Water mist fire extinguishing online monitoring digital twin method and system

Abstract

The application provides a fine water mist fire extinguishing online monitoring digital twin method and system, and the method comprises the following steps: arranging an Ethernet data transmission flow sensor at a connection position of a water tank and a pump group of a fine water mist fire extinguishing system to form a flow sensor network, and collecting flow sensor transmission data; receiving and processing the flow sensor transmission data in real time on a remote control room host computer; monitoring and obtaining fire alarm information, and processing the flow sensor transmission data and the fire alarm information in linkage to obtain a working state and a fault state of the fine water mist fire extinguishing system; and displaying the working state and the fault state of the fine water mist fire extinguishing system on the remote control room host computer to monitor the remote state of the fine water mist fire extinguishing system. The application solves the technical problem of low reliability of the fine water mist fire extinguishing system caused by difficulties in remote monitoring and fault troubleshooting.

Description

Technical Field

[0001] This invention relates to the field of security facility control data processing, specifically to a digital twin method and system for online monitoring of fine water mist fire extinguishing. Background Technology

[0002] Currently, for infrastructure with high fire risk, such as underground shopping malls and parking garages, some are equipped with fixed fire extinguishing systems such as water spray and high-pressure fine water mist. These systems use water as a medium and, after installation, can spray water mist under certain high pressure conditions. The mist particles move in three dimensions in space in a high-speed turbulent and rotating manner. After being sprayed, they are fully entrained, broken, and atomized with the external air to produce a high-speed, uniform fine water mist with a very small diameter. This allows for rapid spraying of fine water mist onto the protected object or space during a fire to extinguish, suppress, control, regulate temperature, and reduce dust. For example, the existing invention patent application document CN116832378A, entitled "An Externally Pressurized Perfluorohexanone Fine Water Mist Combined Fire Extinguishing and Cooling System," includes a nitrogen starter cylinder group, a nitrogen drive cylinder group, a perfluorohexanone tank, a water storage tank, a pipeline group, and a spray nozzle. In the event of thermal runaway, the detector detects the fire and sends feedback to the control component. The control component then activates the nitrogen activation cylinder group. The nitrogen activation cylinder group releases pressure to activate two nitrogen drive cylinder groups, which release high-pressure nitrogen and deliver it to the perfluorohexanone tank. After being pressurized, the perfluorohexanone is released into the third connecting pipe and sprayed through the nozzles. After the perfluorohexanone agent is completely sprayed, the control component closes the perfluorohexanone tank's discharge port. After the perfluorohexanone impregnation delay in the protected area, the control component controls the high-pressure nitrogen to pass through the water storage tank. The water in the water storage tank flows through the third connecting pipe and into the nozzles, causing the nozzles to spray through the fine water mist discharge holes, forming micro-water droplets to cool the protected area. And the existing invention patent application document CN109771867A, entitled "A Lithium Battery Handheld Fine Water Mist Fire Extinguishing Device," describes a lithium battery handheld fine water mist fire extinguishing device comprising a canister and a handle. The handle is movably connected to the top of the canister, and a square tube is fixedly connected to the side surface of the canister. The inner wall of the square tube is movably connected to the surface of a square rod, and a connecting rod is fixedly connected to the top of the square rod. The top of the connecting rod is fixedly connected to the bottom of a movable rod, which is located below the handle. A square groove is formed on the inner wall of the square tube, and a square ring is fixedly fitted onto the surface of the square rod. However, in the actual operation of the aforementioned prior art solutions, malfunctions in the fine water mist fire extinguishing system itself can easily lead to the risk of power outages in electrical equipment. In fire emergency response, if a large amount of water is not effectively drained, it can also lead to risks such as power outages in electrical equipment. The reliability of the fine water mist fire extinguishing system needs further improvement, and its remote status monitoring capability is still relatively weak.

