A fire alarm control method and apparatus

Abstract

The application discloses a fire alarm control method and equipment, belongs to the technical field of fire alarm, and acquires smoke and temperature data through a detector, and acquires water mist system state data through an IO module; a main core board card processes and stores data, generates a matrix to adjust a warning value according to temperature in a specified time period in a carriage in the past, automatically gives a warning when the warning value is exceeded, and uploads alarm information; an ARIMA model is used to predict temperature according to water tank temperature data, and a platform is fed back when a set value is reached, and an authorized operation is performed. The equipment comprises a power supply, a double-core board card and other modules, a double bus is connected with the detector and the water mist system, and the main and standby core board cards are switched to ensure stability. The application solves the problems of separation of detection and fire extinguishing, easy false alarm and missed alarm of environmental temperature difference, and low efficiency of manual operation in the existing subway fire prevention and control, realizes automatic linkage, and improves the warning accuracy and operation reliability.

Description

Technical Field

[0001] This invention belongs to the field of fire alarm technology, specifically relating to a fire alarm control method and device. Background Technology

[0002] As the core carrier of underground public transportation, subways are characterized by high population density, enclosed spaces, and high mobility, making fire safety control a persistent challenge for the industry. Compared to above-ground buildings, subway fires exhibit the following significant characteristics:

[0003] First, rapid oxygen consumption: Combustion in a confined space rapidly consumes oxygen, leading to a sharp deterioration of the fire environment and threatening the lives of people.

[0004] Second, the toxicity and diffusion of smoke: Combustion produces a large amount of toxic and harmful gases (such as carbon monoxide, hydrogen cyanide, etc.), and the smoke diffuses rapidly, causing a sharp drop in visibility and hindering personnel evacuation and fire detection.

[0005] Third, smoke and heat dissipation are limited: the underground structure results in extremely weak natural smoke ventilation, and the accumulation of heat can easily cause flashover, which intensifies the spread of the fire.

[0006] Fourth, delayed fire response: Although traditional fire detectors (such as smoke and heat detectors) can monitor anomalies in real time, they require manual confirmation of the fire alarm and manual activation of the fire extinguishing system, resulting in low response efficiency and easy to miss the best time to extinguish the fire.

[0007] Fifth, the impact of environmental temperature differences: subway cars experience significant temperature differences due to seasonal and operating environment changes (such as high temperatures in summer and low temperatures in winter). Traditional fixed-threshold fire early warning mechanisms are easily affected by environmental interference, leading to false alarms or missed alarms.

[0008] Sixth, equipment maintenance pressure: Fine water mist fire extinguishing systems are at risk of liquid solidification in low-temperature environments (such as winter in the north), requiring manual real-time monitoring of the water tank temperature and manual start and stop of the heating device, resulting in high operation and maintenance costs and insufficient reliability.

[0009] Currently, subway fire prevention and control mainly relies on independent fire detection and extinguishing systems, lacking a coordinated control mechanism between the two. Specifically:

[0010] Separation of detection and fire suppression: Detectors only provide alarms; fire suppression requires manual intervention, failing to achieve automated "detection-alarm-fire suppression" linkage and delaying response time. Insufficient environmental adaptability: Traditional warning thresholds are fixed and cannot be dynamically adjusted according to seasonal temperature differences. For example, high summer temperatures can easily lead to false alarms, while low winter temperatures may cause missed early fire warnings. Inefficient equipment operation and maintenance: The pressure, liquid level, temperature, and other status parameters of the fine water mist system require manual inspection, lacking real-time monitoring and predictive capabilities, especially in low-temperature environments where it cannot provide early warnings of pipeline freezing risks. Summary of the Invention

[0011] To address these issues, this invention provides a fire alarm control method and equipment that solves problems such as the separation of detection and extinguishing in existing subway fire prevention and control systems, the susceptibility of false alarms and missed alarms due to environmental temperature differences, and the inefficiency of manual operation and maintenance. It achieves automated linkage between detection, alarm, and extinguishing, thereby improving the accuracy of early warning and the reliability of equipment operation and maintenance.

[0012] To achieve the above objectives, the present invention provides the following technical solution: a fire alarm control method, comprising the following steps:

[0013] Data Acquisition: Smoke concentration and temperature data related to the fire are collected through smoke detectors and heat detectors. Data on the status of the area valves, water pressure, liquid level, water temperature, and heating rod status of the fine water mist system are collected through the IO module.

[0014] Data processing: The main core board module processes the collected data, including checking data integrity and legality, cleaning, formatting, standardizing, and logical processing, and stores the processed data in the database;

[0015] Temperature warning adjustment: Identify temperature information in the carriage over a specified period of time, generate a temperature matrix, adjust the fire warning temperature value and alarm temperature value according to the temperature change trend, and automatically issue a warning when the collected temperature information exceeds the warning value, and generate fire alarm information to upload to the backend monitoring platform;

[0016] Water tank temperature prediction: Based on the temperature data of the water tank of the fine water mist system collected in the past specified time period, a temperature model is established using the ARIMA model in the spatiotemporal sequence prediction method to predict the water tank temperature information in the future set time period. When it is predicted that the temperature inside the water tank reaches the set heating value, the feedback is sent to the backend monitoring platform, and the heating mode of the water tank is turned on or off according to the authorization.

[0017] As a preferred solution for fire alarm control methods, the temperature warning adjustment includes:

[0018] The temperature matrix is ​​a sequence of temperature values ​​from the past 7 days. By analyzing the current temperature Temperature compared to the previous moment Difference trend adjustment warning value:

[0019] If the number of consecutive days is set The temperature has been determined to be rising, and the warning temperature value has been adjusted to [value missing]. :

[0020] ;

[0021] If the number of consecutive days is set The temperature has been determined to be dropping, and the warning temperature value has been adjusted to [value missing]. :

[0022] ;

[0023] In the formula, N is greater than 7, and A is the temperature warning value under normal temperature conditions.

[0024] As a preferred fire alarm control method, the ARIMA model in the water tank temperature prediction is based on the water tank temperature matrix of the past 7 days. Establish and predict temperature values The calculation formula is:

[0025] ;

[0026] ;

[0027] ;

[0028] In the formula, These are the weights of the temperature matrix; This is the average value within the temperature matrix; The bias error is calculated using the following formula:

[0029] ;

[0030] ;

[0031] In the formula, For the first Deviation error of the day, The deviation function is the average of the past seven days collected at a set time N.

[0032] The present invention also provides a fire alarm control device, which adopts the above-mentioned fire alarm control method, including a power supply module, a dual power supply current sharing / 24V power supply module, a main core board module, a backup core board module, an IO module, a CAN communication module, a switch module, an MVB module, and a back connection board.

[0033] The power supply module and the dual power supply current sharing / 24V power supply module are electrically connected. The dual power supply current sharing / 24V power supply module, the IO module, the CAN communication module, and the MVB module are all electrically connected to the main core board module. The dual power supply current sharing / 24V power supply module, the IO module, the CAN communication module, and the MVB module are all electrically connected to the backup core board module. The switch module and the main core board module are electrically connected.

