Intelligent fire extinguishing system suitable for electric bicycle concentrated parking place

Abstract

The invention discloses an intelligent fire extinguishing system suitable for an electric bicycle concentrated parking place, particularly relates to the technical field of intelligent fire extinguishing, and comprises an intelligent eye sensing module, a fire extinguishing processing end, a linkage control device, a sensing recognition device and an environment monitoring module. According to the intelligent fire extinguishing system suitable for the electric bicycle concentrated parking place, a designed double-spectrum camera is fused with a visible light image recognition algorithm and an infrared light image recognition algorithm, a fire source and a background heat source can be effectively distinguished, the false alarm rate is reduced, the UWB positioning module and the moving platform driven by the servo motor are matched, and the fire extinguishing effect is improved. Centimeter-level positioning of a fire source position is realized, and the fire extinguishing accuracy is improved; a foam spraying and water system fire extinguishing module grading starting mechanism is adopted at the fire extinguishing treatment end, dynamic path planning of an intelligent eye sensing module is combined, a three-dimensional fire extinguishing network is formed, a certain area can be covered in a short time, the temperature can be reduced, the fire extinguishing efficiency is improved, and water resource waste is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent fire extinguishing, and in particular to an intelligent fire extinguishing system suitable for centralized parking places for electric bicycles. Background Art

[0002] With the popularity of electric bicycles, fire safety issues in centralized parking areas have become increasingly prominent. Electric bicycle batteries are prone to thermal runaway when charging or malfunctioning, causing fires. Fires spread rapidly in centralized parking environments, often accompanied by the release of flammable gases such as carbon monoxide and hydrogen.

[0003] In the existing technology, the fire extinguishing system for electric bicycle centralized parking places has the following deficiencies: First, the fire source detection method is single, mostly relying on a single smoke or temperature sensor, which is easily affected by environmental interference and leads to false alarms, and cannot quickly and accurately locate the fire source, affecting the efficiency of fire extinguishing response; second, the fire extinguishing method lacks a hierarchical strategy, usually using a single sprinkler system, which is difficult to dynamically adjust the disposal plan according to the size of the fire, which may result in incomplete fire extinguishing or waste of resources; third, the system linkage is insufficient, and when a fire occurs, it is impossible to simultaneously realize power cut-off, sound and light alarm and environmental gas monitoring, making it difficult to form an integrated emergency response mechanism. Therefore, there is a need for an intelligent fire extinguishing system suitable for electric bicycle centralized parking places. Summary of the Invention

[0004] The main purpose of the present invention is to provide an intelligent fire extinguishing system suitable for centralized parking places for electric bicycles, which can effectively solve the problems raised above.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] An intelligent fire extinguishing system suitable for centralized parking of electric bicycles, comprising: a smart eye perception module, a fire extinguishing disposal terminal, a linkage control device, a perception and recognition device, and an environmental monitoring module; The smart eye perception module is installed on the canopy support frame of the venue, equipped with a dual-spectrum camera, a mobile platform and a mobile track, and a UWB positioning module at the bottom for fire source detection, precise positioning and dynamic fire extinguishing path planning; The fire extinguishing disposal end includes a foam spray device and a water fire extinguishing module, with a temperature sensor monitoring probe installed on the top, which is electrically connected to the smart eye perception module to form a three-dimensional fire extinguishing network; The linkage control device is installed on a column in the venue (2-3 meters from the ground) and is protected by a waterproof shell. It includes a power cut-off module and an audible and visual alarm. It is connected to the smart eye perception module via an optical cable and is used to cut off the power supply and issue an alarm signal when a fire source is detected. The sensing and identification device is deployed at the bottom of the parking rack and includes an RFID identification antenna and an NFC reader / writer. The RFID identification antenna reads the electronic tag information of the electric bicycle and combines the NFC reader / writer to realize the binding of vehicle identity authentication and parking position. The environmental monitoring module integrates an electrochemical gas sensor, which is installed on the smart eye perception module and electrically connected to the linkage device for continuous monitoring of the environmental gas concentration in the venue.

[0007] Preferably, the mobile platform of the smart eye perception module is driven by a servo motor and moves horizontally or vertically along a moving track on the awning support frame, cooperating with the UWB positioning module to achieve centimeter-level positioning of the fire source.

[0008] Preferably, the foam spraying device at the fire extinguishing disposal end adopts a pressure-type foam proportioning mixer, and the water-based fire extinguishing module includes a fire water pump and a sprinkler pipe network, and the two are started in stages through a linkage control device.

[0009] Preferably, the linkage control device also includes a data processing unit for receiving the fire source location data from the smart eye perception module and the gas concentration data from the environmental monitoring module, and generating a fire extinguishing control instruction.

