Intelligent fire extinguishing control system

Abstract

The invention discloses an intelligent fire extinguishing control system which comprises a temperature sensing module, a judgment module, a fire extinguishing execution module, a communication and monitoring module and a power management module, the temperature sensing module adopts a high-precision thermistor as a temperature sensing element, and the resistance value of the temperature sensing element presents an accurate linear relation along with temperature change; a microprocessor arranged in the temperature sensing module samples the resistance value of a thermistor at a fixed frequency, the judgment module comprises a dynamic threshold setting algorithm and a fire judgment logic, and comprehensive intelligent prevention and control of a fire in a small closed space are achieved through cooperative work and advanced algorithm application of all the modules. The high efficiency, reliability and innovativeness of the system are embodied from temperature sensing detection to fire judgment, from fire extinguishing execution to remote monitoring and early warning and from intelligentization of power management. The system can effectively improve the fire prevention and control capability and reduce the loss caused by the fire.

Description

Technical Field

[0001] The present invention relates to the technical field of fire extinguishing control, and in particular to an intelligent fire extinguishing control system. Background Art

[0002] In modern society, fire prevention and control are of vital importance, especially in various small confined spaces, such as distribution boxes, machine rooms, gas tank storage rooms, computer rooms, etc., where timely detection and effective extinguishing of fires face many challenges. Traditional fire extinguishing equipment often has difficulty in quickly detecting the source of fire, and has deficiencies in fire extinguishing efficiency and intelligence. This intelligent fire extinguishing control system aims to overcome these problems by integrating advanced sensing technology, intelligent algorithms and efficient fire extinguishing execution mechanisms to achieve accurate detection, rapid response and effective extinguishing of fire sources, while ensuring the stability and reliability of the system, providing strong support for protecting the safety of life and property. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and provide an intelligent fire extinguishing control system. Through the collaborative work between modules and the application of advanced algorithms, the comprehensive intelligent prevention and control of fires in small confined spaces is realized. From temperature detection to fire judgment, from fire extinguishing execution to remote monitoring and early warning, and the intelligentization of power management, the system's efficiency, reliability and innovation are reflected. The system can effectively improve the fire prevention and control capabilities and reduce the losses caused by fire.

[0004] The present invention also provides the above-mentioned intelligent fire extinguishing control system, including: a temperature sensing module, a judgment module, a fire extinguishing execution module, a communication and monitoring module, and a power management module. The temperature sensing module uses a high-precision thermistor as a temperature sensing element, and its resistance value shows an accurate linear relationship with temperature changes. The microprocessor built into the temperature sensing module samples the resistance value of the thermistor at a fixed frequency. The judgment module includes a dynamic threshold setting algorithm and a fire judgment logic;

[0005] The dynamic threshold setting algorithm dynamically sets the fire warning threshold according to the historical data and real-time change trend of the ambient temperature through the system. The fire judgment logic determines that a fire has occurred by analyzing the temperature rise rate and the predetermined rapid temperature rise threshold, triggering the fire extinguishing instruction, and making a comprehensive judgment in combination with the data of the smoke sensor.

[0006] The fire extinguishing execution module is equipped with dry powder, carbon dioxide, and water-based fire extinguishing agents, and automatically selects appropriate fire extinguishing agents according to different fire types. After receiving the fire extinguishing command, the fire extinguishing execution module calculates the optimal fire extinguishing agent injection parameters according to the location and scale of the fire. The communication and monitoring module includes data transmission protocol and encryption, remote monitoring and intelligent early warning algorithms. The power management module uses AC power as the main power supply, and is equipped with an uninterruptible power supply UPS as a backup power supply.

[0007] According to the intelligent fire extinguishing control system provided by the present invention, the raw resistance value data collected by the temperature sensing module is first filtered to remove possible noise signals such as electromagnetic interference, and the resistance value is converted into a corresponding temperature value using a pre-calibrated resistor combined with a temperature conversion algorithm. The formula is as follows:

[0008] T=aR 3 +bR 2 +cR+d

[0009] Where is the temperature, R is the resistance value, and α, b, c, and d are calibration coefficients.