[0034] When the main core board module is working normally, the backup core board module is not working. When the main core board module fails or crashes, the backup core board module takes over the work. After the main core board module recovers, the backup core board module does not return the work control to the main core board module.

[0035] As a preferred solution for fire alarm control equipment, the CAN communication module uses a first CAN bus to connect external smoke detectors and heat detectors;

[0036] The IO module is connected to a fine water mist system via a second CAN bus. The fine water mist system includes a zone valve, a pressure sensor, a liquid level sensor, a temperature sensor, and a heating rod.

[0037] As a preferred solution for fire alarm control equipment, the power module inputs 110V DC voltage from the vehicle and outputs 24V DC voltage.

[0038] The dual power supply current sharing / 24V power supply module receives the voltage output from the two power supply modules, selects the larger voltage and adjusts it to 24V output to supply power to the main core board module, the backup core board module, the IO module, the CAN communication module, the switch module, and the MVB module.

[0039] The maximum single-channel output current of the power module is kept below 4A, and the maximum main current is 8A. The power module is also equipped with a 24VDC power connector as a reserved interface for external 24VDC power supply equipment.

[0040] As a preferred solution for fire alarm control equipment, the main core board module includes a main core board module step-down circuit, a main core board module communication circuit, a main core board module memory circuit, a main core board module watchdog circuit, a main core board module EMMC circuit, a main core board module processor circuit, and a main core board module Ethernet circuit.

[0041] The main core board module's step-down circuit converts 24V to 3.3V to power the main core board module's communication circuit, memory circuit, watchdog circuit, EMMC circuit, processor circuit, and Ethernet circuit.

[0042] The main core board processor circuit uses a quad-core ARM Cortex-A55 RK3568J processor to process data and perform algorithm calculations;

[0043] The memory circuit of the main core board module uses a K4A8G165WCBITD chip to temporarily store data.

[0044] The main core board module EMMC circuit uses the KLMCG4JEUD-B04P chip to store system data.

[0045] The watchdog circuit of the main core board module monitors the status of the processor circuit of the main core board.

[0046] The main core board module communication circuit is connected to the main core board processor circuit to send and receive data.

[0047] The main core board's Ethernet circuit has a reserved interface that supports on-site debugging using a laptop.

[0048] As a preferred solution for fire alarm control equipment, the backup core board module includes a backup core board module microcontroller circuit, a backup core board module communication circuit, a backup core board module power supply circuit, a backup core board module IC2 storage circuit, a backup core board module reset circuit, and a backup core board module watchdog circuit.

[0049] The backup core board module power supply circuit converts 24V voltage to 3.3V voltage to power the backup core board module microcontroller circuit, the backup core board module communication circuit, the backup core board module IC2 storage circuit, the backup core board module reset circuit, and the backup core board module watchdog circuit.

[0050] The microcontroller circuit of the backup core board module uses APM32A407VGT7 as the main controller.

[0051] The communication circuit of the backup core board module uses a TD341SCAN isolated CAN transceiver to handle data transmission and reception.

[0052] The backup core board module IC2 storage circuit is a storage chip that does not lose data when power is off.

[0053] The backup core board module reset circuit monitors the voltage of the microcontroller circuit of the backup core board module.

[0054] The watchdog circuit of the backup core board module uses a MAX706 chip to monitor the status of the microcontroller circuit of the backup core board module.

[0055] As a preferred solution for fire alarm control equipment, the IO module includes an IO module main control circuit, an IO module watchdog circuit, an IO module communication circuit, an IO module power supply circuit, and an IO module interface circuit.

[0056] The IO module power supply circuit converts 24V voltage to 3.3V voltage to power the IO module main control circuit, the IO module watchdog circuit, the IO module communication circuit, and the IO module interface circuit.

[0057] The main control circuit of the IO module uses APM32A103RET7 to convert the collected analog signals of the fine water mist system into digital signals;

[0058] The watchdog circuit of the IO module monitors the status of the main control circuit of the IO module; the communication circuit of the IO module receives and sends data; and the interface circuit of the IO module is connected to the fine water mist system.

[0059] The IO module also has 8 relay inputs isolated by G3VM-61VY3 solid-state relays.

[0060] As a preferred solution for fire alarm control equipment, the MVB module includes an externally sourced MVB gateway and an MVB module control board;

[0061] The external MVB gateway is used to convert TTL signals to MVB signals;

[0062] The MVB module control board includes an MVB module power supply circuit, an MVB module MCU circuit, an MVB module watchdog circuit, an MVB module system power supply switch circuit, an MVB module reset circuit, an MVB module communication circuit, and an MVB module isolation circuit.

[0063] The power supply circuit of the MVB module adopts a two-step step-down method. First, it uses URB2405YMD to step down DC24V to DC5V, and then uses AMS1117-3.3 to step down to 3.3V. The power supply circuit of the MVB module supplies power to the MCU circuit, communication circuit, isolation circuit, and watchdog circuit of the MVB module.

[0064] The MVB module isolation circuit uses a high-speed coupler 6N137; the MVB module communication circuit uses a TD341 CAN transceiver; the MVB module reset circuit includes a coupler and a tactile switch.

[0065] The power supply switching circuit of the MVB module system includes a normally open relay and an AO3400 MOSFET.

[0066] The watchdog circuit of the MVB module is powered by 3.3V and is connected to the MCU circuit of the MVB module. It performs a reset operation after detecting that the MCU has crashed.

[0067] The MVB module MCU circuit is responsible for processing information data, receiving data information transmitted by the main core board module, and connecting with the external MVB gateway; when the main core board module loses power or crashes, the backup core board module briefly takes over the operation of the main core board module, transmits the processed data to the MVB module communication circuit, and uploads it to the vehicle monitoring system through the MVB module communication circuit.

[0068] As a preferred solution for fire alarm control equipment, the switch module includes a switch switching circuit, a switch interface circuit, and a switch voltage drop circuit.

[0069] The switch voltage drop circuit converts 24V to 3.3V to power the switch switching circuit and the switch interface circuit. The switch switching circuit uses the RTL8305NBI-CG 100Mbps switch chip, and the switch interface circuit reserves 6 interfaces isolated by a transformer.

[0070] The present invention has the following advantages:

[0071] First, the equipment features a dual-core redundancy design to ensure continuous and reliable system operation. When the primary core board module is working normally, the backup core board module goes into hibernation. When the primary module fails, crashes, or loses power, the backup module automatically takes over data processing and command issuance functions until the primary module recovers. This design avoids system paralysis caused by a single core failure, ensuring uninterrupted fire prevention and control throughout the entire process.

[0072] Secondly, the detection loop connects to smoke / heat detectors via a CAN bus to collect smoke concentration and temperature data in real time, transmitting it to the main core board for rapid processing. The fire extinguishing loop connects to a fine water mist system (area valves, pressure sensors, heating rods, etc.) via another CAN bus. When a fire alarm is detected, the main core board directly issues commands through the IO module to automatically open the valves or heating rods, achieving millisecond-level linkage between detection, alarm, and fire extinguishing without manual intervention. The processed data (such as valve status, water pressure, and warning information) is uploaded to the vehicle monitoring platform via the MVB module, while simultaneously receiving commands from the platform, forming a closed-loop control and improving emergency response efficiency.

