Fire-fighting operation method and system

Abstract

The invention provides a fire-fighting operation method and system. The fire-fighting operation method comprises the steps that a water outlet standby trigger state corresponding to a water outlet standby operation key is read; if the water outlet standby triggering state is water outlet standby starting, the fire fighting operation system is made to be in the water outlet standby state by controlling a tank water outlet valve, an independent engine, a water pump clutch, water pump outlet pressure and a tank water injection valve; reading a water outlet trigger state corresponding to the water outlet operation key; if the water outlet triggering state is water outlet starting, the fire fighting operation system is made to conduct water outlet operation by controlling a tank water injection valve, an independent engine, the water pump outlet pressure and a water outlet valve. The whole water outlet operation process can be automatically completed through the provided two keys, and the whole water outlet operation process of an operator is simplified.

Description

Technical Field

[0001] The present application relates to the field of automation control technology, and in particular to a firefighting method and system. Background Art

[0002] In the operation process of the airport fire truck provided by the existing technology, there are many processes. For each step of the water discharge process, the operator needs to wait for the previous action to be completed before the next action can be performed. Most of the time in the whole process is spent on waiting, which greatly reduces the speed of the vehicle to discharge water at the fire scene. In addition, the operation process is difficult and it is easy to delay the firefighting operation due to the operator's operational errors, thereby causing serious safety problems. Summary of the Invention In view of this, the purpose of this application is to provide at least a fire-fighting operation method and system, which can automatically complete the entire water-discharging operation process by simply pressing two buttons in succession, thereby simplifying the operator's operation process of the entire water-discharging operation, reducing the operating requirements for the operator, reducing the probability of operator misoperation, and improving the stability of the system.

[0003] This application mainly includes the following aspects: In the first aspect, an embodiment of the present application provides a fire-fighting operation method, which is applied to an upper controller in a fire-fighting operation system. The upper controller is connected to a water discharge preparation operation button and a water discharge operation button. The method includes: reading the water discharge preparation trigger state corresponding to the water discharge preparation operation button; if the water discharge preparation trigger state is to start water discharge preparation, then by controlling the tank water discharge valve, independent engine, water pump clutch, water pump outlet pressure and tank water injection valve, the fire-fighting operation system is put into a water discharge preparation state; reading the water discharge trigger state corresponding to the water discharge operation button; if the water discharge trigger state is to start water discharge, then by controlling the tank water injection valve, independent engine, water pump outlet pressure and water discharge valve, the fire-fighting operation system performs water discharge operation.

[0004] In one possible implementation, the firefighting system is put into a water discharge standby state in the following manner: opening the tank water discharge valve and starting an independent engine for driving a water pump; after the independent engine has been running stably for a given period of time, engaging the water pump clutch; using a vacuum pump to ensure that the water pressure in the pump meets a given water pressure requirement; and opening the tank water injection valve to put the fire truck into a water discharge standby state.

[0005] In one possible implementation, the firefighting system is instructed to discharge water by: closing the tank water filling valve; reading the water pump outlet pressure through the water pump outlet pressure sensor; increasing the water pump outlet pressure to a preset pressure based on the water pump outlet pressure by combining a direct proportional pressure regulation strategy and a PID pressure controller; and opening the water cannon valve to put the fire truck in a water discharge state.

[0006] In one possible implementation, the water pump outlet pressure is increased to a preset pressure by: calculating the difference between the preset pressure and the water pump outlet pressure; if the difference is greater than a given threshold, using a proportional pressure regulation strategy to increase the water pump outlet pressure to the preset pressure; if the difference is less than or equal to the given threshold, using a PID pressure controller to increase the water pump outlet pressure to the preset pressure.

[0007] In one possible embodiment, the proportional pressure regulation strategy includes: increasing the water pump outlet pressure according to a given proportional boost speed; re-reading the water pump outlet pressure through the water pump outlet pressure sensor; calculating the absolute value of the difference between the preset pressure and the water pump outlet pressure; determining whether the absolute value is less than a given threshold; if the absolute value is less than the given threshold, adjusting the water pump outlet pressure to the preset pressure using a PID pressure controller; if the absolute value is greater than or equal to the given threshold, determining whether the difference is greater than zero; if the difference is greater than zero, returning to execute increasing the water pump outlet pressure according to a given proportional boost speed; if the difference is less than zero, reducing the water pump outlet pressure according to a given proportional depressurization speed; returning to execute re-reading the water pump outlet pressure through the water pump outlet pressure sensor.

