Fire control device cold and hot start determination system and method

Abstract

The application discloses a cold and hot start determination system and method for a fireproof control device, and the method comprises single-channel cold and hot start determination and double-redundancy cold and hot start determination. The application also relates to a cold and hot start determination system for the fireproof control device, which comprises a signal acquisition unit, a bus communication unit and a logic control unit. The application can detect and identify non-power-off restart and fire alarm state restart of the fireproof control device, realizes quick air start and quick fire alarm state start of the fireproof control device, reduces fire alarm detection time, improves the timeliness of fire alarm, and guarantees the safety of aircraft personnel and equipment.

Description

Technical Field

[0001] This invention relates to a cold / hot start determination system and method for fire control devices, belonging to the field of aviation fire prevention and extinguishing. Background Technology

[0002] Aviation fires are a major threat to flight safety. Once a fire occurs, aircraft components will be severely damaged, seriously threatening the safety of passengers and crew. Due to the complexity of the internal structure of aircraft, various fire hazards exist, such as fuel leaks, short circuits, and hydraulic system failures, increasing the risk of fire.

[0003] Modern aircraft fire protection systems primarily include fire detection, fire alarm, and fire suppression functions. Fire control devices are the core components of these systems. Traditional fire control devices have long activation times and lack the ability to distinguish between cold and hot starts. With the continuous development of aviation technology, aircraft performance and safety requirements are becoming increasingly stringent. Fire protection systems need to possess rapid fire alarm response capabilities, enabling aircraft systems to quickly issue warnings and take fire suppression measures in the early stages of a fire. Summary of the Invention

[0004] Purpose of the invention: A cold / hot start determination system and method for fire prevention control devices are proposed. Compared with traditional fire prevention control devices, the method designed in this invention can realize rapid start-up of fire prevention control devices in the air and rapid start-up in fire alarm status, thereby improving the timeliness of fire alarm detection.

[0005] Technical solution: A fire protection control device cold and hot start determination system includes: a dual-redundant A-channel board and a B-channel board, each board containing an independent functional module unit: a signal acquisition unit, a bus communication unit, and a logic control unit; The signal acquisition unit, bus communication unit, and logic control unit are installed in the fire protection control device of the fire protection system. The signal acquisition unit includes an analog quantity acquisition module and a discrete quantity acquisition module. The signal acquisition unit is used to acquire the start voltage signal of the fire control device, the fire alarm detection voltage signal, and the discrete quantity signal of the aircraft wheel load, and transmit the data to the original data buffer after data processing. The logic control unit is used to read the start-up voltage signal, fire alarm detection voltage signal, and aircraft wheel load discrete signal from the original data buffer, and determine the cold / hot start status of this channel through a single-channel cold / hot start voting algorithm. The logic control unit is also used to obtain the cold / hot start status of another channel through the bus communication unit, and perform a dual-redundancy cold / hot start status determination as the final cold / hot start status. When the cold / hot start status is hot start, the logic control unit exits the start-up state, executes the fire alarm detection function, and decides whether to output the fire alarm detection signal.

[0006] The bus communication unit is used to read the cold and hot start status of this channel from the logic control unit, transmit the cold and hot start status of this channel via the internal bus, and obtain the cold and hot start status of the opposite channel.

[0007] Furthermore, the communication method between the bus communication units of the A-channel board and the B-channel board is CAN bus communication / UART bus communication.

[0008] Furthermore, the dual-redundant A-channel and B-channel boards can be powered by a single power supply or by multiple power supplies.