[0073] Third, the system automatically adjusts warning thresholds, predicts water tank temperature, and triggers heating through algorithms, reducing the risk of human error. Automatic switching between primary and backup core boards and automatic reset of the hardware watchdog further reduce the frequency of manual inspections (for example, traditional systems require daily checks of water tank temperature, while this invention only requires weekly review of warning records). Real-time recording of fire alarms and fault information (such as detector malfunctions and valve jamming) is uploaded to the monitoring platform via the MVB bus, supporting historical data query and analysis to assist maintenance personnel in quickly locating problems and shortening fault handling time.

[0074] In summary, this invention systematically solves the core problems of "slow response, high false alarm rate, and difficult operation and maintenance" in traditional subway fire prevention and control through hardware redundancy, bus linkage, algorithm optimization, and anti-interference design. It realizes the upgrade from passive alarm to active prevention and control, significantly improves the safety level of public transportation, and has significant engineering application value and economic benefits. Attached Figure Description

[0075] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0076] Figure 1 This is a schematic diagram of the fire alarm control method provided in the embodiments of the present invention;

[0077] Figure 2 This is a schematic diagram of the overall architecture of the fire alarm control device provided in this embodiment of the invention;

[0078] Figure 3 This is a schematic diagram of the CAN communication module architecture of the fire alarm control device provided in this embodiment of the invention;

[0079] Figure 4 This is a schematic diagram of the dual-power current sharing / 24V power supply module architecture of the fire alarm control device provided in this embodiment of the invention;

[0080] Figure 5 This is a schematic diagram of the main core board module architecture of the fire alarm control equipment provided in this embodiment of the invention;

[0081] Figure 6 This is a schematic diagram of the core board module architecture of the fire alarm control equipment provided in this embodiment of the invention;

[0082] Figure 7 This is a schematic diagram of the IO module architecture of the fire alarm control device provided in this embodiment of the invention;

[0083] Figure 8 This is a schematic diagram of the MVB module architecture of the fire alarm control device provided in an embodiment of the present invention. Detailed Implementation

[0084] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0085] See Figure 1 This invention provides a fire alarm control method, comprising the following steps:

[0086] S1. Data Acquisition: Collects fire-related smoke concentration and temperature data through smoke detectors and heat detectors, and collects data on the status of regional valves, water pressure, liquid level, water temperature, and heating rod status of the fine water mist system through the IO module.

[0087] Specifically, the CAN communication module connects to external smoke and temperature detectors via the first CAN bus, enabling communication between the controller and these detectors. Analog signals collected by the detectors are transmitted via the CAN bus to the main core board module / backup core board module. The IO module connects to a fine water mist system (including zone valves, pressure sensors, level sensors, PT100, and heating rods) via the second CAN bus. Its main control circuit (APM32A103RET7) converts the collected analog signals (such as valve status and water pressure) into digital signals, which are then transmitted to the main core board module for data analysis via the back panel connector.

[0088] S2. Data Processing: The main core board module processes the collected data, including checking data integrity and legality, cleaning, formatting, standardizing, and logical processing, and then stores the processed data in the database.

[0089] Specifically, the processor circuit of the main core board module (RK3568J processor, quad-core ARM Cortex-A55) has powerful data processing capabilities, enabling it to quickly integrate and process large amounts of information and support algorithm calculations. The data processing flow includes: receiving data through the main core board module's communication circuit; the main core board processor calling the configuration file to perform integrity and validity checks, cleaning, and formatting operations on the data; and then storing the processed data in the database of the main core board module's EMMC circuit (KLMCG4JEUD-B04P chip).

[0090] S3. Temperature Warning Adjustment: Identifies temperature information in the carriage over a specified period of time, generates a temperature matrix, adjusts the fire warning temperature value and alarm temperature value according to the temperature change trend, automatically issues a warning when the collected temperature information exceeds the warning value, and generates fire alarm information to be uploaded to the backend monitoring platform.

[0091] During the temperature warning adjustment process:

[0092] The temperature matrix is ​​a sequence of temperature values ​​from the past 7 days. By analyzing the current temperature Temperature compared to the previous moment Difference trend adjustment warning value:

[0093] If the number of consecutive days is set The temperature has been determined to be rising, and the warning temperature value has been adjusted to [value missing]. :

[0094] ;

[0095] If the number of consecutive days is set The temperature has been determined to be dropping, and the warning temperature value has been adjusted to [value missing]. :

[0096] ;

[0097] In the formula, N is greater than 7, and A is the temperature warning value under normal temperature conditions.

[0098] During implementation, the ambient temperature inside the train carriage over the past 7 days was collected to generate a temperature matrix. The algorithm automatically adjusts the warning value by analyzing temperature change trends (warming or cooling): when the summer temperature rises, the warning temperature value is appropriately increased as the ambient temperature rises; when the winter temperature falls, the warning temperature value is appropriately decreased as the ambient temperature falls, avoiding false alarms due to weather conditions. When the collected temperature exceeds the adjusted warning value, an automatic warning is issued; if it exceeds the alarm value, a fire alarm is generated and uploaded to the backend monitoring platform via the MVB module.

[0099] S4. Water Tank Temperature Prediction: Based on the collected temperature data inside the water tank of the fine water mist system over a specified period of time, a temperature model is established using the ARIMA model in the spatiotemporal sequence prediction method to predict the water tank temperature information for a set period of time in the future. When the predicted temperature inside the water tank reaches the set heating value, feedback is sent to the backend monitoring platform, which then decides whether to turn on or off the heating mode of the water tank based on authorization.

[0100] In the process of predicting water tank temperature, the ARIMA model is based on the water tank temperature matrix of the past 7 days. Establish and predict temperature values The calculation formula is:

[0101] ;

[0102] ;

[0103] ;

[0104] In the formula, These are the weights of the temperature matrix; This is the average value within the temperature matrix; The bias error is calculated using the following formula:

[0105] ;

[0106] ;

[0107] In the formula, For the first Deviation error of the day, The deviation function is the average of the past seven days collected at a set time N.

[0108] During implementation, water tank temperature data was collected via an external fine water mist system (PT100). The ARIMA model was used to analyze the temperature data from the past seven days to establish a temperature prediction model. The model calculates the weights of the temperature matrix (…). ) and bias error ( Predict future temperatures. When it is predicted that the water tank temperature may be lower than the set value (such as approaching the freezing point), the data is uploaded to the backend monitoring platform. Based on authorization, the heating rod is automatically turned on or a warning is issued, realizing the prediction and control of the water tank temperature and reducing the need for manual monitoring.

