the false alarm rate of the signal system as described above in conjunction with the accompanying drawings can be implemented by a computer program / instruction / software, and when the processor executes the program / instruction / software, all or part of the steps / processes of the method 100 can be reproduced.

[0106] Figure 8 1 is a flow chart of the control logic of the method for reducing the false alarm rate of a signal system according to a non-limiting embodiment of the present invention. Those skilled in the art can implement an algorithm for reducing the false alarm rate of a signal system based on the flow chart and implement the method flow through software.

[0107] As a non-limiting example, the software may be implemented as a computer software product that has been compiled for use with any processing engine / computer, including network devices such as servers. The computer software product may be stored on a non-transitory information storage medium, such as an optical disc (CD-ROM or DVD-ROM), a digital tape, a magnetic disk, a solid-state memory such as a USB flash drive, a ROM, or the like.

[0108] As mentioned above, writing the override control logic based on the sensor voting results into the software of the door signal system controller can achieve override control of the secondary sensors of the door signal system and reduce the false alarm rate.

[0109] Preferably, the computer program / instructions may be stored on a computer-readable storage medium, which may include a non-transitory storage medium that electronically stores information. The storage medium may include one or more of an optically readable storage medium, a charge-based storage medium (e.g., EEPROM, RAM, etc.), a solid-state storage medium (e.g., a flash drive, etc.), and / or other electronically readable storage medium. The electronic memory may store the voting mechanism algorithm, information determined by the processor, information received from the sensor, or other information that implements the functionality described herein.

[0110] As a non-limiting example, the controller 300 may include one or more microprocessors, microcontrollers, such as a central processing unit (CPU) and / or a graphics processing unit (GPU), which are programmed to perform their corresponding functions using software, i.e., one or more computer programs. In addition, the controller 300 may be embodied as a dedicated integrated circuit chip and / or some other type of very highly integrated circuit chip. Alternatively, the controller may take the form of a microprocessor or discrete electrical and electronic components. As described above, the controller 300 may receive information from a plurality of sensors 200 and process the information based on a predetermined logic, such as voting on the information, and sending the corresponding information to a display device in the cockpit according to the processing result.

[0111] The controller 300 may have memory (such as non-transitory computer readable media, RAM and / or ROM), an operating system, a display such as a fixed-style display, a data entry device such as a keyboard, a pointing device such as a "mouse", serial or parallel ports for attachment to other devices, a network card and connections to any network.

[0112] As used herein, terms indicating position or orientation, as well as terms indicating order, are intended solely to facilitate a better understanding of the present invention as presented in the preferred embodiments by those skilled in the art and are not intended to limit the present invention. Unless otherwise specified, all order, position, or orientation is used solely to distinguish one element / component / structure from another and, unless otherwise specified, does not imply any particular order, sequence of operations, direction, or orientation.

[0113] In summary, the method 100 for reducing the false alarm rate of a signal system according to an embodiment of the present invention overcomes the shortcomings of the prior art and achieves the intended purpose of the invention.

[0114] The method 100 for reducing the false alarm rate of a signaling system according to an embodiment of the present invention is based on a voting mechanism for sensor status classification, thereby classifying sensors into first-level sensors and second-level sensors based on the door operation process and sensor response. A vote is then performed based on the sensor status to determine whether to trigger the override control logic.

[0115] Furthermore, this method utilizes an override control design based on sensor voting results. This design automatically suppresses the warning-level "DOOR UNSAFE" alarm when the override logic conditions are met, triggering a lower-level "XX SENSOR OVERRIDE" informational alarm instead. This alarm also sends the fault information to the onboard maintenance system for logging. This reduces the probability of false alarms in the door signaling system.

[0116] Although the method for reducing the false alarm rate of a signal system of the present invention has been described above in conjunction with the preferred embodiments, it should be appreciated by those skilled in the art that the above examples are intended to be illustrative only and are not intended to limit the present invention. Therefore, various modifications and variations may be made to the present invention within the spirit and scope of the claims, and these modifications and variations will fall within the scope of the claims of the present invention.

Claims

1. A method (100) for reducing the false alarm rate of a signal system, wherein the signal system is used to monitor the status of an aircraft cabin door, characterized in that: The method comprises the following steps: a classification step (110), in which a plurality of sensors (200) in the signal system are classified into first-level sensors and second-level sensors; a receiving step (120), in which information from the plurality of sensors (200) is received; A judgment step (130), in which it is judged whether the information is abnormal information; an identification step (140), in which the level of the sensor that issues the abnormal information is identified; and a triggering step (150), in which the controller (300) triggers different alarm information according to a predetermined logic based on the level of the sensor that issues the abnormal information; Wherein, the alarm information includes hatch door unsafe information, wherein the first-level sensor is a sensor for sensing the final action during hatch door closing, and in the triggering step (150), as long as the abnormal information is not issued by the first-level sensor, the hatch door unsafe information will not be triggered.

2. The method (100) for reducing the false alarm rate of a signal system according to claim 1, characterized in that: When none of the multiple sensors (200) sends abnormal information, the door safety information is triggered.

3. The method (100) for reducing the false alarm rate of a signal system according to claim 1, characterized in that: The second-level sensors include at least two and trigger the hatch door unsafe information when any of the following situations occurs: The plurality of sensors (200) all emit abnormal information; or The first-level sensor issues abnormal information, at least one of the second-level sensors issues abnormal information, and at least one of the second-level sensors does not issue abnormal information.

4. The method (100) for reducing the false alarm rate of a signal system according to claim 1, characterized in that: The plurality of sensors (200) include a closing sensor (201), a latching sensor (202), and a locking sensor (203), and in the grading step (110), the locking sensor (203) is graded as a first-level sensor, while the closing sensor (201) and the latching sensor (202) are graded as second-level sensors.

5. The method (100) for reducing the false alarm rate of a signal system according to claim 4, characterized in that: The invention also includes a voting step (160), in which the controller (300) triggers different warning information based on the combination of the states of the closing sensor (201), the latching sensor (202) and the locking sensor (203).

6. The method (100) for reducing the false alarm rate of a signal system according to claim 5, characterized in that: The warning information also includes override information, and the override information is triggered when any of the following situations occurs: The locking sensor (203) issues an abnormality message, and neither the closing sensor (201) nor the latching sensor (202) issues an abnormality message; or The locking sensor (203) does not issue an abnormality message, and at least one of the closing sensor (201) or the latching sensor (202) issues an abnormality message.

7. The method (100) for reducing the false alarm rate of a signal system according to claim 6, characterized in that: Before triggering the override information, the hatch door unsafe information is first triggered, and when the state of the sensor remains unchanged after two consecutive samplings, the hatch door unsafe information is eliminated and the override information is triggered.

8. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

9. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

Images