[0009] A method for determining the cold / hot start of a fire control device, the method being executed using the aforementioned fire control device cold / hot start determination system, the method comprising the following steps for any channel board: Step 1) The signal acquisition unit periodically acquires the fire protection system start-up voltage signal, fire alarm detection voltage signal, and aircraft wheel load discrete signal and stores them in the analog buffer and discrete buffer respectively; Step 2) The signal acquisition unit filters the acquired analog and discrete signals and stores the filtered data into the original data buffer; Step 3) The logic control unit embeds a single-channel cold and hot start voting algorithm to determine the cold and hot start status of the local channel after voting on the data obtained from the original data buffer. Step 4) Bus communication unit: When powered on, it performs bus communication synchronization between the local channel and the opposite channel, completes the cold and hot start status determination of the local channel, and sends the cold and hot start status of the local channel to the opposite channel through the internal bus, and periodically receives the cold and hot start status of the opposite channel. Step 5) The logic control unit embeds a dual-redundant cold and hot start voting algorithm. After obtaining the cold and hot start status of the opposite channel, the dual-redundant cold and hot start voting algorithm is used to vote on the cold and hot start status of the current channel and the cold and hot start status of the opposite channel to obtain the final cold and hot start status. Step 6) When the fire control device is in hot start state, it immediately performs the fire alarm detection function. When a valid fire alarm event is detected, it outputs an alarm discrete signal in real time to notify other systems of the aircraft that a fire alarm failure has occurred. Step 7) When the fire control device is in cold start state, it performs a power-on self-test and then performs the fire alarm detection function; when a valid fire alarm event is detected, it outputs a real-time alarm discrete signal to notify other systems of the aircraft that a fire alarm fault has occurred.

[0010] Further, in step 4), the cold / hot start status of this side channel is sent to the opposite side channel via the internal bus, and the cold / hot start status of the opposite side channel is received periodically, specifically as follows: The system sends the cold / hot start status of this channel to the opposite channel via the internal bus at least three times, and periodically receives the cold / hot start status of the opposite channel.

[0011] Further, step 2) specifically involves: the signal acquisition unit performing mean filtering on the acquired analog signal and sliding window filtering on the acquired discrete signal, and the signal acquisition unit storing the filtered data into the original data buffer.

[0012] Furthermore, the single-channel cold / hot start voting algorithm in step 3) is specifically as follows: When the starting voltage < V 启动 The wheel-borne discrete signal is "ground", and the fire alarm detection voltage is >V. 火警 At that time, the voting result for single-channel cold / hot start was cold start; When the starting voltage is ≥V 启动 The single-channel cold / hot start voting result is hot start; When the wheel load discrete signal is "out of the air", the single-channel cold / hot start voting result is hot start; When the fire alarm detection voltage is ≤V 火警 At that time, the voting result for single-channel cold / hot start was hot start.

[0013] Furthermore, the dual-redundancy cold / hot start voting algorithm in step 5) is specifically as follows: When the channel board uses a single power supply, the cold / hot start voting algorithm for dual-redundant channels is as follows: 1. If the cold / hot start on this side is a hot start, and the cold / hot start mode on the opposite side is also a hot start, the voting result for the cold / hot start of the dual-redundancy channel is a hot start; 2. If the cold start mode on this side is cold start or the cold start mode on the opposite side is cold start, the voting result for cold start in the dual-redundancy channel is cold start.

[0014] Furthermore, the dual-redundancy cold / hot start voting algorithm in step 5) is specifically as follows: When the channel board uses multiple power supplies, the cold / hot start voting algorithm for dual-redundant channels is as follows: 1. If the cold start mode on this side is cold start and the cold start mode on the other side is cold start, the voting result for cold start in the dual-redundancy channel is cold start; 2. If the cold / hot start on this side is a hot start or the cold / hot start mode on the opposite side is a hot start, the voting result for the cold / hot start of the dual-redundancy channel is a hot start.

[0015] Furthermore, in step 4), the bus communication unit first synchronizes the bus communication between its own channel and the opposite channel by exchanging heartbeat data when powered on, thereby improving the reliability of internal bus communication.

[0016] Beneficial effects of the invention: This invention enables the identification of cold and hot starts of fire prevention control devices, effectively identifying non-power-off restarts and fire alarm fault restarts, thus achieving rapid start-up of fire prevention control devices and solving the technical challenges of rapid air-to-ground and rapid fire alarm start-up of fire prevention control devices.