[0109] See Figure 2 This invention also provides a fire alarm control device using the fire alarm control method described in the above embodiments. The control device includes a power module, a dual-power current sharing / 24V power supply module, a main core board module, a backup core board module, an I / O module, a CAN communication module, a switch module, an MVB module, and a back-end connection board. The power module and the dual-power current sharing / 24V power supply module are electrically connected. The dual-power current sharing / 24V power supply module, I / O module, CAN communication module, and MVB module are all electrically connected to the main core board module. The dual-power current sharing / 24V power supply module, I / O module, CAN communication module, and MVB module are all electrically connected to the backup core board module. The switch module and the main core board module are electrically connected. When the main core board module is working normally, the backup core board module is not working. When the main core board module fails or crashes, the backup core board module takes over the operation. After the main core board module recovers, the backup core board module does not relinquish control to the main core board module.

[0110] The rear connection board only features rear connectors, voltage traces, and communication traces; it contains no other components and serves only as a wiring and bottom support. The power module, dual power supply current sharing / 24V power supply module, main core board module, backup core board module, IO module, CAN communication module, switch module, and MVB module all have connector plugs corresponding to the rear connectors on the rear connection board. The switch module and main core board module have reserved Ethernet communication. The other modules connect the CAN bus, power line, and ground line via connector plugs, which are then crimped to the rear connectors on the rear connection board to achieve CAN bus communication and voltage transmission.

[0111] The power module receives a 110V DC input from the vehicle and outputs a 24V (-15% to +10%) DC voltage. The fire alarm control equipment uses a dual-power module, which operates independently. If one power module fails and has no output voltage, the other continues its voltage conversion function. If both power supplies operate simultaneously, the output voltages 24V1 and 24V2 from both power modules are connected to the dual-power current sharing / 24V supply module. The larger voltage is selected and regulated to output a 24V DC voltage. This dual-power current sharing / 24V supply module can then power other modules. This output voltage is current-limited, ensuring the maximum single-channel output current remains below 4A. The dual-power current sharing / 24V supply module has a 24VDC power connector, which is a reserved interface for connecting other 24VDC-powered electrical equipment as an external power source if needed.

[0112] The main core board module is equipped with a processor, which quickly integrates and processes large amounts of information and can perform algorithmic calculations. The backup core board module temporarily takes over the work after the main core board module crashes, ensuring the operation of the entire system. Once the main core board module recovers, the backup core board module relinquishes control, and the main core board module takes over the work. The IO module connects to an external water mist system (including area valves, pressure sensors, level sensors, PT100, and heating rods), converting the collected status information, water pressure, level information, water temperature, and heating rod status information—all analog signals—into digital signals. After data processing by the core board, the data is uploaded to the vehicle's backend monitoring platform via the MVB module. The CAN communication module connects to external detection devices (temperature detectors, smoke detectors) via a bus, performing communication functions between the control equipment and the external detectors. The CAN bus is accessed and led out through this module. The circuit design includes surge protection, grounding protection, and a dual-path current protection circuit, keeping the single-path current below 2A and performing multiple filters to suppress electromagnetic interference, protecting the circuit from external electromagnetic interference.

[0113] The switch module uses an Ethernet chip, primarily to reserve an Ethernet port for easy connection of other devices as needed. It also allows for convenient and quick on-site debugging using a laptop. The MVB module uses an external gateway for TTL-to-MVB conversion, while another part uses a custom-designed circuit to collect information from various sub-devices, communicate with the controller, and issue time synchronization commands. The IO module connects to an external fine water mist system (including zone valves, pressure sensors, level sensors, PT100, and heating rods), collecting analog information from various devices and transmitting it to the main core board module after digital-to-analog conversion. The MVB module uploads the processed information from the main core board to the vehicle monitoring platform for monitoring by staff. When the backend monitoring platform returns an execution command, the MVB module receives it and transmits it to the main core board module. After analyzing the command, it is transmitted to the IO module to issue command information to externally connected devices.

[0114] In one possible embodiment, the CAN communication module uses a first CAN bus to connect to a smoke detector and a temperature detector; the IO module connects to a fine water mist system via a second CAN bus. The fine water mist system includes a zone valve, a pressure sensor, a liquid level sensor, a temperature sensor, and a heating rod.

[0115] See Figure 3 Specifically, the CAN communication module is designed with a step-down circuit and a current monitoring circuit, mainly relying on the XL4016E1 voltage converter and the WCS2702 Hall current sensor. The CAN communication module connects to external smoke detectors and temperature detectors. Its main function is to connect to the rear connector on the back panel via a connector plug, introducing the CAN bus to the back panel for bus routing, thus establishing the communication loop. Simultaneously, it provides current protection to prevent excessive current from burning out the circuit. A dual-power current sharing / 24V power supply module provides 24V to the CAN communication module. This voltage is converted to 5V DC by the XL4016E1 voltage converter. The 5V output is directly connected to the voltage input terminal of the WCS2702 Hall current sensor. The maximum current monitored by the Hall current sensor is 2A. If the current exceeds this value, the power supply is automatically cut off to protect the circuit. If the current does not exceed the upper limit, the signal is filtered by a transformer before being transmitted to the bottom connector.

[0116] In one possible embodiment, the power module receives the vehicle's 110V DC voltage and outputs 24V DC voltage; the dual power supply current sharing / 24V power supply module receives the voltages output from the two power modules, selects the larger voltage and adjusts it to 24V output to power the main core board module, backup core board module, IO module, CAN communication module, switch module, and MVB module; the maximum single-channel output current of the power module is kept below 4A, and the maximum main current is 8A. The power module also has a 24VDC power connector as a reserved interface for powering external 24VDC powered electrical equipment.

[0117] Specifically, the power module used is the URF1D24FB-400WHR3, with an input voltage range of 43-160VDC and an output of 24VDC, delivering 400W of power. The filter uses FL2D-60-402 for interference suppression at the power input. The power module itself has a heatsink, and while maintaining the input voltage within a certain range, its power consumption is relatively low compared to similar power modules. The built-in heatsink effectively dissipates heat, reducing the impact of temperature on electrical equipment.

[0118] See Figure 4 The dual power supply current sharing / 24V power supply module consists of a voltage comparison circuit, a voltage regulation and current protection circuit 1, a voltage regulation and current protection circuit 2, and a voltage regulation and current protection circuit 3.

[0119] The power module output voltage is connected to a dual-power current sharing / 24V power supply module. Since there are two power modules, they operate independently. If one power module fails, the other will regulate the voltage and output a 24V DC current. If both power supplies operate simultaneously, voltage comparison is required. The power module output voltage is 24V (-15% to +10%), within its fluctuation range. After conversion by the two power modules, voltages 24V1 and 24V2 are connected to the dual power supply current sharing / 24V power supply module. The two input voltages 24V1 and 24V2 are judged. When 24V1 > 24V2, 24V1 is used as the supply voltage, and the maximum output current is 8A. At the same time, the voltage of 24V1 is regulated so that its output is DC24V. If 24V1 < 24V2, then 24V2 is used as the supply voltage, and the maximum output current is 8A. At the same time, the voltage of 24V2 is regulated so that its output is DC24V. If 24V1 = 24V2 = 24VDC, then the supply voltage is 24V, and the main current can withstand a maximum voltage of 8A. The voltage regulation & current protection circuit 1, voltage regulation & current protection circuit 2, and voltage regulation & current protection circuit 3 are three parallel voltage regulation circuits that can output 24V voltage. These three circuits are designed in parallel, and the condition of one circuit does not affect the other two circuits. This detector is designed with two CAN buses, and the power supply is provided by the two CAN buses. This module is designed with three outputs, and one output is reserved to be led out through the terminal housing aviation plug, which can be used as a DC24V power supply to connect other electrical equipment.