[0010] According to the intelligent fire extinguishing control system provided by the present invention, the dynamic threshold setting algorithm is as follows:

[0011] First, statistical analysis is performed on the temperature data over a period of time to calculate the average temperature. and the temperature standard deviation σ T , initial fire warning threshold T th1 Set to Where k1 is a coefficient determined according to the environmental risk level. In a high-risk environment, k1=3; in a medium-risk environment, k1=2; in a low-risk environment, k1=1.5. As time goes by, the system continuously updates the temperature data and adjusts the threshold in real time according to the new data. If the temperature continues to rise in multiple consecutive sampling periods and the rising rate exceeds a certain value, the ratio of the temperature difference to the time interval is calculated, and the threshold is adjusted to: Where k2>k1 to improve the response sensitivity to rapid temperature rise.

[0012] According to the intelligent fire extinguishing control system provided by the present invention, the fire extinguishing execution module obtains the ambient air flow information through the wind speed sensor and temperature sensor installed near the fire extinguishing nozzle, and calculates the injection angle θ and the injection flow rate Q using the following formula;

[0013] Spray Angle where v y and v x are the wind speed components perpendicular and parallel to the direction of the sprinkler respectively, and α is the correction angle determined according to the sprinkler structure and fire extinguishing range;

[0014] Injection flow Where k3 is a coefficient related to the characteristics of the fire extinguishing agent and the nozzle size, A is the nozzle cross-sectional area, and ΔP is the difference between the pressure inside the container and the ambient pressure.

[0015] According to the intelligent fire extinguishing control system provided by the present invention, the data transmission protocol and encryption adopt WIFI, ZIGBEE and LORAWAN based on the wireless communication technology of the Internet of Things to transmit the system's operating status data, including temperature, smoke concentration, fire extinguishing agent pressure, and fire extinguishing execution status in real time to the remote monitoring center. During the data transmission process, the data is encrypted using the secure and reliable data transmission protocol SSL / TLS to prevent the data from being stolen or tampered with.

[0016] According to the intelligent fire extinguishing control system provided by the present invention, the remote monitoring and intelligent early warning algorithm, after receiving data through the server of the remote monitoring center, parses and stores the data, runs the intelligent early warning algorithm to perform real-time analysis on the data, and predicts the spread direction and speed of the fire by performing spatial interpolation and trend analysis on the temperature and smoke concentration data of multiple monitoring points. When it is predicted that the fire may spread to adjacent areas, the system sends early warning information to the relevant areas in advance, notifies personnel to evacuate and activates the fire extinguishing equipment in the corresponding area for prevention.

[0017] Compared with the prior art, the intelligent fire extinguishing control system of the present invention realizes comprehensive intelligent prevention and control of fires in small confined spaces through the collaborative work between modules and the application of advanced algorithms. From temperature detection to fire judgment, from fire extinguishing execution to remote monitoring and early warning, as well as intelligent power management, the system's efficiency, reliability and innovation are reflected. The system can effectively improve fire prevention and control capabilities and reduce losses caused by fires. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0019] Figure 1 It is the overall architecture diagram of the intelligent fire extinguishing control system of the present invention. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0021] Reference Figure 1The intelligent fire extinguishing control system of the embodiment of the present invention includes: a temperature sensing module, a judgment module, a fire extinguishing execution module, a communication and monitoring module, and a power management module. The temperature sensing module uses a high-precision thermistor as a temperature sensing element, and its resistance value shows an accurate linear relationship with temperature changes. The microprocessor built into the temperature sensing module samples the resistance value of the thermistor at a fixed frequency. The judgment module includes a dynamic threshold setting algorithm and a fire judgment logic. The original resistance value data collected by the temperature sensing module is first filtered to remove possible noise signals such as electromagnetic interference, and the resistance value is converted into a corresponding temperature value using a pre-calibrated resistor combined with a temperature conversion algorithm. The formula is as follows:

[0022] T=aR 3 +bR 2 +cR+d

[0023] Where T is temperature, R is resistance, and a, b, c, and d are calibration coefficients.