[0003] In summary, existing technologies suffer from difficulties in remote monitoring and troubleshooting, leading to low reliability of fine water mist fire extinguishing systems. Summary of the Invention

[0004] The technical problem to be solved by this invention is: how to solve the technical problem of low reliability of fine water mist fire extinguishing system due to the difficulty of remote monitoring and fault diagnosis in the prior art.

[0005] This invention solves the above-mentioned technical problems by employing the following technical solution: A digital twin method for online monitoring of fine water mist fire extinguishing includes:

[0006] S1. At the connection between the water tank and the pump group of the fine water mist fire extinguishing system, Ethernet data transmission flow sensors are arranged to form a flow sensor network, so as to collect the flow sensor transmission data.

[0007] S2. The host computer in the remote fire control room receives and processes the data transmitted by the flow sensor in real time.

[0008] S3. Monitor and acquire fire alarm information, and process the data transmitted by the flow sensor and fire alarm information in conjunction with the system to determine the working status and fault status of the fine water mist fire extinguishing system.

[0009] S4. The host computer in the remote fire control room displays the working status and fault status of the fine water mist fire extinguishing system to monitor the remote status of the fine water mist fire extinguishing system.

[0010] This invention deploys flow sensors capable of data transmission via Ethernet at the connection point between the water tank and pump unit of the fine water mist system, forming a flow sensor network. A host computer in a remote fire control room receives and processes the data transmitted from the flow sensors in real time, simultaneously linking it with fire alarm information to calculate the current operating and fault states of the fine water mist fire extinguishing system. The host computer then displays the operating and fault states of the fine water mist fire extinguishing system, forming an online monitoring digital twin system to achieve remote status monitoring of the fine water mist fire extinguishing system.

[0011] In a more specific technical solution, in step S1, a water flow sensor is arranged in each fine water mist tank to deploy a flow sensor network to collect and transmit the flow analog signal to the RS485 signal transmitter node.

[0012] In a more specific technical solution, in step S1, the fire alarm information is input to the remote fire control room host computer 3 using an RS485 signal.

[0013] In a more specific technical solution, the remote fire control room host computer 3 includes: an RS485 HUB and a PC terminal; the RS485 HUB is used to aggregate and output RS485 signals to the serial port receiver of the PC terminal.

[0014] In a more specific technical solution, step S3 includes:

[0015] S31. Set the data collection time interval;

[0016] S32. According to the acquisition time interval, open the acquisition serial port to receive data transmitted by the flow sensor and fire alarm signal;

[0017] S33. Calculate the logical value of the fault state based on the data transmitted by the flow sensor, and obtain the fault state display signal accordingly. Calculate the logical value of the working state based on the fire alarm information, and obtain the working state display signal accordingly.

[0018] In a more specific technical solution, step S33 includes:

[0019] S321. Determine whether the signal value F(i) is greater than the pre-calibrated threshold Noise(i);

[0020] S322. If so, set the logic value of the i-th fine water mist device to 1 and adjust the working status to "started".

[0021] S324. Determine whether the logic value A(i) of the fire alarm signal is equal to 1;

[0022] S325. If so, the fault status is displayed as normal fire extinguishing.

[0023] S326. If not, the fault status will be displayed as no fire, leaking.

[0024] S327. If the signal value F(i) is less than or equal to the pre-calibrated threshold Noise(i), then set the logic value of the i-th fine water mist device to 0.

[0025] S328. Adjust the working status to not started;

[0026] S329. Determine whether the logical value A(i) is equal to 1;

[0027] S3210, If so, adjust the fault status to "Fire" or "Startup Failed";

[0028] S3211. If not, adjust the fault status to no fault.

[0029] In a more specific technical solution, in step S321, the pre-calibrated threshold Noise(i) is the maximum noise value of the i-th Ethernet data transmission flow sensor when the flow is 0.

[0030] In a more specific technical solution, in step S327, the working state of the fine water mist device includes: started state and not started state.