[0008] In a possible implementation, the time interval between two adjacent speed adjustments of the independent engine is determined by the response speed of the independent engine and the response speed of the water system.

[0009] In a possible embodiment, the method also includes: in response to a water discharge preparation exit signal, causing the fire-fighting operation system to exit the water discharge automatic control process triggered by the water discharge preparation operation button, wherein the water discharge preparation exit signal includes at least an engine throttle adjustment signal, an emergency stop button trigger signal, a switching signal indicating that the water discharge preparation trigger state changes from start to exit, a water pump outlet pressure sensor fault signal, a communication abnormality signal, and an upper controller fault signal.

[0010] In a possible embodiment, the upper controller is also connected to a foam mode operation button, wherein the method further includes: reading the foam mode trigger state corresponding to the foam mode operation button; if the foam mode trigger state is to start the foam mode, then reading the water pump outlet pressure through the water pump outlet pressure sensor; determining whether the water pump outlet pressure is greater than the foam mode pressure threshold; if the water pump outlet pressure is less than or equal to the foam mode pressure threshold, closing the foam inlet valve and the foam liquid outlet valve; returning to read the water pump outlet pressure again through the water pump outlet pressure sensor.

[0011] In a possible embodiment, the method also includes: if the water pump outlet pressure is greater than or equal to the foam mode pressure threshold and the fire fighting operation system is in a water discharge standby state, then executing: determining whether the fire fighting operation system is in a water discharge pressure regulation process; if the fire fighting operation system is in a water discharge pressure regulation process, then opening the foam inlet valve and the foam liquid outlet valve, and returning to read the water pump outlet pressure through the water pump outlet pressure sensor; if the fire fighting operation system is not in a water discharge pressure regulation process, then closing the foam inlet valve and the foam liquid outlet valve, and returning to read the water pump outlet pressure through the water pump outlet pressure sensor.

[0012] On the second aspect, an embodiment of the present application also provides a fire-fighting operation system, which includes an upper-mounted control and an independent engine that apply the fire-fighting operation method provided in any of the above embodiments. The upper-mounted control and the independent engine use CAN communication. The upper-mounted control is at least connected to a water discharge preparation operation button, a water discharge operation button, a foam mode operation button, a water pump outlet pressure sensor, a water pump clutch, a tank water discharge valve, a tank water injection valve, a water cannon water discharge valve, a foam liquid discharge valve and a foam induction valve.

[0013] The embodiments of the present application provide a firefighting method and system, including: reading the water discharge preparation trigger state corresponding to a water discharge preparation operation button; if the water discharge preparation trigger state is to start water discharge preparation, then controlling the tank water discharge valve, independent engine, water pump clutch, water pump outlet pressure, and tank water filling valve to put the firefighting operation system into the water discharge preparation state; reading the water discharge trigger state corresponding to a water discharge operation button; if the water discharge trigger state is to start water discharge, then controlling the tank water filling valve, independent engine, water pump outlet pressure, and water discharge valve to cause the firefighting operation system to perform a water discharge operation. The entire water discharge operation process can be automatically completed with the two provided buttons, simplifying the operator's operation of the entire water discharge operation process.

[0014] This application is beneficial in that: (1) By integrating the water discharge preparation function, the longer water discharge preparation time is moved forward to the journey to the fire scene. When the vehicle arrives at the fire scene, the water system is ready, which greatly reduces the water discharge time at the fire scene.

[0015] (2) Simplify the water discharge operation process of firefighters. The entire water discharge process only requires two buttons, which reduces the probability of misoperation and improves the stability of the system.

[0016] (3) The water discharge process is simple to operate. The operator does not need to pay attention to the instrument display on the upper body to monitor the working status of the water system. He can focus more on driving the vehicle, ensuring driving safety. At the same time, it makes it possible for a single person to complete the function of pumping water while driving, thereby optimizing the personnel configuration.

[0017] (4) The water pump pressure regulation and water outlet control adopts a combination of proportional pressure regulation and PID pressure control, which has the advantages of fast pressure increase speed, smooth pressure increase process, and high control accuracy, thereby improving the stability of water outlet.

[0018] (5) The water discharge method adopts the method of holding pressure first and then spraying, which maximizes the use of limited water resources in the water tank to the ignition point, reduces water waste, and improves water discharge efficiency.