[0010] Preferably, the environmental monitoring module monitors at least the concentration parameters of carbon monoxide, hydrogen, and smoke particles, and transmits the data in real time to the linkage control device for early warning analysis.

[0011] Preferably, the dual-spectrum camera simultaneously collects visible light and infrared light images, and distinguishes fire sources from background heat sources through image recognition algorithms, thereby reducing the false alarm rate.

[0012] Preferably, the image recognition algorithm first extracts the color features of the visible light image, then performs thermal feature analysis on the infrared image, and finally generates the final fire source determination result by dual-spectrum feature fusion decision.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The dual-spectrum camera designed in this invention integrates visible light and infrared light image recognition algorithms to effectively distinguish between fire sources and background heat sources, reducing the false alarm rate. In conjunction with the UWB positioning module and the mobile platform driven by a servo motor, it can achieve centimeter-level positioning of the fire source and improve the accuracy of fire extinguishing.

[0015] 2. The fire extinguishing disposal end of the present invention adopts a hierarchical activation mechanism of foam spray and water fire extinguishing modules, combined with the dynamic path planning of the smart eye perception module to form a three-dimensional fire extinguishing network. This strategy can cover a 5m² area within 15 seconds and reduce the temperature from 800°C to below 200°C, which not only improves fire extinguishing efficiency but also avoids water waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the overall module interaction block diagram of the present invention; Figure 2 It is a flowchart of the overall workflow of the present invention. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] like Figure 1 As shown, an intelligent fire extinguishing system suitable for electric bicycle centralized parking places includes: a smart eye perception module, a fire extinguishing disposal terminal, a linkage control device, a perception and recognition device, and an environmental monitoring module; Furthermore, the smart eye perception module is installed on the site canopy support frame, equipped with a dual-spectrum camera, a mobile platform and a mobile track, and a UWB positioning module at the bottom for fire source detection, precise positioning and dynamic fire extinguishing path planning; The mobile platform of the smart eye perception module is driven by a servo motor and moves horizontally or vertically along the mobile track on the awning support frame, cooperating with the UWB positioning module to achieve centimeter-level positioning of the fire source; The dual-spectrum camera simultaneously collects visible light and infrared light images, and distinguishes fire sources from background heat sources through an image recognition algorithm to reduce the false alarm rate. Its image recognition algorithm first extracts the color features of the visible light image, then analyzes the thermal features of the infrared image, and finally generates the final fire source determination result through dual-spectrum feature fusion decision.

[0019] In the above, the smart eye perception module is installed at the top crossbeam of the awning support frame and fixed by an L-shaped bracket. The dual-spectral camera (model: FLIRA315) is facing the center of the parking area. The mobile platform (built with aluminum alloy profiles) is driven by a servo motor (model: Panasonic MINASA6) and moves in a two-dimensional plane along the horizontal (X-axis) and vertical (Y-axis) moving tracks. Limit switches are installed at both ends of the track to prevent crossing the boundary. In the above, the bottom UWB positioning module (model: DecawaveDW1000) receives signals from anchor points installed at the four corners of the parking rack to achieve centimeter-level positioning of the fire source (error ≤ 5cm); Next, the working principle of fire source detection and positioning of the Smart Eye perception module: The dual-spectral camera simultaneously captures visible light (400-700 nm) and infrared light (8-14 μm) images; S1. Visible light image: Identify suspected fire source areas through color feature extraction algorithm (HSV color space threshold segmentation, flame color threshold H∈[0,30], S∈[100,255], V∈[100,255]); S2. Infrared image: Use thermal feature analysis algorithm (temperature threshold ≥ 60°C, hot spot area ≥ 0.1m²) to screen high-temperature areas; S3. Dual-spectrum fusion: This system uses the DS evidence theory to fuse the features of both. When the matching degree between visible light and infrared features is ≥0.8, it is determined to be a fire source, reducing the false alarm rate of background heat sources such as sunlight and heaters (false alarm rate ≤0.1 times / month); S4. The servo motor of the mobile platform calculates the optimal path based on the UWB positioning data {fire source coordinates (X, Y)} and controls the motor speed (maximum linear speed 0.5 m / s) through the PLC (model: Siemens S7-200SMART), driving the camera to move within 3 meters directly above the fire source for dynamic tracking.

[0020] Through the operation steps S1-S4, the fire source detection and positioning can be completed, the location of the fire source can be accurately detected, and the fire source can be accurately extinguished to improve the efficiency of fire extinguishing.