[0017] This invention improves the timeliness of fire alarms by shortening the total fire alarm detection time, enabling aircraft to issue alarms and take fire-fighting measures quickly in the early stages of a fire, thus effectively ensuring the safety of aircraft personnel and equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 Block diagram of the cold / hot start determination system for fire protection control devices; Figure 2 Signal acquisition and processing flowchart. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0022] In the description of this invention, it should be noted that the directions or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing and simplifying the invention, and should not be construed as limiting the invention. Furthermore, the use of ordinal numbers (e.g., "first and second," etc.) is for distinguishing objects and is not limited to this order, and should not be construed as indicating or implying relative importance.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly, encompassing both direct connection and indirect connection via an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0024] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited in each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0026] like Figure 1 A fire control device cold and hot start determination system includes: a dual-redundant A-channel board and a B-channel board, each board containing an independent functional module unit: a signal acquisition unit, a bus communication unit, and a logic control unit; The signal acquisition unit, bus communication unit, and logic control unit are installed in the fire protection control device of the fire protection system. The signal acquisition unit includes an analog quantity acquisition module and a discrete quantity acquisition module. The signal acquisition unit is used to acquire the start voltage signal of the fire control device, the fire alarm detection voltage signal, and the discrete quantity signal of the aircraft wheel load, and transmit the data to the original data buffer after data processing. The logic control unit is used to read the start-up voltage signal, fire alarm detection voltage signal, and aircraft wheel load discrete signal from the original data buffer, and determine the cold / hot start status of this channel through a single-channel cold / hot start voting algorithm. The logic control unit is also used to obtain the cold / hot start status of another channel through the bus communication unit, and perform a dual-redundancy cold / hot start status determination as the final cold / hot start status. When the cold / hot start status is hot start, the logic control unit exits the start-up state, executes the fire alarm detection function, and decides whether to output the fire alarm detection signal.

[0027] The bus communication unit is used to read the cold and hot start status of this channel from the logic control unit, transmit the cold and hot start status of this channel via the internal bus, and obtain the cold and hot start status of the opposite channel.

[0028] In one possible embodiment, the communication method between the bus communication units of the A-channel board and the B-channel board is CAN bus communication / UART bus communication.

[0029] In one possible embodiment, the dual-redundant A-channel and B-channel boards are powered by a single power supply or by multiple power supplies.

[0030] like Figure 2 A method for determining the cold / hot start of a fire control device, the method being executed using the aforementioned fire control device cold / hot start determination system, the method comprising the following steps for any channel board: Step 1) The signal acquisition unit periodically acquires the fire protection system start-up voltage signal, fire alarm detection voltage signal, and aircraft wheel load discrete signal and stores them in the analog buffer and discrete buffer respectively; Step 2) The signal acquisition unit filters the acquired analog and discrete signals and stores the filtered data into the original data buffer; Step 3) The logic control unit embeds a single-channel cold and hot start voting algorithm to determine the cold and hot start status of the local channel after voting on the data obtained from the original data buffer. Step 4) Bus communication unit: When powered on, it performs bus communication synchronization between the local channel and the opposite channel, completes the cold and hot start status determination of the local channel, and sends the cold and hot start status of the local channel to the opposite channel through the internal bus, and periodically receives the cold and hot start status of the opposite channel. Step 5) The logic control unit embeds a dual-redundant cold and hot start voting algorithm. After obtaining the cold and hot start status of the opposite channel, the dual-redundant cold and hot start voting algorithm is used to vote on the cold and hot start status of the current channel and the cold and hot start status of the opposite channel to obtain the final cold and hot start status. Step 6) When the fire control device is in hot start state, it immediately performs the fire alarm detection function. When a valid fire alarm event is detected, it outputs an alarm discrete signal in real time to notify other systems of the aircraft that a fire alarm failure has occurred. Step 7) When the fire control device is in cold start state, it performs a power-on self-test and then performs the fire alarm detection function; when a valid fire alarm event is detected, it outputs a real-time alarm discrete signal to notify other systems of the aircraft that a fire alarm fault has occurred.