[0120] The voltage regulation and current protection circuit uses the XL4016E1 power management chip. This chip can accept 8V~36V voltage and is suitable for accepting floating voltages of 24V1 and 24V2. It has the advantages of high current output, short circuit protection, and overcurrent protection. The voltage regulation and current protection circuit outputs 24VDC. It is designed using WCS2705a with adjustable resistors. The maximum current that a single channel can withstand is 4A, and the maximum current that the main current can withstand is 8A.

[0121] The power management chip and adjustable resistors are used to adjust the voltage to DC 24V. A three-way power supply design is employed to balance current distribution within the overall product. Excessive current could damage components, and high power consumption would generate excessive heat. The current is divided into three paths, each monitored by a WCS2705a Hall effect current sensor. When any of the three paths experiences a current exceeding 4A, a protection mechanism is triggered, cutting off the power. The three current protection circuits operate independently; a short circuit in one path will allow the others to function normally. This design maximizes circuit safety and minimizes power consumption.

[0122] In one possible embodiment, the main core board module includes a main core board module step-down circuit, a main core board communication circuit, a main core board memory circuit, a main core board watchdog circuit, a main core board eMMC circuit, a main core board processor circuit, and a main core board Ethernet circuit; the main core board module step-down circuit converts 24V voltage to 3.3V voltage to power the main core board module communication circuit, main core board module memory circuit, main core board module watchdog circuit, main core board module eMMC circuit, main core board processor circuit, and main core board Ethernet circuit; the main core board... The card processor circuit uses a quad-core ARM Cortex-A55 RK3568J processor to process data and perform algorithm calculations; the main core board module memory circuit uses a K4A8G165WCBITD chip for temporary data storage; the main core board module EMMC circuit uses a KLMCG4JEUD-B04P chip to store system data; the main core board module watchdog circuit monitors the status of the main core board processor circuit; the main core board module communication circuit is connected to the main core board processor circuit for data transmission and reception; the main core board Ethernet circuit has a reserved interface to support on-site debugging with a portable computer.

[0123] See Figure 5 Specifically, the main function of the core board module is to rapidly process data and control external detectors and the fine water mist system. The DC24V power supply for the core board module is provided by a dual-power current sharing / 24V power supply module. An EC5SBW-24S12 chip converts DC24V to DC12V, and a SY8113B chip converts DC12V to DC5V. A DC5V power supply chip, RK809-5, converts the voltage from DC5V to 3.3V. The DC24V to DC12V, DC12V to DC5V, and DC5V to DC3.3V circuits together constitute the main core board module's step-down circuit. Because it involves powering the main core board's processor circuit, EMMC circuit, and memory circuit, the RK809-5 is used to convert DC5V to DC3.3V to stabilize the power supply voltage and current, and to provide overload and overheat protection mechanisms. The main core board features a 3.3V power supply, single-channel communication circuit, memory circuit, watchdog circuit, EMMC circuit, processor circuit, and Ethernet circuit. All chips used in the circuit design have a temperature range of -40℃ to 85℃, making them more suitable for the rail transportation industry.

[0124] The main core board module's communication circuit connects to the main core board's processor circuit to receive and send data. The main core board module's watchdog circuit monitors the processor's status using voltage; when the feedback voltage drops below a threshold, it resets the main core board's processor circuit. The main core board module's memory circuit uses the K4A8G165WCBITD as its core design, which boasts high-speed data processing capabilities up to 2666Mbps, along with low power consumption and a wide operating temperature range, making it particularly suitable for the rail transit field. The main core board module's memory circuit exchanges data with the main core board's processor circuit; the processor circuit processes the data, while the memory stores temporary data. The main core board module's EMMC circuit uses the KLMCG4JEUD-B04P, characterized by high reliability, low power consumption, and a wide operating temperature range, further enhancing its suitability for the rail transit field. The EMMC stores system data; when data access is needed, the main core board's processor circuit issues a command, and the main core board module's EMMC circuit then transmits the data. The Ethernet circuit of the main core board is powered by 3.3V. When electrical devices need to connect via Ethernet, it receives data, and then the processor circuit of the main core board performs data analysis.

[0125] The RK3568J processor is a quad-core ARM Cortex-A55, with each core clock speed reaching 1.8GHz / 2.0GHz. All components involved in the core board circuitry designed based on the RK3568J utilize industrial-grade solutions. It operates within a wide industrial-grade temperature range of -40℃ to 85℃. The RK809-5 is suitable for multi-core system applications, integrating power management, dynamic voltage regulation, and low-power design. The main function of the main core board's watchdog timer is to prevent program crashes or infinite loops. When the watchdog circuit detects an anomaly in the main core board module, it will restart. During program crashes in the main core board module, the backup core board module will terminate data processing to ensure stable and normal system operation.

[0126] In one possible embodiment, the backup core board module includes a backup core board module microcontroller circuit, a backup core board module communication circuit, a backup core board module power supply circuit, a backup core board module IC2 storage circuit, a backup core board module reset circuit, and a backup core board module watchdog circuit; the backup core board module power supply circuit converts 24V voltage to 3.3V voltage to power the backup core board module microcontroller circuit, backup core board module communication circuit, backup core board module IC2 storage circuit, backup core board module reset circuit, and backup core board module watchdog circuit. The backup core board module's watchdog circuit provides power; the backup core board module's microcontroller circuit uses an APM32A407VGT7 as the main controller; the backup core board module's communication circuit uses a TD341SCAN isolated CAN transceiver for data transmission and reception; the backup core board module's IC2 storage circuit is a storage chip that does not lose data when power is off; the backup core board module's reset circuit monitors the voltage of the backup core board module's microcontroller circuit; the backup core board module's watchdog circuit uses a MAX706 chip to monitor the status of the backup core board module's microcontroller circuit.

[0127] See Figure 6 The main function of the backup core board module is to temporarily receive and process data and issue commands after the main core board crashes. The backup core board module includes a backup core board microcontroller circuit, a backup core board communication circuit, a backup core board power supply circuit, a backup core board IC2 storage circuit, a backup core board reset circuit, and a backup core board watchdog circuit.

[0128] The backup core board module uses an APM32A407VGT7 as the main controller, a MAX706 chip for status monitoring in the watchdog circuit, and a TD341SCAN transceiver in the communication circuit. The backup core board module uses an EC7AW18-72S05 and an AMS1086 for power supply, a MAX809 chip for reset circuit, and a MAX706 chip for watchdog circuit.