[0019] (6) The “foam mode” function simplifies the foaming process. Firefighters do not need to pay attention to the current working status of the water system. They only need to worry about whether foam is needed. The system will automatically open or close the foaming valve according to the working conditions of the water system.

[0020] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 One of the flow charts of a firefighting method provided in an embodiment of the present application is shown.

[0023] Figure 2 A schematic structural diagram of a firefighting system provided in an embodiment of the present application is shown; Figure 3 The second flowchart of a firefighting method provided in an embodiment of the present application is shown; Figure 4 One of the flow charts of a firefighting method provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of illustration and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowcharts can be implemented out of sequence, and steps without logical context can be reversed or implemented simultaneously. In addition, those skilled in the art, under the guidance of the contents of this application, can add one or more other operations to the flowchart, or remove one or more operations from the flowchart.

[0025] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0026] Currently, airport fire trucks usually use a dual-engine solution with independent engines driving water pumps to meet the needs of pumping water while driving. Specifically, when an emergency call is needed, the airport fire truck driver needs to drive the vehicle to the scene of the emergency and perform the following operations: S1. Open the water outlet valve of the water tank.

[0027] S2. Start the rear engine connected to the water pump.

[0028] S3. After the engine runs stably, engage the water pump clutch device.

[0029] S4. Check the clutch engagement status and the water pump pressure. If there is gas in the pump that has not been eliminated, start the vacuum pump in time. After the gas in the pump is completely eliminated and the water pressure in the pump is established, turn off the vacuum pump.

[0030] S5. Open the water outlet valve of the water monitor.

[0031] S6. Operate the fire monitor handle to adjust the angle of the fire monitor.

[0032] S7. Adjust the engine speed in real time, adjust the water pump pressure to the rated water output state, and perform fire extinguishing operations.

[0033] S8. If foam is used, the foam outlet valve and foam inlet valve need to be opened in time according to the water output status.

[0034] S9. After the fire is extinguished, follow the above reverse order to stop the operation.

[0035] Due to the particularity of airport firefighting, airport fire trucks are required to be able to extinguish fires at mobile fire points, so airport fire trucks are required to have the function of pumping water while driving. The operation process of the above-mentioned airport fire truck is not only complicated, but also has strict sequence requirements for the operation process. In addition, firefighters must always keep an eye on the dashboard, and there are also high requirements for the timing of operation. If a single person is required to drive the vehicle and successfully complete the water discharge and fire extinguishing operation, if the operation is carried out through the above process, the requirements for the driver are very high. Once an operational error occurs, the water discharge may be delayed at the least, and the water system on the airport fire truck may be damaged at the worst.

[0036] In the operation process of the above-mentioned airport fire truck provided by the prior art, there are many processes. For each step of the water discharge process, the operator needs to wait for the previous action to be completed before the next action can be performed. Most of the time in the whole process is a waiting process, which greatly reduces the speed of the vehicle to discharge water at the fire scene. In addition, the operation process is difficult and it is easy to delay the firefighting operation due to the operator's operational errors, thereby causing serious safety problems.

[0037] Based on this, the embodiments of the present application provide a firefighting method and system applicable to airport fire trucks. By introducing a water discharge preparation function through a water discharge preparation operation button, the longer water discharge preparation time can be pre-positioned before reaching the fire scene. When the vehicle arrives at the fire scene, the water system is already ready, greatly reducing the water discharge time at the fire scene. The details are as follows: See also Figure 1 , Figure 1 FIG1 shows one of the flow charts of a firefighting method provided in an embodiment of the present application. Figure 2 , Figure 2 FIG. 1 shows a schematic diagram of the structure of a firefighting system provided in an embodiment of the present application. Figure 1 and Figure 2 As shown, the fire-fighting operation system includes a top-mounted controller 1 and an independent engine 2, wherein the top-mounted controller 1 is connected to the water discharge preparation operation button SW1, the water discharge operation button SW2, the water pump outlet pressure sensor 31, the water pump outlet pressure sensor 32, the water pump clutch 33, the tank water discharge valve 34, the tank water injection valve 35, the water monitor water discharge valve 36, the foam liquid discharge valve 37 and the foam induction valve 38.

[0038] In a specific embodiment, CAN communication is adopted between the upper-mounted controller 1 and the independent engine 2. Mainly based on CAN communication, the upper-mounted controller 1 realizes the control functions such as starting, stopping, and speed of the independent engine 2, and can also collect the real-time speed of the independent engine 2.