[0024] The dynamic threshold setting algorithm is as follows:

[0025] First, statistical analysis is performed on the temperature data over a period of time to calculate the average temperature. and the temperature standard deviation σ T , initial fire warning threshold T th1 Set to Where k1 is a coefficient determined according to the environmental risk level. In a high-risk environment, k1=3; in a medium-risk environment, k1=2; in a low-risk environment, k1=1.5. As time goes by, the system continuously updates the temperature data and adjusts the threshold in real time according to the new data. If the temperature continues to rise in multiple consecutive sampling periods and the rising rate exceeds a certain value, the ratio of the temperature difference to the time interval is calculated, and the threshold is adjusted to: Where k2>k1 to improve the response sensitivity to rapid temperature rise.

[0026] The dynamic threshold setting algorithm dynamically sets the fire warning threshold based on the historical data and real-time change trend of the ambient temperature. The fire judgment logic determines that a fire has occurred by analyzing the temperature rise rate and the predetermined rapid temperature rise threshold, triggering the fire extinguishing command, and making a comprehensive judgment based on the data of the smoke sensor.

[0027] The fire extinguishing execution module is equipped with dry powder, carbon dioxide, and water-based fire extinguishing agents, and automatically selects the appropriate fire extinguishing agent according to different fire types. After receiving the fire extinguishing command, the fire extinguishing execution module calculates the optimal fire extinguishing agent injection parameters according to the location and scale of the fire. The fire extinguishing execution module obtains the ambient air flow information through the wind speed sensor and temperature sensor installed near the fire extinguishing nozzle, and calculates the injection angle θ and injection flow Q using the following formula;

[0028] Spray Angle where v y and v x are the wind speed components perpendicular and parallel to the direction of the sprinkler respectively, and α is the correction angle determined according to the sprinkler structure and fire extinguishing range;

[0029] Injection flow Where k3 is a coefficient related to the characteristics of the fire extinguishing agent and the nozzle size, A is the nozzle cross-sectional area, and ΔP is the difference between the pressure inside the container and the ambient pressure.

[0030] The communication and monitoring module includes data transmission protocols and encryption. It uses WIFI, ZIGBEE and LORAWAN based on the wireless communication technology of the Internet of Things to transmit the system's operating status data, including temperature, smoke concentration, fire extinguishing agent pressure, and fire extinguishing execution status, to the remote monitoring center in real time. During the data transmission process, the secure and reliable data transmission protocol SSL / TLS is used to encrypt the data to prevent the data from being stolen or tampered with.

[0031] Remote monitoring and intelligent early warning algorithm, remote monitoring and intelligent early warning algorithm, after receiving data through the server of the remote monitoring center, the data is parsed and stored, and the intelligent early warning algorithm is run to analyze the data in real time. By performing spatial interpolation and trend analysis on the temperature and smoke concentration data of multiple monitoring points, the spread direction and speed of the fire are predicted. When it is predicted that the fire may spread to adjacent areas, the system will send early warning information to the relevant areas in advance, notify personnel to evacuate and activate the fire-fighting equipment in the corresponding area for prevention.

[0032] The power management module uses the mains power supply as the main power supply, and is equipped with an uninterruptible power supply UPS as the backup power supply. The power management module immediately and seamlessly switches to the backup power supply to ensure that the system can still operate normally during the mains power outage. The switching time is controlled in milliseconds to ensure the continuity of the system operation. The power management module immediately and seamlessly switches to the backup power supply to ensure that the system can still operate normally during the mains power outage. The switching time is controlled in milliseconds to ensure the continuity of the system operation.