[0031] In a more specific technical solution, in step S329, the fault states of the fine water mist device include: normal fire extinguishing state, no fire, leaking state, no fault state, fire state, and start-up failure state.

[0032] In a more specific technical solution, the online monitoring digital twin system for fine water mist fire suppression includes:

[0033] The flow data acquisition module is used to deploy Ethernet data transmission flow sensors at the connection between the water tank and the pump group of the fine water mist fire extinguishing system to form a flow sensor network, thereby acquiring the flow sensor transmission data.

[0034] The real-time flow data processing module is used to receive and process the data transmitted by the flow sensor in real time on the host computer in the remote fire control room. The real-time flow data processing module is connected to the flow data acquisition module.

[0035] The status data linkage processing module is used to monitor and acquire fire alarm information, and to process the data transmitted by the flow sensor and the fire alarm information in conjunction with it, so as to obtain the working status and fault status of the fine water mist fire extinguishing system. The status data linkage processing module is connected to the flow data real-time processing module.

[0036] The remote monitoring module is used to display the working status and fault status of the fine water mist fire extinguishing system on the host computer in the remote fire control room, so as to monitor the remote status of the fine water mist fire extinguishing system. The remote monitoring module is connected to the status data linkage processing module.

[0037] Compared with existing technologies, this invention has the following advantages: It arranges flow sensors capable of data transmission via Ethernet at the connection between the water tank and pump unit of the fine water mist system, forming a flow sensor network. A host computer in the remote fire control room receives and processes the data transmitted from the flow sensors in real time, simultaneously linking it with fire alarm information to calculate the current operating and fault states of the fine water mist fire extinguishing system. The host computer then displays the operating and fault states of the fine water mist fire extinguishing system, forming an online monitoring digital twin system to achieve remote status monitoring of the fine water mist fire extinguishing system.

[0038] This invention solves the technical problem of low reliability of fine water mist fire extinguishing systems caused by difficulties in remote monitoring and fault diagnosis in the prior art. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the basic steps of the online monitoring digital twin method for fine water mist fire extinguishing according to Embodiment 1 of the present invention;

[0040] Figure 2 This is a schematic diagram of the basic modules of the online monitoring digital twin system for fine water mist fire extinguishing according to Embodiment 1 of the present invention;

[0041] Figure 3 This is a schematic diagram illustrating the specific architecture and data flow processing of the online monitoring digital twin system according to Embodiment 1 of the present invention;

[0042] Figure 4This is a schematic diagram illustrating the specific steps of the computing system fault state and working state in Embodiment 1 of the present invention;

[0043] Figure 5 This is a schematic diagram illustrating the specific steps for calculating the logic value of the working state / fault state in Embodiment 1 of the present invention;

[0044] Figure 6 This is a GUI interface diagram of the digital twin system software in Embodiment 1 of the present invention;

[0045] Figure 7 This is a schematic diagram illustrating the specific steps for calculating the working state / fault state logic value in Embodiment 1 of the present invention. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Example 1

[0048] like Figure 1 As shown, the online monitoring digital twin method for fine water mist fire suppression provided by this invention includes the following basic steps:

[0049] S1. Arrange flow sensors that can transmit data via Ethernet at the connection between the water tank and pump set of the fine water mist system to form a flow sensor network.

[0050] like Figure 2 As shown, in this embodiment, the online monitoring digital twin system for fine water mist fire suppression includes: a front-end flow sensor network 1, an RS485 signal transmitter node 2, a remote fire control room host computer 3, and digital twin system software 4.

[0051] like Figure 3 As shown, in this embodiment, each fine water mist tank is equipped with a water flow sensor (vortex type, turbine type, etc.), and every four flow sensors form a signal group to transmit the analog flow signal to RS485 signal transmitter node 2. Fire alarm information is input to the remote fire control room host computer 3 as an RS485 signal. In this embodiment, the remote fire control room host computer 3 includes, but is not limited to, an RS485 hub and a PC terminal; in this embodiment, the RS485 hub is used to aggregate all RS485 signals and output them to the PC serial port receiver.