[0129] The backup core board module's power supply circuit consists of two parts. First, a power supply converts DC24V to DC5V. Then, a step-down chip converts DC5V to DC3.3V. After these two step-downs, the 3.3V voltage powers the backup core board module's microcontroller circuit, communication circuit, IC2 storage circuit, reset circuit, and watchdog circuit. The backup core board's IC2 circuit uses a data storage chip that retains data even after power loss, providing enhanced stability. It stores and retrieves data. The backup core board module's reset circuit monitors the voltage of the microcontroller circuit. When the voltage falls below a threshold, it immediately sends a reset signal to ensure the circuit's normal operation. The backup core board module's watchdog circuit monitors the status of the microcontroller circuit. When it detects that the microcontroller circuit is stuck or malfunctioning, it immediately performs a circuit reset. The backup core board module's communication circuit is responsible for sending and receiving data. The backup core board module's microcontroller circuit processes the data, and then the processed data is transmitted to the MVB module for uploading to the vehicle's backend monitoring system.

[0130] The APM32A407VGT7 chip features a 32-bit Arm® Cortex®-M4 core in its FPU, operating at a maximum frequency of 168MHz. Its powerful information processing capabilities make it ideal as the main control chip for core modules in fire alarm control equipment. The TD341SCAN is a CAN repeater with isolated power supply. This device provides differential transmit and receive capabilities for the bus and CAN controller respectively, with a signal transmission rate of up to 1 megabit per second. It features crosstalk, overvoltage protection, ground loss protection, and overheat shutdown functions to ensure greater circuit stability.

[0131] In one possible embodiment, the IO module includes an IO module main control circuit, an IO module watchdog circuit, an IO module communication circuit, an IO module power supply circuit, and an IO module interface circuit. The IO module power supply circuit converts 24V voltage to 3.3V voltage to power the IO module main control circuit, IO module watchdog circuit, IO module communication circuit, and IO module interface circuit. The IO module main control circuit uses an APM32A103RET7 to convert the acquired analog signals from the fine water mist system into digital signals. The IO module watchdog circuit monitors the status of the IO module main control circuit. The IO module communication circuit receives and sends data, and the IO module interface circuit is connected to the fine water mist system. The IO module also has 8 relay inputs isolated by G3VM-61VY3 solid-state relays.

[0132] Specifically, the I / O module mainly connects to various devices in the fine water mist system, including zone valves, pressure sensors, level sensors, PT100 sensors, and heating rods. After converting the acquired signals from analog to digital, the module transmits them to the main core board via the backplane for data analysis. See also... Figure 7 The IO module includes the IO module main control circuit, IO watchdog circuit, IO module communication circuit, IO module power supply circuit and IO module interface circuit.

[0133] The I / O module's main control circuit uses an APM32A103RET7 as the main control chip, with a main frequency of 168MHz, and an 8MHz active crystal oscillator. The I / O module's watchdog circuit uses a MAX706, the I / O module's communication circuit uses a TD341SCAN transceiver, and the I / O module's power supply circuit uses an EC7AW18-72S05 and an AMS1086-3.3, performing two voltage reduction steps: first, the EC7AW18-72S05 uses an isolated power supply to reduce the voltage from 24V to 5V, and then the AMS1086-3.3 uses the 5V to 3.3V. The 3.3V power supply provides power to the I / O module's main control circuit, watchdog circuit, communication circuit, and interface circuit. The I / O module's power supply circuit powers all parts of the circuit, and the I / O module's communication circuit receives analog signals, converting them into digital signals via the I / O module's main control circuit. A watchdog circuit monitors the main control circuit of the I / O module to prevent it from malfunctioning or crashing. In the event of a crash, it immediately restarts the system. The I / O module's communication circuit interface uses G3VM-61VY3(TR) solid-state relays for electrical isolation. The overall design features 8 relay inputs to better ensure signal stability.

[0134] In one possible embodiment, the MVB module includes an external MVB gateway and an MVB module control board; the external MVB gateway is used to convert TTL signals to MVB signals; the MVB module control board includes an MVB module power supply circuit, an MVB module MCU circuit, an MVB module watchdog circuit, an MVB module system power supply switch circuit, an MVB module reset circuit, an MVB module communication circuit, and an MVB module isolation circuit; the MVB module power supply circuit adopts a two-stage voltage reduction method, first using a URB2405YMD to step down DC24V to DC5V, and then using an AMS1117-3.3 to step down to 3.3V; the MVB module power supply circuit supplies power to the MVB module MCU circuit, the MVB module communication circuit, the MVB module isolation circuit, and the MVB module watchdog circuit; the MVB module isolation... The circuit uses a high-speed coupler 6N137; the MVB module communication circuit uses a TD341 CAN transceiver; the MVB module reset circuit includes a coupler and a tactile switch; the MVB module system power supply switch circuit includes a normally open relay and an AO3400 MOSFET; the MVB module watchdog circuit is powered by 3.3V and is connected to the MVB module MCU circuit, performing a reset operation after detecting an MCU crash; the MVB module MCU circuit is responsible for processing information data, receiving data information transmitted from the main core board module, and connecting to the external MVB gateway; when the main core board module is powered off or crashes, the backup core board module briefly takes over the operation of the main core board module, transmitting the processed data to the MVB module communication circuit, and then uploading it to the vehicle monitoring system through the MVB module communication circuit.

[0135] Specifically, the MVB module primarily collects processed information from various sub-devices and uploads it to the vehicle monitoring platform. See also... Figure 8 The MVB module consists of two parts: an externally sourced MVB gateway, which is a TTL-to-MVB converter, and an MVB module control board. The MVB module control board and the externally sourced MVB gateway are structurally connected using press-fit studs.

[0136] The MVB module control board is designed with MVB module power supply circuit, MVB module MCU circuit, MVB module watchdog circuit, MVB module system power supply switch circuit, MVB module reset circuit, MVB module communication circuit and MVB module isolation circuit.

[0137] The MVB module power supply circuit employs a two-step voltage reduction method. First, it uses a URB2405YMD to step down the DC24V to DC5V, and then uses an AMS1117-3.3 to step down it to 3.3V. After these two voltage reductions, a 3.3V output voltage is obtained. This voltage powers the MVB module's MCU circuit, communication circuit, isolation circuit, and watchdog circuit. The initial 5V voltage from the first step-down powers the MVB module's reset circuit and system power switch circuit.