[0031] In one possible embodiment, in step 4), the cold / hot start status of this side channel is sent to the opposite side channel via the internal bus, and the cold / hot start status of the opposite side channel is received periodically, specifically as follows: The system sends the cold / hot start status of this channel to the opposite channel via the internal bus at least three times, and periodically receives the cold / hot start status of the opposite channel.

[0032] In one possible embodiment, step 2) specifically involves: the signal acquisition unit performing mean filtering on the acquired analog signal and sliding window filtering on the acquired discrete signal, and the signal acquisition unit storing the filtered data into the original data buffer.

[0033] In one possible embodiment, the single-channel cold / hot start voting algorithm in step 3) is specifically as follows: When the starting voltage < V 启动 The wheel-borne discrete signal is "ground", and the fire alarm detection voltage is >V. 火警 At that time, the voting result for single-channel cold / hot start was cold start; When the starting voltage is ≥V 启动 The single-channel cold / hot start voting result is hot start; When the wheel load discrete signal is "out of the air", the single-channel cold / hot start voting result is hot start; When the fire alarm detection voltage is ≤V 火警 At that time, the voting result for single-channel cold / hot start was hot start.

[0034] In one possible embodiment, the dual-redundancy hot / cold start voting algorithm in step 5) is specifically as follows: When the channel board uses a single power supply, the cold / hot start voting algorithm for dual-redundant channels is as follows: 1. If the cold / hot start on this side is a hot start, and the cold / hot start mode on the opposite side is also a hot start, the voting result for the cold / hot start of the dual-redundancy channel is a hot start; 2. If the cold start mode on this side is cold start or the cold start mode on the opposite side is cold start, the voting result for cold start in the dual-redundancy channel is cold start.

[0035] In one possible embodiment, the dual-redundancy hot / cold start voting algorithm in step 5) is specifically as follows: When the channel board uses multiple power supplies, the cold / hot start voting algorithm for dual-redundant channels is as follows: 1. If the cold start mode on this side is cold start and the cold start mode on the other side is cold start, the voting result for cold start in the dual-redundancy channel is cold start; 2. If the cold / hot start on this side is a hot start or the cold / hot start mode on the opposite side is a hot start, the voting result for the cold / hot start of the dual-redundancy channel is a hot start.

[0036] In a possible embodiment, in step 4), when the bus communication unit is powered on, it first synchronizes the bus communication of the local channel and the opposite channel by exchanging heartbeat data, which improves the reliability of the internal bus communication.

[0037] The connection structure of the present invention will be described in detail below with reference to the drawings and embodiments.

[0038] The present invention provides a system and method for determining cold and hot starts of a fire protection control device. The system includes dual-redundancy boards: channel A board and channel B board. Each board includes an independent signal acquisition unit, a logic control unit, and a bus communication unit. The overall system diagram is shown in Figure 1 as shown.

[0039] When the fire protection control device product starts, the system first acquires analog and discrete signals, performs filtering processing, determines the cold and hot start states of the local channel, then exchanges the local and opposite states through the internal bus, and finally conducts a dual-redundancy cold and hot start state voting determination to obtain the final cold and hot start determination result. In the hot start state, the fire protection control device can be quickly started. The functional flow chart of the system is shown in Figure 2 as shown.

[0040] The signal acquisition unit of the fire protection control device includes an analog acquisition module and a discrete acquisition module. The analog acquisition module is used to periodically (T1) acquire the board startup voltage and the fire alarm detection voltage. By comparing the board startup voltage with the designed startup threshold voltage (V 启动 ), it can be identified whether the fire protection control device has restarted due to power failure; by comparing the fire alarm detection voltage with the fire alarm threshold (V 火警 ), it can be identified whether a fire has occurred when the fire protection control device starts. The discrete acquisition module is used to periodically (T2) acquire the aircraft wheel load signal to identify whether the current aircraft is in the air state.