[0039] The water pump outlet pressure sensor 31 is used to collect the water pump outlet pressure.

[0040] The water pump clutch 33 is a clutch device for controlling the independent engine 2 and the water pump.

[0041] The tank outlet valve 34 is used to control the valve that discharges water from the water tank to the water pump.

[0042] The tank filling valve 35 is used to control the valve from the water pump outlet to the water tank, so as to realize the self-circulation of the water pump at a low speed and prevent the problem of excessive temperature rise of the water pump caused by water stagnation.

[0043] The foam liquid outlet valve 37 and the foam inlet valve 38 are used to realize the foam outlet function.

[0044] The water discharge preparation operation button SW1 is used to generate a signal for entering or exiting the water discharge preparation state under user operation and transmit it to the upper body controller 1.

[0045] The water outlet operation button SW2 is used to generate a signal for entering or exiting the water outlet state under user operation and transmit it to the upper body controller 1.

[0046] In a preferred embodiment, the firefighting method provided in the embodiment of the present application includes the following steps: Read the water discharge preparation trigger status corresponding to the water discharge preparation operation button. If the water discharge preparation trigger status is to start water discharge preparation, then the fire-fighting operation system is put into the water discharge preparation state by controlling the tank water discharge valve, independent engine, water pump clutch, water pump outlet pressure and tank water filling valve. Read the water discharge trigger status corresponding to the water discharge operation button. If the water discharge trigger status is to start water discharge, then the fire-fighting operation system is made to perform water discharge operation by controlling the tank water filling valve, independent engine, water pump outlet pressure and water discharge valve.

[0047] Preferably, the water discharge preparation trigger state includes starting water discharge preparation and exiting water discharge preparation, and the water discharge trigger state includes starting water discharge and stopping water discharge. After the upper controller of this application is powered on, it enters the system initialization. The purpose of the initialization step is to load the relevant control parameters during the firefighting operation. After the upper controller completes the initialization, the water discharge preparation trigger state defaults to exiting water discharge preparation, and the water discharge trigger state defaults to stopping water discharge. Furthermore, in response to the operator pressing the water discharge preparation operation button, the water discharge preparation trigger state is switched from exiting water discharge preparation to starting water discharge preparation, and the corresponding water discharge preparation state regulation process is triggered.

[0048] After the fire-fighting operation system is in the water-discharging preparation state, in response to the operator pressing the water-discharging operation button, the water-discharging trigger state is switched from stopping water discharge to starting water discharge, and the corresponding water-discharging control process is triggered, ultimately enabling the fire-fighting operation system to formally perform water-discharging operations.

[0049] In the above-mentioned firefighting operation process provided by the present application, after the upper controller is powered on and initialized, the operator (such as a firefighter) only needs to press two buttons (the water discharge preparation operation button and the water discharge operation button) in succession to automatically complete the entire water discharge operation process, which simplifies the operator's operation process of the entire water discharge operation. Compared with the water discharge operation provided by the prior art, the solution provided by the present application does not require the operator to always pay attention to the dashboard to determine whether to execute the next action, thereby reducing the operating requirements for the operator, reducing the probability of operator misoperation, and improving the stability of the system.

[0050] Moreover, the method provided by this application allows the driver to concentrate more on driving the vehicle when there is only a driver operating the fire truck, ensuring driving safety. At the same time, it makes it possible for a single person to complete the function of pumping water while driving, thereby optimizing the personnel configuration.

[0051] In addition, the operator can put the entire firefighting system into a water-discharging preparation state by pressing the water-discharging preparation operation button before driving to the fire scene. That is, the longer water-discharging preparation time required by the firefighting system can be advanced to the journey before reaching the fire scene. When the vehicle arrives at the fire scene, the firefighting system is ready. Just press the water-discharging operation button to quickly complete the water discharge, which greatly reduces the water-discharging time of the entire firefighting system at the fire scene, thereby achieving the purpose of rapid fire extinguishing response and further reducing the risk of the fire becoming more serious.

[0052] In a preferred embodiment, the firefighting system is put into a water discharge standby state by: Open the tank water outlet valve and start the independent engine used to drive the water pump. After the independent engine has been running stably for a given period of time, engage the water pump clutch and use the vacuum pump to make the water pressure in the pump meet the given water pressure requirement. Open the tank water filling valve and put the fire truck in a water discharge standby state.