[0021] Furthermore, the fire extinguishing disposal end includes a foam spray device and a water-based fire extinguishing module, with a temperature sensor monitoring probe installed on the top, which is electrically connected to the smart eye sensing module to form a three-dimensional fire extinguishing network; The foam spraying device at the fire extinguishing disposal end adopts a pressure-type foam proportioning mixer, and the water-based fire extinguishing module includes a fire water pump and a sprinkler pipe network, which are both started in stages through a linkage control device.

[0022] In the above, the foam spray device (pressure foam proportioning mixer model: PHYM32 / 10) is installed on the top of the awning and connected to the water system fire extinguishing module through a DN50 galvanized steel pipe; The fire pump for the water-based fire extinguishing module (model: XBD5.0 / 30-DL, flow rate 30L / s, head 50m) is placed in the underground fire pump room. The sprinkler network uses DN80 hot-dip galvanized steel pipes, and pendent sprinklers (model: ZSTZ15) are arranged at intervals of 2m. The temperature sensor monitoring probe (model: PT100) is embedded in the shell of the foam spray device to collect the ambient temperature in real time (monitoring range -20℃~120℃, accuracy ±0.5℃); Next, the hierarchical activation mechanism of the fire extinguishing disposal end is: The linkage control device generates fire extinguishing instructions based on the fire source temperature (collected by the temperature sensor probe) and positioning data: S1, Level 1 response: When the temperature is ≤200℃, the foam spray device is activated, and the pressure foam proportioning mixer mixes the foam liquid (model: AFFF-AR) and water at a ratio of 3%, and forms a foam covering layer through the nozzle (spraying pressure 0.6MPa, covering area ≥5m²); S2, Level 2 response: When the temperature is >200°C or the fire source area is ≥2m², the water system fire extinguishing module is activated at the same time, the fire pump is pressurized to 0.8MPa, and the sprinkler network continuously sprays water (spraying intensity ≥8L / (min・m²)), forming a three-dimensional fire extinguishing network.

[0023] In this way, when the fire is small, the foam spray device is activated to extinguish the fire. When the fire is large, the water fire extinguishing module is activated at the same time for double fire extinguishing, ensuring that the fire will not spread and increase. While ensuring a certain working cost, it can also effectively extinguish the fire and prevent the fire from spreading.

[0024] Furthermore, the linkage control device is installed on a column in the venue (2-3 meters from the ground) and is protected by a waterproof shell. It includes a power cut-off module and an audible and visual alarm. It is connected to the smart eye perception module via an optical cable and is used to cut off the power supply and issue an alarm signal when a fire source is detected. The linkage control device also includes a data processing unit for receiving fire source location data from the smart eye perception module and gas concentration data from the environmental monitoring module, and generating fire extinguishing control instructions.

[0025] In the above, the waterproof housing integrates a power cut-off module (model: ABBS203-C16), an audible and visual alarm (model: HY2002) and a data processing unit (CPU: Intel i5-1135G7, memory 8GB); The power cut-off module is connected to the site distribution box through a circuit breaker, which can remotely cut off the charging power of the electric bicycle; The sound pressure level of the sound and light alarm is ≥85dB, and the flash frequency is 1 time / second.

[0026] Furthermore, the coordination of linkage control and environmental monitoring

[0027] S1. Data processing unit receives in real time: 1. Fire source location (X, Y, Z coordinates) and judgment results of the smart eye perception module; 2. Gas concentration data from the environmental monitoring module (alarms are triggered when the carbon monoxide threshold is ≥300ppm, the hydrogen threshold is ≥100ppm, and the smoke particle concentration threshold is ≥0.5mg / m³).

[0028] S2. When a fire source is detected, the following operations are executed simultaneously: 1. The power cut-off module cuts off the charging power supply in the corresponding area; 2. The sound and light alarm emits a sound and light alarm; 3. Adjust fire extinguishing strategies based on gas concentration data (e.g., when hydrogen concentration exceeds the standard, give priority to using foam fire extinguishing to prevent explosion).

[0029] This means that when a fire occurs, the power supply in the venue can be cut off urgently to prevent the fire from damaging the telephones and affecting circuit safety hazards.

[0030] Furthermore, the sensing and identification device is deployed at the bottom of the parking rack, and includes an RFID identification antenna and an NFC reader-writer integrated machine. The electronic tag information of the electric bicycle is read through the RFID identification antenna, and the vehicle identity authentication and parking position binding are realized in combination with the NFC reader-writer integrated machine.

[0031] In the above, an RFID identification antenna (model: Impinj Speedway R220, reading distance 0.5~2m) is embedded in the center of the bottom of each parking rack. The NFC reader / writer (model: ACR122U) is connected to the linkage control device via the RS485 bus to read the vehicle identity information of the electric bicycle electronic tag (RFID tag model: ISO11784 / 85, NFC tag model: ISO14443A) and bind the parking position coordinates through the UWB positioning module.