[0052] In this embodiment, the flow data measured by the flow sensors in the front-end flow sensor network 1 is transmitted to the RS485 signal transmitter node 2 in the form of analog signals.

[0053] S2. The host computer in the remote fire control room receives and processes the data transmitted by the flow sensor in real time.

[0054] S3. By using the flow sensor to transmit data and link with fire alarm information, the current working status and fault status of the fine water mist fire extinguishing system are calculated.

[0055] In this embodiment, the host computer digital twin system software 4 uses flow data and fire alarm information data to perform calculations and display the current working status and fault status of the fine water mist fire extinguishing system.

[0056] like Figure 4 As shown, in this embodiment, the digital twin system software method used in step S3, which calculates the system fault state and operating state, further includes the following specific processing steps:

[0057] S31. Flow rate and fire alarm signal acquisition;

[0058] S32. Calculate and output the logic value of the working status / fault status;

[0059] like Figure 5 As shown, in this embodiment, step S32, which calculates the logic value of the working state / fault state, further includes the following specific steps:

[0060] S321. Determine whether the signal value F(i) is greater than Noise(i);

[0061] In this embodiment, the RS485 return signal value of the flow sensor is F(i), where F(i) is the reading of the i-th flow sensor. Noise(i) is the maximum noise value of the i-th flow sensor when the flow rate is 0. In this embodiment, Noise(i) needs to be pre-calibrated under the condition of 0 flow rate.

[0062] S322. If so, the logic value of the i-th fine water mist device is 1;

[0063] S323, Working status display shows that it has been started;

[0064] S324. Determine whether A(i) is equal to 1;

[0065] In this embodiment, A(i) is the logic value of the fire alarm signal. A value of 1 indicates that there is a fire at the location covered by the i-th fine water mist device, and 0 indicates that there is no fire.

[0066] S325. If so, the fault status is displayed as normal fire extinguishing.

[0067] S326. If not, the fault status will be displayed as no fire, leaking.

[0068] S327. If the signal value F(i) is less than or equal to Noise(i), then the logic value of the i-th fine water mist device is 0.

[0069] In this embodiment, the working state of the aforementioned fine water mist device includes, but is not limited to, the started state and the not started state. In this embodiment, the working state of the fine water mist device is determined by the logical value returned by F(i)>Noise(i).

[0070] S328, The working status is displayed as not started;

[0071] S329. Determine whether A(i) is equal to 1;

[0072] In this embodiment, the fine water mist fault state is determined by a composite logic value of F(i) > Noise(i) and A(i) = 1. In this embodiment, the fine water mist fault states include, but are not limited to: normal fire extinguishing state, no fire, leaking state, no fault state, fire state, and start-up failure state.

[0073] S3210, if so, the fault status is displayed as fire and start-up failure;

[0074] S3211. If not, the fault status will be displayed as no fault.

[0075] S33, GUI interface display;

[0076] In this embodiment, the digital twin system software GUI interface is as follows:

[0077] like Figure 6 As shown in this embodiment, a MATLAB GUI interface example of a digital twin system for online monitoring of fine water mist fire suppression based on a flow sensor is presented. The example assumes that the fine water mist system contains seven fine water mist devices.

[0078] In this embodiment, the callback function for the "Open Serial Port" button is as follows (the content after "%" in each line is a comment):

[0079] mtdds = modbus('serialrtu', temcom1); % Open the flow sensor acquisition channel, temcom1 is the corresponding serial port number;

[0080] mtddt = modbus('serialrtu', temcom2); % Open the fire alarm information acquisition channel, temcom2 is the corresponding serial port number;

[0081] In this embodiment, the callback function of the sensor noise calibration button includes, but is not limited to:

[0082] set(handles.edit7,'string','Sensor noise calibration in progress'); % Monitoring status display

[0083] for i = 1: 100% continuous acquisition for 10 seconds

[0084] F(i) = read(mtdds,'holdingregs',1,8); % Read the flow sensor readings

[0085] pause(0.1); % Stop for 0.1 seconds

[0086] end

[0087] Noise = max(abs(F(:))); % The maximum noise value is used as the background noise.