[0053] In a specific embodiment, the given water pressure requirement may be selected to be less than 0.1 MPa.

[0054] like Figure 1 As shown, the firefighting method provided in the embodiment of the present application, after the upper controller completes the system initialization, makes the firefighting system enter the water discharge standby state, specifically including: S100, reading the water discharge preparation trigger state corresponding to the water discharge preparation operation button.

[0055] S101. If the water discharge preparation trigger state is to start water discharge preparation, open the tank water discharge valve.

[0056] S102: Determine whether the independent engine is started.

[0057] Among them, whether the independent engine is started can be determined by reading the corresponding speed of the independent engine. If the speed is 0, it means that the independent engine is not started. If the speed is greater than 0, it means that the independent engine is started. S103: If the independent engine is not started, start the independent engine.

[0058] S104: If the independent engine is started, determine whether the independent engine has been running stably for a given time period.

[0059] The given time period may be 5 seconds. If the independent engine does not run stably for the given time period, the stability timing is restarted and the process returns to step S104.

[0060] S105: If the independent engine runs stably for a given period of time, read the water pump clutch state.

[0061] S106 : Determine whether the water pump clutch is engaged based on the water pump clutch state.

[0062] S107: If the water pump clutch is not engaged, engage the water pump clutch and return to S105.

[0063] S108. If the water pump clutch is engaged, read the water pump outlet pressure A through the water pump outlet pressure sensor.

[0064] S109: Determine whether the water pump outlet pressure A is less than 0.1 MPa.

[0065] S110: If the water pump outlet pressure is less than 0.1 MPa, start the vacuum pump to remove the air in the water pump, and return to S108.

[0066] S111. If the water pump outlet pressure is greater than or equal to 0.1 MPa, stop the vacuum pump and open the tank water injection valve.

[0067] S112. Change the fire operation system status flag to the water discharge standby state.

[0068] In a preferred embodiment, the fire fighting system is instructed to discharge water by: Close the tank water filling valve, read the water pump outlet pressure through the water pump outlet pressure sensor, and according to the water pump outlet pressure, use a combination of a semi-closed-loop proportional boost strategy and a closed-loop pressure controller pressure control strategy to increase the water pump outlet pressure to the preset pressure, and open the water monitor valve to put the fire truck in the water discharge state.

[0069] In a specific embodiment, after the upper controller is powered on and initialized, it will load the preset pressure to facilitate the water pressure control of the subsequent water discharge operation.

[0070] Specifically, when the entire fire-fighting operation system is in a water-discharging standby state, the tank water filling valve is automatically closed in response to the operator pressing the water-discharging operation button. At the same time, the semi-closed-loop proportional pressure regulation strategy and the closed-loop PID pressure controller are combined to automatically increase the water pump outlet pressure to the preset pressure.

[0071] Using the direct proportional pressure regulation strategy alone to adjust the water pump outlet pressure makes the pressure boosting process smooth and can prevent overshoot, but the pressure control is not precise enough. Using the PID pressure controller alone for pressure boosting will cause overshoot during the pressure boosting process, resulting in unstable pressure in the water pressure system. Therefore, in the water pump outlet pressure boosting process provided by this application, the direct proportional pressure regulation strategy and the PID pressure controller are combined to realize water pump pressure control, which ensures the stability of the water pump outlet pressure while improving the pressure control accuracy.

[0072] In a preferred embodiment, the water pump outlet pressure is increased to a preset pressure by: The difference between the preset pressure and the pump outlet pressure is calculated. If the difference is greater than a given threshold, a proportional pressure regulation strategy is used to increase the pump outlet pressure to the preset pressure. If the difference is less than or equal to the given threshold, a PID pressure controller is used to increase the pump outlet pressure to the preset pressure.

[0073] Preferably, the given threshold value may be 0.1MPa. The default situation of this application is: after the fire-fighting operation system is in the water discharge standby state, the preset pressure is greater than the water pump outlet pressure. In this application, when the difference between the preset pressure and the water pump outlet pressure is greater than the given threshold value, it means that the gap between the preset pressure and the water pump outlet pressure is large. At this time, the direct proportional pressure regulation strategy can be directly used to achieve rapid adjustment of the water pump outlet pressure. When the difference between the preset pressure and the water pump outlet pressure is less than or equal to the given threshold value, it means that the gap between the preset pressure and the water pump outlet pressure is small. At this time, the PID pressure controller can be directly used to achieve fine and accurate control and adjustment of the water pump outlet pressure.