[0138] The MVB module isolation circuit uses the high-speed coupler 6N137, which boasts advantages such as high transmission speed, low power consumption, and industrial-grade wide operating temperature range. Importantly, it is suitable for TTL-compatible circuits, transmitting isolated signals to the MVB module communication circuit. The MVB module communication circuit utilizes the TD341CAN transceiver, making it more suitable for high-magnetic environments. Since the MVB module transmits data to the vehicle monitoring platform, its 1Mbps communication rate is well-suited for this design, enabling faster and more efficient data transmission. Furthermore, it features overheat protection by shutting down when temperatures are too high. After receiving data, the MVB module communication circuit hands it over to the MVB module MCU circuit for processing and analysis. The MVB module communication circuit effectively isolates noise and interference. The MVB module reset circuit is primarily designed with a coupler and a tactile switch. The coupler ensures safe isolation while guaranteeing a fast response time; pressing the reset button resets the MVB module. The MVB module system power supply switch circuit is designed using a normally open relay and an AO3400 MOSFET, powered by 5V. OUT1 receives data from the main core board module and also has a monitoring voltage from the main core board module. With the monitoring voltage present, data transmission and reception are normal. When the main core board module's monitoring voltage is lost, there is no feedback. The MVB module's MCU circuit on the control board identifies this and sends a K1 signal. This signal causes the MOSFET to conduct, releasing current and attracting the normally open relay contacts, thus reconnecting the circuit and restoring operation. This design allows for system re-powering in the event of a power outage or system crash in the main core board module. The MVB module watchdog circuit is powered by 3.3V and connected to the MVB module's MCU circuit. Upon detecting a MCU crash, it can quickly perform a reset operation. The MVB module's MCU circuit is responsible for processing information data, receiving data from the main core board module, connecting to the external MVB gateway, and controlling its power-on functions. When the main core board module loses power or crashes, the backup core board module briefly takes over its operation, transmitting the processed data to the MVB module, which then uploads it to the vehicle monitoring system, ensuring uninterrupted system operation. The MVB module can be reset; this function can be performed by the control circuit issuing a time synchronization command or by the vehicle monitoring platform operator. The MVB module's MCU circuit processes all information received and uploaded to the vehicle system. (Switch module)

[0139] In one possible embodiment, the switch module includes a switch switching circuit, a switch interface circuit, and a switch voltage drop circuit; the switch voltage drop circuit converts 24V voltage to 3.3V voltage to power the switch switching circuit and the switch interface circuit; the switch switching circuit uses the RTL8305NBI-CG 100M switch chip; and the switch interface circuit reserves 6 interfaces isolated by a transformer.

[0140] Specifically, the function of the switch module is to reserve Ethernet ports, facilitating the connection of other devices according to actual needs, and for debugging during on-site connection. The switch module consists of a switching circuit, a switch module interface circuit, and a switch module voltage drop circuit. The switch module voltage drop circuit also employs a two-stage voltage reduction design: first converting 24V to 5V, then from 5V to 3.3V. This 3.3V voltage powers the switching circuit and the switch module interface circuit.

[0141] The switching circuit is designed using the RTL8305NBI-CG chip, a 100Mbps switch chip with high-speed data switching capabilities, ensuring stable and rapid transmission. It also features large data packet transmission capabilities, with a maximum data packet size of 2048 bytes. The interface circuit is designed with six ports, with reserved interfaces for easy connection to other devices in the system. The interface circuit is primarily designed based on a transformer to isolate signals and ensure network communication security. After receiving information, the interface circuit of the switch module isolates the data before passing it to the switching circuit. After data conversion, it is transmitted to the main core board module for data processing.

[0142] In one possible embodiment, the main core board of the fire alarm control equipment uses C++ programming language for each program module, and the program operation is monitored by an external independent hardware watchdog to ensure stable and reliable operation. Based on the function of each program module, the software system of the fire alarm control equipment is divided into the following levels:

[0143] Core layer:

[0144] The core layer tasks are described as follows: The core layer is responsible for receiving and transmitting CAN data from devices. It has four threads: the main thread, the receive data thread, the transmit data thread, and the network thread. The core layer receives and transmits data packets composed of digital signals. Upon receiving data, it reads the device configuration file, maps the device addresses and types in the configuration file to the actual devices, maps the devices to their ID numbers, initializes the status information of each device, and processes the information in the data packets according to the logical operations in the configuration file. This includes checking the integrity and validity of the input data, cleaning, formatting, and standardizing the input data, performing logical processing on the signals, and storing the data in the database. After these steps are completed, the main transmission line continuously transmits the processed data packets. The main line continuously reads data from the receive data thread, encapsulates it into network packets, and forwards them externally through the network thread. When receiving data, it parses, processes, and performs operations on the received socket data packets, and then sends the parsed CAN frames to the corresponding devices.

[0145] Application layer:

[0146] The application layer mainly includes the main thread, data receiving thread, data sending thread, and network thread. Its main functions are to read the logic statement configuration file, parse the device status and actions in the configuration file, obtain the actual device data through the interface with the underlying layer, compare the actual device data with the device information in the configuration file, and communicate with the underlying layer to inform the device to perform actions.

[0147] During operation, the system first reads the configuration file to initialize the data. Then, the main thread performs its work, matching the interface information, receiving the transmitted data packets, comparing the obtained information and interface information with the configuration file, and if a match is found, it interacts with the underlying layer through the network thread to obtain and send data.

[0148] Logs: The logs function first reads the configuration file to map the information transmitted from the application layer to the device. Then, after initializing the database, it begins reading data sent from the application layer, receiving network data and inserting it into the database.

[0149] The overall workflow of fire alarm control equipment is as follows:

[0150] First, the communication status and external device information are initialized. Then, the status information of the main core board module is checked. If the main core board module status information is normal, various operating information, such as fire alarms, faults, and status, is recorded. At this time, CAN bus data is received and monitored, and various data are processed. The data information is then recorded. During normal operation, each module initializes after startup. Then, the watchdog circuit checks whether the status of the microcontroller corresponding to each module is normal. If the status information is determined to be abnormal, the device is restarted. If the status is normal, the query operation is repeated. During normal data transmission and reception, i.e., when the controller is working normally, the status of the main core board module is monitored. If the status information of the main core board module is abnormal, the backup core board module needs to be started to work, recording various information of external devices, such as fault information and alarm information. The loop is then entered again to query whether the status of the main core board is normal, and this operation is repeated.

[0151] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A fire alarm control method, characterized in that, Includes the following steps: Data Acquisition: Smoke concentration and temperature data related to the fire are collected through smoke detectors and heat detectors. Data on the status of the area valves, water pressure, liquid level, water temperature, and heating rod status of the fine water mist system are collected through the IO module. Data processing: The main core board module processes the collected data, including checking data integrity and legality, cleaning, formatting, standardizing, and logical processing, and stores the processed data in the database; Temperature warning adjustment: Identify temperature information in the carriage over a specified period of time, generate a temperature matrix, adjust the fire warning temperature value and alarm temperature value according to the temperature change trend, and automatically issue a warning when the collected temperature information exceeds the warning value, and generate fire alarm information to upload to the backend monitoring platform; Water tank temperature prediction: Based on the temperature data of the water tank of the fine water mist system collected in the past specified time period, a temperature model is established using the ARIMA model in the spatiotemporal sequence prediction method to predict the water tank temperature information in the future set time period. When it is predicted that the temperature inside the water tank reaches the set heating value, the feedback is sent to the backend monitoring platform, and the heating mode of the water tank is turned on or off according to the authorization. The temperature warning is being adjusted: The temperature matrix is ​​a sequence of temperature values ​​from the past 7 days. ; By analyzing the current temperature Temperature compared to the previous moment Difference trend adjustment warning value: If the number of consecutive days is set The temperature has been determined to be rising, and the warning temperature value has been adjusted to [value missing]. : ； If the number of consecutive days is set The temperature has been determined to be dropping, and the warning temperature value has been adjusted to [value missing]. : ； In the formula, N is greater than 7, and A is the temperature warning value under normal temperature conditions; In the water tank temperature prediction, the ARIMA model is based on the water tank temperature matrix of the past 7 days. Establish and predict temperature values The calculation formula is: ； ； ； In the formula, These are the weights of the temperature matrix; This is the average value within the temperature matrix; The bias error is calculated using the following formula: ； ； In the formula, For the first Deviation error of the day, The deviation function is the average of the past seven days collected at a set time N.