[0088] In this embodiment, the callback function for the "Start Monitoring" button includes, but is not limited to:

[0089] dt = str2double(get(handles.edit2,'string')); % Read the collection time interval

[0090] ds = str2double(get(handles.edit3,'string')); % Read the total number of fine water mist devices.

[0091] while(1)% loop signal acquisition + processing + display

[0092] starttime = clock; % Read the initial time

[0093] set(handles.edit7,'string','Collection Normal'); % Monitoring Status Display

[0094] F = read(mtdds,'holdingregs',1,ds); % Read the flow sensor readings

[0095] A = read(mtddt,'holdingregs',1,8); % Reads the logical values ​​of fire alarm information.

[0096] for i=1:ds

[0097] if F(i)-Noise>=0

[0098] set(handles.edit(i),'string','Started'); % Displays the working status of the i-th fine water mist device else

[0099] set(handles.edit(i),'string','Not started'); % Displays the working status of the i-th fine water mist device end

[0100] if(F(i)-Noise>=0)&&(A(i)==1)

[0101] set(handles.edit(i),'string','Normal fire extinguishing'); % Displays the fault status of the i-th fine water mist device elseif(F(i)-Noise>=0)&&(A(i)==0)

[0102] set(handles.edit(i),'string','No fire, leaking'); % Displays the fault status of the i-th fine water mist device elseif(F(i)-Noise<=0)&&(A(i)==0)

[0103] set(handles.edit(i),'string','No fault'); % Displays the fault status of the i-th fine water mist device else

[0104] set(handles.edit(i),'string','Fire situation, startup failed'); % Displays the fault status of the i-th fine water mist device.

[0105] end

[0106] end

[0107] ptime = clock;

[0108] perotime = ptime - starttime;

[0109] tpresent=perotime(3)*3600*24+perotime(4)*3600+perotime(5)*60+(perotime(6));

[0110] dd = (nn) * dt - tpresent;

[0111] pause(dd)% compensates for the remaining time

[0112] end

[0113] In this embodiment, RS485 signal transmitter node 2 transmits RS485 signals to the remote fire control room host computer 3;

[0114] like Figure 7 As shown, the data processing flow in the digital twin system software 4 also includes:

[0115] S31', Set the data collection time interval;

[0116] S32', Open the data acquisition serial port;

[0117] S33', Flow sensor signal reading;

[0118] S34', Fire alarm signal reading;

[0119] S35', Calculate the logic values ​​for the working status and fault status;

[0120] S36' Output GUI interface display;

[0121] S37', Wait for the data collection time interval to end;

[0122] S4. The host computer displays the working status and fault status of the fine water mist fire extinguishing system, forming an online monitoring digital twin system to realize remote status monitoring of the fine water mist fire extinguishing system.

[0123] In summary, this invention arranges flow sensors capable of data transmission via Ethernet at the connection between the water tank and pump unit of the fine water mist system, forming a flow sensor network. A host computer in the remote fire control room receives and processes the data transmitted from the flow sensors in real time, simultaneously linking it with fire alarm information to calculate the current operating and fault states of the fine water mist fire extinguishing system. The host computer then displays the operating and fault states of the fine water mist fire extinguishing system, forming an online monitoring digital twin system to achieve remote status monitoring of the fine water mist fire extinguishing system.

[0124] This invention solves the technical problem of low reliability of fine water mist fire extinguishing systems caused by difficulties in remote monitoring and fault diagnosis in the prior art.