[0074] In a preferred embodiment, the proportional voltage regulation strategy includes: The water pump outlet pressure is increased according to a given proportional boost speed, the water pump outlet pressure is re-read through the water pump outlet pressure sensor, the absolute value of the difference between the preset pressure and the water pump outlet pressure is calculated, and it is determined whether the absolute value is less than a given threshold value. If the absolute value is less than or equal to the given threshold value, the water pump outlet pressure is adjusted to the preset pressure by using the PID pressure controller. If the absolute value is greater than the given threshold value, it is determined whether the difference is greater than zero. If the difference is greater than zero, the execution is returned to increase the water pump outlet pressure according to the given proportional boost speed. If the difference is less than zero, the water pump outlet pressure is reduced according to the given proportional depressurization speed, and the execution is returned to re-read the water pump outlet pressure through the water pump outlet pressure sensor.

[0075] In a specific embodiment, the proportional pressure regulation strategy can actually be further divided into two situations, namely, pressure increasing according to a given proportional pressure increasing rate and pressure reducing according to a given proportional pressure increasing rate, according to the positive or negative value of the difference between the preset pressure and the water pump outlet pressure. Specifically, when the absolute value of the difference between the preset pressure and the water pump outlet pressure is greater than a given threshold and the difference between the preset pressure and the water pump outlet pressure is greater than zero, pressure increasing is required; when the absolute value of the difference between the preset pressure and the water pump outlet pressure is greater than a given threshold and the difference between the preset pressure and the water pump outlet pressure is less than zero, pressure reducing is required.

[0076] Preferably, a given proportional boost speed or a given proportional depressurization speed can be achieved by adjusting the speed of the independent engine. Specifically, the given proportional boost speed can be increased by 20 revolutions per 200 ms. Similarly, the given proportional depressurization speed can also be reduced by 20 revolutions per 200 ms. Here, the time interval between two adjacent speed adjustments of the independent engine is determined by the response speed of the independent engine and the response speed of the water system, and no specific restrictions are made here.

[0077] See also Figure 2 , Figure 2 FIG2 shows a second flow chart of a fire fighting method provided by an embodiment of the present application. Figure 2 As shown, the firefighting method provided in the embodiment of the present application, after the upper controller controls the firefighting system to enter the water discharge standby state, the process of causing the firefighting system to perform the water discharge operation specifically includes: S200: Read the water outlet trigger status corresponding to the water outlet operation button.

[0078] S201: If the water outlet trigger state is to start water outlet, close the tank water filling valve.

[0079] If the water discharge trigger state is to stop water discharge, the tank water filling valve will be opened and the fire fighting operation system will be returned to the water discharge standby state.

[0080] S202. Read the water pump outlet pressure A through the water pump outlet pressure sensor.

[0081] S203: Calculate the difference between the preset pressure and the water pump outlet pressure A.

[0082] S204: Determine whether the difference between the preset pressure and the water pump outlet pressure is greater than 0.1 MPa.

[0083] S205: If the difference between the preset pressure and the water pump outlet pressure is greater than 0.1 MPa, the water pump outlet pressure is increased according to a given proportional pressure increase speed.

[0084] S206. Re-read the water pump outlet pressure A through the water pump outlet pressure sensor.

[0085] S207: Calculate the absolute value of the difference between the preset pressure and the water pump outlet pressure A.

[0086] S208. Determine whether the absolute value is less than 0.1 MPa.

[0087] S209: If the absolute value is less than 0.1 MPa, the water pump outlet pressure is adjusted to a preset pressure using a PID pressure controller.

[0088] S210 : If the absolute value is greater than or equal to 0.1 MPa, determine whether the difference between the preset pressure and the water pump outlet pressure A is greater than zero.

[0089] If the difference between the preset pressure and the water pump outlet pressure A is greater than zero, the process returns to step S205 .

[0090] S211: If the difference between the preset pressure and the water pump outlet pressure A is less than zero, the water pump outlet pressure is reduced according to a given proportional pressure reduction speed, and the process returns to step S206.

[0091] Further, returning to step S204, if the difference between the preset pressure and the water pump outlet pressure is less than or equal to 0.1 MPa, step S209 is executed.

[0092] In this application, after step S209, execute S212 and open the water cannon valve.

[0093] In the present application, after step S212, it is determined that the water pump outlet pressure regulation process is completed, and the pressure regulation process of steps S204 to S211 needs to be continuously executed subsequently.