[0041] The signal acquisition unit also includes a discrete filtering algorithm and an analog filtering algorithm. Discrete filtering algorithm: Continuously read the discrete sampling data N times. If M (M < N) times are exactly the same, the discrete quantity is considered valid; otherwise, the discrete quantity remains in the state before filtering. Analog filtering algorithm: For each analog channel, periodically read X analog sampling values and take the average value as the analog filtered sampling value for the current period.

[0042] After the bus communication unit of the fire protection control device completes the determination of the cold and hot start states of the local side, it sends the cold and hot start states of the local channel to the opposite channel through the internal bus. Considering the reliability of the bus communication, it should be sent at least 3 times, and the cold and hot start states of the opposite channel are received periodically (T3).

[0043] The logic control unit of the fire protection control device uses a single-channel cold and hot start voting judgment algorithm to determine the cold and hot start status of its own channel, and uses a dual-redundant cold and hot start voting judgment algorithm to make a comprehensive determination of the cold and hot start status of both sides.

[0044] Table 1

[0045] Based on Table 1, the main contents of the single-channel cold / hot start voting algorithm are as follows: 1. When the starting voltage is < V 启动 The wheel-borne discrete signal is "ground", and the fire alarm detection voltage is >V. 火警 At that time, the voting result for single-channel cold / hot start was cold start; 2. When the starting voltage is ≥ V 启动 The single-channel cold / hot start voting result is hot start; 3. When the wheel load discrete signal is "out of the air", the single-channel cold / hot start voting result is hot start; 4. When the fire alarm detection voltage is ≤ V 火警 At that time, the voting result for single-channel cold / hot start was hot start.

[0046] The dual-redundancy cold / hot start voting algorithm has the following two variations depending on the application scenario: Variation 1: Dual-redundant channel cold / hot start voting algorithm, applicable to single power supply scenarios, the main contents are: 1. If the cold / hot start on this side is a hot start, and the cold / hot start mode on the opposite side is a hot start, the voting result for the cold / hot start of the dual-redundancy channel is a hot start; 2. If the cold start mode on this side is cold start, or the cold start mode on the opposite side is cold start, the voting result for cold start in the dual-redundancy channel is cold start.

[0047] Variation 2: Dual-redundant channel cold / hot start voting algorithm, applicable to multi-power supply scenarios, the main contents are as follows: 1. If the cold start mode on this side is cold start and the cold start mode on the opposite side is cold start, the voting result for cold start in the dual-redundancy channel is cold start; 2. If the cold / hot start on this side is a hot start, or the cold / hot start mode on the opposite side is a hot start, the voting result for the cold / hot start of the dual-redundancy channel is a hot start.

[0048] When the dual-redundant channel cold / hot start voting result is hot start, the fire control device enters hot start mode, quickly executes the fire alarm detection function, and completes the fire alarm response in real time.

[0049] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A cold / hot start determination system for a fire prevention control device, characterized in that, include: The dual-redundant A and B boards each contain a signal acquisition unit, a bus communication unit, and a logic control unit. The signal acquisition unit is used to acquire the start voltage signal of the fire control device, the fire alarm detection voltage signal, and the discrete signal of the aircraft wheel load, and transmits the data to the raw data buffer after data processing. The logic control unit is used to read the start voltage signal, fire alarm detection voltage signal, and aircraft wheel load discrete signal, and to determine the cold or hot start status of this channel through a single-channel cold or hot start voting algorithm. It is also used to obtain the cold and hot start status of another channel through the bus communication unit, perform dual-redundant cold and hot start status determination, and use it as the final cold and hot start status; when the cold and hot start status is hot start, the logic control unit exits the start status, executes the fire alarm detection function and decides whether to output the fire alarm detection signal to the outside. The bus communication unit is used to read the cold and hot start status of this channel from the logic control unit, transmit the cold and hot start status of this channel via the internal bus, and obtain the cold and hot start status of the opposite channel.

2. The fire control device cold / hot start determination system according to claim 1, characterized in that, The communication units between the A and B boards use CAN bus / UART bus communication.