[0032] The process of binding vehicle identity and location is as follows: When an electric bicycle is parked, the RFID identification antenna reads the vehicle's electronic tag ID, the NFC reader / writer reads the owner's information (name, contact information, etc.), and the parking rack coordinates are obtained through the UWB positioning module (accuracy ±10cm), forming a binding record of "vehicle ID-owner information-parking location" and storing it in the database (SQLite) of the linkage control device, making it easy to quickly locate the vehicle involved in the event of a fire.

[0033] Furthermore, the environmental monitoring module integrates an electrochemical gas sensor, which is installed on the smart eye perception module and electrically connected to the linkage device to continuously monitor the concentration of environmental gases in the venue; The environmental monitoring module monitors at least the concentration parameters of carbon monoxide, hydrogen, and smoke particles, and transmits the data in real time to the linkage control device for early warning analysis; Among the above, the electrochemical gas sensors (carbon monoxide sensor model: MQ-7, range 0-1000ppm; hydrogen sensor model: MQ-8, range 0-1000ppm; smoke sensor model: MQ-2) are integrated into the side of the housing of the Smart Eye perception module and communicate with the linkage control device via the 485 bus. The data sampling frequency is 1 time per second. Its working principle is:

[0034] S1. Gas concentration detection mechanism 1. Electrochemical sensor: A weak current is generated through the redox reaction of gas on the electrode surface. The current is linearly related to the gas concentration (for example, CO undergoes an oxidation reaction at the working electrode: CO + H2O → CO2 + 2H⁺ + 2e⁻). After being amplified by an operational amplifier, it is converted into a voltage signal (0-5V). 2. Semiconductor sensor: Smoke particles are adsorbed on the surface of SnO2 semiconductor, causing the conductivity of the material to change. The resistance change (ΔR / R0) is detected by Wheatstone bridge and converted into particle concentration.

[0035] S2. Data processing and analysis process 1. The original signal is sampled by a 12-bit ADC (model ADC0832) and then enters the data processing unit of the linkage control device; 2. Use Kalman filtering algorithm to eliminate signal noise (such as environmental electromagnetic interference, sensor drift) and generate concentration-time curve in real time; 3. Build a gas release model based on historical data (e.g., H2 concentration increases exponentially in the early stages of battery thermal runaway) to predict fire risks 0.5 to 1 minute in advance.

[0036] Finally, the overall working process of this system is:

[0037] S1. Daily monitoring and data pre-storage (continuous operation) 1. Environmental parameter collection: The environmental monitoring module monitors CO, H2 concentrations and smoke particle values at a frequency of 1 time per second, and transmits the data to the linkage control device via the 485 bus. The data is de-noised by Kalman filtering and stored in the SQLite database to generate a historical concentration curve (storage period is 7 days); 2. Area Scanning and Vehicle Management: The Smart Eyes sensing module activates a dual-spectrum camera to scan the parking area every five minutes, buffering visible light and infrared images in memory. The sensing and recognition device uses RFID / NFC to update the vehicle's "ID-location" binding table in real time (with a positioning accuracy of ±10cm), forming a "vehicle status-environmental data" association database. 3. Early risk prediction: The linkage control device analyzes the H2 concentration trend (e.g., a 0.5 ppm / minute increase) and, combined with the battery thermal runaway model, issues a warning of potential failures 1-2 minutes in advance, increasing efficiency 10 times over traditional inspections.

[0038] S2. Fire source detection and location response (event triggering) 1. Dual-spectrum fusion judgment: When the dual-spectrum camera detects visible flame characteristics (HSV threshold: H∈[0,30], S∈[100,255], V∈[100,255]) and infrared hot spots (temperature ≥60°C, area ≥0.1m²), it is determined to be a fire source through DS evidence theory fusion (matching degree ≥0.8); 2. Dynamic positioning and warning: The UWB positioning module (error ≤ 5 cm) obtains the three-dimensional coordinates of the fire source, and the mobile platform drives the camera to approach the fire source at a speed of 0.5 m / s. The linkage control device simultaneously activates the sound and light alarm (sound pressure level ≥ 85 dB), cuts off the charging power supply around the fire source, and pushes an alarm message containing location and gas data to the management app (response time ≤ 5 seconds).