[0094] Specifically, in the process of using the PID pressure controller for pressure regulation, as long as the water pump outlet pressure is adjusted to the preset pressure range, it can be determined that the water monitor valve can be opened to discharge water. The preset pressure range is set according to different needs.

[0095] Furthermore, the water discharge process of the present application is not limited to water discharge from a cannon, and may also be water discharge from a water gun, a reel, or other water discharge methods, which are not specifically limited here.

[0096] In the water discharge control process provided above in the present application, the water discharge method adopts the method of first holding the pressure and then spraying, which maximizes the use of limited water resources in the water tank to the ignition point, reduces water waste, and improves water discharge efficiency.

[0097] In a preferred embodiment, the method provided by the present application further includes: In response to the water discharge preparation exit signal, the fire-fighting operation system exits the water discharge automatic control process triggered by the water discharge preparation operation button, wherein the water discharge preparation exit signal includes at least the engine throttle adjustment signal, the emergency stop button trigger signal, the switching signal indicating the water discharge preparation trigger state from start to exit, the water pump outlet pressure sensor fault signal, the communication abnormality signal and the upper controller fault signal.

[0098] In a specific embodiment, although in the technical solution provided by the present application, the valve control and pressure-boosting processes in the water discharge operation process of the entire fire-fighting operation system are fully automatic processes and do not require human intervention, the entire process cannot be completed instantaneously. When special working conditions such as sudden changes in the external environment occur, it is necessary to exit a series of automatic control functions caused by the water discharge preparation state triggered by the water discharge preparation operation button. Specifically, the exit from the water discharge preparation state is achieved by detecting the water discharge preparation exit signal.

[0099] Furthermore, the water outflow preparation exit signal is divided into an active exit signal and a passive exit signal. The active exit signal at least includes an engine throttle adjustment signal, an emergency stop button trigger signal, and a switching signal indicating that the water outflow preparation trigger state changes from start to exit (for example, after the water outflow preparation is triggered, pressing the water outflow preparation operation button again can generate the corresponding water outflow preparation exit signal).

[0100] Passive exit signals include water pump outlet pressure sensor fault signal, communication abnormality signal and upper body controller fault signal.

[0101] When the upper controller detects any of the above-mentioned water discharge preparation exit signals, the fire-fighting operation system will exit the water discharge automatic control process triggered by the water discharge preparation operation button.

[0102] In one embodiment, see Figure 4 , Figure 4 FIG3 shows a flowchart of a fire fighting method provided by an embodiment of the present application. Figure 4 As shown, the foam mode pressure threshold adaptability is selected as 0.4 MPa. Furthermore, the method provided by this application also includes: S300: Read the foam mode triggering state corresponding to the foam mode operation button.

[0103] S301: If the foam mode triggering state is to start the foam mode, the water pump outlet pressure is read through the water pump outlet pressure sensor.

[0104] S302: Determine whether the water pump outlet pressure A is greater than 0.4 MPa.

[0105] S304: If the water pump outlet pressure A is greater than 0.4 MPa and the firefighting system is determined to be in a water discharge standby state, execute: S305: Determine whether the firefighting system is in the process of water outlet pressure regulation.

[0106] S306: If the firefighting system is in the water outlet pressure regulating process, open the foam inlet valve and the foam outlet valve, and return to step S301.

[0107] If the fire fighting system is not in the water outlet pressure regulating process, step S303 is executed.

[0108] In this application, the "foam mode" function is used to simplify the foam production process, and the operator does not need to pay attention to the current working status of the water system, but only needs to care about whether foam is needed. The system will automatically open or close the foam production valve according to the working conditions of the water system.

[0109] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A firefighting method, characterized in that: The upper controller is applied to a fire fighting system, and the upper controller is connected to a water discharge preparation operation button and a water discharge operation button. The method includes: Read the water discharge preparation trigger status corresponding to the water discharge preparation operation button; If the water discharge preparation trigger state is to start water discharge preparation, the fire fighting system is put into the water discharge preparation state by controlling the tank water discharge valve, independent engine, water pump clutch, water pump outlet pressure and tank filling valve; Read the water outflow trigger status corresponding to the water outflow operation button; If the water discharge trigger state is to start water discharge, the fire fighting operation system will be instructed to perform water discharge operation by controlling the water filling valve of the tank, the independent engine, the water pump outlet pressure and the water discharge valve.