3. The fire control device cold / hot start determination system according to claim 1, characterized in that, Dual-redundant A and B boards can be powered by a single power supply or by multiple power supplies.

4. A method for determining the cold and hot start of a fire control device, characterized in that, Performed by means of the fire control device cold / hot start determination system according to any one of claims 1-3, the method for any board includes: 1) The signal acquisition unit periodically acquires the fire protection system start-up voltage signal, fire alarm detection voltage signal, and aircraft wheel load discrete signal and stores them in the buffer respectively; 2) The signal acquisition unit filters the acquired signal and stores it in the raw data buffer; 3) The logic control unit has an embedded single-channel cold and hot start voting algorithm. After voting on the data obtained from the original data buffer, the cold and hot start status of this channel is obtained. 4) When the bus communication unit is powered on, it performs bus communication synchronization between the local channel and the opposite channel, completes the cold and hot start status determination of the local channel, and sends the cold and hot start status of the local channel to the opposite channel through the internal bus, and periodically receives the cold and hot start status of the opposite channel. 5) The logic control unit has an embedded dual-redundant cold and hot start voting algorithm. After obtaining the cold and hot start status of the opposite channel, the dual-redundant cold and hot start voting algorithm is used to vote on the cold and hot start status of the current channel and the opposite channel to obtain the final cold and hot start status. 6) In hot start mode, immediately execute the fire alarm detection function, and when a valid fire alarm event is detected, output the alarm discrete signal in real time; 7) When the fire control device is in cold start state, it performs a power-on self-test and then performs a fire alarm detection function; when a valid fire alarm event is detected, it outputs an alarm discrete signal in real time.

5. The method for determining the cold and hot start of a fire control device according to claim 4, characterized in that, 4) Medium specific Send the cold / hot start status of this channel to the opposite channel at least 3 times, and periodically receive the cold / hot start status of the opposite channel.

6. The method for determining the cold and hot start of a fire control device according to claim 5, characterized in that, In step 2), the signal acquisition unit performs mean filtering on the acquired analog signals and sliding window filtering on the acquired discrete signals.

7. The method for determining the cold and hot start of a fire control device according to claim 6, characterized in that, 3) The specific algorithm for determining cold and hot starts in a single channel is as follows: When the starting voltage < V 启动 The wheel-borne discrete signal is "ground", and the fire alarm detection voltage is >V. 火警 At that time, the voting result for single-channel cold / hot start was cold start; When the starting voltage is ≥V 启动 The single-channel cold / hot start voting result is hot start; When the wheel load discrete signal is "air", the single-channel cold / hot start voting result is hot start; When the fire alarm detection voltage is ≤V 火警 At that time, the voting result for single-channel cold / hot start was hot start.

8. The method for determining the cold and hot start of a fire control device according to claim 7, characterized in that, 5) The dual-redundancy cold / hot start voting algorithm is as follows: When the board is powered by a single power supply: 1) If the cold / hot start on this side is a hot start, and the cold / hot start mode on the opposite side is a hot start, the voting result for the cold / hot start of the dual-redundancy channel is a hot start; 2) If the cold start mode on this side is cold start or the cold start mode on the opposite side is cold start, the voting result for cold start in the dual redundancy channel is cold start.

9. The method for determining the cold and hot start of a fire control device according to claim 7, characterized in that, 5) The dual-redundancy cold / hot start voting algorithm is as follows: When the board is powered by multiple power supplies: (1) If the cold start on this side is a cold start and the cold start mode on the opposite side is a cold start, the voting result of the dual redundancy channel cold start is a cold start; (2) If the cold / hot start on this side is a hot start or the cold / hot start mode on the opposite side is a hot start, the voting result of the dual redundancy channel cold / hot start is a hot start.

10. The method for determining the cold and hot start of a fire control device according to claim 6, characterized in that, 4) In the bus communication unit, when powered on, the local channel and the opposite channel are synchronized by exchanging heartbeat data.

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