[0125] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A digital twin method for online monitoring of water mist fire extinguishing, characterized in that, The method comprises: S1, arranging an Ethernet data transmission flow sensor at the connection between the water tank and the pump group of the water mist fire extinguishing system to form a flow sensor network to collect flow sensor transmission data; S2, receiving and processing the flow sensor transmission data in real time on the upper computer of the remote fire control room; S3, monitoring and obtaining fire alarm information, and processing the flow sensor transmission data and the fire alarm information to obtain the working state and the fault state of the water mist fire extinguishing system; S3 comprises: S31, setting a collection time interval; S32, opening a collection serial port according to the collection time interval to receive the flow sensor transmission data and the fire alarm signal; S33, calculating the logic value of the fault state according to the flow sensor transmission data to obtain a fault state display signal, and calculating the logic value of the working state according to the fire alarm information to obtain a working state display signal; S33 comprises: S321, judging whether the signal value F(i) is greater than a pre-set threshold value Noise(i); S322, if yes, setting the logic value of the i th water mist device to 1 and adjusting the working state to started; S324, judging whether the logic value A(i) of the fire alarm signal is equal to 1; S325, if yes, displaying the fault state as normal extinguishing; S326, if no, displaying the fault state as no fire and leakage; S327, if the signal value F(i) is less than or equal to the pre-set threshold value Noise(i), setting the logic value of the i th water mist device to 0; S328, adjusting the working state to unstarted; S329, judging whether the signal value A(i) is equal to 1; S3210, if yes, adjusting the fault state to fire and startup failure; S3211, if no, adjusting the fault state to no fault; S4, displaying the working state and the fault state of the water mist fire extinguishing system on the upper computer of the remote fire control room to monitor the remote state of the water mist fire extinguishing system.

2. The water mist fire suppression online monitoring digital twin method of claim 1, wherein, In the step S1, one water flow sensor is arranged on each water tank of the water mist to deploy the flow sensor network to collect and transmit flow analog signals to the RS485 signal transmitter node.

3. The water mist fire suppression online monitoring digital twin method of claim 1, wherein, In the step S1, the fire alarm information is input to the upper computer 3 of the remote fire control room by using the RS485 signal.

4. The water mist fire suppression online monitoring digital twin method of claim 3, wherein, The upper computer 3 of the remote fire control room comprises an RS485 HUB and a PC terminal; the RS485 HUB is used to output the RS485 signal to the serial port receiver of the PC terminal.

5. The water mist fire suppression online monitoring digital twin method of claim 1, wherein, In the step S321, the pre-set threshold value Noise(i) is the maximum noise value of the i th Ethernet data transmission flow sensor in the flow state of 0.

6. The water mist fire suppression online monitoring digital twin method of claim 1, wherein, In the step S327, the working state of the water mist device comprises started state and unstarted state.

7. The water mist fire suppression online monitoring digital twin method of claim 1, wherein, In the step S329, the fault state of the water mist device comprises normal extinguishing state, no fire and leakage state, no fault state, fire and startup failure state.

8. The water mist fire suppression online monitoring digital twin system for performing the water mist fire suppression online monitoring digital twin method of any one of the preceding claims 1 to 7, characterized in that, The system comprises: The flow data acquisition module is arranged with an Ethernet data transmission flow sensor at the connection between the water tank and the pump group of the water mist fire extinguishing system to form a flow sensor network, so as to acquire the transmission data of the flow sensor; The flow data real-time processing module is used for receiving and real-time processing the transmission data of the flow sensor on the host computer of the remote control room, and is connected with the flow data acquisition module; The state data linkage processing module is used for monitoring and acquiring fire alarm information, and linkage processing the transmission data of the flow sensor and the fire alarm information, so as to obtain the working state and fault state of the water mist fire extinguishing system, and is connected with the flow data real-time processing module; The remote monitoring module is used for displaying the working state and fault state of the water mist fire extinguishing system on the host computer of the remote control room, so as to monitor the remote state of the water mist fire extinguishing system, and is connected with the state data linkage processing module.

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