2. The method according to claim 1, characterized in that The firefighting system is placed in a water-discharging state by: Open the tank outlet valve and start the independent engine driving the water pump; After the independent engine has been running stably for a given period of time, engaging the water pump clutch; The water pressure in the pump is made to meet the given water pressure requirement through the vacuum pump; Open the tank water filling valve to put the fire truck in a water discharge ready state.

3. The method according to claim 1, characterized in that The fire fighting system can start water discharge operation by the following methods: Close the tank fill valve; Read the water pump outlet pressure through the water pump outlet pressure sensor; According to the outlet pressure of the water pump, a direct proportional pressure regulation strategy and a PID pressure controller are combined to increase the outlet pressure of the water pump to a preset pressure; Open the water monitor valve to put the fire truck in water discharge state.

4. The method according to claim 3, characterized in that Increase the pump outlet pressure to the preset pressure by the following methods: Calculating the difference between the preset pressure and the water pump outlet pressure; If the difference is greater than a given threshold, a proportional pressure regulation strategy is adopted to increase the water pump outlet pressure to a preset pressure; If the difference is less than or equal to a given threshold, a PID pressure controller is used to increase the water pump outlet pressure to a preset pressure.

5. The method according to claim 3, characterized in that The direct proportional voltage regulation strategy includes: Increase the pump outlet pressure according to a given proportional boost speed; Re-read the water pump outlet pressure through the water pump outlet pressure sensor; Calculating the absolute value of the difference between the preset pressure and the water pump outlet pressure; determining whether the absolute value is less than a given threshold; If the absolute value is less than a given threshold, the water pump outlet pressure is adjusted to a preset pressure using a PID pressure controller; If the absolute value is greater than or equal to a given threshold, determining whether the difference is greater than zero; If the difference is greater than zero, the process returns to executing the process of increasing the pump outlet pressure according to a given proportional pressure increasing speed; If the difference is less than zero, the pump outlet pressure is reduced according to a given proportional pressure reduction rate; Return to execute and re-read the water pump outlet pressure through the water pump outlet pressure sensor.

6. The method according to claim 5, characterized in that The time interval between two adjacent speed adjustments of the independent engine is determined by the response speed of the independent engine and the response speed of the water system.

7. The method according to claim 1, characterized in that The method further comprises: In response to the water discharge preparation exit signal, the fire fighting system exits the water discharge automatic control process triggered by the water discharge preparation operation button. Among them, the water outlet preparation exit signal includes at least the engine throttle adjustment signal, the emergency stop button trigger signal, the switching signal indicating the water outlet preparation trigger state from start to exit, the water pump outlet pressure sensor fault signal, the communication abnormality signal and the upper body controller fault signal.

8. The method according to claim 3, characterized in that The upper controller is also connected to the foam mode operation button. The method further comprises: Read the foam mode trigger status corresponding to the foam mode operation button; If the foam mode trigger state is to start the foam mode, the water pump outlet pressure is read through the water pump outlet pressure sensor; determining whether the water pump outlet pressure is greater than a foam mode pressure threshold; If the water pump outlet pressure is less than or equal to the foam mode pressure threshold, closing the foam induction valve and the foam liquid outlet valve; Return and read the water pump outlet pressure again through the water pump outlet pressure sensor.

9. The method according to claim 8, characterized in that The method further comprises: If the water pump outlet pressure is greater than the foam mode pressure threshold and the fire fighting system is in the water discharge standby state, execute: Determine whether the fire-fighting system is in the process of water outlet pressure regulation; If the fire fighting system is not in the process of water outlet pressure regulation, close the foam inlet valve and the foam outlet valve, and return to read the water pump outlet pressure through the water pump outlet pressure sensor; If the fire-fighting operation system is in the process of water outlet pressure regulation, the foam inlet valve and the foam liquid outlet valve are opened, and the water pump outlet pressure is read through the water pump outlet pressure sensor.

10. A fire fighting system, characterized in that: The fire-fighting operation system includes an upper-mounted control and an independent engine that apply the fire-fighting operation method described in any one of claims 1 to 9. The upper-mounted control and the independent engine adopt CAN communication. The upper-mounted control is at least connected to a water discharge preparation operation button, a water discharge operation button, a foam mode operation button, a water pump outlet pressure sensor, a water pump clutch, a tank water discharge valve, a tank water filling valve, a water cannon water discharge valve, a foam liquid discharge valve and a foam induction valve.

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