2. A fire alarm control device, employing the fire alarm control method described in claim 1, characterized in that, It includes a power module, a dual power supply current sharing / 24V power supply module, a main core board module, a backup core board module, an IO module, a CAN communication module, a switch module, an MVB module, and a back connection board; The power supply module and the dual power supply current sharing / 24V power supply module are electrically connected. The dual power supply current sharing / 24V power supply module, the IO module, the CAN communication module, and the MVB module are all electrically connected to the main core board module. The dual power supply current sharing / 24V power supply module, the IO module, the CAN communication module, and the MVB module are all electrically connected to the backup core board module. The switch module and the main core board module are electrically connected. When the main core board module is working normally, the backup core board module is not working. When the main core board module fails or crashes, the backup core board module takes over the work. After the main core board module recovers, the backup core board module returns the work control to the main core board module.

3. The fire alarm control device according to claim 2, characterized in that, The CAN communication module uses a first CAN bus to connect to an external smoke detector and a temperature detector. The IO module is connected to a fine water mist system via a second CAN bus. The fine water mist system includes a zone valve, a pressure sensor, a liquid level sensor, a temperature sensor, and a heating rod. The power module receives a 110V DC voltage from the vehicle and outputs a 24V DC voltage. The dual power supply current sharing / 24V power supply module receives the voltage output from the two power supply modules, selects the larger voltage and adjusts it to 24V output to supply power to the main core board module, the backup core board module, the IO module, the CAN communication module, the switch module, and the MVB module. The maximum single-channel output current of the power module is kept below 4A, and the maximum main current is 8A. The power module is also equipped with a 24VDC power connector as a reserved interface for external 24VDC power supply equipment.

4. The fire alarm control device according to claim 3, characterized in that, The main core board module includes a main core board module step-down circuit, a main core board module communication circuit, a main core board module memory circuit, a main core board module watchdog circuit, a main core board module EMMC circuit, a main core board module processor circuit, and a main core board module Ethernet circuit. The main core board module's step-down circuit converts 24V to 3.3V to power the main core board module's communication circuit, memory circuit, watchdog circuit, EMMC circuit, processor circuit, and Ethernet circuit. The main core board processor circuit uses a quad-core ARM Cortex-A55 RK3568J processor to process data and perform algorithm calculations; The memory circuit of the main core board module uses a K4A8G165WCBITD chip to temporarily store data. The main core board module EMMC circuit uses the KLMCG4JEUD-B04P chip to store system data. The watchdog circuit of the main core board module monitors the status of the processor circuit of the main core board. The main core board module communication circuit is connected to the main core board processor circuit to send and receive data. The main core board's Ethernet circuit has a reserved interface that supports on-site debugging using a laptop.

5. The fire alarm control device according to claim 3, characterized in that, The backup core board module includes a backup core board module microcontroller circuit, a backup core board module communication circuit, a backup core board module power supply circuit, a backup core board module IC2 storage circuit, a backup core board module reset circuit, and a backup core board module watchdog circuit. The backup core board module power supply circuit converts 24V voltage to 3.3V voltage to power the backup core board module microcontroller circuit, the backup core board module communication circuit, the backup core board module IC2 storage circuit, the backup core board module reset circuit, and the backup core board module watchdog circuit. The microcontroller circuit of the backup core board module uses APM32A407VGT7 as the main controller. The communication circuit of the backup core board module uses a TD341SCAN isolated CAN transceiver to handle data transmission and reception. The backup core board module IC2 storage circuit is a storage chip that does not lose data when power is off. The backup core board module reset circuit monitors the voltage of the microcontroller circuit of the backup core board module. The watchdog circuit of the backup core board module uses a MAX706 chip to monitor the status of the microcontroller circuit of the backup core board module.

6. The fire alarm control device according to claim 3, characterized in that, The IO module includes an IO module main control circuit, an IO module watchdog circuit, an IO module communication circuit, an IO module power supply circuit, and an IO module interface circuit; The IO module power supply circuit converts 24V voltage to 3.3V voltage to power the IO module main control circuit, the IO module watchdog circuit, the IO module communication circuit, and the IO module interface circuit. The main control circuit of the IO module uses APM32A103RET7 to convert the collected analog signals of the fine water mist system into digital signals; The watchdog circuit of the IO module monitors the status of the main control circuit of the IO module; the communication circuit of the IO module receives and sends data; and the interface circuit of the IO module is connected to the fine water mist system. The IO module also has 8 relay inputs isolated by G3VM-61VY3 solid-state relays.

7. The fire alarm control device according to claim 3, characterized in that, The MVB module includes an externally sourced MVB gateway and an MVB module control board; The external MVB gateway is used to convert TTL signals to MVB signals; The MVB module control board includes an MVB module power supply circuit, an MVB module MCU circuit, an MVB module watchdog circuit, an MVB module system power supply switch circuit, an MVB module reset circuit, an MVB module communication circuit, and an MVB module isolation circuit. The power supply circuit of the MVB module adopts a two-step step-down method. First, it uses URB2405YMD to step down DC24V to DC5V, and then uses AMS1117-3.3 to step down to 3.3V. The power supply circuit of the MVB module supplies power to the MCU circuit, communication circuit, isolation circuit, and watchdog circuit of the MVB module. The MVB module isolation circuit uses a high-speed coupler 6N137; the MVB module communication circuit uses a TD341 CAN transceiver; the MVB module reset circuit includes a coupler and a tactile switch. The power supply switching circuit of the MVB module system includes a normally open relay and an AO3400 MOSFET. The watchdog circuit of the MVB module is powered by 3.3V and is connected to the MCU circuit of the MVB module. It performs a reset operation after detecting that the MCU has crashed. The MVB module MCU circuit is responsible for processing information data, receiving data information transmitted by the main core board module, and connecting with the external MVB gateway; When the main core board module loses power or crashes, the backup core board module briefly takes over the operation of the main core board module, transmits the processed data to the MVB module communication circuit, and uploads it to the vehicle monitoring system through the MVB module communication circuit.

8. The fire alarm control device according to claim 3, characterized in that, The switch module includes a switch switching circuit, a switch interface circuit, and a switch voltage drop circuit. The switch voltage drop circuit converts 24V to 3.3V to power the switch switching circuit and the switch interface circuit. The switch switching circuit uses the RTL8305NBI-CG 100Mbps switch chip, and the switch interface circuit reserves 6 interfaces isolated by a transformer.

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