[0033] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. Intelligent fire extinguishing control system, including: A temperature sensing module, a judgment module, a fire extinguishing execution module, a communication and monitoring module, and a power management module, wherein the temperature sensing module uses a high-precision thermistor as a temperature sensing element, and its resistance value shows an accurate linear relationship with temperature changes. The microprocessor built into the temperature sensing module samples the resistance value of the thermistor at a fixed frequency, and the judgment module includes a dynamic threshold setting algorithm and a fire judgment logic; The dynamic threshold setting algorithm dynamically sets the fire warning threshold according to the historical data and real-time change trend of the ambient temperature through the system. The fire judgment logic determines that a fire has occurred by analyzing the rate of temperature rise and the predetermined rapid temperature rise threshold, triggering a fire extinguishing instruction, and making a comprehensive judgment in combination with the data of the smoke sensor; The fire extinguishing execution module is equipped with dry powder, carbon dioxide, and water-based fire extinguishing agents, and automatically selects appropriate fire extinguishing agents according to different fire types. After receiving the fire extinguishing command, the fire extinguishing execution module calculates the optimal fire extinguishing agent injection parameters according to the location and scale of the fire. The communication and monitoring module includes data transmission protocol and encryption, remote monitoring and intelligent early warning algorithms. The power management module uses AC power as the main power supply and is equipped with an uninterruptible power supply (UPS) as a backup power supply.

2. The intelligent fire extinguishing control system according to claim 1, characterized in that: The raw resistance value data collected by the temperature sensing module is first filtered to remove possible noise signals such as electromagnetic interference, and the resistance value is converted into the corresponding temperature value using a pre-calibrated resistor combined with a temperature conversion algorithm. The formula is as follows: T=aR 3 +bR 2 +cR+d Where T is temperature, R is resistance, and a, b, c, and d are calibration coefficients.

3. The intelligent fire extinguishing control system according to claim 1, characterized in that: The dynamic threshold setting algorithm is as follows: First, statistical analysis is performed on the temperature data over a period of time to calculate the average temperature. and the temperature standard deviation σ T , initial fire warning threshold T th1 Set to Where k1 is a coefficient determined according to the environmental risk level. In a high-risk environment, k1=3; in a medium-risk environment, k1=2; in a low-risk environment, k1=1.

5. As time goes by, the system continuously updates the temperature data and adjusts the threshold in real time according to the new data. If the temperature continues to rise in multiple consecutive sampling periods and the rising rate exceeds a certain value, the ratio of the temperature difference to the time interval is calculated, and the threshold is adjusted to: Where k2>k1 to improve the response sensitivity to rapid temperature rise.

4. The intelligent fire extinguishing control system according to claim 1, characterized in that: The fire extinguishing execution module obtains ambient air flow information through a wind speed sensor and a temperature sensor installed near the fire extinguishing nozzle, and calculates the injection angle θ and the injection flow rate Q using the following formula; Spray Angle where v y and v x are the wind speed components perpendicular and parallel to the direction of the sprinkler respectively, and α is the correction angle determined according to the sprinkler structure and fire extinguishing range; Injection flow Where k3 is a coefficient related to the characteristics of the fire extinguishing agent and the nozzle size, A is the nozzle cross-sectional area, and ΔP is the difference between the pressure inside the container and the ambient pressure.

5. The intelligent fire extinguishing control system according to claim 1, characterized in that: The data transmission protocol and encryption adopt WIFI, ZIGBEE and LORAWAN based on the wireless communication technology of Internet of Things to transmit the system operation status data, including temperature, smoke concentration, fire extinguishing agent pressure, and fire extinguishing execution status, to the remote monitoring center in real time. During the data transmission process, the secure and reliable data transmission protocol SSL / TLS is used to encrypt the data to prevent the data from being stolen or tampered with.

6. The intelligent fire extinguishing control system according to claim 1, characterized in that: The remote monitoring and intelligent early warning algorithm receives data through the server of the remote monitoring center, parses and stores the data, runs the intelligent early warning algorithm to analyze the data in real time, and predicts the spread direction and speed of the fire by performing spatial interpolation and trend analysis on the temperature and smoke concentration data of multiple monitoring points. When it is predicted that the fire may spread to adjacent areas, the system sends early warning information to the relevant areas, notifies personnel to evacuate and activates the fire-fighting equipment in the corresponding areas for prevention.

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