[0039] S3. Hierarchical fire extinguishing and strategy adjustment (real-time control) 1. Level 1 response (initial fire control): When the temperature is ≤200°C or the smoke concentration is ≥0.5mg / m³, the linkage control device activates the foam spray device: the pressure foam proportioning mixer mixes the foam liquid at a ratio of 3%, sprays it at a pressure of 0.6MPa, covers an area of 5m² within 15 seconds, and the temperature drops from 800°C to below 200°C; Level 2 Response (Enhanced Disposal): If the temperature exceeds 200°C, the fire area exceeds 2 m², or the H₂ concentration exceeds 100 ppm, the water extinguishing system will be activated. The fire pump will be pressurized to 0.8 MPa, and the sprinkler network will spray water at a rate of 8 L / min / m². If the H₂ concentration exceeds 200 ppm, water spraying will be suspended and the foam pressure will be increased to 0.8 MPa (to prevent explosion). The temperature sensor will provide feedback every 2 seconds. If the temperature drops by less than 50% within 30 seconds, the backup pump will be activated.

[0040] S4. Post-disaster assessment and data archiving (event closure) 1. Safety threshold determination: After extinguishing the fire, continuous monitoring is carried out for 30 minutes. When CO<50ppm, H2<10ppm and temperature<50℃, the environment is determined to be safe and the linkage control device restores power supply to the non-fault area; 2. Event data archiving: Generates a fire report containing information such as fire time, location coordinates, gas concentration curve, and foam / water usage, and stores it in the cloud (cycle: 5 years). The sensing and recognition device rechecks the vehicle location and marks abnormal binding status, providing data support for accident analysis and vehicle safety management.

[0041] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent fire extinguishing system suitable for electric bicycle centralized parking places, characterized in that: include: Smart Eye perception module, fire extinguishing disposal terminal, linkage control device, perception and recognition device, and environmental monitoring module; The smart eye perception module is installed on the canopy support frame of the venue, equipped with a dual-spectrum camera, a mobile platform and a mobile track, and a UWB positioning module at the bottom for fire source detection, precise positioning and dynamic fire extinguishing path planning; The fire extinguishing disposal end includes a foam spray device and a water fire extinguishing module, with a temperature sensor monitoring probe installed on the top, which is electrically connected to the smart eye perception module to form a three-dimensional fire extinguishing network; The linkage control device is installed on a column in the venue (2-3 meters from the ground) and is protected by a waterproof shell. It includes a power cut-off module and an audible and visual alarm. It is connected to the smart eye perception module via an optical cable and is used to cut off the power supply and issue an alarm signal when a fire source is detected. The sensing and identification device is deployed at the bottom of the parking rack and includes an RFID identification antenna and an NFC reader / writer. The RFID identification antenna reads the electronic tag information of the electric bicycle and combines the NFC reader / writer to realize the binding of vehicle identity authentication and parking position. The environmental monitoring module integrates an electrochemical gas sensor, which is installed on the smart eye perception module and electrically connected to the linkage device for continuous monitoring of the environmental gas concentration in the venue.

2. The intelligent fire extinguishing system suitable for electric bicycle centralized parking areas according to claim 1, characterized in that: The mobile platform of the smart eye perception module is driven by a servo motor and moves horizontally or vertically along the moving track on the awning support frame, cooperating with the UWB positioning module to achieve centimeter-level positioning of the fire source.

3. The intelligent fire extinguishing system suitable for electric bicycle centralized parking areas according to claim 1, characterized in that: The foam spraying device at the fire extinguishing disposal end adopts a pressure-type foam proportioning mixer, and the water-based fire extinguishing module includes a fire water pump and a sprinkler pipe network, which are both started in stages through a linkage control device.

4. The intelligent fire extinguishing system suitable for electric bicycle centralized parking areas according to claim 1, characterized in that: The linkage control device also includes a data processing unit for receiving fire source location data from the smart eye perception module and gas concentration data from the environmental monitoring module, and generating fire extinguishing control instructions.

5. The intelligent fire extinguishing system suitable for electric bicycle centralized parking areas according to claim 1, characterized in that: The environmental monitoring module monitors at least the concentration parameters of carbon monoxide, hydrogen, and smoke particles, and transmits the data in real time to the linkage control device for early warning analysis.

6. The intelligent fire extinguishing system suitable for electric bicycle centralized parking areas according to claim 1, characterized in that: The dual-spectrum camera simultaneously collects visible light and infrared light images, and distinguishes fire sources from background heat sources through image recognition algorithms, thereby reducing false alarm rates.

7. The intelligent fire extinguishing system suitable for electric bicycle centralized parking areas according to claim 6, characterized in that: The image recognition algorithm first extracts the color features of the visible light image, then analyzes the thermal features of the infrared image, and finally generates the final fire source determination result through dual-spectrum feature fusion decision.

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